Beckmann Distribution sample, tan2theta, alphax == alphay

Percentage Accurate: 55.5% → 99.0%

Time: 10.7s

Alternatives: 14

Speedup: 21.6×

Specification

\[\left(0.0001 \leq \alpha \land \alpha \leq 1\right) \land \left(2.328306437 \cdot 10^{-10} \leq u0 \land u0 \leq 1\right)\]

Math

\[\begin{array}{l} \\ \left(\left(-\alpha\right) \cdot \alpha\right) \cdot \log \left(1 - u0\right) \end{array} \]

FPCore

(FPCore (alpha u0)
 :precision binary32
 (* (* (- alpha) alpha) (log (- 1.0 u0))))

C

float code(float alpha, float u0) {
	return (-alpha * alpha) * logf((1.0f - u0));
}

Fortran

real(4) function code(alpha, u0)
    real(4), intent (in) :: alpha
    real(4), intent (in) :: u0
    code = (-alpha * alpha) * log((1.0e0 - u0))
end function

Julia

function code(alpha, u0)
	return Float32(Float32(Float32(-alpha) * alpha) * log(Float32(Float32(1.0) - u0)))
end

MATLAB

function tmp = code(alpha, u0)
	tmp = (-alpha * alpha) * log((single(1.0) - u0));
end

Initial Program: 55.5% accurate, 1.0× speedup

Math

\[\begin{array}{l} \\ \left(\left(-\alpha\right) \cdot \alpha\right) \cdot \log \left(1 - u0\right) \end{array} \]

FPCore

(FPCore (alpha u0)
 :precision binary32
 (* (* (- alpha) alpha) (log (- 1.0 u0))))

C

float code(float alpha, float u0) {
	return (-alpha * alpha) * logf((1.0f - u0));
}

Fortran

real(4) function code(alpha, u0)
    real(4), intent (in) :: alpha
    real(4), intent (in) :: u0
    code = (-alpha * alpha) * log((1.0e0 - u0))
end function

Julia

function code(alpha, u0)
	return Float32(Float32(Float32(-alpha) * alpha) * log(Float32(Float32(1.0) - u0)))
end

MATLAB

function tmp = code(alpha, u0)
	tmp = (-alpha * alpha) * log((single(1.0) - u0));
end

Alternative 1: 99.0% accurate, 1.0× speedup

Math

\[\begin{array}{l} \\ \left(0 - \alpha \cdot \alpha\right) \cdot \mathsf{log1p}\left(-u0\right) \end{array} \]

FPCore

(FPCore (alpha u0)
 :precision binary32
 (* (- 0.0 (* alpha alpha)) (log1p (- u0))))

C

float code(float alpha, float u0) {
	return (0.0f - (alpha * alpha)) * log1pf(-u0);
}

Julia

function code(alpha, u0)
	return Float32(Float32(Float32(0.0) - Float32(alpha * alpha)) * log1p(Float32(-u0)))
end

Derivation

1. Initial program 54.3%

   \[\left(\left(-\alpha\right) \cdot \alpha\right) \cdot \log \left(1 - u0\right) \]
2. Step-by-step derivation

   1. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\left(\left(\mathsf{neg}\left(\alpha\right)\right) \cdot \alpha\right), \color{blue}{\log \left(1 - u0\right)}\right) \]

   2. *-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(\left(\alpha \cdot \left(\mathsf{neg}\left(\alpha\right)\right)\right), \log \color{blue}{\left(1 - u0\right)}\right) \]

   3. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \left(\mathsf{neg}\left(\alpha\right)\right)\right), \log \color{blue}{\left(1 - u0\right)}\right) \]

   4. neg-lowering-neg.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \log \left(1 - \color{blue}{u0}\right)\right) \]

   5. sub-neg N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \log \left(1 + \left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   6. log1p-define N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \left(\mathsf{log1p}\left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   7. log1p-lowering-log1p.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{log1p.f32}\left(\left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   8. neg-lowering-neg.f32 99.2%

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

3. Simplified 99.2%

   \[\leadsto \color{blue}{\left(\alpha \cdot \left(-\alpha\right)\right) \cdot \mathsf{log1p}\left(-u0\right)} \]
4. Add Preprocessing

5. Final simplification 99.2%

   \[\leadsto \left(0 - \alpha \cdot \alpha\right) \cdot \mathsf{log1p}\left(-u0\right) \]
6. Add Preprocessing

Alternative 2: 93.5% accurate, 5.1× speedup

Math

\[\begin{array}{l} \\ u0 \cdot \left(\alpha \cdot \alpha + \left(\alpha \cdot u0\right) \cdot \left(\alpha \cdot \left(0.5 + u0 \cdot \left(u0 \cdot 0.25 + 0.3333333333333333\right)\right)\right)\right) \end{array} \]

FPCore

(FPCore (alpha u0)
 :precision binary32
 (*
  u0
  (+
   (* alpha alpha)
   (*
    (* alpha u0)
    (* alpha (+ 0.5 (* u0 (+ (* u0 0.25) 0.3333333333333333))))))))

C

float code(float alpha, float u0) {
	return u0 * ((alpha * alpha) + ((alpha * u0) * (alpha * (0.5f + (u0 * ((u0 * 0.25f) + 0.3333333333333333f))))));
}

Fortran

real(4) function code(alpha, u0)
    real(4), intent (in) :: alpha
    real(4), intent (in) :: u0
    code = u0 * ((alpha * alpha) + ((alpha * u0) * (alpha * (0.5e0 + (u0 * ((u0 * 0.25e0) + 0.3333333333333333e0))))))
end function

Julia

function code(alpha, u0)
	return Float32(u0 * Float32(Float32(alpha * alpha) + Float32(Float32(alpha * u0) * Float32(alpha * Float32(Float32(0.5) + Float32(u0 * Float32(Float32(u0 * Float32(0.25)) + Float32(0.3333333333333333))))))))
end

MATLAB

function tmp = code(alpha, u0)
	tmp = u0 * ((alpha * alpha) + ((alpha * u0) * (alpha * (single(0.5) + (u0 * ((u0 * single(0.25)) + single(0.3333333333333333)))))));
end

Derivation

1. Initial program 54.3%

   \[\left(\left(-\alpha\right) \cdot \alpha\right) \cdot \log \left(1 - u0\right) \]
2. Step-by-step derivation

   1. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\left(\left(\mathsf{neg}\left(\alpha\right)\right) \cdot \alpha\right), \color{blue}{\log \left(1 - u0\right)}\right) \]

   2. *-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(\left(\alpha \cdot \left(\mathsf{neg}\left(\alpha\right)\right)\right), \log \color{blue}{\left(1 - u0\right)}\right) \]

   3. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \left(\mathsf{neg}\left(\alpha\right)\right)\right), \log \color{blue}{\left(1 - u0\right)}\right) \]

   4. neg-lowering-neg.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \log \left(1 - \color{blue}{u0}\right)\right) \]

   5. sub-neg N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \log \left(1 + \left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   6. log1p-define N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \left(\mathsf{log1p}\left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   7. log1p-lowering-log1p.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{log1p.f32}\left(\left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   8. neg-lowering-neg.f32 99.2%

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

3. Simplified 99.2%

   \[\leadsto \color{blue}{\left(\alpha \cdot \left(-\alpha\right)\right) \cdot \mathsf{log1p}\left(-u0\right)} \]
4. Add Preprocessing

5. Taylor expanded in u0 around 0

   \[\leadsto \color{blue}{u0 \cdot \left(u0 \cdot \left(\frac{1}{2} \cdot {\alpha}^{2} + u0 \cdot \left(\frac{1}{4} \cdot \left({\alpha}^{2} \cdot u0\right) + \frac{1}{3} \cdot {\alpha}^{2}\right)\right) + {\alpha}^{2}\right)} \]
6. Step-by-step derivation

   1. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \color{blue}{\left(u0 \cdot \left(\frac{1}{2} \cdot {\alpha}^{2} + u0 \cdot \left(\frac{1}{4} \cdot \left({\alpha}^{2} \cdot u0\right) + \frac{1}{3} \cdot {\alpha}^{2}\right)\right) + {\alpha}^{2}\right)}\right) \]

   2. +-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \left({\alpha}^{2} + \color{blue}{u0 \cdot \left(\frac{1}{2} \cdot {\alpha}^{2} + u0 \cdot \left(\frac{1}{4} \cdot \left({\alpha}^{2} \cdot u0\right) + \frac{1}{3} \cdot {\alpha}^{2}\right)\right)}\right)\right) \]

   3. +-lowering-+.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\left({\alpha}^{2}\right), \color{blue}{\left(u0 \cdot \left(\frac{1}{2} \cdot {\alpha}^{2} + u0 \cdot \left(\frac{1}{4} \cdot \left({\alpha}^{2} \cdot u0\right) + \frac{1}{3} \cdot {\alpha}^{2}\right)\right)\right)}\right)\right) \]

   4. unpow2 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\left(\alpha \cdot \alpha\right), \left(\color{blue}{u0} \cdot \left(\frac{1}{2} \cdot {\alpha}^{2} + u0 \cdot \left(\frac{1}{4} \cdot \left({\alpha}^{2} \cdot u0\right) + \frac{1}{3} \cdot {\alpha}^{2}\right)\right)\right)\right)\right) \]

   5. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \left(\color{blue}{u0} \cdot \left(\frac{1}{2} \cdot {\alpha}^{2} + u0 \cdot \left(\frac{1}{4} \cdot \left({\alpha}^{2} \cdot u0\right) + \frac{1}{3} \cdot {\alpha}^{2}\right)\right)\right)\right)\right) \]

   6. +-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \left(u0 \cdot \left(u0 \cdot \left(\frac{1}{4} \cdot \left({\alpha}^{2} \cdot u0\right) + \frac{1}{3} \cdot {\alpha}^{2}\right) + \color{blue}{\frac{1}{2} \cdot {\alpha}^{2}}\right)\right)\right)\right) \]

   7. distribute-rgt-in N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \left(u0 \cdot \left(\left(\left(\frac{1}{4} \cdot \left({\alpha}^{2} \cdot u0\right)\right) \cdot u0 + \left(\frac{1}{3} \cdot {\alpha}^{2}\right) \cdot u0\right) + \color{blue}{\frac{1}{2}} \cdot {\alpha}^{2}\right)\right)\right)\right) \]

   8. associate-*r* N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \left(u0 \cdot \left(\left(\left(\frac{1}{4} \cdot \left({\alpha}^{2} \cdot u0\right)\right) \cdot u0 + \frac{1}{3} \cdot \left({\alpha}^{2} \cdot u0\right)\right) + \frac{1}{2} \cdot {\alpha}^{2}\right)\right)\right)\right) \]

   9. associate-+l+ N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \left(u0 \cdot \left(\left(\frac{1}{4} \cdot \left({\alpha}^{2} \cdot u0\right)\right) \cdot u0 + \color{blue}{\left(\frac{1}{3} \cdot \left({\alpha}^{2} \cdot u0\right) + \frac{1}{2} \cdot {\alpha}^{2}\right)}\right)\right)\right)\right) \]

   10. *-commutative N/A

       \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \left(u0 \cdot \left(u0 \cdot \left(\frac{1}{4} \cdot \left({\alpha}^{2} \cdot u0\right)\right) + \left(\color{blue}{\frac{1}{3} \cdot \left({\alpha}^{2} \cdot u0\right)} + \frac{1}{2} \cdot {\alpha}^{2}\right)\right)\right)\right)\right) \]

7. Simplified 94.3%

   \[\leadsto \color{blue}{u0 \cdot \left(\alpha \cdot \alpha + \left(u0 \cdot \left(\alpha \cdot \alpha\right)\right) \cdot \left(\left(u0 \cdot u0\right) \cdot 0.25 + \left(u0 \cdot 0.3333333333333333 + 0.5\right)\right)\right)} \]
8. Step-by-step derivation

   1. associate-*r* N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \left(\left(\left(u0 \cdot \alpha\right) \cdot \alpha\right) \cdot \left(\color{blue}{\left(u0 \cdot u0\right) \cdot \frac{1}{4}} + \left(u0 \cdot \frac{1}{3} + \frac{1}{2}\right)\right)\right)\right)\right) \]

   2. associate-*l* N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \left(\left(u0 \cdot \alpha\right) \cdot \color{blue}{\left(\alpha \cdot \left(\left(u0 \cdot u0\right) \cdot \frac{1}{4} + \left(u0 \cdot \frac{1}{3} + \frac{1}{2}\right)\right)\right)}\right)\right)\right) \]

   3. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \mathsf{*.f32}\left(\left(u0 \cdot \alpha\right), \color{blue}{\left(\alpha \cdot \left(\left(u0 \cdot u0\right) \cdot \frac{1}{4} + \left(u0 \cdot \frac{1}{3} + \frac{1}{2}\right)\right)\right)}\right)\right)\right) \]

   4. *-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \mathsf{*.f32}\left(\left(\alpha \cdot u0\right), \left(\color{blue}{\alpha} \cdot \left(\left(u0 \cdot u0\right) \cdot \frac{1}{4} + \left(u0 \cdot \frac{1}{3} + \frac{1}{2}\right)\right)\right)\right)\right)\right) \]

   5. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, u0\right), \left(\color{blue}{\alpha} \cdot \left(\left(u0 \cdot u0\right) \cdot \frac{1}{4} + \left(u0 \cdot \frac{1}{3} + \frac{1}{2}\right)\right)\right)\right)\right)\right) \]

   6. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, u0\right), \mathsf{*.f32}\left(\alpha, \color{blue}{\left(\left(u0 \cdot u0\right) \cdot \frac{1}{4} + \left(u0 \cdot \frac{1}{3} + \frac{1}{2}\right)\right)}\right)\right)\right)\right) \]

   7. associate-+r+ N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, u0\right), \mathsf{*.f32}\left(\alpha, \left(\left(\left(u0 \cdot u0\right) \cdot \frac{1}{4} + u0 \cdot \frac{1}{3}\right) + \color{blue}{\frac{1}{2}}\right)\right)\right)\right)\right) \]

   8. +-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, u0\right), \mathsf{*.f32}\left(\alpha, \left(\frac{1}{2} + \color{blue}{\left(\left(u0 \cdot u0\right) \cdot \frac{1}{4} + u0 \cdot \frac{1}{3}\right)}\right)\right)\right)\right)\right) \]

   9. +-lowering-+.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, u0\right), \mathsf{*.f32}\left(\alpha, \mathsf{+.f32}\left(\frac{1}{2}, \color{blue}{\left(\left(u0 \cdot u0\right) \cdot \frac{1}{4} + u0 \cdot \frac{1}{3}\right)}\right)\right)\right)\right)\right) \]

   10. associate-*l* N/A

       \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, u0\right), \mathsf{*.f32}\left(\alpha, \mathsf{+.f32}\left(\frac{1}{2}, \left(u0 \cdot \left(u0 \cdot \frac{1}{4}\right) + \color{blue}{u0} \cdot \frac{1}{3}\right)\right)\right)\right)\right)\right) \]

   11. distribute-lft-out N/A

       \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, u0\right), \mathsf{*.f32}\left(\alpha, \mathsf{+.f32}\left(\frac{1}{2}, \left(u0 \cdot \color{blue}{\left(u0 \cdot \frac{1}{4} + \frac{1}{3}\right)}\right)\right)\right)\right)\right)\right) \]

   12. *-lowering-*.f32 N/A

       \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, u0\right), \mathsf{*.f32}\left(\alpha, \mathsf{+.f32}\left(\frac{1}{2}, \mathsf{*.f32}\left(u0, \color{blue}{\left(u0 \cdot \frac{1}{4} + \frac{1}{3}\right)}\right)\right)\right)\right)\right)\right) \]

   13. +-lowering-+.f32 N/A

       \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, u0\right), \mathsf{*.f32}\left(\alpha, \mathsf{+.f32}\left(\frac{1}{2}, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\left(u0 \cdot \frac{1}{4}\right), \color{blue}{\frac{1}{3}}\right)\right)\right)\right)\right)\right)\right) \]

   14. *-lowering-*.f32 94.3%

       \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, u0\right), \mathsf{*.f32}\left(\alpha, \mathsf{+.f32}\left(\frac{1}{2}, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\mathsf{*.f32}\left(u0, \frac{1}{4}\right), \frac{1}{3}\right)\right)\right)\right)\right)\right)\right) \]

9. Applied egg-rr 94.3%

   \[\leadsto u0 \cdot \left(\alpha \cdot \alpha + \color{blue}{\left(\alpha \cdot u0\right) \cdot \left(\alpha \cdot \left(0.5 + u0 \cdot \left(u0 \cdot 0.25 + 0.3333333333333333\right)\right)\right)}\right) \]
10. Add Preprocessing

Alternative 3: 93.4% accurate, 5.7× speedup

Math

\[\begin{array}{l} \\ \left(\alpha \cdot \alpha\right) \cdot \left(u0 - u0 \cdot \left(u0 \cdot \left(-0.5 + u0 \cdot \left(-0.3333333333333333 + u0 \cdot -0.25\right)\right)\right)\right) \end{array} \]

FPCore

(FPCore (alpha u0)
 :precision binary32
 (*
  (* alpha alpha)
  (- u0 (* u0 (* u0 (+ -0.5 (* u0 (+ -0.3333333333333333 (* u0 -0.25)))))))))

C

float code(float alpha, float u0) {
	return (alpha * alpha) * (u0 - (u0 * (u0 * (-0.5f + (u0 * (-0.3333333333333333f + (u0 * -0.25f)))))));
}

Fortran

real(4) function code(alpha, u0)
    real(4), intent (in) :: alpha
    real(4), intent (in) :: u0
    code = (alpha * alpha) * (u0 - (u0 * (u0 * ((-0.5e0) + (u0 * ((-0.3333333333333333e0) + (u0 * (-0.25e0))))))))
end function

Julia

function code(alpha, u0)
	return Float32(Float32(alpha * alpha) * Float32(u0 - Float32(u0 * Float32(u0 * Float32(Float32(-0.5) + Float32(u0 * Float32(Float32(-0.3333333333333333) + Float32(u0 * Float32(-0.25)))))))))
end

MATLAB

function tmp = code(alpha, u0)
	tmp = (alpha * alpha) * (u0 - (u0 * (u0 * (single(-0.5) + (u0 * (single(-0.3333333333333333) + (u0 * single(-0.25))))))));
end

Derivation

1. Initial program 54.3%

   \[\left(\left(-\alpha\right) \cdot \alpha\right) \cdot \log \left(1 - u0\right) \]
2. Step-by-step derivation

   1. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\left(\left(\mathsf{neg}\left(\alpha\right)\right) \cdot \alpha\right), \color{blue}{\log \left(1 - u0\right)}\right) \]

   2. *-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(\left(\alpha \cdot \left(\mathsf{neg}\left(\alpha\right)\right)\right), \log \color{blue}{\left(1 - u0\right)}\right) \]

   3. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \left(\mathsf{neg}\left(\alpha\right)\right)\right), \log \color{blue}{\left(1 - u0\right)}\right) \]

   4. neg-lowering-neg.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \log \left(1 - \color{blue}{u0}\right)\right) \]

   5. sub-neg N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \log \left(1 + \left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   6. log1p-define N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \left(\mathsf{log1p}\left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   7. log1p-lowering-log1p.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{log1p.f32}\left(\left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   8. neg-lowering-neg.f32 99.2%

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

3. Simplified 99.2%

   \[\leadsto \color{blue}{\left(\alpha \cdot \left(-\alpha\right)\right) \cdot \mathsf{log1p}\left(-u0\right)} \]
4. Add Preprocessing

5. Taylor expanded in u0 around 0

   \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \color{blue}{\left(u0 \cdot \left(u0 \cdot \left(u0 \cdot \left(\frac{-1}{4} \cdot u0 - \frac{1}{3}\right) - \frac{1}{2}\right) - 1\right)\right)}\right) \]
6. Step-by-step derivation

   1. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \color{blue}{\left(u0 \cdot \left(u0 \cdot \left(\frac{-1}{4} \cdot u0 - \frac{1}{3}\right) - \frac{1}{2}\right) - 1\right)}\right)\right) \]

   2. sub-neg N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \left(u0 \cdot \left(u0 \cdot \left(\frac{-1}{4} \cdot u0 - \frac{1}{3}\right) - \frac{1}{2}\right) + \color{blue}{\left(\mathsf{neg}\left(1\right)\right)}\right)\right)\right) \]

   3. metadata-eval N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \left(u0 \cdot \left(u0 \cdot \left(\frac{-1}{4} \cdot u0 - \frac{1}{3}\right) - \frac{1}{2}\right) + -1\right)\right)\right) \]

   4. +-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \left(-1 + \color{blue}{u0 \cdot \left(u0 \cdot \left(\frac{-1}{4} \cdot u0 - \frac{1}{3}\right) - \frac{1}{2}\right)}\right)\right)\right) \]

   5. +-lowering-+.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(-1, \color{blue}{\left(u0 \cdot \left(u0 \cdot \left(\frac{-1}{4} \cdot u0 - \frac{1}{3}\right) - \frac{1}{2}\right)\right)}\right)\right)\right) \]

   6. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(-1, \mathsf{*.f32}\left(u0, \color{blue}{\left(u0 \cdot \left(\frac{-1}{4} \cdot u0 - \frac{1}{3}\right) - \frac{1}{2}\right)}\right)\right)\right)\right) \]

   7. sub-neg N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(-1, \mathsf{*.f32}\left(u0, \left(u0 \cdot \left(\frac{-1}{4} \cdot u0 - \frac{1}{3}\right) + \color{blue}{\left(\mathsf{neg}\left(\frac{1}{2}\right)\right)}\right)\right)\right)\right)\right) \]

   8. metadata-eval N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(-1, \mathsf{*.f32}\left(u0, \left(u0 \cdot \left(\frac{-1}{4} \cdot u0 - \frac{1}{3}\right) + \frac{-1}{2}\right)\right)\right)\right)\right) \]

   9. +-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(-1, \mathsf{*.f32}\left(u0, \left(\frac{-1}{2} + \color{blue}{u0 \cdot \left(\frac{-1}{4} \cdot u0 - \frac{1}{3}\right)}\right)\right)\right)\right)\right) \]

   10. +-lowering-+.f32 N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(-1, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{-1}{2}, \color{blue}{\left(u0 \cdot \left(\frac{-1}{4} \cdot u0 - \frac{1}{3}\right)\right)}\right)\right)\right)\right)\right) \]

   11. *-lowering-*.f32 N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(-1, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{-1}{2}, \mathsf{*.f32}\left(u0, \color{blue}{\left(\frac{-1}{4} \cdot u0 - \frac{1}{3}\right)}\right)\right)\right)\right)\right)\right) \]

   12. sub-neg N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(-1, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{-1}{2}, \mathsf{*.f32}\left(u0, \left(\frac{-1}{4} \cdot u0 + \color{blue}{\left(\mathsf{neg}\left(\frac{1}{3}\right)\right)}\right)\right)\right)\right)\right)\right)\right) \]

   13. metadata-eval N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(-1, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{-1}{2}, \mathsf{*.f32}\left(u0, \left(\frac{-1}{4} \cdot u0 + \frac{-1}{3}\right)\right)\right)\right)\right)\right)\right) \]

   14. +-commutative N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(-1, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{-1}{2}, \mathsf{*.f32}\left(u0, \left(\frac{-1}{3} + \color{blue}{\frac{-1}{4} \cdot u0}\right)\right)\right)\right)\right)\right)\right) \]

   15. +-lowering-+.f32 N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(-1, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{-1}{2}, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{-1}{3}, \color{blue}{\left(\frac{-1}{4} \cdot u0\right)}\right)\right)\right)\right)\right)\right)\right) \]

   16. *-commutative N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(-1, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{-1}{2}, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{-1}{3}, \left(u0 \cdot \color{blue}{\frac{-1}{4}}\right)\right)\right)\right)\right)\right)\right)\right) \]

   17. *-lowering-*.f32 94.1%

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(-1, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{-1}{2}, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{-1}{3}, \mathsf{*.f32}\left(u0, \color{blue}{\frac{-1}{4}}\right)\right)\right)\right)\right)\right)\right)\right) \]

7. Simplified 94.1%

   \[\leadsto \left(\alpha \cdot \left(-\alpha\right)\right) \cdot \color{blue}{\left(u0 \cdot \left(-1 + u0 \cdot \left(-0.5 + u0 \cdot \left(-0.3333333333333333 + u0 \cdot -0.25\right)\right)\right)\right)} \]
8. Step-by-step derivation

   1. +-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \left(u0 \cdot \left(u0 \cdot \left(\frac{-1}{2} + u0 \cdot \left(\frac{-1}{3} + u0 \cdot \frac{-1}{4}\right)\right) + \color{blue}{-1}\right)\right)\right) \]

   2. distribute-rgt-in N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \left(\left(u0 \cdot \left(\frac{-1}{2} + u0 \cdot \left(\frac{-1}{3} + u0 \cdot \frac{-1}{4}\right)\right)\right) \cdot u0 + \color{blue}{-1 \cdot u0}\right)\right) \]

   3. neg-mul-1 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \left(\left(u0 \cdot \left(\frac{-1}{2} + u0 \cdot \left(\frac{-1}{3} + u0 \cdot \frac{-1}{4}\right)\right)\right) \cdot u0 + \left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   4. +-lowering-+.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{+.f32}\left(\left(\left(u0 \cdot \left(\frac{-1}{2} + u0 \cdot \left(\frac{-1}{3} + u0 \cdot \frac{-1}{4}\right)\right)\right) \cdot u0\right), \color{blue}{\left(\mathsf{neg}\left(u0\right)\right)}\right)\right) \]

   5. *-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{+.f32}\left(\left(u0 \cdot \left(u0 \cdot \left(\frac{-1}{2} + u0 \cdot \left(\frac{-1}{3} + u0 \cdot \frac{-1}{4}\right)\right)\right)\right), \left(\mathsf{neg}\left(\color{blue}{u0}\right)\right)\right)\right) \]

   6. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{+.f32}\left(\mathsf{*.f32}\left(u0, \left(u0 \cdot \left(\frac{-1}{2} + u0 \cdot \left(\frac{-1}{3} + u0 \cdot \frac{-1}{4}\right)\right)\right)\right), \left(\mathsf{neg}\left(\color{blue}{u0}\right)\right)\right)\right) \]

   7. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{+.f32}\left(\mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(u0, \left(\frac{-1}{2} + u0 \cdot \left(\frac{-1}{3} + u0 \cdot \frac{-1}{4}\right)\right)\right)\right), \left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   8. +-lowering-+.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{+.f32}\left(\mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{-1}{2}, \left(u0 \cdot \left(\frac{-1}{3} + u0 \cdot \frac{-1}{4}\right)\right)\right)\right)\right), \left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   9. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{+.f32}\left(\mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{-1}{2}, \mathsf{*.f32}\left(u0, \left(\frac{-1}{3} + u0 \cdot \frac{-1}{4}\right)\right)\right)\right)\right), \left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   10. +-lowering-+.f32 N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{+.f32}\left(\mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{-1}{2}, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{-1}{3}, \left(u0 \cdot \frac{-1}{4}\right)\right)\right)\right)\right)\right), \left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   11. *-lowering-*.f32 N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{+.f32}\left(\mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{-1}{2}, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{-1}{3}, \mathsf{*.f32}\left(u0, \frac{-1}{4}\right)\right)\right)\right)\right)\right), \left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   12. neg-lowering-neg.f32 94.4%

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{+.f32}\left(\mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{-1}{2}, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{-1}{3}, \mathsf{*.f32}\left(u0, \frac{-1}{4}\right)\right)\right)\right)\right)\right), \mathsf{neg.f32}\left(u0\right)\right)\right) \]

9. Applied egg-rr 94.4%

   \[\leadsto \left(\alpha \cdot \left(-\alpha\right)\right) \cdot \color{blue}{\left(u0 \cdot \left(u0 \cdot \left(-0.5 + u0 \cdot \left(-0.3333333333333333 + u0 \cdot -0.25\right)\right)\right) + \left(-u0\right)\right)} \]

10. Final simplification 94.4%

    \[\leadsto \left(\alpha \cdot \alpha\right) \cdot \left(u0 - u0 \cdot \left(u0 \cdot \left(-0.5 + u0 \cdot \left(-0.3333333333333333 + u0 \cdot -0.25\right)\right)\right)\right) \]
11. Add Preprocessing

Alternative 4: 93.2% accurate, 5.7× speedup

Math

\[\begin{array}{l} \\ u0 \cdot \left(\alpha \cdot \left(\alpha \cdot \left(1 + u0 \cdot \left(0.5 + u0 \cdot \left(u0 \cdot 0.25 + 0.3333333333333333\right)\right)\right)\right)\right) \end{array} \]

FPCore

(FPCore (alpha u0)
 :precision binary32
 (*
  u0
  (*
   alpha
   (*
    alpha
    (+ 1.0 (* u0 (+ 0.5 (* u0 (+ (* u0 0.25) 0.3333333333333333)))))))))

C

float code(float alpha, float u0) {
	return u0 * (alpha * (alpha * (1.0f + (u0 * (0.5f + (u0 * ((u0 * 0.25f) + 0.3333333333333333f)))))));
}

Fortran

real(4) function code(alpha, u0)
    real(4), intent (in) :: alpha
    real(4), intent (in) :: u0
    code = u0 * (alpha * (alpha * (1.0e0 + (u0 * (0.5e0 + (u0 * ((u0 * 0.25e0) + 0.3333333333333333e0)))))))
end function

Julia

function code(alpha, u0)
	return Float32(u0 * Float32(alpha * Float32(alpha * Float32(Float32(1.0) + Float32(u0 * Float32(Float32(0.5) + Float32(u0 * Float32(Float32(u0 * Float32(0.25)) + Float32(0.3333333333333333)))))))))
end

MATLAB

function tmp = code(alpha, u0)
	tmp = u0 * (alpha * (alpha * (single(1.0) + (u0 * (single(0.5) + (u0 * ((u0 * single(0.25)) + single(0.3333333333333333))))))));
end

Derivation

1. Initial program 54.3%

   \[\left(\left(-\alpha\right) \cdot \alpha\right) \cdot \log \left(1 - u0\right) \]
2. Step-by-step derivation

   1. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\left(\left(\mathsf{neg}\left(\alpha\right)\right) \cdot \alpha\right), \color{blue}{\log \left(1 - u0\right)}\right) \]

   2. *-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(\left(\alpha \cdot \left(\mathsf{neg}\left(\alpha\right)\right)\right), \log \color{blue}{\left(1 - u0\right)}\right) \]

   3. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \left(\mathsf{neg}\left(\alpha\right)\right)\right), \log \color{blue}{\left(1 - u0\right)}\right) \]

   4. neg-lowering-neg.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \log \left(1 - \color{blue}{u0}\right)\right) \]

   5. sub-neg N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \log \left(1 + \left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   6. log1p-define N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \left(\mathsf{log1p}\left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   7. log1p-lowering-log1p.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{log1p.f32}\left(\left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   8. neg-lowering-neg.f32 99.2%

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

3. Simplified 99.2%

   \[\leadsto \color{blue}{\left(\alpha \cdot \left(-\alpha\right)\right) \cdot \mathsf{log1p}\left(-u0\right)} \]
4. Add Preprocessing

5. Taylor expanded in u0 around 0

   \[\leadsto \color{blue}{u0 \cdot \left(u0 \cdot \left(\frac{1}{2} \cdot {\alpha}^{2} + u0 \cdot \left(\frac{1}{4} \cdot \left({\alpha}^{2} \cdot u0\right) + \frac{1}{3} \cdot {\alpha}^{2}\right)\right) + {\alpha}^{2}\right)} \]
6. Step-by-step derivation

   1. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \color{blue}{\left(u0 \cdot \left(\frac{1}{2} \cdot {\alpha}^{2} + u0 \cdot \left(\frac{1}{4} \cdot \left({\alpha}^{2} \cdot u0\right) + \frac{1}{3} \cdot {\alpha}^{2}\right)\right) + {\alpha}^{2}\right)}\right) \]

   2. +-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \left({\alpha}^{2} + \color{blue}{u0 \cdot \left(\frac{1}{2} \cdot {\alpha}^{2} + u0 \cdot \left(\frac{1}{4} \cdot \left({\alpha}^{2} \cdot u0\right) + \frac{1}{3} \cdot {\alpha}^{2}\right)\right)}\right)\right) \]

   3. +-lowering-+.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\left({\alpha}^{2}\right), \color{blue}{\left(u0 \cdot \left(\frac{1}{2} \cdot {\alpha}^{2} + u0 \cdot \left(\frac{1}{4} \cdot \left({\alpha}^{2} \cdot u0\right) + \frac{1}{3} \cdot {\alpha}^{2}\right)\right)\right)}\right)\right) \]

   4. unpow2 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\left(\alpha \cdot \alpha\right), \left(\color{blue}{u0} \cdot \left(\frac{1}{2} \cdot {\alpha}^{2} + u0 \cdot \left(\frac{1}{4} \cdot \left({\alpha}^{2} \cdot u0\right) + \frac{1}{3} \cdot {\alpha}^{2}\right)\right)\right)\right)\right) \]

   5. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \left(\color{blue}{u0} \cdot \left(\frac{1}{2} \cdot {\alpha}^{2} + u0 \cdot \left(\frac{1}{4} \cdot \left({\alpha}^{2} \cdot u0\right) + \frac{1}{3} \cdot {\alpha}^{2}\right)\right)\right)\right)\right) \]

   6. +-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \left(u0 \cdot \left(u0 \cdot \left(\frac{1}{4} \cdot \left({\alpha}^{2} \cdot u0\right) + \frac{1}{3} \cdot {\alpha}^{2}\right) + \color{blue}{\frac{1}{2} \cdot {\alpha}^{2}}\right)\right)\right)\right) \]

   7. distribute-rgt-in N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \left(u0 \cdot \left(\left(\left(\frac{1}{4} \cdot \left({\alpha}^{2} \cdot u0\right)\right) \cdot u0 + \left(\frac{1}{3} \cdot {\alpha}^{2}\right) \cdot u0\right) + \color{blue}{\frac{1}{2}} \cdot {\alpha}^{2}\right)\right)\right)\right) \]

   8. associate-*r* N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \left(u0 \cdot \left(\left(\left(\frac{1}{4} \cdot \left({\alpha}^{2} \cdot u0\right)\right) \cdot u0 + \frac{1}{3} \cdot \left({\alpha}^{2} \cdot u0\right)\right) + \frac{1}{2} \cdot {\alpha}^{2}\right)\right)\right)\right) \]

   9. associate-+l+ N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \left(u0 \cdot \left(\left(\frac{1}{4} \cdot \left({\alpha}^{2} \cdot u0\right)\right) \cdot u0 + \color{blue}{\left(\frac{1}{3} \cdot \left({\alpha}^{2} \cdot u0\right) + \frac{1}{2} \cdot {\alpha}^{2}\right)}\right)\right)\right)\right) \]

   10. *-commutative N/A

       \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \left(u0 \cdot \left(u0 \cdot \left(\frac{1}{4} \cdot \left({\alpha}^{2} \cdot u0\right)\right) + \left(\color{blue}{\frac{1}{3} \cdot \left({\alpha}^{2} \cdot u0\right)} + \frac{1}{2} \cdot {\alpha}^{2}\right)\right)\right)\right)\right) \]

7. Simplified 94.3%

   \[\leadsto \color{blue}{u0 \cdot \left(\alpha \cdot \alpha + \left(u0 \cdot \left(\alpha \cdot \alpha\right)\right) \cdot \left(\left(u0 \cdot u0\right) \cdot 0.25 + \left(u0 \cdot 0.3333333333333333 + 0.5\right)\right)\right)} \]

8. Taylor expanded in alpha around 0

   \[\leadsto \mathsf{*.f32}\left(u0, \color{blue}{\left({\alpha}^{2} \cdot \left(1 + u0 \cdot \left(\frac{1}{2} + \left(\frac{1}{4} \cdot {u0}^{2} + \frac{1}{3} \cdot u0\right)\right)\right)\right)}\right) \]
9. Step-by-step derivation

   1. unpow2 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \left(\left(\alpha \cdot \alpha\right) \cdot \left(\color{blue}{1} + u0 \cdot \left(\frac{1}{2} + \left(\frac{1}{4} \cdot {u0}^{2} + \frac{1}{3} \cdot u0\right)\right)\right)\right)\right) \]

   2. associate-*l* N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \left(\alpha \cdot \color{blue}{\left(\alpha \cdot \left(1 + u0 \cdot \left(\frac{1}{2} + \left(\frac{1}{4} \cdot {u0}^{2} + \frac{1}{3} \cdot u0\right)\right)\right)\right)}\right)\right) \]

   3. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\alpha, \color{blue}{\left(\alpha \cdot \left(1 + u0 \cdot \left(\frac{1}{2} + \left(\frac{1}{4} \cdot {u0}^{2} + \frac{1}{3} \cdot u0\right)\right)\right)\right)}\right)\right) \]

   4. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\alpha, \mathsf{*.f32}\left(\alpha, \color{blue}{\left(1 + u0 \cdot \left(\frac{1}{2} + \left(\frac{1}{4} \cdot {u0}^{2} + \frac{1}{3} \cdot u0\right)\right)\right)}\right)\right)\right) \]

   5. +-lowering-+.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\alpha, \mathsf{*.f32}\left(\alpha, \mathsf{+.f32}\left(1, \color{blue}{\left(u0 \cdot \left(\frac{1}{2} + \left(\frac{1}{4} \cdot {u0}^{2} + \frac{1}{3} \cdot u0\right)\right)\right)}\right)\right)\right)\right) \]

   6. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\alpha, \mathsf{*.f32}\left(\alpha, \mathsf{+.f32}\left(1, \mathsf{*.f32}\left(u0, \color{blue}{\left(\frac{1}{2} + \left(\frac{1}{4} \cdot {u0}^{2} + \frac{1}{3} \cdot u0\right)\right)}\right)\right)\right)\right)\right) \]

   7. +-lowering-+.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\alpha, \mathsf{*.f32}\left(\alpha, \mathsf{+.f32}\left(1, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{1}{2}, \color{blue}{\left(\frac{1}{4} \cdot {u0}^{2} + \frac{1}{3} \cdot u0\right)}\right)\right)\right)\right)\right)\right) \]

   8. unpow2 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\alpha, \mathsf{*.f32}\left(\alpha, \mathsf{+.f32}\left(1, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{1}{2}, \left(\frac{1}{4} \cdot \left(u0 \cdot u0\right) + \frac{1}{3} \cdot u0\right)\right)\right)\right)\right)\right)\right) \]

   9. associate-*r* N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\alpha, \mathsf{*.f32}\left(\alpha, \mathsf{+.f32}\left(1, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{1}{2}, \left(\left(\frac{1}{4} \cdot u0\right) \cdot u0 + \color{blue}{\frac{1}{3}} \cdot u0\right)\right)\right)\right)\right)\right)\right) \]

   10. distribute-rgt-in N/A

       \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\alpha, \mathsf{*.f32}\left(\alpha, \mathsf{+.f32}\left(1, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{1}{2}, \left(u0 \cdot \color{blue}{\left(\frac{1}{4} \cdot u0 + \frac{1}{3}\right)}\right)\right)\right)\right)\right)\right)\right) \]

   11. +-commutative N/A

       \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\alpha, \mathsf{*.f32}\left(\alpha, \mathsf{+.f32}\left(1, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{1}{2}, \left(u0 \cdot \left(\frac{1}{3} + \color{blue}{\frac{1}{4} \cdot u0}\right)\right)\right)\right)\right)\right)\right)\right) \]

   12. *-lowering-*.f32 N/A

       \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\alpha, \mathsf{*.f32}\left(\alpha, \mathsf{+.f32}\left(1, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{1}{2}, \mathsf{*.f32}\left(u0, \color{blue}{\left(\frac{1}{3} + \frac{1}{4} \cdot u0\right)}\right)\right)\right)\right)\right)\right)\right) \]

   13. +-lowering-+.f32 N/A

       \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\alpha, \mathsf{*.f32}\left(\alpha, \mathsf{+.f32}\left(1, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{1}{2}, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{1}{3}, \color{blue}{\left(\frac{1}{4} \cdot u0\right)}\right)\right)\right)\right)\right)\right)\right)\right) \]

   14. *-commutative N/A

       \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\alpha, \mathsf{*.f32}\left(\alpha, \mathsf{+.f32}\left(1, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{1}{2}, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{1}{3}, \left(u0 \cdot \color{blue}{\frac{1}{4}}\right)\right)\right)\right)\right)\right)\right)\right)\right) \]

   15. *-lowering-*.f32 94.3%

       \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\alpha, \mathsf{*.f32}\left(\alpha, \mathsf{+.f32}\left(1, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{1}{2}, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{1}{3}, \mathsf{*.f32}\left(u0, \color{blue}{\frac{1}{4}}\right)\right)\right)\right)\right)\right)\right)\right)\right) \]

10. Simplified 94.3%

    \[\leadsto u0 \cdot \color{blue}{\left(\alpha \cdot \left(\alpha \cdot \left(1 + u0 \cdot \left(0.5 + u0 \cdot \left(0.3333333333333333 + u0 \cdot 0.25\right)\right)\right)\right)\right)} \]

11. Final simplification 94.3%

    \[\leadsto u0 \cdot \left(\alpha \cdot \left(\alpha \cdot \left(1 + u0 \cdot \left(0.5 + u0 \cdot \left(u0 \cdot 0.25 + 0.3333333333333333\right)\right)\right)\right)\right) \]
12. Add Preprocessing

Alternative 5: 91.4% accurate, 6.4× speedup

Math

\[\begin{array}{l} \\ u0 \cdot \left(\alpha \cdot \alpha + \left(u0 \cdot \left(\alpha \cdot \alpha\right)\right) \cdot \left(0.5 + u0 \cdot 0.3333333333333333\right)\right) \end{array} \]

FPCore

(FPCore (alpha u0)
 :precision binary32
 (*
  u0
  (+
   (* alpha alpha)
   (* (* u0 (* alpha alpha)) (+ 0.5 (* u0 0.3333333333333333))))))

C

float code(float alpha, float u0) {
	return u0 * ((alpha * alpha) + ((u0 * (alpha * alpha)) * (0.5f + (u0 * 0.3333333333333333f))));
}

Fortran

real(4) function code(alpha, u0)
    real(4), intent (in) :: alpha
    real(4), intent (in) :: u0
    code = u0 * ((alpha * alpha) + ((u0 * (alpha * alpha)) * (0.5e0 + (u0 * 0.3333333333333333e0))))
end function

Julia

function code(alpha, u0)
	return Float32(u0 * Float32(Float32(alpha * alpha) + Float32(Float32(u0 * Float32(alpha * alpha)) * Float32(Float32(0.5) + Float32(u0 * Float32(0.3333333333333333))))))
end

MATLAB

function tmp = code(alpha, u0)
	tmp = u0 * ((alpha * alpha) + ((u0 * (alpha * alpha)) * (single(0.5) + (u0 * single(0.3333333333333333)))));
end

Derivation

1. Initial program 54.3%

   \[\left(\left(-\alpha\right) \cdot \alpha\right) \cdot \log \left(1 - u0\right) \]
2. Step-by-step derivation

   1. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\left(\left(\mathsf{neg}\left(\alpha\right)\right) \cdot \alpha\right), \color{blue}{\log \left(1 - u0\right)}\right) \]

   2. *-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(\left(\alpha \cdot \left(\mathsf{neg}\left(\alpha\right)\right)\right), \log \color{blue}{\left(1 - u0\right)}\right) \]

   3. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \left(\mathsf{neg}\left(\alpha\right)\right)\right), \log \color{blue}{\left(1 - u0\right)}\right) \]

   4. neg-lowering-neg.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \log \left(1 - \color{blue}{u0}\right)\right) \]

   5. sub-neg N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \log \left(1 + \left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   6. log1p-define N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \left(\mathsf{log1p}\left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   7. log1p-lowering-log1p.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{log1p.f32}\left(\left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   8. neg-lowering-neg.f32 99.2%

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

3. Simplified 99.2%

   \[\leadsto \color{blue}{\left(\alpha \cdot \left(-\alpha\right)\right) \cdot \mathsf{log1p}\left(-u0\right)} \]
4. Add Preprocessing

5. Taylor expanded in u0 around 0

   \[\leadsto \color{blue}{u0 \cdot \left(u0 \cdot \left(\frac{1}{2} \cdot {\alpha}^{2} + u0 \cdot \left(\frac{1}{4} \cdot \left({\alpha}^{2} \cdot u0\right) + \frac{1}{3} \cdot {\alpha}^{2}\right)\right) + {\alpha}^{2}\right)} \]
6. Step-by-step derivation

   1. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \color{blue}{\left(u0 \cdot \left(\frac{1}{2} \cdot {\alpha}^{2} + u0 \cdot \left(\frac{1}{4} \cdot \left({\alpha}^{2} \cdot u0\right) + \frac{1}{3} \cdot {\alpha}^{2}\right)\right) + {\alpha}^{2}\right)}\right) \]

   2. +-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \left({\alpha}^{2} + \color{blue}{u0 \cdot \left(\frac{1}{2} \cdot {\alpha}^{2} + u0 \cdot \left(\frac{1}{4} \cdot \left({\alpha}^{2} \cdot u0\right) + \frac{1}{3} \cdot {\alpha}^{2}\right)\right)}\right)\right) \]

   3. +-lowering-+.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\left({\alpha}^{2}\right), \color{blue}{\left(u0 \cdot \left(\frac{1}{2} \cdot {\alpha}^{2} + u0 \cdot \left(\frac{1}{4} \cdot \left({\alpha}^{2} \cdot u0\right) + \frac{1}{3} \cdot {\alpha}^{2}\right)\right)\right)}\right)\right) \]

   4. unpow2 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\left(\alpha \cdot \alpha\right), \left(\color{blue}{u0} \cdot \left(\frac{1}{2} \cdot {\alpha}^{2} + u0 \cdot \left(\frac{1}{4} \cdot \left({\alpha}^{2} \cdot u0\right) + \frac{1}{3} \cdot {\alpha}^{2}\right)\right)\right)\right)\right) \]

   5. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \left(\color{blue}{u0} \cdot \left(\frac{1}{2} \cdot {\alpha}^{2} + u0 \cdot \left(\frac{1}{4} \cdot \left({\alpha}^{2} \cdot u0\right) + \frac{1}{3} \cdot {\alpha}^{2}\right)\right)\right)\right)\right) \]

   6. +-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \left(u0 \cdot \left(u0 \cdot \left(\frac{1}{4} \cdot \left({\alpha}^{2} \cdot u0\right) + \frac{1}{3} \cdot {\alpha}^{2}\right) + \color{blue}{\frac{1}{2} \cdot {\alpha}^{2}}\right)\right)\right)\right) \]

   7. distribute-rgt-in N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \left(u0 \cdot \left(\left(\left(\frac{1}{4} \cdot \left({\alpha}^{2} \cdot u0\right)\right) \cdot u0 + \left(\frac{1}{3} \cdot {\alpha}^{2}\right) \cdot u0\right) + \color{blue}{\frac{1}{2}} \cdot {\alpha}^{2}\right)\right)\right)\right) \]

   8. associate-*r* N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \left(u0 \cdot \left(\left(\left(\frac{1}{4} \cdot \left({\alpha}^{2} \cdot u0\right)\right) \cdot u0 + \frac{1}{3} \cdot \left({\alpha}^{2} \cdot u0\right)\right) + \frac{1}{2} \cdot {\alpha}^{2}\right)\right)\right)\right) \]

   9. associate-+l+ N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \left(u0 \cdot \left(\left(\frac{1}{4} \cdot \left({\alpha}^{2} \cdot u0\right)\right) \cdot u0 + \color{blue}{\left(\frac{1}{3} \cdot \left({\alpha}^{2} \cdot u0\right) + \frac{1}{2} \cdot {\alpha}^{2}\right)}\right)\right)\right)\right) \]

   10. *-commutative N/A

       \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \left(u0 \cdot \left(u0 \cdot \left(\frac{1}{4} \cdot \left({\alpha}^{2} \cdot u0\right)\right) + \left(\color{blue}{\frac{1}{3} \cdot \left({\alpha}^{2} \cdot u0\right)} + \frac{1}{2} \cdot {\alpha}^{2}\right)\right)\right)\right)\right) \]

7. Simplified 94.3%

   \[\leadsto \color{blue}{u0 \cdot \left(\alpha \cdot \alpha + \left(u0 \cdot \left(\alpha \cdot \alpha\right)\right) \cdot \left(\left(u0 \cdot u0\right) \cdot 0.25 + \left(u0 \cdot 0.3333333333333333 + 0.5\right)\right)\right)} \]

8. Taylor expanded in u0 around 0

   \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \mathsf{*.f32}\left(\mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\alpha, \alpha\right)\right), \color{blue}{\left(\frac{1}{2} + \frac{1}{3} \cdot u0\right)}\right)\right)\right) \]
9. Step-by-step derivation

   1. +-lowering-+.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \mathsf{*.f32}\left(\mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\alpha, \alpha\right)\right), \mathsf{+.f32}\left(\frac{1}{2}, \color{blue}{\left(\frac{1}{3} \cdot u0\right)}\right)\right)\right)\right) \]

   2. *-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \mathsf{*.f32}\left(\mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\alpha, \alpha\right)\right), \mathsf{+.f32}\left(\frac{1}{2}, \left(u0 \cdot \color{blue}{\frac{1}{3}}\right)\right)\right)\right)\right) \]

   3. *-lowering-*.f32 92.4%

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \mathsf{*.f32}\left(\mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\alpha, \alpha\right)\right), \mathsf{+.f32}\left(\frac{1}{2}, \mathsf{*.f32}\left(u0, \color{blue}{\frac{1}{3}}\right)\right)\right)\right)\right) \]

10. Simplified 92.4%

    \[\leadsto u0 \cdot \left(\alpha \cdot \alpha + \left(u0 \cdot \left(\alpha \cdot \alpha\right)\right) \cdot \color{blue}{\left(0.5 + u0 \cdot 0.3333333333333333\right)}\right) \]
11. Add Preprocessing

Alternative 6: 91.4% accurate, 7.2× speedup

Math

\[\begin{array}{l} \\ \left(\alpha \cdot \alpha\right) \cdot \left(u0 - u0 \cdot \left(u0 \cdot \left(-0.5 + u0 \cdot -0.3333333333333333\right)\right)\right) \end{array} \]

FPCore

(FPCore (alpha u0)
 :precision binary32
 (* (* alpha alpha) (- u0 (* u0 (* u0 (+ -0.5 (* u0 -0.3333333333333333)))))))

C

float code(float alpha, float u0) {
	return (alpha * alpha) * (u0 - (u0 * (u0 * (-0.5f + (u0 * -0.3333333333333333f)))));
}

Fortran

real(4) function code(alpha, u0)
    real(4), intent (in) :: alpha
    real(4), intent (in) :: u0
    code = (alpha * alpha) * (u0 - (u0 * (u0 * ((-0.5e0) + (u0 * (-0.3333333333333333e0))))))
end function

Julia

function code(alpha, u0)
	return Float32(Float32(alpha * alpha) * Float32(u0 - Float32(u0 * Float32(u0 * Float32(Float32(-0.5) + Float32(u0 * Float32(-0.3333333333333333)))))))
end

MATLAB

function tmp = code(alpha, u0)
	tmp = (alpha * alpha) * (u0 - (u0 * (u0 * (single(-0.5) + (u0 * single(-0.3333333333333333))))));
end

Derivation

1. Initial program 54.3%

   \[\left(\left(-\alpha\right) \cdot \alpha\right) \cdot \log \left(1 - u0\right) \]
2. Step-by-step derivation

   1. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\left(\left(\mathsf{neg}\left(\alpha\right)\right) \cdot \alpha\right), \color{blue}{\log \left(1 - u0\right)}\right) \]

   2. *-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(\left(\alpha \cdot \left(\mathsf{neg}\left(\alpha\right)\right)\right), \log \color{blue}{\left(1 - u0\right)}\right) \]

   3. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \left(\mathsf{neg}\left(\alpha\right)\right)\right), \log \color{blue}{\left(1 - u0\right)}\right) \]

   4. neg-lowering-neg.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \log \left(1 - \color{blue}{u0}\right)\right) \]

   5. sub-neg N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \log \left(1 + \left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   6. log1p-define N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \left(\mathsf{log1p}\left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   7. log1p-lowering-log1p.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{log1p.f32}\left(\left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   8. neg-lowering-neg.f32 99.2%

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

3. Simplified 99.2%

   \[\leadsto \color{blue}{\left(\alpha \cdot \left(-\alpha\right)\right) \cdot \mathsf{log1p}\left(-u0\right)} \]
4. Add Preprocessing

5. Taylor expanded in u0 around 0

   \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \color{blue}{\left(u0 \cdot \left(u0 \cdot \left(\frac{-1}{3} \cdot u0 - \frac{1}{2}\right) - 1\right)\right)}\right) \]
6. Step-by-step derivation

   1. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \color{blue}{\left(u0 \cdot \left(\frac{-1}{3} \cdot u0 - \frac{1}{2}\right) - 1\right)}\right)\right) \]

   2. sub-neg N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \left(u0 \cdot \left(\frac{-1}{3} \cdot u0 - \frac{1}{2}\right) + \color{blue}{\left(\mathsf{neg}\left(1\right)\right)}\right)\right)\right) \]

   3. metadata-eval N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \left(u0 \cdot \left(\frac{-1}{3} \cdot u0 - \frac{1}{2}\right) + -1\right)\right)\right) \]

   4. +-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \left(-1 + \color{blue}{u0 \cdot \left(\frac{-1}{3} \cdot u0 - \frac{1}{2}\right)}\right)\right)\right) \]

   5. +-lowering-+.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(-1, \color{blue}{\left(u0 \cdot \left(\frac{-1}{3} \cdot u0 - \frac{1}{2}\right)\right)}\right)\right)\right) \]

   6. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(-1, \mathsf{*.f32}\left(u0, \color{blue}{\left(\frac{-1}{3} \cdot u0 - \frac{1}{2}\right)}\right)\right)\right)\right) \]

   7. sub-neg N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(-1, \mathsf{*.f32}\left(u0, \left(\frac{-1}{3} \cdot u0 + \color{blue}{\left(\mathsf{neg}\left(\frac{1}{2}\right)\right)}\right)\right)\right)\right)\right) \]

   8. metadata-eval N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(-1, \mathsf{*.f32}\left(u0, \left(\frac{-1}{3} \cdot u0 + \frac{-1}{2}\right)\right)\right)\right)\right) \]

   9. +-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(-1, \mathsf{*.f32}\left(u0, \left(\frac{-1}{2} + \color{blue}{\frac{-1}{3} \cdot u0}\right)\right)\right)\right)\right) \]

   10. +-lowering-+.f32 N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(-1, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{-1}{2}, \color{blue}{\left(\frac{-1}{3} \cdot u0\right)}\right)\right)\right)\right)\right) \]

   11. *-commutative N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(-1, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{-1}{2}, \left(u0 \cdot \color{blue}{\frac{-1}{3}}\right)\right)\right)\right)\right)\right) \]

   12. *-lowering-*.f32 92.3%

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(-1, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{-1}{2}, \mathsf{*.f32}\left(u0, \color{blue}{\frac{-1}{3}}\right)\right)\right)\right)\right)\right) \]

7. Simplified 92.3%

   \[\leadsto \left(\alpha \cdot \left(-\alpha\right)\right) \cdot \color{blue}{\left(u0 \cdot \left(-1 + u0 \cdot \left(-0.5 + u0 \cdot -0.3333333333333333\right)\right)\right)} \]

9. Applied egg-rr 92.5%

   \[\leadsto \left(\alpha \cdot \left(-\alpha\right)\right) \cdot \color{blue}{\left(0 - \left(u0 - u0 \cdot \left(u0 \cdot \left(-0.5 + u0 \cdot -0.3333333333333333\right)\right)\right)\right)} \]

10. Final simplification 92.5%

    \[\leadsto \left(\alpha \cdot \alpha\right) \cdot \left(u0 - u0 \cdot \left(u0 \cdot \left(-0.5 + u0 \cdot -0.3333333333333333\right)\right)\right) \]
11. Add Preprocessing

Alternative 7: 91.4% accurate, 7.2× speedup

Math

\[\begin{array}{l} \\ \alpha \cdot \left(\alpha \cdot \left(u0 - u0 \cdot \left(u0 \cdot \left(-0.5 + u0 \cdot -0.3333333333333333\right)\right)\right)\right) \end{array} \]

FPCore

(FPCore (alpha u0)
 :precision binary32
 (* alpha (* alpha (- u0 (* u0 (* u0 (+ -0.5 (* u0 -0.3333333333333333))))))))

C

float code(float alpha, float u0) {
	return alpha * (alpha * (u0 - (u0 * (u0 * (-0.5f + (u0 * -0.3333333333333333f))))));
}

Fortran

real(4) function code(alpha, u0)
    real(4), intent (in) :: alpha
    real(4), intent (in) :: u0
    code = alpha * (alpha * (u0 - (u0 * (u0 * ((-0.5e0) + (u0 * (-0.3333333333333333e0)))))))
end function

Julia

function code(alpha, u0)
	return Float32(alpha * Float32(alpha * Float32(u0 - Float32(u0 * Float32(u0 * Float32(Float32(-0.5) + Float32(u0 * Float32(-0.3333333333333333))))))))
end

MATLAB

function tmp = code(alpha, u0)
	tmp = alpha * (alpha * (u0 - (u0 * (u0 * (single(-0.5) + (u0 * single(-0.3333333333333333)))))));
end

Derivation

1. Initial program 54.3%

   \[\left(\left(-\alpha\right) \cdot \alpha\right) \cdot \log \left(1 - u0\right) \]
2. Step-by-step derivation

   1. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\left(\left(\mathsf{neg}\left(\alpha\right)\right) \cdot \alpha\right), \color{blue}{\log \left(1 - u0\right)}\right) \]

   2. *-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(\left(\alpha \cdot \left(\mathsf{neg}\left(\alpha\right)\right)\right), \log \color{blue}{\left(1 - u0\right)}\right) \]

   3. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \left(\mathsf{neg}\left(\alpha\right)\right)\right), \log \color{blue}{\left(1 - u0\right)}\right) \]

   4. neg-lowering-neg.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \log \left(1 - \color{blue}{u0}\right)\right) \]

   5. sub-neg N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \log \left(1 + \left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   6. log1p-define N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \left(\mathsf{log1p}\left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   7. log1p-lowering-log1p.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{log1p.f32}\left(\left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   8. neg-lowering-neg.f32 99.2%

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

3. Simplified 99.2%

   \[\leadsto \color{blue}{\left(\alpha \cdot \left(-\alpha\right)\right) \cdot \mathsf{log1p}\left(-u0\right)} \]
4. Add Preprocessing

5. Taylor expanded in u0 around 0

   \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \color{blue}{\left(u0 \cdot \left(u0 \cdot \left(\frac{-1}{3} \cdot u0 - \frac{1}{2}\right) - 1\right)\right)}\right) \]
6. Step-by-step derivation

   1. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \color{blue}{\left(u0 \cdot \left(\frac{-1}{3} \cdot u0 - \frac{1}{2}\right) - 1\right)}\right)\right) \]

   2. sub-neg N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \left(u0 \cdot \left(\frac{-1}{3} \cdot u0 - \frac{1}{2}\right) + \color{blue}{\left(\mathsf{neg}\left(1\right)\right)}\right)\right)\right) \]

   3. metadata-eval N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \left(u0 \cdot \left(\frac{-1}{3} \cdot u0 - \frac{1}{2}\right) + -1\right)\right)\right) \]

   4. +-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \left(-1 + \color{blue}{u0 \cdot \left(\frac{-1}{3} \cdot u0 - \frac{1}{2}\right)}\right)\right)\right) \]

   5. +-lowering-+.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(-1, \color{blue}{\left(u0 \cdot \left(\frac{-1}{3} \cdot u0 - \frac{1}{2}\right)\right)}\right)\right)\right) \]

   6. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(-1, \mathsf{*.f32}\left(u0, \color{blue}{\left(\frac{-1}{3} \cdot u0 - \frac{1}{2}\right)}\right)\right)\right)\right) \]

   7. sub-neg N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(-1, \mathsf{*.f32}\left(u0, \left(\frac{-1}{3} \cdot u0 + \color{blue}{\left(\mathsf{neg}\left(\frac{1}{2}\right)\right)}\right)\right)\right)\right)\right) \]

   8. metadata-eval N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(-1, \mathsf{*.f32}\left(u0, \left(\frac{-1}{3} \cdot u0 + \frac{-1}{2}\right)\right)\right)\right)\right) \]

   9. +-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(-1, \mathsf{*.f32}\left(u0, \left(\frac{-1}{2} + \color{blue}{\frac{-1}{3} \cdot u0}\right)\right)\right)\right)\right) \]

   10. +-lowering-+.f32 N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(-1, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{-1}{2}, \color{blue}{\left(\frac{-1}{3} \cdot u0\right)}\right)\right)\right)\right)\right) \]

   11. *-commutative N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(-1, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{-1}{2}, \left(u0 \cdot \color{blue}{\frac{-1}{3}}\right)\right)\right)\right)\right)\right) \]

   12. *-lowering-*.f32 92.3%

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(-1, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{-1}{2}, \mathsf{*.f32}\left(u0, \color{blue}{\frac{-1}{3}}\right)\right)\right)\right)\right)\right) \]

7. Simplified 92.3%

   \[\leadsto \left(\alpha \cdot \left(-\alpha\right)\right) \cdot \color{blue}{\left(u0 \cdot \left(-1 + u0 \cdot \left(-0.5 + u0 \cdot -0.3333333333333333\right)\right)\right)} \]
8. Step-by-step derivation

   1. *-commutative N/A

      \[\leadsto \left(u0 \cdot \left(-1 + u0 \cdot \left(\frac{-1}{2} + u0 \cdot \frac{-1}{3}\right)\right)\right) \cdot \color{blue}{\left(\alpha \cdot \left(\mathsf{neg}\left(\alpha\right)\right)\right)} \]

   2. associate-*r* N/A

      \[\leadsto \left(\left(u0 \cdot \left(-1 + u0 \cdot \left(\frac{-1}{2} + u0 \cdot \frac{-1}{3}\right)\right)\right) \cdot \alpha\right) \cdot \color{blue}{\left(\mathsf{neg}\left(\alpha\right)\right)} \]

   3. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\left(\left(u0 \cdot \left(-1 + u0 \cdot \left(\frac{-1}{2} + u0 \cdot \frac{-1}{3}\right)\right)\right) \cdot \alpha\right), \color{blue}{\left(\mathsf{neg}\left(\alpha\right)\right)}\right) \]

   4. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\left(u0 \cdot \left(-1 + u0 \cdot \left(\frac{-1}{2} + u0 \cdot \frac{-1}{3}\right)\right)\right), \alpha\right), \left(\mathsf{neg}\left(\color{blue}{\alpha}\right)\right)\right) \]

   5. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\mathsf{*.f32}\left(u0, \left(-1 + u0 \cdot \left(\frac{-1}{2} + u0 \cdot \frac{-1}{3}\right)\right)\right), \alpha\right), \left(\mathsf{neg}\left(\alpha\right)\right)\right) \]

   6. +-lowering-+.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(-1, \left(u0 \cdot \left(\frac{-1}{2} + u0 \cdot \frac{-1}{3}\right)\right)\right)\right), \alpha\right), \left(\mathsf{neg}\left(\alpha\right)\right)\right) \]

   7. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(-1, \mathsf{*.f32}\left(u0, \left(\frac{-1}{2} + u0 \cdot \frac{-1}{3}\right)\right)\right)\right), \alpha\right), \left(\mathsf{neg}\left(\alpha\right)\right)\right) \]

   8. +-lowering-+.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(-1, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{-1}{2}, \left(u0 \cdot \frac{-1}{3}\right)\right)\right)\right)\right), \alpha\right), \left(\mathsf{neg}\left(\alpha\right)\right)\right) \]

   9. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(-1, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{-1}{2}, \mathsf{*.f32}\left(u0, \frac{-1}{3}\right)\right)\right)\right)\right), \alpha\right), \left(\mathsf{neg}\left(\alpha\right)\right)\right) \]

   10. neg-lowering-neg.f32 92.2%

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(-1, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{-1}{2}, \mathsf{*.f32}\left(u0, \frac{-1}{3}\right)\right)\right)\right)\right), \alpha\right), \mathsf{neg.f32}\left(\alpha\right)\right) \]

9. Applied egg-rr 92.2%

   \[\leadsto \color{blue}{\left(\left(u0 \cdot \left(-1 + u0 \cdot \left(-0.5 + u0 \cdot -0.3333333333333333\right)\right)\right) \cdot \alpha\right) \cdot \left(-\alpha\right)} \]
10. Step-by-step derivation

    1. +-commutative N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\left(u0 \cdot \left(u0 \cdot \left(\frac{-1}{2} + u0 \cdot \frac{-1}{3}\right) + -1\right)\right), \alpha\right), \mathsf{neg.f32}\left(\alpha\right)\right) \]

    2. distribute-rgt-in N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\left(\left(u0 \cdot \left(\frac{-1}{2} + u0 \cdot \frac{-1}{3}\right)\right) \cdot u0 + -1 \cdot u0\right), \alpha\right), \mathsf{neg.f32}\left(\alpha\right)\right) \]

    3. neg-mul-1 N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\left(\left(u0 \cdot \left(\frac{-1}{2} + u0 \cdot \frac{-1}{3}\right)\right) \cdot u0 + \left(\mathsf{neg}\left(u0\right)\right)\right), \alpha\right), \mathsf{neg.f32}\left(\alpha\right)\right) \]

    4. +-lowering-+.f32 N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\mathsf{+.f32}\left(\left(\left(u0 \cdot \left(\frac{-1}{2} + u0 \cdot \frac{-1}{3}\right)\right) \cdot u0\right), \left(\mathsf{neg}\left(u0\right)\right)\right), \alpha\right), \mathsf{neg.f32}\left(\alpha\right)\right) \]

    5. *-commutative N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\mathsf{+.f32}\left(\left(u0 \cdot \left(u0 \cdot \left(\frac{-1}{2} + u0 \cdot \frac{-1}{3}\right)\right)\right), \left(\mathsf{neg}\left(u0\right)\right)\right), \alpha\right), \mathsf{neg.f32}\left(\alpha\right)\right) \]

    6. *-lowering-*.f32 N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\mathsf{+.f32}\left(\mathsf{*.f32}\left(u0, \left(u0 \cdot \left(\frac{-1}{2} + u0 \cdot \frac{-1}{3}\right)\right)\right), \left(\mathsf{neg}\left(u0\right)\right)\right), \alpha\right), \mathsf{neg.f32}\left(\alpha\right)\right) \]

    7. *-lowering-*.f32 N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\mathsf{+.f32}\left(\mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(u0, \left(\frac{-1}{2} + u0 \cdot \frac{-1}{3}\right)\right)\right), \left(\mathsf{neg}\left(u0\right)\right)\right), \alpha\right), \mathsf{neg.f32}\left(\alpha\right)\right) \]

    8. +-lowering-+.f32 N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\mathsf{+.f32}\left(\mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{-1}{2}, \left(u0 \cdot \frac{-1}{3}\right)\right)\right)\right), \left(\mathsf{neg}\left(u0\right)\right)\right), \alpha\right), \mathsf{neg.f32}\left(\alpha\right)\right) \]

    9. *-lowering-*.f32 N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\mathsf{+.f32}\left(\mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{-1}{2}, \mathsf{*.f32}\left(u0, \frac{-1}{3}\right)\right)\right)\right), \left(\mathsf{neg}\left(u0\right)\right)\right), \alpha\right), \mathsf{neg.f32}\left(\alpha\right)\right) \]

    10. neg-lowering-neg.f32 92.5%

        \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\mathsf{+.f32}\left(\mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\frac{-1}{2}, \mathsf{*.f32}\left(u0, \frac{-1}{3}\right)\right)\right)\right), \mathsf{neg.f32}\left(u0\right)\right), \alpha\right), \mathsf{neg.f32}\left(\alpha\right)\right) \]

11. Applied egg-rr 92.5%

    \[\leadsto \left(\color{blue}{\left(u0 \cdot \left(u0 \cdot \left(-0.5 + u0 \cdot -0.3333333333333333\right)\right) + \left(-u0\right)\right)} \cdot \alpha\right) \cdot \left(-\alpha\right) \]

12. Final simplification 92.5%

    \[\leadsto \alpha \cdot \left(\alpha \cdot \left(u0 - u0 \cdot \left(u0 \cdot \left(-0.5 + u0 \cdot -0.3333333333333333\right)\right)\right)\right) \]
13. Add Preprocessing

Alternative 8: 91.4% accurate, 7.2× speedup

Math

\[\begin{array}{l} \\ \alpha \cdot \left(u0 \cdot \left(\alpha + u0 \cdot \left(\alpha \cdot \left(0.5 + u0 \cdot 0.3333333333333333\right)\right)\right)\right) \end{array} \]

FPCore

(FPCore (alpha u0)
 :precision binary32
 (* alpha (* u0 (+ alpha (* u0 (* alpha (+ 0.5 (* u0 0.3333333333333333))))))))

C

float code(float alpha, float u0) {
	return alpha * (u0 * (alpha + (u0 * (alpha * (0.5f + (u0 * 0.3333333333333333f))))));
}

Fortran

real(4) function code(alpha, u0)
    real(4), intent (in) :: alpha
    real(4), intent (in) :: u0
    code = alpha * (u0 * (alpha + (u0 * (alpha * (0.5e0 + (u0 * 0.3333333333333333e0))))))
end function

Julia

function code(alpha, u0)
	return Float32(alpha * Float32(u0 * Float32(alpha + Float32(u0 * Float32(alpha * Float32(Float32(0.5) + Float32(u0 * Float32(0.3333333333333333))))))))
end

MATLAB

function tmp = code(alpha, u0)
	tmp = alpha * (u0 * (alpha + (u0 * (alpha * (single(0.5) + (u0 * single(0.3333333333333333)))))));
end

Derivation

1. Initial program 54.3%

   \[\left(\left(-\alpha\right) \cdot \alpha\right) \cdot \log \left(1 - u0\right) \]
2. Step-by-step derivation

   1. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\left(\left(\mathsf{neg}\left(\alpha\right)\right) \cdot \alpha\right), \color{blue}{\log \left(1 - u0\right)}\right) \]

   2. *-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(\left(\alpha \cdot \left(\mathsf{neg}\left(\alpha\right)\right)\right), \log \color{blue}{\left(1 - u0\right)}\right) \]

   3. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \left(\mathsf{neg}\left(\alpha\right)\right)\right), \log \color{blue}{\left(1 - u0\right)}\right) \]

   4. neg-lowering-neg.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \log \left(1 - \color{blue}{u0}\right)\right) \]

   5. sub-neg N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \log \left(1 + \left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   6. log1p-define N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \left(\mathsf{log1p}\left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   7. log1p-lowering-log1p.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{log1p.f32}\left(\left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   8. neg-lowering-neg.f32 99.2%

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

3. Simplified 99.2%

   \[\leadsto \color{blue}{\left(\alpha \cdot \left(-\alpha\right)\right) \cdot \mathsf{log1p}\left(-u0\right)} \]
4. Add Preprocessing
5. Step-by-step derivation

   1. neg-sub0 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \left(0 - \alpha\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

   2. flip3-- N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \left(\frac{{0}^{3} - {\alpha}^{3}}{0 \cdot 0 + \left(\alpha \cdot \alpha + 0 \cdot \alpha\right)}\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

   3. metadata-eval N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \left(\frac{{0}^{3} - {\alpha}^{3}}{0 + \left(\alpha \cdot \alpha + 0 \cdot \alpha\right)}\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

   4. +-lft-identity N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \left(\frac{{0}^{3} - {\alpha}^{3}}{\alpha \cdot \alpha + 0 \cdot \alpha}\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

   5. distribute-rgt-out N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \left(\frac{{0}^{3} - {\alpha}^{3}}{\alpha \cdot \left(\alpha + 0\right)}\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

   6. +-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \left(\frac{{0}^{3} - {\alpha}^{3}}{\alpha \cdot \left(0 + \alpha\right)}\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

   7. +-lft-identity N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \left(\frac{{0}^{3} - {\alpha}^{3}}{\alpha \cdot \alpha}\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

   8. /-lowering-/.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{/.f32}\left(\left({0}^{3} - {\alpha}^{3}\right), \left(\alpha \cdot \alpha\right)\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

   9. metadata-eval N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{/.f32}\left(\left(0 - {\alpha}^{3}\right), \left(\alpha \cdot \alpha\right)\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

   10. sub0-neg N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{/.f32}\left(\left(\mathsf{neg}\left({\alpha}^{3}\right)\right), \left(\alpha \cdot \alpha\right)\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

   11. neg-lowering-neg.f32 N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{/.f32}\left(\mathsf{neg.f32}\left(\left({\alpha}^{3}\right)\right), \left(\alpha \cdot \alpha\right)\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

   12. cube-mult N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{/.f32}\left(\mathsf{neg.f32}\left(\left(\alpha \cdot \left(\alpha \cdot \alpha\right)\right)\right), \left(\alpha \cdot \alpha\right)\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

   13. *-lowering-*.f32 N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{/.f32}\left(\mathsf{neg.f32}\left(\mathsf{*.f32}\left(\alpha, \left(\alpha \cdot \alpha\right)\right)\right), \left(\alpha \cdot \alpha\right)\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

   14. *-lowering-*.f32 N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{/.f32}\left(\mathsf{neg.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{*.f32}\left(\alpha, \alpha\right)\right)\right), \left(\alpha \cdot \alpha\right)\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

   15. *-lowering-*.f32 98.9%

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{/.f32}\left(\mathsf{neg.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{*.f32}\left(\alpha, \alpha\right)\right)\right), \mathsf{*.f32}\left(\alpha, \alpha\right)\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

6. Applied egg-rr 98.9%

   \[\leadsto \left(\alpha \cdot \color{blue}{\frac{-\alpha \cdot \left(\alpha \cdot \alpha\right)}{\alpha \cdot \alpha}}\right) \cdot \mathsf{log1p}\left(-u0\right) \]
7. Step-by-step derivation

   1. cube-unmult N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{/.f32}\left(\mathsf{neg.f32}\left(\left({\alpha}^{3}\right)\right), \mathsf{*.f32}\left(\alpha, \alpha\right)\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

   2. pow-lowering-pow.f32 98.9%

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{/.f32}\left(\mathsf{neg.f32}\left(\mathsf{pow.f32}\left(\alpha, 3\right)\right), \mathsf{*.f32}\left(\alpha, \alpha\right)\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

8. Applied egg-rr 98.9%

   \[\leadsto \left(\alpha \cdot \frac{-\color{blue}{{\alpha}^{3}}}{\alpha \cdot \alpha}\right) \cdot \mathsf{log1p}\left(-u0\right) \]
9. Step-by-step derivation

   1. associate-*l* N/A

      \[\leadsto \alpha \cdot \color{blue}{\left(\frac{\mathsf{neg}\left({\alpha}^{3}\right)}{\alpha \cdot \alpha} \cdot \log \left(1 + \left(\mathsf{neg}\left(u0\right)\right)\right)\right)} \]

   2. *-commutative N/A

      \[\leadsto \left(\frac{\mathsf{neg}\left({\alpha}^{3}\right)}{\alpha \cdot \alpha} \cdot \log \left(1 + \left(\mathsf{neg}\left(u0\right)\right)\right)\right) \cdot \color{blue}{\alpha} \]

   3. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\left(\frac{\mathsf{neg}\left({\alpha}^{3}\right)}{\alpha \cdot \alpha} \cdot \log \left(1 + \left(\mathsf{neg}\left(u0\right)\right)\right)\right), \color{blue}{\alpha}\right) \]

   4. *-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(\left(\log \left(1 + \left(\mathsf{neg}\left(u0\right)\right)\right) \cdot \frac{\mathsf{neg}\left({\alpha}^{3}\right)}{\alpha \cdot \alpha}\right), \alpha\right) \]

   5. distribute-frac-neg N/A

      \[\leadsto \mathsf{*.f32}\left(\left(\log \left(1 + \left(\mathsf{neg}\left(u0\right)\right)\right) \cdot \left(\mathsf{neg}\left(\frac{{\alpha}^{3}}{\alpha \cdot \alpha}\right)\right)\right), \alpha\right) \]

   6. pow2 N/A

      \[\leadsto \mathsf{*.f32}\left(\left(\log \left(1 + \left(\mathsf{neg}\left(u0\right)\right)\right) \cdot \left(\mathsf{neg}\left(\frac{{\alpha}^{3}}{{\alpha}^{2}}\right)\right)\right), \alpha\right) \]

   7. pow-div N/A

      \[\leadsto \mathsf{*.f32}\left(\left(\log \left(1 + \left(\mathsf{neg}\left(u0\right)\right)\right) \cdot \left(\mathsf{neg}\left({\alpha}^{\left(3 - 2\right)}\right)\right)\right), \alpha\right) \]

   8. metadata-eval N/A

      \[\leadsto \mathsf{*.f32}\left(\left(\log \left(1 + \left(\mathsf{neg}\left(u0\right)\right)\right) \cdot \left(\mathsf{neg}\left({\alpha}^{1}\right)\right)\right), \alpha\right) \]

   9. unpow1 N/A

      \[\leadsto \mathsf{*.f32}\left(\left(\log \left(1 + \left(\mathsf{neg}\left(u0\right)\right)\right) \cdot \left(\mathsf{neg}\left(\alpha\right)\right)\right), \alpha\right) \]

   10. *-lowering-*.f32 N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\log \left(1 + \left(\mathsf{neg}\left(u0\right)\right)\right), \left(\mathsf{neg}\left(\alpha\right)\right)\right), \alpha\right) \]

   11. log1p-define N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\left(\mathsf{log1p}\left(\mathsf{neg}\left(u0\right)\right)\right), \left(\mathsf{neg}\left(\alpha\right)\right)\right), \alpha\right) \]

   12. log1p-lowering-log1p.f32 N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\mathsf{log1p.f32}\left(\left(\mathsf{neg}\left(u0\right)\right)\right), \left(\mathsf{neg}\left(\alpha\right)\right)\right), \alpha\right) \]

   13. neg-lowering-neg.f32 N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right), \left(\mathsf{neg}\left(\alpha\right)\right)\right), \alpha\right) \]

   14. neg-lowering-neg.f32 99.1%

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right), \mathsf{neg.f32}\left(\alpha\right)\right), \alpha\right) \]

10. Applied egg-rr 99.1%

    \[\leadsto \color{blue}{\left(\mathsf{log1p}\left(-u0\right) \cdot \left(-\alpha\right)\right) \cdot \alpha} \]

11. Taylor expanded in u0 around 0

    \[\leadsto \mathsf{*.f32}\left(\color{blue}{\left(u0 \cdot \left(\alpha + u0 \cdot \left(\frac{1}{3} \cdot \left(\alpha \cdot u0\right) + \frac{1}{2} \cdot \alpha\right)\right)\right)}, \alpha\right) \]
12. Step-by-step derivation

    1. *-lowering-*.f32 N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(u0, \left(\alpha + u0 \cdot \left(\frac{1}{3} \cdot \left(\alpha \cdot u0\right) + \frac{1}{2} \cdot \alpha\right)\right)\right), \alpha\right) \]

    2. +-lowering-+.f32 N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\alpha, \left(u0 \cdot \left(\frac{1}{3} \cdot \left(\alpha \cdot u0\right) + \frac{1}{2} \cdot \alpha\right)\right)\right)\right), \alpha\right) \]

    3. *-lowering-*.f32 N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\alpha, \mathsf{*.f32}\left(u0, \left(\frac{1}{3} \cdot \left(\alpha \cdot u0\right) + \frac{1}{2} \cdot \alpha\right)\right)\right)\right), \alpha\right) \]

    4. +-commutative N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\alpha, \mathsf{*.f32}\left(u0, \left(\frac{1}{2} \cdot \alpha + \frac{1}{3} \cdot \left(\alpha \cdot u0\right)\right)\right)\right)\right), \alpha\right) \]

    5. *-commutative N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\alpha, \mathsf{*.f32}\left(u0, \left(\frac{1}{2} \cdot \alpha + \frac{1}{3} \cdot \left(u0 \cdot \alpha\right)\right)\right)\right)\right), \alpha\right) \]

    6. associate-*r* N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\alpha, \mathsf{*.f32}\left(u0, \left(\frac{1}{2} \cdot \alpha + \left(\frac{1}{3} \cdot u0\right) \cdot \alpha\right)\right)\right)\right), \alpha\right) \]

    7. distribute-rgt-out N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\alpha, \mathsf{*.f32}\left(u0, \left(\alpha \cdot \left(\frac{1}{2} + \frac{1}{3} \cdot u0\right)\right)\right)\right)\right), \alpha\right) \]

    8. *-lowering-*.f32 N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\alpha, \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\alpha, \left(\frac{1}{2} + \frac{1}{3} \cdot u0\right)\right)\right)\right)\right), \alpha\right) \]

    9. +-lowering-+.f32 N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\alpha, \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\alpha, \mathsf{+.f32}\left(\frac{1}{2}, \left(\frac{1}{3} \cdot u0\right)\right)\right)\right)\right)\right), \alpha\right) \]

    10. *-commutative N/A

        \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\alpha, \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\alpha, \mathsf{+.f32}\left(\frac{1}{2}, \left(u0 \cdot \frac{1}{3}\right)\right)\right)\right)\right)\right), \alpha\right) \]

    11. *-lowering-*.f32 92.4%

        \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\alpha, \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\alpha, \mathsf{+.f32}\left(\frac{1}{2}, \mathsf{*.f32}\left(u0, \frac{1}{3}\right)\right)\right)\right)\right)\right), \alpha\right) \]

13. Simplified 92.4%

    \[\leadsto \color{blue}{\left(u0 \cdot \left(\alpha + u0 \cdot \left(\alpha \cdot \left(0.5 + u0 \cdot 0.3333333333333333\right)\right)\right)\right)} \cdot \alpha \]

14. Final simplification 92.4%

    \[\leadsto \alpha \cdot \left(u0 \cdot \left(\alpha + u0 \cdot \left(\alpha \cdot \left(0.5 + u0 \cdot 0.3333333333333333\right)\right)\right)\right) \]
15. Add Preprocessing

Alternative 9: 91.2% accurate, 7.2× speedup

Math

\[\begin{array}{l} \\ u0 \cdot \left(\alpha \cdot \left(\alpha \cdot \left(1 + u0 \cdot \left(0.5 + u0 \cdot 0.3333333333333333\right)\right)\right)\right) \end{array} \]

FPCore

(FPCore (alpha u0)
 :precision binary32
 (* u0 (* alpha (* alpha (+ 1.0 (* u0 (+ 0.5 (* u0 0.3333333333333333))))))))

C

float code(float alpha, float u0) {
	return u0 * (alpha * (alpha * (1.0f + (u0 * (0.5f + (u0 * 0.3333333333333333f))))));
}

Fortran

real(4) function code(alpha, u0)
    real(4), intent (in) :: alpha
    real(4), intent (in) :: u0
    code = u0 * (alpha * (alpha * (1.0e0 + (u0 * (0.5e0 + (u0 * 0.3333333333333333e0))))))
end function

Julia

function code(alpha, u0)
	return Float32(u0 * Float32(alpha * Float32(alpha * Float32(Float32(1.0) + Float32(u0 * Float32(Float32(0.5) + Float32(u0 * Float32(0.3333333333333333))))))))
end

MATLAB

function tmp = code(alpha, u0)
	tmp = u0 * (alpha * (alpha * (single(1.0) + (u0 * (single(0.5) + (u0 * single(0.3333333333333333)))))));
end

Derivation

1. Initial program 54.3%

   \[\left(\left(-\alpha\right) \cdot \alpha\right) \cdot \log \left(1 - u0\right) \]
2. Step-by-step derivation

   1. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\left(\left(\mathsf{neg}\left(\alpha\right)\right) \cdot \alpha\right), \color{blue}{\log \left(1 - u0\right)}\right) \]

   2. *-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(\left(\alpha \cdot \left(\mathsf{neg}\left(\alpha\right)\right)\right), \log \color{blue}{\left(1 - u0\right)}\right) \]

   3. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \left(\mathsf{neg}\left(\alpha\right)\right)\right), \log \color{blue}{\left(1 - u0\right)}\right) \]

   4. neg-lowering-neg.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \log \left(1 - \color{blue}{u0}\right)\right) \]

   5. sub-neg N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \log \left(1 + \left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   6. log1p-define N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \left(\mathsf{log1p}\left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   7. log1p-lowering-log1p.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{log1p.f32}\left(\left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   8. neg-lowering-neg.f32 99.2%

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

3. Simplified 99.2%

   \[\leadsto \color{blue}{\left(\alpha \cdot \left(-\alpha\right)\right) \cdot \mathsf{log1p}\left(-u0\right)} \]
4. Add Preprocessing

5. Taylor expanded in u0 around 0

   \[\leadsto \color{blue}{u0 \cdot \left(u0 \cdot \left(\frac{1}{3} \cdot \left({\alpha}^{2} \cdot u0\right) + \frac{1}{2} \cdot {\alpha}^{2}\right) + {\alpha}^{2}\right)} \]
6. Step-by-step derivation

   1. distribute-rgt-in N/A

      \[\leadsto u0 \cdot \left(\left(\left(\frac{1}{3} \cdot \left({\alpha}^{2} \cdot u0\right)\right) \cdot u0 + \left(\frac{1}{2} \cdot {\alpha}^{2}\right) \cdot u0\right) + {\color{blue}{\alpha}}^{2}\right) \]

   2. associate-*r* N/A

      \[\leadsto u0 \cdot \left(\left(\left(\frac{1}{3} \cdot \left({\alpha}^{2} \cdot u0\right)\right) \cdot u0 + \frac{1}{2} \cdot \left({\alpha}^{2} \cdot u0\right)\right) + {\alpha}^{2}\right) \]

   3. associate-+l+ N/A

      \[\leadsto u0 \cdot \left(\left(\frac{1}{3} \cdot \left({\alpha}^{2} \cdot u0\right)\right) \cdot u0 + \color{blue}{\left(\frac{1}{2} \cdot \left({\alpha}^{2} \cdot u0\right) + {\alpha}^{2}\right)}\right) \]

   4. *-commutative N/A

      \[\leadsto u0 \cdot \left(u0 \cdot \left(\frac{1}{3} \cdot \left({\alpha}^{2} \cdot u0\right)\right) + \left(\color{blue}{\frac{1}{2} \cdot \left({\alpha}^{2} \cdot u0\right)} + {\alpha}^{2}\right)\right) \]

   5. distribute-lft-in N/A

      \[\leadsto u0 \cdot \left(u0 \cdot \left(\frac{1}{3} \cdot \left({\alpha}^{2} \cdot u0\right)\right)\right) + \color{blue}{u0 \cdot \left(\frac{1}{2} \cdot \left({\alpha}^{2} \cdot u0\right) + {\alpha}^{2}\right)} \]

   6. associate-*r* N/A

      \[\leadsto u0 \cdot \left(\left(u0 \cdot \frac{1}{3}\right) \cdot \left({\alpha}^{2} \cdot u0\right)\right) + u0 \cdot \left(\frac{1}{2} \cdot \left({\alpha}^{2} \cdot u0\right) + {\alpha}^{2}\right) \]

   7. associate-*r* N/A

      \[\leadsto \left(u0 \cdot \left(u0 \cdot \frac{1}{3}\right)\right) \cdot \left({\alpha}^{2} \cdot u0\right) + \color{blue}{u0} \cdot \left(\frac{1}{2} \cdot \left({\alpha}^{2} \cdot u0\right) + {\alpha}^{2}\right) \]

   8. distribute-rgt-in N/A

      \[\leadsto \left(u0 \cdot \left(u0 \cdot \frac{1}{3}\right)\right) \cdot \left({\alpha}^{2} \cdot u0\right) + \left(\left(\frac{1}{2} \cdot \left({\alpha}^{2} \cdot u0\right)\right) \cdot u0 + \color{blue}{{\alpha}^{2} \cdot u0}\right) \]

   9. *-commutative N/A

      \[\leadsto \left(u0 \cdot \left(u0 \cdot \frac{1}{3}\right)\right) \cdot \left({\alpha}^{2} \cdot u0\right) + \left(u0 \cdot \left(\frac{1}{2} \cdot \left({\alpha}^{2} \cdot u0\right)\right) + \color{blue}{{\alpha}^{2}} \cdot u0\right) \]

   10. associate-*r* N/A

       \[\leadsto \left(u0 \cdot \left(u0 \cdot \frac{1}{3}\right)\right) \cdot \left({\alpha}^{2} \cdot u0\right) + \left(\left(u0 \cdot \frac{1}{2}\right) \cdot \left({\alpha}^{2} \cdot u0\right) + \color{blue}{{\alpha}^{2}} \cdot u0\right) \]

   11. distribute-lft1-in N/A

       \[\leadsto \left(u0 \cdot \left(u0 \cdot \frac{1}{3}\right)\right) \cdot \left({\alpha}^{2} \cdot u0\right) + \left(u0 \cdot \frac{1}{2} + 1\right) \cdot \color{blue}{\left({\alpha}^{2} \cdot u0\right)} \]

   12. distribute-rgt-out N/A

       \[\leadsto \left({\alpha}^{2} \cdot u0\right) \cdot \color{blue}{\left(u0 \cdot \left(u0 \cdot \frac{1}{3}\right) + \left(u0 \cdot \frac{1}{2} + 1\right)\right)} \]

7. Simplified 92.2%

   \[\leadsto \color{blue}{\left(u0 \cdot \left(\alpha \cdot \alpha\right)\right) \cdot \left(0.3333333333333333 \cdot \left(u0 \cdot u0\right) + \left(u0 \cdot 0.5 + 1\right)\right)} \]
8. Step-by-step derivation

   1. associate-*l* N/A

      \[\leadsto u0 \cdot \color{blue}{\left(\left(\alpha \cdot \alpha\right) \cdot \left(\frac{1}{3} \cdot \left(u0 \cdot u0\right) + \left(u0 \cdot \frac{1}{2} + 1\right)\right)\right)} \]

   2. *-commutative N/A

      \[\leadsto \left(\left(\alpha \cdot \alpha\right) \cdot \left(\frac{1}{3} \cdot \left(u0 \cdot u0\right) + \left(u0 \cdot \frac{1}{2} + 1\right)\right)\right) \cdot \color{blue}{u0} \]

   3. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\left(\left(\alpha \cdot \alpha\right) \cdot \left(\frac{1}{3} \cdot \left(u0 \cdot u0\right) + \left(u0 \cdot \frac{1}{2} + 1\right)\right)\right), \color{blue}{u0}\right) \]

   4. associate-*l* N/A

      \[\leadsto \mathsf{*.f32}\left(\left(\alpha \cdot \left(\alpha \cdot \left(\frac{1}{3} \cdot \left(u0 \cdot u0\right) + \left(u0 \cdot \frac{1}{2} + 1\right)\right)\right)\right), u0\right) \]

   5. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \left(\alpha \cdot \left(\frac{1}{3} \cdot \left(u0 \cdot u0\right) + \left(u0 \cdot \frac{1}{2} + 1\right)\right)\right)\right), u0\right) \]

   6. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{*.f32}\left(\alpha, \left(\frac{1}{3} \cdot \left(u0 \cdot u0\right) + \left(u0 \cdot \frac{1}{2} + 1\right)\right)\right)\right), u0\right) \]

   7. associate-+r+ N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{*.f32}\left(\alpha, \left(\left(\frac{1}{3} \cdot \left(u0 \cdot u0\right) + u0 \cdot \frac{1}{2}\right) + 1\right)\right)\right), u0\right) \]

   8. +-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{*.f32}\left(\alpha, \left(1 + \left(\frac{1}{3} \cdot \left(u0 \cdot u0\right) + u0 \cdot \frac{1}{2}\right)\right)\right)\right), u0\right) \]

   9. +-lowering-+.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{*.f32}\left(\alpha, \mathsf{+.f32}\left(1, \left(\frac{1}{3} \cdot \left(u0 \cdot u0\right) + u0 \cdot \frac{1}{2}\right)\right)\right)\right), u0\right) \]

   10. associate-*r* N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{*.f32}\left(\alpha, \mathsf{+.f32}\left(1, \left(\left(\frac{1}{3} \cdot u0\right) \cdot u0 + u0 \cdot \frac{1}{2}\right)\right)\right)\right), u0\right) \]

   11. *-commutative N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{*.f32}\left(\alpha, \mathsf{+.f32}\left(1, \left(\left(\frac{1}{3} \cdot u0\right) \cdot u0 + \frac{1}{2} \cdot u0\right)\right)\right)\right), u0\right) \]

   12. distribute-rgt-out N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{*.f32}\left(\alpha, \mathsf{+.f32}\left(1, \left(u0 \cdot \left(\frac{1}{3} \cdot u0 + \frac{1}{2}\right)\right)\right)\right)\right), u0\right) \]

   13. *-lowering-*.f32 N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{*.f32}\left(\alpha, \mathsf{+.f32}\left(1, \mathsf{*.f32}\left(u0, \left(\frac{1}{3} \cdot u0 + \frac{1}{2}\right)\right)\right)\right)\right), u0\right) \]

   14. +-lowering-+.f32 N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{*.f32}\left(\alpha, \mathsf{+.f32}\left(1, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\left(\frac{1}{3} \cdot u0\right), \frac{1}{2}\right)\right)\right)\right)\right), u0\right) \]

   15. *-commutative N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{*.f32}\left(\alpha, \mathsf{+.f32}\left(1, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\left(u0 \cdot \frac{1}{3}\right), \frac{1}{2}\right)\right)\right)\right)\right), u0\right) \]

   16. *-lowering-*.f32 92.3%

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{*.f32}\left(\alpha, \mathsf{+.f32}\left(1, \mathsf{*.f32}\left(u0, \mathsf{+.f32}\left(\mathsf{*.f32}\left(u0, \frac{1}{3}\right), \frac{1}{2}\right)\right)\right)\right)\right), u0\right) \]

9. Applied egg-rr 92.3%

   \[\leadsto \color{blue}{\left(\alpha \cdot \left(\alpha \cdot \left(1 + u0 \cdot \left(u0 \cdot 0.3333333333333333 + 0.5\right)\right)\right)\right) \cdot u0} \]

10. Final simplification 92.3%

    \[\leadsto u0 \cdot \left(\alpha \cdot \left(\alpha \cdot \left(1 + u0 \cdot \left(0.5 + u0 \cdot 0.3333333333333333\right)\right)\right)\right) \]
11. Add Preprocessing

Alternative 10: 87.3% accurate, 9.8× speedup

Math

\[\begin{array}{l} \\ u0 \cdot \left(\alpha \cdot \left(\alpha + \alpha \cdot \left(u0 \cdot 0.5\right)\right)\right) \end{array} \]

FPCore

(FPCore (alpha u0)
 :precision binary32
 (* u0 (* alpha (+ alpha (* alpha (* u0 0.5))))))

C

float code(float alpha, float u0) {
	return u0 * (alpha * (alpha + (alpha * (u0 * 0.5f))));
}

Fortran

real(4) function code(alpha, u0)
    real(4), intent (in) :: alpha
    real(4), intent (in) :: u0
    code = u0 * (alpha * (alpha + (alpha * (u0 * 0.5e0))))
end function

Julia

function code(alpha, u0)
	return Float32(u0 * Float32(alpha * Float32(alpha + Float32(alpha * Float32(u0 * Float32(0.5))))))
end

MATLAB

function tmp = code(alpha, u0)
	tmp = u0 * (alpha * (alpha + (alpha * (u0 * single(0.5)))));
end

Derivation

1. Initial program 54.3%

   \[\left(\left(-\alpha\right) \cdot \alpha\right) \cdot \log \left(1 - u0\right) \]
2. Step-by-step derivation

   1. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\left(\left(\mathsf{neg}\left(\alpha\right)\right) \cdot \alpha\right), \color{blue}{\log \left(1 - u0\right)}\right) \]

   2. *-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(\left(\alpha \cdot \left(\mathsf{neg}\left(\alpha\right)\right)\right), \log \color{blue}{\left(1 - u0\right)}\right) \]

   3. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \left(\mathsf{neg}\left(\alpha\right)\right)\right), \log \color{blue}{\left(1 - u0\right)}\right) \]

   4. neg-lowering-neg.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \log \left(1 - \color{blue}{u0}\right)\right) \]

   5. sub-neg N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \log \left(1 + \left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   6. log1p-define N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \left(\mathsf{log1p}\left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   7. log1p-lowering-log1p.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{log1p.f32}\left(\left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   8. neg-lowering-neg.f32 99.2%

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

3. Simplified 99.2%

   \[\leadsto \color{blue}{\left(\alpha \cdot \left(-\alpha\right)\right) \cdot \mathsf{log1p}\left(-u0\right)} \]
4. Add Preprocessing

5. Taylor expanded in u0 around 0

   \[\leadsto \color{blue}{u0 \cdot \left(\frac{1}{2} \cdot \left({\alpha}^{2} \cdot u0\right) + {\alpha}^{2}\right)} \]
6. Step-by-step derivation

   1. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \color{blue}{\left(\frac{1}{2} \cdot \left({\alpha}^{2} \cdot u0\right) + {\alpha}^{2}\right)}\right) \]

   2. *-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \left(\frac{1}{2} \cdot \left(u0 \cdot {\alpha}^{2}\right) + {\alpha}^{2}\right)\right) \]

   3. associate-*r* N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \left(\left(\frac{1}{2} \cdot u0\right) \cdot {\alpha}^{2} + {\color{blue}{\alpha}}^{2}\right)\right) \]

   4. distribute-lft1-in N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \left(\left(\frac{1}{2} \cdot u0 + 1\right) \cdot \color{blue}{{\alpha}^{2}}\right)\right) \]

   5. *-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \left(\left(u0 \cdot \frac{1}{2} + 1\right) \cdot {\alpha}^{2}\right)\right) \]

   6. unpow2 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \left(\left(u0 \cdot \frac{1}{2} + 1\right) \cdot \left(\alpha \cdot \color{blue}{\alpha}\right)\right)\right) \]

   7. associate-*r* N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \left(\left(\left(u0 \cdot \frac{1}{2} + 1\right) \cdot \alpha\right) \cdot \color{blue}{\alpha}\right)\right) \]

   8. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\left(\left(u0 \cdot \frac{1}{2} + 1\right) \cdot \alpha\right), \color{blue}{\alpha}\right)\right) \]

   9. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\mathsf{*.f32}\left(\left(u0 \cdot \frac{1}{2} + 1\right), \alpha\right), \alpha\right)\right) \]

   10. *-commutative N/A

       \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\mathsf{*.f32}\left(\left(\frac{1}{2} \cdot u0 + 1\right), \alpha\right), \alpha\right)\right) \]

   11. +-lowering-+.f32 N/A

       \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\mathsf{*.f32}\left(\mathsf{+.f32}\left(\left(\frac{1}{2} \cdot u0\right), 1\right), \alpha\right), \alpha\right)\right) \]

   12. *-commutative N/A

       \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\mathsf{*.f32}\left(\mathsf{+.f32}\left(\left(u0 \cdot \frac{1}{2}\right), 1\right), \alpha\right), \alpha\right)\right) \]

   13. *-lowering-*.f32 88.7%

       \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\mathsf{*.f32}\left(\mathsf{+.f32}\left(\mathsf{*.f32}\left(u0, \frac{1}{2}\right), 1\right), \alpha\right), \alpha\right)\right) \]

7. Simplified 88.7%

   \[\leadsto \color{blue}{u0 \cdot \left(\left(\left(u0 \cdot 0.5 + 1\right) \cdot \alpha\right) \cdot \alpha\right)} \]
8. Step-by-step derivation

   1. *-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\left(\alpha \cdot \left(u0 \cdot \frac{1}{2} + 1\right)\right), \alpha\right)\right) \]

   2. distribute-rgt-in N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\left(\left(u0 \cdot \frac{1}{2}\right) \cdot \alpha + 1 \cdot \alpha\right), \alpha\right)\right) \]

   3. +-lowering-+.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\mathsf{+.f32}\left(\left(\left(u0 \cdot \frac{1}{2}\right) \cdot \alpha\right), \left(1 \cdot \alpha\right)\right), \alpha\right)\right) \]

   4. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\mathsf{+.f32}\left(\mathsf{*.f32}\left(\left(u0 \cdot \frac{1}{2}\right), \alpha\right), \left(1 \cdot \alpha\right)\right), \alpha\right)\right) \]

   5. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\mathsf{+.f32}\left(\mathsf{*.f32}\left(\mathsf{*.f32}\left(u0, \frac{1}{2}\right), \alpha\right), \left(1 \cdot \alpha\right)\right), \alpha\right)\right) \]

   6. *-lowering-*.f32 88.8%

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\mathsf{+.f32}\left(\mathsf{*.f32}\left(\mathsf{*.f32}\left(u0, \frac{1}{2}\right), \alpha\right), \mathsf{*.f32}\left(1, \alpha\right)\right), \alpha\right)\right) \]

9. Applied egg-rr 88.8%

   \[\leadsto u0 \cdot \left(\color{blue}{\left(\left(u0 \cdot 0.5\right) \cdot \alpha + 1 \cdot \alpha\right)} \cdot \alpha\right) \]

10. Final simplification 88.8%

    \[\leadsto u0 \cdot \left(\alpha \cdot \left(\alpha + \alpha \cdot \left(u0 \cdot 0.5\right)\right)\right) \]
11. Add Preprocessing

Alternative 11: 87.1% accurate, 9.8× speedup

Math

\[\begin{array}{l} \\ u0 \cdot \left(\alpha \cdot \left(\alpha \cdot \left(1 + u0 \cdot 0.5\right)\right)\right) \end{array} \]

FPCore

(FPCore (alpha u0)
 :precision binary32
 (* u0 (* alpha (* alpha (+ 1.0 (* u0 0.5))))))

C

float code(float alpha, float u0) {
	return u0 * (alpha * (alpha * (1.0f + (u0 * 0.5f))));
}

Fortran

real(4) function code(alpha, u0)
    real(4), intent (in) :: alpha
    real(4), intent (in) :: u0
    code = u0 * (alpha * (alpha * (1.0e0 + (u0 * 0.5e0))))
end function

Julia

function code(alpha, u0)
	return Float32(u0 * Float32(alpha * Float32(alpha * Float32(Float32(1.0) + Float32(u0 * Float32(0.5))))))
end

MATLAB

function tmp = code(alpha, u0)
	tmp = u0 * (alpha * (alpha * (single(1.0) + (u0 * single(0.5)))));
end

Derivation

1. Initial program 54.3%

   \[\left(\left(-\alpha\right) \cdot \alpha\right) \cdot \log \left(1 - u0\right) \]
2. Step-by-step derivation

   1. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\left(\left(\mathsf{neg}\left(\alpha\right)\right) \cdot \alpha\right), \color{blue}{\log \left(1 - u0\right)}\right) \]

   2. *-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(\left(\alpha \cdot \left(\mathsf{neg}\left(\alpha\right)\right)\right), \log \color{blue}{\left(1 - u0\right)}\right) \]

   3. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \left(\mathsf{neg}\left(\alpha\right)\right)\right), \log \color{blue}{\left(1 - u0\right)}\right) \]

   4. neg-lowering-neg.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \log \left(1 - \color{blue}{u0}\right)\right) \]

   5. sub-neg N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \log \left(1 + \left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   6. log1p-define N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \left(\mathsf{log1p}\left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   7. log1p-lowering-log1p.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{log1p.f32}\left(\left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   8. neg-lowering-neg.f32 99.2%

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

3. Simplified 99.2%

   \[\leadsto \color{blue}{\left(\alpha \cdot \left(-\alpha\right)\right) \cdot \mathsf{log1p}\left(-u0\right)} \]
4. Add Preprocessing

5. Taylor expanded in u0 around 0

   \[\leadsto \color{blue}{u0 \cdot \left(\frac{1}{2} \cdot \left({\alpha}^{2} \cdot u0\right) + {\alpha}^{2}\right)} \]
6. Step-by-step derivation

   1. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \color{blue}{\left(\frac{1}{2} \cdot \left({\alpha}^{2} \cdot u0\right) + {\alpha}^{2}\right)}\right) \]

   2. *-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \left(\frac{1}{2} \cdot \left(u0 \cdot {\alpha}^{2}\right) + {\alpha}^{2}\right)\right) \]

   3. associate-*r* N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \left(\left(\frac{1}{2} \cdot u0\right) \cdot {\alpha}^{2} + {\color{blue}{\alpha}}^{2}\right)\right) \]

   4. distribute-lft1-in N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \left(\left(\frac{1}{2} \cdot u0 + 1\right) \cdot \color{blue}{{\alpha}^{2}}\right)\right) \]

   5. *-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \left(\left(u0 \cdot \frac{1}{2} + 1\right) \cdot {\alpha}^{2}\right)\right) \]

   6. unpow2 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \left(\left(u0 \cdot \frac{1}{2} + 1\right) \cdot \left(\alpha \cdot \color{blue}{\alpha}\right)\right)\right) \]

   7. associate-*r* N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \left(\left(\left(u0 \cdot \frac{1}{2} + 1\right) \cdot \alpha\right) \cdot \color{blue}{\alpha}\right)\right) \]

   8. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\left(\left(u0 \cdot \frac{1}{2} + 1\right) \cdot \alpha\right), \color{blue}{\alpha}\right)\right) \]

   9. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\mathsf{*.f32}\left(\left(u0 \cdot \frac{1}{2} + 1\right), \alpha\right), \alpha\right)\right) \]

   10. *-commutative N/A

       \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\mathsf{*.f32}\left(\left(\frac{1}{2} \cdot u0 + 1\right), \alpha\right), \alpha\right)\right) \]

   11. +-lowering-+.f32 N/A

       \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\mathsf{*.f32}\left(\mathsf{+.f32}\left(\left(\frac{1}{2} \cdot u0\right), 1\right), \alpha\right), \alpha\right)\right) \]

   12. *-commutative N/A

       \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\mathsf{*.f32}\left(\mathsf{+.f32}\left(\left(u0 \cdot \frac{1}{2}\right), 1\right), \alpha\right), \alpha\right)\right) \]

   13. *-lowering-*.f32 88.7%

       \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\mathsf{*.f32}\left(\mathsf{+.f32}\left(\mathsf{*.f32}\left(u0, \frac{1}{2}\right), 1\right), \alpha\right), \alpha\right)\right) \]

7. Simplified 88.7%

   \[\leadsto \color{blue}{u0 \cdot \left(\left(\left(u0 \cdot 0.5 + 1\right) \cdot \alpha\right) \cdot \alpha\right)} \]

8. Final simplification 88.7%

   \[\leadsto u0 \cdot \left(\alpha \cdot \left(\alpha \cdot \left(1 + u0 \cdot 0.5\right)\right)\right) \]
9. Add Preprocessing

Alternative 12: 87.2% accurate, 9.8× speedup

Math

\[\begin{array}{l} \\ u0 \cdot \left(\left(\alpha \cdot \alpha\right) \cdot \left(1 + u0 \cdot 0.5\right)\right) \end{array} \]

FPCore

(FPCore (alpha u0)
 :precision binary32
 (* u0 (* (* alpha alpha) (+ 1.0 (* u0 0.5)))))

C

float code(float alpha, float u0) {
	return u0 * ((alpha * alpha) * (1.0f + (u0 * 0.5f)));
}

Fortran

real(4) function code(alpha, u0)
    real(4), intent (in) :: alpha
    real(4), intent (in) :: u0
    code = u0 * ((alpha * alpha) * (1.0e0 + (u0 * 0.5e0)))
end function

Julia

function code(alpha, u0)
	return Float32(u0 * Float32(Float32(alpha * alpha) * Float32(Float32(1.0) + Float32(u0 * Float32(0.5)))))
end

MATLAB

function tmp = code(alpha, u0)
	tmp = u0 * ((alpha * alpha) * (single(1.0) + (u0 * single(0.5))));
end

Derivation

1. Initial program 54.3%

   \[\left(\left(-\alpha\right) \cdot \alpha\right) \cdot \log \left(1 - u0\right) \]
2. Step-by-step derivation

   1. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\left(\left(\mathsf{neg}\left(\alpha\right)\right) \cdot \alpha\right), \color{blue}{\log \left(1 - u0\right)}\right) \]

   2. *-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(\left(\alpha \cdot \left(\mathsf{neg}\left(\alpha\right)\right)\right), \log \color{blue}{\left(1 - u0\right)}\right) \]

   3. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \left(\mathsf{neg}\left(\alpha\right)\right)\right), \log \color{blue}{\left(1 - u0\right)}\right) \]

   4. neg-lowering-neg.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \log \left(1 - \color{blue}{u0}\right)\right) \]

   5. sub-neg N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \log \left(1 + \left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   6. log1p-define N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \left(\mathsf{log1p}\left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   7. log1p-lowering-log1p.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{log1p.f32}\left(\left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   8. neg-lowering-neg.f32 99.2%

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

3. Simplified 99.2%

   \[\leadsto \color{blue}{\left(\alpha \cdot \left(-\alpha\right)\right) \cdot \mathsf{log1p}\left(-u0\right)} \]
4. Add Preprocessing
5. Step-by-step derivation

   1. neg-sub0 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \left(0 - \alpha\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

   2. flip3-- N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \left(\frac{{0}^{3} - {\alpha}^{3}}{0 \cdot 0 + \left(\alpha \cdot \alpha + 0 \cdot \alpha\right)}\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

   3. metadata-eval N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \left(\frac{{0}^{3} - {\alpha}^{3}}{0 + \left(\alpha \cdot \alpha + 0 \cdot \alpha\right)}\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

   4. +-lft-identity N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \left(\frac{{0}^{3} - {\alpha}^{3}}{\alpha \cdot \alpha + 0 \cdot \alpha}\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

   5. distribute-rgt-out N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \left(\frac{{0}^{3} - {\alpha}^{3}}{\alpha \cdot \left(\alpha + 0\right)}\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

   6. +-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \left(\frac{{0}^{3} - {\alpha}^{3}}{\alpha \cdot \left(0 + \alpha\right)}\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

   7. +-lft-identity N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \left(\frac{{0}^{3} - {\alpha}^{3}}{\alpha \cdot \alpha}\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

   8. /-lowering-/.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{/.f32}\left(\left({0}^{3} - {\alpha}^{3}\right), \left(\alpha \cdot \alpha\right)\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

   9. metadata-eval N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{/.f32}\left(\left(0 - {\alpha}^{3}\right), \left(\alpha \cdot \alpha\right)\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

   10. sub0-neg N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{/.f32}\left(\left(\mathsf{neg}\left({\alpha}^{3}\right)\right), \left(\alpha \cdot \alpha\right)\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

   11. neg-lowering-neg.f32 N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{/.f32}\left(\mathsf{neg.f32}\left(\left({\alpha}^{3}\right)\right), \left(\alpha \cdot \alpha\right)\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

   12. cube-mult N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{/.f32}\left(\mathsf{neg.f32}\left(\left(\alpha \cdot \left(\alpha \cdot \alpha\right)\right)\right), \left(\alpha \cdot \alpha\right)\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

   13. *-lowering-*.f32 N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{/.f32}\left(\mathsf{neg.f32}\left(\mathsf{*.f32}\left(\alpha, \left(\alpha \cdot \alpha\right)\right)\right), \left(\alpha \cdot \alpha\right)\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

   14. *-lowering-*.f32 N/A

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{/.f32}\left(\mathsf{neg.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{*.f32}\left(\alpha, \alpha\right)\right)\right), \left(\alpha \cdot \alpha\right)\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

   15. *-lowering-*.f32 98.9%

       \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{/.f32}\left(\mathsf{neg.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{*.f32}\left(\alpha, \alpha\right)\right)\right), \mathsf{*.f32}\left(\alpha, \alpha\right)\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

6. Applied egg-rr 98.9%

   \[\leadsto \left(\alpha \cdot \color{blue}{\frac{-\alpha \cdot \left(\alpha \cdot \alpha\right)}{\alpha \cdot \alpha}}\right) \cdot \mathsf{log1p}\left(-u0\right) \]

7. Taylor expanded in u0 around 0

   \[\leadsto \color{blue}{u0 \cdot \left(\frac{1}{2} \cdot \left({\alpha}^{2} \cdot u0\right) + {\alpha}^{2}\right)} \]
8. Step-by-step derivation

   1. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \color{blue}{\left(\frac{1}{2} \cdot \left({\alpha}^{2} \cdot u0\right) + {\alpha}^{2}\right)}\right) \]

   2. +-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \left({\alpha}^{2} + \color{blue}{\frac{1}{2} \cdot \left({\alpha}^{2} \cdot u0\right)}\right)\right) \]

   3. *-lft-identity N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \left(1 \cdot {\alpha}^{2} + \color{blue}{\frac{1}{2}} \cdot \left({\alpha}^{2} \cdot u0\right)\right)\right) \]

   4. *-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \left(1 \cdot {\alpha}^{2} + \frac{1}{2} \cdot \left(u0 \cdot \color{blue}{{\alpha}^{2}}\right)\right)\right) \]

   5. associate-*r* N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \left(1 \cdot {\alpha}^{2} + \left(\frac{1}{2} \cdot u0\right) \cdot \color{blue}{{\alpha}^{2}}\right)\right) \]

   6. distribute-rgt-out N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \left({\alpha}^{2} \cdot \color{blue}{\left(1 + \frac{1}{2} \cdot u0\right)}\right)\right) \]

   7. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\left({\alpha}^{2}\right), \color{blue}{\left(1 + \frac{1}{2} \cdot u0\right)}\right)\right) \]

   8. unpow2 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\left(\alpha \cdot \alpha\right), \left(\color{blue}{1} + \frac{1}{2} \cdot u0\right)\right)\right) \]

   9. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \left(\color{blue}{1} + \frac{1}{2} \cdot u0\right)\right)\right) \]

   10. +-lowering-+.f32 N/A

       \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \mathsf{+.f32}\left(1, \color{blue}{\left(\frac{1}{2} \cdot u0\right)}\right)\right)\right) \]

   11. *-commutative N/A

       \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \mathsf{+.f32}\left(1, \left(u0 \cdot \color{blue}{\frac{1}{2}}\right)\right)\right)\right) \]

   12. *-lowering-*.f32 88.6%

       \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \alpha\right), \mathsf{+.f32}\left(1, \mathsf{*.f32}\left(u0, \color{blue}{\frac{1}{2}}\right)\right)\right)\right) \]

9. Simplified 88.6%

   \[\leadsto \color{blue}{u0 \cdot \left(\left(\alpha \cdot \alpha\right) \cdot \left(1 + u0 \cdot 0.5\right)\right)} \]
10. Add Preprocessing

Alternative 13: 74.7% accurate, 21.6× speedup

Math

\[\begin{array}{l} \\ \alpha \cdot \left(\alpha \cdot u0\right) \end{array} \]

FPCore

(FPCore (alpha u0) :precision binary32 (* alpha (* alpha u0)))

C

float code(float alpha, float u0) {
	return alpha * (alpha * u0);
}

Fortran

real(4) function code(alpha, u0)
    real(4), intent (in) :: alpha
    real(4), intent (in) :: u0
    code = alpha * (alpha * u0)
end function

Julia

function code(alpha, u0)
	return Float32(alpha * Float32(alpha * u0))
end

MATLAB

function tmp = code(alpha, u0)
	tmp = alpha * (alpha * u0);
end

Derivation

1. Initial program 54.3%

   \[\left(\left(-\alpha\right) \cdot \alpha\right) \cdot \log \left(1 - u0\right) \]
2. Step-by-step derivation

   1. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\left(\left(\mathsf{neg}\left(\alpha\right)\right) \cdot \alpha\right), \color{blue}{\log \left(1 - u0\right)}\right) \]

   2. *-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(\left(\alpha \cdot \left(\mathsf{neg}\left(\alpha\right)\right)\right), \log \color{blue}{\left(1 - u0\right)}\right) \]

   3. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \left(\mathsf{neg}\left(\alpha\right)\right)\right), \log \color{blue}{\left(1 - u0\right)}\right) \]

   4. neg-lowering-neg.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \log \left(1 - \color{blue}{u0}\right)\right) \]

   5. sub-neg N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \log \left(1 + \left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   6. log1p-define N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \left(\mathsf{log1p}\left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   7. log1p-lowering-log1p.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{log1p.f32}\left(\left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   8. neg-lowering-neg.f32 99.2%

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

3. Simplified 99.2%

   \[\leadsto \color{blue}{\left(\alpha \cdot \left(-\alpha\right)\right) \cdot \mathsf{log1p}\left(-u0\right)} \]
4. Add Preprocessing

5. Taylor expanded in u0 around 0

   \[\leadsto \color{blue}{{\alpha}^{2} \cdot u0} \]
6. Step-by-step derivation

   1. *-commutative N/A

      \[\leadsto u0 \cdot \color{blue}{{\alpha}^{2}} \]

   2. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \color{blue}{\left({\alpha}^{2}\right)}\right) \]

   3. unpow2 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \left(\alpha \cdot \color{blue}{\alpha}\right)\right) \]

   4. *-lowering-*.f32 76.4%

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\alpha, \color{blue}{\alpha}\right)\right) \]

7. Simplified 76.4%

   \[\leadsto \color{blue}{u0 \cdot \left(\alpha \cdot \alpha\right)} \]
8. Step-by-step derivation

   1. associate-*r* N/A

      \[\leadsto \left(u0 \cdot \alpha\right) \cdot \color{blue}{\alpha} \]

   2. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\left(u0 \cdot \alpha\right), \color{blue}{\alpha}\right) \]

   3. *-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(\left(\alpha \cdot u0\right), \alpha\right) \]

   4. *-lowering-*.f32 76.4%

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, u0\right), \alpha\right) \]

9. Applied egg-rr 76.4%

   \[\leadsto \color{blue}{\left(\alpha \cdot u0\right) \cdot \alpha} \]

10. Final simplification 76.4%

    \[\leadsto \alpha \cdot \left(\alpha \cdot u0\right) \]
11. Add Preprocessing

Alternative 14: 74.7% accurate, 21.6× speedup

Math

\[\begin{array}{l} \\ u0 \cdot \left(\alpha \cdot \alpha\right) \end{array} \]

FPCore

(FPCore (alpha u0) :precision binary32 (* u0 (* alpha alpha)))

C

float code(float alpha, float u0) {
	return u0 * (alpha * alpha);
}

Fortran

real(4) function code(alpha, u0)
    real(4), intent (in) :: alpha
    real(4), intent (in) :: u0
    code = u0 * (alpha * alpha)
end function

Julia

function code(alpha, u0)
	return Float32(u0 * Float32(alpha * alpha))
end

MATLAB

function tmp = code(alpha, u0)
	tmp = u0 * (alpha * alpha);
end

Derivation

1. Initial program 54.3%

   \[\left(\left(-\alpha\right) \cdot \alpha\right) \cdot \log \left(1 - u0\right) \]
2. Step-by-step derivation

   1. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\left(\left(\mathsf{neg}\left(\alpha\right)\right) \cdot \alpha\right), \color{blue}{\log \left(1 - u0\right)}\right) \]

   2. *-commutative N/A

      \[\leadsto \mathsf{*.f32}\left(\left(\alpha \cdot \left(\mathsf{neg}\left(\alpha\right)\right)\right), \log \color{blue}{\left(1 - u0\right)}\right) \]

   3. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \left(\mathsf{neg}\left(\alpha\right)\right)\right), \log \color{blue}{\left(1 - u0\right)}\right) \]

   4. neg-lowering-neg.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \log \left(1 - \color{blue}{u0}\right)\right) \]

   5. sub-neg N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \log \left(1 + \left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   6. log1p-define N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \left(\mathsf{log1p}\left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   7. log1p-lowering-log1p.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{log1p.f32}\left(\left(\mathsf{neg}\left(u0\right)\right)\right)\right) \]

   8. neg-lowering-neg.f32 99.2%

      \[\leadsto \mathsf{*.f32}\left(\mathsf{*.f32}\left(\alpha, \mathsf{neg.f32}\left(\alpha\right)\right), \mathsf{log1p.f32}\left(\mathsf{neg.f32}\left(u0\right)\right)\right) \]

3. Simplified 99.2%

   \[\leadsto \color{blue}{\left(\alpha \cdot \left(-\alpha\right)\right) \cdot \mathsf{log1p}\left(-u0\right)} \]
4. Add Preprocessing

5. Taylor expanded in u0 around 0

   \[\leadsto \color{blue}{{\alpha}^{2} \cdot u0} \]
6. Step-by-step derivation

   1. *-commutative N/A

      \[\leadsto u0 \cdot \color{blue}{{\alpha}^{2}} \]

   2. *-lowering-*.f32 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \color{blue}{\left({\alpha}^{2}\right)}\right) \]

   3. unpow2 N/A

      \[\leadsto \mathsf{*.f32}\left(u0, \left(\alpha \cdot \color{blue}{\alpha}\right)\right) \]

   4. *-lowering-*.f32 76.4%

      \[\leadsto \mathsf{*.f32}\left(u0, \mathsf{*.f32}\left(\alpha, \color{blue}{\alpha}\right)\right) \]

7. Simplified 76.4%

   \[\leadsto \color{blue}{u0 \cdot \left(\alpha \cdot \alpha\right)} \]
8. Add Preprocessing

Reproduce

herbie shell --seed 2024160 
(FPCore (alpha u0)
  :name "Beckmann Distribution sample, tan2theta, alphax == alphay"
  :precision binary32
  :pre (and (and (<= 0.0001 alpha) (<= alpha 1.0)) (and (<= 2.328306437e-10 u0) (<= u0 1.0)))
  (* (* (- alpha) alpha) (log (- 1.0 u0))))