
(FPCore (x eps) :precision binary64 (- (cos (+ x eps)) (cos x)))
double code(double x, double eps) {
return cos((x + eps)) - cos(x);
}
real(8) function code(x, eps)
real(8), intent (in) :: x
real(8), intent (in) :: eps
code = cos((x + eps)) - cos(x)
end function
public static double code(double x, double eps) {
return Math.cos((x + eps)) - Math.cos(x);
}
def code(x, eps): return math.cos((x + eps)) - math.cos(x)
function code(x, eps) return Float64(cos(Float64(x + eps)) - cos(x)) end
function tmp = code(x, eps) tmp = cos((x + eps)) - cos(x); end
code[x_, eps_] := N[(N[Cos[N[(x + eps), $MachinePrecision]], $MachinePrecision] - N[Cos[x], $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\cos \left(x + \varepsilon\right) - \cos x
\end{array}
Sampling outcomes in binary64 precision:
Herbie found 11 alternatives:
| Alternative | Accuracy | Speedup |
|---|
(FPCore (x eps) :precision binary64 (- (cos (+ x eps)) (cos x)))
double code(double x, double eps) {
return cos((x + eps)) - cos(x);
}
real(8) function code(x, eps)
real(8), intent (in) :: x
real(8), intent (in) :: eps
code = cos((x + eps)) - cos(x)
end function
public static double code(double x, double eps) {
return Math.cos((x + eps)) - Math.cos(x);
}
def code(x, eps): return math.cos((x + eps)) - math.cos(x)
function code(x, eps) return Float64(cos(Float64(x + eps)) - cos(x)) end
function tmp = code(x, eps) tmp = cos((x + eps)) - cos(x); end
code[x_, eps_] := N[(N[Cos[N[(x + eps), $MachinePrecision]], $MachinePrecision] - N[Cos[x], $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\cos \left(x + \varepsilon\right) - \cos x
\end{array}
(FPCore (x eps) :precision binary64 (* (* (sin (/ eps 2.0)) (sin (/ (+ eps (* 2.0 x)) 2.0))) -2.0))
double code(double x, double eps) {
return (sin((eps / 2.0)) * sin(((eps + (2.0 * x)) / 2.0))) * -2.0;
}
real(8) function code(x, eps)
real(8), intent (in) :: x
real(8), intent (in) :: eps
code = (sin((eps / 2.0d0)) * sin(((eps + (2.0d0 * x)) / 2.0d0))) * (-2.0d0)
end function
public static double code(double x, double eps) {
return (Math.sin((eps / 2.0)) * Math.sin(((eps + (2.0 * x)) / 2.0))) * -2.0;
}
def code(x, eps): return (math.sin((eps / 2.0)) * math.sin(((eps + (2.0 * x)) / 2.0))) * -2.0
function code(x, eps) return Float64(Float64(sin(Float64(eps / 2.0)) * sin(Float64(Float64(eps + Float64(2.0 * x)) / 2.0))) * -2.0) end
function tmp = code(x, eps) tmp = (sin((eps / 2.0)) * sin(((eps + (2.0 * x)) / 2.0))) * -2.0; end
code[x_, eps_] := N[(N[(N[Sin[N[(eps / 2.0), $MachinePrecision]], $MachinePrecision] * N[Sin[N[(N[(eps + N[(2.0 * x), $MachinePrecision]), $MachinePrecision] / 2.0), $MachinePrecision]], $MachinePrecision]), $MachinePrecision] * -2.0), $MachinePrecision]
\begin{array}{l}
\\
\left(\sin \left(\frac{\varepsilon}{2}\right) \cdot \sin \left(\frac{\varepsilon + 2 \cdot x}{2}\right)\right) \cdot -2
\end{array}
Initial program 54.4%
diff-cosN/A
*-commutativeN/A
*-lowering-*.f64N/A
Applied egg-rr99.7%
Final simplification99.7%
(FPCore (x eps)
:precision binary64
(*
-2.0
(*
(sin (/ (+ eps (* 2.0 x)) 2.0))
(*
eps
(+
0.5
(*
(* eps eps)
(+
-0.020833333333333332
(*
eps
(*
eps
(+
0.00026041666666666666
(* (* eps eps) -1.5500992063492063e-6)))))))))))
double code(double x, double eps) {
return -2.0 * (sin(((eps + (2.0 * x)) / 2.0)) * (eps * (0.5 + ((eps * eps) * (-0.020833333333333332 + (eps * (eps * (0.00026041666666666666 + ((eps * eps) * -1.5500992063492063e-6)))))))));
}
real(8) function code(x, eps)
real(8), intent (in) :: x
real(8), intent (in) :: eps
code = (-2.0d0) * (sin(((eps + (2.0d0 * x)) / 2.0d0)) * (eps * (0.5d0 + ((eps * eps) * ((-0.020833333333333332d0) + (eps * (eps * (0.00026041666666666666d0 + ((eps * eps) * (-1.5500992063492063d-6))))))))))
end function
public static double code(double x, double eps) {
return -2.0 * (Math.sin(((eps + (2.0 * x)) / 2.0)) * (eps * (0.5 + ((eps * eps) * (-0.020833333333333332 + (eps * (eps * (0.00026041666666666666 + ((eps * eps) * -1.5500992063492063e-6)))))))));
}
def code(x, eps): return -2.0 * (math.sin(((eps + (2.0 * x)) / 2.0)) * (eps * (0.5 + ((eps * eps) * (-0.020833333333333332 + (eps * (eps * (0.00026041666666666666 + ((eps * eps) * -1.5500992063492063e-6)))))))))
function code(x, eps) return Float64(-2.0 * Float64(sin(Float64(Float64(eps + Float64(2.0 * x)) / 2.0)) * Float64(eps * Float64(0.5 + Float64(Float64(eps * eps) * Float64(-0.020833333333333332 + Float64(eps * Float64(eps * Float64(0.00026041666666666666 + Float64(Float64(eps * eps) * -1.5500992063492063e-6)))))))))) end
function tmp = code(x, eps) tmp = -2.0 * (sin(((eps + (2.0 * x)) / 2.0)) * (eps * (0.5 + ((eps * eps) * (-0.020833333333333332 + (eps * (eps * (0.00026041666666666666 + ((eps * eps) * -1.5500992063492063e-6))))))))); end
code[x_, eps_] := N[(-2.0 * N[(N[Sin[N[(N[(eps + N[(2.0 * x), $MachinePrecision]), $MachinePrecision] / 2.0), $MachinePrecision]], $MachinePrecision] * N[(eps * N[(0.5 + N[(N[(eps * eps), $MachinePrecision] * N[(-0.020833333333333332 + N[(eps * N[(eps * N[(0.00026041666666666666 + N[(N[(eps * eps), $MachinePrecision] * -1.5500992063492063e-6), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
-2 \cdot \left(\sin \left(\frac{\varepsilon + 2 \cdot x}{2}\right) \cdot \left(\varepsilon \cdot \left(0.5 + \left(\varepsilon \cdot \varepsilon\right) \cdot \left(-0.020833333333333332 + \varepsilon \cdot \left(\varepsilon \cdot \left(0.00026041666666666666 + \left(\varepsilon \cdot \varepsilon\right) \cdot -1.5500992063492063 \cdot 10^{-6}\right)\right)\right)\right)\right)\right)
\end{array}
Initial program 54.4%
diff-cosN/A
*-commutativeN/A
*-lowering-*.f64N/A
Applied egg-rr99.7%
Taylor expanded in eps around 0
*-lowering-*.f64N/A
+-lowering-+.f64N/A
*-lowering-*.f64N/A
unpow2N/A
*-lowering-*.f64N/A
sub-negN/A
metadata-evalN/A
+-commutativeN/A
+-lowering-+.f64N/A
unpow2N/A
associate-*l*N/A
*-lowering-*.f64N/A
*-lowering-*.f64N/A
+-lowering-+.f64N/A
*-commutativeN/A
*-lowering-*.f64N/A
unpow2N/A
*-lowering-*.f6499.3%
Simplified99.3%
Final simplification99.3%
(FPCore (x eps)
:precision binary64
(*
-2.0
(*
eps
(*
(sin (+ x (* eps 0.5)))
(+
0.5
(*
(* eps eps)
(+
-0.020833333333333332
(*
eps
(*
eps
(+
0.00026041666666666666
(* (* eps eps) -1.5500992063492063e-6)))))))))))
double code(double x, double eps) {
return -2.0 * (eps * (sin((x + (eps * 0.5))) * (0.5 + ((eps * eps) * (-0.020833333333333332 + (eps * (eps * (0.00026041666666666666 + ((eps * eps) * -1.5500992063492063e-6)))))))));
}
real(8) function code(x, eps)
real(8), intent (in) :: x
real(8), intent (in) :: eps
code = (-2.0d0) * (eps * (sin((x + (eps * 0.5d0))) * (0.5d0 + ((eps * eps) * ((-0.020833333333333332d0) + (eps * (eps * (0.00026041666666666666d0 + ((eps * eps) * (-1.5500992063492063d-6))))))))))
end function
public static double code(double x, double eps) {
return -2.0 * (eps * (Math.sin((x + (eps * 0.5))) * (0.5 + ((eps * eps) * (-0.020833333333333332 + (eps * (eps * (0.00026041666666666666 + ((eps * eps) * -1.5500992063492063e-6)))))))));
}
def code(x, eps): return -2.0 * (eps * (math.sin((x + (eps * 0.5))) * (0.5 + ((eps * eps) * (-0.020833333333333332 + (eps * (eps * (0.00026041666666666666 + ((eps * eps) * -1.5500992063492063e-6)))))))))
function code(x, eps) return Float64(-2.0 * Float64(eps * Float64(sin(Float64(x + Float64(eps * 0.5))) * Float64(0.5 + Float64(Float64(eps * eps) * Float64(-0.020833333333333332 + Float64(eps * Float64(eps * Float64(0.00026041666666666666 + Float64(Float64(eps * eps) * -1.5500992063492063e-6)))))))))) end
function tmp = code(x, eps) tmp = -2.0 * (eps * (sin((x + (eps * 0.5))) * (0.5 + ((eps * eps) * (-0.020833333333333332 + (eps * (eps * (0.00026041666666666666 + ((eps * eps) * -1.5500992063492063e-6))))))))); end
code[x_, eps_] := N[(-2.0 * N[(eps * N[(N[Sin[N[(x + N[(eps * 0.5), $MachinePrecision]), $MachinePrecision]], $MachinePrecision] * N[(0.5 + N[(N[(eps * eps), $MachinePrecision] * N[(-0.020833333333333332 + N[(eps * N[(eps * N[(0.00026041666666666666 + N[(N[(eps * eps), $MachinePrecision] * -1.5500992063492063e-6), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
-2 \cdot \left(\varepsilon \cdot \left(\sin \left(x + \varepsilon \cdot 0.5\right) \cdot \left(0.5 + \left(\varepsilon \cdot \varepsilon\right) \cdot \left(-0.020833333333333332 + \varepsilon \cdot \left(\varepsilon \cdot \left(0.00026041666666666666 + \left(\varepsilon \cdot \varepsilon\right) \cdot -1.5500992063492063 \cdot 10^{-6}\right)\right)\right)\right)\right)\right)
\end{array}
Initial program 54.4%
diff-cosN/A
*-commutativeN/A
*-lowering-*.f64N/A
Applied egg-rr99.7%
Taylor expanded in eps around 0
*-lowering-*.f64N/A
+-lowering-+.f64N/A
*-lowering-*.f64N/A
unpow2N/A
*-lowering-*.f64N/A
sub-negN/A
metadata-evalN/A
+-commutativeN/A
+-lowering-+.f64N/A
unpow2N/A
associate-*l*N/A
*-lowering-*.f64N/A
*-lowering-*.f64N/A
+-lowering-+.f64N/A
*-commutativeN/A
*-lowering-*.f64N/A
unpow2N/A
*-lowering-*.f6499.3%
Simplified99.3%
Taylor expanded in x around inf
*-lowering-*.f64N/A
*-lowering-*.f64N/A
Simplified99.3%
Final simplification99.3%
(FPCore (x eps)
:precision binary64
(*
-2.0
(*
(sin (/ (+ eps (* 2.0 x)) 2.0))
(*
eps
(+
0.5
(/
(* eps (+ -0.020833333333333332 (* (* eps eps) 0.00026041666666666666)))
(/ 1.0 eps)))))))
double code(double x, double eps) {
return -2.0 * (sin(((eps + (2.0 * x)) / 2.0)) * (eps * (0.5 + ((eps * (-0.020833333333333332 + ((eps * eps) * 0.00026041666666666666))) / (1.0 / eps)))));
}
real(8) function code(x, eps)
real(8), intent (in) :: x
real(8), intent (in) :: eps
code = (-2.0d0) * (sin(((eps + (2.0d0 * x)) / 2.0d0)) * (eps * (0.5d0 + ((eps * ((-0.020833333333333332d0) + ((eps * eps) * 0.00026041666666666666d0))) / (1.0d0 / eps)))))
end function
public static double code(double x, double eps) {
return -2.0 * (Math.sin(((eps + (2.0 * x)) / 2.0)) * (eps * (0.5 + ((eps * (-0.020833333333333332 + ((eps * eps) * 0.00026041666666666666))) / (1.0 / eps)))));
}
def code(x, eps): return -2.0 * (math.sin(((eps + (2.0 * x)) / 2.0)) * (eps * (0.5 + ((eps * (-0.020833333333333332 + ((eps * eps) * 0.00026041666666666666))) / (1.0 / eps)))))
function code(x, eps) return Float64(-2.0 * Float64(sin(Float64(Float64(eps + Float64(2.0 * x)) / 2.0)) * Float64(eps * Float64(0.5 + Float64(Float64(eps * Float64(-0.020833333333333332 + Float64(Float64(eps * eps) * 0.00026041666666666666))) / Float64(1.0 / eps)))))) end
function tmp = code(x, eps) tmp = -2.0 * (sin(((eps + (2.0 * x)) / 2.0)) * (eps * (0.5 + ((eps * (-0.020833333333333332 + ((eps * eps) * 0.00026041666666666666))) / (1.0 / eps))))); end
code[x_, eps_] := N[(-2.0 * N[(N[Sin[N[(N[(eps + N[(2.0 * x), $MachinePrecision]), $MachinePrecision] / 2.0), $MachinePrecision]], $MachinePrecision] * N[(eps * N[(0.5 + N[(N[(eps * N[(-0.020833333333333332 + N[(N[(eps * eps), $MachinePrecision] * 0.00026041666666666666), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] / N[(1.0 / eps), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
-2 \cdot \left(\sin \left(\frac{\varepsilon + 2 \cdot x}{2}\right) \cdot \left(\varepsilon \cdot \left(0.5 + \frac{\varepsilon \cdot \left(-0.020833333333333332 + \left(\varepsilon \cdot \varepsilon\right) \cdot 0.00026041666666666666\right)}{\frac{1}{\varepsilon}}\right)\right)\right)
\end{array}
Initial program 54.4%
diff-cosN/A
*-commutativeN/A
*-lowering-*.f64N/A
Applied egg-rr99.7%
Taylor expanded in eps around 0
*-lowering-*.f64N/A
+-lowering-+.f64N/A
*-lowering-*.f64N/A
unpow2N/A
*-lowering-*.f64N/A
sub-negN/A
metadata-evalN/A
+-commutativeN/A
+-lowering-+.f64N/A
*-commutativeN/A
unpow2N/A
associate-*l*N/A
*-lowering-*.f64N/A
*-lowering-*.f6499.2%
Simplified99.2%
associate-*l*N/A
remove-double-divN/A
associate-*l/N/A
associate-*l*N/A
*-lft-identityN/A
/-lowering-/.f64N/A
*-lowering-*.f64N/A
+-lowering-+.f64N/A
associate-*r*N/A
*-lowering-*.f64N/A
*-lowering-*.f64N/A
/-lowering-/.f6499.2%
Applied egg-rr99.2%
Final simplification99.2%
(FPCore (x eps)
:precision binary64
(*
-2.0
(*
(sin (+ x (* eps 0.5)))
(*
eps
(+
0.5
(*
(* eps eps)
(+ -0.020833333333333332 (* eps (* eps 0.00026041666666666666)))))))))
double code(double x, double eps) {
return -2.0 * (sin((x + (eps * 0.5))) * (eps * (0.5 + ((eps * eps) * (-0.020833333333333332 + (eps * (eps * 0.00026041666666666666)))))));
}
real(8) function code(x, eps)
real(8), intent (in) :: x
real(8), intent (in) :: eps
code = (-2.0d0) * (sin((x + (eps * 0.5d0))) * (eps * (0.5d0 + ((eps * eps) * ((-0.020833333333333332d0) + (eps * (eps * 0.00026041666666666666d0)))))))
end function
public static double code(double x, double eps) {
return -2.0 * (Math.sin((x + (eps * 0.5))) * (eps * (0.5 + ((eps * eps) * (-0.020833333333333332 + (eps * (eps * 0.00026041666666666666)))))));
}
def code(x, eps): return -2.0 * (math.sin((x + (eps * 0.5))) * (eps * (0.5 + ((eps * eps) * (-0.020833333333333332 + (eps * (eps * 0.00026041666666666666)))))))
function code(x, eps) return Float64(-2.0 * Float64(sin(Float64(x + Float64(eps * 0.5))) * Float64(eps * Float64(0.5 + Float64(Float64(eps * eps) * Float64(-0.020833333333333332 + Float64(eps * Float64(eps * 0.00026041666666666666)))))))) end
function tmp = code(x, eps) tmp = -2.0 * (sin((x + (eps * 0.5))) * (eps * (0.5 + ((eps * eps) * (-0.020833333333333332 + (eps * (eps * 0.00026041666666666666))))))); end
code[x_, eps_] := N[(-2.0 * N[(N[Sin[N[(x + N[(eps * 0.5), $MachinePrecision]), $MachinePrecision]], $MachinePrecision] * N[(eps * N[(0.5 + N[(N[(eps * eps), $MachinePrecision] * N[(-0.020833333333333332 + N[(eps * N[(eps * 0.00026041666666666666), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
-2 \cdot \left(\sin \left(x + \varepsilon \cdot 0.5\right) \cdot \left(\varepsilon \cdot \left(0.5 + \left(\varepsilon \cdot \varepsilon\right) \cdot \left(-0.020833333333333332 + \varepsilon \cdot \left(\varepsilon \cdot 0.00026041666666666666\right)\right)\right)\right)\right)
\end{array}
Initial program 54.4%
diff-cosN/A
*-commutativeN/A
*-lowering-*.f64N/A
Applied egg-rr99.7%
Taylor expanded in eps around 0
*-lowering-*.f64N/A
+-lowering-+.f64N/A
*-lowering-*.f64N/A
unpow2N/A
*-lowering-*.f64N/A
sub-negN/A
metadata-evalN/A
+-commutativeN/A
+-lowering-+.f64N/A
*-commutativeN/A
unpow2N/A
associate-*l*N/A
*-lowering-*.f64N/A
*-lowering-*.f6499.2%
Simplified99.2%
Taylor expanded in eps around inf
metadata-evalN/A
cancel-sign-sub-invN/A
sin-lowering-sin.f64N/A
cancel-sign-sub-invN/A
metadata-evalN/A
distribute-lft-inN/A
associate-*r*N/A
metadata-evalN/A
*-lft-identityN/A
+-commutativeN/A
+-lowering-+.f64N/A
*-commutativeN/A
*-lowering-*.f6499.2%
Simplified99.2%
Final simplification99.2%
(FPCore (x eps) :precision binary64 (* -2.0 (* (sin (/ (+ eps (* 2.0 x)) 2.0)) (* eps (+ 0.5 (* eps (* eps -0.020833333333333332)))))))
double code(double x, double eps) {
return -2.0 * (sin(((eps + (2.0 * x)) / 2.0)) * (eps * (0.5 + (eps * (eps * -0.020833333333333332)))));
}
real(8) function code(x, eps)
real(8), intent (in) :: x
real(8), intent (in) :: eps
code = (-2.0d0) * (sin(((eps + (2.0d0 * x)) / 2.0d0)) * (eps * (0.5d0 + (eps * (eps * (-0.020833333333333332d0))))))
end function
public static double code(double x, double eps) {
return -2.0 * (Math.sin(((eps + (2.0 * x)) / 2.0)) * (eps * (0.5 + (eps * (eps * -0.020833333333333332)))));
}
def code(x, eps): return -2.0 * (math.sin(((eps + (2.0 * x)) / 2.0)) * (eps * (0.5 + (eps * (eps * -0.020833333333333332)))))
function code(x, eps) return Float64(-2.0 * Float64(sin(Float64(Float64(eps + Float64(2.0 * x)) / 2.0)) * Float64(eps * Float64(0.5 + Float64(eps * Float64(eps * -0.020833333333333332)))))) end
function tmp = code(x, eps) tmp = -2.0 * (sin(((eps + (2.0 * x)) / 2.0)) * (eps * (0.5 + (eps * (eps * -0.020833333333333332))))); end
code[x_, eps_] := N[(-2.0 * N[(N[Sin[N[(N[(eps + N[(2.0 * x), $MachinePrecision]), $MachinePrecision] / 2.0), $MachinePrecision]], $MachinePrecision] * N[(eps * N[(0.5 + N[(eps * N[(eps * -0.020833333333333332), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
-2 \cdot \left(\sin \left(\frac{\varepsilon + 2 \cdot x}{2}\right) \cdot \left(\varepsilon \cdot \left(0.5 + \varepsilon \cdot \left(\varepsilon \cdot -0.020833333333333332\right)\right)\right)\right)
\end{array}
Initial program 54.4%
diff-cosN/A
*-commutativeN/A
*-lowering-*.f64N/A
Applied egg-rr99.7%
Taylor expanded in eps around 0
*-lowering-*.f64N/A
+-lowering-+.f64N/A
*-commutativeN/A
unpow2N/A
associate-*l*N/A
*-commutativeN/A
*-lowering-*.f64N/A
*-commutativeN/A
*-lowering-*.f6499.1%
Simplified99.1%
Final simplification99.1%
(FPCore (x eps) :precision binary64 (* -2.0 (* (sin (/ (+ eps (* 2.0 x)) 2.0)) (* eps 0.5))))
double code(double x, double eps) {
return -2.0 * (sin(((eps + (2.0 * x)) / 2.0)) * (eps * 0.5));
}
real(8) function code(x, eps)
real(8), intent (in) :: x
real(8), intent (in) :: eps
code = (-2.0d0) * (sin(((eps + (2.0d0 * x)) / 2.0d0)) * (eps * 0.5d0))
end function
public static double code(double x, double eps) {
return -2.0 * (Math.sin(((eps + (2.0 * x)) / 2.0)) * (eps * 0.5));
}
def code(x, eps): return -2.0 * (math.sin(((eps + (2.0 * x)) / 2.0)) * (eps * 0.5))
function code(x, eps) return Float64(-2.0 * Float64(sin(Float64(Float64(eps + Float64(2.0 * x)) / 2.0)) * Float64(eps * 0.5))) end
function tmp = code(x, eps) tmp = -2.0 * (sin(((eps + (2.0 * x)) / 2.0)) * (eps * 0.5)); end
code[x_, eps_] := N[(-2.0 * N[(N[Sin[N[(N[(eps + N[(2.0 * x), $MachinePrecision]), $MachinePrecision] / 2.0), $MachinePrecision]], $MachinePrecision] * N[(eps * 0.5), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
-2 \cdot \left(\sin \left(\frac{\varepsilon + 2 \cdot x}{2}\right) \cdot \left(\varepsilon \cdot 0.5\right)\right)
\end{array}
Initial program 54.4%
diff-cosN/A
*-commutativeN/A
*-lowering-*.f64N/A
Applied egg-rr99.7%
Taylor expanded in eps around 0
*-commutativeN/A
*-lowering-*.f6498.7%
Simplified98.7%
Final simplification98.7%
(FPCore (x eps) :precision binary64 (* eps (- (* eps -0.5) x)))
double code(double x, double eps) {
return eps * ((eps * -0.5) - x);
}
real(8) function code(x, eps)
real(8), intent (in) :: x
real(8), intent (in) :: eps
code = eps * ((eps * (-0.5d0)) - x)
end function
public static double code(double x, double eps) {
return eps * ((eps * -0.5) - x);
}
def code(x, eps): return eps * ((eps * -0.5) - x)
function code(x, eps) return Float64(eps * Float64(Float64(eps * -0.5) - x)) end
function tmp = code(x, eps) tmp = eps * ((eps * -0.5) - x); end
code[x_, eps_] := N[(eps * N[(N[(eps * -0.5), $MachinePrecision] - x), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\varepsilon \cdot \left(\varepsilon \cdot -0.5 - x\right)
\end{array}
Initial program 54.4%
Taylor expanded in x around 0
+-commutativeN/A
associate--l+N/A
+-commutativeN/A
mul-1-negN/A
sub-negN/A
--lowering--.f64N/A
sub-negN/A
metadata-evalN/A
+-lowering-+.f64N/A
cos-lowering-cos.f64N/A
*-lowering-*.f64N/A
sin-lowering-sin.f6479.0%
Simplified79.0%
Taylor expanded in eps around 0
*-lowering-*.f64N/A
--lowering--.f64N/A
*-commutativeN/A
*-lowering-*.f6497.6%
Simplified97.6%
(FPCore (x eps) :precision binary64 (- 0.0 (* eps x)))
double code(double x, double eps) {
return 0.0 - (eps * x);
}
real(8) function code(x, eps)
real(8), intent (in) :: x
real(8), intent (in) :: eps
code = 0.0d0 - (eps * x)
end function
public static double code(double x, double eps) {
return 0.0 - (eps * x);
}
def code(x, eps): return 0.0 - (eps * x)
function code(x, eps) return Float64(0.0 - Float64(eps * x)) end
function tmp = code(x, eps) tmp = 0.0 - (eps * x); end
code[x_, eps_] := N[(0.0 - N[(eps * x), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
0 - \varepsilon \cdot x
\end{array}
Initial program 54.4%
Taylor expanded in x around 0
+-commutativeN/A
associate--l+N/A
+-commutativeN/A
mul-1-negN/A
sub-negN/A
--lowering--.f64N/A
sub-negN/A
metadata-evalN/A
+-lowering-+.f64N/A
cos-lowering-cos.f64N/A
*-lowering-*.f64N/A
sin-lowering-sin.f6479.0%
Simplified79.0%
Taylor expanded in eps around 0
mul-1-negN/A
neg-sub0N/A
--lowering--.f64N/A
*-lowering-*.f6478.8%
Simplified78.8%
(FPCore (x eps) :precision binary64 (* eps (* eps -0.5)))
double code(double x, double eps) {
return eps * (eps * -0.5);
}
real(8) function code(x, eps)
real(8), intent (in) :: x
real(8), intent (in) :: eps
code = eps * (eps * (-0.5d0))
end function
public static double code(double x, double eps) {
return eps * (eps * -0.5);
}
def code(x, eps): return eps * (eps * -0.5)
function code(x, eps) return Float64(eps * Float64(eps * -0.5)) end
function tmp = code(x, eps) tmp = eps * (eps * -0.5); end
code[x_, eps_] := N[(eps * N[(eps * -0.5), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\varepsilon \cdot \left(\varepsilon \cdot -0.5\right)
\end{array}
Initial program 54.4%
Taylor expanded in x around 0
sub-negN/A
metadata-evalN/A
+-lowering-+.f64N/A
cos-lowering-cos.f6452.5%
Simplified52.5%
Taylor expanded in eps around 0
*-commutativeN/A
unpow2N/A
associate-*l*N/A
*-commutativeN/A
*-lowering-*.f64N/A
*-commutativeN/A
*-lowering-*.f6453.8%
Simplified53.8%
(FPCore (x eps) :precision binary64 0.0)
double code(double x, double eps) {
return 0.0;
}
real(8) function code(x, eps)
real(8), intent (in) :: x
real(8), intent (in) :: eps
code = 0.0d0
end function
public static double code(double x, double eps) {
return 0.0;
}
def code(x, eps): return 0.0
function code(x, eps) return 0.0 end
function tmp = code(x, eps) tmp = 0.0; end
code[x_, eps_] := 0.0
\begin{array}{l}
\\
0
\end{array}
Initial program 54.4%
Taylor expanded in x around 0
sub-negN/A
metadata-evalN/A
+-lowering-+.f64N/A
cos-lowering-cos.f6452.5%
Simplified52.5%
Taylor expanded in eps around 0
Simplified52.4%
metadata-eval52.4%
Applied egg-rr52.4%
(FPCore (x eps) :precision binary64 (* (* -2.0 (sin (+ x (/ eps 2.0)))) (sin (/ eps 2.0))))
double code(double x, double eps) {
return (-2.0 * sin((x + (eps / 2.0)))) * sin((eps / 2.0));
}
real(8) function code(x, eps)
real(8), intent (in) :: x
real(8), intent (in) :: eps
code = ((-2.0d0) * sin((x + (eps / 2.0d0)))) * sin((eps / 2.0d0))
end function
public static double code(double x, double eps) {
return (-2.0 * Math.sin((x + (eps / 2.0)))) * Math.sin((eps / 2.0));
}
def code(x, eps): return (-2.0 * math.sin((x + (eps / 2.0)))) * math.sin((eps / 2.0))
function code(x, eps) return Float64(Float64(-2.0 * sin(Float64(x + Float64(eps / 2.0)))) * sin(Float64(eps / 2.0))) end
function tmp = code(x, eps) tmp = (-2.0 * sin((x + (eps / 2.0)))) * sin((eps / 2.0)); end
code[x_, eps_] := N[(N[(-2.0 * N[Sin[N[(x + N[(eps / 2.0), $MachinePrecision]), $MachinePrecision]], $MachinePrecision]), $MachinePrecision] * N[Sin[N[(eps / 2.0), $MachinePrecision]], $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\left(-2 \cdot \sin \left(x + \frac{\varepsilon}{2}\right)\right) \cdot \sin \left(\frac{\varepsilon}{2}\right)
\end{array}
herbie shell --seed 2024288
(FPCore (x eps)
:name "2cos (problem 3.3.5)"
:precision binary64
:pre (and (and (and (<= -10000.0 x) (<= x 10000.0)) (< (* 1e-16 (fabs x)) eps)) (< eps (fabs x)))
:alt
(! :herbie-platform default (* -2 (sin (+ x (/ eps 2))) (sin (/ eps 2))))
(- (cos (+ x eps)) (cos x)))