
(FPCore (a b) :precision binary64 (- (+ (pow (+ (* a a) (* b b)) 2.0) (* 4.0 (+ (* (* a a) (- 1.0 a)) (* (* b b) (+ 3.0 a))))) 1.0))
double code(double a, double b) {
return (pow(((a * a) + (b * b)), 2.0) + (4.0 * (((a * a) * (1.0 - a)) + ((b * b) * (3.0 + a))))) - 1.0;
}
real(8) function code(a, b)
real(8), intent (in) :: a
real(8), intent (in) :: b
code = ((((a * a) + (b * b)) ** 2.0d0) + (4.0d0 * (((a * a) * (1.0d0 - a)) + ((b * b) * (3.0d0 + a))))) - 1.0d0
end function
public static double code(double a, double b) {
return (Math.pow(((a * a) + (b * b)), 2.0) + (4.0 * (((a * a) * (1.0 - a)) + ((b * b) * (3.0 + a))))) - 1.0;
}
def code(a, b): return (math.pow(((a * a) + (b * b)), 2.0) + (4.0 * (((a * a) * (1.0 - a)) + ((b * b) * (3.0 + a))))) - 1.0
function code(a, b) return Float64(Float64((Float64(Float64(a * a) + Float64(b * b)) ^ 2.0) + Float64(4.0 * Float64(Float64(Float64(a * a) * Float64(1.0 - a)) + Float64(Float64(b * b) * Float64(3.0 + a))))) - 1.0) end
function tmp = code(a, b) tmp = ((((a * a) + (b * b)) ^ 2.0) + (4.0 * (((a * a) * (1.0 - a)) + ((b * b) * (3.0 + a))))) - 1.0; end
code[a_, b_] := N[(N[(N[Power[N[(N[(a * a), $MachinePrecision] + N[(b * b), $MachinePrecision]), $MachinePrecision], 2.0], $MachinePrecision] + N[(4.0 * N[(N[(N[(a * a), $MachinePrecision] * N[(1.0 - a), $MachinePrecision]), $MachinePrecision] + N[(N[(b * b), $MachinePrecision] * N[(3.0 + a), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] - 1.0), $MachinePrecision]
\begin{array}{l}
\\
\left({\left(a \cdot a + b \cdot b\right)}^{2} + 4 \cdot \left(\left(a \cdot a\right) \cdot \left(1 - a\right) + \left(b \cdot b\right) \cdot \left(3 + a\right)\right)\right) - 1
\end{array}
Sampling outcomes in binary64 precision:
Herbie found 5 alternatives:
| Alternative | Accuracy | Speedup |
|---|
(FPCore (a b) :precision binary64 (- (+ (pow (+ (* a a) (* b b)) 2.0) (* 4.0 (+ (* (* a a) (- 1.0 a)) (* (* b b) (+ 3.0 a))))) 1.0))
double code(double a, double b) {
return (pow(((a * a) + (b * b)), 2.0) + (4.0 * (((a * a) * (1.0 - a)) + ((b * b) * (3.0 + a))))) - 1.0;
}
real(8) function code(a, b)
real(8), intent (in) :: a
real(8), intent (in) :: b
code = ((((a * a) + (b * b)) ** 2.0d0) + (4.0d0 * (((a * a) * (1.0d0 - a)) + ((b * b) * (3.0d0 + a))))) - 1.0d0
end function
public static double code(double a, double b) {
return (Math.pow(((a * a) + (b * b)), 2.0) + (4.0 * (((a * a) * (1.0 - a)) + ((b * b) * (3.0 + a))))) - 1.0;
}
def code(a, b): return (math.pow(((a * a) + (b * b)), 2.0) + (4.0 * (((a * a) * (1.0 - a)) + ((b * b) * (3.0 + a))))) - 1.0
function code(a, b) return Float64(Float64((Float64(Float64(a * a) + Float64(b * b)) ^ 2.0) + Float64(4.0 * Float64(Float64(Float64(a * a) * Float64(1.0 - a)) + Float64(Float64(b * b) * Float64(3.0 + a))))) - 1.0) end
function tmp = code(a, b) tmp = ((((a * a) + (b * b)) ^ 2.0) + (4.0 * (((a * a) * (1.0 - a)) + ((b * b) * (3.0 + a))))) - 1.0; end
code[a_, b_] := N[(N[(N[Power[N[(N[(a * a), $MachinePrecision] + N[(b * b), $MachinePrecision]), $MachinePrecision], 2.0], $MachinePrecision] + N[(4.0 * N[(N[(N[(a * a), $MachinePrecision] * N[(1.0 - a), $MachinePrecision]), $MachinePrecision] + N[(N[(b * b), $MachinePrecision] * N[(3.0 + a), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] - 1.0), $MachinePrecision]
\begin{array}{l}
\\
\left({\left(a \cdot a + b \cdot b\right)}^{2} + 4 \cdot \left(\left(a \cdot a\right) \cdot \left(1 - a\right) + \left(b \cdot b\right) \cdot \left(3 + a\right)\right)\right) - 1
\end{array}
(FPCore (a b)
:precision binary64
(let* ((t_0
(+
(pow (+ (* a a) (* b b)) 2.0)
(* 4.0 (+ (* (* a a) (- 1.0 a)) (* (* b b) (+ a 3.0)))))))
(if (<= t_0 INFINITY) (+ t_0 -1.0) (* (pow a 3.0) (- a 4.0)))))
double code(double a, double b) {
double t_0 = pow(((a * a) + (b * b)), 2.0) + (4.0 * (((a * a) * (1.0 - a)) + ((b * b) * (a + 3.0))));
double tmp;
if (t_0 <= ((double) INFINITY)) {
tmp = t_0 + -1.0;
} else {
tmp = pow(a, 3.0) * (a - 4.0);
}
return tmp;
}
public static double code(double a, double b) {
double t_0 = Math.pow(((a * a) + (b * b)), 2.0) + (4.0 * (((a * a) * (1.0 - a)) + ((b * b) * (a + 3.0))));
double tmp;
if (t_0 <= Double.POSITIVE_INFINITY) {
tmp = t_0 + -1.0;
} else {
tmp = Math.pow(a, 3.0) * (a - 4.0);
}
return tmp;
}
def code(a, b): t_0 = math.pow(((a * a) + (b * b)), 2.0) + (4.0 * (((a * a) * (1.0 - a)) + ((b * b) * (a + 3.0)))) tmp = 0 if t_0 <= math.inf: tmp = t_0 + -1.0 else: tmp = math.pow(a, 3.0) * (a - 4.0) return tmp
function code(a, b) t_0 = Float64((Float64(Float64(a * a) + Float64(b * b)) ^ 2.0) + Float64(4.0 * Float64(Float64(Float64(a * a) * Float64(1.0 - a)) + Float64(Float64(b * b) * Float64(a + 3.0))))) tmp = 0.0 if (t_0 <= Inf) tmp = Float64(t_0 + -1.0); else tmp = Float64((a ^ 3.0) * Float64(a - 4.0)); end return tmp end
function tmp_2 = code(a, b) t_0 = (((a * a) + (b * b)) ^ 2.0) + (4.0 * (((a * a) * (1.0 - a)) + ((b * b) * (a + 3.0)))); tmp = 0.0; if (t_0 <= Inf) tmp = t_0 + -1.0; else tmp = (a ^ 3.0) * (a - 4.0); end tmp_2 = tmp; end
code[a_, b_] := Block[{t$95$0 = N[(N[Power[N[(N[(a * a), $MachinePrecision] + N[(b * b), $MachinePrecision]), $MachinePrecision], 2.0], $MachinePrecision] + N[(4.0 * N[(N[(N[(a * a), $MachinePrecision] * N[(1.0 - a), $MachinePrecision]), $MachinePrecision] + N[(N[(b * b), $MachinePrecision] * N[(a + 3.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]}, If[LessEqual[t$95$0, Infinity], N[(t$95$0 + -1.0), $MachinePrecision], N[(N[Power[a, 3.0], $MachinePrecision] * N[(a - 4.0), $MachinePrecision]), $MachinePrecision]]]
\begin{array}{l}
\\
\begin{array}{l}
t_0 := {\left(a \cdot a + b \cdot b\right)}^{2} + 4 \cdot \left(\left(a \cdot a\right) \cdot \left(1 - a\right) + \left(b \cdot b\right) \cdot \left(a + 3\right)\right)\\
\mathbf{if}\;t\_0 \leq \infty:\\
\;\;\;\;t\_0 + -1\\
\mathbf{else}:\\
\;\;\;\;{a}^{3} \cdot \left(a - 4\right)\\
\end{array}
\end{array}
if (+.f64 (pow.f64 (+.f64 (*.f64 a a) (*.f64 b b)) #s(literal 2 binary64)) (*.f64 #s(literal 4 binary64) (+.f64 (*.f64 (*.f64 a a) (-.f64 #s(literal 1 binary64) a)) (*.f64 (*.f64 b b) (+.f64 #s(literal 3 binary64) a))))) < +inf.0Initial program 99.9%
if +inf.0 < (+.f64 (pow.f64 (+.f64 (*.f64 a a) (*.f64 b b)) #s(literal 2 binary64)) (*.f64 #s(literal 4 binary64) (+.f64 (*.f64 (*.f64 a a) (-.f64 #s(literal 1 binary64) a)) (*.f64 (*.f64 b b) (+.f64 #s(literal 3 binary64) a))))) Initial program 0.0%
associate--l+0.0%
fma-define0.0%
sqr-neg0.0%
fma-define0.0%
distribute-rgt-in0.0%
sqr-neg0.0%
distribute-rgt-in0.0%
fma-define0.0%
sqr-neg0.0%
Simplified5.6%
Taylor expanded in a around inf 94.7%
associate-*r/94.7%
metadata-eval94.7%
Simplified94.7%
Taylor expanded in a around 0 94.7%
Final simplification98.4%
(FPCore (a b) :precision binary64 (if (<= a -4.4e+17) (pow a 4.0) (if (<= a 4.7e+48) (+ (pow b 4.0) -1.0) (* (pow a 4.0) (- 1.0 (/ 4.0 a))))))
double code(double a, double b) {
double tmp;
if (a <= -4.4e+17) {
tmp = pow(a, 4.0);
} else if (a <= 4.7e+48) {
tmp = pow(b, 4.0) + -1.0;
} else {
tmp = pow(a, 4.0) * (1.0 - (4.0 / a));
}
return tmp;
}
real(8) function code(a, b)
real(8), intent (in) :: a
real(8), intent (in) :: b
real(8) :: tmp
if (a <= (-4.4d+17)) then
tmp = a ** 4.0d0
else if (a <= 4.7d+48) then
tmp = (b ** 4.0d0) + (-1.0d0)
else
tmp = (a ** 4.0d0) * (1.0d0 - (4.0d0 / a))
end if
code = tmp
end function
public static double code(double a, double b) {
double tmp;
if (a <= -4.4e+17) {
tmp = Math.pow(a, 4.0);
} else if (a <= 4.7e+48) {
tmp = Math.pow(b, 4.0) + -1.0;
} else {
tmp = Math.pow(a, 4.0) * (1.0 - (4.0 / a));
}
return tmp;
}
def code(a, b): tmp = 0 if a <= -4.4e+17: tmp = math.pow(a, 4.0) elif a <= 4.7e+48: tmp = math.pow(b, 4.0) + -1.0 else: tmp = math.pow(a, 4.0) * (1.0 - (4.0 / a)) return tmp
function code(a, b) tmp = 0.0 if (a <= -4.4e+17) tmp = a ^ 4.0; elseif (a <= 4.7e+48) tmp = Float64((b ^ 4.0) + -1.0); else tmp = Float64((a ^ 4.0) * Float64(1.0 - Float64(4.0 / a))); end return tmp end
function tmp_2 = code(a, b) tmp = 0.0; if (a <= -4.4e+17) tmp = a ^ 4.0; elseif (a <= 4.7e+48) tmp = (b ^ 4.0) + -1.0; else tmp = (a ^ 4.0) * (1.0 - (4.0 / a)); end tmp_2 = tmp; end
code[a_, b_] := If[LessEqual[a, -4.4e+17], N[Power[a, 4.0], $MachinePrecision], If[LessEqual[a, 4.7e+48], N[(N[Power[b, 4.0], $MachinePrecision] + -1.0), $MachinePrecision], N[(N[Power[a, 4.0], $MachinePrecision] * N[(1.0 - N[(4.0 / a), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;a \leq -4.4 \cdot 10^{+17}:\\
\;\;\;\;{a}^{4}\\
\mathbf{elif}\;a \leq 4.7 \cdot 10^{+48}:\\
\;\;\;\;{b}^{4} + -1\\
\mathbf{else}:\\
\;\;\;\;{a}^{4} \cdot \left(1 - \frac{4}{a}\right)\\
\end{array}
\end{array}
if a < -4.4e17Initial program 60.2%
associate--l+60.2%
fma-define60.2%
sqr-neg60.2%
fma-define60.2%
distribute-rgt-in60.2%
sqr-neg60.2%
distribute-rgt-in60.2%
fma-define60.2%
sqr-neg60.2%
Simplified60.2%
Taylor expanded in a around inf 94.7%
if -4.4e17 < a < 4.70000000000000012e48Initial program 98.5%
Taylor expanded in a around 0 97.2%
fma-define97.2%
Simplified97.2%
Taylor expanded in b around inf 96.4%
if 4.70000000000000012e48 < a Initial program 12.9%
associate--l+12.9%
fma-define12.9%
sqr-neg12.9%
fma-define12.9%
distribute-rgt-in12.9%
sqr-neg12.9%
distribute-rgt-in12.9%
fma-define12.9%
sqr-neg12.9%
Simplified20.3%
Taylor expanded in a around inf 98.3%
associate-*r/98.3%
metadata-eval98.3%
Simplified98.3%
Final simplification96.4%
(FPCore (a b) :precision binary64 (if (or (<= a -1.05e+18) (not (<= a 4.7e+48))) (pow a 4.0) (+ (pow b 4.0) -1.0)))
double code(double a, double b) {
double tmp;
if ((a <= -1.05e+18) || !(a <= 4.7e+48)) {
tmp = pow(a, 4.0);
} else {
tmp = pow(b, 4.0) + -1.0;
}
return tmp;
}
real(8) function code(a, b)
real(8), intent (in) :: a
real(8), intent (in) :: b
real(8) :: tmp
if ((a <= (-1.05d+18)) .or. (.not. (a <= 4.7d+48))) then
tmp = a ** 4.0d0
else
tmp = (b ** 4.0d0) + (-1.0d0)
end if
code = tmp
end function
public static double code(double a, double b) {
double tmp;
if ((a <= -1.05e+18) || !(a <= 4.7e+48)) {
tmp = Math.pow(a, 4.0);
} else {
tmp = Math.pow(b, 4.0) + -1.0;
}
return tmp;
}
def code(a, b): tmp = 0 if (a <= -1.05e+18) or not (a <= 4.7e+48): tmp = math.pow(a, 4.0) else: tmp = math.pow(b, 4.0) + -1.0 return tmp
function code(a, b) tmp = 0.0 if ((a <= -1.05e+18) || !(a <= 4.7e+48)) tmp = a ^ 4.0; else tmp = Float64((b ^ 4.0) + -1.0); end return tmp end
function tmp_2 = code(a, b) tmp = 0.0; if ((a <= -1.05e+18) || ~((a <= 4.7e+48))) tmp = a ^ 4.0; else tmp = (b ^ 4.0) + -1.0; end tmp_2 = tmp; end
code[a_, b_] := If[Or[LessEqual[a, -1.05e+18], N[Not[LessEqual[a, 4.7e+48]], $MachinePrecision]], N[Power[a, 4.0], $MachinePrecision], N[(N[Power[b, 4.0], $MachinePrecision] + -1.0), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;a \leq -1.05 \cdot 10^{+18} \lor \neg \left(a \leq 4.7 \cdot 10^{+48}\right):\\
\;\;\;\;{a}^{4}\\
\mathbf{else}:\\
\;\;\;\;{b}^{4} + -1\\
\end{array}
\end{array}
if a < -1.05e18 or 4.70000000000000012e48 < a Initial program 37.4%
associate--l+37.4%
fma-define37.4%
sqr-neg37.4%
fma-define37.4%
distribute-rgt-in37.4%
sqr-neg37.4%
distribute-rgt-in37.4%
fma-define37.4%
sqr-neg37.4%
Simplified41.0%
Taylor expanded in a around inf 96.4%
if -1.05e18 < a < 4.70000000000000012e48Initial program 98.5%
Taylor expanded in a around 0 97.2%
fma-define97.2%
Simplified97.2%
Taylor expanded in b around inf 96.4%
Final simplification96.4%
(FPCore (a b) :precision binary64 (if (or (<= a -2.7e+17) (not (<= a 3.7e+37))) (pow a 4.0) (+ (* (* b b) 12.0) -1.0)))
double code(double a, double b) {
double tmp;
if ((a <= -2.7e+17) || !(a <= 3.7e+37)) {
tmp = pow(a, 4.0);
} else {
tmp = ((b * b) * 12.0) + -1.0;
}
return tmp;
}
real(8) function code(a, b)
real(8), intent (in) :: a
real(8), intent (in) :: b
real(8) :: tmp
if ((a <= (-2.7d+17)) .or. (.not. (a <= 3.7d+37))) then
tmp = a ** 4.0d0
else
tmp = ((b * b) * 12.0d0) + (-1.0d0)
end if
code = tmp
end function
public static double code(double a, double b) {
double tmp;
if ((a <= -2.7e+17) || !(a <= 3.7e+37)) {
tmp = Math.pow(a, 4.0);
} else {
tmp = ((b * b) * 12.0) + -1.0;
}
return tmp;
}
def code(a, b): tmp = 0 if (a <= -2.7e+17) or not (a <= 3.7e+37): tmp = math.pow(a, 4.0) else: tmp = ((b * b) * 12.0) + -1.0 return tmp
function code(a, b) tmp = 0.0 if ((a <= -2.7e+17) || !(a <= 3.7e+37)) tmp = a ^ 4.0; else tmp = Float64(Float64(Float64(b * b) * 12.0) + -1.0); end return tmp end
function tmp_2 = code(a, b) tmp = 0.0; if ((a <= -2.7e+17) || ~((a <= 3.7e+37))) tmp = a ^ 4.0; else tmp = ((b * b) * 12.0) + -1.0; end tmp_2 = tmp; end
code[a_, b_] := If[Or[LessEqual[a, -2.7e+17], N[Not[LessEqual[a, 3.7e+37]], $MachinePrecision]], N[Power[a, 4.0], $MachinePrecision], N[(N[(N[(b * b), $MachinePrecision] * 12.0), $MachinePrecision] + -1.0), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;a \leq -2.7 \cdot 10^{+17} \lor \neg \left(a \leq 3.7 \cdot 10^{+37}\right):\\
\;\;\;\;{a}^{4}\\
\mathbf{else}:\\
\;\;\;\;\left(b \cdot b\right) \cdot 12 + -1\\
\end{array}
\end{array}
if a < -2.7e17 or 3.6999999999999999e37 < a Initial program 39.0%
associate--l+39.0%
fma-define39.0%
sqr-neg39.0%
fma-define39.0%
distribute-rgt-in39.0%
sqr-neg39.0%
distribute-rgt-in39.0%
fma-define39.0%
sqr-neg39.0%
Simplified42.5%
Taylor expanded in a around inf 94.9%
if -2.7e17 < a < 3.6999999999999999e37Initial program 98.5%
Taylor expanded in a around 0 97.9%
fma-define97.9%
Simplified97.9%
Taylor expanded in b around 0 80.1%
unpow280.1%
Applied egg-rr80.1%
Final simplification86.8%
(FPCore (a b) :precision binary64 (+ (* (* b b) 12.0) -1.0))
double code(double a, double b) {
return ((b * b) * 12.0) + -1.0;
}
real(8) function code(a, b)
real(8), intent (in) :: a
real(8), intent (in) :: b
code = ((b * b) * 12.0d0) + (-1.0d0)
end function
public static double code(double a, double b) {
return ((b * b) * 12.0) + -1.0;
}
def code(a, b): return ((b * b) * 12.0) + -1.0
function code(a, b) return Float64(Float64(Float64(b * b) * 12.0) + -1.0) end
function tmp = code(a, b) tmp = ((b * b) * 12.0) + -1.0; end
code[a_, b_] := N[(N[(N[(b * b), $MachinePrecision] * 12.0), $MachinePrecision] + -1.0), $MachinePrecision]
\begin{array}{l}
\\
\left(b \cdot b\right) \cdot 12 + -1
\end{array}
Initial program 71.8%
Taylor expanded in a around 0 72.2%
fma-define72.2%
Simplified72.2%
Taylor expanded in b around 0 55.4%
unpow255.4%
Applied egg-rr55.4%
Final simplification55.4%
herbie shell --seed 2024080
(FPCore (a b)
:name "Bouland and Aaronson, Equation (24)"
:precision binary64
(- (+ (pow (+ (* a a) (* b b)) 2.0) (* 4.0 (+ (* (* a a) (- 1.0 a)) (* (* b b) (+ 3.0 a))))) 1.0))