
(FPCore (x y z) :precision binary64 (/ (* x (- y z)) y))
double code(double x, double y, double z) {
return (x * (y - z)) / y;
}
real(8) function code(x, y, z)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
code = (x * (y - z)) / y
end function
public static double code(double x, double y, double z) {
return (x * (y - z)) / y;
}
def code(x, y, z): return (x * (y - z)) / y
function code(x, y, z) return Float64(Float64(x * Float64(y - z)) / y) end
function tmp = code(x, y, z) tmp = (x * (y - z)) / y; end
code[x_, y_, z_] := N[(N[(x * N[(y - z), $MachinePrecision]), $MachinePrecision] / y), $MachinePrecision]
\begin{array}{l}
\\
\frac{x \cdot \left(y - z\right)}{y}
\end{array}
Sampling outcomes in binary64 precision:
Herbie found 5 alternatives:
| Alternative | Accuracy | Speedup |
|---|
(FPCore (x y z) :precision binary64 (/ (* x (- y z)) y))
double code(double x, double y, double z) {
return (x * (y - z)) / y;
}
real(8) function code(x, y, z)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
code = (x * (y - z)) / y
end function
public static double code(double x, double y, double z) {
return (x * (y - z)) / y;
}
def code(x, y, z): return (x * (y - z)) / y
function code(x, y, z) return Float64(Float64(x * Float64(y - z)) / y) end
function tmp = code(x, y, z) tmp = (x * (y - z)) / y; end
code[x_, y_, z_] := N[(N[(x * N[(y - z), $MachinePrecision]), $MachinePrecision] / y), $MachinePrecision]
\begin{array}{l}
\\
\frac{x \cdot \left(y - z\right)}{y}
\end{array}
(FPCore (x y z) :precision binary64 (* x (- 1.0 (/ z y))))
double code(double x, double y, double z) {
return x * (1.0 - (z / y));
}
real(8) function code(x, y, z)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
code = x * (1.0d0 - (z / y))
end function
public static double code(double x, double y, double z) {
return x * (1.0 - (z / y));
}
def code(x, y, z): return x * (1.0 - (z / y))
function code(x, y, z) return Float64(x * Float64(1.0 - Float64(z / y))) end
function tmp = code(x, y, z) tmp = x * (1.0 - (z / y)); end
code[x_, y_, z_] := N[(x * N[(1.0 - N[(z / y), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
x \cdot \left(1 - \frac{z}{y}\right)
\end{array}
Initial program 84.7%
remove-double-neg84.7%
distribute-frac-neg284.7%
distribute-frac-neg84.7%
distribute-rgt-neg-in84.7%
associate-/l*97.7%
distribute-frac-neg97.7%
distribute-frac-neg297.7%
remove-double-neg97.7%
div-sub97.7%
*-inverses97.7%
Simplified97.7%
(FPCore (x y z) :precision binary64 (if (<= y -4.7e-29) x (if (<= y 1.98e-16) (/ z (/ y (- x))) x)))
double code(double x, double y, double z) {
double tmp;
if (y <= -4.7e-29) {
tmp = x;
} else if (y <= 1.98e-16) {
tmp = z / (y / -x);
} else {
tmp = x;
}
return tmp;
}
real(8) function code(x, y, z)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8) :: tmp
if (y <= (-4.7d-29)) then
tmp = x
else if (y <= 1.98d-16) then
tmp = z / (y / -x)
else
tmp = x
end if
code = tmp
end function
public static double code(double x, double y, double z) {
double tmp;
if (y <= -4.7e-29) {
tmp = x;
} else if (y <= 1.98e-16) {
tmp = z / (y / -x);
} else {
tmp = x;
}
return tmp;
}
def code(x, y, z): tmp = 0 if y <= -4.7e-29: tmp = x elif y <= 1.98e-16: tmp = z / (y / -x) else: tmp = x return tmp
function code(x, y, z) tmp = 0.0 if (y <= -4.7e-29) tmp = x; elseif (y <= 1.98e-16) tmp = Float64(z / Float64(y / Float64(-x))); else tmp = x; end return tmp end
function tmp_2 = code(x, y, z) tmp = 0.0; if (y <= -4.7e-29) tmp = x; elseif (y <= 1.98e-16) tmp = z / (y / -x); else tmp = x; end tmp_2 = tmp; end
code[x_, y_, z_] := If[LessEqual[y, -4.7e-29], x, If[LessEqual[y, 1.98e-16], N[(z / N[(y / (-x)), $MachinePrecision]), $MachinePrecision], x]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;y \leq -4.7 \cdot 10^{-29}:\\
\;\;\;\;x\\
\mathbf{elif}\;y \leq 1.98 \cdot 10^{-16}:\\
\;\;\;\;\frac{z}{\frac{y}{-x}}\\
\mathbf{else}:\\
\;\;\;\;x\\
\end{array}
\end{array}
if y < -4.6999999999999998e-29 or 1.97999999999999988e-16 < y Initial program 78.9%
remove-double-neg78.9%
distribute-frac-neg278.9%
distribute-frac-neg78.9%
distribute-rgt-neg-in78.9%
associate-/l*99.9%
distribute-frac-neg99.9%
distribute-frac-neg299.9%
remove-double-neg99.9%
div-sub99.9%
*-inverses99.9%
Simplified99.9%
Taylor expanded in z around 0 76.5%
if -4.6999999999999998e-29 < y < 1.97999999999999988e-16Initial program 92.0%
remove-double-neg92.0%
distribute-frac-neg292.0%
distribute-frac-neg92.0%
distribute-rgt-neg-in92.0%
associate-/l*94.9%
distribute-frac-neg94.9%
distribute-frac-neg294.9%
remove-double-neg94.9%
div-sub94.9%
*-inverses94.9%
Simplified94.9%
Taylor expanded in z around inf 77.5%
mul-1-neg77.5%
distribute-frac-neg277.5%
Simplified77.5%
clear-num77.3%
un-div-inv77.5%
add-sqr-sqrt35.5%
sqrt-unprod20.3%
sqr-neg20.3%
sqrt-unprod0.6%
add-sqr-sqrt1.5%
Applied egg-rr1.5%
associate-/r/1.5%
*-commutative1.5%
Simplified1.5%
add-sqr-sqrt1.0%
sqrt-unprod32.5%
swap-sqr25.2%
sqr-neg25.2%
distribute-frac-neg25.2%
distribute-frac-neg25.2%
swap-sqr32.5%
sqrt-unprod36.6%
add-sqr-sqrt78.0%
distribute-frac-neg78.0%
distribute-rgt-neg-out78.0%
clear-num77.8%
un-div-inv78.8%
Applied egg-rr78.8%
Final simplification77.5%
(FPCore (x y z) :precision binary64 (if (<= x 1e+182) x (/ y (/ y x))))
double code(double x, double y, double z) {
double tmp;
if (x <= 1e+182) {
tmp = x;
} else {
tmp = y / (y / x);
}
return tmp;
}
real(8) function code(x, y, z)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8) :: tmp
if (x <= 1d+182) then
tmp = x
else
tmp = y / (y / x)
end if
code = tmp
end function
public static double code(double x, double y, double z) {
double tmp;
if (x <= 1e+182) {
tmp = x;
} else {
tmp = y / (y / x);
}
return tmp;
}
def code(x, y, z): tmp = 0 if x <= 1e+182: tmp = x else: tmp = y / (y / x) return tmp
function code(x, y, z) tmp = 0.0 if (x <= 1e+182) tmp = x; else tmp = Float64(y / Float64(y / x)); end return tmp end
function tmp_2 = code(x, y, z) tmp = 0.0; if (x <= 1e+182) tmp = x; else tmp = y / (y / x); end tmp_2 = tmp; end
code[x_, y_, z_] := If[LessEqual[x, 1e+182], x, N[(y / N[(y / x), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq 10^{+182}:\\
\;\;\;\;x\\
\mathbf{else}:\\
\;\;\;\;\frac{y}{\frac{y}{x}}\\
\end{array}
\end{array}
if x < 1.0000000000000001e182Initial program 85.6%
remove-double-neg85.6%
distribute-frac-neg285.6%
distribute-frac-neg85.6%
distribute-rgt-neg-in85.6%
associate-/l*97.4%
distribute-frac-neg97.4%
distribute-frac-neg297.4%
remove-double-neg97.4%
div-sub97.5%
*-inverses97.5%
Simplified97.5%
Taylor expanded in z around 0 52.7%
if 1.0000000000000001e182 < x Initial program 74.5%
Taylor expanded in y around inf 15.1%
*-commutative15.1%
associate-/l*46.4%
Applied egg-rr46.4%
clear-num46.4%
un-div-inv48.3%
Applied egg-rr48.3%
(FPCore (x y z) :precision binary64 (if (<= x 1.28e+182) x (* y (/ x y))))
double code(double x, double y, double z) {
double tmp;
if (x <= 1.28e+182) {
tmp = x;
} else {
tmp = y * (x / y);
}
return tmp;
}
real(8) function code(x, y, z)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8) :: tmp
if (x <= 1.28d+182) then
tmp = x
else
tmp = y * (x / y)
end if
code = tmp
end function
public static double code(double x, double y, double z) {
double tmp;
if (x <= 1.28e+182) {
tmp = x;
} else {
tmp = y * (x / y);
}
return tmp;
}
def code(x, y, z): tmp = 0 if x <= 1.28e+182: tmp = x else: tmp = y * (x / y) return tmp
function code(x, y, z) tmp = 0.0 if (x <= 1.28e+182) tmp = x; else tmp = Float64(y * Float64(x / y)); end return tmp end
function tmp_2 = code(x, y, z) tmp = 0.0; if (x <= 1.28e+182) tmp = x; else tmp = y * (x / y); end tmp_2 = tmp; end
code[x_, y_, z_] := If[LessEqual[x, 1.28e+182], x, N[(y * N[(x / y), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq 1.28 \cdot 10^{+182}:\\
\;\;\;\;x\\
\mathbf{else}:\\
\;\;\;\;y \cdot \frac{x}{y}\\
\end{array}
\end{array}
if x < 1.28e182Initial program 85.6%
remove-double-neg85.6%
distribute-frac-neg285.6%
distribute-frac-neg85.6%
distribute-rgt-neg-in85.6%
associate-/l*97.4%
distribute-frac-neg97.4%
distribute-frac-neg297.4%
remove-double-neg97.4%
div-sub97.5%
*-inverses97.5%
Simplified97.5%
Taylor expanded in z around 0 52.7%
if 1.28e182 < x Initial program 74.5%
Taylor expanded in y around inf 15.1%
*-commutative15.1%
associate-/l*46.4%
Applied egg-rr46.4%
(FPCore (x y z) :precision binary64 x)
double code(double x, double y, double z) {
return x;
}
real(8) function code(x, y, z)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
code = x
end function
public static double code(double x, double y, double z) {
return x;
}
def code(x, y, z): return x
function code(x, y, z) return x end
function tmp = code(x, y, z) tmp = x; end
code[x_, y_, z_] := x
\begin{array}{l}
\\
x
\end{array}
Initial program 84.7%
remove-double-neg84.7%
distribute-frac-neg284.7%
distribute-frac-neg84.7%
distribute-rgt-neg-in84.7%
associate-/l*97.7%
distribute-frac-neg97.7%
distribute-frac-neg297.7%
remove-double-neg97.7%
div-sub97.7%
*-inverses97.7%
Simplified97.7%
Taylor expanded in z around 0 51.7%
(FPCore (x y z) :precision binary64 (if (< z -2.060202331921739e+104) (- x (/ (* z x) y)) (if (< z 1.6939766013828526e+213) (/ x (/ y (- y z))) (* (- y z) (/ x y)))))
double code(double x, double y, double z) {
double tmp;
if (z < -2.060202331921739e+104) {
tmp = x - ((z * x) / y);
} else if (z < 1.6939766013828526e+213) {
tmp = x / (y / (y - z));
} else {
tmp = (y - z) * (x / y);
}
return tmp;
}
real(8) function code(x, y, z)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8) :: tmp
if (z < (-2.060202331921739d+104)) then
tmp = x - ((z * x) / y)
else if (z < 1.6939766013828526d+213) then
tmp = x / (y / (y - z))
else
tmp = (y - z) * (x / y)
end if
code = tmp
end function
public static double code(double x, double y, double z) {
double tmp;
if (z < -2.060202331921739e+104) {
tmp = x - ((z * x) / y);
} else if (z < 1.6939766013828526e+213) {
tmp = x / (y / (y - z));
} else {
tmp = (y - z) * (x / y);
}
return tmp;
}
def code(x, y, z): tmp = 0 if z < -2.060202331921739e+104: tmp = x - ((z * x) / y) elif z < 1.6939766013828526e+213: tmp = x / (y / (y - z)) else: tmp = (y - z) * (x / y) return tmp
function code(x, y, z) tmp = 0.0 if (z < -2.060202331921739e+104) tmp = Float64(x - Float64(Float64(z * x) / y)); elseif (z < 1.6939766013828526e+213) tmp = Float64(x / Float64(y / Float64(y - z))); else tmp = Float64(Float64(y - z) * Float64(x / y)); end return tmp end
function tmp_2 = code(x, y, z) tmp = 0.0; if (z < -2.060202331921739e+104) tmp = x - ((z * x) / y); elseif (z < 1.6939766013828526e+213) tmp = x / (y / (y - z)); else tmp = (y - z) * (x / y); end tmp_2 = tmp; end
code[x_, y_, z_] := If[Less[z, -2.060202331921739e+104], N[(x - N[(N[(z * x), $MachinePrecision] / y), $MachinePrecision]), $MachinePrecision], If[Less[z, 1.6939766013828526e+213], N[(x / N[(y / N[(y - z), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], N[(N[(y - z), $MachinePrecision] * N[(x / y), $MachinePrecision]), $MachinePrecision]]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;z < -2.060202331921739 \cdot 10^{+104}:\\
\;\;\;\;x - \frac{z \cdot x}{y}\\
\mathbf{elif}\;z < 1.6939766013828526 \cdot 10^{+213}:\\
\;\;\;\;\frac{x}{\frac{y}{y - z}}\\
\mathbf{else}:\\
\;\;\;\;\left(y - z\right) \cdot \frac{x}{y}\\
\end{array}
\end{array}
herbie shell --seed 2024103
(FPCore (x y z)
:name "Diagrams.Backend.Cairo.Internal:setTexture from diagrams-cairo-1.3.0.3"
:precision binary64
:alt
(if (< z -2.060202331921739e+104) (- x (/ (* z x) y)) (if (< z 1.6939766013828526e+213) (/ x (/ y (- y z))) (* (- y z) (/ x y))))
(/ (* x (- y z)) y))