
(FPCore (x y z t) :precision binary64 (+ x (* (- y x) (/ z t))))
double code(double x, double y, double z, double t) {
return x + ((y - x) * (z / t));
}
real(8) function code(x, y, z, t)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8), intent (in) :: t
code = x + ((y - x) * (z / t))
end function
public static double code(double x, double y, double z, double t) {
return x + ((y - x) * (z / t));
}
def code(x, y, z, t): return x + ((y - x) * (z / t))
function code(x, y, z, t) return Float64(x + Float64(Float64(y - x) * Float64(z / t))) end
function tmp = code(x, y, z, t) tmp = x + ((y - x) * (z / t)); end
code[x_, y_, z_, t_] := N[(x + N[(N[(y - x), $MachinePrecision] * N[(z / t), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
x + \left(y - x\right) \cdot \frac{z}{t}
\end{array}
Sampling outcomes in binary64 precision:
Herbie found 6 alternatives:
| Alternative | Accuracy | Speedup |
|---|
(FPCore (x y z t) :precision binary64 (+ x (* (- y x) (/ z t))))
double code(double x, double y, double z, double t) {
return x + ((y - x) * (z / t));
}
real(8) function code(x, y, z, t)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8), intent (in) :: t
code = x + ((y - x) * (z / t))
end function
public static double code(double x, double y, double z, double t) {
return x + ((y - x) * (z / t));
}
def code(x, y, z, t): return x + ((y - x) * (z / t))
function code(x, y, z, t) return Float64(x + Float64(Float64(y - x) * Float64(z / t))) end
function tmp = code(x, y, z, t) tmp = x + ((y - x) * (z / t)); end
code[x_, y_, z_, t_] := N[(x + N[(N[(y - x), $MachinePrecision] * N[(z / t), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
x + \left(y - x\right) \cdot \frac{z}{t}
\end{array}
(FPCore (x y z t) :precision binary64 (fma (/ z t) (- y x) x))
double code(double x, double y, double z, double t) {
return fma((z / t), (y - x), x);
}
function code(x, y, z, t) return fma(Float64(z / t), Float64(y - x), x) end
code[x_, y_, z_, t_] := N[(N[(z / t), $MachinePrecision] * N[(y - x), $MachinePrecision] + x), $MachinePrecision]
\begin{array}{l}
\\
\mathsf{fma}\left(\frac{z}{t}, y - x, x\right)
\end{array}
Initial program 99.1%
+-commutativeN/A
*-commutativeN/A
accelerator-lowering-fma.f64N/A
/-lowering-/.f64N/A
--lowering--.f6499.1
Applied egg-rr99.1%
(FPCore (x y z t) :precision binary64 (let* ((t_1 (* (/ z t) y))) (if (<= (/ z t) -1e-35) t_1 (if (<= (/ z t) 5e-50) x t_1))))
double code(double x, double y, double z, double t) {
double t_1 = (z / t) * y;
double tmp;
if ((z / t) <= -1e-35) {
tmp = t_1;
} else if ((z / t) <= 5e-50) {
tmp = x;
} else {
tmp = t_1;
}
return tmp;
}
real(8) function code(x, y, z, t)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8), intent (in) :: t
real(8) :: t_1
real(8) :: tmp
t_1 = (z / t) * y
if ((z / t) <= (-1d-35)) then
tmp = t_1
else if ((z / t) <= 5d-50) then
tmp = x
else
tmp = t_1
end if
code = tmp
end function
public static double code(double x, double y, double z, double t) {
double t_1 = (z / t) * y;
double tmp;
if ((z / t) <= -1e-35) {
tmp = t_1;
} else if ((z / t) <= 5e-50) {
tmp = x;
} else {
tmp = t_1;
}
return tmp;
}
def code(x, y, z, t): t_1 = (z / t) * y tmp = 0 if (z / t) <= -1e-35: tmp = t_1 elif (z / t) <= 5e-50: tmp = x else: tmp = t_1 return tmp
function code(x, y, z, t) t_1 = Float64(Float64(z / t) * y) tmp = 0.0 if (Float64(z / t) <= -1e-35) tmp = t_1; elseif (Float64(z / t) <= 5e-50) tmp = x; else tmp = t_1; end return tmp end
function tmp_2 = code(x, y, z, t) t_1 = (z / t) * y; tmp = 0.0; if ((z / t) <= -1e-35) tmp = t_1; elseif ((z / t) <= 5e-50) tmp = x; else tmp = t_1; end tmp_2 = tmp; end
code[x_, y_, z_, t_] := Block[{t$95$1 = N[(N[(z / t), $MachinePrecision] * y), $MachinePrecision]}, If[LessEqual[N[(z / t), $MachinePrecision], -1e-35], t$95$1, If[LessEqual[N[(z / t), $MachinePrecision], 5e-50], x, t$95$1]]]
\begin{array}{l}
\\
\begin{array}{l}
t_1 := \frac{z}{t} \cdot y\\
\mathbf{if}\;\frac{z}{t} \leq -1 \cdot 10^{-35}:\\
\;\;\;\;t\_1\\
\mathbf{elif}\;\frac{z}{t} \leq 5 \cdot 10^{-50}:\\
\;\;\;\;x\\
\mathbf{else}:\\
\;\;\;\;t\_1\\
\end{array}
\end{array}
if (/.f64 z t) < -1.00000000000000001e-35 or 4.99999999999999968e-50 < (/.f64 z t) Initial program 98.5%
Taylor expanded in x around 0
+-rgt-identityN/A
associate-/l*N/A
accelerator-lowering-fma.f64N/A
/-lowering-/.f6455.4
Simplified55.4%
+-rgt-identityN/A
*-commutativeN/A
*-lowering-*.f64N/A
/-lowering-/.f6455.4
Applied egg-rr55.4%
if -1.00000000000000001e-35 < (/.f64 z t) < 4.99999999999999968e-50Initial program 99.9%
Taylor expanded in z around 0
Simplified79.6%
(FPCore (x y z t) :precision binary64 (let* ((t_1 (* z (/ y t)))) (if (<= (/ z t) -2e-8) t_1 (if (<= (/ z t) 5e-11) x t_1))))
double code(double x, double y, double z, double t) {
double t_1 = z * (y / t);
double tmp;
if ((z / t) <= -2e-8) {
tmp = t_1;
} else if ((z / t) <= 5e-11) {
tmp = x;
} else {
tmp = t_1;
}
return tmp;
}
real(8) function code(x, y, z, t)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8), intent (in) :: t
real(8) :: t_1
real(8) :: tmp
t_1 = z * (y / t)
if ((z / t) <= (-2d-8)) then
tmp = t_1
else if ((z / t) <= 5d-11) then
tmp = x
else
tmp = t_1
end if
code = tmp
end function
public static double code(double x, double y, double z, double t) {
double t_1 = z * (y / t);
double tmp;
if ((z / t) <= -2e-8) {
tmp = t_1;
} else if ((z / t) <= 5e-11) {
tmp = x;
} else {
tmp = t_1;
}
return tmp;
}
def code(x, y, z, t): t_1 = z * (y / t) tmp = 0 if (z / t) <= -2e-8: tmp = t_1 elif (z / t) <= 5e-11: tmp = x else: tmp = t_1 return tmp
function code(x, y, z, t) t_1 = Float64(z * Float64(y / t)) tmp = 0.0 if (Float64(z / t) <= -2e-8) tmp = t_1; elseif (Float64(z / t) <= 5e-11) tmp = x; else tmp = t_1; end return tmp end
function tmp_2 = code(x, y, z, t) t_1 = z * (y / t); tmp = 0.0; if ((z / t) <= -2e-8) tmp = t_1; elseif ((z / t) <= 5e-11) tmp = x; else tmp = t_1; end tmp_2 = tmp; end
code[x_, y_, z_, t_] := Block[{t$95$1 = N[(z * N[(y / t), $MachinePrecision]), $MachinePrecision]}, If[LessEqual[N[(z / t), $MachinePrecision], -2e-8], t$95$1, If[LessEqual[N[(z / t), $MachinePrecision], 5e-11], x, t$95$1]]]
\begin{array}{l}
\\
\begin{array}{l}
t_1 := z \cdot \frac{y}{t}\\
\mathbf{if}\;\frac{z}{t} \leq -2 \cdot 10^{-8}:\\
\;\;\;\;t\_1\\
\mathbf{elif}\;\frac{z}{t} \leq 5 \cdot 10^{-11}:\\
\;\;\;\;x\\
\mathbf{else}:\\
\;\;\;\;t\_1\\
\end{array}
\end{array}
if (/.f64 z t) < -2e-8 or 5.00000000000000018e-11 < (/.f64 z t) Initial program 98.4%
Taylor expanded in x around 0
+-rgt-identityN/A
associate-/l*N/A
accelerator-lowering-fma.f64N/A
/-lowering-/.f6455.7
Simplified55.7%
+-rgt-identityN/A
associate-*r/N/A
associate-*l/N/A
*-lowering-*.f64N/A
/-lowering-/.f6450.8
Applied egg-rr50.8%
if -2e-8 < (/.f64 z t) < 5.00000000000000018e-11Initial program 99.9%
Taylor expanded in z around 0
Simplified76.0%
Final simplification62.8%
(FPCore (x y z t) :precision binary64 (fma (/ z t) y x))
double code(double x, double y, double z, double t) {
return fma((z / t), y, x);
}
function code(x, y, z, t) return fma(Float64(z / t), y, x) end
code[x_, y_, z_, t_] := N[(N[(z / t), $MachinePrecision] * y + x), $MachinePrecision]
\begin{array}{l}
\\
\mathsf{fma}\left(\frac{z}{t}, y, x\right)
\end{array}
Initial program 99.1%
Taylor expanded in y around inf
Simplified77.1%
+-commutativeN/A
*-commutativeN/A
accelerator-lowering-fma.f64N/A
/-lowering-/.f6477.1
Applied egg-rr77.1%
(FPCore (x y z t) :precision binary64 (fma (/ y t) z x))
double code(double x, double y, double z, double t) {
return fma((y / t), z, x);
}
function code(x, y, z, t) return fma(Float64(y / t), z, x) end
code[x_, y_, z_, t_] := N[(N[(y / t), $MachinePrecision] * z + x), $MachinePrecision]
\begin{array}{l}
\\
\mathsf{fma}\left(\frac{y}{t}, z, x\right)
\end{array}
Initial program 99.1%
Taylor expanded in y around inf
Simplified77.1%
+-commutativeN/A
clear-numN/A
associate-/r/N/A
associate-*r*N/A
div-invN/A
accelerator-lowering-fma.f64N/A
/-lowering-/.f6473.1
Applied egg-rr73.1%
(FPCore (x y z t) :precision binary64 x)
double code(double x, double y, double z, double t) {
return x;
}
real(8) function code(x, y, z, t)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8), intent (in) :: t
code = x
end function
public static double code(double x, double y, double z, double t) {
return x;
}
def code(x, y, z, t): return x
function code(x, y, z, t) return x end
function tmp = code(x, y, z, t) tmp = x; end
code[x_, y_, z_, t_] := x
\begin{array}{l}
\\
x
\end{array}
Initial program 99.1%
Taylor expanded in z around 0
Simplified38.1%
(FPCore (x y z t)
:precision binary64
(let* ((t_1 (* (- y x) (/ z t))) (t_2 (+ x (/ (- y x) (/ t z)))))
(if (< t_1 -1013646692435.8867)
t_2
(if (< t_1 0.0) (+ x (/ (* (- y x) z) t)) t_2))))
double code(double x, double y, double z, double t) {
double t_1 = (y - x) * (z / t);
double t_2 = x + ((y - x) / (t / z));
double tmp;
if (t_1 < -1013646692435.8867) {
tmp = t_2;
} else if (t_1 < 0.0) {
tmp = x + (((y - x) * z) / t);
} else {
tmp = t_2;
}
return tmp;
}
real(8) function code(x, y, z, t)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8), intent (in) :: t
real(8) :: t_1
real(8) :: t_2
real(8) :: tmp
t_1 = (y - x) * (z / t)
t_2 = x + ((y - x) / (t / z))
if (t_1 < (-1013646692435.8867d0)) then
tmp = t_2
else if (t_1 < 0.0d0) then
tmp = x + (((y - x) * z) / t)
else
tmp = t_2
end if
code = tmp
end function
public static double code(double x, double y, double z, double t) {
double t_1 = (y - x) * (z / t);
double t_2 = x + ((y - x) / (t / z));
double tmp;
if (t_1 < -1013646692435.8867) {
tmp = t_2;
} else if (t_1 < 0.0) {
tmp = x + (((y - x) * z) / t);
} else {
tmp = t_2;
}
return tmp;
}
def code(x, y, z, t): t_1 = (y - x) * (z / t) t_2 = x + ((y - x) / (t / z)) tmp = 0 if t_1 < -1013646692435.8867: tmp = t_2 elif t_1 < 0.0: tmp = x + (((y - x) * z) / t) else: tmp = t_2 return tmp
function code(x, y, z, t) t_1 = Float64(Float64(y - x) * Float64(z / t)) t_2 = Float64(x + Float64(Float64(y - x) / Float64(t / z))) tmp = 0.0 if (t_1 < -1013646692435.8867) tmp = t_2; elseif (t_1 < 0.0) tmp = Float64(x + Float64(Float64(Float64(y - x) * z) / t)); else tmp = t_2; end return tmp end
function tmp_2 = code(x, y, z, t) t_1 = (y - x) * (z / t); t_2 = x + ((y - x) / (t / z)); tmp = 0.0; if (t_1 < -1013646692435.8867) tmp = t_2; elseif (t_1 < 0.0) tmp = x + (((y - x) * z) / t); else tmp = t_2; end tmp_2 = tmp; end
code[x_, y_, z_, t_] := Block[{t$95$1 = N[(N[(y - x), $MachinePrecision] * N[(z / t), $MachinePrecision]), $MachinePrecision]}, Block[{t$95$2 = N[(x + N[(N[(y - x), $MachinePrecision] / N[(t / z), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]}, If[Less[t$95$1, -1013646692435.8867], t$95$2, If[Less[t$95$1, 0.0], N[(x + N[(N[(N[(y - x), $MachinePrecision] * z), $MachinePrecision] / t), $MachinePrecision]), $MachinePrecision], t$95$2]]]]
\begin{array}{l}
\\
\begin{array}{l}
t_1 := \left(y - x\right) \cdot \frac{z}{t}\\
t_2 := x + \frac{y - x}{\frac{t}{z}}\\
\mathbf{if}\;t\_1 < -1013646692435.8867:\\
\;\;\;\;t\_2\\
\mathbf{elif}\;t\_1 < 0:\\
\;\;\;\;x + \frac{\left(y - x\right) \cdot z}{t}\\
\mathbf{else}:\\
\;\;\;\;t\_2\\
\end{array}
\end{array}
herbie shell --seed 2024196
(FPCore (x y z t)
:name "Graphics.Rendering.Plot.Render.Plot.Axis:tickPosition from plot-0.2.3.4"
:precision binary64
:alt
(! :herbie-platform default (if (< (* (- y x) (/ z t)) -10136466924358867/10000) (+ x (/ (- y x) (/ t z))) (if (< (* (- y x) (/ z t)) 0) (+ x (/ (* (- y x) z) t)) (+ x (/ (- y x) (/ t z))))))
(+ x (* (- y x) (/ z t))))