
(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(Float64(y - x) * 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[(N[(y - x), $MachinePrecision] * z), $MachinePrecision] / t), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
x + \frac{\left(y - x\right) \cdot z}{t}
\end{array}
Sampling outcomes in binary64 precision:
Herbie found 8 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(Float64(y - x) * 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[(N[(y - x), $MachinePrecision] * z), $MachinePrecision] / t), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
x + \frac{\left(y - x\right) \cdot z}{t}
\end{array}
(FPCore (x y z t) :precision binary64 (fma (- y x) (/ z t) x))
double code(double x, double y, double z, double t) {
return fma((y - x), (z / t), x);
}
function code(x, y, z, t) return fma(Float64(y - x), Float64(z / t), x) end
code[x_, y_, z_, t_] := N[(N[(y - x), $MachinePrecision] * N[(z / t), $MachinePrecision] + x), $MachinePrecision]
\begin{array}{l}
\\
\mathsf{fma}\left(y - x, \frac{z}{t}, x\right)
\end{array}
Initial program 92.4%
+-commutative92.4%
associate-/l*98.6%
fma-define98.6%
Simplified98.6%
(FPCore (x y z t) :precision binary64 (if (or (<= y -58000.0) (not (<= y 3200.0))) (+ x (* y (/ z t))) (* x (- 1.0 (/ z t)))))
double code(double x, double y, double z, double t) {
double tmp;
if ((y <= -58000.0) || !(y <= 3200.0)) {
tmp = x + (y * (z / t));
} else {
tmp = x * (1.0 - (z / t));
}
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) :: tmp
if ((y <= (-58000.0d0)) .or. (.not. (y <= 3200.0d0))) then
tmp = x + (y * (z / t))
else
tmp = x * (1.0d0 - (z / t))
end if
code = tmp
end function
public static double code(double x, double y, double z, double t) {
double tmp;
if ((y <= -58000.0) || !(y <= 3200.0)) {
tmp = x + (y * (z / t));
} else {
tmp = x * (1.0 - (z / t));
}
return tmp;
}
def code(x, y, z, t): tmp = 0 if (y <= -58000.0) or not (y <= 3200.0): tmp = x + (y * (z / t)) else: tmp = x * (1.0 - (z / t)) return tmp
function code(x, y, z, t) tmp = 0.0 if ((y <= -58000.0) || !(y <= 3200.0)) tmp = Float64(x + Float64(y * Float64(z / t))); else tmp = Float64(x * Float64(1.0 - Float64(z / t))); end return tmp end
function tmp_2 = code(x, y, z, t) tmp = 0.0; if ((y <= -58000.0) || ~((y <= 3200.0))) tmp = x + (y * (z / t)); else tmp = x * (1.0 - (z / t)); end tmp_2 = tmp; end
code[x_, y_, z_, t_] := If[Or[LessEqual[y, -58000.0], N[Not[LessEqual[y, 3200.0]], $MachinePrecision]], N[(x + N[(y * N[(z / t), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], N[(x * N[(1.0 - N[(z / t), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;y \leq -58000 \lor \neg \left(y \leq 3200\right):\\
\;\;\;\;x + y \cdot \frac{z}{t}\\
\mathbf{else}:\\
\;\;\;\;x \cdot \left(1 - \frac{z}{t}\right)\\
\end{array}
\end{array}
if y < -58000 or 3200 < y Initial program 90.9%
associate-/l*98.7%
Simplified98.7%
Taylor expanded in y around inf 86.3%
associate-*r/91.9%
Simplified91.9%
if -58000 < y < 3200Initial program 94.0%
associate-/l*98.5%
Simplified98.5%
Taylor expanded in x around inf 88.4%
mul-1-neg88.4%
unsub-neg88.4%
Simplified88.4%
Final simplification90.1%
(FPCore (x y z t) :precision binary64 (if (<= y -37.0) (+ x (/ (* y z) t)) (if (<= y 330000.0) (* x (- 1.0 (/ z t))) (+ x (* y (/ z t))))))
double code(double x, double y, double z, double t) {
double tmp;
if (y <= -37.0) {
tmp = x + ((y * z) / t);
} else if (y <= 330000.0) {
tmp = x * (1.0 - (z / t));
} else {
tmp = x + (y * (z / t));
}
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) :: tmp
if (y <= (-37.0d0)) then
tmp = x + ((y * z) / t)
else if (y <= 330000.0d0) then
tmp = x * (1.0d0 - (z / t))
else
tmp = x + (y * (z / t))
end if
code = tmp
end function
public static double code(double x, double y, double z, double t) {
double tmp;
if (y <= -37.0) {
tmp = x + ((y * z) / t);
} else if (y <= 330000.0) {
tmp = x * (1.0 - (z / t));
} else {
tmp = x + (y * (z / t));
}
return tmp;
}
def code(x, y, z, t): tmp = 0 if y <= -37.0: tmp = x + ((y * z) / t) elif y <= 330000.0: tmp = x * (1.0 - (z / t)) else: tmp = x + (y * (z / t)) return tmp
function code(x, y, z, t) tmp = 0.0 if (y <= -37.0) tmp = Float64(x + Float64(Float64(y * z) / t)); elseif (y <= 330000.0) tmp = Float64(x * Float64(1.0 - Float64(z / t))); else tmp = Float64(x + Float64(y * Float64(z / t))); end return tmp end
function tmp_2 = code(x, y, z, t) tmp = 0.0; if (y <= -37.0) tmp = x + ((y * z) / t); elseif (y <= 330000.0) tmp = x * (1.0 - (z / t)); else tmp = x + (y * (z / t)); end tmp_2 = tmp; end
code[x_, y_, z_, t_] := If[LessEqual[y, -37.0], N[(x + N[(N[(y * z), $MachinePrecision] / t), $MachinePrecision]), $MachinePrecision], If[LessEqual[y, 330000.0], N[(x * N[(1.0 - N[(z / t), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], N[(x + N[(y * N[(z / t), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;y \leq -37:\\
\;\;\;\;x + \frac{y \cdot z}{t}\\
\mathbf{elif}\;y \leq 330000:\\
\;\;\;\;x \cdot \left(1 - \frac{z}{t}\right)\\
\mathbf{else}:\\
\;\;\;\;x + y \cdot \frac{z}{t}\\
\end{array}
\end{array}
if y < -37Initial program 96.4%
Taylor expanded in y around inf 89.6%
*-commutative89.6%
Simplified89.6%
if -37 < y < 3.3e5Initial program 94.0%
associate-/l*98.5%
Simplified98.5%
Taylor expanded in x around inf 88.4%
mul-1-neg88.4%
unsub-neg88.4%
Simplified88.4%
if 3.3e5 < y Initial program 86.5%
associate-/l*99.9%
Simplified99.9%
Taylor expanded in y around inf 83.7%
associate-*r/94.4%
Simplified94.4%
Final simplification90.3%
(FPCore (x y z t) :precision binary64 (if (or (<= z -4.5e-97) (not (<= z 5.1e+101))) (* x (/ (- z) t)) x))
double code(double x, double y, double z, double t) {
double tmp;
if ((z <= -4.5e-97) || !(z <= 5.1e+101)) {
tmp = x * (-z / t);
} else {
tmp = x;
}
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) :: tmp
if ((z <= (-4.5d-97)) .or. (.not. (z <= 5.1d+101))) then
tmp = x * (-z / t)
else
tmp = x
end if
code = tmp
end function
public static double code(double x, double y, double z, double t) {
double tmp;
if ((z <= -4.5e-97) || !(z <= 5.1e+101)) {
tmp = x * (-z / t);
} else {
tmp = x;
}
return tmp;
}
def code(x, y, z, t): tmp = 0 if (z <= -4.5e-97) or not (z <= 5.1e+101): tmp = x * (-z / t) else: tmp = x return tmp
function code(x, y, z, t) tmp = 0.0 if ((z <= -4.5e-97) || !(z <= 5.1e+101)) tmp = Float64(x * Float64(Float64(-z) / t)); else tmp = x; end return tmp end
function tmp_2 = code(x, y, z, t) tmp = 0.0; if ((z <= -4.5e-97) || ~((z <= 5.1e+101))) tmp = x * (-z / t); else tmp = x; end tmp_2 = tmp; end
code[x_, y_, z_, t_] := If[Or[LessEqual[z, -4.5e-97], N[Not[LessEqual[z, 5.1e+101]], $MachinePrecision]], N[(x * N[((-z) / t), $MachinePrecision]), $MachinePrecision], x]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;z \leq -4.5 \cdot 10^{-97} \lor \neg \left(z \leq 5.1 \cdot 10^{+101}\right):\\
\;\;\;\;x \cdot \frac{-z}{t}\\
\mathbf{else}:\\
\;\;\;\;x\\
\end{array}
\end{array}
if z < -4.5000000000000001e-97 or 5.09999999999999995e101 < z Initial program 86.9%
associate-/l*98.3%
Simplified98.3%
Taylor expanded in x around inf 60.3%
mul-1-neg60.3%
unsub-neg60.3%
Simplified60.3%
Taylor expanded in z around inf 48.2%
associate-*r/48.2%
neg-mul-148.2%
Simplified48.2%
if -4.5000000000000001e-97 < z < 5.09999999999999995e101Initial program 97.1%
associate-/l*98.8%
Simplified98.8%
Taylor expanded in z around 0 55.8%
Final simplification52.3%
(FPCore (x y z t) :precision binary64 (if (<= z -4.5e-97) (/ (* x z) (- t)) (if (<= z 5.1e+101) x (* x (/ (- z) t)))))
double code(double x, double y, double z, double t) {
double tmp;
if (z <= -4.5e-97) {
tmp = (x * z) / -t;
} else if (z <= 5.1e+101) {
tmp = x;
} else {
tmp = x * (-z / t);
}
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) :: tmp
if (z <= (-4.5d-97)) then
tmp = (x * z) / -t
else if (z <= 5.1d+101) then
tmp = x
else
tmp = x * (-z / t)
end if
code = tmp
end function
public static double code(double x, double y, double z, double t) {
double tmp;
if (z <= -4.5e-97) {
tmp = (x * z) / -t;
} else if (z <= 5.1e+101) {
tmp = x;
} else {
tmp = x * (-z / t);
}
return tmp;
}
def code(x, y, z, t): tmp = 0 if z <= -4.5e-97: tmp = (x * z) / -t elif z <= 5.1e+101: tmp = x else: tmp = x * (-z / t) return tmp
function code(x, y, z, t) tmp = 0.0 if (z <= -4.5e-97) tmp = Float64(Float64(x * z) / Float64(-t)); elseif (z <= 5.1e+101) tmp = x; else tmp = Float64(x * Float64(Float64(-z) / t)); end return tmp end
function tmp_2 = code(x, y, z, t) tmp = 0.0; if (z <= -4.5e-97) tmp = (x * z) / -t; elseif (z <= 5.1e+101) tmp = x; else tmp = x * (-z / t); end tmp_2 = tmp; end
code[x_, y_, z_, t_] := If[LessEqual[z, -4.5e-97], N[(N[(x * z), $MachinePrecision] / (-t)), $MachinePrecision], If[LessEqual[z, 5.1e+101], x, N[(x * N[((-z) / t), $MachinePrecision]), $MachinePrecision]]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;z \leq -4.5 \cdot 10^{-97}:\\
\;\;\;\;\frac{x \cdot z}{-t}\\
\mathbf{elif}\;z \leq 5.1 \cdot 10^{+101}:\\
\;\;\;\;x\\
\mathbf{else}:\\
\;\;\;\;x \cdot \frac{-z}{t}\\
\end{array}
\end{array}
if z < -4.5000000000000001e-97Initial program 90.0%
associate-/l*97.4%
Simplified97.4%
Taylor expanded in x around inf 59.9%
mul-1-neg59.9%
unsub-neg59.9%
Simplified59.9%
Taylor expanded in z around inf 46.7%
associate-*r/46.7%
neg-mul-146.7%
Simplified46.7%
distribute-frac-neg46.7%
distribute-rgt-neg-in46.7%
associate-/l*47.2%
distribute-neg-frac247.2%
Applied egg-rr47.2%
if -4.5000000000000001e-97 < z < 5.09999999999999995e101Initial program 97.1%
associate-/l*98.8%
Simplified98.8%
Taylor expanded in z around 0 55.8%
if 5.09999999999999995e101 < z Initial program 80.7%
associate-/l*99.9%
Simplified99.9%
Taylor expanded in x around inf 60.9%
mul-1-neg60.9%
unsub-neg60.9%
Simplified60.9%
Taylor expanded in z around inf 51.1%
associate-*r/51.1%
neg-mul-151.1%
Simplified51.1%
(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}
Initial program 92.4%
associate-/l*98.6%
Simplified98.6%
(FPCore (x y z t) :precision binary64 (* x (- 1.0 (/ z t))))
double code(double x, double y, double z, double t) {
return x * (1.0 - (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 * (1.0d0 - (z / t))
end function
public static double code(double x, double y, double z, double t) {
return x * (1.0 - (z / t));
}
def code(x, y, z, t): return x * (1.0 - (z / t))
function code(x, y, z, t) return Float64(x * Float64(1.0 - Float64(z / t))) end
function tmp = code(x, y, z, t) tmp = x * (1.0 - (z / t)); end
code[x_, y_, z_, t_] := N[(x * N[(1.0 - N[(z / t), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
x \cdot \left(1 - \frac{z}{t}\right)
\end{array}
Initial program 92.4%
associate-/l*98.6%
Simplified98.6%
Taylor expanded in x around inf 65.1%
mul-1-neg65.1%
unsub-neg65.1%
Simplified65.1%
(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 92.4%
associate-/l*98.6%
Simplified98.6%
Taylor expanded in z around 0 36.6%
(FPCore (x y z t)
:precision binary64
(if (< x -9.025511195533005e-135)
(- x (* (/ z t) (- x y)))
(if (< x 4.275032163700715e-250)
(+ x (* (/ (- y x) t) z))
(+ x (/ (- y x) (/ t z))))))
double code(double x, double y, double z, double t) {
double tmp;
if (x < -9.025511195533005e-135) {
tmp = x - ((z / t) * (x - y));
} else if (x < 4.275032163700715e-250) {
tmp = x + (((y - x) / t) * z);
} else {
tmp = x + ((y - x) / (t / z));
}
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) :: tmp
if (x < (-9.025511195533005d-135)) then
tmp = x - ((z / t) * (x - y))
else if (x < 4.275032163700715d-250) then
tmp = x + (((y - x) / t) * z)
else
tmp = x + ((y - x) / (t / z))
end if
code = tmp
end function
public static double code(double x, double y, double z, double t) {
double tmp;
if (x < -9.025511195533005e-135) {
tmp = x - ((z / t) * (x - y));
} else if (x < 4.275032163700715e-250) {
tmp = x + (((y - x) / t) * z);
} else {
tmp = x + ((y - x) / (t / z));
}
return tmp;
}
def code(x, y, z, t): tmp = 0 if x < -9.025511195533005e-135: tmp = x - ((z / t) * (x - y)) elif x < 4.275032163700715e-250: tmp = x + (((y - x) / t) * z) else: tmp = x + ((y - x) / (t / z)) return tmp
function code(x, y, z, t) tmp = 0.0 if (x < -9.025511195533005e-135) tmp = Float64(x - Float64(Float64(z / t) * Float64(x - y))); elseif (x < 4.275032163700715e-250) tmp = Float64(x + Float64(Float64(Float64(y - x) / t) * z)); else tmp = Float64(x + Float64(Float64(y - x) / Float64(t / z))); end return tmp end
function tmp_2 = code(x, y, z, t) tmp = 0.0; if (x < -9.025511195533005e-135) tmp = x - ((z / t) * (x - y)); elseif (x < 4.275032163700715e-250) tmp = x + (((y - x) / t) * z); else tmp = x + ((y - x) / (t / z)); end tmp_2 = tmp; end
code[x_, y_, z_, t_] := If[Less[x, -9.025511195533005e-135], N[(x - N[(N[(z / t), $MachinePrecision] * N[(x - y), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], If[Less[x, 4.275032163700715e-250], N[(x + N[(N[(N[(y - x), $MachinePrecision] / t), $MachinePrecision] * z), $MachinePrecision]), $MachinePrecision], N[(x + N[(N[(y - x), $MachinePrecision] / N[(t / z), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x < -9.025511195533005 \cdot 10^{-135}:\\
\;\;\;\;x - \frac{z}{t} \cdot \left(x - y\right)\\
\mathbf{elif}\;x < 4.275032163700715 \cdot 10^{-250}:\\
\;\;\;\;x + \frac{y - x}{t} \cdot z\\
\mathbf{else}:\\
\;\;\;\;x + \frac{y - x}{\frac{t}{z}}\\
\end{array}
\end{array}
herbie shell --seed 2024144
(FPCore (x y z t)
:name "Numeric.Histogram:binBounds from Chart-1.5.3"
:precision binary64
:alt
(! :herbie-platform default (if (< x -1805102239106601/200000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000) (- x (* (/ z t) (- x y))) (if (< x 855006432740143/2000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000) (+ x (* (/ (- y x) t) z)) (+ x (/ (- y x) (/ t z))))))
(+ x (/ (* (- y x) z) t)))