
(FPCore (x y z t a) :precision binary64 (- (+ x y) (/ (* (- z t) y) (- a t))))
double code(double x, double y, double z, double t, double a) {
return (x + y) - (((z - t) * y) / (a - t));
}
real(8) function code(x, y, z, t, a)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8), intent (in) :: t
real(8), intent (in) :: a
code = (x + y) - (((z - t) * y) / (a - t))
end function
public static double code(double x, double y, double z, double t, double a) {
return (x + y) - (((z - t) * y) / (a - t));
}
def code(x, y, z, t, a): return (x + y) - (((z - t) * y) / (a - t))
function code(x, y, z, t, a) return Float64(Float64(x + y) - Float64(Float64(Float64(z - t) * y) / Float64(a - t))) end
function tmp = code(x, y, z, t, a) tmp = (x + y) - (((z - t) * y) / (a - t)); end
code[x_, y_, z_, t_, a_] := N[(N[(x + y), $MachinePrecision] - N[(N[(N[(z - t), $MachinePrecision] * y), $MachinePrecision] / N[(a - t), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\left(x + y\right) - \frac{\left(z - t\right) \cdot y}{a - t}
\end{array}
Sampling outcomes in binary64 precision:
Herbie found 10 alternatives:
| Alternative | Accuracy | Speedup |
|---|
(FPCore (x y z t a) :precision binary64 (- (+ x y) (/ (* (- z t) y) (- a t))))
double code(double x, double y, double z, double t, double a) {
return (x + y) - (((z - t) * y) / (a - t));
}
real(8) function code(x, y, z, t, a)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8), intent (in) :: t
real(8), intent (in) :: a
code = (x + y) - (((z - t) * y) / (a - t))
end function
public static double code(double x, double y, double z, double t, double a) {
return (x + y) - (((z - t) * y) / (a - t));
}
def code(x, y, z, t, a): return (x + y) - (((z - t) * y) / (a - t))
function code(x, y, z, t, a) return Float64(Float64(x + y) - Float64(Float64(Float64(z - t) * y) / Float64(a - t))) end
function tmp = code(x, y, z, t, a) tmp = (x + y) - (((z - t) * y) / (a - t)); end
code[x_, y_, z_, t_, a_] := N[(N[(x + y), $MachinePrecision] - N[(N[(N[(z - t), $MachinePrecision] * y), $MachinePrecision] / N[(a - t), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\left(x + y\right) - \frac{\left(z - t\right) \cdot y}{a - t}
\end{array}
(FPCore (x y z t a)
:precision binary64
(if (<= t -6e+139)
(fma y (/ (- z a) t) x)
(if (<= t 3.8e+56)
(+ (+ x y) (/ (* y (- z t)) (- t a)))
(fma (/ y t) (- z a) x))))
double code(double x, double y, double z, double t, double a) {
double tmp;
if (t <= -6e+139) {
tmp = fma(y, ((z - a) / t), x);
} else if (t <= 3.8e+56) {
tmp = (x + y) + ((y * (z - t)) / (t - a));
} else {
tmp = fma((y / t), (z - a), x);
}
return tmp;
}
function code(x, y, z, t, a) tmp = 0.0 if (t <= -6e+139) tmp = fma(y, Float64(Float64(z - a) / t), x); elseif (t <= 3.8e+56) tmp = Float64(Float64(x + y) + Float64(Float64(y * Float64(z - t)) / Float64(t - a))); else tmp = fma(Float64(y / t), Float64(z - a), x); end return tmp end
code[x_, y_, z_, t_, a_] := If[LessEqual[t, -6e+139], N[(y * N[(N[(z - a), $MachinePrecision] / t), $MachinePrecision] + x), $MachinePrecision], If[LessEqual[t, 3.8e+56], N[(N[(x + y), $MachinePrecision] + N[(N[(y * N[(z - t), $MachinePrecision]), $MachinePrecision] / N[(t - a), $MachinePrecision]), $MachinePrecision]), $MachinePrecision], N[(N[(y / t), $MachinePrecision] * N[(z - a), $MachinePrecision] + x), $MachinePrecision]]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;t \leq -6 \cdot 10^{+139}:\\
\;\;\;\;\mathsf{fma}\left(y, \frac{z - a}{t}, x\right)\\
\mathbf{elif}\;t \leq 3.8 \cdot 10^{+56}:\\
\;\;\;\;\left(x + y\right) + \frac{y \cdot \left(z - t\right)}{t - a}\\
\mathbf{else}:\\
\;\;\;\;\mathsf{fma}\left(\frac{y}{t}, z - a, x\right)\\
\end{array}
\end{array}
if t < -5.9999999999999999e139Initial program 48.6%
Taylor expanded in t around inf
cancel-sign-sub-invN/A
metadata-evalN/A
*-lft-identityN/A
+-commutativeN/A
+-commutativeN/A
associate-+r+N/A
mul-1-negN/A
sub-negN/A
associate-/l*N/A
*-commutativeN/A
associate-/l*N/A
distribute-rgt-out--N/A
lower-fma.f64N/A
lower-/.f64N/A
lower--.f6489.8
Applied rewrites89.8%
Applied rewrites92.2%
if -5.9999999999999999e139 < t < 3.79999999999999996e56Initial program 91.9%
if 3.79999999999999996e56 < t Initial program 58.5%
Taylor expanded in t around inf
cancel-sign-sub-invN/A
metadata-evalN/A
*-lft-identityN/A
+-commutativeN/A
+-commutativeN/A
associate-+r+N/A
mul-1-negN/A
sub-negN/A
associate-/l*N/A
*-commutativeN/A
associate-/l*N/A
distribute-rgt-out--N/A
lower-fma.f64N/A
lower-/.f64N/A
lower--.f6484.8
Applied rewrites84.8%
Final simplification90.7%
(FPCore (x y z t a)
:precision binary64
(let* ((t_1 (+ (+ x y) (/ (* y (- z t)) (- t a)))))
(if (<= t_1 (- INFINITY))
(/ (* y z) t)
(if (<= t_1 -2e-221) (+ x y) (if (<= t_1 1e-277) x (+ x y))))))
double code(double x, double y, double z, double t, double a) {
double t_1 = (x + y) + ((y * (z - t)) / (t - a));
double tmp;
if (t_1 <= -((double) INFINITY)) {
tmp = (y * z) / t;
} else if (t_1 <= -2e-221) {
tmp = x + y;
} else if (t_1 <= 1e-277) {
tmp = x;
} else {
tmp = x + y;
}
return tmp;
}
public static double code(double x, double y, double z, double t, double a) {
double t_1 = (x + y) + ((y * (z - t)) / (t - a));
double tmp;
if (t_1 <= -Double.POSITIVE_INFINITY) {
tmp = (y * z) / t;
} else if (t_1 <= -2e-221) {
tmp = x + y;
} else if (t_1 <= 1e-277) {
tmp = x;
} else {
tmp = x + y;
}
return tmp;
}
def code(x, y, z, t, a): t_1 = (x + y) + ((y * (z - t)) / (t - a)) tmp = 0 if t_1 <= -math.inf: tmp = (y * z) / t elif t_1 <= -2e-221: tmp = x + y elif t_1 <= 1e-277: tmp = x else: tmp = x + y return tmp
function code(x, y, z, t, a) t_1 = Float64(Float64(x + y) + Float64(Float64(y * Float64(z - t)) / Float64(t - a))) tmp = 0.0 if (t_1 <= Float64(-Inf)) tmp = Float64(Float64(y * z) / t); elseif (t_1 <= -2e-221) tmp = Float64(x + y); elseif (t_1 <= 1e-277) tmp = x; else tmp = Float64(x + y); end return tmp end
function tmp_2 = code(x, y, z, t, a) t_1 = (x + y) + ((y * (z - t)) / (t - a)); tmp = 0.0; if (t_1 <= -Inf) tmp = (y * z) / t; elseif (t_1 <= -2e-221) tmp = x + y; elseif (t_1 <= 1e-277) tmp = x; else tmp = x + y; end tmp_2 = tmp; end
code[x_, y_, z_, t_, a_] := Block[{t$95$1 = N[(N[(x + y), $MachinePrecision] + N[(N[(y * N[(z - t), $MachinePrecision]), $MachinePrecision] / N[(t - a), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]}, If[LessEqual[t$95$1, (-Infinity)], N[(N[(y * z), $MachinePrecision] / t), $MachinePrecision], If[LessEqual[t$95$1, -2e-221], N[(x + y), $MachinePrecision], If[LessEqual[t$95$1, 1e-277], x, N[(x + y), $MachinePrecision]]]]]
\begin{array}{l}
\\
\begin{array}{l}
t_1 := \left(x + y\right) + \frac{y \cdot \left(z - t\right)}{t - a}\\
\mathbf{if}\;t\_1 \leq -\infty:\\
\;\;\;\;\frac{y \cdot z}{t}\\
\mathbf{elif}\;t\_1 \leq -2 \cdot 10^{-221}:\\
\;\;\;\;x + y\\
\mathbf{elif}\;t\_1 \leq 10^{-277}:\\
\;\;\;\;x\\
\mathbf{else}:\\
\;\;\;\;x + y\\
\end{array}
\end{array}
if (-.f64 (+.f64 x y) (/.f64 (*.f64 (-.f64 z t) y) (-.f64 a t))) < -inf.0Initial program 38.7%
Taylor expanded in t around inf
cancel-sign-sub-invN/A
metadata-evalN/A
*-lft-identityN/A
+-commutativeN/A
+-commutativeN/A
associate-+r+N/A
mul-1-negN/A
sub-negN/A
associate-/l*N/A
*-commutativeN/A
associate-/l*N/A
distribute-rgt-out--N/A
lower-fma.f64N/A
lower-/.f64N/A
lower--.f6470.1
Applied rewrites70.1%
Taylor expanded in z around inf
Applied rewrites33.9%
if -inf.0 < (-.f64 (+.f64 x y) (/.f64 (*.f64 (-.f64 z t) y) (-.f64 a t))) < -2.00000000000000003e-221 or 9.99999999999999969e-278 < (-.f64 (+.f64 x y) (/.f64 (*.f64 (-.f64 z t) y) (-.f64 a t))) Initial program 89.4%
Taylor expanded in a around inf
+-commutativeN/A
lower-+.f6471.2
Applied rewrites71.2%
if -2.00000000000000003e-221 < (-.f64 (+.f64 x y) (/.f64 (*.f64 (-.f64 z t) y) (-.f64 a t))) < 9.99999999999999969e-278Initial program 11.5%
Taylor expanded in a around 0
cancel-sign-sub-invN/A
metadata-evalN/A
*-lft-identityN/A
+-commutativeN/A
associate-/l*N/A
lower-fma.f64N/A
lower-/.f64N/A
lower--.f64N/A
+-commutativeN/A
lower-+.f648.1
Applied rewrites8.1%
Taylor expanded in z around 0
Applied rewrites44.1%
Final simplification64.8%
(FPCore (x y z t a)
:precision binary64
(let* ((t_1 (- (+ y x) (* (* (- z t) (/ 1.0 (- a t))) y)))
(t_2 (- (+ x y) (/ (* (- z t) y) (- a t)))))
(if (< t_2 -1.3664970889390727e-7)
t_1
(if (< t_2 1.4754293444577233e-239)
(/ (- (* y (- a z)) (* x t)) (- a t))
t_1))))
double code(double x, double y, double z, double t, double a) {
double t_1 = (y + x) - (((z - t) * (1.0 / (a - t))) * y);
double t_2 = (x + y) - (((z - t) * y) / (a - t));
double tmp;
if (t_2 < -1.3664970889390727e-7) {
tmp = t_1;
} else if (t_2 < 1.4754293444577233e-239) {
tmp = ((y * (a - z)) - (x * t)) / (a - t);
} else {
tmp = t_1;
}
return tmp;
}
real(8) function code(x, y, z, t, a)
real(8), intent (in) :: x
real(8), intent (in) :: y
real(8), intent (in) :: z
real(8), intent (in) :: t
real(8), intent (in) :: a
real(8) :: t_1
real(8) :: t_2
real(8) :: tmp
t_1 = (y + x) - (((z - t) * (1.0d0 / (a - t))) * y)
t_2 = (x + y) - (((z - t) * y) / (a - t))
if (t_2 < (-1.3664970889390727d-7)) then
tmp = t_1
else if (t_2 < 1.4754293444577233d-239) then
tmp = ((y * (a - z)) - (x * t)) / (a - t)
else
tmp = t_1
end if
code = tmp
end function
public static double code(double x, double y, double z, double t, double a) {
double t_1 = (y + x) - (((z - t) * (1.0 / (a - t))) * y);
double t_2 = (x + y) - (((z - t) * y) / (a - t));
double tmp;
if (t_2 < -1.3664970889390727e-7) {
tmp = t_1;
} else if (t_2 < 1.4754293444577233e-239) {
tmp = ((y * (a - z)) - (x * t)) / (a - t);
} else {
tmp = t_1;
}
return tmp;
}
def code(x, y, z, t, a): t_1 = (y + x) - (((z - t) * (1.0 / (a - t))) * y) t_2 = (x + y) - (((z - t) * y) / (a - t)) tmp = 0 if t_2 < -1.3664970889390727e-7: tmp = t_1 elif t_2 < 1.4754293444577233e-239: tmp = ((y * (a - z)) - (x * t)) / (a - t) else: tmp = t_1 return tmp
function code(x, y, z, t, a) t_1 = Float64(Float64(y + x) - Float64(Float64(Float64(z - t) * Float64(1.0 / Float64(a - t))) * y)) t_2 = Float64(Float64(x + y) - Float64(Float64(Float64(z - t) * y) / Float64(a - t))) tmp = 0.0 if (t_2 < -1.3664970889390727e-7) tmp = t_1; elseif (t_2 < 1.4754293444577233e-239) tmp = Float64(Float64(Float64(y * Float64(a - z)) - Float64(x * t)) / Float64(a - t)); else tmp = t_1; end return tmp end
function tmp_2 = code(x, y, z, t, a) t_1 = (y + x) - (((z - t) * (1.0 / (a - t))) * y); t_2 = (x + y) - (((z - t) * y) / (a - t)); tmp = 0.0; if (t_2 < -1.3664970889390727e-7) tmp = t_1; elseif (t_2 < 1.4754293444577233e-239) tmp = ((y * (a - z)) - (x * t)) / (a - t); else tmp = t_1; end tmp_2 = tmp; end
code[x_, y_, z_, t_, a_] := Block[{t$95$1 = N[(N[(y + x), $MachinePrecision] - N[(N[(N[(z - t), $MachinePrecision] * N[(1.0 / N[(a - t), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] * y), $MachinePrecision]), $MachinePrecision]}, Block[{t$95$2 = N[(N[(x + y), $MachinePrecision] - N[(N[(N[(z - t), $MachinePrecision] * y), $MachinePrecision] / N[(a - t), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]}, If[Less[t$95$2, -1.3664970889390727e-7], t$95$1, If[Less[t$95$2, 1.4754293444577233e-239], N[(N[(N[(y * N[(a - z), $MachinePrecision]), $MachinePrecision] - N[(x * t), $MachinePrecision]), $MachinePrecision] / N[(a - t), $MachinePrecision]), $MachinePrecision], t$95$1]]]]
\begin{array}{l}
\\
\begin{array}{l}
t_1 := \left(y + x\right) - \left(\left(z - t\right) \cdot \frac{1}{a - t}\right) \cdot y\\
t_2 := \left(x + y\right) - \frac{\left(z - t\right) \cdot y}{a - t}\\
\mathbf{if}\;t\_2 < -1.3664970889390727 \cdot 10^{-7}:\\
\;\;\;\;t\_1\\
\mathbf{elif}\;t\_2 < 1.4754293444577233 \cdot 10^{-239}:\\
\;\;\;\;\frac{y \cdot \left(a - z\right) - x \cdot t}{a - t}\\
\mathbf{else}:\\
\;\;\;\;t\_1\\
\end{array}
\end{array}
herbie shell --seed 2024230
(FPCore (x y z t a)
:name "Graphics.Rendering.Plot.Render.Plot.Axis:renderAxisTick from plot-0.2.3.4, B"
:precision binary64
:alt
(! :herbie-platform default (if (< (- (+ x y) (/ (* (- z t) y) (- a t))) -13664970889390727/100000000000000000000000) (- (+ y x) (* (* (- z t) (/ 1 (- a t))) y)) (if (< (- (+ x y) (/ (* (- z t) y) (- a t))) 14754293444577233/1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000) (/ (- (* y (- a z)) (* x t)) (- a t)) (- (+ y x) (* (* (- z t) (/ 1 (- a t))) y)))))
(- (+ x y) (/ (* (- z t) y) (- a t))))