
(FPCore (x y z) :precision binary64 (+ x (* y (+ z x))))
double code(double x, double y, double z) {
return x + (y * (z + 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 + (y * (z + x))
end function
public static double code(double x, double y, double z) {
return x + (y * (z + x));
}
def code(x, y, z): return x + (y * (z + x))
function code(x, y, z) return Float64(x + Float64(y * Float64(z + x))) end
function tmp = code(x, y, z) tmp = x + (y * (z + x)); end
code[x_, y_, z_] := N[(x + N[(y * N[(z + x), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
x + y \cdot \left(z + x\right)
\end{array}
Sampling outcomes in binary64 precision:
Herbie found 8 alternatives:
| Alternative | Accuracy | Speedup |
|---|
(FPCore (x y z) :precision binary64 (+ x (* y (+ z x))))
double code(double x, double y, double z) {
return x + (y * (z + 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 + (y * (z + x))
end function
public static double code(double x, double y, double z) {
return x + (y * (z + x));
}
def code(x, y, z): return x + (y * (z + x))
function code(x, y, z) return Float64(x + Float64(y * Float64(z + x))) end
function tmp = code(x, y, z) tmp = x + (y * (z + x)); end
code[x_, y_, z_] := N[(x + N[(y * N[(z + x), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
x + y \cdot \left(z + x\right)
\end{array}
(FPCore (x y z) :precision binary64 (fma y (+ x z) x))
double code(double x, double y, double z) {
return fma(y, (x + z), x);
}
function code(x, y, z) return fma(y, Float64(x + z), x) end
code[x_, y_, z_] := N[(y * N[(x + z), $MachinePrecision] + x), $MachinePrecision]
\begin{array}{l}
\\
\mathsf{fma}\left(y, x + z, x\right)
\end{array}
(FPCore (x y z)
:precision binary64
(if (<= y -2.1e+195)
(* y z)
(if (<= y -3.1e+122)
(* y x)
(if (<= y -2.6e-80)
(* y z)
(if (<= y 4e-22) x (if (<= y 2.85e+212) (* y z) (* y x)))))))
double code(double x, double y, double z) {
double tmp;
if (y <= -2.1e+195) {
tmp = y * z;
} else if (y <= -3.1e+122) {
tmp = y * x;
} else if (y <= -2.6e-80) {
tmp = y * z;
} else if (y <= 4e-22) {
tmp = x;
} else if (y <= 2.85e+212) {
tmp = y * z;
} else {
tmp = 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 (y <= (-2.1d+195)) then
tmp = y * z
else if (y <= (-3.1d+122)) then
tmp = y * x
else if (y <= (-2.6d-80)) then
tmp = y * z
else if (y <= 4d-22) then
tmp = x
else if (y <= 2.85d+212) then
tmp = y * z
else
tmp = y * x
end if
code = tmp
end function
public static double code(double x, double y, double z) {
double tmp;
if (y <= -2.1e+195) {
tmp = y * z;
} else if (y <= -3.1e+122) {
tmp = y * x;
} else if (y <= -2.6e-80) {
tmp = y * z;
} else if (y <= 4e-22) {
tmp = x;
} else if (y <= 2.85e+212) {
tmp = y * z;
} else {
tmp = y * x;
}
return tmp;
}
def code(x, y, z): tmp = 0 if y <= -2.1e+195: tmp = y * z elif y <= -3.1e+122: tmp = y * x elif y <= -2.6e-80: tmp = y * z elif y <= 4e-22: tmp = x elif y <= 2.85e+212: tmp = y * z else: tmp = y * x return tmp
function code(x, y, z) tmp = 0.0 if (y <= -2.1e+195) tmp = Float64(y * z); elseif (y <= -3.1e+122) tmp = Float64(y * x); elseif (y <= -2.6e-80) tmp = Float64(y * z); elseif (y <= 4e-22) tmp = x; elseif (y <= 2.85e+212) tmp = Float64(y * z); else tmp = Float64(y * x); end return tmp end
function tmp_2 = code(x, y, z) tmp = 0.0; if (y <= -2.1e+195) tmp = y * z; elseif (y <= -3.1e+122) tmp = y * x; elseif (y <= -2.6e-80) tmp = y * z; elseif (y <= 4e-22) tmp = x; elseif (y <= 2.85e+212) tmp = y * z; else tmp = y * x; end tmp_2 = tmp; end
code[x_, y_, z_] := If[LessEqual[y, -2.1e+195], N[(y * z), $MachinePrecision], If[LessEqual[y, -3.1e+122], N[(y * x), $MachinePrecision], If[LessEqual[y, -2.6e-80], N[(y * z), $MachinePrecision], If[LessEqual[y, 4e-22], x, If[LessEqual[y, 2.85e+212], N[(y * z), $MachinePrecision], N[(y * x), $MachinePrecision]]]]]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;y \leq -2.1 \cdot 10^{+195}:\\
\;\;\;\;y \cdot z\\
\mathbf{elif}\;y \leq -3.1 \cdot 10^{+122}:\\
\;\;\;\;y \cdot x\\
\mathbf{elif}\;y \leq -2.6 \cdot 10^{-80}:\\
\;\;\;\;y \cdot z\\
\mathbf{elif}\;y \leq 4 \cdot 10^{-22}:\\
\;\;\;\;x\\
\mathbf{elif}\;y \leq 2.85 \cdot 10^{+212}:\\
\;\;\;\;y \cdot z\\
\mathbf{else}:\\
\;\;\;\;y \cdot x\\
\end{array}
\end{array}
(FPCore (x y z) :precision binary64 (if (or (<= z -1.15e+53) (not (<= z 8e+81))) (* y z) (* x (+ y 1.0))))
double code(double x, double y, double z) {
double tmp;
if ((z <= -1.15e+53) || !(z <= 8e+81)) {
tmp = y * z;
} else {
tmp = x * (y + 1.0);
}
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 <= (-1.15d+53)) .or. (.not. (z <= 8d+81))) then
tmp = y * z
else
tmp = x * (y + 1.0d0)
end if
code = tmp
end function
public static double code(double x, double y, double z) {
double tmp;
if ((z <= -1.15e+53) || !(z <= 8e+81)) {
tmp = y * z;
} else {
tmp = x * (y + 1.0);
}
return tmp;
}
def code(x, y, z): tmp = 0 if (z <= -1.15e+53) or not (z <= 8e+81): tmp = y * z else: tmp = x * (y + 1.0) return tmp
function code(x, y, z) tmp = 0.0 if ((z <= -1.15e+53) || !(z <= 8e+81)) tmp = Float64(y * z); else tmp = Float64(x * Float64(y + 1.0)); end return tmp end
function tmp_2 = code(x, y, z) tmp = 0.0; if ((z <= -1.15e+53) || ~((z <= 8e+81))) tmp = y * z; else tmp = x * (y + 1.0); end tmp_2 = tmp; end
code[x_, y_, z_] := If[Or[LessEqual[z, -1.15e+53], N[Not[LessEqual[z, 8e+81]], $MachinePrecision]], N[(y * z), $MachinePrecision], N[(x * N[(y + 1.0), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;z \leq -1.15 \cdot 10^{+53} \lor \neg \left(z \leq 8 \cdot 10^{+81}\right):\\
\;\;\;\;y \cdot z\\
\mathbf{else}:\\
\;\;\;\;x \cdot \left(y + 1\right)\\
\end{array}
\end{array}
(FPCore (x y z) :precision binary64 (if (or (<= y -1.65e-37) (not (<= y 4.7e-33))) (* y (+ x z)) (* x (+ y 1.0))))
double code(double x, double y, double z) {
double tmp;
if ((y <= -1.65e-37) || !(y <= 4.7e-33)) {
tmp = y * (x + z);
} else {
tmp = x * (y + 1.0);
}
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 <= (-1.65d-37)) .or. (.not. (y <= 4.7d-33))) then
tmp = y * (x + z)
else
tmp = x * (y + 1.0d0)
end if
code = tmp
end function
public static double code(double x, double y, double z) {
double tmp;
if ((y <= -1.65e-37) || !(y <= 4.7e-33)) {
tmp = y * (x + z);
} else {
tmp = x * (y + 1.0);
}
return tmp;
}
def code(x, y, z): tmp = 0 if (y <= -1.65e-37) or not (y <= 4.7e-33): tmp = y * (x + z) else: tmp = x * (y + 1.0) return tmp
function code(x, y, z) tmp = 0.0 if ((y <= -1.65e-37) || !(y <= 4.7e-33)) tmp = Float64(y * Float64(x + z)); else tmp = Float64(x * Float64(y + 1.0)); end return tmp end
function tmp_2 = code(x, y, z) tmp = 0.0; if ((y <= -1.65e-37) || ~((y <= 4.7e-33))) tmp = y * (x + z); else tmp = x * (y + 1.0); end tmp_2 = tmp; end
code[x_, y_, z_] := If[Or[LessEqual[y, -1.65e-37], N[Not[LessEqual[y, 4.7e-33]], $MachinePrecision]], N[(y * N[(x + z), $MachinePrecision]), $MachinePrecision], N[(x * N[(y + 1.0), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;y \leq -1.65 \cdot 10^{-37} \lor \neg \left(y \leq 4.7 \cdot 10^{-33}\right):\\
\;\;\;\;y \cdot \left(x + z\right)\\
\mathbf{else}:\\
\;\;\;\;x \cdot \left(y + 1\right)\\
\end{array}
\end{array}
(FPCore (x y z) :precision binary64 (if (or (<= y -1.0) (not (<= y 2.2e-7))) (* y (+ x z)) (+ x (* y z))))
double code(double x, double y, double z) {
double tmp;
if ((y <= -1.0) || !(y <= 2.2e-7)) {
tmp = y * (x + z);
} else {
tmp = x + (y * z);
}
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 <= (-1.0d0)) .or. (.not. (y <= 2.2d-7))) then
tmp = y * (x + z)
else
tmp = x + (y * z)
end if
code = tmp
end function
public static double code(double x, double y, double z) {
double tmp;
if ((y <= -1.0) || !(y <= 2.2e-7)) {
tmp = y * (x + z);
} else {
tmp = x + (y * z);
}
return tmp;
}
def code(x, y, z): tmp = 0 if (y <= -1.0) or not (y <= 2.2e-7): tmp = y * (x + z) else: tmp = x + (y * z) return tmp
function code(x, y, z) tmp = 0.0 if ((y <= -1.0) || !(y <= 2.2e-7)) tmp = Float64(y * Float64(x + z)); else tmp = Float64(x + Float64(y * z)); end return tmp end
function tmp_2 = code(x, y, z) tmp = 0.0; if ((y <= -1.0) || ~((y <= 2.2e-7))) tmp = y * (x + z); else tmp = x + (y * z); end tmp_2 = tmp; end
code[x_, y_, z_] := If[Or[LessEqual[y, -1.0], N[Not[LessEqual[y, 2.2e-7]], $MachinePrecision]], N[(y * N[(x + z), $MachinePrecision]), $MachinePrecision], N[(x + N[(y * z), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;y \leq -1 \lor \neg \left(y \leq 2.2 \cdot 10^{-7}\right):\\
\;\;\;\;y \cdot \left(x + z\right)\\
\mathbf{else}:\\
\;\;\;\;x + y \cdot z\\
\end{array}
\end{array}
(FPCore (x y z) :precision binary64 (if (or (<= y -1.0) (not (<= y 150.0))) (* y x) x))
double code(double x, double y, double z) {
double tmp;
if ((y <= -1.0) || !(y <= 150.0)) {
tmp = 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 <= (-1.0d0)) .or. (.not. (y <= 150.0d0))) then
tmp = 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 <= -1.0) || !(y <= 150.0)) {
tmp = y * x;
} else {
tmp = x;
}
return tmp;
}
def code(x, y, z): tmp = 0 if (y <= -1.0) or not (y <= 150.0): tmp = y * x else: tmp = x return tmp
function code(x, y, z) tmp = 0.0 if ((y <= -1.0) || !(y <= 150.0)) tmp = Float64(y * x); else tmp = x; end return tmp end
function tmp_2 = code(x, y, z) tmp = 0.0; if ((y <= -1.0) || ~((y <= 150.0))) tmp = y * x; else tmp = x; end tmp_2 = tmp; end
code[x_, y_, z_] := If[Or[LessEqual[y, -1.0], N[Not[LessEqual[y, 150.0]], $MachinePrecision]], N[(y * x), $MachinePrecision], x]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;y \leq -1 \lor \neg \left(y \leq 150\right):\\
\;\;\;\;y \cdot x\\
\mathbf{else}:\\
\;\;\;\;x\\
\end{array}
\end{array}
(FPCore (x y z) :precision binary64 (+ x (* y (+ x z))))
double code(double x, double y, double z) {
return x + (y * (x + z));
}
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 * (x + z))
end function
public static double code(double x, double y, double z) {
return x + (y * (x + z));
}
def code(x, y, z): return x + (y * (x + z))
function code(x, y, z) return Float64(x + Float64(y * Float64(x + z))) end
function tmp = code(x, y, z) tmp = x + (y * (x + z)); end
code[x_, y_, z_] := N[(x + N[(y * N[(x + z), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
x + y \cdot \left(x + z\right)
\end{array}
(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}
herbie shell --seed 2024008
(FPCore (x y z)
:name "Main:bigenough2 from A"
:precision binary64
(+ x (* y (+ z x))))