
(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 -1.6e-7)
(* y z)
(if (<= y 105.0)
x
(if (or (<= y 4.2e+94) (and (not (<= y 6.2e+140)) (<= y 5e+230)))
(* y z)
(* y x)))))
double code(double x, double y, double z) {
double tmp;
if (y <= -1.6e-7) {
tmp = y * z;
} else if (y <= 105.0) {
tmp = x;
} else if ((y <= 4.2e+94) || (!(y <= 6.2e+140) && (y <= 5e+230))) {
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 <= (-1.6d-7)) then
tmp = y * z
else if (y <= 105.0d0) then
tmp = x
else if ((y <= 4.2d+94) .or. (.not. (y <= 6.2d+140)) .and. (y <= 5d+230)) 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 <= -1.6e-7) {
tmp = y * z;
} else if (y <= 105.0) {
tmp = x;
} else if ((y <= 4.2e+94) || (!(y <= 6.2e+140) && (y <= 5e+230))) {
tmp = y * z;
} else {
tmp = y * x;
}
return tmp;
}
def code(x, y, z): tmp = 0 if y <= -1.6e-7: tmp = y * z elif y <= 105.0: tmp = x elif (y <= 4.2e+94) or (not (y <= 6.2e+140) and (y <= 5e+230)): tmp = y * z else: tmp = y * x return tmp
function code(x, y, z) tmp = 0.0 if (y <= -1.6e-7) tmp = Float64(y * z); elseif (y <= 105.0) tmp = x; elseif ((y <= 4.2e+94) || (!(y <= 6.2e+140) && (y <= 5e+230))) 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 <= -1.6e-7) tmp = y * z; elseif (y <= 105.0) tmp = x; elseif ((y <= 4.2e+94) || (~((y <= 6.2e+140)) && (y <= 5e+230))) tmp = y * z; else tmp = y * x; end tmp_2 = tmp; end
code[x_, y_, z_] := If[LessEqual[y, -1.6e-7], N[(y * z), $MachinePrecision], If[LessEqual[y, 105.0], x, If[Or[LessEqual[y, 4.2e+94], And[N[Not[LessEqual[y, 6.2e+140]], $MachinePrecision], LessEqual[y, 5e+230]]], N[(y * z), $MachinePrecision], N[(y * x), $MachinePrecision]]]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;y \leq -1.6 \cdot 10^{-7}:\\
\;\;\;\;y \cdot z\\
\mathbf{elif}\;y \leq 105:\\
\;\;\;\;x\\
\mathbf{elif}\;y \leq 4.2 \cdot 10^{+94} \lor \neg \left(y \leq 6.2 \cdot 10^{+140}\right) \land y \leq 5 \cdot 10^{+230}:\\
\;\;\;\;y \cdot z\\
\mathbf{else}:\\
\;\;\;\;y \cdot x\\
\end{array}
\end{array}
(FPCore (x y z) :precision binary64 (if (or (<= x -8.8e-22) (not (<= x 6.5e-70))) (* x (+ y 1.0)) (* y z)))
double code(double x, double y, double z) {
double tmp;
if ((x <= -8.8e-22) || !(x <= 6.5e-70)) {
tmp = x * (y + 1.0);
} else {
tmp = 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 ((x <= (-8.8d-22)) .or. (.not. (x <= 6.5d-70))) then
tmp = x * (y + 1.0d0)
else
tmp = y * z
end if
code = tmp
end function
public static double code(double x, double y, double z) {
double tmp;
if ((x <= -8.8e-22) || !(x <= 6.5e-70)) {
tmp = x * (y + 1.0);
} else {
tmp = y * z;
}
return tmp;
}
def code(x, y, z): tmp = 0 if (x <= -8.8e-22) or not (x <= 6.5e-70): tmp = x * (y + 1.0) else: tmp = y * z return tmp
function code(x, y, z) tmp = 0.0 if ((x <= -8.8e-22) || !(x <= 6.5e-70)) tmp = Float64(x * Float64(y + 1.0)); else tmp = Float64(y * z); end return tmp end
function tmp_2 = code(x, y, z) tmp = 0.0; if ((x <= -8.8e-22) || ~((x <= 6.5e-70))) tmp = x * (y + 1.0); else tmp = y * z; end tmp_2 = tmp; end
code[x_, y_, z_] := If[Or[LessEqual[x, -8.8e-22], N[Not[LessEqual[x, 6.5e-70]], $MachinePrecision]], N[(x * N[(y + 1.0), $MachinePrecision]), $MachinePrecision], N[(y * z), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -8.8 \cdot 10^{-22} \lor \neg \left(x \leq 6.5 \cdot 10^{-70}\right):\\
\;\;\;\;x \cdot \left(y + 1\right)\\
\mathbf{else}:\\
\;\;\;\;y \cdot z\\
\end{array}
\end{array}
(FPCore (x y z) :precision binary64 (if (or (<= x -9.5e+70) (not (<= x 6.2e-70))) (* x (+ y 1.0)) (* y (+ x z))))
double code(double x, double y, double z) {
double tmp;
if ((x <= -9.5e+70) || !(x <= 6.2e-70)) {
tmp = x * (y + 1.0);
} else {
tmp = y * (x + 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 ((x <= (-9.5d+70)) .or. (.not. (x <= 6.2d-70))) then
tmp = x * (y + 1.0d0)
else
tmp = y * (x + z)
end if
code = tmp
end function
public static double code(double x, double y, double z) {
double tmp;
if ((x <= -9.5e+70) || !(x <= 6.2e-70)) {
tmp = x * (y + 1.0);
} else {
tmp = y * (x + z);
}
return tmp;
}
def code(x, y, z): tmp = 0 if (x <= -9.5e+70) or not (x <= 6.2e-70): tmp = x * (y + 1.0) else: tmp = y * (x + z) return tmp
function code(x, y, z) tmp = 0.0 if ((x <= -9.5e+70) || !(x <= 6.2e-70)) tmp = Float64(x * Float64(y + 1.0)); else tmp = Float64(y * Float64(x + z)); end return tmp end
function tmp_2 = code(x, y, z) tmp = 0.0; if ((x <= -9.5e+70) || ~((x <= 6.2e-70))) tmp = x * (y + 1.0); else tmp = y * (x + z); end tmp_2 = tmp; end
code[x_, y_, z_] := If[Or[LessEqual[x, -9.5e+70], N[Not[LessEqual[x, 6.2e-70]], $MachinePrecision]], N[(x * N[(y + 1.0), $MachinePrecision]), $MachinePrecision], N[(y * N[(x + z), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -9.5 \cdot 10^{+70} \lor \neg \left(x \leq 6.2 \cdot 10^{-70}\right):\\
\;\;\;\;x \cdot \left(y + 1\right)\\
\mathbf{else}:\\
\;\;\;\;y \cdot \left(x + z\right)\\
\end{array}
\end{array}
(FPCore (x y z) :precision binary64 (if (or (<= y -1.0) (not (<= y 1.0))) (* y (+ x z)) (+ x (* y z))))
double code(double x, double y, double z) {
double tmp;
if ((y <= -1.0) || !(y <= 1.0)) {
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 <= 1.0d0))) 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 <= 1.0)) {
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 <= 1.0): tmp = y * (x + z) else: tmp = x + (y * z) return tmp
function code(x, y, z) tmp = 0.0 if ((y <= -1.0) || !(y <= 1.0)) 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 <= 1.0))) 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, 1.0]], $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 1\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 1.0))) (* y x) x))
double code(double x, double y, double z) {
double tmp;
if ((y <= -1.0) || !(y <= 1.0)) {
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 <= 1.0d0))) 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 <= 1.0)) {
tmp = y * x;
} else {
tmp = x;
}
return tmp;
}
def code(x, y, z): tmp = 0 if (y <= -1.0) or not (y <= 1.0): tmp = y * x else: tmp = x return tmp
function code(x, y, z) tmp = 0.0 if ((y <= -1.0) || !(y <= 1.0)) 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 <= 1.0))) 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, 1.0]], $MachinePrecision]], N[(y * x), $MachinePrecision], x]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;y \leq -1 \lor \neg \left(y \leq 1\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 2023343
(FPCore (x y z)
:name "Main:bigenough2 from A"
:precision binary64
(+ x (* y (+ z x))))