
(FPCore (x) :precision binary64 (sqrt (* 2.0 (pow x 2.0))))
double code(double x) {
return sqrt((2.0 * pow(x, 2.0)));
}
real(8) function code(x)
real(8), intent (in) :: x
code = sqrt((2.0d0 * (x ** 2.0d0)))
end function
public static double code(double x) {
return Math.sqrt((2.0 * Math.pow(x, 2.0)));
}
def code(x): return math.sqrt((2.0 * math.pow(x, 2.0)))
function code(x) return sqrt(Float64(2.0 * (x ^ 2.0))) end
function tmp = code(x) tmp = sqrt((2.0 * (x ^ 2.0))); end
code[x_] := N[Sqrt[N[(2.0 * N[Power[x, 2.0], $MachinePrecision]), $MachinePrecision]], $MachinePrecision]
\begin{array}{l}
\\
\sqrt{2 \cdot {x}^{2}}
\end{array}
Sampling outcomes in binary64 precision:
Herbie found 6 alternatives:
| Alternative | Accuracy | Speedup |
|---|
(FPCore (x) :precision binary64 (sqrt (* 2.0 (pow x 2.0))))
double code(double x) {
return sqrt((2.0 * pow(x, 2.0)));
}
real(8) function code(x)
real(8), intent (in) :: x
code = sqrt((2.0d0 * (x ** 2.0d0)))
end function
public static double code(double x) {
return Math.sqrt((2.0 * Math.pow(x, 2.0)));
}
def code(x): return math.sqrt((2.0 * math.pow(x, 2.0)))
function code(x) return sqrt(Float64(2.0 * (x ^ 2.0))) end
function tmp = code(x) tmp = sqrt((2.0 * (x ^ 2.0))); end
code[x_] := N[Sqrt[N[(2.0 * N[Power[x, 2.0], $MachinePrecision]), $MachinePrecision]], $MachinePrecision]
\begin{array}{l}
\\
\sqrt{2 \cdot {x}^{2}}
\end{array}
(FPCore (x) :precision binary64 (hypot x x))
double code(double x) {
return hypot(x, x);
}
public static double code(double x) {
return Math.hypot(x, x);
}
def code(x): return math.hypot(x, x)
function code(x) return hypot(x, x) end
function tmp = code(x) tmp = hypot(x, x); end
code[x_] := N[Sqrt[x ^ 2 + x ^ 2], $MachinePrecision]
\begin{array}{l}
\\
\mathsf{hypot}\left(x, x\right)
\end{array}
Initial program 50.3%
Taylor expanded in x around 0 55.0%
rem-square-sqrt53.7%
fabs-sqr53.7%
rem-square-sqrt99.4%
rem-sqrt-square50.2%
swap-sqr49.9%
unpow249.9%
rem-square-sqrt50.3%
*-commutative50.3%
count-250.3%
unpow250.3%
unpow250.3%
hypot-define100.0%
Simplified100.0%
(FPCore (x) :precision binary64 (+ x x))
double code(double x) {
return x + x;
}
real(8) function code(x)
real(8), intent (in) :: x
code = x + x
end function
public static double code(double x) {
return x + x;
}
def code(x): return x + x
function code(x) return Float64(x + x) end
function tmp = code(x) tmp = x + x; end
code[x_] := N[(x + x), $MachinePrecision]
\begin{array}{l}
\\
x + x
\end{array}
Initial program 50.3%
sqrt-prod50.1%
sqrt-pow155.0%
metadata-eval55.0%
pow155.0%
Applied egg-rr55.0%
Taylor expanded in x around 0 55.0%
Simplified10.6%
add-sqr-sqrt9.3%
sqrt-unprod13.6%
swap-sqr13.6%
metadata-eval13.6%
metadata-eval13.6%
swap-sqr13.6%
*-commutative13.6%
*-commutative13.6%
sqrt-unprod11.4%
add-log-exp3.6%
add-sqr-sqrt4.9%
*-commutative4.9%
exp-lft-sqr4.9%
log-prod4.9%
add-log-exp8.7%
add-log-exp12.4%
Applied egg-rr12.4%
(FPCore (x) :precision binary64 8.0)
double code(double x) {
return 8.0;
}
real(8) function code(x)
real(8), intent (in) :: x
code = 8.0d0
end function
public static double code(double x) {
return 8.0;
}
def code(x): return 8.0
function code(x) return 8.0 end
function tmp = code(x) tmp = 8.0; end
code[x_] := 8.0
\begin{array}{l}
\\
8
\end{array}
Initial program 50.3%
sqrt-prod50.1%
sqrt-pow155.0%
metadata-eval55.0%
pow155.0%
Applied egg-rr55.0%
Taylor expanded in x around 0 55.0%
Simplified10.6%
add-sqr-sqrt9.3%
sqrt-unprod13.6%
swap-sqr13.6%
metadata-eval13.6%
metadata-eval13.6%
swap-sqr13.6%
*-commutative13.6%
*-commutative13.6%
sqrt-unprod11.4%
add-log-exp3.6%
add-sqr-sqrt4.9%
*-commutative4.9%
exp-lft-sqr4.9%
log-prod4.9%
add-log-exp8.7%
add-log-exp12.4%
Applied egg-rr12.4%
Applied egg-rr5.3%
(FPCore (x) :precision binary64 0.1111111111111111)
double code(double x) {
return 0.1111111111111111;
}
real(8) function code(x)
real(8), intent (in) :: x
code = 0.1111111111111111d0
end function
public static double code(double x) {
return 0.1111111111111111;
}
def code(x): return 0.1111111111111111
function code(x) return 0.1111111111111111 end
function tmp = code(x) tmp = 0.1111111111111111; end
code[x_] := 0.1111111111111111
\begin{array}{l}
\\
0.1111111111111111
\end{array}
Initial program 50.3%
sqrt-prod50.1%
sqrt-pow155.0%
metadata-eval55.0%
pow155.0%
Applied egg-rr55.0%
Taylor expanded in x around 0 55.0%
Simplified10.6%
add-sqr-sqrt9.3%
sqrt-unprod13.6%
swap-sqr13.6%
metadata-eval13.6%
metadata-eval13.6%
swap-sqr13.6%
*-commutative13.6%
*-commutative13.6%
sqrt-unprod11.4%
add-log-exp3.6%
add-sqr-sqrt4.9%
*-commutative4.9%
exp-lft-sqr4.9%
log-prod4.9%
add-log-exp8.7%
add-log-exp12.4%
Applied egg-rr12.4%
Applied egg-rr5.3%
(FPCore (x) :precision binary64 0.0)
double code(double x) {
return 0.0;
}
real(8) function code(x)
real(8), intent (in) :: x
code = 0.0d0
end function
public static double code(double x) {
return 0.0;
}
def code(x): return 0.0
function code(x) return 0.0 end
function tmp = code(x) tmp = 0.0; end
code[x_] := 0.0
\begin{array}{l}
\\
0
\end{array}
Initial program 50.3%
sqrt-prod50.1%
sqrt-pow155.0%
metadata-eval55.0%
pow155.0%
Applied egg-rr55.0%
Taylor expanded in x around 0 55.0%
Simplified10.6%
add-sqr-sqrt9.3%
sqrt-unprod13.6%
swap-sqr13.6%
metadata-eval13.6%
metadata-eval13.6%
swap-sqr13.6%
*-commutative13.6%
*-commutative13.6%
sqrt-unprod11.4%
add-log-exp3.6%
add-sqr-sqrt4.9%
*-commutative4.9%
exp-lft-sqr4.9%
log-prod4.9%
add-log-exp8.7%
add-log-exp12.4%
Applied egg-rr12.4%
Applied egg-rr3.9%
(FPCore (x) :precision binary64 -2.0)
double code(double x) {
return -2.0;
}
real(8) function code(x)
real(8), intent (in) :: x
code = -2.0d0
end function
public static double code(double x) {
return -2.0;
}
def code(x): return -2.0
function code(x) return -2.0 end
function tmp = code(x) tmp = -2.0; end
code[x_] := -2.0
\begin{array}{l}
\\
-2
\end{array}
Initial program 50.3%
sqrt-prod50.1%
sqrt-pow155.0%
metadata-eval55.0%
pow155.0%
Applied egg-rr55.0%
add-sqr-sqrt53.8%
sqrt-unprod50.1%
sqrt-prod50.3%
count-250.3%
flip-+0.0%
+-inverses0.0%
metadata-eval0.0%
+-inverses0.0%
+-inverses0.0%
+-inverses0.0%
metadata-eval0.0%
+-inverses0.0%
+-inverses0.0%
frac-times0.0%
flip-+0.0%
flip-+7.1%
sqrt-unprod7.3%
Applied egg-rr7.3%
Simplified1.7%
herbie shell --seed 2024132
(FPCore (x)
:name "sqrt D (should all be same)"
:precision binary64
(sqrt (* 2.0 (pow x 2.0))))