
(FPCore (a b angle) :precision binary64 (let* ((t_0 (* (/ angle 180.0) (PI)))) (+ (pow (* a (sin t_0)) 2.0) (pow (* b (cos t_0)) 2.0))))
\begin{array}{l}
\\
\begin{array}{l}
t_0 := \frac{angle}{180} \cdot \mathsf{PI}\left(\right)\\
{\left(a \cdot \sin t\_0\right)}^{2} + {\left(b \cdot \cos t\_0\right)}^{2}
\end{array}
\end{array}
Sampling outcomes in binary64 precision:
Herbie found 8 alternatives:
| Alternative | Accuracy | Speedup |
|---|
(FPCore (a b angle) :precision binary64 (let* ((t_0 (* (/ angle 180.0) (PI)))) (+ (pow (* a (sin t_0)) 2.0) (pow (* b (cos t_0)) 2.0))))
\begin{array}{l}
\\
\begin{array}{l}
t_0 := \frac{angle}{180} \cdot \mathsf{PI}\left(\right)\\
{\left(a \cdot \sin t\_0\right)}^{2} + {\left(b \cdot \cos t\_0\right)}^{2}
\end{array}
\end{array}
(FPCore (a b angle) :precision binary64 (fma b b (pow (* (sin (* 0.005555555555555556 (* (PI) angle))) a) 2.0)))
\begin{array}{l}
\\
\mathsf{fma}\left(b, b, {\left(\sin \left(0.005555555555555556 \cdot \left(\mathsf{PI}\left(\right) \cdot angle\right)\right) \cdot a\right)}^{2}\right)
\end{array}
Initial program 77.7%
Taylor expanded in angle around 0
Applied rewrites77.9%
Taylor expanded in angle around inf
Applied rewrites77.9%
lift-+.f64N/A
+-commutativeN/A
lift-pow.f64N/A
unpow2N/A
lift-*.f64N/A
*-commutativeN/A
associate-*r*N/A
lower-fma.f64N/A
Applied rewrites77.9%
Taylor expanded in angle around 0
Applied rewrites77.9%
(FPCore (a b angle)
:precision binary64
(if (<= a 410000000.0)
(* b b)
(fma
(* (* 1.0 b) 1.0)
b
(pow (* (* (* (PI) angle) 0.005555555555555556) a) 2.0))))\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;a \leq 410000000:\\
\;\;\;\;b \cdot b\\
\mathbf{else}:\\
\;\;\;\;\mathsf{fma}\left(\left(1 \cdot b\right) \cdot 1, b, {\left(\left(\left(\mathsf{PI}\left(\right) \cdot angle\right) \cdot 0.005555555555555556\right) \cdot a\right)}^{2}\right)\\
\end{array}
\end{array}
if a < 4.1e8Initial program 77.0%
Taylor expanded in angle around 0
Applied rewrites65.3%
if 4.1e8 < a Initial program 79.9%
Taylor expanded in angle around 0
Applied rewrites80.0%
Taylor expanded in angle around inf
Applied rewrites80.0%
lift-+.f64N/A
+-commutativeN/A
lift-pow.f64N/A
unpow2N/A
lift-*.f64N/A
*-commutativeN/A
associate-*r*N/A
lower-fma.f64N/A
Applied rewrites80.0%
Taylor expanded in angle around 0
Applied rewrites76.2%
(FPCore (a b angle)
:precision binary64
(if (<= a 410000000.0)
(* b b)
(if (<= a 6.7e+165)
(fma
(* (* (* 3.08641975308642e-5 (* a a)) (PI)) (PI))
(* angle angle)
(* b b))
(* (* (* 3.08641975308642e-5 angle) (* (* (PI) (PI)) a)) (* a angle)))))\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;a \leq 410000000:\\
\;\;\;\;b \cdot b\\
\mathbf{elif}\;a \leq 6.7 \cdot 10^{+165}:\\
\;\;\;\;\mathsf{fma}\left(\left(\left(3.08641975308642 \cdot 10^{-5} \cdot \left(a \cdot a\right)\right) \cdot \mathsf{PI}\left(\right)\right) \cdot \mathsf{PI}\left(\right), angle \cdot angle, b \cdot b\right)\\
\mathbf{else}:\\
\;\;\;\;\left(\left(3.08641975308642 \cdot 10^{-5} \cdot angle\right) \cdot \left(\left(\mathsf{PI}\left(\right) \cdot \mathsf{PI}\left(\right)\right) \cdot a\right)\right) \cdot \left(a \cdot angle\right)\\
\end{array}
\end{array}
if a < 4.1e8Initial program 77.0%
Taylor expanded in angle around 0
Applied rewrites65.3%
if 4.1e8 < a < 6.70000000000000037e165Initial program 68.3%
Taylor expanded in angle around 0
Applied rewrites32.8%
Taylor expanded in a around inf
Applied rewrites57.9%
if 6.70000000000000037e165 < a Initial program 99.8%
Taylor expanded in angle around 0
Applied rewrites42.5%
Taylor expanded in a around inf
Applied rewrites72.2%
Applied rewrites75.5%
(FPCore (a b angle) :precision binary64 (if (<= a 2e+128) (* b b) (* (* (* 3.08641975308642e-5 angle) (* (* (PI) (PI)) a)) (* a angle))))
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;a \leq 2 \cdot 10^{+128}:\\
\;\;\;\;b \cdot b\\
\mathbf{else}:\\
\;\;\;\;\left(\left(3.08641975308642 \cdot 10^{-5} \cdot angle\right) \cdot \left(\left(\mathsf{PI}\left(\right) \cdot \mathsf{PI}\left(\right)\right) \cdot a\right)\right) \cdot \left(a \cdot angle\right)\\
\end{array}
\end{array}
if a < 2.0000000000000002e128Initial program 75.1%
Taylor expanded in angle around 0
Applied rewrites62.4%
if 2.0000000000000002e128 < a Initial program 93.1%
Taylor expanded in angle around 0
Applied rewrites36.4%
Taylor expanded in a around inf
Applied rewrites69.3%
Applied rewrites68.8%
(FPCore (a b angle) :precision binary64 (if (<= a 2e+128) (* b b) (* (* (PI) (* (* a (PI)) (* a angle))) (* 3.08641975308642e-5 angle))))
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;a \leq 2 \cdot 10^{+128}:\\
\;\;\;\;b \cdot b\\
\mathbf{else}:\\
\;\;\;\;\left(\mathsf{PI}\left(\right) \cdot \left(\left(a \cdot \mathsf{PI}\left(\right)\right) \cdot \left(a \cdot angle\right)\right)\right) \cdot \left(3.08641975308642 \cdot 10^{-5} \cdot angle\right)\\
\end{array}
\end{array}
if a < 2.0000000000000002e128Initial program 75.1%
Taylor expanded in angle around 0
Applied rewrites62.4%
if 2.0000000000000002e128 < a Initial program 93.1%
Taylor expanded in angle around 0
Applied rewrites36.4%
Taylor expanded in a around inf
Applied rewrites69.3%
Applied rewrites66.3%
(FPCore (a b angle) :precision binary64 (if (<= a 2e+128) (* b b) (* (* a (* (* (PI) (PI)) (* a angle))) (* 3.08641975308642e-5 angle))))
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;a \leq 2 \cdot 10^{+128}:\\
\;\;\;\;b \cdot b\\
\mathbf{else}:\\
\;\;\;\;\left(a \cdot \left(\left(\mathsf{PI}\left(\right) \cdot \mathsf{PI}\left(\right)\right) \cdot \left(a \cdot angle\right)\right)\right) \cdot \left(3.08641975308642 \cdot 10^{-5} \cdot angle\right)\\
\end{array}
\end{array}
if a < 2.0000000000000002e128Initial program 75.1%
Taylor expanded in angle around 0
Applied rewrites62.4%
if 2.0000000000000002e128 < a Initial program 93.1%
Taylor expanded in angle around 0
Applied rewrites36.4%
Taylor expanded in a around inf
Applied rewrites69.3%
Applied rewrites66.3%
(FPCore (a b angle) :precision binary64 (if (<= a 1.05e+152) (* b b) (* (* 3.08641975308642e-5 (* a a)) (* (* (PI) (PI)) (* angle angle)))))
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;a \leq 1.05 \cdot 10^{+152}:\\
\;\;\;\;b \cdot b\\
\mathbf{else}:\\
\;\;\;\;\left(3.08641975308642 \cdot 10^{-5} \cdot \left(a \cdot a\right)\right) \cdot \left(\left(\mathsf{PI}\left(\right) \cdot \mathsf{PI}\left(\right)\right) \cdot \left(angle \cdot angle\right)\right)\\
\end{array}
\end{array}
if a < 1.0500000000000001e152Initial program 74.9%
Taylor expanded in angle around 0
Applied rewrites62.0%
if 1.0500000000000001e152 < a Initial program 99.8%
Taylor expanded in angle around 0
Applied rewrites42.0%
Taylor expanded in a around inf
Applied rewrites77.0%
Taylor expanded in a around inf
Applied rewrites59.3%
(FPCore (a b angle) :precision binary64 (* b b))
double code(double a, double b, double angle) {
return b * b;
}
module fmin_fmax_functions
implicit none
private
public fmax
public fmin
interface fmax
module procedure fmax88
module procedure fmax44
module procedure fmax84
module procedure fmax48
end interface
interface fmin
module procedure fmin88
module procedure fmin44
module procedure fmin84
module procedure fmin48
end interface
contains
real(8) function fmax88(x, y) result (res)
real(8), intent (in) :: x
real(8), intent (in) :: y
res = merge(y, merge(x, max(x, y), y /= y), x /= x)
end function
real(4) function fmax44(x, y) result (res)
real(4), intent (in) :: x
real(4), intent (in) :: y
res = merge(y, merge(x, max(x, y), y /= y), x /= x)
end function
real(8) function fmax84(x, y) result(res)
real(8), intent (in) :: x
real(4), intent (in) :: y
res = merge(dble(y), merge(x, max(x, dble(y)), y /= y), x /= x)
end function
real(8) function fmax48(x, y) result(res)
real(4), intent (in) :: x
real(8), intent (in) :: y
res = merge(y, merge(dble(x), max(dble(x), y), y /= y), x /= x)
end function
real(8) function fmin88(x, y) result (res)
real(8), intent (in) :: x
real(8), intent (in) :: y
res = merge(y, merge(x, min(x, y), y /= y), x /= x)
end function
real(4) function fmin44(x, y) result (res)
real(4), intent (in) :: x
real(4), intent (in) :: y
res = merge(y, merge(x, min(x, y), y /= y), x /= x)
end function
real(8) function fmin84(x, y) result(res)
real(8), intent (in) :: x
real(4), intent (in) :: y
res = merge(dble(y), merge(x, min(x, dble(y)), y /= y), x /= x)
end function
real(8) function fmin48(x, y) result(res)
real(4), intent (in) :: x
real(8), intent (in) :: y
res = merge(y, merge(dble(x), min(dble(x), y), y /= y), x /= x)
end function
end module
real(8) function code(a, b, angle)
use fmin_fmax_functions
real(8), intent (in) :: a
real(8), intent (in) :: b
real(8), intent (in) :: angle
code = b * b
end function
public static double code(double a, double b, double angle) {
return b * b;
}
def code(a, b, angle): return b * b
function code(a, b, angle) return Float64(b * b) end
function tmp = code(a, b, angle) tmp = b * b; end
code[a_, b_, angle_] := N[(b * b), $MachinePrecision]
\begin{array}{l}
\\
b \cdot b
\end{array}
Initial program 77.7%
Taylor expanded in angle around 0
Applied rewrites59.5%
herbie shell --seed 2025019
(FPCore (a b angle)
:name "ab-angle->ABCF A"
:precision binary64
(+ (pow (* a (sin (* (/ angle 180.0) (PI)))) 2.0) (pow (* b (cos (* (/ angle 180.0) (PI)))) 2.0)))