
(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 (* (* 1.0 b) 1.0) b (pow (* (sin (* (* (PI) 0.005555555555555556) angle)) a) 2.0)))
\begin{array}{l}
\\
\mathsf{fma}\left(\left(1 \cdot b\right) \cdot 1, b, {\left(\sin \left(\left(\mathsf{PI}\left(\right) \cdot 0.005555555555555556\right) \cdot angle\right) \cdot a\right)}^{2}\right)
\end{array}
Initial program 80.9%
Taylor expanded in angle around 0
Applied rewrites81.1%
Taylor expanded in angle around inf
*-commutativeN/A
associate-*r*N/A
*-commutativeN/A
lower-sin.f64N/A
*-commutativeN/A
lower-*.f64N/A
lower-*.f64N/A
lower-PI.f6481.2
Applied rewrites81.2%
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 rewrites81.2%
(FPCore (a b angle)
:precision binary64
(if (<= a 1.7e-10)
(* b b)
(+
(pow (* a (* (* 0.005555555555555556 (PI)) angle)) 2.0)
(pow (* b 1.0) 2.0))))\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;a \leq 1.7 \cdot 10^{-10}:\\
\;\;\;\;b \cdot b\\
\mathbf{else}:\\
\;\;\;\;{\left(a \cdot \left(\left(0.005555555555555556 \cdot \mathsf{PI}\left(\right)\right) \cdot angle\right)\right)}^{2} + {\left(b \cdot 1\right)}^{2}\\
\end{array}
\end{array}
if a < 1.70000000000000007e-10Initial program 79.2%
Taylor expanded in angle around 0
unpow2N/A
lower-*.f6464.1
Applied rewrites64.1%
if 1.70000000000000007e-10 < a Initial program 86.4%
Taylor expanded in angle around 0
Applied rewrites86.4%
Taylor expanded in angle around 0
*-commutativeN/A
associate-*r*N/A
lower-*.f64N/A
lower-*.f64N/A
lower-PI.f6484.5
Applied rewrites84.5%
(FPCore (a b angle)
:precision binary64
(if (<= a 1.7e-10)
(* b b)
(+
(pow (* (* (* (PI) a) 0.005555555555555556) angle) 2.0)
(pow (* b 1.0) 2.0))))\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;a \leq 1.7 \cdot 10^{-10}:\\
\;\;\;\;b \cdot b\\
\mathbf{else}:\\
\;\;\;\;{\left(\left(\left(\mathsf{PI}\left(\right) \cdot a\right) \cdot 0.005555555555555556\right) \cdot angle\right)}^{2} + {\left(b \cdot 1\right)}^{2}\\
\end{array}
\end{array}
if a < 1.70000000000000007e-10Initial program 79.2%
Taylor expanded in angle around 0
unpow2N/A
lower-*.f6464.1
Applied rewrites64.1%
if 1.70000000000000007e-10 < a Initial program 86.4%
Taylor expanded in angle around 0
Applied rewrites86.4%
Taylor expanded in angle around 0
*-commutativeN/A
+-commutativeN/A
associate-*r*N/A
*-commutativeN/A
associate-*r*N/A
associate-*r*N/A
lower-*.f64N/A
Applied rewrites84.6%
Taylor expanded in angle around 0
Applied rewrites84.6%
(FPCore (a b angle)
:precision binary64
(if (<= a 1.7e-10)
(* b b)
(if (<= a 1.05e+242)
(fma
(* (* 3.08641975308642e-5 (* a a)) (* (PI) (PI)))
(* angle angle)
(* b b))
(* (pow (* (* (PI) angle) a) 2.0) 3.08641975308642e-5))))\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;a \leq 1.7 \cdot 10^{-10}:\\
\;\;\;\;b \cdot b\\
\mathbf{elif}\;a \leq 1.05 \cdot 10^{+242}:\\
\;\;\;\;\mathsf{fma}\left(\left(3.08641975308642 \cdot 10^{-5} \cdot \left(a \cdot a\right)\right) \cdot \left(\mathsf{PI}\left(\right) \cdot \mathsf{PI}\left(\right)\right), angle \cdot angle, b \cdot b\right)\\
\mathbf{else}:\\
\;\;\;\;{\left(\left(\mathsf{PI}\left(\right) \cdot angle\right) \cdot a\right)}^{2} \cdot 3.08641975308642 \cdot 10^{-5}\\
\end{array}
\end{array}
if a < 1.70000000000000007e-10Initial program 79.2%
Taylor expanded in angle around 0
unpow2N/A
lower-*.f6464.1
Applied rewrites64.1%
if 1.70000000000000007e-10 < a < 1.05e242Initial program 83.9%
Taylor expanded in angle around 0
*-commutativeN/A
lower-fma.f64N/A
Applied rewrites52.7%
Taylor expanded in a around inf
Applied rewrites76.9%
if 1.05e242 < a Initial program 93.4%
Taylor expanded in angle around 0
*-commutativeN/A
lower-fma.f64N/A
Applied rewrites63.7%
Taylor expanded in a around inf
Applied rewrites70.0%
Applied rewrites87.4%
(FPCore (a b angle)
:precision binary64
(if (<= a 1.7e-10)
(* b b)
(fma
(* (* 3.08641975308642e-5 (* a a)) (* (PI) (PI)))
(* angle angle)
(* b b))))\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;a \leq 1.7 \cdot 10^{-10}:\\
\;\;\;\;b \cdot b\\
\mathbf{else}:\\
\;\;\;\;\mathsf{fma}\left(\left(3.08641975308642 \cdot 10^{-5} \cdot \left(a \cdot a\right)\right) \cdot \left(\mathsf{PI}\left(\right) \cdot \mathsf{PI}\left(\right)\right), angle \cdot angle, b \cdot b\right)\\
\end{array}
\end{array}
if a < 1.70000000000000007e-10Initial program 79.2%
Taylor expanded in angle around 0
unpow2N/A
lower-*.f6464.1
Applied rewrites64.1%
if 1.70000000000000007e-10 < a Initial program 86.4%
Taylor expanded in angle around 0
*-commutativeN/A
lower-fma.f64N/A
Applied rewrites55.5%
Taylor expanded in a around inf
Applied rewrites75.1%
(FPCore (a b angle) :precision binary64 (if (<= a 8.5e+126) (* b b) (* (* (* (PI) (PI)) angle) (* angle (* (* 3.08641975308642e-5 a) a)))))
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;a \leq 8.5 \cdot 10^{+126}:\\
\;\;\;\;b \cdot b\\
\mathbf{else}:\\
\;\;\;\;\left(\left(\mathsf{PI}\left(\right) \cdot \mathsf{PI}\left(\right)\right) \cdot angle\right) \cdot \left(angle \cdot \left(\left(3.08641975308642 \cdot 10^{-5} \cdot a\right) \cdot a\right)\right)\\
\end{array}
\end{array}
if a < 8.49999999999999944e126Initial program 79.3%
Taylor expanded in angle around 0
unpow2N/A
lower-*.f6464.1
Applied rewrites64.1%
if 8.49999999999999944e126 < a Initial program 91.9%
Taylor expanded in angle around 0
*-commutativeN/A
lower-fma.f64N/A
Applied rewrites64.5%
Taylor expanded in a around inf
Applied rewrites76.7%
Applied rewrites80.0%
(FPCore (a b angle) :precision binary64 (if (<= a 1.3e+127) (* b b) (* (* 3.08641975308642e-5 (* a a)) (* (* (PI) (PI)) (* angle angle)))))
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;a \leq 1.3 \cdot 10^{+127}:\\
\;\;\;\;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 < 1.3000000000000001e127Initial program 79.3%
Taylor expanded in angle around 0
unpow2N/A
lower-*.f6464.1
Applied rewrites64.1%
if 1.3000000000000001e127 < a Initial program 91.9%
Taylor expanded in angle around 0
*-commutativeN/A
lower-fma.f64N/A
Applied rewrites64.5%
Taylor expanded in a around inf
Applied rewrites76.7%
(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 80.9%
Taylor expanded in angle around 0
unpow2N/A
lower-*.f6458.5
Applied rewrites58.5%
herbie shell --seed 2024350
(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)))