
(FPCore (B x) :precision binary64 (+ (- (* x (/ 1.0 (tan B)))) (/ 1.0 (sin B))))
double code(double B, double x) {
return -(x * (1.0 / tan(B))) + (1.0 / sin(B));
}
real(8) function code(b, x)
real(8), intent (in) :: b
real(8), intent (in) :: x
code = -(x * (1.0d0 / tan(b))) + (1.0d0 / sin(b))
end function
public static double code(double B, double x) {
return -(x * (1.0 / Math.tan(B))) + (1.0 / Math.sin(B));
}
def code(B, x): return -(x * (1.0 / math.tan(B))) + (1.0 / math.sin(B))
function code(B, x) return Float64(Float64(-Float64(x * Float64(1.0 / tan(B)))) + Float64(1.0 / sin(B))) end
function tmp = code(B, x) tmp = -(x * (1.0 / tan(B))) + (1.0 / sin(B)); end
code[B_, x_] := N[((-N[(x * N[(1.0 / N[Tan[B], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]) + N[(1.0 / N[Sin[B], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\left(-x \cdot \frac{1}{\tan B}\right) + \frac{1}{\sin B}
\end{array}
Sampling outcomes in binary64 precision:
Herbie found 10 alternatives:
| Alternative | Accuracy | Speedup |
|---|
(FPCore (B x) :precision binary64 (+ (- (* x (/ 1.0 (tan B)))) (/ 1.0 (sin B))))
double code(double B, double x) {
return -(x * (1.0 / tan(B))) + (1.0 / sin(B));
}
real(8) function code(b, x)
real(8), intent (in) :: b
real(8), intent (in) :: x
code = -(x * (1.0d0 / tan(b))) + (1.0d0 / sin(b))
end function
public static double code(double B, double x) {
return -(x * (1.0 / Math.tan(B))) + (1.0 / Math.sin(B));
}
def code(B, x): return -(x * (1.0 / math.tan(B))) + (1.0 / math.sin(B))
function code(B, x) return Float64(Float64(-Float64(x * Float64(1.0 / tan(B)))) + Float64(1.0 / sin(B))) end
function tmp = code(B, x) tmp = -(x * (1.0 / tan(B))) + (1.0 / sin(B)); end
code[B_, x_] := N[((-N[(x * N[(1.0 / N[Tan[B], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]) + N[(1.0 / N[Sin[B], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\left(-x \cdot \frac{1}{\tan B}\right) + \frac{1}{\sin B}
\end{array}
(FPCore (B x) :precision binary64 (- (/ 1.0 (sin B)) (/ x (tan B))))
double code(double B, double x) {
return (1.0 / sin(B)) - (x / tan(B));
}
real(8) function code(b, x)
real(8), intent (in) :: b
real(8), intent (in) :: x
code = (1.0d0 / sin(b)) - (x / tan(b))
end function
public static double code(double B, double x) {
return (1.0 / Math.sin(B)) - (x / Math.tan(B));
}
def code(B, x): return (1.0 / math.sin(B)) - (x / math.tan(B))
function code(B, x) return Float64(Float64(1.0 / sin(B)) - Float64(x / tan(B))) end
function tmp = code(B, x) tmp = (1.0 / sin(B)) - (x / tan(B)); end
code[B_, x_] := N[(N[(1.0 / N[Sin[B], $MachinePrecision]), $MachinePrecision] - N[(x / N[Tan[B], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\frac{1}{\sin B} - \frac{x}{\tan B}
\end{array}
Initial program 99.7%
distribute-lft-neg-in99.7%
+-commutative99.7%
cancel-sign-sub-inv99.7%
*-commutative99.7%
*-commutative99.7%
associate-*r/99.7%
*-rgt-identity99.7%
Simplified99.7%
Final simplification99.7%
(FPCore (B x) :precision binary64 (if (or (<= x -1.7) (not (<= x 7.2))) (- (/ 1.0 B) (/ x (tan B))) (/ (- 1.0 x) (sin B))))
double code(double B, double x) {
double tmp;
if ((x <= -1.7) || !(x <= 7.2)) {
tmp = (1.0 / B) - (x / tan(B));
} else {
tmp = (1.0 - x) / sin(B);
}
return tmp;
}
real(8) function code(b, x)
real(8), intent (in) :: b
real(8), intent (in) :: x
real(8) :: tmp
if ((x <= (-1.7d0)) .or. (.not. (x <= 7.2d0))) then
tmp = (1.0d0 / b) - (x / tan(b))
else
tmp = (1.0d0 - x) / sin(b)
end if
code = tmp
end function
public static double code(double B, double x) {
double tmp;
if ((x <= -1.7) || !(x <= 7.2)) {
tmp = (1.0 / B) - (x / Math.tan(B));
} else {
tmp = (1.0 - x) / Math.sin(B);
}
return tmp;
}
def code(B, x): tmp = 0 if (x <= -1.7) or not (x <= 7.2): tmp = (1.0 / B) - (x / math.tan(B)) else: tmp = (1.0 - x) / math.sin(B) return tmp
function code(B, x) tmp = 0.0 if ((x <= -1.7) || !(x <= 7.2)) tmp = Float64(Float64(1.0 / B) - Float64(x / tan(B))); else tmp = Float64(Float64(1.0 - x) / sin(B)); end return tmp end
function tmp_2 = code(B, x) tmp = 0.0; if ((x <= -1.7) || ~((x <= 7.2))) tmp = (1.0 / B) - (x / tan(B)); else tmp = (1.0 - x) / sin(B); end tmp_2 = tmp; end
code[B_, x_] := If[Or[LessEqual[x, -1.7], N[Not[LessEqual[x, 7.2]], $MachinePrecision]], N[(N[(1.0 / B), $MachinePrecision] - N[(x / N[Tan[B], $MachinePrecision]), $MachinePrecision]), $MachinePrecision], N[(N[(1.0 - x), $MachinePrecision] / N[Sin[B], $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -1.7 \lor \neg \left(x \leq 7.2\right):\\
\;\;\;\;\frac{1}{B} - \frac{x}{\tan B}\\
\mathbf{else}:\\
\;\;\;\;\frac{1 - x}{\sin B}\\
\end{array}
\end{array}
if x < -1.69999999999999996 or 7.20000000000000018 < x Initial program 99.6%
distribute-lft-neg-in99.6%
+-commutative99.6%
cancel-sign-sub-inv99.6%
*-commutative99.6%
*-commutative99.6%
associate-*r/99.7%
*-rgt-identity99.7%
Simplified99.7%
Taylor expanded in B around 0 68.4%
Taylor expanded in B around 0 98.8%
if -1.69999999999999996 < x < 7.20000000000000018Initial program 99.8%
distribute-lft-neg-in99.8%
+-commutative99.8%
cancel-sign-sub-inv99.8%
*-commutative99.8%
*-commutative99.8%
associate-*r/99.8%
*-rgt-identity99.8%
Simplified99.8%
tan-quot99.8%
associate-/r/99.8%
Applied egg-rr99.8%
Taylor expanded in B around inf 99.8%
*-commutative99.8%
div-sub99.8%
*-commutative99.8%
Simplified99.8%
Taylor expanded in B around 0 97.7%
Final simplification98.3%
(FPCore (B x)
:precision binary64
(if (or (<= B -0.48) (not (<= B 0.031)))
(/ 1.0 (sin B))
(-
(+ (/ 1.0 B) (* B (+ 0.16666666666666666 (* x 0.3333333333333333))))
(/ x B))))
double code(double B, double x) {
double tmp;
if ((B <= -0.48) || !(B <= 0.031)) {
tmp = 1.0 / sin(B);
} else {
tmp = ((1.0 / B) + (B * (0.16666666666666666 + (x * 0.3333333333333333)))) - (x / B);
}
return tmp;
}
real(8) function code(b, x)
real(8), intent (in) :: b
real(8), intent (in) :: x
real(8) :: tmp
if ((b <= (-0.48d0)) .or. (.not. (b <= 0.031d0))) then
tmp = 1.0d0 / sin(b)
else
tmp = ((1.0d0 / b) + (b * (0.16666666666666666d0 + (x * 0.3333333333333333d0)))) - (x / b)
end if
code = tmp
end function
public static double code(double B, double x) {
double tmp;
if ((B <= -0.48) || !(B <= 0.031)) {
tmp = 1.0 / Math.sin(B);
} else {
tmp = ((1.0 / B) + (B * (0.16666666666666666 + (x * 0.3333333333333333)))) - (x / B);
}
return tmp;
}
def code(B, x): tmp = 0 if (B <= -0.48) or not (B <= 0.031): tmp = 1.0 / math.sin(B) else: tmp = ((1.0 / B) + (B * (0.16666666666666666 + (x * 0.3333333333333333)))) - (x / B) return tmp
function code(B, x) tmp = 0.0 if ((B <= -0.48) || !(B <= 0.031)) tmp = Float64(1.0 / sin(B)); else tmp = Float64(Float64(Float64(1.0 / B) + Float64(B * Float64(0.16666666666666666 + Float64(x * 0.3333333333333333)))) - Float64(x / B)); end return tmp end
function tmp_2 = code(B, x) tmp = 0.0; if ((B <= -0.48) || ~((B <= 0.031))) tmp = 1.0 / sin(B); else tmp = ((1.0 / B) + (B * (0.16666666666666666 + (x * 0.3333333333333333)))) - (x / B); end tmp_2 = tmp; end
code[B_, x_] := If[Or[LessEqual[B, -0.48], N[Not[LessEqual[B, 0.031]], $MachinePrecision]], N[(1.0 / N[Sin[B], $MachinePrecision]), $MachinePrecision], N[(N[(N[(1.0 / B), $MachinePrecision] + N[(B * N[(0.16666666666666666 + N[(x * 0.3333333333333333), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] - N[(x / B), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;B \leq -0.48 \lor \neg \left(B \leq 0.031\right):\\
\;\;\;\;\frac{1}{\sin B}\\
\mathbf{else}:\\
\;\;\;\;\left(\frac{1}{B} + B \cdot \left(0.16666666666666666 + x \cdot 0.3333333333333333\right)\right) - \frac{x}{B}\\
\end{array}
\end{array}
if B < -0.47999999999999998 or 0.031 < B Initial program 99.5%
distribute-lft-neg-in99.5%
+-commutative99.5%
distribute-lft-neg-in99.5%
distribute-rgt-neg-in99.5%
Simplified99.5%
Taylor expanded in x around 0 41.8%
if -0.47999999999999998 < B < 0.031Initial program 99.9%
distribute-lft-neg-in99.9%
+-commutative99.9%
cancel-sign-sub-inv99.9%
*-commutative99.9%
*-commutative99.9%
associate-*r/100.0%
*-rgt-identity100.0%
Simplified100.0%
Taylor expanded in B around 0 99.2%
Final simplification69.1%
(FPCore (B x) :precision binary64 (/ (- 1.0 x) (sin B)))
double code(double B, double x) {
return (1.0 - x) / sin(B);
}
real(8) function code(b, x)
real(8), intent (in) :: b
real(8), intent (in) :: x
code = (1.0d0 - x) / sin(b)
end function
public static double code(double B, double x) {
return (1.0 - x) / Math.sin(B);
}
def code(B, x): return (1.0 - x) / math.sin(B)
function code(B, x) return Float64(Float64(1.0 - x) / sin(B)) end
function tmp = code(B, x) tmp = (1.0 - x) / sin(B); end
code[B_, x_] := N[(N[(1.0 - x), $MachinePrecision] / N[Sin[B], $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\frac{1 - x}{\sin B}
\end{array}
Initial program 99.7%
distribute-lft-neg-in99.7%
+-commutative99.7%
cancel-sign-sub-inv99.7%
*-commutative99.7%
*-commutative99.7%
associate-*r/99.7%
*-rgt-identity99.7%
Simplified99.7%
tan-quot99.7%
associate-/r/99.7%
Applied egg-rr99.7%
Taylor expanded in B around inf 99.7%
*-commutative99.7%
div-sub99.7%
*-commutative99.7%
Simplified99.7%
Taylor expanded in B around 0 71.3%
Final simplification71.3%
(FPCore (B x) :precision binary64 (+ (* 0.3333333333333333 (* B x)) (/ (- 1.0 x) B)))
double code(double B, double x) {
return (0.3333333333333333 * (B * x)) + ((1.0 - x) / B);
}
real(8) function code(b, x)
real(8), intent (in) :: b
real(8), intent (in) :: x
code = (0.3333333333333333d0 * (b * x)) + ((1.0d0 - x) / b)
end function
public static double code(double B, double x) {
return (0.3333333333333333 * (B * x)) + ((1.0 - x) / B);
}
def code(B, x): return (0.3333333333333333 * (B * x)) + ((1.0 - x) / B)
function code(B, x) return Float64(Float64(0.3333333333333333 * Float64(B * x)) + Float64(Float64(1.0 - x) / B)) end
function tmp = code(B, x) tmp = (0.3333333333333333 * (B * x)) + ((1.0 - x) / B); end
code[B_, x_] := N[(N[(0.3333333333333333 * N[(B * x), $MachinePrecision]), $MachinePrecision] + N[(N[(1.0 - x), $MachinePrecision] / B), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
0.3333333333333333 \cdot \left(B \cdot x\right) + \frac{1 - x}{B}
\end{array}
Initial program 99.7%
distribute-lft-neg-in99.7%
+-commutative99.7%
distribute-lft-neg-in99.7%
distribute-rgt-neg-in99.7%
Simplified99.7%
Taylor expanded in B around 0 49.1%
+-commutative49.1%
mul-1-neg49.1%
sub-neg49.1%
associate--l+49.1%
*-commutative49.1%
*-commutative49.1%
div-sub49.1%
Simplified49.1%
Taylor expanded in x around inf 49.2%
Final simplification49.2%
(FPCore (B x) :precision binary64 (+ (/ (- 1.0 x) B) (* B 0.16666666666666666)))
double code(double B, double x) {
return ((1.0 - x) / B) + (B * 0.16666666666666666);
}
real(8) function code(b, x)
real(8), intent (in) :: b
real(8), intent (in) :: x
code = ((1.0d0 - x) / b) + (b * 0.16666666666666666d0)
end function
public static double code(double B, double x) {
return ((1.0 - x) / B) + (B * 0.16666666666666666);
}
def code(B, x): return ((1.0 - x) / B) + (B * 0.16666666666666666)
function code(B, x) return Float64(Float64(Float64(1.0 - x) / B) + Float64(B * 0.16666666666666666)) end
function tmp = code(B, x) tmp = ((1.0 - x) / B) + (B * 0.16666666666666666); end
code[B_, x_] := N[(N[(N[(1.0 - x), $MachinePrecision] / B), $MachinePrecision] + N[(B * 0.16666666666666666), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\frac{1 - x}{B} + B \cdot 0.16666666666666666
\end{array}
Initial program 99.7%
distribute-lft-neg-in99.7%
+-commutative99.7%
distribute-lft-neg-in99.7%
distribute-rgt-neg-in99.7%
Simplified99.7%
Taylor expanded in B around 0 49.1%
+-commutative49.1%
mul-1-neg49.1%
sub-neg49.1%
associate--l+49.1%
*-commutative49.1%
*-commutative49.1%
div-sub49.1%
Simplified49.1%
Taylor expanded in x around 0 48.7%
*-commutative48.7%
Simplified48.7%
Final simplification48.7%
(FPCore (B x) :precision binary64 (if (or (<= x -2.6e+14) (not (<= x 1.0))) (/ (- x) B) (/ 1.0 B)))
double code(double B, double x) {
double tmp;
if ((x <= -2.6e+14) || !(x <= 1.0)) {
tmp = -x / B;
} else {
tmp = 1.0 / B;
}
return tmp;
}
real(8) function code(b, x)
real(8), intent (in) :: b
real(8), intent (in) :: x
real(8) :: tmp
if ((x <= (-2.6d+14)) .or. (.not. (x <= 1.0d0))) then
tmp = -x / b
else
tmp = 1.0d0 / b
end if
code = tmp
end function
public static double code(double B, double x) {
double tmp;
if ((x <= -2.6e+14) || !(x <= 1.0)) {
tmp = -x / B;
} else {
tmp = 1.0 / B;
}
return tmp;
}
def code(B, x): tmp = 0 if (x <= -2.6e+14) or not (x <= 1.0): tmp = -x / B else: tmp = 1.0 / B return tmp
function code(B, x) tmp = 0.0 if ((x <= -2.6e+14) || !(x <= 1.0)) tmp = Float64(Float64(-x) / B); else tmp = Float64(1.0 / B); end return tmp end
function tmp_2 = code(B, x) tmp = 0.0; if ((x <= -2.6e+14) || ~((x <= 1.0))) tmp = -x / B; else tmp = 1.0 / B; end tmp_2 = tmp; end
code[B_, x_] := If[Or[LessEqual[x, -2.6e+14], N[Not[LessEqual[x, 1.0]], $MachinePrecision]], N[((-x) / B), $MachinePrecision], N[(1.0 / B), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
\mathbf{if}\;x \leq -2.6 \cdot 10^{+14} \lor \neg \left(x \leq 1\right):\\
\;\;\;\;\frac{-x}{B}\\
\mathbf{else}:\\
\;\;\;\;\frac{1}{B}\\
\end{array}
\end{array}
if x < -2.6e14 or 1 < x Initial program 99.6%
distribute-lft-neg-in99.6%
+-commutative99.6%
distribute-lft-neg-in99.6%
distribute-rgt-neg-in99.6%
Simplified99.6%
Taylor expanded in B around 0 44.0%
neg-mul-144.0%
sub-neg44.0%
Simplified44.0%
Taylor expanded in x around inf 43.1%
neg-mul-143.1%
distribute-neg-frac43.1%
Simplified43.1%
if -2.6e14 < x < 1Initial program 99.8%
distribute-lft-neg-in99.8%
+-commutative99.8%
distribute-lft-neg-in99.8%
distribute-rgt-neg-in99.8%
Simplified99.8%
Taylor expanded in B around 0 54.0%
neg-mul-154.0%
sub-neg54.0%
Simplified54.0%
Taylor expanded in x around 0 52.7%
Final simplification47.7%
(FPCore (B x) :precision binary64 (- (/ 1.0 B) (/ x B)))
double code(double B, double x) {
return (1.0 / B) - (x / B);
}
real(8) function code(b, x)
real(8), intent (in) :: b
real(8), intent (in) :: x
code = (1.0d0 / b) - (x / b)
end function
public static double code(double B, double x) {
return (1.0 / B) - (x / B);
}
def code(B, x): return (1.0 / B) - (x / B)
function code(B, x) return Float64(Float64(1.0 / B) - Float64(x / B)) end
function tmp = code(B, x) tmp = (1.0 / B) - (x / B); end
code[B_, x_] := N[(N[(1.0 / B), $MachinePrecision] - N[(x / B), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\frac{1}{B} - \frac{x}{B}
\end{array}
Initial program 99.7%
distribute-lft-neg-in99.7%
+-commutative99.7%
distribute-lft-neg-in99.7%
distribute-rgt-neg-in99.7%
Simplified99.7%
Taylor expanded in B around 0 48.7%
neg-mul-148.7%
sub-neg48.7%
Simplified48.7%
div-sub48.7%
Applied egg-rr48.7%
Final simplification48.7%
(FPCore (B x) :precision binary64 (/ (- 1.0 x) B))
double code(double B, double x) {
return (1.0 - x) / B;
}
real(8) function code(b, x)
real(8), intent (in) :: b
real(8), intent (in) :: x
code = (1.0d0 - x) / b
end function
public static double code(double B, double x) {
return (1.0 - x) / B;
}
def code(B, x): return (1.0 - x) / B
function code(B, x) return Float64(Float64(1.0 - x) / B) end
function tmp = code(B, x) tmp = (1.0 - x) / B; end
code[B_, x_] := N[(N[(1.0 - x), $MachinePrecision] / B), $MachinePrecision]
\begin{array}{l}
\\
\frac{1 - x}{B}
\end{array}
Initial program 99.7%
distribute-lft-neg-in99.7%
+-commutative99.7%
distribute-lft-neg-in99.7%
distribute-rgt-neg-in99.7%
Simplified99.7%
Taylor expanded in B around 0 48.7%
neg-mul-148.7%
sub-neg48.7%
Simplified48.7%
Final simplification48.7%
(FPCore (B x) :precision binary64 (/ 1.0 B))
double code(double B, double x) {
return 1.0 / B;
}
real(8) function code(b, x)
real(8), intent (in) :: b
real(8), intent (in) :: x
code = 1.0d0 / b
end function
public static double code(double B, double x) {
return 1.0 / B;
}
def code(B, x): return 1.0 / B
function code(B, x) return Float64(1.0 / B) end
function tmp = code(B, x) tmp = 1.0 / B; end
code[B_, x_] := N[(1.0 / B), $MachinePrecision]
\begin{array}{l}
\\
\frac{1}{B}
\end{array}
Initial program 99.7%
distribute-lft-neg-in99.7%
+-commutative99.7%
distribute-lft-neg-in99.7%
distribute-rgt-neg-in99.7%
Simplified99.7%
Taylor expanded in B around 0 48.7%
neg-mul-148.7%
sub-neg48.7%
Simplified48.7%
Taylor expanded in x around 0 26.4%
Final simplification26.4%
herbie shell --seed 2023263
(FPCore (B x)
:name "VandenBroeck and Keller, Equation (24)"
:precision binary64
(+ (- (* x (/ 1.0 (tan B)))) (/ 1.0 (sin B))))