
(FPCore (x eps) :precision binary64 (- (tan (+ x eps)) (tan x)))
double code(double x, double eps) {
return tan((x + eps)) - tan(x);
}
real(8) function code(x, eps)
real(8), intent (in) :: x
real(8), intent (in) :: eps
code = tan((x + eps)) - tan(x)
end function
public static double code(double x, double eps) {
return Math.tan((x + eps)) - Math.tan(x);
}
def code(x, eps): return math.tan((x + eps)) - math.tan(x)
function code(x, eps) return Float64(tan(Float64(x + eps)) - tan(x)) end
function tmp = code(x, eps) tmp = tan((x + eps)) - tan(x); end
code[x_, eps_] := N[(N[Tan[N[(x + eps), $MachinePrecision]], $MachinePrecision] - N[Tan[x], $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\tan \left(x + \varepsilon\right) - \tan x
\end{array}
Sampling outcomes in binary64 precision:
Herbie found 11 alternatives:
| Alternative | Accuracy | Speedup |
|---|
(FPCore (x eps) :precision binary64 (- (tan (+ x eps)) (tan x)))
double code(double x, double eps) {
return tan((x + eps)) - tan(x);
}
real(8) function code(x, eps)
real(8), intent (in) :: x
real(8), intent (in) :: eps
code = tan((x + eps)) - tan(x)
end function
public static double code(double x, double eps) {
return Math.tan((x + eps)) - Math.tan(x);
}
def code(x, eps): return math.tan((x + eps)) - math.tan(x)
function code(x, eps) return Float64(tan(Float64(x + eps)) - tan(x)) end
function tmp = code(x, eps) tmp = tan((x + eps)) - tan(x); end
code[x_, eps_] := N[(N[Tan[N[(x + eps), $MachinePrecision]], $MachinePrecision] - N[Tan[x], $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\tan \left(x + \varepsilon\right) - \tan x
\end{array}
(FPCore (x eps)
:precision binary64
(let* ((t_0 (/ (sin x) (cos x))) (t_1 (pow t_0 2.0)) (t_2 (+ 1.0 t_1)))
(-
0.0
(*
(pow
(pow
(+
(+
1.0
(*
eps
(+
(* t_0 t_2)
(*
eps
(-
(-
(pow (* t_0 (hypot 1.0 t_0)) 2.0)
(fma -0.5 t_2 (* t_1 0.16666666666666666)))
0.16666666666666666)))))
(* (pow (sin x) 2.0) (pow (cos x) -2.0)))
3.0)
0.3333333333333333)
(- eps)))))
double code(double x, double eps) {
double t_0 = sin(x) / cos(x);
double t_1 = pow(t_0, 2.0);
double t_2 = 1.0 + t_1;
return 0.0 - (pow(pow(((1.0 + (eps * ((t_0 * t_2) + (eps * ((pow((t_0 * hypot(1.0, t_0)), 2.0) - fma(-0.5, t_2, (t_1 * 0.16666666666666666))) - 0.16666666666666666))))) + (pow(sin(x), 2.0) * pow(cos(x), -2.0))), 3.0), 0.3333333333333333) * -eps);
}
function code(x, eps) t_0 = Float64(sin(x) / cos(x)) t_1 = t_0 ^ 2.0 t_2 = Float64(1.0 + t_1) return Float64(0.0 - Float64(((Float64(Float64(1.0 + Float64(eps * Float64(Float64(t_0 * t_2) + Float64(eps * Float64(Float64((Float64(t_0 * hypot(1.0, t_0)) ^ 2.0) - fma(-0.5, t_2, Float64(t_1 * 0.16666666666666666))) - 0.16666666666666666))))) + Float64((sin(x) ^ 2.0) * (cos(x) ^ -2.0))) ^ 3.0) ^ 0.3333333333333333) * Float64(-eps))) end
code[x_, eps_] := Block[{t$95$0 = N[(N[Sin[x], $MachinePrecision] / N[Cos[x], $MachinePrecision]), $MachinePrecision]}, Block[{t$95$1 = N[Power[t$95$0, 2.0], $MachinePrecision]}, Block[{t$95$2 = N[(1.0 + t$95$1), $MachinePrecision]}, N[(0.0 - N[(N[Power[N[Power[N[(N[(1.0 + N[(eps * N[(N[(t$95$0 * t$95$2), $MachinePrecision] + N[(eps * N[(N[(N[Power[N[(t$95$0 * N[Sqrt[1.0 ^ 2 + t$95$0 ^ 2], $MachinePrecision]), $MachinePrecision], 2.0], $MachinePrecision] - N[(-0.5 * t$95$2 + N[(t$95$1 * 0.16666666666666666), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] - 0.16666666666666666), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] + N[(N[Power[N[Sin[x], $MachinePrecision], 2.0], $MachinePrecision] * N[Power[N[Cos[x], $MachinePrecision], -2.0], $MachinePrecision]), $MachinePrecision]), $MachinePrecision], 3.0], $MachinePrecision], 0.3333333333333333], $MachinePrecision] * (-eps)), $MachinePrecision]), $MachinePrecision]]]]
\begin{array}{l}
\\
\begin{array}{l}
t_0 := \frac{\sin x}{\cos x}\\
t_1 := {t\_0}^{2}\\
t_2 := 1 + t\_1\\
0 - {\left({\left(\left(1 + \varepsilon \cdot \left(t\_0 \cdot t\_2 + \varepsilon \cdot \left(\left({\left(t\_0 \cdot \mathsf{hypot}\left(1, t\_0\right)\right)}^{2} - \mathsf{fma}\left(-0.5, t\_2, t\_1 \cdot 0.16666666666666666\right)\right) - 0.16666666666666666\right)\right)\right) + {\sin x}^{2} \cdot {\cos x}^{-2}\right)}^{3}\right)}^{0.3333333333333333} \cdot \left(-\varepsilon\right)
\end{array}
\end{array}
Initial program 62.9%
Taylor expanded in eps around 0 99.6%
Applied egg-rr99.6%
Taylor expanded in eps around 0 99.6%
Applied egg-rr99.6%
Simplified99.6%
Final simplification99.6%
(FPCore (x eps) :precision binary64 (let* ((t_0 (/ (pow (sin x) 2.0) (pow (cos x) 2.0)))) (* eps (+ 1.0 (+ t_0 (* eps (* (sin x) (/ (+ 1.0 t_0) (cos x)))))))))
double code(double x, double eps) {
double t_0 = pow(sin(x), 2.0) / pow(cos(x), 2.0);
return eps * (1.0 + (t_0 + (eps * (sin(x) * ((1.0 + t_0) / cos(x))))));
}
real(8) function code(x, eps)
real(8), intent (in) :: x
real(8), intent (in) :: eps
real(8) :: t_0
t_0 = (sin(x) ** 2.0d0) / (cos(x) ** 2.0d0)
code = eps * (1.0d0 + (t_0 + (eps * (sin(x) * ((1.0d0 + t_0) / cos(x))))))
end function
public static double code(double x, double eps) {
double t_0 = Math.pow(Math.sin(x), 2.0) / Math.pow(Math.cos(x), 2.0);
return eps * (1.0 + (t_0 + (eps * (Math.sin(x) * ((1.0 + t_0) / Math.cos(x))))));
}
def code(x, eps): t_0 = math.pow(math.sin(x), 2.0) / math.pow(math.cos(x), 2.0) return eps * (1.0 + (t_0 + (eps * (math.sin(x) * ((1.0 + t_0) / math.cos(x))))))
function code(x, eps) t_0 = Float64((sin(x) ^ 2.0) / (cos(x) ^ 2.0)) return Float64(eps * Float64(1.0 + Float64(t_0 + Float64(eps * Float64(sin(x) * Float64(Float64(1.0 + t_0) / cos(x))))))) end
function tmp = code(x, eps) t_0 = (sin(x) ^ 2.0) / (cos(x) ^ 2.0); tmp = eps * (1.0 + (t_0 + (eps * (sin(x) * ((1.0 + t_0) / cos(x)))))); end
code[x_, eps_] := Block[{t$95$0 = N[(N[Power[N[Sin[x], $MachinePrecision], 2.0], $MachinePrecision] / N[Power[N[Cos[x], $MachinePrecision], 2.0], $MachinePrecision]), $MachinePrecision]}, N[(eps * N[(1.0 + N[(t$95$0 + N[(eps * N[(N[Sin[x], $MachinePrecision] * N[(N[(1.0 + t$95$0), $MachinePrecision] / N[Cos[x], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]]
\begin{array}{l}
\\
\begin{array}{l}
t_0 := \frac{{\sin x}^{2}}{{\cos x}^{2}}\\
\varepsilon \cdot \left(1 + \left(t\_0 + \varepsilon \cdot \left(\sin x \cdot \frac{1 + t\_0}{\cos x}\right)\right)\right)
\end{array}
\end{array}
Initial program 62.9%
Taylor expanded in eps around 0 99.6%
Applied egg-rr99.6%
Taylor expanded in eps around 0 99.5%
Simplified99.5%
(FPCore (x eps) :precision binary64 (* eps (+ (/ (pow (sin x) 2.0) (pow (cos x) 2.0)) (+ 1.0 (* eps (+ x (* eps 0.3333333333333333)))))))
double code(double x, double eps) {
return eps * ((pow(sin(x), 2.0) / pow(cos(x), 2.0)) + (1.0 + (eps * (x + (eps * 0.3333333333333333)))));
}
real(8) function code(x, eps)
real(8), intent (in) :: x
real(8), intent (in) :: eps
code = eps * (((sin(x) ** 2.0d0) / (cos(x) ** 2.0d0)) + (1.0d0 + (eps * (x + (eps * 0.3333333333333333d0)))))
end function
public static double code(double x, double eps) {
return eps * ((Math.pow(Math.sin(x), 2.0) / Math.pow(Math.cos(x), 2.0)) + (1.0 + (eps * (x + (eps * 0.3333333333333333)))));
}
def code(x, eps): return eps * ((math.pow(math.sin(x), 2.0) / math.pow(math.cos(x), 2.0)) + (1.0 + (eps * (x + (eps * 0.3333333333333333)))))
function code(x, eps) return Float64(eps * Float64(Float64((sin(x) ^ 2.0) / (cos(x) ^ 2.0)) + Float64(1.0 + Float64(eps * Float64(x + Float64(eps * 0.3333333333333333)))))) end
function tmp = code(x, eps) tmp = eps * (((sin(x) ^ 2.0) / (cos(x) ^ 2.0)) + (1.0 + (eps * (x + (eps * 0.3333333333333333))))); end
code[x_, eps_] := N[(eps * N[(N[(N[Power[N[Sin[x], $MachinePrecision], 2.0], $MachinePrecision] / N[Power[N[Cos[x], $MachinePrecision], 2.0], $MachinePrecision]), $MachinePrecision] + N[(1.0 + N[(eps * N[(x + N[(eps * 0.3333333333333333), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\varepsilon \cdot \left(\frac{{\sin x}^{2}}{{\cos x}^{2}} + \left(1 + \varepsilon \cdot \left(x + \varepsilon \cdot 0.3333333333333333\right)\right)\right)
\end{array}
Initial program 62.9%
Taylor expanded in eps around 0 99.6%
Taylor expanded in x around 0 99.3%
*-commutative99.3%
Simplified99.3%
Final simplification99.3%
(FPCore (x eps) :precision binary64 (* eps (+ 1.0 (pow (/ (sin x) (cos x)) 2.0))))
double code(double x, double eps) {
return eps * (1.0 + pow((sin(x) / cos(x)), 2.0));
}
real(8) function code(x, eps)
real(8), intent (in) :: x
real(8), intent (in) :: eps
code = eps * (1.0d0 + ((sin(x) / cos(x)) ** 2.0d0))
end function
public static double code(double x, double eps) {
return eps * (1.0 + Math.pow((Math.sin(x) / Math.cos(x)), 2.0));
}
def code(x, eps): return eps * (1.0 + math.pow((math.sin(x) / math.cos(x)), 2.0))
function code(x, eps) return Float64(eps * Float64(1.0 + (Float64(sin(x) / cos(x)) ^ 2.0))) end
function tmp = code(x, eps) tmp = eps * (1.0 + ((sin(x) / cos(x)) ^ 2.0)); end
code[x_, eps_] := N[(eps * N[(1.0 + N[Power[N[(N[Sin[x], $MachinePrecision] / N[Cos[x], $MachinePrecision]), $MachinePrecision], 2.0], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\varepsilon \cdot \left(1 + {\left(\frac{\sin x}{\cos x}\right)}^{2}\right)
\end{array}
Initial program 62.9%
add-cbrt-cube25.5%
pow1/324.9%
pow324.9%
Applied egg-rr24.9%
Taylor expanded in eps around 0 35.5%
sub-neg35.5%
mul-1-neg35.5%
remove-double-neg35.5%
Simplified35.5%
unpow1/337.8%
*-commutative37.8%
cbrt-prod37.8%
rem-cbrt-cube37.8%
rem-cbrt-cube99.1%
Applied egg-rr99.1%
Final simplification99.1%
(FPCore (x eps)
:precision binary64
(*
eps
(-
(+
1.0
(*
eps
(+
(* eps 0.3333333333333333)
(*
x
(+
1.0
(* x (+ (* eps 1.3333333333333333) (* x 1.3333333333333333))))))))
(* (pow x 2.0) (+ -1.0 (* (pow x 2.0) -0.6666666666666666))))))
double code(double x, double eps) {
return eps * ((1.0 + (eps * ((eps * 0.3333333333333333) + (x * (1.0 + (x * ((eps * 1.3333333333333333) + (x * 1.3333333333333333)))))))) - (pow(x, 2.0) * (-1.0 + (pow(x, 2.0) * -0.6666666666666666))));
}
real(8) function code(x, eps)
real(8), intent (in) :: x
real(8), intent (in) :: eps
code = eps * ((1.0d0 + (eps * ((eps * 0.3333333333333333d0) + (x * (1.0d0 + (x * ((eps * 1.3333333333333333d0) + (x * 1.3333333333333333d0)))))))) - ((x ** 2.0d0) * ((-1.0d0) + ((x ** 2.0d0) * (-0.6666666666666666d0)))))
end function
public static double code(double x, double eps) {
return eps * ((1.0 + (eps * ((eps * 0.3333333333333333) + (x * (1.0 + (x * ((eps * 1.3333333333333333) + (x * 1.3333333333333333)))))))) - (Math.pow(x, 2.0) * (-1.0 + (Math.pow(x, 2.0) * -0.6666666666666666))));
}
def code(x, eps): return eps * ((1.0 + (eps * ((eps * 0.3333333333333333) + (x * (1.0 + (x * ((eps * 1.3333333333333333) + (x * 1.3333333333333333)))))))) - (math.pow(x, 2.0) * (-1.0 + (math.pow(x, 2.0) * -0.6666666666666666))))
function code(x, eps) return Float64(eps * Float64(Float64(1.0 + Float64(eps * Float64(Float64(eps * 0.3333333333333333) + Float64(x * Float64(1.0 + Float64(x * Float64(Float64(eps * 1.3333333333333333) + Float64(x * 1.3333333333333333)))))))) - Float64((x ^ 2.0) * Float64(-1.0 + Float64((x ^ 2.0) * -0.6666666666666666))))) end
function tmp = code(x, eps) tmp = eps * ((1.0 + (eps * ((eps * 0.3333333333333333) + (x * (1.0 + (x * ((eps * 1.3333333333333333) + (x * 1.3333333333333333)))))))) - ((x ^ 2.0) * (-1.0 + ((x ^ 2.0) * -0.6666666666666666)))); end
code[x_, eps_] := N[(eps * N[(N[(1.0 + N[(eps * N[(N[(eps * 0.3333333333333333), $MachinePrecision] + N[(x * N[(1.0 + N[(x * N[(N[(eps * 1.3333333333333333), $MachinePrecision] + N[(x * 1.3333333333333333), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] - N[(N[Power[x, 2.0], $MachinePrecision] * N[(-1.0 + N[(N[Power[x, 2.0], $MachinePrecision] * -0.6666666666666666), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\varepsilon \cdot \left(\left(1 + \varepsilon \cdot \left(\varepsilon \cdot 0.3333333333333333 + x \cdot \left(1 + x \cdot \left(\varepsilon \cdot 1.3333333333333333 + x \cdot 1.3333333333333333\right)\right)\right)\right) - {x}^{2} \cdot \left(-1 + {x}^{2} \cdot -0.6666666666666666\right)\right)
\end{array}
Initial program 62.9%
Taylor expanded in eps around 0 99.6%
Taylor expanded in x around 0 99.2%
Taylor expanded in x around 0 98.7%
Final simplification98.7%
(FPCore (x eps) :precision binary64 (+ eps (* (pow x 2.0) (+ eps (* (pow x 2.0) (* eps 0.6666666666666666))))))
double code(double x, double eps) {
return eps + (pow(x, 2.0) * (eps + (pow(x, 2.0) * (eps * 0.6666666666666666))));
}
real(8) function code(x, eps)
real(8), intent (in) :: x
real(8), intent (in) :: eps
code = eps + ((x ** 2.0d0) * (eps + ((x ** 2.0d0) * (eps * 0.6666666666666666d0))))
end function
public static double code(double x, double eps) {
return eps + (Math.pow(x, 2.0) * (eps + (Math.pow(x, 2.0) * (eps * 0.6666666666666666))));
}
def code(x, eps): return eps + (math.pow(x, 2.0) * (eps + (math.pow(x, 2.0) * (eps * 0.6666666666666666))))
function code(x, eps) return Float64(eps + Float64((x ^ 2.0) * Float64(eps + Float64((x ^ 2.0) * Float64(eps * 0.6666666666666666))))) end
function tmp = code(x, eps) tmp = eps + ((x ^ 2.0) * (eps + ((x ^ 2.0) * (eps * 0.6666666666666666)))); end
code[x_, eps_] := N[(eps + N[(N[Power[x, 2.0], $MachinePrecision] * N[(eps + N[(N[Power[x, 2.0], $MachinePrecision] * N[(eps * 0.6666666666666666), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\varepsilon + {x}^{2} \cdot \left(\varepsilon + {x}^{2} \cdot \left(\varepsilon \cdot 0.6666666666666666\right)\right)
\end{array}
Initial program 62.9%
add-cbrt-cube25.5%
pow1/324.9%
pow324.9%
Applied egg-rr24.9%
Taylor expanded in eps around 0 35.5%
sub-neg35.5%
mul-1-neg35.5%
remove-double-neg35.5%
Simplified35.5%
Taylor expanded in x around 0 98.6%
associate-*r*98.6%
*-commutative98.6%
Simplified98.6%
Final simplification98.6%
(FPCore (x eps)
:precision binary64
(*
eps
(+
(+
1.0
(*
eps
(+
(* eps 0.3333333333333333)
(*
x
(+
1.0
(* x (+ (* eps 1.3333333333333333) (* x 1.3333333333333333))))))))
(pow x 2.0))))
double code(double x, double eps) {
return eps * ((1.0 + (eps * ((eps * 0.3333333333333333) + (x * (1.0 + (x * ((eps * 1.3333333333333333) + (x * 1.3333333333333333)))))))) + pow(x, 2.0));
}
real(8) function code(x, eps)
real(8), intent (in) :: x
real(8), intent (in) :: eps
code = eps * ((1.0d0 + (eps * ((eps * 0.3333333333333333d0) + (x * (1.0d0 + (x * ((eps * 1.3333333333333333d0) + (x * 1.3333333333333333d0)))))))) + (x ** 2.0d0))
end function
public static double code(double x, double eps) {
return eps * ((1.0 + (eps * ((eps * 0.3333333333333333) + (x * (1.0 + (x * ((eps * 1.3333333333333333) + (x * 1.3333333333333333)))))))) + Math.pow(x, 2.0));
}
def code(x, eps): return eps * ((1.0 + (eps * ((eps * 0.3333333333333333) + (x * (1.0 + (x * ((eps * 1.3333333333333333) + (x * 1.3333333333333333)))))))) + math.pow(x, 2.0))
function code(x, eps) return Float64(eps * Float64(Float64(1.0 + Float64(eps * Float64(Float64(eps * 0.3333333333333333) + Float64(x * Float64(1.0 + Float64(x * Float64(Float64(eps * 1.3333333333333333) + Float64(x * 1.3333333333333333)))))))) + (x ^ 2.0))) end
function tmp = code(x, eps) tmp = eps * ((1.0 + (eps * ((eps * 0.3333333333333333) + (x * (1.0 + (x * ((eps * 1.3333333333333333) + (x * 1.3333333333333333)))))))) + (x ^ 2.0)); end
code[x_, eps_] := N[(eps * N[(N[(1.0 + N[(eps * N[(N[(eps * 0.3333333333333333), $MachinePrecision] + N[(x * N[(1.0 + N[(x * N[(N[(eps * 1.3333333333333333), $MachinePrecision] + N[(x * 1.3333333333333333), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] + N[Power[x, 2.0], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\varepsilon \cdot \left(\left(1 + \varepsilon \cdot \left(\varepsilon \cdot 0.3333333333333333 + x \cdot \left(1 + x \cdot \left(\varepsilon \cdot 1.3333333333333333 + x \cdot 1.3333333333333333\right)\right)\right)\right) + {x}^{2}\right)
\end{array}
Initial program 62.9%
Taylor expanded in eps around 0 99.6%
Taylor expanded in x around 0 99.2%
Taylor expanded in x around 0 98.6%
mul-1-neg98.6%
Simplified98.6%
Final simplification98.6%
(FPCore (x eps) :precision binary64 (+ eps (* eps (pow x 2.0))))
double code(double x, double eps) {
return eps + (eps * pow(x, 2.0));
}
real(8) function code(x, eps)
real(8), intent (in) :: x
real(8), intent (in) :: eps
code = eps + (eps * (x ** 2.0d0))
end function
public static double code(double x, double eps) {
return eps + (eps * Math.pow(x, 2.0));
}
def code(x, eps): return eps + (eps * math.pow(x, 2.0))
function code(x, eps) return Float64(eps + Float64(eps * (x ^ 2.0))) end
function tmp = code(x, eps) tmp = eps + (eps * (x ^ 2.0)); end
code[x_, eps_] := N[(eps + N[(eps * N[Power[x, 2.0], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\varepsilon + \varepsilon \cdot {x}^{2}
\end{array}
Initial program 62.9%
add-cbrt-cube25.5%
pow1/324.9%
pow324.9%
Applied egg-rr24.9%
Taylor expanded in eps around 0 35.5%
sub-neg35.5%
mul-1-neg35.5%
remove-double-neg35.5%
Simplified35.5%
Taylor expanded in x around 0 98.5%
(FPCore (x eps) :precision binary64 (* eps (+ 1.0 (* 0.3333333333333333 (* eps eps)))))
double code(double x, double eps) {
return eps * (1.0 + (0.3333333333333333 * (eps * eps)));
}
real(8) function code(x, eps)
real(8), intent (in) :: x
real(8), intent (in) :: eps
code = eps * (1.0d0 + (0.3333333333333333d0 * (eps * eps)))
end function
public static double code(double x, double eps) {
return eps * (1.0 + (0.3333333333333333 * (eps * eps)));
}
def code(x, eps): return eps * (1.0 + (0.3333333333333333 * (eps * eps)))
function code(x, eps) return Float64(eps * Float64(1.0 + Float64(0.3333333333333333 * Float64(eps * eps)))) end
function tmp = code(x, eps) tmp = eps * (1.0 + (0.3333333333333333 * (eps * eps))); end
code[x_, eps_] := N[(eps * N[(1.0 + N[(0.3333333333333333 * N[(eps * eps), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\varepsilon \cdot \left(1 + 0.3333333333333333 \cdot \left(\varepsilon \cdot \varepsilon\right)\right)
\end{array}
Initial program 62.9%
Taylor expanded in eps around 0 99.6%
Taylor expanded in x around 0 98.2%
*-commutative98.2%
Simplified98.2%
unpow298.2%
Applied egg-rr98.2%
Final simplification98.2%
(FPCore (x eps) :precision binary64 eps)
double code(double x, double eps) {
return eps;
}
real(8) function code(x, eps)
real(8), intent (in) :: x
real(8), intent (in) :: eps
code = eps
end function
public static double code(double x, double eps) {
return eps;
}
def code(x, eps): return eps
function code(x, eps) return eps end
function tmp = code(x, eps) tmp = eps; end
code[x_, eps_] := eps
\begin{array}{l}
\\
\varepsilon
\end{array}
Initial program 62.9%
Taylor expanded in eps around 0 99.6%
Taylor expanded in x around 0 98.2%
*-commutative98.2%
Simplified98.2%
Taylor expanded in eps around 0 98.2%
(FPCore (x eps) :precision binary64 0.0)
double code(double x, double eps) {
return 0.0;
}
real(8) function code(x, eps)
real(8), intent (in) :: x
real(8), intent (in) :: eps
code = 0.0d0
end function
public static double code(double x, double eps) {
return 0.0;
}
def code(x, eps): return 0.0
function code(x, eps) return 0.0 end
function tmp = code(x, eps) tmp = 0.0; end
code[x_, eps_] := 0.0
\begin{array}{l}
\\
0
\end{array}
Initial program 62.9%
Taylor expanded in x around inf 5.4%
Taylor expanded in x around 0 5.4%
(FPCore (x eps) :precision binary64 (/ (sin eps) (* (cos x) (cos (+ x eps)))))
double code(double x, double eps) {
return sin(eps) / (cos(x) * cos((x + eps)));
}
real(8) function code(x, eps)
real(8), intent (in) :: x
real(8), intent (in) :: eps
code = sin(eps) / (cos(x) * cos((x + eps)))
end function
public static double code(double x, double eps) {
return Math.sin(eps) / (Math.cos(x) * Math.cos((x + eps)));
}
def code(x, eps): return math.sin(eps) / (math.cos(x) * math.cos((x + eps)))
function code(x, eps) return Float64(sin(eps) / Float64(cos(x) * cos(Float64(x + eps)))) end
function tmp = code(x, eps) tmp = sin(eps) / (cos(x) * cos((x + eps))); end
code[x_, eps_] := N[(N[Sin[eps], $MachinePrecision] / N[(N[Cos[x], $MachinePrecision] * N[Cos[N[(x + eps), $MachinePrecision]], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]
\begin{array}{l}
\\
\frac{\sin \varepsilon}{\cos x \cdot \cos \left(x + \varepsilon\right)}
\end{array}
herbie shell --seed 2024137
(FPCore (x eps)
:name "2tan (problem 3.3.2)"
:precision binary64
:pre (and (and (and (<= -10000.0 x) (<= x 10000.0)) (< (* 1e-16 (fabs x)) eps)) (< eps (fabs x)))
:alt
(! :herbie-platform default (/ (sin eps) (* (cos x) (cos (+ x eps)))))
(- (tan (+ x eps)) (tan x)))