Diagrams.ThreeD.Transform:aboutX from diagrams-lib-1.3.0.3, A

Average Error: 0.1 → 0.1

Time: 12.3s

Precision: binary64

Cost: 19584

Math

\[x \cdot \cos y - z \cdot \sin y \]

↓

\[\mathsf{fma}\left(\sin y, -z, x \cdot \cos y\right) \]

FPCore

(FPCore (x y z) :precision binary64 (- (* x (cos y)) (* z (sin y))))

↓

(FPCore (x y z) :precision binary64 (fma (sin y) (- z) (* x (cos y))))

C

double code(double x, double y, double z) {
	return (x * cos(y)) - (z * sin(y));
}

↓

double code(double x, double y, double z) {
	return fma(sin(y), -z, (x * cos(y)));
}

Julia

function code(x, y, z)
	return Float64(Float64(x * cos(y)) - Float64(z * sin(y)))
end

↓

function code(x, y, z)
	return fma(sin(y), Float64(-z), Float64(x * cos(y)))
end

Wolfram

code[x_, y_, z_] := N[(N[(x * N[Cos[y], $MachinePrecision]), $MachinePrecision] - N[(z * N[Sin[y], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]

↓

code[x_, y_, z_] := N[(N[Sin[y], $MachinePrecision] * (-z) + N[(x * N[Cos[y], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]

Derivation

1. Initial program 0.1

   \[x \cdot \cos y - z \cdot \sin y \]

2. Applied egg-rr 0.1

   \[\leadsto \color{blue}{\mathsf{fma}\left(\sin y, -z, x \cdot \cos y\right)} \]

3. Final simplification 0.1

   \[\leadsto \mathsf{fma}\left(\sin y, -z, x \cdot \cos y\right) \]

Alternatives

Alternative 1
Error	0.1
Cost	13248

\[x \cdot \cos y - \sin y \cdot z \]

Alternative 2
Error	8.8
Cost	6984

\[\begin{array}{l} t_0 := x - \sin y \cdot z\\ \mathbf{if}\;z \leq -7.88034839969052 \cdot 10^{-64}:\\ \;\;\;\;t_0\\ \mathbf{elif}\;z \leq 5.292818673244666 \cdot 10^{-80}:\\ \;\;\;\;x \cdot \cos y\\ \mathbf{else}:\\ \;\;\;\;t_0\\ \end{array} \]

Alternative 3
Error	17.2
Cost	6920

\[\begin{array}{l} t_0 := \sin y \cdot \left(-z\right)\\ \mathbf{if}\;z \leq -63029842523137.54:\\ \;\;\;\;t_0\\ \mathbf{elif}\;z \leq 0.028765265512643932:\\ \;\;\;\;x \cdot \cos y\\ \mathbf{else}:\\ \;\;\;\;t_0\\ \end{array} \]

Alternative 4
Error	16.4
Cost	6856

\[\begin{array}{l} t_0 := x \cdot \cos y\\ \mathbf{if}\;y \leq -70850467754341360:\\ \;\;\;\;t_0\\ \mathbf{elif}\;y \leq 0.019996371671775804:\\ \;\;\;\;x + y \cdot \left(\left(y \cdot x\right) \cdot \left(y \cdot \left(y \cdot 0.041666666666666664\right) + -0.5\right) - z\right)\\ \mathbf{else}:\\ \;\;\;\;t_0\\ \end{array} \]

Alternative 5
Error	38.9
Cost	520

\[\begin{array}{l} t_0 := y \cdot \left(-z\right)\\ \mathbf{if}\;z \leq -63029842523137.54:\\ \;\;\;\;t_0\\ \mathbf{elif}\;z \leq 2.89470786255451 \cdot 10^{+41}:\\ \;\;\;\;x\\ \mathbf{else}:\\ \;\;\;\;t_0\\ \end{array} \]

Alternative 6
Error	30.7
Cost	320

\[x - y \cdot z \]

Alternative 7
Error	38.7
Cost	64

\[x \]

Reproduce

herbie shell --seed 2022290 
(FPCore (x y z)
  :name "Diagrams.ThreeD.Transform:aboutX from diagrams-lib-1.3.0.3, A"
  :precision binary64
  (- (* x (cos y)) (* z (sin y))))