?

\[x \cdot y + z \cdot \left(1 - y\right) \]

↓

\[\mathsf{fma}\left(z, 1 - y, y \cdot x\right) \]

(FPCore (x y z) :precision binary64 (+ (* x y) (* z (- 1.0 y))))

↓

(FPCore (x y z) :precision binary64 (fma z (- 1.0 y) (* y x)))

double code(double x, double y, double z) {
	return (x * y) + (z * (1.0 - y));
}

↓

double code(double x, double y, double z) {
	return fma(z, (1.0 - y), (y * x));
}

function code(x, y, z)
	return Float64(Float64(x * y) + Float64(z * Float64(1.0 - y)))
end

↓

function code(x, y, z)
	return fma(z, Float64(1.0 - y), Float64(y * x))
end

code[x_, y_, z_] := N[(N[(x * y), $MachinePrecision] + N[(z * N[(1.0 - y), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]

↓

code[x_, y_, z_] := N[(z * N[(1.0 - y), $MachinePrecision] + N[(y * x), $MachinePrecision]), $MachinePrecision]

x \cdot y + z \cdot \left(1 - y\right)

↓

\mathsf{fma}\left(z, 1 - y, y \cdot x\right)

Original	0.0
Target	0.0
Herbie	0.0

Derivation?

Initial program 0.0
\[x \cdot y + z \cdot \left(1 - y\right) \]

Simplified0.0

\[\leadsto \color{blue}{\mathsf{fma}\left(z, 1 - y, x \cdot y\right)} \]

Proof

[Start]0.0	\[ x \cdot y + z \cdot \left(1 - y\right) \]
+-commutative [=>]0.0	\[ \color{blue}{z \cdot \left(1 - y\right) + x \cdot y} \]
fma-def [=>]0.0	\[ \color{blue}{\mathsf{fma}\left(z, 1 - y, x \cdot y\right)} \]

Final simplification0.0
\[\leadsto \mathsf{fma}\left(z, 1 - y, y \cdot x\right) \]

Alternatives

Alternative 1
Error	1.1
Cost	716

\[\begin{array}{l} t_0 := y \cdot \left(x - z\right)\\ \mathbf{if}\;y \leq -720000:\\ \;\;\;\;t_0\\ \mathbf{elif}\;y \leq 1.65 \cdot 10^{-13}:\\ \;\;\;\;z + y \cdot x\\ \mathbf{elif}\;y \leq 170000000:\\ \;\;\;\;z \cdot \left(1 - y\right)\\ \mathbf{else}:\\ \;\;\;\;t_0\\ \end{array} \]

Alternative 2
Error	12.4
Cost	585

\[\begin{array}{l} \mathbf{if}\;y \leq -1.92 \cdot 10^{-28} \lor \neg \left(y \leq 3.4 \cdot 10^{-18}\right):\\ \;\;\;\;y \cdot \left(x - z\right)\\ \mathbf{else}:\\ \;\;\;\;z\\ \end{array} \]

Alternative 3
Error	12.4
Cost	585

\[\begin{array}{l} \mathbf{if}\;y \leq -1.46 \cdot 10^{-28} \lor \neg \left(y \leq 11500000\right):\\ \;\;\;\;y \cdot \left(x - z\right)\\ \mathbf{else}:\\ \;\;\;\;z \cdot \left(1 - y\right)\\ \end{array} \]

Alternative 4
Error	0.0
Cost	576

\[z \cdot \left(1 - y\right) + y \cdot x \]

Alternative 5
Error	24.4
Cost	521

\[\begin{array}{l} \mathbf{if}\;y \leq -720000 \lor \neg \left(y \leq 1\right):\\ \;\;\;\;z \cdot \left(-y\right)\\ \mathbf{else}:\\ \;\;\;\;z\\ \end{array} \]

Alternative 6
Error	24.2
Cost	456

\[\begin{array}{l} \mathbf{if}\;y \leq -2.2 \cdot 10^{-28}:\\ \;\;\;\;y \cdot x\\ \mathbf{elif}\;y \leq 2.2 \cdot 10^{-18}:\\ \;\;\;\;z\\ \mathbf{else}:\\ \;\;\;\;y \cdot x\\ \end{array} \]

Alternative 7
Error	0.0
Cost	448

\[z + y \cdot \left(x - z\right) \]

Alternative 8
Error	35.5
Cost	64

\[z \]

Reproduce?

herbie shell --seed 2023039 
(FPCore (x y z)
  :name "Diagrams.TwoD.Segment:bezierClip from diagrams-lib-1.3.0.3"
  :precision binary64

  :herbie-target
  (- z (* (- z x) y))

  (+ (* x y) (* z (- 1.0 y))))

?

?

Error?

Target

Derivation?

Alternatives

Error

Reproduce?