mirror of
https://github.com/golang/go
synced 2024-11-18 07:14:44 -07:00
16200c7333
- changes tests to check that the real and imaginary part of the go complex division result is equal to the result gcc produces for c99 - changes complex division code to satisfy new complex division test - adds float functions isNan, isFinite, isInf, abs and copysign in the runtime package Fixes #14644. name old time/op new time/op delta Complex128DivNormal-4 21.8ns ± 6% 13.9ns ± 6% -36.37% (p=0.000 n=20+20) Complex128DivNisNaN-4 14.1ns ± 1% 15.0ns ± 1% +5.86% (p=0.000 n=20+19) Complex128DivDisNaN-4 12.5ns ± 1% 16.7ns ± 1% +33.79% (p=0.000 n=19+20) Complex128DivNisInf-4 10.1ns ± 1% 13.0ns ± 1% +28.25% (p=0.000 n=20+19) Complex128DivDisInf-4 11.0ns ± 1% 20.9ns ± 1% +90.69% (p=0.000 n=16+19) ComplexAlgMap-4 86.7ns ± 1% 86.8ns ± 2% ~ (p=0.804 n=20+20) Change-Id: I261f3b4a81f6cc858bc7ff48f6fd1b39c300abf0 Reviewed-on: https://go-review.googlesource.com/37441 Reviewed-by: Robert Griesemer <gri@golang.org>
45 lines
868 B
Go
45 lines
868 B
Go
// run cmplxdivide1.go
|
|
|
|
// Copyright 2010 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
// Driver for complex division table defined in cmplxdivide1.go
|
|
// For details, see the comment at the top of cmplxdivide.c.
|
|
|
|
package main
|
|
|
|
import (
|
|
"fmt"
|
|
"math"
|
|
)
|
|
|
|
func calike(a, b complex128) bool {
|
|
if imag(a) != imag(b) && !(math.IsNaN(imag(a)) && math.IsNaN(imag(b))) {
|
|
return false
|
|
}
|
|
|
|
if real(a) != real(b) && !(math.IsNaN(real(a)) && math.IsNaN(real(b))) {
|
|
return false
|
|
}
|
|
|
|
return true
|
|
}
|
|
|
|
func main() {
|
|
bad := false
|
|
for _, t := range tests {
|
|
x := t.f / t.g
|
|
if !calike(x, t.out) {
|
|
if !bad {
|
|
fmt.Printf("BUG\n")
|
|
bad = true
|
|
}
|
|
fmt.Printf("%v/%v: expected %v error; got %v\n", t.f, t.g, t.out, x)
|
|
}
|
|
}
|
|
if bad {
|
|
panic("cmplxdivide failed.")
|
|
}
|
|
}
|