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e1e4c499f0
This CL add test cases for the unary FP negative operation. Change-Id: I54e7292ca9df05da0c2b113adefc97ee1e94c6e2 Reviewed-on: https://go-review.googlesource.com/c/go/+/190937 Run-TryBot: Ben Shi <powerman1st@163.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Keith Randall <khr@golang.org>
103 lines
1.6 KiB
Go
103 lines
1.6 KiB
Go
// run
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// Copyright 2018 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// (-0)+0 should be 0, not -0.
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package main
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//go:noinline
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func add64(x float64) float64 {
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return x + 0
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}
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func testAdd64() {
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var zero float64
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inf := 1.0 / zero
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negZero := -1 / inf
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if 1/add64(negZero) != inf {
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panic("negZero+0 != posZero (64 bit)")
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}
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}
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//go:noinline
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func sub64(x float64) float64 {
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return x - 0
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}
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func testSub64() {
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var zero float64
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inf := 1.0 / zero
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negZero := -1 / inf
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if 1/sub64(negZero) != -inf {
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panic("negZero-0 != negZero (64 bit)")
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}
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}
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//go:noinline
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func neg64(x float64) float64 {
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return -x
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}
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func testNeg64() {
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var zero float64
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inf := 1.0 / zero
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negZero := -1 / inf
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if 1/neg64(negZero) != inf {
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panic("-negZero != posZero (64 bit)")
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}
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}
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//go:noinline
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func add32(x float32) float32 {
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return x + 0
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}
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func testAdd32() {
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var zero float32
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inf := 1.0 / zero
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negZero := -1 / inf
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if 1/add32(negZero) != inf {
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panic("negZero+0 != posZero (32 bit)")
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}
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}
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//go:noinline
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func sub32(x float32) float32 {
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return x - 0
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}
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func testSub32() {
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var zero float32
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inf := 1.0 / zero
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negZero := -1 / inf
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if 1/sub32(negZero) != -inf {
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panic("negZero-0 != negZero (32 bit)")
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}
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}
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//go:noinline
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func neg32(x float32) float32 {
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return -x
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}
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func testNeg32() {
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var zero float32
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inf := 1.0 / zero
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negZero := -1 / inf
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if 1/neg32(negZero) != inf {
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panic("-negZero != posZero (32 bit)")
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}
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}
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func main() {
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testAdd64()
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testSub64()
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testNeg64()
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testAdd32()
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testSub32()
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testNeg32()
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}
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