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test: add test for rounding to positive zero
Per the language spec clarification in https://golang.org/cl/14727. Updates #12576 Updates #12621 Change-Id: I1e459c3c11a571bd29582761faacaa9ca3178ba6 Reviewed-on: https://go-review.googlesource.com/91895 Run-TryBot: Ian Lance Taylor <iant@golang.org> Run-TryBot: Robert Griesemer <gri@golang.org> Reviewed-by: Robert Griesemer <gri@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
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committed by
Brad Fitzpatrick
parent
9916feeddf
commit
d9fc1929e9
20
test/fixedbugs/issue12621.go
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20
test/fixedbugs/issue12621.go
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@ -0,0 +1,20 @@
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// 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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// Issues 12576 and 12621: Negative untyped floating point constants
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// with small magnitude round to 0, not negative zero.
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package main
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import "math"
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var m = -1e-10000
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func main() {
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if math.Signbit(m) {
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panic(m)
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}
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}
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