mirror of
https://github.com/golang/go
synced 2024-11-20 00:34:43 -07:00
44 lines
1.3 KiB
Go
44 lines
1.3 KiB
Go
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// run
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// Check conversion of constant to float32/float64 near min/max boundaries.
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// Copyright 2014 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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package main
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import (
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"fmt"
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)
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var cvt = []struct {
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val interface{}
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binary string
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}{
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{float32(-340282356779733661637539395458142568447), "-16777215p+104"},
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{float32(-340282326356119256160033759537265639424), "-16777214p+104"},
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{float32(340282326356119256160033759537265639424), "16777214p+104"},
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{float32(340282356779733661637539395458142568447), "16777215p+104"},
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{float64(-1.797693134862315807937289714053e+308), "-9007199254740991p+971"},
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{float64(-1.797693134862315708145274237317e+308), "-9007199254740991p+971"},
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{float64(-1.797693134862315608353258760581e+308), "-9007199254740990p+971"},
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{float64(1.797693134862315608353258760581e+308), "9007199254740990p+971"},
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{float64(1.797693134862315708145274237317e+308), "9007199254740991p+971"},
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{float64(1.797693134862315807937289714053e+308), "9007199254740991p+971"},
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}
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func main() {
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bug := false
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for i, c := range cvt {
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s := fmt.Sprintf("%b", c.val)
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if s != c.binary {
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if !bug {
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bug = true
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fmt.Println("BUG")
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}
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fmt.Printf("#%d: have %s, want %s\n", i, s, c.binary)
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}
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}
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}
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