mirror of
https://github.com/golang/go
synced 2024-09-29 14:24:32 -06:00
646939c0e3
The changes to internal/big are completely automatic by running vendor.bash in that directory. Also added respective test case. For #14553. Change-Id: I98b124bcc9ad9e9bd987943719be27864423cb5d Reviewed-on: https://go-review.googlesource.com/20199 Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
43 lines
867 B
Go
43 lines
867 B
Go
// run
|
|
|
|
// Copyright 2016 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.
|
|
|
|
// This test checks if the compiler's internal constant
|
|
// arithmetic correctly rounds denormal float32 values.
|
|
|
|
package main
|
|
|
|
import (
|
|
"fmt"
|
|
"math"
|
|
)
|
|
|
|
func main() {
|
|
for _, t := range []struct {
|
|
value float32
|
|
bits uint32
|
|
}{
|
|
{0e+00, 0x00000000},
|
|
{1e-45, 0x00000000},
|
|
{2e-45, 0x00000001},
|
|
{3e-45, 0x00000002},
|
|
{4e-45, 0x00000003},
|
|
{5e-45, 0x00000004},
|
|
{6e-45, 0x00000004},
|
|
{7e-45, 0x00000005},
|
|
{8e-45, 0x00000006},
|
|
{9e-45, 0x00000006},
|
|
{1.0e-44, 0x00000007},
|
|
{1.1e-44, 0x00000008},
|
|
{1.2e-44, 0x00000009},
|
|
} {
|
|
got := math.Float32bits(t.value)
|
|
want := t.bits
|
|
if got != want {
|
|
panic(fmt.Sprintf("bits(%g) = 0x%08x; want 0x%08x", t.value, got, want))
|
|
}
|
|
}
|
|
}
|