mirror of
https://github.com/golang/go
synced 2024-11-25 12:27:57 -07:00
daa64ddfe6
We were failing ^uint16(0xffff) == 0, as we computed 0xffff0000 instead. I could only trigger a failure for the above case, the other two tests ^uint16(0xfffe) == 1 and -uint16(0xffff) == 1 didn't seem to fail previously. Somehow they get MOVHUs inserted for other reasons (used by CMP instead of TST?). I fixed OMINUS anyway, better safe than sorry. Fixes #9604 Change-Id: I4c2d5bdc667742873ac029fdbe3db0cf12893c27 Reviewed-on: https://go-review.googlesource.com/2940 Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org> Reviewed-by: Minux Ma <minux@golang.org>
30 lines
631 B
Go
30 lines
631 B
Go
// run
|
|
|
|
// Copyright 2015 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.
|
|
|
|
package main
|
|
|
|
var x uint16 = 0xffff
|
|
var y uint16 = 0xfffe
|
|
var a uint16 = 0x7000
|
|
var b uint16 = 0x9000
|
|
|
|
func main() {
|
|
// Make sure we truncate to smaller-width types after evaluating expressions.
|
|
// This is a problem for arm where there is no 16-bit comparison op.
|
|
if ^x != 0 {
|
|
panic("^uint16(0xffff) != 0")
|
|
}
|
|
if ^y != 1 {
|
|
panic("^uint16(0xfffe) != 1")
|
|
}
|
|
if -x != 1 {
|
|
panic("-uint16(0xffff) != 1")
|
|
}
|
|
if a+b != 0 {
|
|
panic("0x7000+0x9000 != 0")
|
|
}
|
|
}
|