1 // run 2 3 // Copyright 2015 The Go Authors. All rights reserved. 4 // Use of this source code is governed by a BSD-style 5 // license that can be found in the LICENSE file. 6 7 // Issue 11987. The ppc64 SRADCC instruction was misassembled in a way 8 // lost bit 5 of the immediate so v>>32 was assembled as v>>0. SRADCC 9 // is only ever inserted by peep so it's hard to be sure when it will 10 // be used. This formulation worked when the bug was fixed. 11 12 package main 13 14 import "fmt" 15 16 var v int64 = 0x80000000 17 18 func main() { 19 s := fmt.Sprintf("%v", v>>32 == 0) 20 if s != "true" { 21 fmt.Printf("BUG: v>>32 == 0 evaluated as %q\n", s) 22 } 23 } 24
