mirror of
https://github.com/golang/go
synced 2024-11-05 17:46:16 -07:00
36df358a30
Revision 63f7abcae015 introduced a bug caused by code assuming registers started at X5, not X0. Fixes #4138. R=rsc CC=golang-dev, remy https://golang.org/cl/6558043
40 lines
704 B
Go
40 lines
704 B
Go
// run
|
|
|
|
// Copyright 2012 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.
|
|
|
|
// Issue 4138: bug in floating-point registers numbering.
|
|
// Makes 6g unable to use more than 11 registers.
|
|
|
|
package main
|
|
|
|
func formula() float32 {
|
|
mA := [1]float32{1.0}
|
|
det1 := mA[0]
|
|
det2 := mA[0]
|
|
det3 := mA[0]
|
|
det4 := mA[0]
|
|
det5 := mA[0]
|
|
det6 := mA[0]
|
|
det7 := mA[0]
|
|
det8 := mA[0]
|
|
det9 := mA[0]
|
|
det10 := mA[0]
|
|
det11 := mA[0]
|
|
det12 := mA[0]
|
|
|
|
return det1 + det2*det3 +
|
|
det4*det5 + det6*det7 +
|
|
det8*det9 + det10*det11 +
|
|
det12
|
|
}
|
|
|
|
func main() {
|
|
x := formula()
|
|
if x != 7.0 {
|
|
println(x, 7.0)
|
|
panic("x != 7.0")
|
|
}
|
|
}
|