mirror of
https://github.com/golang/go.git
synced 2025-12-08 06:10:04 +00:00
503bccb5d9
ZeroAuto was used with the ambiguously live logic. The ambiguously live logic is removed as we switched to stack objects. It is now never called. Remove. Change-Id: If4cdd7fed5297f8ab591cc392a76c80f57820856 Reviewed-on: https://go-review.googlesource.com/c/go/+/203538 Run-TryBot: Cherry Zhang <cherryyz@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
58 lines
1.7 KiB
Go
58 lines
1.7 KiB
Go
// Copyright 2009 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 arm
|
|
|
|
import (
|
|
"cmd/compile/internal/gc"
|
|
"cmd/internal/obj"
|
|
"cmd/internal/obj/arm"
|
|
)
|
|
|
|
func zerorange(pp *gc.Progs, p *obj.Prog, off, cnt int64, r0 *uint32) *obj.Prog {
|
|
if cnt == 0 {
|
|
return p
|
|
}
|
|
if *r0 == 0 {
|
|
p = pp.Appendpp(p, arm.AMOVW, obj.TYPE_CONST, 0, 0, obj.TYPE_REG, arm.REG_R0, 0)
|
|
*r0 = 1
|
|
}
|
|
|
|
if cnt < int64(4*gc.Widthptr) {
|
|
for i := int64(0); i < cnt; i += int64(gc.Widthptr) {
|
|
p = pp.Appendpp(p, arm.AMOVW, obj.TYPE_REG, arm.REG_R0, 0, obj.TYPE_MEM, arm.REGSP, 4+off+i)
|
|
}
|
|
} else if cnt <= int64(128*gc.Widthptr) {
|
|
p = pp.Appendpp(p, arm.AADD, obj.TYPE_CONST, 0, 4+off, obj.TYPE_REG, arm.REG_R1, 0)
|
|
p.Reg = arm.REGSP
|
|
p = pp.Appendpp(p, obj.ADUFFZERO, obj.TYPE_NONE, 0, 0, obj.TYPE_MEM, 0, 0)
|
|
p.To.Name = obj.NAME_EXTERN
|
|
p.To.Sym = gc.Duffzero
|
|
p.To.Offset = 4 * (128 - cnt/int64(gc.Widthptr))
|
|
} else {
|
|
p = pp.Appendpp(p, arm.AADD, obj.TYPE_CONST, 0, 4+off, obj.TYPE_REG, arm.REG_R1, 0)
|
|
p.Reg = arm.REGSP
|
|
p = pp.Appendpp(p, arm.AADD, obj.TYPE_CONST, 0, cnt, obj.TYPE_REG, arm.REG_R2, 0)
|
|
p.Reg = arm.REG_R1
|
|
p = pp.Appendpp(p, arm.AMOVW, obj.TYPE_REG, arm.REG_R0, 0, obj.TYPE_MEM, arm.REG_R1, 4)
|
|
p1 := p
|
|
p.Scond |= arm.C_PBIT
|
|
p = pp.Appendpp(p, arm.ACMP, obj.TYPE_REG, arm.REG_R1, 0, obj.TYPE_NONE, 0, 0)
|
|
p.Reg = arm.REG_R2
|
|
p = pp.Appendpp(p, arm.ABNE, obj.TYPE_NONE, 0, 0, obj.TYPE_BRANCH, 0, 0)
|
|
gc.Patch(p, p1)
|
|
}
|
|
|
|
return p
|
|
}
|
|
|
|
func ginsnop(pp *gc.Progs) *obj.Prog {
|
|
p := pp.Prog(arm.AAND)
|
|
p.From.Type = obj.TYPE_REG
|
|
p.From.Reg = arm.REG_R0
|
|
p.To.Type = obj.TYPE_REG
|
|
p.To.Reg = arm.REG_R0
|
|
p.Scond = arm.C_SCOND_EQ
|
|
return p
|
|
}
|