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// 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 ppc64
import (
"cmd/compile/internal/base"
"cmd/compile/internal/ir"
"cmd/compile/internal/objw"
"cmd/compile/internal/types"
"cmd/internal/obj"
"cmd/internal/obj/ppc64"
)
func zerorange(pp *objw.Progs, p *obj.Prog, off, cnt int64, _ *uint32) *obj.Prog {
if cnt == 0 {
return p
}
if cnt < int64(4*types.PtrSize) {
for i := int64(0); i < cnt; i += int64(types.PtrSize) {
p = pp.Append(p, ppc64.AMOVD, obj.TYPE_REG, ppc64.REGZERO, 0, obj.TYPE_MEM, ppc64.REGSP, base.Ctxt.Arch.FixedFrameSize+off+i)
}
} else if cnt <= int64(128*types.PtrSize) {
p = pp.Append(p, ppc64.AADD, obj.TYPE_CONST, 0, base.Ctxt.Arch.FixedFrameSize+off-8, obj.TYPE_REG, ppc64.REGRT1, 0)
p.Reg = ppc64.REGSP
p = pp.Append(p, obj.ADUFFZERO, obj.TYPE_NONE, 0, 0, obj.TYPE_MEM, 0, 0)
p.To.Name = obj.NAME_EXTERN
p.To.Sym = ir.Syms.Duffzero
p.To.Offset = 4 * (128 - cnt/int64(types.PtrSize))
} else {
p = pp.Append(p, ppc64.AMOVD, obj.TYPE_CONST, 0, base.Ctxt.Arch.FixedFrameSize+off-8, obj.TYPE_REG, ppc64.REGTMP, 0)
p = pp.Append(p, ppc64.AADD, obj.TYPE_REG, ppc64.REGTMP, 0, obj.TYPE_REG, ppc64.REGRT1, 0)
p.Reg = ppc64.REGSP
p = pp.Append(p, ppc64.AMOVD, obj.TYPE_CONST, 0, cnt, obj.TYPE_REG, ppc64.REGTMP, 0)
p = pp.Append(p, ppc64.AADD, obj.TYPE_REG, ppc64.REGTMP, 0, obj.TYPE_REG, ppc64.REGRT2, 0)
p.Reg = ppc64.REGRT1
p = pp.Append(p, ppc64.AMOVDU, obj.TYPE_REG, ppc64.REGZERO, 0, obj.TYPE_MEM, ppc64.REGRT1, int64(types.PtrSize))
p1 := p
p = pp.Append(p, ppc64.ACMP, obj.TYPE_REG, ppc64.REGRT1, 0, obj.TYPE_REG, ppc64.REGRT2, 0)
p = pp.Append(p, ppc64.ABNE, obj.TYPE_NONE, 0, 0, obj.TYPE_BRANCH, 0, 0)
p.To.SetTarget(p1)
}
return p
}
func ginsnop(pp *objw.Progs) *obj.Prog {
// Generate the preferred hardware nop: ori 0,0,0
p := pp.Prog(ppc64.AOR)
p.From = obj.Addr{Type: obj.TYPE_CONST, Offset: 0}
p.To = obj.Addr{Type: obj.TYPE_REG, Reg: ppc64.REG_R0}
return p
}
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