// Copyright 2016 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 mips import ( "cmd/compile/internal/base" "cmd/compile/internal/objw" "cmd/compile/internal/types" "cmd/internal/obj" "cmd/internal/obj/mips" ) // TODO(mips): implement DUFFZERO 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, mips.AMOVW, obj.TYPE_REG, mips.REGZERO, 0, obj.TYPE_MEM, mips.REGSP, base.Ctxt.Arch.FixedFrameSize+off+i) } } else { //fmt.Printf("zerorange frame:%v, lo: %v, hi:%v \n", frame ,lo, hi) // ADD $(FIXED_FRAME+frame+lo-4), SP, r1 // ADD $cnt, r1, r2 // loop: // MOVW R0, (Widthptr)r1 // ADD $Widthptr, r1 // BNE r1, r2, loop p = pp.Append(p, mips.AADD, obj.TYPE_CONST, 0, base.Ctxt.Arch.FixedFrameSize+off-4, obj.TYPE_REG, mips.REGRT1, 0) p.Reg = mips.REGSP p = pp.Append(p, mips.AADD, obj.TYPE_CONST, 0, cnt, obj.TYPE_REG, mips.REGRT2, 0) p.Reg = mips.REGRT1 p = pp.Append(p, mips.AMOVW, obj.TYPE_REG, mips.REGZERO, 0, obj.TYPE_MEM, mips.REGRT1, int64(types.PtrSize)) p1 := p p = pp.Append(p, mips.AADD, obj.TYPE_CONST, 0, int64(types.PtrSize), obj.TYPE_REG, mips.REGRT1, 0) p = pp.Append(p, mips.ABNE, obj.TYPE_REG, mips.REGRT1, 0, obj.TYPE_BRANCH, 0, 0) p.Reg = mips.REGRT2 p.To.SetTarget(p1) } return p } func ginsnop(pp *objw.Progs) *obj.Prog { p := pp.Prog(mips.ANOOP) return p }