| // 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 |
| } |