| // Copyright 2022 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 loong64 |
| |
| import ( |
| "cmd/compile/internal/base" |
| "cmd/compile/internal/ir" |
| "cmd/compile/internal/objw" |
| "cmd/compile/internal/types" |
| "cmd/internal/obj" |
| "cmd/internal/obj/loong64" |
| ) |
| |
| func zerorange(pp *objw.Progs, p *obj.Prog, off, cnt int64, _ *uint32) *obj.Prog { |
| if cnt == 0 { |
| return p |
| } |
| |
| // Adjust the frame to account for LR. |
| off += base.Ctxt.Arch.FixedFrameSize |
| |
| if cnt < int64(4*types.PtrSize) { |
| for i := int64(0); i < cnt; i += int64(types.PtrSize) { |
| p = pp.Append(p, loong64.AMOVV, obj.TYPE_REG, loong64.REGZERO, 0, obj.TYPE_MEM, loong64.REGSP, off+i) |
| } |
| } else if cnt <= int64(128*types.PtrSize) { |
| p = pp.Append(p, loong64.AADDV, obj.TYPE_CONST, 0, off, obj.TYPE_REG, loong64.REGRT1, 0) |
| p.Reg = loong64.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 = 8 * (128 - cnt/int64(types.PtrSize)) |
| } else { |
| // ADDV $(off), SP, r1 |
| // ADDV $cnt, r1, r2 |
| // loop: |
| // MOVV R0, (r1) |
| // ADDV $Widthptr, r1 |
| // BNE r1, r2, loop |
| p = pp.Append(p, loong64.AADDV, obj.TYPE_CONST, 0, off, obj.TYPE_REG, loong64.REGRT1, 0) |
| p.Reg = loong64.REGSP |
| p = pp.Append(p, loong64.AADDV, obj.TYPE_CONST, 0, cnt, obj.TYPE_REG, loong64.REGRT2, 0) |
| p.Reg = loong64.REGRT1 |
| p = pp.Append(p, loong64.AMOVV, obj.TYPE_REG, loong64.REGZERO, 0, obj.TYPE_MEM, loong64.REGRT1, 0) |
| loop := p |
| p = pp.Append(p, loong64.AADDV, obj.TYPE_CONST, 0, int64(types.PtrSize), obj.TYPE_REG, loong64.REGRT1, 0) |
| p = pp.Append(p, loong64.ABNE, obj.TYPE_REG, loong64.REGRT1, 0, obj.TYPE_BRANCH, 0, 0) |
| p.Reg = loong64.REGRT2 |
| p.To.SetTarget(loop) |
| } |
| |
| return p |
| } |
| |
| func ginsnop(pp *objw.Progs) *obj.Prog { |
| p := pp.Prog(loong64.ANOOP) |
| return p |
| } |