diff options
Diffstat (limited to 'src/cmd/compile/internal/mips64/ggen.go')
-rw-r--r-- | src/cmd/compile/internal/mips64/ggen.go | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/src/cmd/compile/internal/mips64/ggen.go b/src/cmd/compile/internal/mips64/ggen.go new file mode 100644 index 0000000..37bb871 --- /dev/null +++ b/src/cmd/compile/internal/mips64/ggen.go @@ -0,0 +1,59 @@ +// 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 mips64 + +import ( + "cmd/compile/internal/ir" + "cmd/compile/internal/objw" + "cmd/compile/internal/types" + "cmd/internal/obj" + "cmd/internal/obj/mips" +) + +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.AMOVV, obj.TYPE_REG, mips.REGZERO, 0, obj.TYPE_MEM, mips.REGSP, 8+off+i) + } + } else if cnt <= int64(128*types.PtrSize) { + p = pp.Append(p, mips.AADDV, obj.TYPE_CONST, 0, 8+off-8, obj.TYPE_REG, mips.REGRT1, 0) + p.Reg = mips.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 $(8+frame+lo-8), SP, r1 + // ADDV $cnt, r1, r2 + // loop: + // MOVV R0, (Widthptr)r1 + // ADDV $Widthptr, r1 + // BNE r1, r2, loop + p = pp.Append(p, mips.AADDV, obj.TYPE_CONST, 0, 8+off-8, obj.TYPE_REG, mips.REGRT1, 0) + p.Reg = mips.REGSP + p = pp.Append(p, mips.AADDV, obj.TYPE_CONST, 0, cnt, obj.TYPE_REG, mips.REGRT2, 0) + p.Reg = mips.REGRT1 + p = pp.Append(p, mips.AMOVV, obj.TYPE_REG, mips.REGZERO, 0, obj.TYPE_MEM, mips.REGRT1, int64(types.PtrSize)) + p1 := p + p = pp.Append(p, mips.AADDV, 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.ANOR) + p.From.Type = obj.TYPE_REG + p.From.Reg = mips.REG_R0 + p.To.Type = obj.TYPE_REG + p.To.Reg = mips.REG_R0 + return p +} |