1 files changed, 53 insertions, 0 deletions
diff --git a/src/cmd/compile/internal/mips/ggen.go b/src/cmd/compile/internal/mips/ggen.go
new file mode 100644
index 0000000..5e86772
--- /dev/null
+++ b/src/cmd/compile/internal/mips/ggen.go
@@ -0,0 +1,53 @@
+// 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/gc"
+	"cmd/internal/obj"
+	"cmd/internal/obj/mips"
+)
+
+// TODO(mips): implement DUFFZERO
+func zerorange(pp *gc.Progs, p *obj.Prog, off, cnt int64, _ *uint32) *obj.Prog {
+
+	if cnt == 0 {
+		return p
+	}
+	if cnt < int64(4*gc.Widthptr) {
+		for i := int64(0); i < cnt; i += int64(gc.Widthptr) {
+			p = pp.Appendpp(p, mips.AMOVW, obj.TYPE_REG, mips.REGZERO, 0, obj.TYPE_MEM, mips.REGSP, gc.Ctxt.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.Appendpp(p, mips.AADD, obj.TYPE_CONST, 0, gc.Ctxt.FixedFrameSize()+off-4, obj.TYPE_REG, mips.REGRT1, 0)
+		p.Reg = mips.REGSP
+		p = pp.Appendpp(p, mips.AADD, obj.TYPE_CONST, 0, cnt, obj.TYPE_REG, mips.REGRT2, 0)
+		p.Reg = mips.REGRT1
+		p = pp.Appendpp(p, mips.AMOVW, obj.TYPE_REG, mips.REGZERO, 0, obj.TYPE_MEM, mips.REGRT1, int64(gc.Widthptr))
+		p1 := p
+		p = pp.Appendpp(p, mips.AADD, obj.TYPE_CONST, 0, int64(gc.Widthptr), obj.TYPE_REG, mips.REGRT1, 0)
+		p = pp.Appendpp(p, mips.ABNE, obj.TYPE_REG, mips.REGRT1, 0, obj.TYPE_BRANCH, 0, 0)
+		p.Reg = mips.REGRT2
+		gc.Patch(p, p1)
+	}
+
+	return p
+}
+
+func ginsnop(pp *gc.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
+}