1 files changed, 79 insertions, 0 deletions
diff --git a/src/cmd/compile/internal/ppc64/ggen.go b/src/cmd/compile/internal/ppc64/ggen.go
new file mode 100644
index 0000000..a5a772b
--- /dev/null
+++ b/src/cmd/compile/internal/ppc64/ggen.go
@@ -0,0 +1,79 @@
+// 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 ppc64
+
+import (
+	"cmd/compile/internal/gc"
+	"cmd/internal/obj"
+	"cmd/internal/obj/ppc64"
+)
+
+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, ppc64.AMOVD, obj.TYPE_REG, ppc64.REGZERO, 0, obj.TYPE_MEM, ppc64.REGSP, gc.Ctxt.FixedFrameSize()+off+i)
+		}
+	} else if cnt <= int64(128*gc.Widthptr) {
+		p = pp.Appendpp(p, ppc64.AADD, obj.TYPE_CONST, 0, gc.Ctxt.FixedFrameSize()+off-8, obj.TYPE_REG, ppc64.REGRT1, 0)
+		p.Reg = ppc64.REGSP
+		p = pp.Appendpp(p, obj.ADUFFZERO, obj.TYPE_NONE, 0, 0, obj.TYPE_MEM, 0, 0)
+		p.To.Name = obj.NAME_EXTERN
+		p.To.Sym = gc.Duffzero
+		p.To.Offset = 4 * (128 - cnt/int64(gc.Widthptr))
+	} else {
+		p = pp.Appendpp(p, ppc64.AMOVD, obj.TYPE_CONST, 0, gc.Ctxt.FixedFrameSize()+off-8, obj.TYPE_REG, ppc64.REGTMP, 0)
+		p = pp.Appendpp(p, ppc64.AADD, obj.TYPE_REG, ppc64.REGTMP, 0, obj.TYPE_REG, ppc64.REGRT1, 0)
+		p.Reg = ppc64.REGSP
+		p = pp.Appendpp(p, ppc64.AMOVD, obj.TYPE_CONST, 0, cnt, obj.TYPE_REG, ppc64.REGTMP, 0)
+		p = pp.Appendpp(p, ppc64.AADD, obj.TYPE_REG, ppc64.REGTMP, 0, obj.TYPE_REG, ppc64.REGRT2, 0)
+		p.Reg = ppc64.REGRT1
+		p = pp.Appendpp(p, ppc64.AMOVDU, obj.TYPE_REG, ppc64.REGZERO, 0, obj.TYPE_MEM, ppc64.REGRT1, int64(gc.Widthptr))
+		p1 := p
+		p = pp.Appendpp(p, ppc64.ACMP, obj.TYPE_REG, ppc64.REGRT1, 0, obj.TYPE_REG, ppc64.REGRT2, 0)
+		p = pp.Appendpp(p, ppc64.ABNE, obj.TYPE_NONE, 0, 0, obj.TYPE_BRANCH, 0, 0)
+		gc.Patch(p, p1)
+	}
+
+	return p
+}
+
+func ginsnop(pp *gc.Progs) *obj.Prog {
+	p := pp.Prog(ppc64.AOR)
+	p.From.Type = obj.TYPE_REG
+	p.From.Reg = ppc64.REG_R0
+	p.To.Type = obj.TYPE_REG
+	p.To.Reg = ppc64.REG_R0
+	return p
+}
+
+func ginsnopdefer(pp *gc.Progs) *obj.Prog {
+	// On PPC64 two nops are required in the defer case.
+	//
+	// (see gc/cgen.go, gc/plive.go -- copy of comment below)
+	//
+	// On ppc64, when compiling Go into position
+	// independent code on ppc64le we insert an
+	// instruction to reload the TOC pointer from the
+	// stack as well. See the long comment near
+	// jmpdefer in runtime/asm_ppc64.s for why.
+	// If the MOVD is not needed, insert a hardware NOP
+	// so that the same number of instructions are used
+	// on ppc64 in both shared and non-shared modes.
+
+	ginsnop(pp)
+	if gc.Ctxt.Flag_shared {
+		p := pp.Prog(ppc64.AMOVD)
+		p.From.Type = obj.TYPE_MEM
+		p.From.Offset = 24
+		p.From.Reg = ppc64.REGSP
+		p.To.Type = obj.TYPE_REG
+		p.To.Reg = ppc64.REG_R2
+		return p
+	}
+	return ginsnop(pp)
+}