Adding upstream version 1.20.14.upstream/1.20.14upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 50 insertions, 0 deletions

diff --git a/src/cmd/compile/internal/x86/ggen.go b/src/cmd/compile/internal/x86/ggen.go
new file mode 100644
index 0000000..3ca4797
--- /dev/null
+++ b/src/cmd/compile/internal/x86/ggen.go
@@ -0,0 +1,50 @@
+// 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 x86
+
+import (
+	"cmd/compile/internal/ir"
+	"cmd/compile/internal/objw"
+	"cmd/compile/internal/types"
+	"cmd/internal/obj"
+	"cmd/internal/obj/x86"
+)
+
+func zerorange(pp *objw.Progs, p *obj.Prog, off, cnt int64, ax *uint32) *obj.Prog {
+	if cnt == 0 {
+		return p
+	}
+	if *ax == 0 {
+		p = pp.Append(p, x86.AMOVL, obj.TYPE_CONST, 0, 0, obj.TYPE_REG, x86.REG_AX, 0)
+		*ax = 1
+	}
+
+	if cnt <= int64(4*types.RegSize) {
+		for i := int64(0); i < cnt; i += int64(types.RegSize) {
+			p = pp.Append(p, x86.AMOVL, obj.TYPE_REG, x86.REG_AX, 0, obj.TYPE_MEM, x86.REG_SP, off+i)
+		}
+	} else if cnt <= int64(128*types.RegSize) {
+		p = pp.Append(p, x86.ALEAL, obj.TYPE_MEM, x86.REG_SP, off, obj.TYPE_REG, x86.REG_DI, 0)
+		p = pp.Append(p, obj.ADUFFZERO, obj.TYPE_NONE, 0, 0, obj.TYPE_ADDR, 0, 1*(128-cnt/int64(types.RegSize)))
+		p.To.Sym = ir.Syms.Duffzero
+	} else {
+		p = pp.Append(p, x86.AMOVL, obj.TYPE_CONST, 0, cnt/int64(types.RegSize), obj.TYPE_REG, x86.REG_CX, 0)
+		p = pp.Append(p, x86.ALEAL, obj.TYPE_MEM, x86.REG_SP, off, obj.TYPE_REG, x86.REG_DI, 0)
+		p = pp.Append(p, x86.AREP, obj.TYPE_NONE, 0, 0, obj.TYPE_NONE, 0, 0)
+		p = pp.Append(p, x86.ASTOSL, obj.TYPE_NONE, 0, 0, obj.TYPE_NONE, 0, 0)
+	}
+
+	return p
+}
+
+func ginsnop(pp *objw.Progs) *obj.Prog {
+	// See comment in ../amd64/ggen.go.
+	p := pp.Prog(x86.AXCHGL)
+	p.From.Type = obj.TYPE_REG
+	p.From.Reg = x86.REG_AX
+	p.To.Type = obj.TYPE_REG
+	p.To.Reg = x86.REG_AX
+	return p
+}