From: Lynn Boger <laboger@linux.vnet.ibm.com>
Date: Tue, 17 Aug 2021 18:38:41 +0000 (-0500)
Subject: internal/abi: define PPC64 register ABI constants
X-Git-Tag: go1.18beta1~1274
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=9cbdc1d48f75188f6816259e5f6cbd9ae8458bf9;p=gostls13.git

internal/abi: define PPC64 register ABI constants

Add the PPC64 register ABI constants, and allow
GOEXPERIMENT regabi values to be set for PPC64.

Change-Id: I1c9562ae6669c604db69a7b8ad935d1bc117c899
Reviewed-on: https://go-review.googlesource.com/c/go/+/343870
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Trust: Lynn Boger <laboger@linux.vnet.ibm.com>
---

diff --git a/src/internal/abi/abi_ppc64x.go b/src/internal/abi/abi_ppc64x.go
new file mode 100644
index 0000000000..e38653224a
--- /dev/null
+++ b/src/internal/abi/abi_ppc64x.go
@@ -0,0 +1,21 @@
+// Copyright 2021 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.
+
+//go:build goexperiment.regabireflect && (ppc64 || ppc64le)
+// +build goexperiment.regabireflect
+// +build ppc64 ppc64le
+
+package abi
+
+const (
+	// See abi_generic.go.
+
+	// R3 - R10, R14 - R17.
+	IntArgRegs = 12
+
+	// F1 - F12.
+	FloatArgRegs = 12
+
+	EffectiveFloatRegSize = 8
+)
diff --git a/src/internal/buildcfg/exp.go b/src/internal/buildcfg/exp.go
index 3844e4f021..7cbe4c804d 100644
--- a/src/internal/buildcfg/exp.go
+++ b/src/internal/buildcfg/exp.go
@@ -111,8 +111,8 @@ func ParseGOEXPERIMENT(goos, goarch, goexp string) (flags, baseline goexperiment
 		flags.RegabiReflect = true
 		flags.RegabiArgs = true
 	}
-	// regabi is only supported on amd64 and arm64.
-	if goarch != "amd64" && goarch != "arm64" {
+	// regabi is only supported on amd64, arm64, ppc64 and ppc64le.
+	if goarch != "amd64" && goarch != "arm64" && goarch != "ppc64le" && goarch != "ppc64" {
 		flags.RegabiReflect = false
 		flags.RegabiArgs = false
 	}