From 86b119f7659d948de8471f0dc4bd9e1c0a4a12b0 Mon Sep 17 00:00:00 2001
From: Russ Cox <rsc@golang.org>
Date: Thu, 24 Sep 2009 14:27:52 -0700
Subject: [PATCH] install assembly math.Sqrt on amd64

R=r
DELTA=33  (32 added, 0 deleted, 1 changed)
OCL=34983
CL=34986
---
 src/pkg/math/Makefile     | 16 +++++++++++++++-
 src/pkg/math/sqrt_amd64.s | 10 ++++++++++
 src/pkg/math/sqrt_decl.go |  8 ++++++++
 3 files changed, 33 insertions(+), 1 deletion(-)
 create mode 100644 src/pkg/math/sqrt_amd64.s
 create mode 100644 src/pkg/math/sqrt_decl.go

diff --git a/src/pkg/math/Makefile b/src/pkg/math/Makefile
index f062a7468b..bf8d99a608 100644
--- a/src/pkg/math/Makefile
+++ b/src/pkg/math/Makefile
@@ -5,7 +5,14 @@
 include $(GOROOT)/src/Make.$(GOARCH)
 
 TARG=math
-GOFILES=\
+
+OFILES_amd64=\
+	sqrt_amd64.$O\
+
+OFILES=\
+	$(OFILES_$(GOARCH))
+
+ALLGOFILES=\
 	asin.go\
 	atan.go\
 	atan2.go\
@@ -25,4 +32,11 @@ GOFILES=\
 	tan.go\
 	tanh.go\
 
+NOGOFILES=\
+	$(subst _$(GOARCH).$O,.go,$(OFILES_$(GOARCH)))
+
+GOFILES=\
+	$(filter-out $(NOGOFILES),$(ALLGOFILES))\
+	$(subst .go,_decl.go,$(NOGOFILES))\
+
 include $(GOROOT)/src/Make.pkg
diff --git a/src/pkg/math/sqrt_amd64.s b/src/pkg/math/sqrt_amd64.s
new file mode 100644
index 0000000000..5972fafe8e
--- /dev/null
+++ b/src/pkg/math/sqrt_amd64.s
@@ -0,0 +1,10 @@
+// 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.
+
+// func Sqrt(x float64) float64
+TEXT math·Sqrt(SB),7,$0
+	MOVSD x+0(FP), X0
+	SQRTSD X0, X0
+	MOVSD X0, r+8(FP)
+	RET
diff --git a/src/pkg/math/sqrt_decl.go b/src/pkg/math/sqrt_decl.go
new file mode 100644
index 0000000000..4e9112d268
--- /dev/null
+++ b/src/pkg/math/sqrt_decl.go
@@ -0,0 +1,8 @@
+// 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 math
+
+func Sqrt(x float64) float64
+
-- 
2.48.1