math: add sqrt_arm.s and sqrtGoC.go as fallback to soft fp emulation
5a: add SQRTF and SQRTD
5l: add ASQRTF and ASQRTD
Use ARMv7 VFP VSQRT instruction to speed up math.Sqrt
R=rsc, dave, m
CC=golang-dev
https://golang.org/cl/4551082
diff --git a/src/pkg/math/sqrt_arm.s b/src/pkg/math/sqrt_arm.s
new file mode 100644
index 0000000..befbb8a
--- /dev/null
+++ b/src/pkg/math/sqrt_arm.s
@@ -0,0 +1,10 @@
+// Copyright 2011 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 ·Sqrt(SB),7,$0
+ MOVD x+0(FP),F0
+ SQRTD F0,F0
+ MOVD F0,r+8(FP)
+ RET
