blas: imported blas as a subtree

blas/native/internal/math32/sqrt.go

@@ -0,0 +1,25 @@
+// Copyright ©2015 The gonum Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//+build !amd64 noasm appengine
+
+package math32
+
+import (
+	"math"
+)
+
+// Sqrt returns the square root of x.
+//
+// Special cases are:
+//	Sqrt(+Inf) = +Inf
+//	Sqrt(±0) = ±0
+//	Sqrt(x < 0) = NaN
+//	Sqrt(NaN) = NaN
+func Sqrt(x float32) float32 {
+	// FIXME(kortschak): Direct translation of the math package
+	// asm code for 386 fails to build. No test hardware is available
+	// for arm, so using conversion instead.
+	return float32(math.Sqrt(float64(x)))
+}