github.com/jingcheng-WU/gonum@v0.9.1-0.20210323123734-f1a2a11a8f7b/internal/math32/sqrt.go (about)

     1  // Copyright ©2015 The Gonum Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  // +build !amd64,!arm64 noasm gccgo safe
     6  
     7  package math32
     8  
     9  import (
    10  	"math"
    11  )
    12  
    13  // Sqrt returns the square root of x.
    14  //
    15  // Special cases are:
    16  //	Sqrt(+Inf) = +Inf
    17  //	Sqrt(±0) = ±0
    18  //	Sqrt(x < 0) = NaN
    19  //	Sqrt(NaN) = NaN
    20  func Sqrt(x float32) float32 {
    21  	// FIXME(kortschak): Direct translation of the math package
    22  	// asm code for 386 fails to build.
    23  	return float32(math.Sqrt(float64(x)))
    24  }