gcc/libgo/go/math/log10.go
Ian Lance Taylor a64b24bdef re PR go/51874 (Many libgo testsuite failures on IRIX)
PR go/51874
math: Don't use libc log2 and trunc functions.

From-SVN: r184300
2012-02-16 07:17:03 +00:00

31 lines
635 B
Go

// 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
// Log10 returns the decimal logarithm of x.
// The special cases are the same as for Log.
//extern log10
func libc_log10(float64) float64
func Log10(x float64) float64 {
return libc_log10(x)
}
func log10(x float64) float64 {
return Log(x) * (1 / Ln10)
}
// Log2 returns the binary logarithm of x.
// The special cases are the same as for Log.
func Log2(x float64) float64 {
return log2(x)
}
func log2(x float64) float64 {
return Log(x) * (1 / Ln2)
}