1 // Copyright 2010 The Go 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 #include "textflag.h" 6 7 // func Log10(x float64) float64 8 TEXT Log10(SB),NOSPLIT,$0 9 FLDLG2 // F0=log10(2) 10 FMOVD x+0(FP), F0 // F0=x, F1=log10(2) 11 FYL2X // F0=log10(x)=log2(x)*log10(2) 12 FMOVDP F0, ret+8(FP) 13 RET 14 15 // func Log2(x float64) float64 16 TEXT Log2(SB),NOSPLIT,$0 17 FLD1 // F0=1 18 FMOVD x+0(FP), F0 // F0=x, F1=1 19 FYL2X // F0=log2(x) 20 FMOVDP F0, ret+8(FP) 21 RET 22
