2016-03-01 15:57:46 -07:00
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// Copyright 2010 The Go Authors. All rights reserved.
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2010-07-12 12:30:11 -06:00
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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2014-08-12 18:04:45 -06:00
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#include "textflag.h"
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2010-07-12 12:30:11 -06:00
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// func Log10(x float64) float64
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TEXT ·Log10(SB),NOSPLIT,$0
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FLDLG2 // F0=log10(2)
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FMOVD x+0(FP), F0 // F0=x, F1=log10(2)
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FYL2X // F0=log10(x)=log2(x)*log10(2)
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2013-03-22 10:57:55 -06:00
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FMOVDP F0, ret+8(FP)
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RET
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// func Log2(x float64) float64
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TEXT ·Log2(SB),NOSPLIT,$0
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FLD1 // F0=1
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FMOVD x+0(FP), F0 // F0=x, F1=1
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FYL2X // F0=log2(x)
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FMOVDP F0, ret+8(FP)
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RET
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