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Diffstat (limited to 'src/math/expm1_386.s')
| -rw-r--r-- | src/math/expm1_386.s | 57 |
1 files changed, 0 insertions, 57 deletions
diff --git a/src/math/expm1_386.s b/src/math/expm1_386.s deleted file mode 100644 index d020296ca7..0000000000 --- a/src/math/expm1_386.s +++ /dev/null @@ -1,57 +0,0 @@ -// Copyright 2010 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. - -#include "textflag.h" - -// func Expm1(x float64) float64 -TEXT ·Expm1(SB),NOSPLIT,$0 - FLDLN2 // F0=log(2) = 1/log2(e) ~ 0.693147 - FMOVD x+0(FP), F0 // F0=x, F1=1/log2(e) - FABS // F0=|x|, F1=1/log2(e) - FUCOMPP F0, F1 // compare F0 to F1 - FSTSW AX - SAHF - JCC use_exp // jump if F0 >= F1 - FLDL2E // F0=log2(e) - FMULD x+0(FP), F0 // F0=x*log2(e) (-1<F0<1) - F2XM1 // F0=e**x-1 = 2**(x*log2(e))-1 - FMOVDP F0, ret+8(FP) - RET -use_exp: -// test bits for not-finite - MOVL x_hi+4(FP), AX - ANDL $0x7ff00000, AX - CMPL AX, $0x7ff00000 - JEQ not_finite - FLDL2E // F0=log2(e) - FMULD x+0(FP), F0 // F0=x*log2(e) - FMOVD F0, F1 // F0=x*log2(e), F1=x*log2(e) - FRNDINT // F0=int(x*log2(e)), F1=x*log2(e) - FSUBD F0, F1 // F0=int(x*log2(e)), F1=x*log2(e)-int(x*log2(e)) - FXCHD F0, F1 // F0=x*log2(e)-int(x*log2(e)), F1=int(x*log2(e)) - F2XM1 // F0=2**(x*log2(e)-int(x*log2(e)))-1, F1=int(x*log2(e)) - FLD1 // F0=1, F1=2**(x*log2(e)-int(x*log2(e)))-1, F2=int(x*log2(e)) - FADDDP F0, F1 // F0=2**(x*log2(e)-int(x*log2(e))), F1=int(x*log2(e)) - FSCALE // F0=e**x, F1=int(x*log2(e)) - FMOVDP F0, F1 // F0=e**x - FLD1 // F0=1, F1=e**x - FSUBDP F0, F1 // F0=e**x-1 - FMOVDP F0, ret+8(FP) - RET -not_finite: -// test bits for -Inf - MOVL x_hi+4(FP), BX - MOVL x_lo+0(FP), CX - CMPL BX, $0xfff00000 - JNE not_neginf - CMPL CX, $0 - JNE not_neginf - FLD1 // F0=1 - FCHS // F0=-1 - FMOVDP F0, ret+8(FP) - RET -not_neginf: - MOVL CX, ret_lo+8(FP) - MOVL BX, ret_hi+12(FP) - RET |