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Add some __builtin_expect to generic __ieee754_log

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Ulrich Drepper 2011-10-21 12:28:42 -04:00
parent 1a97a8c78f
commit 8ec250a484
2 changed files with 8 additions and 3 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2011-10-21 Ulrich Drepper <drepper@gmail.com>
* sysdeps/ieee754/dbl-64/e_log.c (__ieee754_log): Add a few more
__builtin_expect.
2011-10-20 Ulrich Drepper <drepper@gmail.com>
* sysdeps/i386/configure.in: Test for -mfma4 option.

6
sysdeps/ieee754/dbl-64/e_log.c
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@ -1,7 +1,7 @@
/*
* IBM Accurate Mathematical Library
* written by International Business Machines Corp.
* Copyright (C) 2001 Free Software Foundation
* Copyright (C) 2001, 2011 Free Software Foundation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
@ -68,7 +68,7 @@ double __ieee754_log(double x) {
num.d = x; ux = num.i[HIGH_HALF]; dx = num.i[LOW_HALF];
n=0;
if (ux < 0x00100000) {
if (__builtin_expect(ux < 0x00100000, 0)) {
if (__builtin_expect(((ux & 0x7fffffff) | dx) == 0, 0))
return MHALF/ZERO; /* return -INF */
if (__builtin_expect(ux < 0, 0))
@ -82,7 +82,7 @@ double __ieee754_log(double x) {
/* Regular values of x */
w = x-ONE;
if (ABS(w) > U03) { goto case_03; }
if (__builtin_expect(ABS(w) > U03, 1)) { goto case_03; }
/*--- Stage I, the case abs(x-1) < 0.03 */