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| author | Ulrich Drepper <drepper@gmail.com> | 2011-10-12 11:27:51 -0400 |
|---|---|---|
| committer | Ulrich Drepper <drepper@gmail.com> | 2011-10-12 11:27:51 -0400 |
| commit | 0ac5ae2335292908f39031b1ea9fe8edce433c0f (patch) | |
| tree | f9d26c8abc0de39d18d4c13e70f6022cdc6b461f /sysdeps/ieee754/dbl-64/e_pow.c | |
| parent | a843a204a3e8a0dd53584dad3668771abaec84ac (diff) | |
| download | glibc-0ac5ae2335292908f39031b1ea9fe8edce433c0f.tar glibc-0ac5ae2335292908f39031b1ea9fe8edce433c0f.tar.gz glibc-0ac5ae2335292908f39031b1ea9fe8edce433c0f.tar.bz2 glibc-0ac5ae2335292908f39031b1ea9fe8edce433c0f.zip | |
Optimize libm
libm is now somewhat integrated with gcc's -ffinite-math-only option
and lots of the wrapper functions have been optimized.
Diffstat (limited to 'sysdeps/ieee754/dbl-64/e_pow.c')
| -rw-r--r-- | sysdeps/ieee754/dbl-64/e_pow.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/sysdeps/ieee754/dbl-64/e_pow.c b/sysdeps/ieee754/dbl-64/e_pow.c index 1e159f2c0b..83a5eff5c2 100644 --- a/sysdeps/ieee754/dbl-64/e_pow.c +++ b/sysdeps/ieee754/dbl-64/e_pow.c @@ -1,7 +1,7 @@ /* * IBM Accurate Mathematical Library * written by International Business Machines Corp. - * Copyright (C) 2001, 2002, 2004 Free Software Foundation + * Copyright (C) 2001, 2002, 2004, 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 @@ -22,12 +22,12 @@ /* */ /* FUNCTIONS: upow */ /* power1 */ -/* my_log2 */ +/* my_log2 */ /* log1 */ /* checkint */ /* FILES NEEDED: dla.h endian.h mpa.h mydefs.h */ /* halfulp.c mpexp.c mplog.c slowexp.c slowpow.c mpa.c */ -/* uexp.c upow.c */ +/* uexp.c upow.c */ /* root.tbl uexp.tbl upow.tbl */ /* An ultimate power routine. Given two IEEE double machine numbers y,x */ /* it computes the correctly rounded (to nearest) value of x^y. */ @@ -77,7 +77,7 @@ double __ieee754_pow(double x, double y) { /* else */ if(((u.i[HIGH_HALF]>0 && u.i[HIGH_HALF]<0x7ff00000)|| /* x>0 and not x->0 */ (u.i[HIGH_HALF]==0 && u.i[LOW_HALF]!=0)) && - /* 2^-1023< x<= 2^-1023 * 0x1.0000ffffffff */ + /* 2^-1023< x<= 2^-1023 * 0x1.0000ffffffff */ (v.i[HIGH_HALF]&0x7fffffff) < 0x4ff00000) { /* if y<-1 or y>1 */ z = log1(x,&aa,&error); /* x^y =e^(y log (X)) */ t = y*134217729.0; @@ -153,6 +153,7 @@ double __ieee754_pow(double x, double y) { if (y<0) return (x<1.0)?INF.x:0; return 0; /* unreachable, to make the compiler happy */ } +strong_alias (__ieee754_pow, __pow_finite) /**************************************************************************/ /* Computing x^y using more accurate but more slow log routine */ |