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| author | Ulrich Drepper <drepper@gmail.com> | 2011-10-15 20:22:59 -0400 |
|---|---|---|
| committer | Ulrich Drepper <drepper@gmail.com> | 2011-10-15 20:22:59 -0400 |
| commit | bcf01e6d800e837622ddbc851b42b55fa99e5636 (patch) | |
| tree | 5df0ae9971331105fe53de872895abb68d8276a5 /sysdeps/ieee754/flt-32/e_expf.c | |
| parent | ba1a0d5938b53454a249d679ab90baf541cd91ad (diff) | |
| download | glibc-bcf01e6d800e837622ddbc851b42b55fa99e5636.tar.gz glibc-bcf01e6d800e837622ddbc851b42b55fa99e5636.tar.xz glibc-bcf01e6d800e837622ddbc851b42b55fa99e5636.zip | |
Optimize exp
Add __exp*_finite optimizations and rewrite some wrappers.
Diffstat (limited to 'sysdeps/ieee754/flt-32/e_expf.c')
| -rw-r--r-- | sysdeps/ieee754/flt-32/e_expf.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/sysdeps/ieee754/flt-32/e_expf.c b/sysdeps/ieee754/flt-32/e_expf.c index b9cd53c033..872d34bc5b 100644 --- a/sysdeps/ieee754/flt-32/e_expf.c +++ b/sysdeps/ieee754/flt-32/e_expf.c @@ -1,5 +1,5 @@ /* Single-precision floating point e^x. - Copyright (C) 1997, 1998, 2005, 2006 Free Software Foundation, Inc. + Copyright (C) 1997, 1998, 2005, 2006, 2011 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Geoffrey Keating <geoffk@ozemail.com.au> @@ -33,8 +33,8 @@ Then e^x is approximated as e^x = 2^n ( e^(t/512 + delta[t]) - + ( e^(t/512 + delta[t]) - * ( p(x + delta[t] + n * ln(2)) - delta ) ) ) + + ( e^(t/512 + delta[t]) + * ( p(x + delta[t] + n * ln(2)) - delta ) ) ) where - p(x) is a polynomial approximating e(x)-1; @@ -138,3 +138,4 @@ __ieee754_expf (float x) /* Return x, if x is a NaN or Inf; or overflow, otherwise. */ return TWO127*x; } +strong_alias (__ieee754_expf, __expf_finite) |