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| author | bde <bde@FreeBSD.org> | 1997-02-15 05:21:16 +0000 |
|---|---|---|
| committer | bde <bde@FreeBSD.org> | 1997-02-15 05:21:16 +0000 |
| commit | 1dd609a3d1987733a003885713fff603b5b3755e (patch) | |
| tree | 27e60b60dffb76ccd1e7b4380c0f0d768fe40273 /lib/msun | |
| parent | c5326ece55d2efa64cd844f653754e81972de0ec (diff) | |
| download | FreeBSD-src-1dd609a3d1987733a003885713fff603b5b3755e.zip FreeBSD-src-1dd609a3d1987733a003885713fff603b5b3755e.tar.gz | |
Disabled the i387 version if log1p(). It just evaluates log(1 + x).
This defeats the point of log1p(). ucbtest reports errors of +-5e+15
ULPs. A correct version would use the i387 fyl2xp1 instruction for
small x and maybe scale to small x. The C version does the scaling
reasonably efficiently, and fyl2px1 is slow (at least on P5s), so not
much is lost by always using the C version (only 25% for small x even
with the broken i387 version; 50% for large x).
Diffstat (limited to 'lib/msun')
| -rw-r--r-- | lib/msun/Makefile | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/lib/msun/Makefile b/lib/msun/Makefile index 9dca94a..ceda3ff 100644 --- a/lib/msun/Makefile +++ b/lib/msun/Makefile @@ -46,9 +46,11 @@ .PATH: ${.CURDIR}/i387 ARCH_SRCS = e_acos.S e_asin.S e_atan2.S e_exp.S e_fmod.S e_log.S e_log10.S \ e_remainder.S e_scalb.S e_sqrt.S s_atan.S s_ceil.S s_copysign.S \ - s_cos.S s_finite.S s_floor.S s_ilogb.S s_log1p.S s_logb.S \ + s_cos.S s_finite.S s_floor.S s_ilogb.S s_logb.S \ s_rint.S s_scalbn.S s_significand.S s_sin.S s_tan.S -.endif + +# Broken +# ARCH_SRCS+= s_log1p.S .PATH: ${.CURDIR}/man .PATH: ${.CURDIR}/src |
