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Check for cbrtf() and provide fallback 

(cherry picked from commit bfb37d7db1c6394099f6b177e10d6e769e678f6a)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Mans Rullgard 2010-07-07 00:27:52 +01:00 committed by Michael Niedermayer
parent 9c48a7cc52
commit ab2539708a
2 changed files with 7 additions and 0 deletions
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2
configure vendored
View File

@ -1125,6 +1125,7 @@ HAVE_LIST="
attribute_may_alias
attribute_packed
bswap
cbrtf
closesocket
cmov
dcbzl
@ -2999,6 +3000,7 @@ check_lib math.h sin -lm && LIBM="-lm"
disabled crystalhd || check_lib libcrystalhd/libcrystalhd_if.h DtsCrystalHDVersion -lcrystalhd || disable crystalhd
enabled vaapi && require vaapi va/va.h vaInitialize -lva
check_mathfunc cbrtf
check_mathfunc exp2
check_mathfunc exp2f
check_mathfunc llrint

5
libavutil/libm.h
View File

@ -28,6 +28,11 @@
#include "config.h"
#include "attributes.h"
#if !HAVE_CBRTF
#undef cbrtf
#define cbrtf(x) powf(x, 1.0/3.0)
#endif /* HAVE_CBRTF */
#if !HAVE_EXP2
#undef exp2
#define exp2(x) exp((x) * 0.693147180559945)