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Set HAVE_FAST_CLZ if CPU has a fast count leading zeros instruction

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Originally committed as revision 21216 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Måns Rullgård 2010-01-14 19:58:09 +00:00
parent 00c081a8f0
commit 669b558330
1 changed files with 9 additions and 0 deletions
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configure vendored
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@ -962,6 +962,7 @@ HAVE_LIST="
exp2 exp2
exp2f exp2f
fast_64bit fast_64bit
fast_clz
fast_cmov fast_cmov
fast_unaligned fast_unaligned
fork fork
@ -1094,6 +1095,8 @@ sse_deps="mmx"
ssse3_deps="sse" ssse3_deps="sse"
vis_deps="sparc" vis_deps="sparc"
fast_clz_if_any="alpha armv5te avr32 mips ppc x86"
need_memalign="altivec neon sse" need_memalign="altivec neon sse"
inline_asm_deps="!tms470" inline_asm_deps="!tms470"
@ -2312,6 +2315,12 @@ EOF
esac esac
disabled yasm || { check_yasm "pabsw xmm0, xmm0" && enable yasm; } disabled yasm || { check_yasm "pabsw xmm0, xmm0" && enable yasm; }
case "$cpu" in
athlon*|opteron*|k8*|pentium|pentium-mmx|prescott|nocona|atom|geode)
disable fast_clz
;;
esac
fi fi
if check_func dlopen; then if check_func dlopen; then