diff options
| author | Mans Rullgard <mans@mansr.com> | 2011-12-12 01:33:17 +0000 |
|---|---|---|
| committer | Mans Rullgard <mans@mansr.com> | 2011-12-12 12:14:15 +0000 |
| commit | 5b0d35eaedbb08d0c11fa4f2b47a24d91aaa294d (patch) | |
| tree | 09f37c0b8353bda28d57f6a78cdcda48193f5910 | |
| parent | f64c2e710fa1a7b59753224e717f57c48462076f (diff) | |
x86: bswap: remove test for bswap instruction
Firstly, this test never worked as intended, always reporting
success. Secondly, bswap is available from 486 onward and can
thus be assumed present.
Signed-off-by: Mans Rullgard <mans@mansr.com>
| -rwxr-xr-x | configure | 3 | ||||
| -rw-r--r-- | libavutil/x86/bswap.h | 7 |
2 files changed, 0 insertions, 10 deletions
@@ -1053,7 +1053,6 @@ HAVE_LIST=" asm_mod_y attribute_may_alias attribute_packed - bswap closesocket cmov dcbzl @@ -2741,8 +2740,6 @@ EOF enabled ssse3 && check_asm ssse3 '"pabsw %xmm0, %xmm0"' enabled mmx2 && check_asm mmx2 '"pmaxub %mm0, %mm1"' - check_asm bswap '"bswap %%eax" ::: "%eax"' - if ! disabled_any asm mmx yasm; then if check_cmd $yasmexe --version; then enabled x86_64 && yasm_extra="-m amd64" diff --git a/libavutil/x86/bswap.h b/libavutil/x86/bswap.h index 6840b632cb..c6cf007c86 100644 --- a/libavutil/x86/bswap.h +++ b/libavutil/x86/bswap.h @@ -41,14 +41,7 @@ static av_always_inline av_const unsigned av_bswap16(unsigned x) #define av_bswap32 av_bswap32 static av_always_inline av_const uint32_t av_bswap32(uint32_t x) { -#if HAVE_BSWAP __asm__("bswap %0" : "+r" (x)); -#else - __asm__("rorw $8, %w0 \n\t" - "rorl $16, %0 \n\t" - "rorw $8, %w0" - : "+r"(x)); -#endif return x; } |