diff options
Diffstat (limited to 'libavcodec')
| -rw-r--r-- | libavcodec/msmpeg4.c | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/libavcodec/msmpeg4.c b/libavcodec/msmpeg4.c index c5bd55b93c..b43db88d99 100644 --- a/libavcodec/msmpeg4.c +++ b/libavcodec/msmpeg4.c @@ -437,7 +437,7 @@ static int msmpeg4_pred_dc(MpegEncContext * s, int n, necessitate to modify mpegvideo.c. The problem comes from the fact they decided to store the quantized DC (which would lead to problems if Q could vary !) */ -#ifdef ARCH_X86 +#if defined ARCH_X86 && !defined PIC /* using 16bit divisions as they are large enough and 2x as fast */ asm volatile( "movl %3, %%eax \n\t" @@ -460,9 +460,11 @@ static int msmpeg4_pred_dc(MpegEncContext * s, int n, : "r" (scale) : "%eax", "%edx" ); -#elif defined (ARCH_ALPHA) +#else + /* #elif defined (ARCH_ALPHA) */ /* Divisions are extremely costly on Alpha; optimize the most - common case. */ + common case. But they are costly everywhere... + */ if (scale == 8) { a = (a + (8 >> 1)) / 8; b = (b + (8 >> 1)) / 8; @@ -472,10 +474,6 @@ static int msmpeg4_pred_dc(MpegEncContext * s, int n, b = (b + (scale >> 1)) / scale; c = (c + (scale >> 1)) / scale; } -#else - a = (a + (scale >> 1)) / scale; - b = (b + (scale >> 1)) / scale; - c = (c + (scale >> 1)) / scale; #endif /* XXX: WARNING: they did not choose the same test as MPEG4. This is very important ! */ |