From 8bdbae01fec3bb8395a6f90bf5a92a58ad2102f8 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Mon, 14 Jan 2002 04:29:19 +0000 Subject: [PATCH] (commit by michael) memset() in MMX Originally committed as revision 263 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavcodec/h263dec.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/libavcodec/h263dec.c b/libavcodec/h263dec.c index be76e3030f..5e79e20051 100644 --- a/libavcodec/h263dec.c +++ b/libavcodec/h263dec.c @@ -162,7 +162,27 @@ static int h263_decode_frame(AVCodecContext *avctx, s->c_dc_scale = 8; } +#ifdef HAVE_MMX + if (mm_flags & MM_MMX) { + asm volatile( + "pxor %%mm7, %%mm7 \n\t" + "movl $-128*6, %%eax \n\t" + "1: \n\t" + "movq %%mm7, (%0, %%eax) \n\t" + "movq %%mm7, 8(%0, %%eax) \n\t" + "movq %%mm7, 16(%0, %%eax) \n\t" + "movq %%mm7, 24(%0, %%eax) \n\t" + "addl $32, %%eax \n\t" + " js 1b \n\t" + : : "r" (((int)s->block)+128*6) + : "%eax" + ); + }else{ + memset(s->block, 0, sizeof(s->block)); + } +#else memset(s->block, 0, sizeof(s->block)); +#endif s->mv_dir = MV_DIR_FORWARD; s->mv_type = MV_TYPE_16X16; if (s->h263_msmpeg4) {