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clear_blocks_mmi() optimization by BroadQ (and patch by Leon van Stuivenberg <leonvs at iae dot nl>)

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Originally committed as revision 1691 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Leon van Stuivenberg 2003-03-18 20:08:57 +00:00 committed by Michael Niedermayer
parent a05c8d7177
commit 5031c5b47b
1 changed files with 15 additions and 12 deletions
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27
libavcodec/ps2/dsputil_mmi.c
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@ -17,6 +17,7 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* MMI optimization by Leon van Stuivenberg <leonvs@iae.nl>
* clear_blocks_mmi() by BroadQ
*/
#include "../dsputil.h"
@ -28,19 +29,21 @@ void ff_mmi_idct_add(uint8_t *dest, int line_size, DCTELEM *block);
static void clear_blocks_mmi(DCTELEM * blocks)
{
int i;
for (i = 0; i < 6; i++) {
asm volatile(
"sq $0, 0(%0) \n\t"
"sq $0, 16(%0) \n\t"
"sq $0, 32(%0) \n\t"
"sq $0, 48(%0) \n\t"
"sq $0, 64(%0) \n\t"
"sq $0, 80(%0) \n\t"
"sq $0, 96(%0) \n\t"
"sq $0, 112(%0) \n\t" :: "r" (blocks) : "memory" );
blocks += 64;
}
".set noreorder \n"
"addiu $9, %0, 768 \n"
"nop \n"
"1: \n"
"sq $0, 0(%0) \n"
"move $8, %0 \n"
"addi %0, %0, 64 \n"
"sq $0, 16($8) \n"
"slt $10, %0, $9 \n"
"sq $0, 32($8) \n"
"bnez $10, 1b \n"
"sq $0, 48($8) \n"
".set reorder \n"
: "+r" (blocks) :: "$8", "$9", "memory" );
}