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| author | Leon van Stuivenberg <leonvs@iae.nl> | 2003-03-18 20:08:57 +0000 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2003-03-18 20:08:57 +0000 |
| commit | 5031c5b47bfcd1b1a0684b0993069747f5c9dc4e (patch) | |
| tree | 1dafe8aabbb2ff1d826c13ea88274b075ff8f2b1 /libavcodec/ps2 | |
| parent | a05c8d7177857c8a78144cbccc512c282065195a (diff) | |
| download | ffmpeg-5031c5b47bfcd1b1a0684b0993069747f5c9dc4e.tar.gz | |
clear_blocks_mmi() optimization by BroadQ (and patch by Leon van Stuivenberg <leonvs at iae dot nl>)
Originally committed as revision 1691 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/ps2')
| -rw-r--r-- | libavcodec/ps2/dsputil_mmi.c | 27 |
1 files changed, 15 insertions, 12 deletions
diff --git a/libavcodec/ps2/dsputil_mmi.c b/libavcodec/ps2/dsputil_mmi.c index 68a3f3a821..93ae27cdbd 100644 --- a/libavcodec/ps2/dsputil_mmi.c +++ b/libavcodec/ps2/dsputil_mmi.c @@ -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" ); } |