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Code Issues Releases Activity

IWMMXT-specific dsputils clear_blocks function.

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patch by David Bateman, adb014 gmail com

Originally committed as revision 8632 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
David Bateman 2007-04-06 09:59:55 +00:00 committed by Diego Biurrun
parent e19fbbec95
commit e8d0041701
1 changed files with 21 additions and 0 deletions
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21
libavcodec/armv4l/dsputil_iwmmxt.c
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@ -123,6 +123,25 @@ void add_pixels_clamped_iwmmxt(const DCTELEM *block, uint8_t *pixels, int line_s
: "cc", "memory", "r12");
}
static void clear_blocks_iwmmxt(DCTELEM *blocks)
{
__asm __volatile(
"wzero wr0 \n\t"
"mov r1, #(128 * 6 / 32) \n\t"
"1: \n\t"
"wstrd wr0, [%0] \n\t"
"wstrd wr0, [%0, #8] \n\t"
"wstrd wr0, [%0, #16] \n\t"
"wstrd wr0, [%0, #24] \n\t"
"subs r1, r1, #1 \n\t"
"add %0, %0, #32 \n\t"
"bne 1b \n\t"
: "+r"(blocks)
:
: "r1"
);
}
static void nop(uint8_t *block, const uint8_t *pixels, int line_size, int h)
{
return;
@ -146,6 +165,8 @@ void dsputil_init_iwmmxt(DSPContext* c, AVCodecContext *avctx)
c->add_pixels_clamped = add_pixels_clamped_iwmmxt;
c->clear_blocks = clear_blocks_iwmmxt;
c->put_pixels_tab[0][0] = put_pixels16_iwmmxt;
c->put_pixels_tab[0][1] = put_pixels16_x2_iwmmxt;
c->put_pixels_tab[0][2] = put_pixels16_y2_iwmmxt;