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(commit by michael)

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faster simple idct in MMX

Originally committed as revision 269 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2002-01-17 20:00:41 +00:00
parent ae40484c1c
commit 0a8d8945fd
2 changed files with 963 additions and 1135 deletions
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18
libavcodec/dsputil.c
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@ -71,16 +71,16 @@ UINT8 ff_alternate_vertical_scan[64] = {
38, 46, 54, 62, 39, 47, 55, 63, 38, 46, 54, 62, 39, 47, 55, 63,
}; };
/* Input permutation for the simple_idct_mmx */
static UINT8 simple_mmx_permutation[64]={ static UINT8 simple_mmx_permutation[64]={
0x00, 0x08, 0x01, 0x09, 0x04, 0x0C, 0x05, 0x0D, 0x00, 0x08, 0x04, 0x09, 0x01, 0x0C, 0x05, 0x0D,
0x10, 0x18, 0x11, 0x19, 0x14, 0x1C, 0x15, 0x1D, 0x10, 0x18, 0x14, 0x19, 0x11, 0x1C, 0x15, 0x1D,
0x02, 0x0A, 0x03, 0x0B, 0x06, 0x0E, 0x07, 0x0F, 0x20, 0x28, 0x24, 0x29, 0x21, 0x2C, 0x25, 0x2D,
0x12, 0x1A, 0x13, 0x1B, 0x16, 0x1E, 0x17, 0x1F, 0x12, 0x1A, 0x16, 0x1B, 0x13, 0x1E, 0x17, 0x1F,
0x20, 0x28, 0x21, 0x29, 0x24, 0x2C, 0x25, 0x2D, 0x02, 0x0A, 0x06, 0x0B, 0x03, 0x0E, 0x07, 0x0F,
0x30, 0x38, 0x31, 0x39, 0x34, 0x3C, 0x35, 0x3D, 0x30, 0x38, 0x34, 0x39, 0x31, 0x3C, 0x35, 0x3D,
0x22, 0x2A, 0x23, 0x2B, 0x26, 0x2E, 0x27, 0x2F, 0x22, 0x2A, 0x26, 0x2B, 0x23, 0x2E, 0x27, 0x2F,
0x32, 0x3A, 0x33, 0x3B, 0x36, 0x3E, 0x37, 0x3F, 0x32, 0x3A, 0x36, 0x3B, 0x33, 0x3E, 0x37, 0x3F,
}; };
/* used to skip zeros at the end */ /* used to skip zeros at the end */

2080
libavcodec/i386/simple_idct_mmx.c
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