📄 mmxidct.s
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/* moved up from the transpose */
movq %mm3, %mm7
/* moved up from the transpose */
punpcklwd %mm1, %mm3
movq %mm0, %mm6 /* duplicate V58 */
movq %mm2, 8*3(%esi) /* tm3; free mm2 */
paddsw %mm4, %mm0 /* tm5 */
psubsw %mm4, %mm6 /* tm11; free mm4 */
/* moved up from the transpose */
punpckhwd %mm1, %mm7
movq %mm0, 8*5(%esi) /* tm5; free mm0 */
/* moved up from the transpose */
movq %mm5, %mm2
/* transpose - M4 part
* --------- ---------
* | M1 | M2 | | M1'| M3'|
* --------- --> ---------
* | M3 | M4 | | M2'| M4'|
* --------- ---------
* Two alternatives: use full mmword approach so the following code can be
* scheduled before the transpose is done without stores, or use the faster
* half mmword stores (when possible)
*/
movd %mm3, 8*9+4(%esi) /* MS part of tmt9 */
punpcklwd %mm6, %mm5
movd %mm7, 8*13+4(%esi) /* MS part of tmt13 */
punpckhwd %mm6, %mm2
movd %mm5, 8*9(%esi) /* LS part of tmt9 */
punpckhdq %mm3, %mm5 /* free mm3 */
movd %mm2, 8*13(%esi) /* LS part of tmt13 */
punpckhdq %mm7, %mm2 /* free mm7 */
/* moved up from the M3 transpose */
movq 8*8(%esi), %mm0
/* moved up from the M3 transpose */
movq 8*10(%esi), %mm1
/* moved up from the M3 transpose */
movq %mm0, %mm3
/* shuffle the rest of the data, and write it with 2 mmword writes */
movq %mm5, 8*11(%esi) /* tmt11 */
/* moved up from the M3 transpose */
punpcklwd %mm1, %mm0
movq %mm2, 8*15(%esi) /* tmt15 */
/* moved up from the M3 transpose */
punpckhwd %mm1, %mm3
/* transpose - M3 part
* moved up to previous code section
* movq 8*8(%esi), %mm0
* movq 8*10(%esi), %mm1
* movq %mm0, %mm3
* punpcklwd %mm1, %mm0
* punpckhwd %mm1, %mm3
*/
movq 8*12(%esi), %mm6
movq 8*14(%esi), %mm4
movq %mm6, %mm2
/* shuffle the data and write the lower parts of the transposed in 4 dwords */
punpcklwd %mm4, %mm6
movq %mm0, %mm1
punpckhdq %mm6, %mm1
movq %mm3, %mm7
punpckhwd %mm4, %mm2 /* free mm4 */
punpckldq %mm6, %mm0 /* free mm6 */
/* moved from next block */
movq 8*13(%esi), %mm4 /* tmt13 */
punpckldq %mm2, %mm3
punpckhdq %mm2, %mm7 /* free mm2 */
/* moved from next block */
movq %mm3, %mm5 /* duplicate tmt5 */
/* column 1: even part (after transpose)
* moved above
* movq %mm3, %mm5 duplicate tmt5
* movq 8*13(%esi), %mm4 tmt13
*/
psubsw %mm4, %mm3 /* V134 */
pmulhw x5a825a825a825a82, %mm3 /* 23170 ->V136 */
movq 8*9(%esi), %mm6 /* tmt9 */
paddsw %mm4, %mm5 /* V135 ; mm4 free */
movq %mm0, %mm4 /* duplicate tmt1 */
paddsw %mm6, %mm0 /* V137 */
psubsw %mm6, %mm4 /* V138 ; mm6 free */
psllw $2, %mm3 /* t290 */
psubsw %mm5, %mm3 /* V139 */
movq %mm0, %mm6 /* duplicate V137 */
paddsw %mm5, %mm0 /* V140 */
movq %mm4, %mm2 /* duplicate V138 */
paddsw %mm3, %mm2 /* V141 */
psubsw %mm3, %mm4 /* V142 ; mm3 free */
movq %mm0, 8*9(%esi) /* V140 */
psubsw %mm5, %mm6 /* V143 ; mm5 free */
/* moved from next block */
movq 8*11(%esi), %mm0 /* tmt11 */
movq %mm2, 8*13(%esi) /* V141 */
/* moved from next block */
movq %mm0, %mm2 /* duplicate tmt11 */
/* column 1: odd part (after transpose) */
/* moved up to the prev block
* movq 8*11(%esi), %mm0 tmt11
* movq %mm0, %mm2 duplicate tmt11
*/
movq 8*15(%esi), %mm5 /* tmt15 */
psubsw %mm7, %mm0 /* V144 */
movq %mm0, %mm3 /* duplicate V144 */
paddsw %mm7, %mm2 /* V147 ; free mm7 */
pmulhw x539f539f539f539f, %mm0 /* 21407-> V151 */
movq %mm1, %mm7 /* duplicate tmt3 */
paddsw %mm5, %mm7 /* V145 */
psubsw %mm5, %mm1 /* V146 ; free mm5 */
psubsw %mm1, %mm3 /* V150 */
movq %mm7, %mm5 /* duplicate V145 */
pmulhw x4546454645464546, %mm1 /* 17734-> V153 */
psubsw %mm2, %mm5 /* V148 */
pmulhw x61f861f861f861f8, %mm3 /* 25080-> V154 */
psllw $2, %mm0 /* t311 */
pmulhw x5a825a825a825a82, %mm5 /* 23170-> V152 */
paddsw %mm2, %mm7 /* V149 ; free mm2 */
psllw $1, %mm1 /* t313 */
nop /* without the nop - freeze here for one clock */
movq %mm3, %mm2 /* duplicate V154 */
psubsw %mm0, %mm3 /* V155 ; free mm0 */
psubsw %mm2, %mm1 /* V156 ; free mm2 */
/* moved from the next block */
movq %mm6, %mm2 /* duplicate V143 */
/* moved from the next block */
movq 8*13(%esi), %mm0 /* V141 */
psllw $1, %mm1 /* t315 */
psubsw %mm7, %mm1 /* V157 (keep V149) */
psllw $2, %mm5 /* t317 */
psubsw %mm1, %mm5 /* V158 */
psllw $1, %mm3 /* t319 */
paddsw %mm5, %mm3 /* V159 */
/* column 1: output butterfly (after transform)
* moved to the prev block
* movq %mm6, %mm2 duplicate V143
* movq 8*13(%esi), %mm0 V141
*/
psubsw %mm3, %mm2 /* V163 */
paddsw %mm3, %mm6 /* V164 ; free mm3 */
movq %mm4, %mm3 /* duplicate V142 */
psubsw %mm5, %mm4 /* V165 ; free mm5 */
movq %mm2, (%esp) /* out7 */
psraw $4, %mm6
psraw $4, %mm4
paddsw %mm5, %mm3 /* V162 */
movq 8*9(%esi), %mm2 /* V140 */
movq %mm0, %mm5 /* duplicate V141 */
/* in order not to perculate this line up,
* we read 72(%esi) very near to this location
*/
movq %mm6, 8*9(%esi) /* out9 */
paddsw %mm1, %mm0 /* V161 */
movq %mm3, 8(%esp) /* out5 */
psubsw %mm1, %mm5 /* V166 ; free mm1 */
movq %mm4, 8*11(%esi) /* out11 */
psraw $4, %mm5
movq %mm0, 16(%esp) /* out3 */
movq %mm2, %mm4 /* duplicate V140 */
movq %mm5, 8*13(%esi) /* out13 */
paddsw %mm7, %mm2 /* V160 */
/* moved from the next block */
movq 8(%esi), %mm0
psubsw %mm7, %mm4 /* V167 ; free mm7 */
/* moved from the next block */
movq 8*3(%esi), %mm7
psraw $4, %mm4
movq %mm2, 24(%esp) /* out1 */
/* moved from the next block */
movq %mm0, %mm1
movq %mm4, 8*15(%esi) /* out15 */
/* moved from the next block */
punpcklwd %mm7, %mm0
/* transpose - M2 parts
* moved up to the prev block
* movq 8(%esi), %mm0
* movq 8*3(%esi), %mm7
* movq %mm0, %mm1
* punpcklwd %mm7, %mm0
*/
movq 8*5(%esi), %mm5
punpckhwd %mm7, %mm1
movq 8*7(%esi), %mm4
movq %mm5, %mm3
/* shuffle the data and write the lower parts of the trasposed in 4 dwords */
movd %mm0, 8*8(%esi) /* LS part of tmt8 */
punpcklwd %mm4, %mm5
movd %mm1, 8*12(%esi) /* LS part of tmt12 */
punpckhwd %mm4, %mm3
movd %mm5, 8*8+4(%esi) /* MS part of tmt8 */
punpckhdq %mm5, %mm0 /* tmt10 */
movd %mm3, 8*12+4(%esi) /* MS part of tmt12 */
punpckhdq %mm3, %mm1 /* tmt14 */
/* transpose - M1 parts */
movq (%esi), %mm7
movq 8*2(%esi), %mm2
movq %mm7, %mm6
movq 8*4(%esi), %mm5
punpcklwd %mm2, %mm7
movq 8*6(%esi), %mm4
punpckhwd %mm2, %mm6 /* free mm2 */
movq %mm5, %mm3
punpcklwd %mm4, %mm5
punpckhwd %mm4, %mm3 /* free mm4 */
movq %mm7, %mm2
movq %mm6, %mm4
punpckldq %mm5, %mm7 /* tmt0 */
punpckhdq %mm5, %mm2 /* tmt2 ; free mm5 */
/* shuffle the rest of the data, and write it with 2 mmword writes */
punpckldq %mm3, %mm6 /* tmt4 */
/* moved from next block */
movq %mm2, %mm5 /* duplicate tmt2 */
punpckhdq %mm3, %mm4 /* tmt6 ; free mm3 */
/* moved from next block */
movq %mm0, %mm3 /* duplicate tmt10 */
/* column 0: odd part (after transpose)
*moved up to prev block
* movq %mm0, %mm3 duplicate tmt10
* movq %mm2, %mm5 duplicate tmt2
*/
psubsw %mm4, %mm0 /* V110 */
paddsw %mm4, %mm3 /* V113 ; free mm4 */
movq %mm0, %mm4 /* duplicate V110 */
paddsw %mm1, %mm2 /* V111 */
pmulhw x539f539f539f539f, %mm0 /* 21407-> V117 */
psubsw %mm1, %mm5 /* V112 ; free mm1 */
psubsw %mm5, %mm4 /* V116 */
movq %mm2, %mm1 /* duplicate V111 */
pmulhw x4546454645464546, %mm5 /* 17734-> V119 */
psubsw %mm3, %mm2 /* V114 */
pmulhw x61f861f861f861f8, %mm4 /* 25080-> V120 */
paddsw %mm3, %mm1 /* V115 ; free mm3 */
pmulhw x5a825a825a825a82, %mm2 /* 23170-> V118 */
psllw $2, %mm0 /* t266 */
movq %mm1, (%esi) /* save V115 */
psllw $1, %mm5 /* t268 */
psubsw %mm4, %mm5 /* V122 */
psubsw %mm0, %mm4 /* V121 ; free mm0 */
psllw $1, %mm5 /* t270 */
psubsw %mm1, %mm5 /* V123 ; free mm1 */
psllw $2, %mm2 /* t272 */
psubsw %mm5, %mm2 /* V124 (keep V123) */
psllw $1, %mm4 /* t274 */
movq %mm5, 8*2(%esi) /* save V123 ; free mm5 */
paddsw %mm2, %mm4 /* V125 (keep V124) */
/* column 0: even part (after transpose) */
movq 8*12(%esi), %mm0 /* tmt12 */
movq %mm6, %mm3 /* duplicate tmt4 */
psubsw %mm0, %mm6 /* V100 */
paddsw %mm0, %mm3 /* V101 ; free mm0 */
pmulhw x5a825a825a825a82, %mm6 /* 23170 ->V102 */
movq %mm7, %mm5 /* duplicate tmt0 */
movq 8*8(%esi), %mm1 /* tmt8 */
paddsw %mm1, %mm7 /* V103 */
psubsw %mm1, %mm5 /* V104 ; free mm1 */
movq %mm7, %mm0 /* duplicate V103 */
psllw $2, %mm6 /* t245 */
paddsw %mm3, %mm7 /* V106 */
movq %mm5, %mm1 /* duplicate V104 */
psubsw %mm3, %mm6 /* V105 */
psubsw %mm3, %mm0 /* V109; free mm3 */
paddsw %mm6, %mm5 /* V107 */
psubsw %mm6, %mm1 /* V108 ; free mm6 */
/* column 0: output butterfly (after transform) */
movq %mm1, %mm3 /* duplicate V108 */
paddsw %mm2, %mm1 /* out4 */
psraw $4, %mm1
psubsw %mm2, %mm3 /* out10 ; free mm2 */
psraw $4, %mm3
movq %mm0, %mm6 /* duplicate V109 */
movq %mm1, 8*4(%esi) /* out4 ; free mm1 */
psubsw %mm4, %mm0 /* out6 */
movq %mm3, 8*10(%esi) /* out10 ; free mm3 */
psraw $4, %mm0
paddsw %mm4, %mm6 /* out8 ; free mm4 */
movq %mm7, %mm1 /* duplicate V106 */
movq %mm0, 8*6(%esi) /* out6 ; free mm0 */
psraw $4, %mm6
movq (%esi), %mm4 /* V115 */
movq %mm6, 8*8(%esi) /* out8 ; free mm6 */
movq %mm5, %mm2 /* duplicate V107 */
movq 8*2(%esi), %mm3 /* V123 */
paddsw %mm4, %mm7 /* out0 */
/* moved up from next block */
movq 16(%esp), %mm0
psraw $4, %mm7
/* moved up from next block */
movq 8(%esp), %mm6
psubsw %mm4, %mm1 /* out14 ; free mm4 */
paddsw %mm3, %mm5 /* out2 */
psraw $4, %mm1
movq %mm7, (%esi) /* out0 ; free mm7 */
psraw $4, %mm5
movq %mm1, 8*14(%esi) /* out14 ; free mm1 */
psubsw %mm3, %mm2 /* out12 ; free mm3 */
movq %mm5, 8*2(%esi) /* out2 ; free mm5 */
psraw $4, %mm2
/* moved up to the prev block */
movq (%esp), %mm4
/* moved up to the prev block */
psraw $4, %mm0
movq %mm2, 8*12(%esi) /* out12 ; free mm2 */
/* moved up to the prev block */
psraw $4, %mm6
/* move back the data to its correct place
* moved up to the prev block
* movq 16(%esp), %mm0
* movq 8(%esp), %mm6
* movq (%esp), %mm4
* psraw $4, %mm0
* psraw $4, %mm6
*/
movq 24(%esp), %mm1
psraw $4, %mm4
movq %mm0, 8*3(%esi) /* out3 */
psraw $4, %mm1
movq %mm6, 8*5(%esi) /* out5 */
movq %mm4, 8*7(%esi) /* out7 */
movq %mm1, 8(%esi) /* out1 */
popl %edi /* Pop off the temp variables */
popl %edi
popl %edi
popl %edi
popl %edi
popl %edi
popl %edi
popl %edi
popl %edi /* Pop off the old variables */
popl %esi
popl %edx
popl %ecx
popl %ebx
movl %ebp, %esp
popl %ebp
ret
.Lfe1:
.size IDCT_mmx,.Lfe1-IDCT_mmx
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