+++ /dev/null
-/*
- * the input data is tranposed and each 16 bit element in the 8x8 matrix
- * is left aligned:
- * for example in 11...1110000 format
- * If the iDCT is of I macroblock then 0.5 needs to be added to the;DC Component
- * (element[0][0] of the matrix)
- */
-
-/* extrn re_matrix */
-
-/* constants */
-
-.data
- .align 16
- .type preSC, @object
-preSC: .short 16384, 22725, 21407, 19266, 16384, 12873, 8867, 4520
- .short 22725, 31521, 29692, 26722, 22725, 17855, 12299, 6270
- .short 21407, 29692, 27969, 25172, 21407, 16819, 11585, 5906
- .short 19266, 26722, 25172, 22654, 19266, 15137, 10426, 5315
- .short 16384, 22725, 21407, 19266, 16384, 12873, 8867, 4520
- .short 12873, 17855, 16819, 15137, 25746, 20228, 13933, 7103
- .short 17734, 24598, 23170, 20853, 17734, 13933, 9597, 4892
- .short 18081, 25080, 23624, 21261, 18081, 14206, 9785, 4988
- .size preSC, 128
- .align 8
- .type x0005000200010001, @object
- .size x0005000200010001, 8
-x0005000200010001:
- .long 0x00010001, 0x00050002
- .align 8
- .type x0040000000000000, @object
- .size x0040000000000000, 8
-x0040000000000000:
- .long 0, 0x00400000
- .align 8
- .type x5a825a825a825a82, @object
- .size x5a825a825a825a82, 8
-x5a825a825a825a82:
- .long 0x5a825a82, 0x5a825a82
- .align 8
- .type x539f539f539f539f, @object
- .size x539f539f539f539f, 8
-x539f539f539f539f:
- .long 0x539f539f, 0x539f539f
- .align 8
- .type x4546454645464546, @object
- .size x4546454645464546, 8
-x4546454645464546:
- .long 0x45464546, 0x45464546
- .align 8
- .type x61f861f861f861f8, @object
- .size x61f861f861f861f8, 8
-x61f861f861f861f8:
- .long 0x61f861f8, 0x61f861f8
-/* Static variables */
- .align 8
- .type x0, @object
- .size x0, 8
-x0:
- .long 0, 0
-/* Procedure */
-
-
- .align 8
-.text
- .align 4
-.globl IDCT_mmx
- .type IDCT_mmx, @function
-IDCT_mmx:
- pushl %ebp
- movl %esp, %ebp
- pushl %ebx
- pushl %ecx
- pushl %edx
- pushl %esi
- pushl %edi
-
- pushl $0 /* allocate the temp variables */
- pushl $0
- pushl $0
- pushl $0
- pushl $0
- pushl $0
- pushl $0
- pushl $0
-
- movl 8(%ebp), %esi /* source matrix */
- leal preSC, %ecx
-/* column 0: even part
- * use V4, V12, V0, V8 to produce V22..V25
- */
- movq 8*12(%ecx), %mm0 /* maybe the first mul can be done together */
- /* with the dequantization in iHuff module */
- pmulhw 8*12(%esi), %mm0 /* V12 */
- movq 8*4(%ecx), %mm1
- pmulhw 8*4(%esi), %mm1 /* V4 */
- movq (%ecx), %mm3
- psraw $1, %mm0 /* t64=t66 */
- pmulhw (%esi), %mm3 /* V0 */
- movq 8*8(%ecx), %mm5 /* duplicate V4 */
- movq %mm1, %mm2 /* added 11/1/96 */
- pmulhw 8*8(%esi),%mm5 /* V8 */
- psubsw %mm0, %mm1 /* V16 */
- pmulhw x5a825a825a825a82, %mm1 /* 23170 ->V18 */
- paddsw %mm0, %mm2 /* V17 */
- movq %mm2, %mm0 /* duplicate V17 */
- psraw $1, %mm2 /* t75=t82 */
- psraw $2, %mm0 /* t72 */
- movq %mm3, %mm4 /* duplicate V0 */
- paddsw %mm5, %mm3 /* V19 */
- psubsw %mm5, %mm4 /* V20 ;mm5 free */
-/* moved from the block below */
- movq 8*10(%ecx), %mm7
- psraw $1, %mm3 /* t74=t81 */
- movq %mm3, %mm6 /* duplicate t74=t81 */
- psraw $2, %mm4 /* t77=t79 */
- psubsw %mm0, %mm1 /* V21 ; mm0 free */
- paddsw %mm2, %mm3 /* V22 */
- movq %mm1, %mm5 /* duplicate V21 */
- paddsw %mm4, %mm1 /* V23 */
- movq %mm3, 8*4(%esi) /* V22 */
- psubsw %mm5, %mm4 /* V24; mm5 free */
- movq %mm1, 8*12(%esi) /* V23 */
- psubsw %mm2, %mm6 /* V25; mm2 free */
- movq %mm4, (%esi) /* V24 */
-/* keep mm6 alive all along the next block */
- /* movq %mm6, 8*8(%esi) V25 */
-/* column 0: odd part
- * use V2, V6, V10, V14 to produce V31, V39, V40, V41
- */
-/* moved above: movq 8*10(%ecx), %mm7 */
-
- pmulhw 8*10(%esi), %mm7 /* V10 */
- movq 8*6(%ecx), %mm0
- pmulhw 8*6(%esi), %mm0 /* V6 */
- movq 8*2(%ecx), %mm5
- movq %mm7, %mm3 /* duplicate V10 */
- pmulhw 8*2(%esi), %mm5 /* V2 */
- movq 8*14(%ecx), %mm4
- psubsw %mm0, %mm7 /* V26 */
- pmulhw 8*14(%esi), %mm4 /* V14 */
- paddsw %mm0, %mm3 /* V29 ; free mm0 */
- movq %mm7, %mm1 /* duplicate V26 */
- psraw $1, %mm3 /* t91=t94 */
- pmulhw x539f539f539f539f,%mm7 /* V33 */
- psraw $1, %mm1 /* t96 */
- movq %mm5, %mm0 /* duplicate V2 */
- psraw $2, %mm4 /* t85=t87 */
- paddsw %mm4,%mm5 /* V27 */
- psubsw %mm4, %mm0 /* V28 ; free mm4 */
- movq %mm0, %mm2 /* duplicate V28 */
- psraw $1, %mm5 /* t90=t93 */
- pmulhw x4546454645464546,%mm0 /* V35 */
- psraw $1, %mm2 /* t97 */
- movq %mm5, %mm4 /* duplicate t90=t93 */
- psubsw %mm2, %mm1 /* V32 ; free mm2 */
- pmulhw x61f861f861f861f8,%mm1 /* V36 */
- psllw $1, %mm7 /* t107 */
- paddsw %mm3, %mm5 /* V31 */
- psubsw %mm3, %mm4 /* V30 ; free mm3 */
- pmulhw x5a825a825a825a82,%mm4 /* V34 */
- nop
- psubsw %mm1, %mm0 /* V38 */
- psubsw %mm7, %mm1 /* V37 ; free mm7 */
- psllw $1, %mm1 /* t114 */
-/* move from the next block */
- movq %mm6, %mm3 /* duplicate V25 */
-/* move from the next block */
- movq 8*4(%esi), %mm7 /* V22 */
- psllw $1, %mm0 /* t110 */
- psubsw %mm5, %mm0 /* V39 (mm5 needed for next block) */
- psllw $2, %mm4 /* t112 */
-/* moved from the next block */
- movq 8*12(%esi), %mm2 /* V23 */
- psubsw %mm0, %mm4 /* V40 */
- paddsw %mm4, %mm1 /* V41; free mm0 */
-/* moved from the next block */
- psllw $1, %mm2 /* t117=t125 */
-/* column 0: output butterfly */
-/* moved above:
- * movq %mm6, %mm3 duplicate V25
- * movq 8*4(%esi), %mm7 V22
- * movq 8*12(%esi), %mm2 V23
- * psllw $1, %mm2 t117=t125
- */
- psubsw %mm1, %mm6 /* tm6 */
- paddsw %mm1, %mm3 /* tm8; free mm1 */
- movq %mm7, %mm1 /* duplicate V22 */
- paddsw %mm5, %mm7 /* tm0 */
- movq %mm3, 8*8(%esi) /* tm8; free mm3 */
- psubsw %mm5, %mm1 /* tm14; free mm5 */
- movq %mm6, 8*6(%esi) /* tm6; free mm6 */
- movq %mm2, %mm3 /* duplicate t117=t125 */
- movq (%esi), %mm6 /* V24 */
- paddsw %mm0, %mm2 /* tm2 */
- movq %mm7, (%esi) /* tm0; free mm7 */
- psubsw %mm0, %mm3 /* tm12; free mm0 */
- movq %mm1, 8*14(%esi) /* tm14; free mm1 */
- psllw $1, %mm6 /* t119=t123 */
- movq %mm2, 8*2(%esi) /* tm2; free mm2 */
- movq %mm6, %mm0 /* duplicate t119=t123 */
- movq %mm3, 8*12(%esi) /* tm12; free mm3 */
- paddsw %mm4, %mm6 /* tm4 */
-/* moved from next block */
- movq 8*5(%ecx), %mm1
- psubsw %mm4, %mm0 /* tm10; free mm4 */
-/* moved from next block */
- pmulhw 8*5(%esi), %mm1 /* V5 */
- movq %mm6, 8*4(%esi) /* tm4; free mm6 */
- movq %mm0, 8*10(%esi) /* tm10; free mm0 */
-/* column 1: even part
- * use V5, V13, V1, V9 to produce V56..V59
- */
-/* moved to prev block:
- * movq 8*5(%ecx), %mm1
- * pmulhw 8*5(%esi), %mm1 V5
- */
- movq 8*13(%ecx), %mm7
- psllw $1, %mm1 /* t128=t130 */
- pmulhw 8*13(%esi), %mm7 /* V13 */
- movq %mm1, %mm2 /* duplicate t128=t130 */
- movq 8(%ecx), %mm3
- pmulhw 8(%esi), %mm3 /* V1 */
- movq 8*9(%ecx), %mm5
- psubsw %mm7, %mm1 /* V50 */
- pmulhw 8*9(%esi), %mm5 /* V9 */
- paddsw %mm7, %mm2 /* V51 */
- pmulhw x5a825a825a825a82, %mm1 /* 23170 ->V52 */
- movq %mm2, %mm6 /* duplicate V51 */
- psraw $1, %mm2 /* t138=t144 */
- movq %mm3, %mm4 /* duplicate V1 */
- psraw $2, %mm6 /* t136 */
- paddsw %mm5, %mm3 /* V53 */
- psubsw %mm5, %mm4 /* V54 ;mm5 free */
- movq %mm3, %mm7 /* duplicate V53 */
-/* moved from next block */
- movq 8*11(%ecx), %mm0
- psraw $1, %mm4 /* t140=t142 */
- psubsw %mm6, %mm1 /* V55 ; mm6 free */
- paddsw %mm2, %mm3 /* V56 */
- movq %mm4, %mm5 /* duplicate t140=t142 */
- paddsw %mm1, %mm4 /* V57 */
- movq %mm3, 8*5(%esi) /* V56 */
- psubsw %mm1, %mm5 /* V58; mm1 free */
- movq %mm4, 8*13(%esi) /* V57 */
- psubsw %mm2, %mm7 /* V59; mm2 free */
- movq %mm5, 8*9(%esi) /* V58 */
-/* keep mm7 alive all along the next block
- * movq %mm7, 8(%esi) V59
- * moved above
- * movq 8*11(%ecx), %mm0
- */
- pmulhw 8*11(%esi), %mm0 /* V11 */
- movq 8*7(%ecx), %mm6
- pmulhw 8*7(%esi), %mm6 /* V7 */
- movq 8*15(%ecx), %mm4
- movq %mm0, %mm3 /* duplicate V11 */
- pmulhw 8*15(%esi), %mm4 /* V15 */
- movq 8*3(%ecx), %mm5
- psllw $1, %mm6 /* t146=t152 */
- pmulhw 8*3(%esi), %mm5 /* V3 */
- paddsw %mm6, %mm0 /* V63 */
-/* note that V15 computation has a correction step:
- * this is a 'magic' constant that rebiases the results to be closer to the
- * expected result. this magic constant can be refined to reduce the error
- * even more by doing the correction step in a later stage when the number
- * is actually multiplied by 16
- */
- paddw x0005000200010001, %mm4
- psubsw %mm6, %mm3 /* V60 ; free mm6 */
- psraw $1, %mm0 /* t154=t156 */
- movq %mm3, %mm1 /* duplicate V60 */
- pmulhw x539f539f539f539f, %mm1 /* V67 */
- movq %mm5, %mm6 /* duplicate V3 */
- psraw $2, %mm4 /* t148=t150 */
- paddsw %mm4, %mm5 /* V61 */
- psubsw %mm4, %mm6 /* V62 ; free mm4 */
- movq %mm5, %mm4 /* duplicate V61 */
- psllw $1, %mm1 /* t169 */
- paddsw %mm0, %mm5 /* V65 -> result */
- psubsw %mm0, %mm4 /* V64 ; free mm0 */
- pmulhw x5a825a825a825a82, %mm4 /* V68 */
- psraw $1, %mm3 /* t158 */
- psubsw %mm6, %mm3 /* V66 */
- movq %mm5, %mm2 /* duplicate V65 */
- pmulhw x61f861f861f861f8, %mm3 /* V70 */
- psllw $1, %mm6 /* t165 */
- pmulhw x4546454645464546, %mm6 /* V69 */
- psraw $1, %mm2 /* t172 */
-/* moved from next block */
- movq 8*5(%esi), %mm0 /* V56 */
- psllw $1, %mm4 /* t174 */
-/* moved from next block */
- psraw $1, %mm0 /* t177=t188 */
- nop
- psubsw %mm3, %mm6 /* V72 */
- psubsw %mm1, %mm3 /* V71 ; free mm1 */
- psubsw %mm2, %mm6 /* V73 ; free mm2 */
-/* moved from next block */
- psraw $1, %mm5 /* t178=t189 */
- psubsw %mm6, %mm4 /* V74 */
-/* moved from next block */
- movq %mm0, %mm1 /* duplicate t177=t188 */
- paddsw %mm4, %mm3 /* V75 */
-/* moved from next block */
- paddsw %mm5, %mm0 /* tm1 */
-/* location
- * 5 - V56
- * 13 - V57
- * 9 - V58
- * X - V59, mm7
- * X - V65, mm5
- * X - V73, mm6
- * X - V74, mm4
- * X - V75, mm3
- * free mm0, mm1 & mm2
- * moved above
- * movq 8*5(%esi), %mm0 V56
- * psllw $1, %mm0 t177=t188 ! new !!
- * psllw $1, %mm5 t178=t189 ! new !!
- * movq %mm0, %mm1 duplicate t177=t188
- * paddsw %mm5, %mm0 tm1
- */
- movq 8*13(%esi), %mm2 /* V57 */
- psubsw %mm5, %mm1 /* tm15; free mm5 */
- movq %mm0, 8(%esi) /* tm1; free mm0 */
- psraw $1, %mm7 /* t182=t184 ! new !! */
-/* save the store as used directly in the transpose
- * movq %mm1, 120(%esi) tm15; free mm1
- */
- movq %mm7, %mm5 /* duplicate t182=t184 */
- psubsw %mm3, %mm7 /* tm7 */
- paddsw %mm3, %mm5 /* tm9; free mm3 */
- movq 8*9(%esi), %mm0 /* V58 */
- movq %mm2, %mm3 /* duplicate V57 */
- movq %mm7, 8*7(%esi) /* tm7; free mm7 */
- psubsw %mm6, %mm3 /* tm13 */
- paddsw %mm6, %mm2 /* tm3 ; free mm6 */
-/* 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
projects / goodguy / history.git / blobdiff