/*
* 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
|
