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;/************************************************************************** |
| 2 |
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; * |
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; * XVID MPEG-4 VIDEO CODEC |
| 4 |
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; * - 3dne Quantization/Dequantization - |
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; * |
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; * Copyright (C) 2002-2003 Peter Ross <pross@xvid.org> |
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; * 2002-2003 Michael Militzer <isibaar@xvid.org> |
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; * 2002-2003 Pascal Massimino <skal@planet-d.net> |
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; * |
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; * This program is free software ; you can redistribute it and/or modify |
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; * it under the terms of the GNU General Public License as published by |
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; * the Free Software Foundation ; either version 2 of the License, or |
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; * (at your option) any later version. |
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; * |
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; * This program is distributed in the hope that it will be useful, |
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; * but WITHOUT ANY WARRANTY ; without even the implied warranty of |
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; * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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; * GNU General Public License for more details. |
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; * |
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; * You should have received a copy of the GNU General Public License |
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; * along with this program ; if not, write to the Free Software |
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; * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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; * |
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; * $Id$ |
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; * |
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; *************************************************************************/ |
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|
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%define SATURATE |
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|
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BITS 32 |
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|
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%macro cglobal 1 |
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%ifdef PREFIX |
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global _%1 |
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%define %1 _%1 |
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%else |
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global %1 |
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%endif |
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%endmacro |
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|
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%macro cextern 1 |
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%ifdef PREFIX |
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extern _%1 |
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%define %1 _%1 |
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%else |
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extern %1 |
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%endif |
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%endmacro |
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|
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;============================================================================= |
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; Local data (Read Only) |
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;============================================================================= |
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|
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%ifdef FORMAT_COFF |
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SECTION .rodata data |
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%else |
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SECTION .rodata data align=16 |
| 58 |
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%endif |
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|
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mmx_one: |
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times 4 dw 1 |
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|
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;----------------------------------------------------------------------------- |
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; divide by 2Q table |
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;----------------------------------------------------------------------------- |
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|
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ALIGN 16 |
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mmx_div: |
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times 4 dw 65535 ; the div by 2 formula will overflow for the case |
| 70 |
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; quant=1 but we don't care much because quant=1 |
| 71 |
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; is handled by a different piece of code that |
| 72 |
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; doesn't use this table. |
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%assign quant 2 |
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%rep 30 |
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times 4 dw (1<<17) / (quant*2) + 1 |
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%assign quant quant+1 |
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%endrep |
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|
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;----------------------------------------------------------------------------- |
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; intra matrix |
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;----------------------------------------------------------------------------- |
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|
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cextern intra_matrix |
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cextern intra_matrix_fix |
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|
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;----------------------------------------------------------------------------- |
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; inter matrix |
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;----------------------------------------------------------------------------- |
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|
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cextern inter_matrix |
| 91 |
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cextern inter_matrix_fix |
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|
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|
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%define VM18P 3 |
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%define VM18Q 4 |
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|
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|
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;----------------------------------------------------------------------------- |
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; quantd table |
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;----------------------------------------------------------------------------- |
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|
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quantd: |
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%assign quant 1 |
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%rep 31 |
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times 4 dw ((VM18P*quant) + (VM18Q/2)) / VM18Q |
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%assign quant quant+1 |
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%endrep |
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|
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;----------------------------------------------------------------------------- |
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; multiple by 2Q table |
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;----------------------------------------------------------------------------- |
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|
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mmx_mul_quant: |
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%assign quant 1 |
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%rep 31 |
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times 4 dw quant |
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%assign quant quant+1 |
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%endrep |
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|
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;----------------------------------------------------------------------------- |
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; saturation limits |
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;----------------------------------------------------------------------------- |
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|
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ALIGN 16 |
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|
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mmx_32767_minus_2047: |
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times 4 dw (32767-2047) |
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mmx_32768_minus_2048: |
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times 4 dw (32768-2048) |
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mmx_2047: |
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times 4 dw 2047 |
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mmx_minus_2048: |
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times 4 dw (-2048) |
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zero: |
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times 4 dw 0 |
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|
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;============================================================================= |
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; Code |
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;============================================================================= |
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|
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SECTION .text |
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|
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cglobal quant_mpeg_intra_mmx |
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cglobal quant_mpeg_inter_mmx |
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cglobal dequant_mpeg_intra_mmx |
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cglobal dequant_mpeg_inter_mmx |
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|
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;----------------------------------------------------------------------------- |
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; |
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; uint32_t quant_mpeg_intra_mmx(int16_t * coeff, |
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; const int16_t const * data, |
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; const uint32_t quant, |
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; const uint32_t dcscalar); |
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; |
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;----------------------------------------------------------------------------- |
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|
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ALIGN 16 |
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quant_mpeg_intra_mmx: |
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|
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push ecx |
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push esi |
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push edi |
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|
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mov edi, [esp + 12 + 4] ; coeff |
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mov esi, [esp + 12 + 8] ; data |
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mov eax, [esp + 12 + 12] ; quant |
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|
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movq mm5, [quantd + eax * 8 - 8] ; quantd -> mm5 |
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|
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xor ecx, ecx |
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cmp al, 1 |
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jz near .q1loop |
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|
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cmp al, 2 |
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jz near .q2loop |
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|
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movq mm7, [mmx_div + eax * 8 - 8] ; multipliers[quant] -> mm7 |
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|
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ALIGN 16 |
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.loop |
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movq mm0, [esi + 8*ecx] ; mm0 = [1st] |
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movq mm3, [esi + 8*ecx + 8] ; |
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pxor mm1, mm1 ; mm1 = 0 |
| 184 |
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pxor mm4, mm4 |
| 185 |
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pcmpgtw mm1, mm0 ; mm1 = (0 > mm0) |
| 186 |
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pcmpgtw mm4, mm3 |
| 187 |
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pxor mm0, mm1 ; mm0 = |mm0| |
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pxor mm3, mm4 ; |
| 189 |
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psubw mm0, mm1 ; displace |
| 190 |
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psubw mm3, mm4 ; |
| 191 |
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psllw mm0, 4 ; level << 4 |
| 192 |
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psllw mm3, 4 |
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movq mm2, [intra_matrix + 8*ecx] |
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psrlw mm2, 1 ; intra_matrix[i]>>1 |
| 195 |
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paddw mm0, mm2 |
| 196 |
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movq mm2, [intra_matrix_fix + ecx*8] |
| 197 |
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pmulhw mm0, mm2 ; (level<<4 + intra_matrix[i]>>1) / intra_matrix[i] |
| 198 |
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movq mm2, [intra_matrix + 8*ecx + 8] |
| 199 |
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psrlw mm2, 1 |
| 200 |
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paddw mm3, mm2 |
| 201 |
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movq mm2, [intra_matrix_fix + ecx*8 + 8] |
| 202 |
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pmulhw mm3, mm2 |
| 203 |
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paddw mm0, mm5 ; + quantd |
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paddw mm3, mm5 |
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pmulhw mm0, mm7 ; mm0 = (mm0 / 2Q) >> 16 |
| 206 |
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pmulhw mm3, mm7 ; |
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psrlw mm0, 1 ; additional shift by 1 => 16 + 1 = 17 |
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psrlw mm3, 1 |
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pxor mm0, mm1 ; mm0 *= sign(mm0) |
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pxor mm3, mm4 ; |
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psubw mm0, mm1 ; undisplace |
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psubw mm3, mm4 ; |
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|
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movq [edi + 8*ecx], mm0 |
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movq [edi + 8*ecx + 8], mm3 |
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|
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add ecx,2 |
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cmp ecx,16 |
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jnz near .loop |
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|
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.done |
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; caclulate data[0] // (int32_t)dcscalar) |
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mov ecx, [esp + 12 + 16] ; dcscalar |
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mov edx, ecx |
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movsx eax, word [esi] ; data[0] |
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shr edx, 1 ; edx = dcscalar /2 |
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cmp eax, 0 |
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jg .gtzero |
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|
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sub eax, edx |
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jmp short .mul |
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.gtzero |
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add eax, edx |
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.mul |
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cdq ; expand eax -> edx:eax |
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idiv ecx ; eax = edx:eax / dcscalar |
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|
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mov [edi], ax ; coeff[0] = ax |
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|
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pop edi |
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pop esi |
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pop ecx |
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|
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xor eax, eax ; return(0); |
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ret |
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|
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ALIGN 16 |
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.q1loop |
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movq mm0, [esi + 8*ecx] ; mm0 = [1st] |
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movq mm3, [esi + 8*ecx + 8] ; |
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pxor mm1, mm1 ; mm1 = 0 |
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pxor mm4, mm4 ; |
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pcmpgtw mm1, mm0 ; mm1 = (0 > mm0) |
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pcmpgtw mm4, mm3 ; |
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pxor mm0, mm1 ; mm0 = |mm0| |
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pxor mm3, mm4 ; |
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psubw mm0, mm1 ; displace |
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psubw mm3, mm4 ; |
| 259 |
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psllw mm0, 4 |
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psllw mm3, 4 |
| 261 |
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movq mm2, [intra_matrix + 8*ecx] |
| 262 |
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psrlw mm2, 1 |
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paddw mm0, mm2 |
| 264 |
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movq mm2, [intra_matrix_fix + ecx*8] |
| 265 |
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pmulhw mm0, mm2 ; (level<<4 + intra_matrix[i]>>1) / intra_matrix[i] |
| 266 |
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movq mm2, [intra_matrix + 8*ecx + 8] |
| 267 |
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psrlw mm2, 1 |
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paddw mm3, mm2 |
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movq mm2, [intra_matrix_fix + ecx*8 + 8] |
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pmulhw mm3, mm2 |
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paddw mm0, mm5 |
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paddw mm3, mm5 |
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psrlw mm0, 1 ; mm0 >>= 1 (/2) |
| 274 |
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psrlw mm3, 1 ; |
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pxor mm0, mm1 ; mm0 *= sign(mm0) |
| 276 |
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pxor mm3, mm4 ; |
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psubw mm0, mm1 ; undisplace |
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psubw mm3, mm4 ; |
| 279 |
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movq [edi + 8*ecx], mm0 |
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movq [edi + 8*ecx + 8], mm3 |
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|
| 282 |
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add ecx, 2 |
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cmp ecx, 16 |
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jnz near .q1loop |
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jmp near .done |
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|
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|
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ALIGN 16 |
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.q2loop |
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movq mm0, [esi + 8*ecx] ; mm0 = [1st] |
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movq mm3, [esi + 8*ecx + 8] ; |
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pxor mm1, mm1 ; mm1 = 0 |
| 293 |
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pxor mm4, mm4 ; |
| 294 |
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pcmpgtw mm1, mm0 ; mm1 = (0 > mm0) |
| 295 |
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pcmpgtw mm4, mm3 ; |
| 296 |
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pxor mm0, mm1 ; mm0 = |mm0| |
| 297 |
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pxor mm3, mm4 ; |
| 298 |
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psubw mm0, mm1 ; displace |
| 299 |
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psubw mm3, mm4 ; |
| 300 |
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psllw mm0, 4 |
| 301 |
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psllw mm3, 4 |
| 302 |
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movq mm2, [intra_matrix + 8*ecx] |
| 303 |
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psrlw mm2, 1 |
| 304 |
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paddw mm0, mm2 |
| 305 |
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movq mm2, [intra_matrix_fix + ecx*8] |
| 306 |
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pmulhw mm0, mm2 ; (level<<4 + intra_matrix[i]>>1) / intra_matrix[i] |
| 307 |
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movq mm2, [intra_matrix + 8*ecx + 8] |
| 308 |
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psrlw mm2, 1 |
| 309 |
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paddw mm3, mm2 |
| 310 |
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movq mm2, [intra_matrix_fix + ecx*8 + 8] |
| 311 |
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pmulhw mm3, mm2 |
| 312 |
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paddw mm0, mm5 |
| 313 |
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paddw mm3, mm5 |
| 314 |
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psrlw mm0, 2 ; mm0 >>= 1 (/4) |
| 315 |
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psrlw mm3, 2 ; |
| 316 |
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pxor mm0, mm1 ; mm0 *= sign(mm0) |
| 317 |
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pxor mm3, mm4 ; |
| 318 |
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psubw mm0, mm1 ; undisplace |
| 319 |
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psubw mm3, mm4 ; |
| 320 |
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movq [edi + 8*ecx], mm0 |
| 321 |
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movq [edi + 8*ecx + 8], mm3 |
| 322 |
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|
| 323 |
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add ecx,2 |
| 324 |
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cmp ecx,16 |
| 325 |
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jnz near .q2loop |
| 326 |
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jmp near .done |
| 327 |
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|
| 328 |
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|
| 329 |
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;----------------------------------------------------------------------------- |
| 330 |
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; |
| 331 |
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; uint32_t quant_mpeg_inter_mmx(int16_t * coeff, |
| 332 |
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; const int16_t const * data, |
| 333 |
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; const uint32_t quant); |
| 334 |
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; |
| 335 |
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;----------------------------------------------------------------------------- |
| 336 |
|
|
| 337 |
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ALIGN 16 |
| 338 |
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quant_mpeg_inter_mmx: |
| 339 |
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|
| 340 |
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push ecx |
| 341 |
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push esi |
| 342 |
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push edi |
| 343 |
|
|
| 344 |
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mov edi, [esp + 12 + 4] ; coeff |
| 345 |
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mov esi, [esp + 12 + 8] ; data |
| 346 |
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mov eax, [esp + 12 + 12] ; quant |
| 347 |
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|
| 348 |
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xor ecx, ecx |
| 349 |
|
|
| 350 |
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pxor mm5, mm5 ; sum |
| 351 |
|
|
| 352 |
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cmp al, 1 |
| 353 |
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jz near .q1loop |
| 354 |
|
|
| 355 |
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cmp al, 2 |
| 356 |
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jz near .q2loop |
| 357 |
|
|
| 358 |
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movq mm7, [mmx_div + eax * 8 - 8] ; divider |
| 359 |
|
|
| 360 |
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ALIGN 16 |
| 361 |
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.loop |
| 362 |
|
movq mm0, [esi + 8*ecx] ; mm0 = [1st] |
| 363 |
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movq mm3, [esi + 8*ecx + 8] ; |
| 364 |
|
pxor mm1, mm1 ; mm1 = 0 |
| 365 |
|
pxor mm4, mm4 ; |
| 366 |
|
pcmpgtw mm1, mm0 ; mm1 = (0 > mm0) |
| 367 |
|
pcmpgtw mm4, mm3 ; |
| 368 |
|
pxor mm0, mm1 ; mm0 = |mm0| |
| 369 |
|
pxor mm3, mm4 ; |
| 370 |
|
psubw mm0, mm1 ; displace |
| 371 |
|
psubw mm3, mm4 ; |
| 372 |
|
psllw mm0, 4 |
| 373 |
|
psllw mm3, 4 |
| 374 |
|
movq mm2, [inter_matrix + 8*ecx] |
| 375 |
|
psrlw mm2, 1 |
| 376 |
|
paddw mm0, mm2 |
| 377 |
|
movq mm2, [inter_matrix_fix + ecx*8] |
| 378 |
|
pmulhw mm0, mm2 ; (level<<4 + inter_matrix[i]>>1) / inter_matrix[i] |
| 379 |
|
movq mm2, [inter_matrix + 8*ecx + 8] |
| 380 |
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psrlw mm2, 1 |
| 381 |
|
paddw mm3, mm2 |
| 382 |
|
movq mm2, [inter_matrix_fix + ecx*8 + 8] |
| 383 |
|
pmulhw mm3, mm2 |
| 384 |
|
pmulhw mm0, mm7 ; mm0 = (mm0 / 2Q) >> 16 |
| 385 |
|
pmulhw mm3, mm7 ; |
| 386 |
|
psrlw mm0, 1 ; additional shift by 1 => 16 + 1 = 17 |
| 387 |
|
psrlw mm3, 1 |
| 388 |
|
paddw mm5, mm0 ; sum += mm0 |
| 389 |
|
pxor mm0, mm1 ; mm0 *= sign(mm0) |
| 390 |
|
paddw mm5, mm3 ; |
| 391 |
|
pxor mm3, mm4 ; |
| 392 |
|
psubw mm0, mm1 ; undisplace |
| 393 |
|
psubw mm3, mm4 |
| 394 |
|
movq [edi + 8*ecx], mm0 |
| 395 |
|
movq [edi + 8*ecx + 8], mm3 |
| 396 |
|
|
| 397 |
|
add ecx, 2 |
| 398 |
|
cmp ecx, 16 |
| 399 |
|
jnz near .loop |
| 400 |
|
|
| 401 |
|
.done |
| 402 |
|
pmaddwd mm5, [mmx_one] |
| 403 |
|
movq mm0, mm5 |
| 404 |
|
psrlq mm5, 32 |
| 405 |
|
paddd mm0, mm5 |
| 406 |
|
movd eax, mm0 ; return sum |
| 407 |
|
|
| 408 |
|
pop edi |
| 409 |
|
pop esi |
| 410 |
|
pop ecx |
| 411 |
|
|
| 412 |
|
ret |
| 413 |
|
|
| 414 |
|
ALIGN 16 |
| 415 |
|
.q1loop |
| 416 |
|
movq mm0, [esi + 8*ecx] ; mm0 = [1st] |
| 417 |
|
movq mm3, [esi + 8*ecx+ 8] |
| 418 |
|
pxor mm1, mm1 ; mm1 = 0 |
| 419 |
|
pxor mm4, mm4 ; |
| 420 |
|
pcmpgtw mm1, mm0 ; mm1 = (0 > mm0) |
| 421 |
|
pcmpgtw mm4, mm3 ; |
| 422 |
|
pxor mm0, mm1 ; mm0 = |mm0| |
| 423 |
|
pxor mm3, mm4 ; |
| 424 |
|
psubw mm0, mm1 ; displace |
| 425 |
|
psubw mm3, mm4 ; |
| 426 |
|
psllw mm0, 4 |
| 427 |
|
psllw mm3, 4 |
| 428 |
|
movq mm2, [inter_matrix + 8*ecx] |
| 429 |
|
psrlw mm2, 1 |
| 430 |
|
paddw mm0, mm2 |
| 431 |
|
movq mm2, [inter_matrix_fix + ecx*8] |
| 432 |
|
pmulhw mm0, mm2 ; (level<<4 + inter_matrix[i]>>1) / inter_matrix[i] |
| 433 |
|
movq mm2, [inter_matrix + 8*ecx + 8] |
| 434 |
|
psrlw mm2, 1 |
| 435 |
|
paddw mm3, mm2 |
| 436 |
|
movq mm2, [inter_matrix_fix + ecx*8 + 8] |
| 437 |
|
pmulhw mm3, mm2 |
| 438 |
|
psrlw mm0, 1 ; mm0 >>= 1 (/2) |
| 439 |
|
psrlw mm3, 1 ; |
| 440 |
|
paddw mm5, mm0 ; sum += mm0 |
| 441 |
|
pxor mm0, mm1 ; mm0 *= sign(mm0) |
| 442 |
|
paddw mm5, mm3 ; |
| 443 |
|
pxor mm3, mm4 ; |
| 444 |
|
psubw mm0, mm1 ; undisplace |
| 445 |
|
psubw mm3, mm4 |
| 446 |
|
movq [edi + 8*ecx], mm0 |
| 447 |
|
movq [edi + 8*ecx + 8], mm3 |
| 448 |
|
|
| 449 |
|
add ecx, 2 |
| 450 |
|
cmp ecx, 16 |
| 451 |
|
jnz near .q1loop |
| 452 |
|
|
| 453 |
|
jmp .done |
| 454 |
|
|
| 455 |
|
|
| 456 |
|
ALIGN 16 |
| 457 |
|
.q2loop |
| 458 |
|
movq mm0, [esi + 8*ecx] ; mm0 = [1st] |
| 459 |
|
movq mm3, [esi + 8*ecx+ 8] |
| 460 |
|
pxor mm1, mm1 ; mm1 = 0 |
| 461 |
|
pxor mm4, mm4 ; |
| 462 |
|
pcmpgtw mm1, mm0 ; mm1 = (0 > mm0) |
| 463 |
|
pcmpgtw mm4, mm3 ; |
| 464 |
|
pxor mm0, mm1 ; mm0 = |mm0| |
| 465 |
|
pxor mm3, mm4 ; |
| 466 |
|
psubw mm0, mm1 ; displace |
| 467 |
|
psubw mm3, mm4 ; |
| 468 |
|
psllw mm0, 4 |
| 469 |
|
psllw mm3, 4 |
| 470 |
|
movq mm2, [inter_matrix + 8*ecx] |
| 471 |
|
psrlw mm2, 1 |
| 472 |
|
paddw mm0, mm2 |
| 473 |
|
movq mm2, [inter_matrix_fix + ecx*8] |
| 474 |
|
pmulhw mm0, mm2 ; (level<<4 + inter_matrix[i]>>1) / inter_matrix[i] |
| 475 |
|
movq mm2, [inter_matrix + 8*ecx + 8] |
| 476 |
|
psrlw mm2, 1 |
| 477 |
|
paddw mm3, mm2 |
| 478 |
|
movq mm2, [inter_matrix_fix + ecx*8 + 8] |
| 479 |
|
pmulhw mm3, mm2 |
| 480 |
|
psrlw mm0, 2 ; mm0 >>= 1 (/2) |
| 481 |
|
psrlw mm3, 2 ; |
| 482 |
|
paddw mm5, mm0 ; sum += mm0 |
| 483 |
|
pxor mm0, mm1 ; mm0 *= sign(mm0) |
| 484 |
|
paddw mm5, mm3 ; |
| 485 |
|
pxor mm3, mm4 ; |
| 486 |
|
psubw mm0, mm1 ; undisplace |
| 487 |
|
psubw mm3, mm4 |
| 488 |
|
movq [edi + 8*ecx], mm0 |
| 489 |
|
movq [edi + 8*ecx + 8], mm3 |
| 490 |
|
|
| 491 |
|
add ecx, 2 |
| 492 |
|
cmp ecx, 16 |
| 493 |
|
jnz near .q2loop |
| 494 |
|
|
| 495 |
|
jmp .done |
| 496 |
|
|
| 497 |
|
|
| 498 |
|
;----------------------------------------------------------------------------- |
| 499 |
|
; |
| 500 |
|
; uint32_t dequant_mpeg_intra_mmx(int16_t *data, |
| 501 |
|
; const int16_t const *coeff, |
| 502 |
|
; const uint32_t quant, |
| 503 |
|
; const uint32_t dcscalar); |
| 504 |
|
; |
| 505 |
|
;----------------------------------------------------------------------------- |
| 506 |
|
|
| 507 |
|
; Note: in order to saturate 'easily', we pre-shift the quantifier |
| 508 |
|
; by 4. Then, the high-word of (coeff[]*matrix[i]*quant) are used to |
| 509 |
|
; build a saturating mask. It is non-zero only when an overflow occured. |
| 510 |
|
; We thus avoid packing/unpacking toward double-word. |
| 511 |
|
; Moreover, we perform the mult (matrix[i]*quant) first, instead of, e.g., |
| 512 |
|
; (coeff[i]*matrix[i]). This is less prone to overflow if coeff[] are not |
| 513 |
|
; checked. Input ranges are: coeff in [-127,127], inter_matrix in [1..255],a |
| 514 |
|
; and quant in [1..31]. |
| 515 |
|
; |
| 516 |
|
; The original loop is: |
| 517 |
|
; |
| 518 |
|
%if 0 |
| 519 |
|
movq mm0, [ecx+8*eax + 8*16] ; mm0 = coeff[i] |
| 520 |
|
pxor mm1, mm1 |
| 521 |
|
pcmpgtw mm1, mm0 |
| 522 |
|
pxor mm0, mm1 ; change sign if negative |
| 523 |
|
psubw mm0, mm1 ; -> mm0 = abs(coeff[i]), mm1 = sign of coeff[i] |
| 524 |
|
|
| 525 |
|
movq mm2, mm7 ; mm2 = quant |
| 526 |
|
pmullw mm2, [intra_matrix + 8*eax + 8*16 ] ; matrix[i]*quant. |
| 527 |
|
|
| 528 |
|
movq mm6, mm2 |
| 529 |
|
pmulhw mm2, mm0 ; high of coeff*(matrix*quant) (should be 0 if no overflow) |
| 530 |
|
pmullw mm0, mm6 ; low of coeff*(matrix*quant) |
| 531 |
|
|
| 532 |
|
pxor mm5, mm5 |
| 533 |
|
pcmpgtw mm2, mm5 ; otherflow? |
| 534 |
|
psrlw mm2, 5 ; =0 if no clamp, 2047 otherwise |
| 535 |
|
psrlw mm0, 5 |
| 536 |
|
paddw mm0, mm1 ; start restoring sign |
| 537 |
|
por mm0, mm2 ; saturate to 2047 if needed |
| 538 |
|
pxor mm0, mm1 ; finish negating back |
| 539 |
|
|
| 540 |
|
movq [edx + 8*eax + 8*16], mm0 ; data[i] |
| 541 |
|
add eax, 1 |
| 542 |
|
%endif |
| 543 |
|
|
| 544 |
|
;******************************************************************** |
| 545 |
|
|
| 546 |
|
ALIGN 16 |
| 547 |
|
dequant_mpeg_intra_mmx: |
| 548 |
|
|
| 549 |
|
mov edx, [esp+4] ; data |
| 550 |
|
mov ecx, [esp+8] ; coeff |
| 551 |
|
mov eax, [esp+12] ; quant |
| 552 |
|
|
| 553 |
|
movq mm7, [mmx_mul_quant + eax*8 - 8] |
| 554 |
|
mov eax, -16 ; to keep ALIGNed, we regularly process coeff[0] |
| 555 |
|
psllw mm7, 2 ; << 2. See comment. |
| 556 |
|
pxor mm6, mm6 ; this is a NOP |
| 557 |
|
|
| 558 |
|
ALIGN 16 |
| 559 |
|
.loop |
| 560 |
|
movq mm0, [ecx+8*eax + 8*16] ; mm0 = c = coeff[i] |
| 561 |
|
movq mm3, [ecx+8*eax + 8*16 +8]; mm3 = c' = coeff[i+1] |
| 562 |
|
pxor mm1, mm1 |
| 563 |
|
pxor mm4, mm4 |
| 564 |
|
pcmpgtw mm1, mm0 ; mm1 = sgn(c) |
| 565 |
|
movq mm2, mm7 ; mm2 = quant |
| 566 |
|
|
| 567 |
|
pcmpgtw mm4, mm3 ; mm4 = sgn(c') |
| 568 |
|
pmullw mm2, [intra_matrix + 8*eax + 8*16 ] ; matrix[i]*quant |
| 569 |
|
|
| 570 |
|
pxor mm0, mm1 ; negate if negative |
| 571 |
|
pxor mm3, mm4 ; negate if negative |
| 572 |
|
|
| 573 |
|
psubw mm0, mm1 |
| 574 |
|
psubw mm3, mm4 |
| 575 |
|
|
| 576 |
|
; we're short on register, here. Poor pairing... |
| 577 |
|
|
| 578 |
|
movq mm5, mm2 |
| 579 |
|
pmullw mm2, mm0 ; low of coeff*(matrix*quant) |
| 580 |
|
|
| 581 |
|
pmulhw mm0, mm5 ; high of coeff*(matrix*quant) |
| 582 |
|
movq mm5, mm7 ; mm2 = quant |
| 583 |
|
|
| 584 |
|
pmullw mm5, [intra_matrix + 8*eax + 8*16 +8] ; matrix[i+1]*quant |
| 585 |
|
|
| 586 |
|
movq mm6, mm5 |
| 587 |
|
add eax,2 ; z-flag will be tested later |
| 588 |
|
|
| 589 |
|
pmullw mm6, mm3 ; low of coeff*(matrix*quant) |
| 590 |
|
pmulhw mm3, mm5 ; high of coeff*(matrix*quant) |
| 591 |
|
|
| 592 |
|
pcmpgtw mm0, [zero] |
| 593 |
|
paddusw mm2, mm0 |
| 594 |
|
psrlw mm2, 5 |
| 595 |
|
|
| 596 |
|
pcmpgtw mm3, [zero] |
| 597 |
|
paddusw mm6, mm3 |
| 598 |
|
psrlw mm6, 5 |
| 599 |
|
|
| 600 |
|
pxor mm2, mm1 ; start negating back |
| 601 |
|
pxor mm6, mm4 ; start negating back |
| 602 |
|
|
| 603 |
|
psubusw mm1, mm0 |
| 604 |
|
psubusw mm4, mm3 |
| 605 |
|
|
| 606 |
|
psubw mm2, mm1 ; finish negating back |
| 607 |
|
psubw mm6, mm4 ; finish negating back |
| 608 |
|
|
| 609 |
|
movq [edx + 8*eax + 8*16 -2*8 ], mm2 ; data[i] |
| 610 |
|
movq [edx + 8*eax + 8*16 -2*8 +8], mm6 ; data[i+1] |
| 611 |
|
|
| 612 |
|
jnz near .loop |
| 613 |
|
|
| 614 |
|
; deal with DC |
| 615 |
|
movd mm0, [ecx] |
| 616 |
|
pmullw mm0, [esp+16] ; dcscalar |
| 617 |
|
movq mm2, [mmx_32767_minus_2047] |
| 618 |
|
paddsw mm0, mm2 |
| 619 |
|
psubsw mm0, mm2 |
| 620 |
|
movq mm2, [mmx_32768_minus_2048] |
| 621 |
|
psubsw mm0, mm2 |
| 622 |
|
paddsw mm0, mm2 |
| 623 |
|
movd eax, mm0 |
| 624 |
|
mov [edx], ax |
| 625 |
|
|
| 626 |
|
xor eax, eax |
| 627 |
|
ret |
| 628 |
|
|
| 629 |
|
;----------------------------------------------------------------------------- |
| 630 |
|
; |
| 631 |
|
; uint32_t dequant_mpeg_inter_mmx(int16_t * data, |
| 632 |
|
; const int16_t * const coeff, |
| 633 |
|
; const uint32_t quant); |
| 634 |
|
; |
| 635 |
|
;----------------------------------------------------------------------------- |
| 636 |
|
|
| 637 |
|
; Note: We use (2*c + sgn(c) - sgn(-c)) as multiplier |
| 638 |
|
; so we handle the 3 cases: c<0, c==0, and c>0 in one shot. |
| 639 |
|
; sgn(x) is the result of 'pcmpgtw 0,x': 0 if x>=0, -1 if x<0. |
| 640 |
|
; It's mixed with the extraction of the absolute value. |
| 641 |
|
|
| 642 |
|
ALIGN 16 |
| 643 |
|
dequant_mpeg_inter_mmx: |
| 644 |
|
|
| 645 |
|
mov edx, [esp+ 4] ; data |
| 646 |
|
mov ecx, [esp+ 8] ; coeff |
| 647 |
|
mov eax, [esp+12] ; quant |
| 648 |
|
movq mm7, [mmx_mul_quant + eax*8 - 8] |
| 649 |
|
mov eax, -16 |
| 650 |
|
paddw mm7, mm7 ; << 1 |
| 651 |
|
pxor mm6, mm6 ; mismatch sum |
| 652 |
|
|
| 653 |
|
ALIGN 16 |
| 654 |
|
.loop |
| 655 |
|
movq mm0, [ecx+8*eax + 8*16 ] ; mm0 = coeff[i] |
| 656 |
|
movq mm2, [ecx+8*eax + 8*16 +8] ; mm2 = coeff[i+1] |
| 657 |
|
add eax, 2 |
| 658 |
|
|
| 659 |
|
pxor mm1, mm1 |
| 660 |
|
pxor mm3, mm3 |
| 661 |
|
pcmpgtw mm1, mm0 ; mm1 = sgn(c) (preserved) |
| 662 |
|
pcmpgtw mm3, mm2 ; mm3 = sgn(c') (preserved) |
| 663 |
|
paddsw mm0, mm1 ; c += sgn(c) |
| 664 |
|
paddsw mm2, mm3 ; c += sgn(c') |
| 665 |
|
paddw mm0, mm0 ; c *= 2 |
| 666 |
|
paddw mm2, mm2 ; c'*= 2 |
| 667 |
|
|
| 668 |
|
pxor mm4, mm4 |
| 669 |
|
pxor mm5, mm5 |
| 670 |
|
psubw mm4, mm0 ; -c |
| 671 |
|
psubw mm5, mm2 ; -c' |
| 672 |
|
psraw mm4, 16 ; mm4 = sgn(-c) |
| 673 |
|
psraw mm5, 16 ; mm5 = sgn(-c') |
| 674 |
|
psubsw mm0, mm4 ; c -= sgn(-c) |
| 675 |
|
psubsw mm2, mm5 ; c' -= sgn(-c') |
| 676 |
|
pxor mm0, mm1 ; finish changing sign if needed |
| 677 |
|
pxor mm2, mm3 ; finish changing sign if needed |
| 678 |
|
|
| 679 |
|
; we're short on register, here. Poor pairing... |
| 680 |
|
|
| 681 |
|
movq mm4, mm7 ; (matrix*quant) |
| 682 |
|
pmullw mm4, [inter_matrix + 8*eax + 8*16 -2*8] |
| 683 |
|
movq mm5, mm4 |
| 684 |
|
pmulhw mm5, mm0 ; high of c*(matrix*quant) |
| 685 |
|
pmullw mm0, mm4 ; low of c*(matrix*quant) |
| 686 |
|
|
| 687 |
|
movq mm4, mm7 ; (matrix*quant) |
| 688 |
|
pmullw mm4, [inter_matrix + 8*eax + 8*16 -2*8 + 8] |
| 689 |
|
|
| 690 |
|
pcmpgtw mm5, [zero] |
| 691 |
|
paddusw mm0, mm5 |
| 692 |
|
psrlw mm0, 5 |
| 693 |
|
pxor mm0, mm1 ; start restoring sign |
| 694 |
|
psubusw mm1, mm5 |
| 695 |
|
|
| 696 |
|
movq mm5, mm4 |
| 697 |
|
pmulhw mm5, mm2 ; high of c*(matrix*quant) |
| 698 |
|
pmullw mm2, mm4 ; low of c*(matrix*quant) |
| 699 |
|
psubw mm0, mm1 ; finish restoring sign |
| 700 |
|
|
| 701 |
|
pcmpgtw mm5, [zero] |
| 702 |
|
paddusw mm2, mm5 |
| 703 |
|
psrlw mm2, 5 |
| 704 |
|
pxor mm2, mm3 ; start restoring sign |
| 705 |
|
psubusw mm3, mm5 |
| 706 |
|
psubw mm2, mm3 ; finish restoring sign |
| 707 |
|
|
| 708 |
|
pxor mm6, mm0 ; mismatch control |
| 709 |
|
movq [edx + 8*eax + 8*16 -2*8 ], mm0 ; data[i] |
| 710 |
|
pxor mm6, mm2 ; mismatch control |
| 711 |
|
movq [edx + 8*eax + 8*16 -2*8 +8], mm2 ; data[i+1] |
| 712 |
|
|
| 713 |
|
jnz near .loop |
| 714 |
|
|
| 715 |
|
; mismatch control |
| 716 |
|
|
| 717 |
|
movq mm0, mm6 |
| 718 |
|
psrlq mm0, 48 |
| 719 |
|
movq mm1, mm6 |
| 720 |
|
movq mm2, mm6 |
| 721 |
|
psrlq mm1, 32 |
| 722 |
|
pxor mm6, mm0 |
| 723 |
|
psrlq mm2, 16 |
| 724 |
|
pxor mm6, mm1 |
| 725 |
|
pxor mm6, mm2 |
| 726 |
|
movd eax, mm6 |
| 727 |
|
and eax, 1 |
| 728 |
|
xor eax, 1 |
| 729 |
|
xor word [edx + 2*63], ax |
| 730 |
|
|
| 731 |
|
xor eax, eax |
| 732 |
|
ret |
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