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Updated assembly functions to match new API -- more to come when matrices will be part of the function parameters
;/***************************************************************************** ; * ; * XVID MPEG-4 VIDEO CODEC ; * - MPEG4 Quantization H263 implementation / MMX optimized - ; * ; * Copyright(C) 2001-2003 Peter Ross <pross@xvid.org> ; * 2002-2003 Pascal Massimino <skal@planet-d.net> ; * ; * This program is free software ; you can redistribute it and/or modify ; * it under the terms of the GNU General Public License as published by ; * the Free Software Foundation ; either version 2 of the License, or ; * (at your option) any later version. ; * ; * This program is distributed in the hope that it will be useful, ; * but WITHOUT ANY WARRANTY ; without even the implied warranty of ; * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ; * GNU General Public License for more details. ; * ; * You should have received a copy of the GNU General Public License ; * along with this program ; if not, write to the Free Software ; * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA ; * ; * $Id: quantize_h263_mmx.asm,v 1.1.2.2 2003-10-09 18:50:22 edgomez Exp $ ; * ; ****************************************************************************/ ; enable dequant saturate [-2048,2047], test purposes only. %define SATURATE ; data/text alignment %define ALIGN 8 bits 32 %macro cglobal 1 %ifdef PREFIX global _%1 %define %1 _%1 %else global %1 %endif %endmacro ;*************************************************************************** ; Local data ;*************************************************************************** %ifdef FORMAT_COFF section .data data %else section .data data align=16 %endif align 16 plus_one: times 8 dw 1 ;=========================================================================== ; ; subtract by Q/2 table ; ;=========================================================================== align 16 mmx_sub: %assign quant 1 %rep 31 times 4 dw quant / 2 %assign quant quant+1 %endrep ;=========================================================================== ; ; divide by 2Q table ; ; use a shift of 16 to take full advantage of _pmulhw_ ; for q=1, _pmulhw_ will overflow so it is treated seperately ; (3dnow2 provides _pmulhuw_ which wont cause overflow) ; ;=========================================================================== align 16 mmx_div: %assign quant 1 %rep 31 times 4 dw (1<<16) / (quant*2) + 1 %assign quant quant+1 %endrep ;=========================================================================== ; ; add by (odd(Q) ? Q : Q - 1) table ; ;=========================================================================== align 16 mmx_add: %assign quant 1 %rep 31 %if quant % 2 != 0 times 4 dw quant %else times 4 dw quant - 1 %endif %assign quant quant+1 %endrep ;=========================================================================== ; ; multiple by 2Q table ; ;=========================================================================== align 16 mmx_mul: %assign quant 1 %rep 31 times 4 dw quant*2 %assign quant quant+1 %endrep ;=========================================================================== ; ; saturation limits ; ;=========================================================================== align 16 sse2_2047: times 8 dw 2047 align 16 mmx_2047: times 4 dw 2047 align 8 mmx_32768_minus_2048: times 4 dw (32768-2048) mmx_32767_minus_2047: times 4 dw (32767-2047) ;*************************************************************************** ; Code ;*************************************************************************** section .text ;=========================================================================== ; ; uint32_t quant_h263_intra_mmx(int16_t * coeff, ; const int16_t const * data, ; const uint32_t quant, ; const uint32_t dcscalar); ; ;=========================================================================== align ALIGN cglobal quant_h263_intra_mmx quant_h263_intra_mmx: push ecx push esi push edi mov edi, [esp + 12 + 4] ; coeff mov esi, [esp + 12 + 8] ; data mov eax, [esp + 12 + 12] ; quant xor ecx, ecx cmp al, 1 jz .q1loop movq mm7, [mmx_div + eax * 8 - 8] align ALIGN .loop movq mm0, [esi + 8*ecx] ; mm0 = [1st] movq mm3, [esi + 8*ecx + 8] pxor mm1, mm1 ; mm1 = 0 pxor mm4, mm4 ; pcmpgtw mm1, mm0 ; mm1 = (0 > mm0) pcmpgtw mm4, mm3 ; pxor mm0, mm1 ; mm0 = |mm0| pxor mm3, mm4 ; psubw mm0, mm1 ; displace psubw mm3, mm4 ; pmulhw mm0, mm7 ; mm0 = (mm0 / 2Q) >> 16 pmulhw mm3, mm7 ; pxor mm0, mm1 ; mm0 *= sign(mm0) pxor mm3, mm4 ; psubw mm0, mm1 ; undisplace psubw mm3, mm4 ; movq [edi + 8*ecx], mm0 movq [edi + 8*ecx + 8], mm3 add ecx, 2 cmp ecx, 16 jnz .loop .done ; caclulate data[0] // (int32_t)dcscalar) mov ecx, [esp + 12 + 16] ; dcscalar mov edx, ecx movsx eax, word [esi] ; data[0] shr edx, 1 ; edx = dcscalar /2 cmp eax, 0 jg .gtzero sub eax, edx jmp short .mul .gtzero add eax, edx .mul cdq ; expand eax -> edx:eax idiv ecx ; eax = edx:eax / dcscalar mov [edi], ax ; coeff[0] = ax xor eax, eax ; return(0); pop edi pop esi pop ecx ret align ALIGN .q1loop movq mm0, [esi + 8*ecx] ; mm0 = [1st] movq mm3, [esi + 8*ecx + 8] pxor mm1, mm1 ; mm1 = 0 pxor mm4, mm4 ; pcmpgtw mm1, mm0 ; mm1 = (0 > mm0) pcmpgtw mm4, mm3 ; pxor mm0, mm1 ; mm0 = |mm0| pxor mm3, mm4 ; psubw mm0, mm1 ; displace psubw mm3, mm4 ; psrlw mm0, 1 ; mm0 >>= 1 (/2) psrlw mm3, 1 ; pxor mm0, mm1 ; mm0 *= sign(mm0) pxor mm3, mm4 psubw mm0, mm1 ; undisplace psubw mm3, mm4 ; movq [edi + 8*ecx], mm0 movq [edi + 8*ecx + 8], mm3 add ecx, 2 cmp ecx, 16 jnz .q1loop jmp short .done ;=========================================================================== ; ; uint32_t quant_h263_intra_sse2(int16_t * coeff, ; const int16_t const * data, ; const uint32_t quant, ; const uint32_t dcscalar); ; ;=========================================================================== align ALIGN cglobal quant_h263_intra_sse2 quant_h263_intra_sse2: push esi push edi mov edi, [esp + 8 + 4] ; coeff mov esi, [esp + 8 + 8] ; data mov eax, [esp + 8 + 12] ; quant xor ecx, ecx cmp al, 1 jz near .qas2_q1loop .qas2_not1 movq mm7, [mmx_div + eax*8 - 8] movq2dq xmm7, mm7 movlhps xmm7, xmm7 align 16 .qas2_loop movdqa xmm0, [esi + ecx*8] ; xmm0 = [1st] movdqa xmm3, [esi + ecx*8 + 16] ; xmm3 = [2nd] pxor xmm1, xmm1 pxor xmm4, xmm4 pcmpgtw xmm1, xmm0 pcmpgtw xmm4, xmm3 pxor xmm0, xmm1 pxor xmm3, xmm4 psubw xmm0, xmm1 psubw xmm3, xmm4 pmulhw xmm0, xmm7 pmulhw xmm3, xmm7 pxor xmm0, xmm1 pxor xmm3, xmm4 psubw xmm0, xmm1 psubw xmm3, xmm4 movdqa [edi + ecx*8], xmm0 movdqa [edi + ecx*8 + 16], xmm3 add ecx, 4 cmp ecx, 16 jnz .qas2_loop .qas2_done mov ecx, [esp + 8 + 16] ; dcscalar mov edx, ecx movsx eax, word [esi] shr edx, 1 cmp eax, 0 jg .qas2_gtzero sub eax, edx jmp short .qas2_mul .qas2_gtzero add eax, edx .qas2_mul cdq idiv ecx mov [edi], ax xor eax, eax ; return(0); pop edi pop esi ret align 16 .qas2_q1loop movdqa xmm0, [esi + ecx*8] ; xmm0 = [1st] movdqa xmm3, [esi + ecx*8 + 16] ; xmm3 = [2nd] pxor xmm1, xmm1 pxor xmm4, xmm4 pcmpgtw xmm1, xmm0 pcmpgtw xmm4, xmm3 pxor xmm0, xmm1 pxor xmm3, xmm4 psubw xmm0, xmm1 psubw xmm3, xmm4 psrlw xmm0, 1 psrlw xmm3, 1 pxor xmm0, xmm1 pxor xmm3, xmm4 psubw xmm0, xmm1 psubw xmm3, xmm4 movdqa [edi + ecx*8], xmm0 movdqa [edi + ecx*8 + 16], xmm3 add ecx, 4 cmp ecx, 16 jnz .qas2_q1loop jmp near .qas2_done ;=========================================================================== ; ; uint32_t quant_h263_inter_mmx(int16_t * coeff, ; const int16_t const * data, ; const uint32_t quant); ; ;=========================================================================== align ALIGN cglobal quant_h263_inter_mmx quant_h263_inter_mmx: push ecx push esi push edi mov edi, [esp + 12 + 4] ; coeff mov esi, [esp + 12 + 8] ; data mov eax, [esp + 12 + 12] ; quant xor ecx, ecx pxor mm5, mm5 ; sum movq mm6, [mmx_sub + eax * 8 - 8]; sub cmp al, 1 jz .q1loop movq mm7, [mmx_div + eax * 8 - 8] ; divider align ALIGN .loop movq mm0, [esi + 8*ecx] ; mm0 = [1st] movq mm3, [esi + 8*ecx + 8] pxor mm1, mm1 ; mm1 = 0 pxor mm4, mm4 ; pcmpgtw mm1, mm0 ; mm1 = (0 > mm0) pcmpgtw mm4, mm3 ; pxor mm0, mm1 ; mm0 = |mm0| pxor mm3, mm4 ; psubw mm0, mm1 ; displace psubw mm3, mm4 ; psubusw mm0, mm6 ; mm0 -= sub (unsigned, dont go < 0) psubusw mm3, mm6 ; pmulhw mm0, mm7 ; mm0 = (mm0 / 2Q) >> 16 pmulhw mm3, mm7 ; paddw mm5, mm0 ; sum += mm0 pxor mm0, mm1 ; mm0 *= sign(mm0) paddw mm5, mm3 ; pxor mm3, mm4 ; psubw mm0, mm1 ; undisplace psubw mm3, mm4 movq [edi + 8*ecx], mm0 movq [edi + 8*ecx + 8], mm3 add ecx, 2 cmp ecx, 16 jnz .loop .done pmaddwd mm5, [plus_one] movq mm0, mm5 psrlq mm5, 32 paddd mm0, mm5 movd eax, mm0 ; return sum pop edi pop esi pop ecx ret align ALIGN .q1loop movq mm0, [esi + 8*ecx] ; mm0 = [1st] movq mm3, [esi + 8*ecx+ 8] ; pxor mm1, mm1 ; mm1 = 0 pxor mm4, mm4 ; pcmpgtw mm1, mm0 ; mm1 = (0 > mm0) pcmpgtw mm4, mm3 ; pxor mm0, mm1 ; mm0 = |mm0| pxor mm3, mm4 ; psubw mm0, mm1 ; displace psubw mm3, mm4 ; psubusw mm0, mm6 ; mm0 -= sub (unsigned, dont go < 0) psubusw mm3, mm6 ; psrlw mm0, 1 ; mm0 >>= 1 (/2) psrlw mm3, 1 ; paddw mm5, mm0 ; sum += mm0 pxor mm0, mm1 ; mm0 *= sign(mm0) paddw mm5, mm3 ; pxor mm3, mm4 ; psubw mm0, mm1 ; undisplace psubw mm3, mm4 movq [edi + 8*ecx], mm0 movq [edi + 8*ecx + 8], mm3 add ecx, 2 cmp ecx, 16 jnz .q1loop jmp .done ;=========================================================================== ; ; uint32_t quant_h263_inter_sse2(int16_t * coeff, ; const int16_t const * data, ; const uint32_t quant); ; ;=========================================================================== align 16 cglobal quant_h263_inter_sse2 quant_h263_inter_sse2: push esi push edi mov edi, [esp + 8 + 4] ; coeff mov esi, [esp + 8 + 8] ; data mov eax, [esp + 8 + 12] ; quant xor ecx, ecx pxor xmm5, xmm5 ; sum movq mm0, [mmx_sub + eax*8 - 8] ; sub movq2dq xmm6, mm0 ; load into low 8 bytes movlhps xmm6, xmm6 ; duplicate into high 8 bytes cmp al, 1 jz near .qes2_q1loop .qes2_not1 movq mm0, [mmx_div + eax*8 - 8] ; divider movq2dq xmm7, mm0 movlhps xmm7, xmm7 align 16 .qes2_loop movdqa xmm0, [esi + ecx*8] ; xmm0 = [1st] movdqa xmm3, [esi + ecx*8 + 16] ; xmm3 = [2nd] pxor xmm1, xmm1 pxor xmm4, xmm4 pcmpgtw xmm1, xmm0 pcmpgtw xmm4, xmm3 pxor xmm0, xmm1 pxor xmm3, xmm4 psubw xmm0, xmm1 psubw xmm3, xmm4 psubusw xmm0, xmm6 psubusw xmm3, xmm6 pmulhw xmm0, xmm7 pmulhw xmm3, xmm7 paddw xmm5, xmm0 pxor xmm0, xmm1 paddw xmm5, xmm3 pxor xmm3, xmm4 psubw xmm0, xmm1 psubw xmm3, xmm4 movdqa [edi + ecx*8], xmm0 movdqa [edi + ecx*8 + 16], xmm3 add ecx, 4 cmp ecx, 16 jnz .qes2_loop .qes2_done movdqu xmm6, [plus_one] pmaddwd xmm5, xmm6 movhlps xmm6, xmm5 paddd xmm5, xmm6 movdq2q mm0, xmm5 movq mm5, mm0 psrlq mm5, 32 paddd mm0, mm5 movd eax, mm0 ; return sum pop edi pop esi ret align 16 .qes2_q1loop movdqa xmm0, [esi + ecx*8] ; xmm0 = [1st] movdqa xmm3, [esi + ecx*8 + 16] ; xmm3 = [2nd] pxor xmm1, xmm1 pxor xmm4, xmm4 pcmpgtw xmm1, xmm0 pcmpgtw xmm4, xmm3 pxor xmm0, xmm1 pxor xmm3, xmm4 psubw xmm0, xmm1 psubw xmm3, xmm4 psubusw xmm0, xmm6 psubusw xmm3, xmm6 psrlw xmm0, 1 psrlw xmm3, 1 paddw xmm5, xmm0 pxor xmm0, xmm1 paddw xmm5, xmm3 pxor xmm3, xmm4 psubw xmm0, xmm1 psubw xmm3, xmm4 movdqa [edi + ecx*8], xmm0 movdqa [edi + ecx*8 + 16], xmm3 add ecx, 4 cmp ecx, 16 jnz .qes2_q1loop jmp .qes2_done ;=========================================================================== ; ; uint32_t dequant_h263_intra_mmx(int16_t *data, ; const int16_t const *coeff, ; const uint32_t quant, ; const uint32_t dcscalar); ; ;=========================================================================== ; note: we only saturate to +2047 *before* restoring the sign. ; Hence, final clamp really is [-2048,2047] align ALIGN cglobal dequant_h263_intra_mmx dequant_h263_intra_mmx: mov edx, [esp+ 4] ; data mov ecx, [esp+ 8] ; coeff mov eax, [esp+12] ; quant movq mm6, [mmx_add + eax*8 - 8] ; quant or quant-1 movq mm7, [mmx_mul + eax*8 - 8] ; 2*quant mov eax, -16 align ALIGN .loop movq mm0, [ecx+8*eax+8*16] ; c = coeff[i] movq mm3, [ecx+8*eax+8*16 + 8] ; c' = coeff[i+1] pxor mm1, mm1 pxor mm4, mm4 pcmpgtw mm1, mm0 ; sign(c) pcmpgtw mm4, mm3 ; sign(c') pxor mm2, mm2 pxor mm5, mm5 pcmpeqw mm2, mm0 ; c is zero pcmpeqw mm5, mm3 ; c' is zero pandn mm2, mm6 ; offset = isZero ? 0 : quant_add pandn mm5, mm6 pxor mm0, mm1 ; negate if negative pxor mm3, mm4 ; negate if negative psubw mm0, mm1 psubw mm3, mm4 pmullw mm0, mm7 ; *= 2Q pmullw mm3, mm7 ; *= 2Q paddw mm0, mm2 ; + offset paddw mm3, mm5 ; + offset paddw mm0, mm1 ; negate back paddw mm3, mm4 ; negate back ; saturates to +2047 movq mm2, [mmx_32767_minus_2047] add eax, 2 paddsw mm0, mm2 paddsw mm3, mm2 psubsw mm0, mm2 psubsw mm3, mm2 pxor mm0, mm1 pxor mm3, mm4 movq [edx + 8*eax + 8*16 - 2*8], mm0 movq [edx + 8*eax + 8*16+8 - 2*8], mm3 jnz near .loop ; deal with DC movd mm0, [ecx] pmullw mm0, [esp+16] ; dcscalar movq mm2, [mmx_32767_minus_2047] paddsw mm0, mm2 psubsw mm0, mm2 movq mm3, [mmx_32768_minus_2048] psubsw mm0, mm3 paddsw mm0, mm3 movd eax, mm0 mov [edx], ax xor eax, eax ; return(0); ret ;=========================================================================== ; ; uint32_t dequant_h263_intra_xmm(int16_t *data, ; const int16_t const *coeff, ; const uint32_t quant, ; const uint32_t dcscalar); ; ;=========================================================================== ; this is the same as dequant_inter_mmx, except that we're ; saturating using 'pminsw' (saves 2 cycles/loop => ~5% faster) align ALIGN cglobal dequant_h263_intra_xmm dequant_h263_intra_xmm: mov edx, [esp+ 4] ; data mov ecx, [esp+ 8] ; coeff mov eax, [esp+12] ; quant movq mm6, [mmx_add + eax*8 - 8] ; quant or quant-1 movq mm7, [mmx_mul + eax*8 - 8] ; 2*quant mov eax, -16 align ALIGN .loop movq mm0, [ecx+8*eax+8*16] ; c = coeff[i] movq mm3, [ecx+8*eax+8*16 + 8] ; c' = coeff[i+1] pxor mm1, mm1 pxor mm4, mm4 pcmpgtw mm1, mm0 ; sign(c) pcmpgtw mm4, mm3 ; sign(c') pxor mm2, mm2 pxor mm5, mm5 pcmpeqw mm2, mm0 ; c is zero pcmpeqw mm5, mm3 ; c' is zero pandn mm2, mm6 ; offset = isZero ? 0 : quant_add pandn mm5, mm6 pxor mm0, mm1 ; negate if negative pxor mm3, mm4 ; negate if negative psubw mm0, mm1 psubw mm3, mm4 pmullw mm0, mm7 ; *= 2Q pmullw mm3, mm7 ; *= 2Q paddw mm0, mm2 ; + offset paddw mm3, mm5 ; + offset paddw mm0, mm1 ; negate back paddw mm3, mm4 ; negate back ; saturates to +2047 movq mm2, [mmx_2047] pminsw mm0, mm2 add eax, 2 pminsw mm3, mm2 pxor mm0, mm1 pxor mm3, mm4 movq [edx + 8*eax + 8*16 - 2*8], mm0 movq [edx + 8*eax + 8*16+8 - 2*8], mm3 jnz near .loop ; deal with DC movd mm0, [ecx] pmullw mm0, [esp+16] ; dcscalar movq mm2, [mmx_32767_minus_2047] paddsw mm0, mm2 psubsw mm0, mm2 movq mm2, [mmx_32768_minus_2048] psubsw mm0, mm2 paddsw mm0, mm2 movd eax, mm0 mov [edx], ax xor eax, eax ret ;=========================================================================== ; ; uint32_t dequant_h263_intra_sse2(int16_t *data, ; const int16_t const *coeff, ; const uint32_t quant, ; const uint32_t dcscalar); ; ;=========================================================================== align ALIGN cglobal dequant_h263_intra_sse2 dequant_h263_intra_sse2: mov edx, [esp+ 4] ; data mov ecx, [esp+ 8] ; coeff mov eax, [esp+12] ; quant movq mm6, [mmx_add + eax * 8 - 8] movq mm7, [mmx_mul + eax * 8 - 8] movq2dq xmm6, mm6 movq2dq xmm7, mm7 movlhps xmm6, xmm6 movlhps xmm7, xmm7 mov eax, -16 align ALIGN .loop movdqa xmm0, [ecx + 8*16 + 8*eax] ; c = coeff[i] movdqa xmm3, [ecx + 8*16 + 8*eax+ 16] pxor xmm1, xmm1 pxor xmm4, xmm4 pcmpgtw xmm1, xmm0 ; sign(c) pcmpgtw xmm4, xmm3 pxor xmm2, xmm2 pxor xmm5, xmm5 pcmpeqw xmm2, xmm0 ; c is zero pcmpeqw xmm5, xmm3 pandn xmm2, xmm6 ; offset = isZero ? 0 : quant_add pandn xmm5, xmm6 pxor xmm0, xmm1 ; negate if negative pxor xmm3, xmm4 psubw xmm0, xmm1 psubw xmm3, xmm4 pmullw xmm0, xmm7 ; *= 2Q pmullw xmm3, xmm7 paddw xmm0, xmm2 ; + offset paddw xmm3, xmm5 paddw xmm0, xmm1 ; negate back paddw xmm3, xmm4 ; saturates to +2047 movdqa xmm2, [sse2_2047] pminsw xmm0, xmm2 add eax, 4 pminsw xmm3, xmm2 pxor xmm0, xmm1 pxor xmm3, xmm4 movdqa [edx + 8*16 - 8*4 + 8*eax], xmm0 movdqa [edx + 8*16 - 8*4 + 8*eax + 16], xmm3 jnz near .loop ; deal with DC movd mm0, [ecx] pmullw mm0, [esp+16] ; dcscalar movq mm2, [mmx_32767_minus_2047] paddsw mm0, mm2 psubsw mm0, mm2 movq mm2, [mmx_32768_minus_2048] psubsw mm0, mm2 paddsw mm0, mm2 movd eax, mm0 mov [edx], ax xor eax, eax ret ;=========================================================================== ; ; uint32t dequant_h263_inter_mmx(int16_t * data, ; const int16_t * const coeff, ; const uint32_t quant); ; ;=========================================================================== align ALIGN cglobal dequant_h263_inter_mmx dequant_h263_inter_mmx: mov edx, [esp+ 4] ; data mov ecx, [esp+ 8] ; coeff mov eax, [esp+12] ; quant movq mm6, [mmx_add + eax*8 - 8] ; quant or quant-1 movq mm7, [mmx_mul + eax*8 - 8] ; 2*quant mov eax, -16 align ALIGN .loop movq mm0, [ecx+8*eax+8*16] ; c = coeff[i] movq mm3, [ecx+8*eax+8*16 + 8] ; c' = coeff[i+1] pxor mm1, mm1 pxor mm4, mm4 pcmpgtw mm1, mm0 ; sign(c) pcmpgtw mm4, mm3 ; sign(c') pxor mm2, mm2 pxor mm5, mm5 pcmpeqw mm2, mm0 ; c is zero pcmpeqw mm5, mm3 ; c' is zero pandn mm2, mm6 ; offset = isZero ? 0 : quant_add pandn mm5, mm6 pxor mm0, mm1 ; negate if negative pxor mm3, mm4 ; negate if negative psubw mm0, mm1 psubw mm3, mm4 pmullw mm0, mm7 ; *= 2Q pmullw mm3, mm7 ; *= 2Q paddw mm0, mm2 ; + offset paddw mm3, mm5 ; + offset paddw mm0, mm1 ; negate back paddw mm3, mm4 ; negate back ; saturates to +2047 movq mm2, [mmx_32767_minus_2047] add eax, 2 paddsw mm0, mm2 paddsw mm3, mm2 psubsw mm0, mm2 psubsw mm3, mm2 pxor mm0, mm1 pxor mm3, mm4 movq [edx + 8*eax + 8*16 - 2*8], mm0 movq [edx + 8*eax + 8*16+8 - 2*8], mm3 jnz near .loop xor eax, eax ret ;=========================================================================== ; ; uint32_t dequant_h263_inter_xmm(int16_t * data, ; const int16_t * const coeff, ; const uint32_t quant); ; ;=========================================================================== ; this is the same as dequant_inter_mmx, ; except that we're saturating using 'pminsw' (saves 2 cycles/loop) align ALIGN cglobal dequant_h263_inter_xmm dequant_h263_inter_xmm: mov edx, [esp+ 4] ; data mov ecx, [esp+ 8] ; coeff mov eax, [esp+12] ; quant movq mm6, [mmx_add + eax*8 - 8] ; quant or quant-1 movq mm7, [mmx_mul + eax*8 - 8] ; 2*quant mov eax, -16 align ALIGN .loop movq mm0, [ecx+8*eax+8*16] ; c = coeff[i] movq mm3, [ecx+8*eax+8*16 + 8] ; c' = coeff[i+1] pxor mm1, mm1 pxor mm4, mm4 pcmpgtw mm1, mm0 ; sign(c) pcmpgtw mm4, mm3 ; sign(c') pxor mm2, mm2 pxor mm5, mm5 pcmpeqw mm2, mm0 ; c is zero pcmpeqw mm5, mm3 ; c' is zero pandn mm2, mm6 ; offset = isZero ? 0 : quant_add pandn mm5, mm6 pxor mm0, mm1 ; negate if negative pxor mm3, mm4 ; negate if negative psubw mm0, mm1 psubw mm3, mm4 pmullw mm0, mm7 ; *= 2Q pmullw mm3, mm7 ; *= 2Q paddw mm0, mm2 ; + offset paddw mm3, mm5 ; + offset paddw mm0, mm1 ; start restoring sign paddw mm3, mm4 ; start restoring sign ; saturates to +2047 movq mm2, [mmx_2047] pminsw mm0, mm2 add eax, 2 pminsw mm3, mm2 pxor mm0, mm1 ; finish restoring sign pxor mm3, mm4 ; finish restoring sign movq [edx + 8*eax + 8*16 - 2*8], mm0 movq [edx + 8*eax + 8*16+8 - 2*8], mm3 jnz near .loop xor eax, eax ret ;=========================================================================== ; ; uint32_t dequant_h263_inter_sse2(int16_t * data, ; const int16_t * const coeff, ; const uint32_t quant); ; ;=========================================================================== align ALIGN cglobal dequant_h263_inter_sse2 dequant_h263_inter_sse2: mov edx, [esp + 4] ; data mov ecx, [esp + 8] ; coeff mov eax, [esp + 12] ; quant movq mm6, [mmx_add + eax * 8 - 8] movq mm7, [mmx_mul + eax * 8 - 8] movq2dq xmm6, mm6 movq2dq xmm7, mm7 movlhps xmm6, xmm6 movlhps xmm7, xmm7 mov eax, -16 align ALIGN .loop movdqa xmm0, [ecx + 8*16 + 8*eax] ; c = coeff[i] movdqa xmm3, [ecx + 8*16 + 8*eax + 16] pxor xmm1, xmm1 pxor xmm4, xmm4 pcmpgtw xmm1, xmm0 ; sign(c) pcmpgtw xmm4, xmm3 pxor xmm2, xmm2 pxor xmm5, xmm5 pcmpeqw xmm2, xmm0 ; c is zero pcmpeqw xmm5, xmm3 pandn xmm2, xmm6 pandn xmm5, xmm6 pxor xmm0, xmm1 ; negate if negative pxor xmm3, xmm4 psubw xmm0, xmm1 psubw xmm3, xmm4 pmullw xmm0, xmm7 ; *= 2Q pmullw xmm3, xmm7 paddw xmm0, xmm2 ; + offset paddw xmm3, xmm5 paddw xmm0, xmm1 ; start restoring sign paddw xmm3, xmm4 ; saturates to +2047 movdqa xmm2, [sse2_2047] pminsw xmm0, xmm2 add eax, 4 pminsw xmm3, xmm2 pxor xmm0, xmm1 ; finish restoring sign pxor xmm3, xmm4 movdqa [edx + 8*16 - 8*4 + 8*eax], xmm0 movdqa [edx + 8*16 - 8*4 + 8*eax + 16], xmm3 jnz near .loop xor eax, eax ret
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