| ; |
| ; jidctred.asm - reduced-size IDCT (MMX) |
| ; |
| ; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB |
| ; |
| ; Based on |
| ; x86 SIMD extension for IJG JPEG library |
| ; Copyright (C) 1999-2006, MIYASAKA Masaru. |
| ; For conditions of distribution and use, see copyright notice in jsimdext.inc |
| ; |
| ; This file should be assembled with NASM (Netwide Assembler), |
| ; can *not* be assembled with Microsoft's MASM or any compatible |
| ; assembler (including Borland's Turbo Assembler). |
| ; NASM is available from http://nasm.sourceforge.net/ or |
| ; http://sourceforge.net/project/showfiles.php?group_id=6208 |
| ; |
| ; This file contains inverse-DCT routines that produce reduced-size |
| ; output: either 4x4 or 2x2 pixels from an 8x8 DCT block. |
| ; The following code is based directly on the IJG's original jidctred.c; |
| ; see the jidctred.c for more details. |
| ; |
| ; [TAB8] |
| |
| %include "jsimdext.inc" |
| %include "jdct.inc" |
| |
| ; -------------------------------------------------------------------------- |
| |
| %define CONST_BITS 13 |
| %define PASS1_BITS 2 |
| |
| %define DESCALE_P1_4 (CONST_BITS-PASS1_BITS+1) |
| %define DESCALE_P2_4 (CONST_BITS+PASS1_BITS+3+1) |
| %define DESCALE_P1_2 (CONST_BITS-PASS1_BITS+2) |
| %define DESCALE_P2_2 (CONST_BITS+PASS1_BITS+3+2) |
| |
| %if CONST_BITS == 13 |
| F_0_211 equ 1730 ; FIX(0.211164243) |
| F_0_509 equ 4176 ; FIX(0.509795579) |
| F_0_601 equ 4926 ; FIX(0.601344887) |
| F_0_720 equ 5906 ; FIX(0.720959822) |
| F_0_765 equ 6270 ; FIX(0.765366865) |
| F_0_850 equ 6967 ; FIX(0.850430095) |
| F_0_899 equ 7373 ; FIX(0.899976223) |
| F_1_061 equ 8697 ; FIX(1.061594337) |
| F_1_272 equ 10426 ; FIX(1.272758580) |
| F_1_451 equ 11893 ; FIX(1.451774981) |
| F_1_847 equ 15137 ; FIX(1.847759065) |
| F_2_172 equ 17799 ; FIX(2.172734803) |
| F_2_562 equ 20995 ; FIX(2.562915447) |
| F_3_624 equ 29692 ; FIX(3.624509785) |
| %else |
| ; NASM cannot do compile-time arithmetic on floating-point constants. |
| %define DESCALE(x,n) (((x)+(1<<((n)-1)))>>(n)) |
| F_0_211 equ DESCALE( 226735879,30-CONST_BITS) ; FIX(0.211164243) |
| F_0_509 equ DESCALE( 547388834,30-CONST_BITS) ; FIX(0.509795579) |
| F_0_601 equ DESCALE( 645689155,30-CONST_BITS) ; FIX(0.601344887) |
| F_0_720 equ DESCALE( 774124714,30-CONST_BITS) ; FIX(0.720959822) |
| F_0_765 equ DESCALE( 821806413,30-CONST_BITS) ; FIX(0.765366865) |
| F_0_850 equ DESCALE( 913142361,30-CONST_BITS) ; FIX(0.850430095) |
| F_0_899 equ DESCALE( 966342111,30-CONST_BITS) ; FIX(0.899976223) |
| F_1_061 equ DESCALE(1139878239,30-CONST_BITS) ; FIX(1.061594337) |
| F_1_272 equ DESCALE(1366614119,30-CONST_BITS) ; FIX(1.272758580) |
| F_1_451 equ DESCALE(1558831516,30-CONST_BITS) ; FIX(1.451774981) |
| F_1_847 equ DESCALE(1984016188,30-CONST_BITS) ; FIX(1.847759065) |
| F_2_172 equ DESCALE(2332956230,30-CONST_BITS) ; FIX(2.172734803) |
| F_2_562 equ DESCALE(2751909506,30-CONST_BITS) ; FIX(2.562915447) |
| F_3_624 equ DESCALE(3891787747,30-CONST_BITS) ; FIX(3.624509785) |
| %endif |
| |
| ; -------------------------------------------------------------------------- |
| SECTION SEG_CONST |
| |
| alignz 16 |
| global EXTN(jconst_idct_red_mmx) |
| |
| EXTN(jconst_idct_red_mmx): |
| |
| PW_F184_MF076 times 2 dw F_1_847,-F_0_765 |
| PW_F256_F089 times 2 dw F_2_562, F_0_899 |
| PW_F106_MF217 times 2 dw F_1_061,-F_2_172 |
| PW_MF060_MF050 times 2 dw -F_0_601,-F_0_509 |
| PW_F145_MF021 times 2 dw F_1_451,-F_0_211 |
| PW_F362_MF127 times 2 dw F_3_624,-F_1_272 |
| PW_F085_MF072 times 2 dw F_0_850,-F_0_720 |
| PD_DESCALE_P1_4 times 2 dd 1 << (DESCALE_P1_4-1) |
| PD_DESCALE_P2_4 times 2 dd 1 << (DESCALE_P2_4-1) |
| PD_DESCALE_P1_2 times 2 dd 1 << (DESCALE_P1_2-1) |
| PD_DESCALE_P2_2 times 2 dd 1 << (DESCALE_P2_2-1) |
| PB_CENTERJSAMP times 8 db CENTERJSAMPLE |
| |
| alignz 16 |
| |
| ; -------------------------------------------------------------------------- |
| SECTION SEG_TEXT |
| BITS 32 |
| ; |
| ; Perform dequantization and inverse DCT on one block of coefficients, |
| ; producing a reduced-size 4x4 output block. |
| ; |
| ; GLOBAL(void) |
| ; jsimd_idct_4x4_mmx (void *dct_table, JCOEFPTR coef_block, |
| ; JSAMPARRAY output_buf, JDIMENSION output_col) |
| ; |
| |
| %define dct_table(b) (b)+8 ; void *dct_table |
| %define coef_block(b) (b)+12 ; JCOEFPTR coef_block |
| %define output_buf(b) (b)+16 ; JSAMPARRAY output_buf |
| %define output_col(b) (b)+20 ; JDIMENSION output_col |
| |
| %define original_ebp ebp+0 |
| %define wk(i) ebp-(WK_NUM-(i))*SIZEOF_MMWORD ; mmword wk[WK_NUM] |
| %define WK_NUM 2 |
| %define workspace wk(0)-DCTSIZE2*SIZEOF_JCOEF |
| ; JCOEF workspace[DCTSIZE2] |
| |
| align 16 |
| global EXTN(jsimd_idct_4x4_mmx) |
| |
| EXTN(jsimd_idct_4x4_mmx): |
| push ebp |
| mov eax,esp ; eax = original ebp |
| sub esp, byte 4 |
| and esp, byte (-SIZEOF_MMWORD) ; align to 64 bits |
| mov [esp],eax |
| mov ebp,esp ; ebp = aligned ebp |
| lea esp, [workspace] |
| pushpic ebx |
| ; push ecx ; need not be preserved |
| ; push edx ; need not be preserved |
| push esi |
| push edi |
| |
| get_GOT ebx ; get GOT address |
| |
| ; ---- Pass 1: process columns from input, store into work array. |
| |
| ; mov eax, [original_ebp] |
| mov edx, POINTER [dct_table(eax)] ; quantptr |
| mov esi, JCOEFPTR [coef_block(eax)] ; inptr |
| lea edi, [workspace] ; JCOEF *wsptr |
| mov ecx, DCTSIZE/4 ; ctr |
| alignx 16,7 |
| .columnloop: |
| %ifndef NO_ZERO_COLUMN_TEST_4X4_MMX |
| mov eax, DWORD [DWBLOCK(1,0,esi,SIZEOF_JCOEF)] |
| or eax, DWORD [DWBLOCK(2,0,esi,SIZEOF_JCOEF)] |
| jnz short .columnDCT |
| |
| movq mm0, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)] |
| movq mm1, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)] |
| por mm0, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)] |
| por mm1, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)] |
| por mm0, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)] |
| por mm1, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)] |
| por mm0,mm1 |
| packsswb mm0,mm0 |
| movd eax,mm0 |
| test eax,eax |
| jnz short .columnDCT |
| |
| ; -- AC terms all zero |
| |
| movq mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)] |
| pmullw mm0, MMWORD [MMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)] |
| |
| psllw mm0,PASS1_BITS |
| |
| movq mm2,mm0 ; mm0=in0=(00 01 02 03) |
| punpcklwd mm0,mm0 ; mm0=(00 00 01 01) |
| punpckhwd mm2,mm2 ; mm2=(02 02 03 03) |
| |
| movq mm1,mm0 |
| punpckldq mm0,mm0 ; mm0=(00 00 00 00) |
| punpckhdq mm1,mm1 ; mm1=(01 01 01 01) |
| movq mm3,mm2 |
| punpckldq mm2,mm2 ; mm2=(02 02 02 02) |
| punpckhdq mm3,mm3 ; mm3=(03 03 03 03) |
| |
| movq MMWORD [MMBLOCK(0,0,edi,SIZEOF_JCOEF)], mm0 |
| movq MMWORD [MMBLOCK(1,0,edi,SIZEOF_JCOEF)], mm1 |
| movq MMWORD [MMBLOCK(2,0,edi,SIZEOF_JCOEF)], mm2 |
| movq MMWORD [MMBLOCK(3,0,edi,SIZEOF_JCOEF)], mm3 |
| jmp near .nextcolumn |
| alignx 16,7 |
| %endif |
| .columnDCT: |
| |
| ; -- Odd part |
| |
| movq mm0, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)] |
| movq mm1, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)] |
| pmullw mm0, MMWORD [MMBLOCK(1,0,edx,SIZEOF_ISLOW_MULT_TYPE)] |
| pmullw mm1, MMWORD [MMBLOCK(3,0,edx,SIZEOF_ISLOW_MULT_TYPE)] |
| movq mm2, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)] |
| movq mm3, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)] |
| pmullw mm2, MMWORD [MMBLOCK(5,0,edx,SIZEOF_ISLOW_MULT_TYPE)] |
| pmullw mm3, MMWORD [MMBLOCK(7,0,edx,SIZEOF_ISLOW_MULT_TYPE)] |
| |
| movq mm4,mm0 |
| movq mm5,mm0 |
| punpcklwd mm4,mm1 |
| punpckhwd mm5,mm1 |
| movq mm0,mm4 |
| movq mm1,mm5 |
| pmaddwd mm4,[GOTOFF(ebx,PW_F256_F089)] ; mm4=(tmp2L) |
| pmaddwd mm5,[GOTOFF(ebx,PW_F256_F089)] ; mm5=(tmp2H) |
| pmaddwd mm0,[GOTOFF(ebx,PW_F106_MF217)] ; mm0=(tmp0L) |
| pmaddwd mm1,[GOTOFF(ebx,PW_F106_MF217)] ; mm1=(tmp0H) |
| |
| movq mm6,mm2 |
| movq mm7,mm2 |
| punpcklwd mm6,mm3 |
| punpckhwd mm7,mm3 |
| movq mm2,mm6 |
| movq mm3,mm7 |
| pmaddwd mm6,[GOTOFF(ebx,PW_MF060_MF050)] ; mm6=(tmp2L) |
| pmaddwd mm7,[GOTOFF(ebx,PW_MF060_MF050)] ; mm7=(tmp2H) |
| pmaddwd mm2,[GOTOFF(ebx,PW_F145_MF021)] ; mm2=(tmp0L) |
| pmaddwd mm3,[GOTOFF(ebx,PW_F145_MF021)] ; mm3=(tmp0H) |
| |
| paddd mm6,mm4 ; mm6=tmp2L |
| paddd mm7,mm5 ; mm7=tmp2H |
| paddd mm2,mm0 ; mm2=tmp0L |
| paddd mm3,mm1 ; mm3=tmp0H |
| |
| movq MMWORD [wk(0)], mm2 ; wk(0)=tmp0L |
| movq MMWORD [wk(1)], mm3 ; wk(1)=tmp0H |
| |
| ; -- Even part |
| |
| movq mm4, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)] |
| movq mm5, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)] |
| movq mm0, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)] |
| pmullw mm4, MMWORD [MMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)] |
| pmullw mm5, MMWORD [MMBLOCK(2,0,edx,SIZEOF_ISLOW_MULT_TYPE)] |
| pmullw mm0, MMWORD [MMBLOCK(6,0,edx,SIZEOF_ISLOW_MULT_TYPE)] |
| |
| pxor mm1,mm1 |
| pxor mm2,mm2 |
| punpcklwd mm1,mm4 ; mm1=tmp0L |
| punpckhwd mm2,mm4 ; mm2=tmp0H |
| psrad mm1,(16-CONST_BITS-1) ; psrad mm1,16 & pslld mm1,CONST_BITS+1 |
| psrad mm2,(16-CONST_BITS-1) ; psrad mm2,16 & pslld mm2,CONST_BITS+1 |
| |
| movq mm3,mm5 ; mm5=in2=z2 |
| punpcklwd mm5,mm0 ; mm0=in6=z3 |
| punpckhwd mm3,mm0 |
| pmaddwd mm5,[GOTOFF(ebx,PW_F184_MF076)] ; mm5=tmp2L |
| pmaddwd mm3,[GOTOFF(ebx,PW_F184_MF076)] ; mm3=tmp2H |
| |
| movq mm4,mm1 |
| movq mm0,mm2 |
| paddd mm1,mm5 ; mm1=tmp10L |
| paddd mm2,mm3 ; mm2=tmp10H |
| psubd mm4,mm5 ; mm4=tmp12L |
| psubd mm0,mm3 ; mm0=tmp12H |
| |
| ; -- Final output stage |
| |
| movq mm5,mm1 |
| movq mm3,mm2 |
| paddd mm1,mm6 ; mm1=data0L |
| paddd mm2,mm7 ; mm2=data0H |
| psubd mm5,mm6 ; mm5=data3L |
| psubd mm3,mm7 ; mm3=data3H |
| |
| movq mm6,[GOTOFF(ebx,PD_DESCALE_P1_4)] ; mm6=[PD_DESCALE_P1_4] |
| |
| paddd mm1,mm6 |
| paddd mm2,mm6 |
| psrad mm1,DESCALE_P1_4 |
| psrad mm2,DESCALE_P1_4 |
| paddd mm5,mm6 |
| paddd mm3,mm6 |
| psrad mm5,DESCALE_P1_4 |
| psrad mm3,DESCALE_P1_4 |
| |
| packssdw mm1,mm2 ; mm1=data0=(00 01 02 03) |
| packssdw mm5,mm3 ; mm5=data3=(30 31 32 33) |
| |
| movq mm7, MMWORD [wk(0)] ; mm7=tmp0L |
| movq mm6, MMWORD [wk(1)] ; mm6=tmp0H |
| |
| movq mm2,mm4 |
| movq mm3,mm0 |
| paddd mm4,mm7 ; mm4=data1L |
| paddd mm0,mm6 ; mm0=data1H |
| psubd mm2,mm7 ; mm2=data2L |
| psubd mm3,mm6 ; mm3=data2H |
| |
| movq mm7,[GOTOFF(ebx,PD_DESCALE_P1_4)] ; mm7=[PD_DESCALE_P1_4] |
| |
| paddd mm4,mm7 |
| paddd mm0,mm7 |
| psrad mm4,DESCALE_P1_4 |
| psrad mm0,DESCALE_P1_4 |
| paddd mm2,mm7 |
| paddd mm3,mm7 |
| psrad mm2,DESCALE_P1_4 |
| psrad mm3,DESCALE_P1_4 |
| |
| packssdw mm4,mm0 ; mm4=data1=(10 11 12 13) |
| packssdw mm2,mm3 ; mm2=data2=(20 21 22 23) |
| |
| movq mm6,mm1 ; transpose coefficients(phase 1) |
| punpcklwd mm1,mm4 ; mm1=(00 10 01 11) |
| punpckhwd mm6,mm4 ; mm6=(02 12 03 13) |
| movq mm7,mm2 ; transpose coefficients(phase 1) |
| punpcklwd mm2,mm5 ; mm2=(20 30 21 31) |
| punpckhwd mm7,mm5 ; mm7=(22 32 23 33) |
| |
| movq mm0,mm1 ; transpose coefficients(phase 2) |
| punpckldq mm1,mm2 ; mm1=(00 10 20 30) |
| punpckhdq mm0,mm2 ; mm0=(01 11 21 31) |
| movq mm3,mm6 ; transpose coefficients(phase 2) |
| punpckldq mm6,mm7 ; mm6=(02 12 22 32) |
| punpckhdq mm3,mm7 ; mm3=(03 13 23 33) |
| |
| movq MMWORD [MMBLOCK(0,0,edi,SIZEOF_JCOEF)], mm1 |
| movq MMWORD [MMBLOCK(1,0,edi,SIZEOF_JCOEF)], mm0 |
| movq MMWORD [MMBLOCK(2,0,edi,SIZEOF_JCOEF)], mm6 |
| movq MMWORD [MMBLOCK(3,0,edi,SIZEOF_JCOEF)], mm3 |
| |
| .nextcolumn: |
| add esi, byte 4*SIZEOF_JCOEF ; coef_block |
| add edx, byte 4*SIZEOF_ISLOW_MULT_TYPE ; quantptr |
| add edi, byte 4*DCTSIZE*SIZEOF_JCOEF ; wsptr |
| dec ecx ; ctr |
| jnz near .columnloop |
| |
| ; ---- Pass 2: process rows from work array, store into output array. |
| |
| mov eax, [original_ebp] |
| lea esi, [workspace] ; JCOEF *wsptr |
| mov edi, JSAMPARRAY [output_buf(eax)] ; (JSAMPROW *) |
| mov eax, JDIMENSION [output_col(eax)] |
| |
| ; -- Odd part |
| |
| movq mm0, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)] |
| movq mm1, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)] |
| movq mm2, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)] |
| movq mm3, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)] |
| |
| movq mm4,mm0 |
| movq mm5,mm0 |
| punpcklwd mm4,mm1 |
| punpckhwd mm5,mm1 |
| movq mm0,mm4 |
| movq mm1,mm5 |
| pmaddwd mm4,[GOTOFF(ebx,PW_F256_F089)] ; mm4=(tmp2L) |
| pmaddwd mm5,[GOTOFF(ebx,PW_F256_F089)] ; mm5=(tmp2H) |
| pmaddwd mm0,[GOTOFF(ebx,PW_F106_MF217)] ; mm0=(tmp0L) |
| pmaddwd mm1,[GOTOFF(ebx,PW_F106_MF217)] ; mm1=(tmp0H) |
| |
| movq mm6,mm2 |
| movq mm7,mm2 |
| punpcklwd mm6,mm3 |
| punpckhwd mm7,mm3 |
| movq mm2,mm6 |
| movq mm3,mm7 |
| pmaddwd mm6,[GOTOFF(ebx,PW_MF060_MF050)] ; mm6=(tmp2L) |
| pmaddwd mm7,[GOTOFF(ebx,PW_MF060_MF050)] ; mm7=(tmp2H) |
| pmaddwd mm2,[GOTOFF(ebx,PW_F145_MF021)] ; mm2=(tmp0L) |
| pmaddwd mm3,[GOTOFF(ebx,PW_F145_MF021)] ; mm3=(tmp0H) |
| |
| paddd mm6,mm4 ; mm6=tmp2L |
| paddd mm7,mm5 ; mm7=tmp2H |
| paddd mm2,mm0 ; mm2=tmp0L |
| paddd mm3,mm1 ; mm3=tmp0H |
| |
| movq MMWORD [wk(0)], mm2 ; wk(0)=tmp0L |
| movq MMWORD [wk(1)], mm3 ; wk(1)=tmp0H |
| |
| ; -- Even part |
| |
| movq mm4, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)] |
| movq mm5, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)] |
| movq mm0, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)] |
| |
| pxor mm1,mm1 |
| pxor mm2,mm2 |
| punpcklwd mm1,mm4 ; mm1=tmp0L |
| punpckhwd mm2,mm4 ; mm2=tmp0H |
| psrad mm1,(16-CONST_BITS-1) ; psrad mm1,16 & pslld mm1,CONST_BITS+1 |
| psrad mm2,(16-CONST_BITS-1) ; psrad mm2,16 & pslld mm2,CONST_BITS+1 |
| |
| movq mm3,mm5 ; mm5=in2=z2 |
| punpcklwd mm5,mm0 ; mm0=in6=z3 |
| punpckhwd mm3,mm0 |
| pmaddwd mm5,[GOTOFF(ebx,PW_F184_MF076)] ; mm5=tmp2L |
| pmaddwd mm3,[GOTOFF(ebx,PW_F184_MF076)] ; mm3=tmp2H |
| |
| movq mm4,mm1 |
| movq mm0,mm2 |
| paddd mm1,mm5 ; mm1=tmp10L |
| paddd mm2,mm3 ; mm2=tmp10H |
| psubd mm4,mm5 ; mm4=tmp12L |
| psubd mm0,mm3 ; mm0=tmp12H |
| |
| ; -- Final output stage |
| |
| movq mm5,mm1 |
| movq mm3,mm2 |
| paddd mm1,mm6 ; mm1=data0L |
| paddd mm2,mm7 ; mm2=data0H |
| psubd mm5,mm6 ; mm5=data3L |
| psubd mm3,mm7 ; mm3=data3H |
| |
| movq mm6,[GOTOFF(ebx,PD_DESCALE_P2_4)] ; mm6=[PD_DESCALE_P2_4] |
| |
| paddd mm1,mm6 |
| paddd mm2,mm6 |
| psrad mm1,DESCALE_P2_4 |
| psrad mm2,DESCALE_P2_4 |
| paddd mm5,mm6 |
| paddd mm3,mm6 |
| psrad mm5,DESCALE_P2_4 |
| psrad mm3,DESCALE_P2_4 |
| |
| packssdw mm1,mm2 ; mm1=data0=(00 10 20 30) |
| packssdw mm5,mm3 ; mm5=data3=(03 13 23 33) |
| |
| movq mm7, MMWORD [wk(0)] ; mm7=tmp0L |
| movq mm6, MMWORD [wk(1)] ; mm6=tmp0H |
| |
| movq mm2,mm4 |
| movq mm3,mm0 |
| paddd mm4,mm7 ; mm4=data1L |
| paddd mm0,mm6 ; mm0=data1H |
| psubd mm2,mm7 ; mm2=data2L |
| psubd mm3,mm6 ; mm3=data2H |
| |
| movq mm7,[GOTOFF(ebx,PD_DESCALE_P2_4)] ; mm7=[PD_DESCALE_P2_4] |
| |
| paddd mm4,mm7 |
| paddd mm0,mm7 |
| psrad mm4,DESCALE_P2_4 |
| psrad mm0,DESCALE_P2_4 |
| paddd mm2,mm7 |
| paddd mm3,mm7 |
| psrad mm2,DESCALE_P2_4 |
| psrad mm3,DESCALE_P2_4 |
| |
| packssdw mm4,mm0 ; mm4=data1=(01 11 21 31) |
| packssdw mm2,mm3 ; mm2=data2=(02 12 22 32) |
| |
| movq mm6,[GOTOFF(ebx,PB_CENTERJSAMP)] ; mm6=[PB_CENTERJSAMP] |
| |
| packsswb mm1,mm2 ; mm1=(00 10 20 30 02 12 22 32) |
| packsswb mm4,mm5 ; mm4=(01 11 21 31 03 13 23 33) |
| paddb mm1,mm6 |
| paddb mm4,mm6 |
| |
| movq mm7,mm1 ; transpose coefficients(phase 1) |
| punpcklbw mm1,mm4 ; mm1=(00 01 10 11 20 21 30 31) |
| punpckhbw mm7,mm4 ; mm7=(02 03 12 13 22 23 32 33) |
| |
| movq mm0,mm1 ; transpose coefficients(phase 2) |
| punpcklwd mm1,mm7 ; mm1=(00 01 02 03 10 11 12 13) |
| punpckhwd mm0,mm7 ; mm0=(20 21 22 23 30 31 32 33) |
| |
| mov edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW] |
| mov esi, JSAMPROW [edi+2*SIZEOF_JSAMPROW] |
| movd DWORD [edx+eax*SIZEOF_JSAMPLE], mm1 |
| movd DWORD [esi+eax*SIZEOF_JSAMPLE], mm0 |
| |
| psrlq mm1,4*BYTE_BIT |
| psrlq mm0,4*BYTE_BIT |
| |
| mov edx, JSAMPROW [edi+1*SIZEOF_JSAMPROW] |
| mov esi, JSAMPROW [edi+3*SIZEOF_JSAMPROW] |
| movd DWORD [edx+eax*SIZEOF_JSAMPLE], mm1 |
| movd DWORD [esi+eax*SIZEOF_JSAMPLE], mm0 |
| |
| emms ; empty MMX state |
| |
| pop edi |
| pop esi |
| ; pop edx ; need not be preserved |
| ; pop ecx ; need not be preserved |
| poppic ebx |
| mov esp,ebp ; esp <- aligned ebp |
| pop esp ; esp <- original ebp |
| pop ebp |
| ret |
| |
| |
| ; -------------------------------------------------------------------------- |
| ; |
| ; Perform dequantization and inverse DCT on one block of coefficients, |
| ; producing a reduced-size 2x2 output block. |
| ; |
| ; GLOBAL(void) |
| ; jsimd_idct_2x2_mmx (void *dct_table, JCOEFPTR coef_block, |
| ; JSAMPARRAY output_buf, JDIMENSION output_col) |
| ; |
| |
| %define dct_table(b) (b)+8 ; void *dct_table |
| %define coef_block(b) (b)+12 ; JCOEFPTR coef_block |
| %define output_buf(b) (b)+16 ; JSAMPARRAY output_buf |
| %define output_col(b) (b)+20 ; JDIMENSION output_col |
| |
| align 16 |
| global EXTN(jsimd_idct_2x2_mmx) |
| |
| EXTN(jsimd_idct_2x2_mmx): |
| push ebp |
| mov ebp,esp |
| push ebx |
| ; push ecx ; need not be preserved |
| ; push edx ; need not be preserved |
| push esi |
| push edi |
| |
| get_GOT ebx ; get GOT address |
| |
| ; ---- Pass 1: process columns from input. |
| |
| mov edx, POINTER [dct_table(ebp)] ; quantptr |
| mov esi, JCOEFPTR [coef_block(ebp)] ; inptr |
| |
| ; | input: | result: | |
| ; | 00 01 ** 03 ** 05 ** 07 | | |
| ; | 10 11 ** 13 ** 15 ** 17 | | |
| ; | ** ** ** ** ** ** ** ** | | |
| ; | 30 31 ** 33 ** 35 ** 37 | A0 A1 A3 A5 A7 | |
| ; | ** ** ** ** ** ** ** ** | B0 B1 B3 B5 B7 | |
| ; | 50 51 ** 53 ** 55 ** 57 | | |
| ; | ** ** ** ** ** ** ** ** | | |
| ; | 70 71 ** 73 ** 75 ** 77 | | |
| |
| ; -- Odd part |
| |
| movq mm0, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)] |
| movq mm1, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)] |
| pmullw mm0, MMWORD [MMBLOCK(1,0,edx,SIZEOF_ISLOW_MULT_TYPE)] |
| pmullw mm1, MMWORD [MMBLOCK(3,0,edx,SIZEOF_ISLOW_MULT_TYPE)] |
| movq mm2, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)] |
| movq mm3, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)] |
| pmullw mm2, MMWORD [MMBLOCK(5,0,edx,SIZEOF_ISLOW_MULT_TYPE)] |
| pmullw mm3, MMWORD [MMBLOCK(7,0,edx,SIZEOF_ISLOW_MULT_TYPE)] |
| |
| ; mm0=(10 11 ** 13), mm1=(30 31 ** 33) |
| ; mm2=(50 51 ** 53), mm3=(70 71 ** 73) |
| |
| pcmpeqd mm7,mm7 |
| pslld mm7,WORD_BIT ; mm7={0x0000 0xFFFF 0x0000 0xFFFF} |
| |
| movq mm4,mm0 ; mm4=(10 11 ** 13) |
| movq mm5,mm2 ; mm5=(50 51 ** 53) |
| punpcklwd mm4,mm1 ; mm4=(10 30 11 31) |
| punpcklwd mm5,mm3 ; mm5=(50 70 51 71) |
| pmaddwd mm4,[GOTOFF(ebx,PW_F362_MF127)] |
| pmaddwd mm5,[GOTOFF(ebx,PW_F085_MF072)] |
| |
| psrld mm0,WORD_BIT ; mm0=(11 -- 13 --) |
| pand mm1,mm7 ; mm1=(-- 31 -- 33) |
| psrld mm2,WORD_BIT ; mm2=(51 -- 53 --) |
| pand mm3,mm7 ; mm3=(-- 71 -- 73) |
| por mm0,mm1 ; mm0=(11 31 13 33) |
| por mm2,mm3 ; mm2=(51 71 53 73) |
| pmaddwd mm0,[GOTOFF(ebx,PW_F362_MF127)] |
| pmaddwd mm2,[GOTOFF(ebx,PW_F085_MF072)] |
| |
| paddd mm4,mm5 ; mm4=tmp0[col0 col1] |
| |
| movq mm6, MMWORD [MMBLOCK(1,1,esi,SIZEOF_JCOEF)] |
| movq mm1, MMWORD [MMBLOCK(3,1,esi,SIZEOF_JCOEF)] |
| pmullw mm6, MMWORD [MMBLOCK(1,1,edx,SIZEOF_ISLOW_MULT_TYPE)] |
| pmullw mm1, MMWORD [MMBLOCK(3,1,edx,SIZEOF_ISLOW_MULT_TYPE)] |
| movq mm3, MMWORD [MMBLOCK(5,1,esi,SIZEOF_JCOEF)] |
| movq mm5, MMWORD [MMBLOCK(7,1,esi,SIZEOF_JCOEF)] |
| pmullw mm3, MMWORD [MMBLOCK(5,1,edx,SIZEOF_ISLOW_MULT_TYPE)] |
| pmullw mm5, MMWORD [MMBLOCK(7,1,edx,SIZEOF_ISLOW_MULT_TYPE)] |
| |
| ; mm6=(** 15 ** 17), mm1=(** 35 ** 37) |
| ; mm3=(** 55 ** 57), mm5=(** 75 ** 77) |
| |
| psrld mm6,WORD_BIT ; mm6=(15 -- 17 --) |
| pand mm1,mm7 ; mm1=(-- 35 -- 37) |
| psrld mm3,WORD_BIT ; mm3=(55 -- 57 --) |
| pand mm5,mm7 ; mm5=(-- 75 -- 77) |
| por mm6,mm1 ; mm6=(15 35 17 37) |
| por mm3,mm5 ; mm3=(55 75 57 77) |
| pmaddwd mm6,[GOTOFF(ebx,PW_F362_MF127)] |
| pmaddwd mm3,[GOTOFF(ebx,PW_F085_MF072)] |
| |
| paddd mm0,mm2 ; mm0=tmp0[col1 col3] |
| paddd mm6,mm3 ; mm6=tmp0[col5 col7] |
| |
| ; -- Even part |
| |
| movq mm1, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)] |
| movq mm5, MMWORD [MMBLOCK(0,1,esi,SIZEOF_JCOEF)] |
| pmullw mm1, MMWORD [MMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)] |
| pmullw mm5, MMWORD [MMBLOCK(0,1,edx,SIZEOF_ISLOW_MULT_TYPE)] |
| |
| ; mm1=(00 01 ** 03), mm5=(** 05 ** 07) |
| |
| movq mm2,mm1 ; mm2=(00 01 ** 03) |
| pslld mm1,WORD_BIT ; mm1=(-- 00 -- **) |
| psrad mm1,(WORD_BIT-CONST_BITS-2) ; mm1=tmp10[col0 ****] |
| |
| pand mm2,mm7 ; mm2=(-- 01 -- 03) |
| pand mm5,mm7 ; mm5=(-- 05 -- 07) |
| psrad mm2,(WORD_BIT-CONST_BITS-2) ; mm2=tmp10[col1 col3] |
| psrad mm5,(WORD_BIT-CONST_BITS-2) ; mm5=tmp10[col5 col7] |
| |
| ; -- Final output stage |
| |
| movq mm3,mm1 |
| paddd mm1,mm4 ; mm1=data0[col0 ****]=(A0 **) |
| psubd mm3,mm4 ; mm3=data1[col0 ****]=(B0 **) |
| punpckldq mm1,mm3 ; mm1=(A0 B0) |
| |
| movq mm7,[GOTOFF(ebx,PD_DESCALE_P1_2)] ; mm7=[PD_DESCALE_P1_2] |
| |
| movq mm4,mm2 |
| movq mm3,mm5 |
| paddd mm2,mm0 ; mm2=data0[col1 col3]=(A1 A3) |
| paddd mm5,mm6 ; mm5=data0[col5 col7]=(A5 A7) |
| psubd mm4,mm0 ; mm4=data1[col1 col3]=(B1 B3) |
| psubd mm3,mm6 ; mm3=data1[col5 col7]=(B5 B7) |
| |
| paddd mm1,mm7 |
| psrad mm1,DESCALE_P1_2 |
| |
| paddd mm2,mm7 |
| paddd mm5,mm7 |
| psrad mm2,DESCALE_P1_2 |
| psrad mm5,DESCALE_P1_2 |
| paddd mm4,mm7 |
| paddd mm3,mm7 |
| psrad mm4,DESCALE_P1_2 |
| psrad mm3,DESCALE_P1_2 |
| |
| ; ---- Pass 2: process rows, store into output array. |
| |
| mov edi, JSAMPARRAY [output_buf(ebp)] ; (JSAMPROW *) |
| mov eax, JDIMENSION [output_col(ebp)] |
| |
| ; | input:| result:| |
| ; | A0 B0 | | |
| ; | A1 B1 | C0 C1 | |
| ; | A3 B3 | D0 D1 | |
| ; | A5 B5 | | |
| ; | A7 B7 | | |
| |
| ; -- Odd part |
| |
| packssdw mm2,mm4 ; mm2=(A1 A3 B1 B3) |
| packssdw mm5,mm3 ; mm5=(A5 A7 B5 B7) |
| pmaddwd mm2,[GOTOFF(ebx,PW_F362_MF127)] |
| pmaddwd mm5,[GOTOFF(ebx,PW_F085_MF072)] |
| |
| paddd mm2,mm5 ; mm2=tmp0[row0 row1] |
| |
| ; -- Even part |
| |
| pslld mm1,(CONST_BITS+2) ; mm1=tmp10[row0 row1] |
| |
| ; -- Final output stage |
| |
| movq mm0,[GOTOFF(ebx,PD_DESCALE_P2_2)] ; mm0=[PD_DESCALE_P2_2] |
| |
| movq mm6,mm1 |
| paddd mm1,mm2 ; mm1=data0[row0 row1]=(C0 C1) |
| psubd mm6,mm2 ; mm6=data1[row0 row1]=(D0 D1) |
| |
| paddd mm1,mm0 |
| paddd mm6,mm0 |
| psrad mm1,DESCALE_P2_2 |
| psrad mm6,DESCALE_P2_2 |
| |
| movq mm7,mm1 ; transpose coefficients |
| punpckldq mm1,mm6 ; mm1=(C0 D0) |
| punpckhdq mm7,mm6 ; mm7=(C1 D1) |
| |
| packssdw mm1,mm7 ; mm1=(C0 D0 C1 D1) |
| packsswb mm1,mm1 ; mm1=(C0 D0 C1 D1 C0 D0 C1 D1) |
| paddb mm1,[GOTOFF(ebx,PB_CENTERJSAMP)] |
| |
| movd ecx,mm1 |
| movd ebx,mm1 ; ebx=(C0 D0 C1 D1) |
| shr ecx,2*BYTE_BIT ; ecx=(C1 D1 -- --) |
| |
| mov edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW] |
| mov esi, JSAMPROW [edi+1*SIZEOF_JSAMPROW] |
| mov WORD [edx+eax*SIZEOF_JSAMPLE], bx |
| mov WORD [esi+eax*SIZEOF_JSAMPLE], cx |
| |
| emms ; empty MMX state |
| |
| pop edi |
| pop esi |
| ; pop edx ; need not be preserved |
| ; pop ecx ; need not be preserved |
| pop ebx |
| pop ebp |
| ret |
| |
| ; For some reason, the OS X linker does not honor the request to align the |
| ; segment unless we do this. |
| align 16 |
