| ; |
| ; jidctred.asm - reduced-size IDCT (SSE2) |
| ; |
| ; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB |
| ; Copyright (C) 2016, D. R. Commander. |
| ; |
| ; Based on the 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 32 |
| GLOBAL_DATA(jconst_idct_red_sse2) |
| |
| EXTN(jconst_idct_red_sse2): |
| |
| PW_F184_MF076 times 4 dw F_1_847, -F_0_765 |
| PW_F256_F089 times 4 dw F_2_562, F_0_899 |
| PW_F106_MF217 times 4 dw F_1_061, -F_2_172 |
| PW_MF060_MF050 times 4 dw -F_0_601, -F_0_509 |
| PW_F145_MF021 times 4 dw F_1_451, -F_0_211 |
| PW_F362_MF127 times 4 dw F_3_624, -F_1_272 |
| PW_F085_MF072 times 4 dw F_0_850, -F_0_720 |
| PD_DESCALE_P1_4 times 4 dd 1 << (DESCALE_P1_4 - 1) |
| PD_DESCALE_P2_4 times 4 dd 1 << (DESCALE_P2_4 - 1) |
| PD_DESCALE_P1_2 times 4 dd 1 << (DESCALE_P1_2 - 1) |
| PD_DESCALE_P2_2 times 4 dd 1 << (DESCALE_P2_2 - 1) |
| PB_CENTERJSAMP times 16 db CENTERJSAMPLE |
| |
| alignz 32 |
| |
| ; -------------------------------------------------------------------------- |
| 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_sse2(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_XMMWORD |
| ; xmmword wk[WK_NUM] |
| %define WK_NUM 2 |
| |
| align 32 |
| GLOBAL_FUNCTION(jsimd_idct_4x4_sse2) |
| |
| EXTN(jsimd_idct_4x4_sse2): |
| push ebp |
| mov eax, esp ; eax = original ebp |
| sub esp, byte 4 |
| and esp, byte (-SIZEOF_XMMWORD) ; align to 128 bits |
| mov [esp], eax |
| mov ebp, esp ; ebp = aligned ebp |
| lea esp, [wk(0)] |
| pushpic ebx |
| ; push ecx ; unused |
| ; push edx ; need not be preserved |
| push esi |
| push edi |
| |
| get_GOT ebx ; get GOT address |
| |
| ; ---- Pass 1: process columns from input. |
| |
| ; mov eax, [original_ebp] |
| mov edx, POINTER [dct_table(eax)] ; quantptr |
| mov esi, JCOEFPTR [coef_block(eax)] ; inptr |
| |
| %ifndef NO_ZERO_COLUMN_TEST_4X4_SSE2 |
| mov eax, DWORD [DWBLOCK(1,0,esi,SIZEOF_JCOEF)] |
| or eax, DWORD [DWBLOCK(2,0,esi,SIZEOF_JCOEF)] |
| jnz short .columnDCT |
| |
| movdqa xmm0, XMMWORD [XMMBLOCK(1,0,esi,SIZEOF_JCOEF)] |
| movdqa xmm1, XMMWORD [XMMBLOCK(2,0,esi,SIZEOF_JCOEF)] |
| por xmm0, XMMWORD [XMMBLOCK(3,0,esi,SIZEOF_JCOEF)] |
| por xmm1, XMMWORD [XMMBLOCK(5,0,esi,SIZEOF_JCOEF)] |
| por xmm0, XMMWORD [XMMBLOCK(6,0,esi,SIZEOF_JCOEF)] |
| por xmm1, XMMWORD [XMMBLOCK(7,0,esi,SIZEOF_JCOEF)] |
| por xmm0, xmm1 |
| packsswb xmm0, xmm0 |
| packsswb xmm0, xmm0 |
| movd eax, xmm0 |
| test eax, eax |
| jnz short .columnDCT |
| |
| ; -- AC terms all zero |
| |
| movdqa xmm0, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_JCOEF)] |
| pmullw xmm0, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)] |
| |
| psllw xmm0, PASS1_BITS |
| |
| movdqa xmm3, xmm0 ; xmm0=in0=(00 01 02 03 04 05 06 07) |
| punpcklwd xmm0, xmm0 ; xmm0=(00 00 01 01 02 02 03 03) |
| punpckhwd xmm3, xmm3 ; xmm3=(04 04 05 05 06 06 07 07) |
| |
| pshufd xmm1, xmm0, 0x50 ; xmm1=[col0 col1]=(00 00 00 00 01 01 01 01) |
| pshufd xmm0, xmm0, 0xFA ; xmm0=[col2 col3]=(02 02 02 02 03 03 03 03) |
| pshufd xmm6, xmm3, 0x50 ; xmm6=[col4 col5]=(04 04 04 04 05 05 05 05) |
| pshufd xmm3, xmm3, 0xFA ; xmm3=[col6 col7]=(06 06 06 06 07 07 07 07) |
| |
| jmp near .column_end |
| alignx 16, 7 |
| %endif |
| .columnDCT: |
| |
| ; -- Odd part |
| |
| movdqa xmm0, XMMWORD [XMMBLOCK(1,0,esi,SIZEOF_JCOEF)] |
| movdqa xmm1, XMMWORD [XMMBLOCK(3,0,esi,SIZEOF_JCOEF)] |
| pmullw xmm0, XMMWORD [XMMBLOCK(1,0,edx,SIZEOF_ISLOW_MULT_TYPE)] |
| pmullw xmm1, XMMWORD [XMMBLOCK(3,0,edx,SIZEOF_ISLOW_MULT_TYPE)] |
| movdqa xmm2, XMMWORD [XMMBLOCK(5,0,esi,SIZEOF_JCOEF)] |
| movdqa xmm3, XMMWORD [XMMBLOCK(7,0,esi,SIZEOF_JCOEF)] |
| pmullw xmm2, XMMWORD [XMMBLOCK(5,0,edx,SIZEOF_ISLOW_MULT_TYPE)] |
| pmullw xmm3, XMMWORD [XMMBLOCK(7,0,edx,SIZEOF_ISLOW_MULT_TYPE)] |
| |
| movdqa xmm4, xmm0 |
| movdqa xmm5, xmm0 |
| punpcklwd xmm4, xmm1 |
| punpckhwd xmm5, xmm1 |
| movdqa xmm0, xmm4 |
| movdqa xmm1, xmm5 |
| pmaddwd xmm4, [GOTOFF(ebx,PW_F256_F089)] ; xmm4=(tmp2L) |
| pmaddwd xmm5, [GOTOFF(ebx,PW_F256_F089)] ; xmm5=(tmp2H) |
| pmaddwd xmm0, [GOTOFF(ebx,PW_F106_MF217)] ; xmm0=(tmp0L) |
| pmaddwd xmm1, [GOTOFF(ebx,PW_F106_MF217)] ; xmm1=(tmp0H) |
| |
| movdqa xmm6, xmm2 |
| movdqa xmm7, xmm2 |
| punpcklwd xmm6, xmm3 |
| punpckhwd xmm7, xmm3 |
| movdqa xmm2, xmm6 |
| movdqa xmm3, xmm7 |
| pmaddwd xmm6, [GOTOFF(ebx,PW_MF060_MF050)] ; xmm6=(tmp2L) |
| pmaddwd xmm7, [GOTOFF(ebx,PW_MF060_MF050)] ; xmm7=(tmp2H) |
| pmaddwd xmm2, [GOTOFF(ebx,PW_F145_MF021)] ; xmm2=(tmp0L) |
| pmaddwd xmm3, [GOTOFF(ebx,PW_F145_MF021)] ; xmm3=(tmp0H) |
| |
| paddd xmm6, xmm4 ; xmm6=tmp2L |
| paddd xmm7, xmm5 ; xmm7=tmp2H |
| paddd xmm2, xmm0 ; xmm2=tmp0L |
| paddd xmm3, xmm1 ; xmm3=tmp0H |
| |
| movdqa XMMWORD [wk(0)], xmm2 ; wk(0)=tmp0L |
| movdqa XMMWORD [wk(1)], xmm3 ; wk(1)=tmp0H |
| |
| ; -- Even part |
| |
| movdqa xmm4, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_JCOEF)] |
| movdqa xmm5, XMMWORD [XMMBLOCK(2,0,esi,SIZEOF_JCOEF)] |
| movdqa xmm0, XMMWORD [XMMBLOCK(6,0,esi,SIZEOF_JCOEF)] |
| pmullw xmm4, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)] |
| pmullw xmm5, XMMWORD [XMMBLOCK(2,0,edx,SIZEOF_ISLOW_MULT_TYPE)] |
| pmullw xmm0, XMMWORD [XMMBLOCK(6,0,edx,SIZEOF_ISLOW_MULT_TYPE)] |
| |
| pxor xmm1, xmm1 |
| pxor xmm2, xmm2 |
| punpcklwd xmm1, xmm4 ; xmm1=tmp0L |
| punpckhwd xmm2, xmm4 ; xmm2=tmp0H |
| psrad xmm1, (16-CONST_BITS-1) ; psrad xmm1,16 & pslld xmm1,CONST_BITS+1 |
| psrad xmm2, (16-CONST_BITS-1) ; psrad xmm2,16 & pslld xmm2,CONST_BITS+1 |
| |
| movdqa xmm3, xmm5 ; xmm5=in2=z2 |
| punpcklwd xmm5, xmm0 ; xmm0=in6=z3 |
| punpckhwd xmm3, xmm0 |
| pmaddwd xmm5, [GOTOFF(ebx,PW_F184_MF076)] ; xmm5=tmp2L |
| pmaddwd xmm3, [GOTOFF(ebx,PW_F184_MF076)] ; xmm3=tmp2H |
| |
| movdqa xmm4, xmm1 |
| movdqa xmm0, xmm2 |
| paddd xmm1, xmm5 ; xmm1=tmp10L |
| paddd xmm2, xmm3 ; xmm2=tmp10H |
| psubd xmm4, xmm5 ; xmm4=tmp12L |
| psubd xmm0, xmm3 ; xmm0=tmp12H |
| |
| ; -- Final output stage |
| |
| movdqa xmm5, xmm1 |
| movdqa xmm3, xmm2 |
| paddd xmm1, xmm6 ; xmm1=data0L |
| paddd xmm2, xmm7 ; xmm2=data0H |
| psubd xmm5, xmm6 ; xmm5=data3L |
| psubd xmm3, xmm7 ; xmm3=data3H |
| |
| movdqa xmm6, [GOTOFF(ebx,PD_DESCALE_P1_4)] ; xmm6=[PD_DESCALE_P1_4] |
| |
| paddd xmm1, xmm6 |
| paddd xmm2, xmm6 |
| psrad xmm1, DESCALE_P1_4 |
| psrad xmm2, DESCALE_P1_4 |
| paddd xmm5, xmm6 |
| paddd xmm3, xmm6 |
| psrad xmm5, DESCALE_P1_4 |
| psrad xmm3, DESCALE_P1_4 |
| |
| packssdw xmm1, xmm2 ; xmm1=data0=(00 01 02 03 04 05 06 07) |
| packssdw xmm5, xmm3 ; xmm5=data3=(30 31 32 33 34 35 36 37) |
| |
| movdqa xmm7, XMMWORD [wk(0)] ; xmm7=tmp0L |
| movdqa xmm6, XMMWORD [wk(1)] ; xmm6=tmp0H |
| |
| movdqa xmm2, xmm4 |
| movdqa xmm3, xmm0 |
| paddd xmm4, xmm7 ; xmm4=data1L |
| paddd xmm0, xmm6 ; xmm0=data1H |
| psubd xmm2, xmm7 ; xmm2=data2L |
| psubd xmm3, xmm6 ; xmm3=data2H |
| |
| movdqa xmm7, [GOTOFF(ebx,PD_DESCALE_P1_4)] ; xmm7=[PD_DESCALE_P1_4] |
| |
| paddd xmm4, xmm7 |
| paddd xmm0, xmm7 |
| psrad xmm4, DESCALE_P1_4 |
| psrad xmm0, DESCALE_P1_4 |
| paddd xmm2, xmm7 |
| paddd xmm3, xmm7 |
| psrad xmm2, DESCALE_P1_4 |
| psrad xmm3, DESCALE_P1_4 |
| |
| packssdw xmm4, xmm0 ; xmm4=data1=(10 11 12 13 14 15 16 17) |
| packssdw xmm2, xmm3 ; xmm2=data2=(20 21 22 23 24 25 26 27) |
| |
| movdqa xmm6, xmm1 ; transpose coefficients(phase 1) |
| punpcklwd xmm1, xmm4 ; xmm1=(00 10 01 11 02 12 03 13) |
| punpckhwd xmm6, xmm4 ; xmm6=(04 14 05 15 06 16 07 17) |
| movdqa xmm7, xmm2 ; transpose coefficients(phase 1) |
| punpcklwd xmm2, xmm5 ; xmm2=(20 30 21 31 22 32 23 33) |
| punpckhwd xmm7, xmm5 ; xmm7=(24 34 25 35 26 36 27 37) |
| |
| movdqa xmm0, xmm1 ; transpose coefficients(phase 2) |
| punpckldq xmm1, xmm2 ; xmm1=[col0 col1]=(00 10 20 30 01 11 21 31) |
| punpckhdq xmm0, xmm2 ; xmm0=[col2 col3]=(02 12 22 32 03 13 23 33) |
| movdqa xmm3, xmm6 ; transpose coefficients(phase 2) |
| punpckldq xmm6, xmm7 ; xmm6=[col4 col5]=(04 14 24 34 05 15 25 35) |
| punpckhdq xmm3, xmm7 ; xmm3=[col6 col7]=(06 16 26 36 07 17 27 37) |
| .column_end: |
| |
| ; -- Prefetch the next coefficient block |
| |
| prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 0*32] |
| prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 1*32] |
| prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 2*32] |
| prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 3*32] |
| |
| ; ---- Pass 2: process rows, store into output array. |
| |
| mov eax, [original_ebp] |
| mov edi, JSAMPARRAY [output_buf(eax)] ; (JSAMPROW *) |
| mov eax, JDIMENSION [output_col(eax)] |
| |
| ; -- Even part |
| |
| pxor xmm4, xmm4 |
| punpcklwd xmm4, xmm1 ; xmm4=tmp0 |
| psrad xmm4, (16-CONST_BITS-1) ; psrad xmm4,16 & pslld xmm4,CONST_BITS+1 |
| |
| ; -- Odd part |
| |
| punpckhwd xmm1, xmm0 |
| punpckhwd xmm6, xmm3 |
| movdqa xmm5, xmm1 |
| movdqa xmm2, xmm6 |
| pmaddwd xmm1, [GOTOFF(ebx,PW_F256_F089)] ; xmm1=(tmp2) |
| pmaddwd xmm6, [GOTOFF(ebx,PW_MF060_MF050)] ; xmm6=(tmp2) |
| pmaddwd xmm5, [GOTOFF(ebx,PW_F106_MF217)] ; xmm5=(tmp0) |
| pmaddwd xmm2, [GOTOFF(ebx,PW_F145_MF021)] ; xmm2=(tmp0) |
| |
| paddd xmm6, xmm1 ; xmm6=tmp2 |
| paddd xmm2, xmm5 ; xmm2=tmp0 |
| |
| ; -- Even part |
| |
| punpcklwd xmm0, xmm3 |
| pmaddwd xmm0, [GOTOFF(ebx,PW_F184_MF076)] ; xmm0=tmp2 |
| |
| movdqa xmm7, xmm4 |
| paddd xmm4, xmm0 ; xmm4=tmp10 |
| psubd xmm7, xmm0 ; xmm7=tmp12 |
| |
| ; -- Final output stage |
| |
| movdqa xmm1, [GOTOFF(ebx,PD_DESCALE_P2_4)] ; xmm1=[PD_DESCALE_P2_4] |
| |
| movdqa xmm5, xmm4 |
| movdqa xmm3, xmm7 |
| paddd xmm4, xmm6 ; xmm4=data0=(00 10 20 30) |
| paddd xmm7, xmm2 ; xmm7=data1=(01 11 21 31) |
| psubd xmm5, xmm6 ; xmm5=data3=(03 13 23 33) |
| psubd xmm3, xmm2 ; xmm3=data2=(02 12 22 32) |
| |
| paddd xmm4, xmm1 |
| paddd xmm7, xmm1 |
| psrad xmm4, DESCALE_P2_4 |
| psrad xmm7, DESCALE_P2_4 |
| paddd xmm5, xmm1 |
| paddd xmm3, xmm1 |
| psrad xmm5, DESCALE_P2_4 |
| psrad xmm3, DESCALE_P2_4 |
| |
| packssdw xmm4, xmm3 ; xmm4=(00 10 20 30 02 12 22 32) |
| packssdw xmm7, xmm5 ; xmm7=(01 11 21 31 03 13 23 33) |
| |
| movdqa xmm0, xmm4 ; transpose coefficients(phase 1) |
| punpcklwd xmm4, xmm7 ; xmm4=(00 01 10 11 20 21 30 31) |
| punpckhwd xmm0, xmm7 ; xmm0=(02 03 12 13 22 23 32 33) |
| |
| movdqa xmm6, xmm4 ; transpose coefficients(phase 2) |
| punpckldq xmm4, xmm0 ; xmm4=(00 01 02 03 10 11 12 13) |
| punpckhdq xmm6, xmm0 ; xmm6=(20 21 22 23 30 31 32 33) |
| |
| packsswb xmm4, xmm6 ; xmm4=(00 01 02 03 10 11 12 13 20 ..) |
| paddb xmm4, [GOTOFF(ebx,PB_CENTERJSAMP)] |
| |
| pshufd xmm2, xmm4, 0x39 ; xmm2=(10 11 12 13 20 21 22 23 30 ..) |
| pshufd xmm1, xmm4, 0x4E ; xmm1=(20 21 22 23 30 31 32 33 00 ..) |
| pshufd xmm3, xmm4, 0x93 ; xmm3=(30 31 32 33 00 01 02 03 10 ..) |
| |
| mov edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW] |
| mov esi, JSAMPROW [edi+1*SIZEOF_JSAMPROW] |
| movd XMM_DWORD [edx+eax*SIZEOF_JSAMPLE], xmm4 |
| movd XMM_DWORD [esi+eax*SIZEOF_JSAMPLE], xmm2 |
| mov edx, JSAMPROW [edi+2*SIZEOF_JSAMPROW] |
| mov esi, JSAMPROW [edi+3*SIZEOF_JSAMPROW] |
| movd XMM_DWORD [edx+eax*SIZEOF_JSAMPLE], xmm1 |
| movd XMM_DWORD [esi+eax*SIZEOF_JSAMPLE], xmm3 |
| |
| pop edi |
| pop esi |
| ; pop edx ; need not be preserved |
| ; pop ecx ; unused |
| 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_sse2(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 32 |
| GLOBAL_FUNCTION(jsimd_idct_2x2_sse2) |
| |
| EXTN(jsimd_idct_2x2_sse2): |
| 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 |
| |
| movdqa xmm0, XMMWORD [XMMBLOCK(1,0,esi,SIZEOF_JCOEF)] |
| movdqa xmm1, XMMWORD [XMMBLOCK(3,0,esi,SIZEOF_JCOEF)] |
| pmullw xmm0, XMMWORD [XMMBLOCK(1,0,edx,SIZEOF_ISLOW_MULT_TYPE)] |
| pmullw xmm1, XMMWORD [XMMBLOCK(3,0,edx,SIZEOF_ISLOW_MULT_TYPE)] |
| movdqa xmm2, XMMWORD [XMMBLOCK(5,0,esi,SIZEOF_JCOEF)] |
| movdqa xmm3, XMMWORD [XMMBLOCK(7,0,esi,SIZEOF_JCOEF)] |
| pmullw xmm2, XMMWORD [XMMBLOCK(5,0,edx,SIZEOF_ISLOW_MULT_TYPE)] |
| pmullw xmm3, XMMWORD [XMMBLOCK(7,0,edx,SIZEOF_ISLOW_MULT_TYPE)] |
| |
| ; xmm0=(10 11 ** 13 ** 15 ** 17), xmm1=(30 31 ** 33 ** 35 ** 37) |
| ; xmm2=(50 51 ** 53 ** 55 ** 57), xmm3=(70 71 ** 73 ** 75 ** 77) |
| |
| pcmpeqd xmm7, xmm7 |
| pslld xmm7, WORD_BIT ; xmm7={0x0000 0xFFFF 0x0000 0xFFFF ..} |
| |
| movdqa xmm4, xmm0 ; xmm4=(10 11 ** 13 ** 15 ** 17) |
| movdqa xmm5, xmm2 ; xmm5=(50 51 ** 53 ** 55 ** 57) |
| punpcklwd xmm4, xmm1 ; xmm4=(10 30 11 31 ** ** 13 33) |
| punpcklwd xmm5, xmm3 ; xmm5=(50 70 51 71 ** ** 53 73) |
| pmaddwd xmm4, [GOTOFF(ebx,PW_F362_MF127)] |
| pmaddwd xmm5, [GOTOFF(ebx,PW_F085_MF072)] |
| |
| psrld xmm0, WORD_BIT ; xmm0=(11 -- 13 -- 15 -- 17 --) |
| pand xmm1, xmm7 ; xmm1=(-- 31 -- 33 -- 35 -- 37) |
| psrld xmm2, WORD_BIT ; xmm2=(51 -- 53 -- 55 -- 57 --) |
| pand xmm3, xmm7 ; xmm3=(-- 71 -- 73 -- 75 -- 77) |
| por xmm0, xmm1 ; xmm0=(11 31 13 33 15 35 17 37) |
| por xmm2, xmm3 ; xmm2=(51 71 53 73 55 75 57 77) |
| pmaddwd xmm0, [GOTOFF(ebx,PW_F362_MF127)] |
| pmaddwd xmm2, [GOTOFF(ebx,PW_F085_MF072)] |
| |
| paddd xmm4, xmm5 ; xmm4=tmp0[col0 col1 **** col3] |
| paddd xmm0, xmm2 ; xmm0=tmp0[col1 col3 col5 col7] |
| |
| ; -- Even part |
| |
| movdqa xmm6, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_JCOEF)] |
| pmullw xmm6, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)] |
| |
| ; xmm6=(00 01 ** 03 ** 05 ** 07) |
| |
| movdqa xmm1, xmm6 ; xmm1=(00 01 ** 03 ** 05 ** 07) |
| pslld xmm6, WORD_BIT ; xmm6=(-- 00 -- ** -- ** -- **) |
| pand xmm1, xmm7 ; xmm1=(-- 01 -- 03 -- 05 -- 07) |
| psrad xmm6, (WORD_BIT-CONST_BITS-2) ; xmm6=tmp10[col0 **** **** ****] |
| psrad xmm1, (WORD_BIT-CONST_BITS-2) ; xmm1=tmp10[col1 col3 col5 col7] |
| |
| ; -- Final output stage |
| |
| movdqa xmm3, xmm6 |
| movdqa xmm5, xmm1 |
| paddd xmm6, xmm4 ; xmm6=data0[col0 **** **** ****]=(A0 ** ** **) |
| paddd xmm1, xmm0 ; xmm1=data0[col1 col3 col5 col7]=(A1 A3 A5 A7) |
| psubd xmm3, xmm4 ; xmm3=data1[col0 **** **** ****]=(B0 ** ** **) |
| psubd xmm5, xmm0 ; xmm5=data1[col1 col3 col5 col7]=(B1 B3 B5 B7) |
| |
| movdqa xmm2, [GOTOFF(ebx,PD_DESCALE_P1_2)] ; xmm2=[PD_DESCALE_P1_2] |
| |
| punpckldq xmm6, xmm3 ; xmm6=(A0 B0 ** **) |
| |
| movdqa xmm7, xmm1 |
| punpcklqdq xmm1, xmm5 ; xmm1=(A1 A3 B1 B3) |
| punpckhqdq xmm7, xmm5 ; xmm7=(A5 A7 B5 B7) |
| |
| paddd xmm6, xmm2 |
| psrad xmm6, DESCALE_P1_2 |
| |
| paddd xmm1, xmm2 |
| paddd xmm7, xmm2 |
| psrad xmm1, DESCALE_P1_2 |
| psrad xmm7, DESCALE_P1_2 |
| |
| ; -- Prefetch the next coefficient block |
| |
| prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 0*32] |
| prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 1*32] |
| prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 2*32] |
| prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 3*32] |
| |
| ; ---- 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 xmm1, xmm1 ; xmm1=(A1 A3 B1 B3 A1 A3 B1 B3) |
| packssdw xmm7, xmm7 ; xmm7=(A5 A7 B5 B7 A5 A7 B5 B7) |
| pmaddwd xmm1, [GOTOFF(ebx,PW_F362_MF127)] |
| pmaddwd xmm7, [GOTOFF(ebx,PW_F085_MF072)] |
| |
| paddd xmm1, xmm7 ; xmm1=tmp0[row0 row1 row0 row1] |
| |
| ; -- Even part |
| |
| pslld xmm6, (CONST_BITS+2) ; xmm6=tmp10[row0 row1 **** ****] |
| |
| ; -- Final output stage |
| |
| movdqa xmm4, xmm6 |
| paddd xmm6, xmm1 ; xmm6=data0[row0 row1 **** ****]=(C0 C1 ** **) |
| psubd xmm4, xmm1 ; xmm4=data1[row0 row1 **** ****]=(D0 D1 ** **) |
| |
| punpckldq xmm6, xmm4 ; xmm6=(C0 D0 C1 D1) |
| |
| paddd xmm6, [GOTOFF(ebx,PD_DESCALE_P2_2)] |
| psrad xmm6, DESCALE_P2_2 |
| |
| packssdw xmm6, xmm6 ; xmm6=(C0 D0 C1 D1 C0 D0 C1 D1) |
| packsswb xmm6, xmm6 ; xmm6=(C0 D0 C1 D1 C0 D0 C1 D1 ..) |
| paddb xmm6, [GOTOFF(ebx,PB_CENTERJSAMP)] |
| |
| pextrw ebx, xmm6, 0x00 ; ebx=(C0 D0 -- --) |
| pextrw ecx, xmm6, 0x01 ; 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 |
| |
| 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 32 |
