| ; |
| ; jidctfst.asm - fast integer 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 a fast, not so accurate integer implementation of |
| ; the inverse DCT (Discrete Cosine Transform). The following code is |
| ; based directly on the IJG's original jidctfst.c; see the jidctfst.c |
| ; for more details. |
| ; |
| ; [TAB8] |
| |
| %include "jsimdext.inc" |
| %include "jdct.inc" |
| |
| ; -------------------------------------------------------------------------- |
| |
| %define CONST_BITS 8 ; 14 is also OK. |
| %define PASS1_BITS 2 |
| |
| %if IFAST_SCALE_BITS != PASS1_BITS |
| %error "'IFAST_SCALE_BITS' must be equal to 'PASS1_BITS'." |
| %endif |
| |
| %if CONST_BITS == 8 |
| F_1_082 equ 277 ; FIX(1.082392200) |
| F_1_414 equ 362 ; FIX(1.414213562) |
| F_1_847 equ 473 ; FIX(1.847759065) |
| F_2_613 equ 669 ; FIX(2.613125930) |
| F_1_613 equ (F_2_613 - 256) ; FIX(2.613125930) - FIX(1) |
| %else |
| ; NASM cannot do compile-time arithmetic on floating-point constants. |
| %define DESCALE(x, n) (((x) + (1 << ((n) - 1))) >> (n)) |
| F_1_082 equ DESCALE(1162209775, 30 - CONST_BITS) ; FIX(1.082392200) |
| F_1_414 equ DESCALE(1518500249, 30 - CONST_BITS) ; FIX(1.414213562) |
| F_1_847 equ DESCALE(1984016188, 30 - CONST_BITS) ; FIX(1.847759065) |
| F_2_613 equ DESCALE(2805822602, 30 - CONST_BITS) ; FIX(2.613125930) |
| F_1_613 equ (F_2_613 - (1 << CONST_BITS)) ; FIX(2.613125930) - FIX(1) |
| %endif |
| |
| ; -------------------------------------------------------------------------- |
| SECTION SEG_CONST |
| |
| ; PRE_MULTIPLY_SCALE_BITS <= 2 (to avoid overflow) |
| ; CONST_BITS + CONST_SHIFT + PRE_MULTIPLY_SCALE_BITS == 16 (for pmulhw) |
| |
| %define PRE_MULTIPLY_SCALE_BITS 2 |
| %define CONST_SHIFT (16 - PRE_MULTIPLY_SCALE_BITS - CONST_BITS) |
| |
| alignz 32 |
| GLOBAL_DATA(jconst_idct_ifast_sse2) |
| |
| EXTN(jconst_idct_ifast_sse2): |
| |
| PW_F1414 times 8 dw F_1_414 << CONST_SHIFT |
| PW_F1847 times 8 dw F_1_847 << CONST_SHIFT |
| PW_MF1613 times 8 dw -F_1_613 << CONST_SHIFT |
| PW_F1082 times 8 dw F_1_082 << CONST_SHIFT |
| PB_CENTERJSAMP times 16 db CENTERJSAMPLE |
| |
| alignz 32 |
| |
| ; -------------------------------------------------------------------------- |
| SECTION SEG_TEXT |
| BITS 32 |
| ; |
| ; Perform dequantization and inverse DCT on one block of coefficients. |
| ; |
| ; GLOBAL(void) |
| ; jsimd_idct_ifast_sse2(void *dct_table, JCOEFPTR coef_block, |
| ; JSAMPARRAY output_buf, JDIMENSION output_col) |
| ; |
| |
| %define dct_table(b) (b) + 8 ; jpeg_component_info *compptr |
| %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_ifast_sse2) |
| |
| EXTN(jsimd_idct_ifast_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_IFAST_SSE2 |
| mov eax, DWORD [DWBLOCK(1,0,esi,SIZEOF_JCOEF)] |
| or eax, DWORD [DWBLOCK(2,0,esi,SIZEOF_JCOEF)] |
| jnz near .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(4,0,esi,SIZEOF_JCOEF)] |
| por xmm0, XMMWORD [XMMBLOCK(5,0,esi,SIZEOF_JCOEF)] |
| por xmm1, XMMWORD [XMMBLOCK(6,0,esi,SIZEOF_JCOEF)] |
| por xmm0, XMMWORD [XMMBLOCK(7,0,esi,SIZEOF_JCOEF)] |
| por xmm1, xmm0 |
| packsswb xmm1, xmm1 |
| packsswb xmm1, xmm1 |
| movd eax, xmm1 |
| 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)] |
| |
| movdqa xmm7, xmm0 ; xmm0=in0=(00 01 02 03 04 05 06 07) |
| punpcklwd xmm0, xmm0 ; xmm0=(00 00 01 01 02 02 03 03) |
| punpckhwd xmm7, xmm7 ; xmm7=(04 04 05 05 06 06 07 07) |
| |
| pshufd xmm6, xmm0, 0x00 ; xmm6=col0=(00 00 00 00 00 00 00 00) |
| pshufd xmm2, xmm0, 0x55 ; xmm2=col1=(01 01 01 01 01 01 01 01) |
| pshufd xmm5, xmm0, 0xAA ; xmm5=col2=(02 02 02 02 02 02 02 02) |
| pshufd xmm0, xmm0, 0xFF ; xmm0=col3=(03 03 03 03 03 03 03 03) |
| pshufd xmm1, xmm7, 0x00 ; xmm1=col4=(04 04 04 04 04 04 04 04) |
| pshufd xmm4, xmm7, 0x55 ; xmm4=col5=(05 05 05 05 05 05 05 05) |
| pshufd xmm3, xmm7, 0xAA ; xmm3=col6=(06 06 06 06 06 06 06 06) |
| pshufd xmm7, xmm7, 0xFF ; xmm7=col7=(07 07 07 07 07 07 07 07) |
| |
| movdqa XMMWORD [wk(0)], xmm2 ; wk(0)=col1 |
| movdqa XMMWORD [wk(1)], xmm0 ; wk(1)=col3 |
| jmp near .column_end |
| alignx 16, 7 |
| %endif |
| .columnDCT: |
| |
| ; -- Even part |
| |
| movdqa xmm0, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_JCOEF)] |
| movdqa xmm1, XMMWORD [XMMBLOCK(2,0,esi,SIZEOF_JCOEF)] |
| pmullw xmm0, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_IFAST_MULT_TYPE)] |
| pmullw xmm1, XMMWORD [XMMBLOCK(2,0,edx,SIZEOF_IFAST_MULT_TYPE)] |
| movdqa xmm2, XMMWORD [XMMBLOCK(4,0,esi,SIZEOF_JCOEF)] |
| movdqa xmm3, XMMWORD [XMMBLOCK(6,0,esi,SIZEOF_JCOEF)] |
| pmullw xmm2, XMMWORD [XMMBLOCK(4,0,edx,SIZEOF_IFAST_MULT_TYPE)] |
| pmullw xmm3, XMMWORD [XMMBLOCK(6,0,edx,SIZEOF_IFAST_MULT_TYPE)] |
| |
| movdqa xmm4, xmm0 |
| movdqa xmm5, xmm1 |
| psubw xmm0, xmm2 ; xmm0=tmp11 |
| psubw xmm1, xmm3 |
| paddw xmm4, xmm2 ; xmm4=tmp10 |
| paddw xmm5, xmm3 ; xmm5=tmp13 |
| |
| psllw xmm1, PRE_MULTIPLY_SCALE_BITS |
| pmulhw xmm1, [GOTOFF(ebx,PW_F1414)] |
| psubw xmm1, xmm5 ; xmm1=tmp12 |
| |
| movdqa xmm6, xmm4 |
| movdqa xmm7, xmm0 |
| psubw xmm4, xmm5 ; xmm4=tmp3 |
| psubw xmm0, xmm1 ; xmm0=tmp2 |
| paddw xmm6, xmm5 ; xmm6=tmp0 |
| paddw xmm7, xmm1 ; xmm7=tmp1 |
| |
| movdqa XMMWORD [wk(1)], xmm4 ; wk(1)=tmp3 |
| movdqa XMMWORD [wk(0)], xmm0 ; wk(0)=tmp2 |
| |
| ; -- Odd part |
| |
| movdqa xmm2, XMMWORD [XMMBLOCK(1,0,esi,SIZEOF_JCOEF)] |
| movdqa xmm3, XMMWORD [XMMBLOCK(3,0,esi,SIZEOF_JCOEF)] |
| pmullw xmm2, XMMWORD [XMMBLOCK(1,0,edx,SIZEOF_IFAST_MULT_TYPE)] |
| pmullw xmm3, XMMWORD [XMMBLOCK(3,0,edx,SIZEOF_IFAST_MULT_TYPE)] |
| movdqa xmm5, XMMWORD [XMMBLOCK(5,0,esi,SIZEOF_JCOEF)] |
| movdqa xmm1, XMMWORD [XMMBLOCK(7,0,esi,SIZEOF_JCOEF)] |
| pmullw xmm5, XMMWORD [XMMBLOCK(5,0,edx,SIZEOF_IFAST_MULT_TYPE)] |
| pmullw xmm1, XMMWORD [XMMBLOCK(7,0,edx,SIZEOF_IFAST_MULT_TYPE)] |
| |
| movdqa xmm4, xmm2 |
| movdqa xmm0, xmm5 |
| psubw xmm2, xmm1 ; xmm2=z12 |
| psubw xmm5, xmm3 ; xmm5=z10 |
| paddw xmm4, xmm1 ; xmm4=z11 |
| paddw xmm0, xmm3 ; xmm0=z13 |
| |
| movdqa xmm1, xmm5 ; xmm1=z10(unscaled) |
| psllw xmm2, PRE_MULTIPLY_SCALE_BITS |
| psllw xmm5, PRE_MULTIPLY_SCALE_BITS |
| |
| movdqa xmm3, xmm4 |
| psubw xmm4, xmm0 |
| paddw xmm3, xmm0 ; xmm3=tmp7 |
| |
| psllw xmm4, PRE_MULTIPLY_SCALE_BITS |
| pmulhw xmm4, [GOTOFF(ebx,PW_F1414)] ; xmm4=tmp11 |
| |
| ; To avoid overflow... |
| ; |
| ; (Original) |
| ; tmp12 = -2.613125930 * z10 + z5; |
| ; |
| ; (This implementation) |
| ; tmp12 = (-1.613125930 - 1) * z10 + z5; |
| ; = -1.613125930 * z10 - z10 + z5; |
| |
| movdqa xmm0, xmm5 |
| paddw xmm5, xmm2 |
| pmulhw xmm5, [GOTOFF(ebx,PW_F1847)] ; xmm5=z5 |
| pmulhw xmm0, [GOTOFF(ebx,PW_MF1613)] |
| pmulhw xmm2, [GOTOFF(ebx,PW_F1082)] |
| psubw xmm0, xmm1 |
| psubw xmm2, xmm5 ; xmm2=tmp10 |
| paddw xmm0, xmm5 ; xmm0=tmp12 |
| |
| ; -- Final output stage |
| |
| psubw xmm0, xmm3 ; xmm0=tmp6 |
| movdqa xmm1, xmm6 |
| movdqa xmm5, xmm7 |
| paddw xmm6, xmm3 ; xmm6=data0=(00 01 02 03 04 05 06 07) |
| paddw xmm7, xmm0 ; xmm7=data1=(10 11 12 13 14 15 16 17) |
| psubw xmm1, xmm3 ; xmm1=data7=(70 71 72 73 74 75 76 77) |
| psubw xmm5, xmm0 ; xmm5=data6=(60 61 62 63 64 65 66 67) |
| psubw xmm4, xmm0 ; xmm4=tmp5 |
| |
| movdqa xmm3, xmm6 ; transpose coefficients(phase 1) |
| punpcklwd xmm6, xmm7 ; xmm6=(00 10 01 11 02 12 03 13) |
| punpckhwd xmm3, xmm7 ; xmm3=(04 14 05 15 06 16 07 17) |
| movdqa xmm0, xmm5 ; transpose coefficients(phase 1) |
| punpcklwd xmm5, xmm1 ; xmm5=(60 70 61 71 62 72 63 73) |
| punpckhwd xmm0, xmm1 ; xmm0=(64 74 65 75 66 76 67 77) |
| |
| movdqa xmm7, XMMWORD [wk(0)] ; xmm7=tmp2 |
| movdqa xmm1, XMMWORD [wk(1)] ; xmm1=tmp3 |
| |
| movdqa XMMWORD [wk(0)], xmm5 ; wk(0)=(60 70 61 71 62 72 63 73) |
| movdqa XMMWORD [wk(1)], xmm0 ; wk(1)=(64 74 65 75 66 76 67 77) |
| |
| paddw xmm2, xmm4 ; xmm2=tmp4 |
| movdqa xmm5, xmm7 |
| movdqa xmm0, xmm1 |
| paddw xmm7, xmm4 ; xmm7=data2=(20 21 22 23 24 25 26 27) |
| paddw xmm1, xmm2 ; xmm1=data4=(40 41 42 43 44 45 46 47) |
| psubw xmm5, xmm4 ; xmm5=data5=(50 51 52 53 54 55 56 57) |
| psubw xmm0, xmm2 ; xmm0=data3=(30 31 32 33 34 35 36 37) |
| |
| movdqa xmm4, xmm7 ; transpose coefficients(phase 1) |
| punpcklwd xmm7, xmm0 ; xmm7=(20 30 21 31 22 32 23 33) |
| punpckhwd xmm4, xmm0 ; xmm4=(24 34 25 35 26 36 27 37) |
| movdqa xmm2, xmm1 ; transpose coefficients(phase 1) |
| punpcklwd xmm1, xmm5 ; xmm1=(40 50 41 51 42 52 43 53) |
| punpckhwd xmm2, xmm5 ; xmm2=(44 54 45 55 46 56 47 57) |
| |
| movdqa xmm0, xmm3 ; transpose coefficients(phase 2) |
| punpckldq xmm3, xmm4 ; xmm3=(04 14 24 34 05 15 25 35) |
| punpckhdq xmm0, xmm4 ; xmm0=(06 16 26 36 07 17 27 37) |
| movdqa xmm5, xmm6 ; transpose coefficients(phase 2) |
| punpckldq xmm6, xmm7 ; xmm6=(00 10 20 30 01 11 21 31) |
| punpckhdq xmm5, xmm7 ; xmm5=(02 12 22 32 03 13 23 33) |
| |
| movdqa xmm4, XMMWORD [wk(0)] ; xmm4=(60 70 61 71 62 72 63 73) |
| movdqa xmm7, XMMWORD [wk(1)] ; xmm7=(64 74 65 75 66 76 67 77) |
| |
| movdqa XMMWORD [wk(0)], xmm3 ; wk(0)=(04 14 24 34 05 15 25 35) |
| movdqa XMMWORD [wk(1)], xmm0 ; wk(1)=(06 16 26 36 07 17 27 37) |
| |
| movdqa xmm3, xmm1 ; transpose coefficients(phase 2) |
| punpckldq xmm1, xmm4 ; xmm1=(40 50 60 70 41 51 61 71) |
| punpckhdq xmm3, xmm4 ; xmm3=(42 52 62 72 43 53 63 73) |
| movdqa xmm0, xmm2 ; transpose coefficients(phase 2) |
| punpckldq xmm2, xmm7 ; xmm2=(44 54 64 74 45 55 65 75) |
| punpckhdq xmm0, xmm7 ; xmm0=(46 56 66 76 47 57 67 77) |
| |
| movdqa xmm4, xmm6 ; transpose coefficients(phase 3) |
| punpcklqdq xmm6, xmm1 ; xmm6=col0=(00 10 20 30 40 50 60 70) |
| punpckhqdq xmm4, xmm1 ; xmm4=col1=(01 11 21 31 41 51 61 71) |
| movdqa xmm7, xmm5 ; transpose coefficients(phase 3) |
| punpcklqdq xmm5, xmm3 ; xmm5=col2=(02 12 22 32 42 52 62 72) |
| punpckhqdq xmm7, xmm3 ; xmm7=col3=(03 13 23 33 43 53 63 73) |
| |
| movdqa xmm1, XMMWORD [wk(0)] ; xmm1=(04 14 24 34 05 15 25 35) |
| movdqa xmm3, XMMWORD [wk(1)] ; xmm3=(06 16 26 36 07 17 27 37) |
| |
| movdqa XMMWORD [wk(0)], xmm4 ; wk(0)=col1 |
| movdqa XMMWORD [wk(1)], xmm7 ; wk(1)=col3 |
| |
| movdqa xmm4, xmm1 ; transpose coefficients(phase 3) |
| punpcklqdq xmm1, xmm2 ; xmm1=col4=(04 14 24 34 44 54 64 74) |
| punpckhqdq xmm4, xmm2 ; xmm4=col5=(05 15 25 35 45 55 65 75) |
| movdqa xmm7, xmm3 ; transpose coefficients(phase 3) |
| punpcklqdq xmm3, xmm0 ; xmm3=col6=(06 16 26 36 46 56 66 76) |
| punpckhqdq xmm7, xmm0 ; xmm7=col7=(07 17 27 37 47 57 67 77) |
| .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 from work array, store into output array. |
| |
| mov eax, [original_ebp] |
| mov edi, JSAMPARRAY [output_buf(eax)] ; (JSAMPROW *) |
| mov eax, JDIMENSION [output_col(eax)] |
| |
| ; -- Even part |
| |
| ; xmm6=col0, xmm5=col2, xmm1=col4, xmm3=col6 |
| |
| movdqa xmm2, xmm6 |
| movdqa xmm0, xmm5 |
| psubw xmm6, xmm1 ; xmm6=tmp11 |
| psubw xmm5, xmm3 |
| paddw xmm2, xmm1 ; xmm2=tmp10 |
| paddw xmm0, xmm3 ; xmm0=tmp13 |
| |
| psllw xmm5, PRE_MULTIPLY_SCALE_BITS |
| pmulhw xmm5, [GOTOFF(ebx,PW_F1414)] |
| psubw xmm5, xmm0 ; xmm5=tmp12 |
| |
| movdqa xmm1, xmm2 |
| movdqa xmm3, xmm6 |
| psubw xmm2, xmm0 ; xmm2=tmp3 |
| psubw xmm6, xmm5 ; xmm6=tmp2 |
| paddw xmm1, xmm0 ; xmm1=tmp0 |
| paddw xmm3, xmm5 ; xmm3=tmp1 |
| |
| movdqa xmm0, XMMWORD [wk(0)] ; xmm0=col1 |
| movdqa xmm5, XMMWORD [wk(1)] ; xmm5=col3 |
| |
| movdqa XMMWORD [wk(0)], xmm2 ; wk(0)=tmp3 |
| movdqa XMMWORD [wk(1)], xmm6 ; wk(1)=tmp2 |
| |
| ; -- Odd part |
| |
| ; xmm0=col1, xmm5=col3, xmm4=col5, xmm7=col7 |
| |
| movdqa xmm2, xmm0 |
| movdqa xmm6, xmm4 |
| psubw xmm0, xmm7 ; xmm0=z12 |
| psubw xmm4, xmm5 ; xmm4=z10 |
| paddw xmm2, xmm7 ; xmm2=z11 |
| paddw xmm6, xmm5 ; xmm6=z13 |
| |
| movdqa xmm7, xmm4 ; xmm7=z10(unscaled) |
| psllw xmm0, PRE_MULTIPLY_SCALE_BITS |
| psllw xmm4, PRE_MULTIPLY_SCALE_BITS |
| |
| movdqa xmm5, xmm2 |
| psubw xmm2, xmm6 |
| paddw xmm5, xmm6 ; xmm5=tmp7 |
| |
| psllw xmm2, PRE_MULTIPLY_SCALE_BITS |
| pmulhw xmm2, [GOTOFF(ebx,PW_F1414)] ; xmm2=tmp11 |
| |
| ; To avoid overflow... |
| ; |
| ; (Original) |
| ; tmp12 = -2.613125930 * z10 + z5; |
| ; |
| ; (This implementation) |
| ; tmp12 = (-1.613125930 - 1) * z10 + z5; |
| ; = -1.613125930 * z10 - z10 + z5; |
| |
| movdqa xmm6, xmm4 |
| paddw xmm4, xmm0 |
| pmulhw xmm4, [GOTOFF(ebx,PW_F1847)] ; xmm4=z5 |
| pmulhw xmm6, [GOTOFF(ebx,PW_MF1613)] |
| pmulhw xmm0, [GOTOFF(ebx,PW_F1082)] |
| psubw xmm6, xmm7 |
| psubw xmm0, xmm4 ; xmm0=tmp10 |
| paddw xmm6, xmm4 ; xmm6=tmp12 |
| |
| ; -- Final output stage |
| |
| psubw xmm6, xmm5 ; xmm6=tmp6 |
| movdqa xmm7, xmm1 |
| movdqa xmm4, xmm3 |
| paddw xmm1, xmm5 ; xmm1=data0=(00 10 20 30 40 50 60 70) |
| paddw xmm3, xmm6 ; xmm3=data1=(01 11 21 31 41 51 61 71) |
| psraw xmm1, (PASS1_BITS+3) ; descale |
| psraw xmm3, (PASS1_BITS+3) ; descale |
| psubw xmm7, xmm5 ; xmm7=data7=(07 17 27 37 47 57 67 77) |
| psubw xmm4, xmm6 ; xmm4=data6=(06 16 26 36 46 56 66 76) |
| psraw xmm7, (PASS1_BITS+3) ; descale |
| psraw xmm4, (PASS1_BITS+3) ; descale |
| psubw xmm2, xmm6 ; xmm2=tmp5 |
| |
| packsswb xmm1, xmm4 ; xmm1=(00 10 20 30 40 50 60 70 06 16 26 36 46 56 66 76) |
| packsswb xmm3, xmm7 ; xmm3=(01 11 21 31 41 51 61 71 07 17 27 37 47 57 67 77) |
| |
| movdqa xmm5, XMMWORD [wk(1)] ; xmm5=tmp2 |
| movdqa xmm6, XMMWORD [wk(0)] ; xmm6=tmp3 |
| |
| paddw xmm0, xmm2 ; xmm0=tmp4 |
| movdqa xmm4, xmm5 |
| movdqa xmm7, xmm6 |
| paddw xmm5, xmm2 ; xmm5=data2=(02 12 22 32 42 52 62 72) |
| paddw xmm6, xmm0 ; xmm6=data4=(04 14 24 34 44 54 64 74) |
| psraw xmm5, (PASS1_BITS+3) ; descale |
| psraw xmm6, (PASS1_BITS+3) ; descale |
| psubw xmm4, xmm2 ; xmm4=data5=(05 15 25 35 45 55 65 75) |
| psubw xmm7, xmm0 ; xmm7=data3=(03 13 23 33 43 53 63 73) |
| psraw xmm4, (PASS1_BITS+3) ; descale |
| psraw xmm7, (PASS1_BITS+3) ; descale |
| |
| movdqa xmm2, [GOTOFF(ebx,PB_CENTERJSAMP)] ; xmm2=[PB_CENTERJSAMP] |
| |
| packsswb xmm5, xmm6 ; xmm5=(02 12 22 32 42 52 62 72 04 14 24 34 44 54 64 74) |
| packsswb xmm7, xmm4 ; xmm7=(03 13 23 33 43 53 63 73 05 15 25 35 45 55 65 75) |
| |
| paddb xmm1, xmm2 |
| paddb xmm3, xmm2 |
| paddb xmm5, xmm2 |
| paddb xmm7, xmm2 |
| |
| movdqa xmm0, xmm1 ; transpose coefficients(phase 1) |
| punpcklbw xmm1, xmm3 ; xmm1=(00 01 10 11 20 21 30 31 40 41 50 51 60 61 70 71) |
| punpckhbw xmm0, xmm3 ; xmm0=(06 07 16 17 26 27 36 37 46 47 56 57 66 67 76 77) |
| movdqa xmm6, xmm5 ; transpose coefficients(phase 1) |
| punpcklbw xmm5, xmm7 ; xmm5=(02 03 12 13 22 23 32 33 42 43 52 53 62 63 72 73) |
| punpckhbw xmm6, xmm7 ; xmm6=(04 05 14 15 24 25 34 35 44 45 54 55 64 65 74 75) |
| |
| movdqa xmm4, xmm1 ; transpose coefficients(phase 2) |
| punpcklwd xmm1, xmm5 ; xmm1=(00 01 02 03 10 11 12 13 20 21 22 23 30 31 32 33) |
| punpckhwd xmm4, xmm5 ; xmm4=(40 41 42 43 50 51 52 53 60 61 62 63 70 71 72 73) |
| movdqa xmm2, xmm6 ; transpose coefficients(phase 2) |
| punpcklwd xmm6, xmm0 ; xmm6=(04 05 06 07 14 15 16 17 24 25 26 27 34 35 36 37) |
| punpckhwd xmm2, xmm0 ; xmm2=(44 45 46 47 54 55 56 57 64 65 66 67 74 75 76 77) |
| |
| movdqa xmm3, xmm1 ; transpose coefficients(phase 3) |
| punpckldq xmm1, xmm6 ; xmm1=(00 01 02 03 04 05 06 07 10 11 12 13 14 15 16 17) |
| punpckhdq xmm3, xmm6 ; xmm3=(20 21 22 23 24 25 26 27 30 31 32 33 34 35 36 37) |
| movdqa xmm7, xmm4 ; transpose coefficients(phase 3) |
| punpckldq xmm4, xmm2 ; xmm4=(40 41 42 43 44 45 46 47 50 51 52 53 54 55 56 57) |
| punpckhdq xmm7, xmm2 ; xmm7=(60 61 62 63 64 65 66 67 70 71 72 73 74 75 76 77) |
| |
| pshufd xmm5, xmm1, 0x4E ; xmm5=(10 11 12 13 14 15 16 17 00 01 02 03 04 05 06 07) |
| pshufd xmm0, xmm3, 0x4E ; xmm0=(30 31 32 33 34 35 36 37 20 21 22 23 24 25 26 27) |
| pshufd xmm6, xmm4, 0x4E ; xmm6=(50 51 52 53 54 55 56 57 40 41 42 43 44 45 46 47) |
| pshufd xmm2, xmm7, 0x4E ; xmm2=(70 71 72 73 74 75 76 77 60 61 62 63 64 65 66 67) |
| |
| mov edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW] |
| mov esi, JSAMPROW [edi+2*SIZEOF_JSAMPROW] |
| movq XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE], xmm1 |
| movq XMM_MMWORD [esi+eax*SIZEOF_JSAMPLE], xmm3 |
| mov edx, JSAMPROW [edi+4*SIZEOF_JSAMPROW] |
| mov esi, JSAMPROW [edi+6*SIZEOF_JSAMPROW] |
| movq XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE], xmm4 |
| movq XMM_MMWORD [esi+eax*SIZEOF_JSAMPLE], xmm7 |
| |
| mov edx, JSAMPROW [edi+1*SIZEOF_JSAMPROW] |
| mov esi, JSAMPROW [edi+3*SIZEOF_JSAMPROW] |
| movq XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE], xmm5 |
| movq XMM_MMWORD [esi+eax*SIZEOF_JSAMPLE], xmm0 |
| mov edx, JSAMPROW [edi+5*SIZEOF_JSAMPROW] |
| mov esi, JSAMPROW [edi+7*SIZEOF_JSAMPROW] |
| movq XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE], xmm6 |
| movq XMM_MMWORD [esi+eax*SIZEOF_JSAMPLE], xmm2 |
| |
| 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 |
| |
| ; For some reason, the OS X linker does not honor the request to align the |
| ; segment unless we do this. |
| align 32 |
