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mozjpeg/simd/i386/jidctint-avx2.asm
DRC 6e632af9f6 Demote "fast" [I]DCT algorithms to legacy status 
- Refer to the "slow" [I]DCT algorithms as "accurate" instead, since
  they are not slow under libjpeg-turbo.
- Adjust documentation claims to reflect the fact that the "slow" and
  "fast" algorithms produce about the same performance on AVX2-equipped
  CPUs (because of the dual-lane nature of AVX2, it was not possible to
  accelerate the "fast" algorithm beyond what was achievable with SSE2.)
  Also adjust the claims to reflect the fact that the "fast" algorithm
  tends to be ~5-15% faster than the "slow" algorithm on
  non-AVX2-equipped CPUs, regardless of the use of the libjpeg-turbo
  SIMD extensions.
- Indicate the legacy status of the "fast" and float algorithms in the
  documentation and cjpeg/djpeg usage info.
- Remove obsolete paragraph in the djpeg man page that suggested that
  the float algorithm could be faster than the "fast" algorithm on some
  CPUs.
2020-11-05 15:59:31 -06:00

454 lines
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NASM
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;
; jidctint.asm - accurate integer IDCT (AVX2)
;
; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
; Copyright (C) 2009, 2016, 2018, 2020, 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 slower but more accurate integer implementation of the
; inverse DCT (Discrete Cosine Transform). The following code is based
; directly on the IJG's original jidctint.c; see the jidctint.c for
; more details.
%include "jsimdext.inc"
%include "jdct.inc"
; --------------------------------------------------------------------------
%define CONST_BITS 13
%define PASS1_BITS 2
%define DESCALE_P1 (CONST_BITS - PASS1_BITS)
%define DESCALE_P2 (CONST_BITS + PASS1_BITS + 3)
%if CONST_BITS == 13
F_0_298 equ 2446 ; FIX(0.298631336)
F_0_390 equ 3196 ; FIX(0.390180644)
F_0_541 equ 4433 ; FIX(0.541196100)
F_0_765 equ 6270 ; FIX(0.765366865)
F_0_899 equ 7373 ; FIX(0.899976223)
F_1_175 equ 9633 ; FIX(1.175875602)
F_1_501 equ 12299 ; FIX(1.501321110)
F_1_847 equ 15137 ; FIX(1.847759065)
F_1_961 equ 16069 ; FIX(1.961570560)
F_2_053 equ 16819 ; FIX(2.053119869)
F_2_562 equ 20995 ; FIX(2.562915447)
F_3_072 equ 25172 ; FIX(3.072711026)
%else
; NASM cannot do compile-time arithmetic on floating-point constants.
%define DESCALE(x, n) (((x) + (1 << ((n) - 1))) >> (n))
F_0_298 equ DESCALE( 320652955, 30 - CONST_BITS) ; FIX(0.298631336)
F_0_390 equ DESCALE( 418953276, 30 - CONST_BITS) ; FIX(0.390180644)
F_0_541 equ DESCALE( 581104887, 30 - CONST_BITS) ; FIX(0.541196100)
F_0_765 equ DESCALE( 821806413, 30 - CONST_BITS) ; FIX(0.765366865)
F_0_899 equ DESCALE( 966342111, 30 - CONST_BITS) ; FIX(0.899976223)
F_1_175 equ DESCALE(1262586813, 30 - CONST_BITS) ; FIX(1.175875602)
F_1_501 equ DESCALE(1612031267, 30 - CONST_BITS) ; FIX(1.501321110)
F_1_847 equ DESCALE(1984016188, 30 - CONST_BITS) ; FIX(1.847759065)
F_1_961 equ DESCALE(2106220350, 30 - CONST_BITS) ; FIX(1.961570560)
F_2_053 equ DESCALE(2204520673, 30 - CONST_BITS) ; FIX(2.053119869)
F_2_562 equ DESCALE(2751909506, 30 - CONST_BITS) ; FIX(2.562915447)
F_3_072 equ DESCALE(3299298341, 30 - CONST_BITS) ; FIX(3.072711026)
%endif
; --------------------------------------------------------------------------
; In-place 8x8x16-bit inverse matrix transpose using AVX2 instructions
; %1-%4: Input/output registers
; %5-%8: Temp registers
%macro dotranspose 8
; %5=(00 10 20 30 40 50 60 70 01 11 21 31 41 51 61 71)
; %6=(03 13 23 33 43 53 63 73 02 12 22 32 42 52 62 72)
; %7=(04 14 24 34 44 54 64 74 05 15 25 35 45 55 65 75)
; %8=(07 17 27 37 47 57 67 77 06 16 26 36 46 56 66 76)
vpermq %5, %1, 0xD8
vpermq %6, %2, 0x72
vpermq %7, %3, 0xD8
vpermq %8, %4, 0x72
; transpose coefficients(phase 1)
; %5=(00 10 20 30 01 11 21 31 40 50 60 70 41 51 61 71)
; %6=(02 12 22 32 03 13 23 33 42 52 62 72 43 53 63 73)
; %7=(04 14 24 34 05 15 25 35 44 54 64 74 45 55 65 75)
; %8=(06 16 26 36 07 17 27 37 46 56 66 76 47 57 67 77)
vpunpcklwd %1, %5, %6
vpunpckhwd %2, %5, %6
vpunpcklwd %3, %7, %8
vpunpckhwd %4, %7, %8
; transpose coefficients(phase 2)
; %1=(00 02 10 12 20 22 30 32 40 42 50 52 60 62 70 72)
; %2=(01 03 11 13 21 23 31 33 41 43 51 53 61 63 71 73)
; %3=(04 06 14 16 24 26 34 36 44 46 54 56 64 66 74 76)
; %4=(05 07 15 17 25 27 35 37 45 47 55 57 65 67 75 77)
vpunpcklwd %5, %1, %2
vpunpcklwd %6, %3, %4
vpunpckhwd %7, %1, %2
vpunpckhwd %8, %3, %4
; transpose coefficients(phase 3)
; %5=(00 01 02 03 10 11 12 13 40 41 42 43 50 51 52 53)
; %6=(04 05 06 07 14 15 16 17 44 45 46 47 54 55 56 57)
; %7=(20 21 22 23 30 31 32 33 60 61 62 63 70 71 72 73)
; %8=(24 25 26 27 34 35 36 37 64 65 66 67 74 75 76 77)
vpunpcklqdq %1, %5, %6
vpunpckhqdq %2, %5, %6
vpunpcklqdq %3, %7, %8
vpunpckhqdq %4, %7, %8
; transpose coefficients(phase 4)
; %1=(00 01 02 03 04 05 06 07 40 41 42 43 44 45 46 47)
; %2=(10 11 12 13 14 15 16 17 50 51 52 53 54 55 56 57)
; %3=(20 21 22 23 24 25 26 27 60 61 62 63 64 65 66 67)
; %4=(30 31 32 33 34 35 36 37 70 71 72 73 74 75 76 77)
%endmacro
; --------------------------------------------------------------------------
; In-place 8x8x16-bit accurate integer inverse DCT using AVX2 instructions
; %1-%4: Input/output registers
; %5-%12: Temp registers
; %9: Pass (1 or 2)
%macro dodct 13
; -- Even part
; (Original)
; z1 = (z2 + z3) * 0.541196100;
; tmp2 = z1 + z3 * -1.847759065;
; tmp3 = z1 + z2 * 0.765366865;
;
; (This implementation)
; tmp2 = z2 * 0.541196100 + z3 * (0.541196100 - 1.847759065);
; tmp3 = z2 * (0.541196100 + 0.765366865) + z3 * 0.541196100;
vperm2i128 %6, %3, %3, 0x01 ; %6=in6_2
vpunpcklwd %5, %3, %6 ; %5=in26_62L
vpunpckhwd %6, %3, %6 ; %6=in26_62H
vpmaddwd %5, %5, [GOTOFF(ebx,PW_F130_F054_MF130_F054)] ; %5=tmp3_2L
vpmaddwd %6, %6, [GOTOFF(ebx,PW_F130_F054_MF130_F054)] ; %6=tmp3_2H
vperm2i128 %7, %1, %1, 0x01 ; %7=in4_0
vpsignw %1, %1, [GOTOFF(ebx,PW_1_NEG1)]
vpaddw %7, %7, %1 ; %7=(in0+in4)_(in0-in4)
vpxor %1, %1, %1
vpunpcklwd %8, %1, %7 ; %8=tmp0_1L
vpunpckhwd %1, %1, %7 ; %1=tmp0_1H
vpsrad %8, %8, (16-CONST_BITS) ; vpsrad %8,16 & vpslld %8,CONST_BITS
vpsrad %1, %1, (16-CONST_BITS) ; vpsrad %1,16 & vpslld %1,CONST_BITS
vpsubd %3, %8, %5
vmovdqu %11, %3 ; %11=tmp0_1L-tmp3_2L=tmp13_12L
vpaddd %3, %8, %5
vmovdqu %9, %3 ; %9=tmp0_1L+tmp3_2L=tmp10_11L
vpsubd %3, %1, %6
vmovdqu %12, %3 ; %12=tmp0_1H-tmp3_2H=tmp13_12H
vpaddd %3, %1, %6
vmovdqu %10, %3 ; %10=tmp0_1H+tmp3_2H=tmp10_11H
; -- Odd part
vpaddw %1, %4, %2 ; %1=in7_5+in3_1=z3_4
; (Original)
; z5 = (z3 + z4) * 1.175875602;
; z3 = z3 * -1.961570560; z4 = z4 * -0.390180644;
; z3 += z5; z4 += z5;
;
; (This implementation)
; z3 = z3 * (1.175875602 - 1.961570560) + z4 * 1.175875602;
; z4 = z3 * 1.175875602 + z4 * (1.175875602 - 0.390180644);
vperm2i128 %8, %1, %1, 0x01 ; %8=z4_3
vpunpcklwd %7, %1, %8 ; %7=z34_43L
vpunpckhwd %8, %1, %8 ; %8=z34_43H
vpmaddwd %7, %7, [GOTOFF(ebx,PW_MF078_F117_F078_F117)] ; %7=z3_4L
vpmaddwd %8, %8, [GOTOFF(ebx,PW_MF078_F117_F078_F117)] ; %8=z3_4H
; (Original)
; z1 = tmp0 + tmp3; z2 = tmp1 + tmp2;
; tmp0 = tmp0 * 0.298631336; tmp1 = tmp1 * 2.053119869;
; tmp2 = tmp2 * 3.072711026; tmp3 = tmp3 * 1.501321110;
; z1 = z1 * -0.899976223; z2 = z2 * -2.562915447;
; tmp0 += z1 + z3; tmp1 += z2 + z4;
; tmp2 += z2 + z3; tmp3 += z1 + z4;
;
; (This implementation)
; tmp0 = tmp0 * (0.298631336 - 0.899976223) + tmp3 * -0.899976223;
; tmp1 = tmp1 * (2.053119869 - 2.562915447) + tmp2 * -2.562915447;
; tmp2 = tmp1 * -2.562915447 + tmp2 * (3.072711026 - 2.562915447);
; tmp3 = tmp0 * -0.899976223 + tmp3 * (1.501321110 - 0.899976223);
; tmp0 += z3; tmp1 += z4;
; tmp2 += z3; tmp3 += z4;
vperm2i128 %2, %2, %2, 0x01 ; %2=in1_3
vpunpcklwd %3, %4, %2 ; %3=in71_53L
vpunpckhwd %4, %4, %2 ; %4=in71_53H
vpmaddwd %5, %3, [GOTOFF(ebx,PW_MF060_MF089_MF050_MF256)] ; %5=tmp0_1L
vpmaddwd %6, %4, [GOTOFF(ebx,PW_MF060_MF089_MF050_MF256)] ; %6=tmp0_1H
vpaddd %5, %5, %7 ; %5=tmp0_1L+z3_4L=tmp0_1L
vpaddd %6, %6, %8 ; %6=tmp0_1H+z3_4H=tmp0_1H
vpmaddwd %3, %3, [GOTOFF(ebx,PW_MF089_F060_MF256_F050)] ; %3=tmp3_2L
vpmaddwd %4, %4, [GOTOFF(ebx,PW_MF089_F060_MF256_F050)] ; %4=tmp3_2H
vperm2i128 %7, %7, %7, 0x01 ; %7=z4_3L
vperm2i128 %8, %8, %8, 0x01 ; %8=z4_3H
vpaddd %7, %3, %7 ; %7=tmp3_2L+z4_3L=tmp3_2L
vpaddd %8, %4, %8 ; %8=tmp3_2H+z4_3H=tmp3_2H
; -- Final output stage
vmovdqu %3, %9
vmovdqu %4, %10
vpaddd %1, %3, %7 ; %1=tmp10_11L+tmp3_2L=data0_1L
vpaddd %2, %4, %8 ; %2=tmp10_11H+tmp3_2H=data0_1H
vpaddd %1, %1, [GOTOFF(ebx,PD_DESCALE_P %+ %13)]
vpaddd %2, %2, [GOTOFF(ebx,PD_DESCALE_P %+ %13)]
vpsrad %1, %1, DESCALE_P %+ %13
vpsrad %2, %2, DESCALE_P %+ %13
vpackssdw %1, %1, %2 ; %1=data0_1
vpsubd %3, %3, %7 ; %3=tmp10_11L-tmp3_2L=data7_6L
vpsubd %4, %4, %8 ; %4=tmp10_11H-tmp3_2H=data7_6H
vpaddd %3, %3, [GOTOFF(ebx,PD_DESCALE_P %+ %13)]
vpaddd %4, %4, [GOTOFF(ebx,PD_DESCALE_P %+ %13)]
vpsrad %3, %3, DESCALE_P %+ %13
vpsrad %4, %4, DESCALE_P %+ %13
vpackssdw %4, %3, %4 ; %4=data7_6
vmovdqu %7, %11
vmovdqu %8, %12
vpaddd %2, %7, %5 ; %7=tmp13_12L+tmp0_1L=data3_2L
vpaddd %3, %8, %6 ; %8=tmp13_12H+tmp0_1H=data3_2H
vpaddd %2, %2, [GOTOFF(ebx,PD_DESCALE_P %+ %13)]
vpaddd %3, %3, [GOTOFF(ebx,PD_DESCALE_P %+ %13)]
vpsrad %2, %2, DESCALE_P %+ %13
vpsrad %3, %3, DESCALE_P %+ %13
vpackssdw %2, %2, %3 ; %2=data3_2
vpsubd %3, %7, %5 ; %7=tmp13_12L-tmp0_1L=data4_5L
vpsubd %6, %8, %6 ; %8=tmp13_12H-tmp0_1H=data4_5H
vpaddd %3, %3, [GOTOFF(ebx,PD_DESCALE_P %+ %13)]
vpaddd %6, %6, [GOTOFF(ebx,PD_DESCALE_P %+ %13)]
vpsrad %3, %3, DESCALE_P %+ %13
vpsrad %6, %6, DESCALE_P %+ %13
vpackssdw %3, %3, %6 ; %3=data4_5
%endmacro
; --------------------------------------------------------------------------
SECTION SEG_CONST
alignz 32
GLOBAL_DATA(jconst_idct_islow_avx2)
EXTN(jconst_idct_islow_avx2):
PW_F130_F054_MF130_F054 times 4 dw (F_0_541 + F_0_765), F_0_541
times 4 dw (F_0_541 - F_1_847), F_0_541
PW_MF078_F117_F078_F117 times 4 dw (F_1_175 - F_1_961), F_1_175
times 4 dw (F_1_175 - F_0_390), F_1_175
PW_MF060_MF089_MF050_MF256 times 4 dw (F_0_298 - F_0_899), -F_0_899
times 4 dw (F_2_053 - F_2_562), -F_2_562
PW_MF089_F060_MF256_F050 times 4 dw -F_0_899, (F_1_501 - F_0_899)
times 4 dw -F_2_562, (F_3_072 - F_2_562)
PD_DESCALE_P1 times 8 dd 1 << (DESCALE_P1 - 1)
PD_DESCALE_P2 times 8 dd 1 << (DESCALE_P2 - 1)
PB_CENTERJSAMP times 32 db CENTERJSAMPLE
PW_1_NEG1 times 8 dw 1
times 8 dw -1
alignz 32
; --------------------------------------------------------------------------
SECTION SEG_TEXT
BITS 32
;
; Perform dequantization and inverse DCT on one block of coefficients.
;
; GLOBAL(void)
; jsimd_idct_islow_avx2(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_YMMWORD
; ymmword wk[WK_NUM]
%define WK_NUM 4
align 32
GLOBAL_FUNCTION(jsimd_idct_islow_avx2)
EXTN(jsimd_idct_islow_avx2):
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.
; mov eax, [original_ebp]
mov edx, POINTER [dct_table(eax)] ; quantptr
mov esi, JCOEFPTR [coef_block(eax)] ; inptr
%ifndef NO_ZERO_COLUMN_TEST_ISLOW_AVX2
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)]
vpor xmm0, xmm0, XMMWORD [XMMBLOCK(3,0,esi,SIZEOF_JCOEF)]
vpor xmm1, xmm1, XMMWORD [XMMBLOCK(4,0,esi,SIZEOF_JCOEF)]
vpor xmm0, xmm0, XMMWORD [XMMBLOCK(5,0,esi,SIZEOF_JCOEF)]
vpor xmm1, xmm1, XMMWORD [XMMBLOCK(6,0,esi,SIZEOF_JCOEF)]
vpor xmm0, xmm0, XMMWORD [XMMBLOCK(7,0,esi,SIZEOF_JCOEF)]
vpor xmm1, xmm1, xmm0
vpacksswb xmm1, xmm1, xmm1
vpacksswb xmm1, xmm1, xmm1
movd eax, xmm1
test eax, eax
jnz short .columnDCT
; -- AC terms all zero
movdqa xmm5, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_JCOEF)]
vpmullw xmm5, xmm5, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
vpsllw xmm5, xmm5, PASS1_BITS
vpunpcklwd xmm4, xmm5, xmm5 ; xmm4=(00 00 01 01 02 02 03 03)
vpunpckhwd xmm5, xmm5, xmm5 ; xmm5=(04 04 05 05 06 06 07 07)
vinserti128 ymm4, ymm4, xmm5, 1
vpshufd ymm0, ymm4, 0x00 ; ymm0=col0_4=(00 00 00 00 00 00 00 00 04 04 04 04 04 04 04 04)
vpshufd ymm1, ymm4, 0x55 ; ymm1=col1_5=(01 01 01 01 01 01 01 01 05 05 05 05 05 05 05 05)
vpshufd ymm2, ymm4, 0xAA ; ymm2=col2_6=(02 02 02 02 02 02 02 02 06 06 06 06 06 06 06 06)
vpshufd ymm3, ymm4, 0xFF ; ymm3=col3_7=(03 03 03 03 03 03 03 03 07 07 07 07 07 07 07 07)
jmp near .column_end
alignx 16, 7
%endif
.columnDCT:
vmovdqu ymm4, YMMWORD [YMMBLOCK(0,0,esi,SIZEOF_JCOEF)] ; ymm4=in0_1
vmovdqu ymm5, YMMWORD [YMMBLOCK(2,0,esi,SIZEOF_JCOEF)] ; ymm5=in2_3
vmovdqu ymm6, YMMWORD [YMMBLOCK(4,0,esi,SIZEOF_JCOEF)] ; ymm6=in4_5
vmovdqu ymm7, YMMWORD [YMMBLOCK(6,0,esi,SIZEOF_JCOEF)] ; ymm7=in6_7
vpmullw ymm4, ymm4, YMMWORD [YMMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
vpmullw ymm5, ymm5, YMMWORD [YMMBLOCK(2,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
vpmullw ymm6, ymm6, YMMWORD [YMMBLOCK(4,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
vpmullw ymm7, ymm7, YMMWORD [YMMBLOCK(6,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
vperm2i128 ymm0, ymm4, ymm6, 0x20 ; ymm0=in0_4
vperm2i128 ymm1, ymm5, ymm4, 0x31 ; ymm1=in3_1
vperm2i128 ymm2, ymm5, ymm7, 0x20 ; ymm2=in2_6
vperm2i128 ymm3, ymm7, ymm6, 0x31 ; ymm3=in7_5
dodct ymm0, ymm1, ymm2, ymm3, ymm4, ymm5, ymm6, ymm7, XMMWORD [wk(0)], XMMWORD [wk(1)], XMMWORD [wk(2)], XMMWORD [wk(3)], 1
; ymm0=data0_1, ymm1=data3_2, ymm2=data4_5, ymm3=data7_6
dotranspose ymm0, ymm1, ymm2, ymm3, ymm4, ymm5, ymm6, ymm7
; ymm0=data0_4, ymm1=data1_5, ymm2=data2_6, ymm3=data3_7
.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.
mov eax, [original_ebp]
mov edi, JSAMPARRAY [output_buf(eax)] ; (JSAMPROW *)
mov eax, JDIMENSION [output_col(eax)]
vperm2i128 ymm4, ymm3, ymm1, 0x31 ; ymm3=in7_5
vperm2i128 ymm1, ymm3, ymm1, 0x20 ; ymm1=in3_1
dodct ymm0, ymm1, ymm2, ymm4, ymm3, ymm5, ymm6, ymm7, XMMWORD [wk(0)], XMMWORD [wk(1)], XMMWORD [wk(2)], XMMWORD [wk(3)], 2
; ymm0=data0_1, ymm1=data3_2, ymm2=data4_5, ymm4=data7_6
dotranspose ymm0, ymm1, ymm2, ymm4, ymm3, ymm5, ymm6, ymm7
; ymm0=data0_4, ymm1=data1_5, ymm2=data2_6, ymm4=data3_7
vpacksswb ymm0, ymm0, ymm1 ; ymm0=data01_45
vpacksswb ymm1, ymm2, ymm4 ; ymm1=data23_67
vpaddb ymm0, ymm0, [GOTOFF(ebx,PB_CENTERJSAMP)]
vpaddb ymm1, ymm1, [GOTOFF(ebx,PB_CENTERJSAMP)]
vextracti128 xmm6, ymm1, 1 ; xmm3=data67
vextracti128 xmm4, ymm0, 1 ; xmm2=data45
vextracti128 xmm2, ymm1, 0 ; xmm1=data23
vextracti128 xmm0, ymm0, 0 ; xmm0=data01
vpshufd xmm1, xmm0, 0x4E ; xmm1=(10 11 12 13 14 15 16 17 00 01 02 03 04 05 06 07)
vpshufd xmm3, xmm2, 0x4E ; xmm3=(30 31 32 33 34 35 36 37 20 21 22 23 24 25 26 27)
vpshufd xmm5, xmm4, 0x4E ; xmm5=(50 51 52 53 54 55 56 57 40 41 42 43 44 45 46 47)
vpshufd xmm7, xmm6, 0x4E ; xmm7=(70 71 72 73 74 75 76 77 60 61 62 63 64 65 66 67)
vzeroupper
mov edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW] ; (JSAMPLE *)
mov esi, JSAMPROW [edi+1*SIZEOF_JSAMPROW] ; (JSAMPLE *)
movq XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE], xmm0
movq XMM_MMWORD [esi+eax*SIZEOF_JSAMPLE], xmm1
mov edx, JSAMPROW [edi+2*SIZEOF_JSAMPROW] ; (JSAMPLE *)
mov esi, JSAMPROW [edi+3*SIZEOF_JSAMPROW] ; (JSAMPLE *)
movq XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE], xmm2
movq XMM_MMWORD [esi+eax*SIZEOF_JSAMPLE], xmm3
mov edx, JSAMPROW [edi+4*SIZEOF_JSAMPROW] ; (JSAMPLE *)
mov esi, JSAMPROW [edi+5*SIZEOF_JSAMPROW] ; (JSAMPLE *)
movq XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE], xmm4
movq XMM_MMWORD [esi+eax*SIZEOF_JSAMPLE], xmm5
mov edx, JSAMPROW [edi+6*SIZEOF_JSAMPROW] ; (JSAMPLE *)
mov esi, JSAMPROW [edi+7*SIZEOF_JSAMPROW] ; (JSAMPLE *)
movq XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE], xmm6
movq XMM_MMWORD [esi+eax*SIZEOF_JSAMPLE], xmm7
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
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