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mozjpeg/simd/i386/jidctfst-sse2.asm
DRC 19c791cdac Improve code formatting consistency 
With rare exceptions ...
- Always separate line continuation characters by one space from
  preceding code.
- Always use two-space indentation.  Never use tabs.
- Always use K&R-style conditional blocks.
- Always surround operators with spaces, except in raw assembly code.
- Always put a space after, but not before, a comma.
- Never put a space between type casts and variables/function calls.
- Never put a space between the function name and the argument list in
  function declarations and prototypes.
- Always surround braces ('{' and '}') with spaces.
- Always surround statements (if, for, else, catch, while, do, switch)
  with spaces.
- Always attach pointer symbols ('*' and '**') to the variable or
  function name.
- Always precede pointer symbols ('*' and '**') by a space in type
  casts.
- Use the MIN() macro from jpegint.h within the libjpeg and TurboJPEG
  API libraries (using min() from tjutil.h is still necessary for
  TJBench.)
- Where it makes sense (particularly in the TurboJPEG code), put a blank
  line after variable declaration blocks.
- Always separate statements in one-liners by two spaces.

The purpose of this was to ease maintenance on my part and also to make
it easier for contributors to figure out how to format patch
submissions.  This was admittedly confusing (even to me sometimes) when
we had 3 or 4 different style conventions in the same source tree.  The
new convention is more consistent with the formatting of other OSS code
bases.

This commit corrects deviations from the chosen formatting style in the
libjpeg API code and reformats the TurboJPEG API code such that it
conforms to the same standard.

NOTES:
- Although it is no longer necessary for the function name in function
  declarations to begin in Column 1 (this was historically necessary
  because of the ansi2knr utility, which allowed libjpeg to be built
  with non-ANSI compilers), we retain that formatting for the libjpeg
  code because it improves readability when using libjpeg's function
  attribute macros (GLOBAL(), etc.)
- This reformatting project was accomplished with the help of AStyle and
  Uncrustify, although neither was completely up to the task, and thus
  a great deal of manual tweaking was required.  Note to developers of
  code formatting utilities:  the libjpeg-turbo code base is an
  excellent test bed, because AFAICT, it breaks every single one of the
  utilities that are currently available.
- The legacy (MMX, SSE, 3DNow!) assembly code for i386 has been
  formatted to match the SSE2 code (refer to
  ff5685d5344273df321eb63a005eaae19d2496e3.)  I hadn't intended to
  bother with this, but the Loongson MMI implementation demonstrated
  that there is still academic value to the MMX implementation, as an
  algorithmic model for other 64-bit vector implementations.  Thus, it
  is desirable to improve its readability in the same manner as that of
  the SSE2 implementation.
2018-03-16 02:14:34 -05:00

504 lines
21 KiB
NASM
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;
; 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
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