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mozjpeg/simd/jfdctint-sse2-64.asm
DRC 123f7258a8 Format copyright headers more consistently 
The IJG convention is to format copyright notices as:

Copyright (C) YYYY, Owner.

We try to maintain this convention for any code that is part of the
libjpeg API library (with the exception of preserving the copyright
notices from Cendio's code verbatim, since those predate
libjpeg-turbo.)

Note that the phrase "All Rights Reserved" is no longer necessary, since
all Buenos Aires Convention signatories signed onto the Berne Convention
in 2000.  However, our convention is to retain this phrase for any files
that have a self-contained copyright header but to leave it off of any
files that refer to another file for conditions of distribution and use.
For instance, all of the non-SIMD files in the libjpeg API library refer
to README.ijg, and the copyright message in that file contains "All
Rights Reserved", so it is unnecessary to add it to the individual
files.

The TurboJPEG code retains my preferred formatting convention for
copyright notices, which is based on that of VirtualGL (where the
TurboJPEG API originated.)
2016-05-28 19:16:58 -05:00

622 lines
26 KiB
NASM
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;
; jfdctint.asm - accurate integer FDCT (64-bit SSE2)
;
; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
; Copyright (C) 2009, 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 slow-but-accurate integer implementation of the
; forward DCT (Discrete Cosine Transform). The following code is based
; directly on the IJG's original jfdctint.c; see the jfdctint.c for
; more details.
;
; [TAB8]
%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)
%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
; --------------------------------------------------------------------------
SECTION SEG_CONST
alignz 16
global EXTN(jconst_fdct_islow_sse2)
EXTN(jconst_fdct_islow_sse2):
PW_F130_F054 times 4 dw (F_0_541+F_0_765), F_0_541
PW_F054_MF130 times 4 dw F_0_541, (F_0_541-F_1_847)
PW_MF078_F117 times 4 dw (F_1_175-F_1_961), F_1_175
PW_F117_F078 times 4 dw F_1_175, (F_1_175-F_0_390)
PW_MF060_MF089 times 4 dw (F_0_298-F_0_899),-F_0_899
PW_MF089_F060 times 4 dw -F_0_899, (F_1_501-F_0_899)
PW_MF050_MF256 times 4 dw (F_2_053-F_2_562),-F_2_562
PW_MF256_F050 times 4 dw -F_2_562, (F_3_072-F_2_562)
PD_DESCALE_P1 times 4 dd 1 << (DESCALE_P1-1)
PD_DESCALE_P2 times 4 dd 1 << (DESCALE_P2-1)
PW_DESCALE_P2X times 8 dw 1 << (PASS1_BITS-1)
alignz 16
; --------------------------------------------------------------------------
SECTION SEG_TEXT
BITS 64
;
; Perform the forward DCT on one block of samples.
;
; GLOBAL(void)
; jsimd_fdct_islow_sse2 (DCTELEM *data)
;
; r10 = DCTELEM *data
%define wk(i) rbp-(WK_NUM-(i))*SIZEOF_XMMWORD ; xmmword wk[WK_NUM]
%define WK_NUM 6
align 16
global EXTN(jsimd_fdct_islow_sse2)
EXTN(jsimd_fdct_islow_sse2):
push rbp
mov rax,rsp ; rax = original rbp
sub rsp, byte 4
and rsp, byte (-SIZEOF_XMMWORD) ; align to 128 bits
mov [rsp],rax
mov rbp,rsp ; rbp = aligned rbp
lea rsp, [wk(0)]
collect_args
; ---- Pass 1: process rows.
mov rdx, r10 ; (DCTELEM *)
movdqa xmm0, XMMWORD [XMMBLOCK(0,0,rdx,SIZEOF_DCTELEM)]
movdqa xmm1, XMMWORD [XMMBLOCK(1,0,rdx,SIZEOF_DCTELEM)]
movdqa xmm2, XMMWORD [XMMBLOCK(2,0,rdx,SIZEOF_DCTELEM)]
movdqa xmm3, XMMWORD [XMMBLOCK(3,0,rdx,SIZEOF_DCTELEM)]
; xmm0=(00 01 02 03 04 05 06 07), xmm2=(20 21 22 23 24 25 26 27)
; xmm1=(10 11 12 13 14 15 16 17), xmm3=(30 31 32 33 34 35 36 37)
movdqa xmm4,xmm0 ; transpose coefficients(phase 1)
punpcklwd xmm0,xmm1 ; xmm0=(00 10 01 11 02 12 03 13)
punpckhwd xmm4,xmm1 ; xmm4=(04 14 05 15 06 16 07 17)
movdqa xmm5,xmm2 ; transpose coefficients(phase 1)
punpcklwd xmm2,xmm3 ; xmm2=(20 30 21 31 22 32 23 33)
punpckhwd xmm5,xmm3 ; xmm5=(24 34 25 35 26 36 27 37)
movdqa xmm6, XMMWORD [XMMBLOCK(4,0,rdx,SIZEOF_DCTELEM)]
movdqa xmm7, XMMWORD [XMMBLOCK(5,0,rdx,SIZEOF_DCTELEM)]
movdqa xmm1, XMMWORD [XMMBLOCK(6,0,rdx,SIZEOF_DCTELEM)]
movdqa xmm3, XMMWORD [XMMBLOCK(7,0,rdx,SIZEOF_DCTELEM)]
; xmm6=( 4 12 20 28 36 44 52 60), xmm1=( 6 14 22 30 38 46 54 62)
; xmm7=( 5 13 21 29 37 45 53 61), xmm3=( 7 15 23 31 39 47 55 63)
movdqa XMMWORD [wk(0)], xmm2 ; wk(0)=(20 30 21 31 22 32 23 33)
movdqa XMMWORD [wk(1)], xmm5 ; wk(1)=(24 34 25 35 26 36 27 37)
movdqa xmm2,xmm6 ; transpose coefficients(phase 1)
punpcklwd xmm6,xmm7 ; xmm6=(40 50 41 51 42 52 43 53)
punpckhwd xmm2,xmm7 ; xmm2=(44 54 45 55 46 56 47 57)
movdqa xmm5,xmm1 ; transpose coefficients(phase 1)
punpcklwd xmm1,xmm3 ; xmm1=(60 70 61 71 62 72 63 73)
punpckhwd xmm5,xmm3 ; xmm5=(64 74 65 75 66 76 67 77)
movdqa xmm7,xmm6 ; transpose coefficients(phase 2)
punpckldq xmm6,xmm1 ; xmm6=(40 50 60 70 41 51 61 71)
punpckhdq xmm7,xmm1 ; xmm7=(42 52 62 72 43 53 63 73)
movdqa xmm3,xmm2 ; transpose coefficients(phase 2)
punpckldq xmm2,xmm5 ; xmm2=(44 54 64 74 45 55 65 75)
punpckhdq xmm3,xmm5 ; xmm3=(46 56 66 76 47 57 67 77)
movdqa xmm1, XMMWORD [wk(0)] ; xmm1=(20 30 21 31 22 32 23 33)
movdqa xmm5, XMMWORD [wk(1)] ; xmm5=(24 34 25 35 26 36 27 37)
movdqa XMMWORD [wk(2)], xmm7 ; wk(2)=(42 52 62 72 43 53 63 73)
movdqa XMMWORD [wk(3)], xmm2 ; wk(3)=(44 54 64 74 45 55 65 75)
movdqa xmm7,xmm0 ; transpose coefficients(phase 2)
punpckldq xmm0,xmm1 ; xmm0=(00 10 20 30 01 11 21 31)
punpckhdq xmm7,xmm1 ; xmm7=(02 12 22 32 03 13 23 33)
movdqa xmm2,xmm4 ; transpose coefficients(phase 2)
punpckldq xmm4,xmm5 ; xmm4=(04 14 24 34 05 15 25 35)
punpckhdq xmm2,xmm5 ; xmm2=(06 16 26 36 07 17 27 37)
movdqa xmm1,xmm0 ; transpose coefficients(phase 3)
punpcklqdq xmm0,xmm6 ; xmm0=(00 10 20 30 40 50 60 70)=data0
punpckhqdq xmm1,xmm6 ; xmm1=(01 11 21 31 41 51 61 71)=data1
movdqa xmm5,xmm2 ; transpose coefficients(phase 3)
punpcklqdq xmm2,xmm3 ; xmm2=(06 16 26 36 46 56 66 76)=data6
punpckhqdq xmm5,xmm3 ; xmm5=(07 17 27 37 47 57 67 77)=data7
movdqa xmm6,xmm1
movdqa xmm3,xmm0
psubw xmm1,xmm2 ; xmm1=data1-data6=tmp6
psubw xmm0,xmm5 ; xmm0=data0-data7=tmp7
paddw xmm6,xmm2 ; xmm6=data1+data6=tmp1
paddw xmm3,xmm5 ; xmm3=data0+data7=tmp0
movdqa xmm2, XMMWORD [wk(2)] ; xmm2=(42 52 62 72 43 53 63 73)
movdqa xmm5, XMMWORD [wk(3)] ; xmm5=(44 54 64 74 45 55 65 75)
movdqa XMMWORD [wk(0)], xmm1 ; wk(0)=tmp6
movdqa XMMWORD [wk(1)], xmm0 ; wk(1)=tmp7
movdqa xmm1,xmm7 ; transpose coefficients(phase 3)
punpcklqdq xmm7,xmm2 ; xmm7=(02 12 22 32 42 52 62 72)=data2
punpckhqdq xmm1,xmm2 ; xmm1=(03 13 23 33 43 53 63 73)=data3
movdqa xmm0,xmm4 ; transpose coefficients(phase 3)
punpcklqdq xmm4,xmm5 ; xmm4=(04 14 24 34 44 54 64 74)=data4
punpckhqdq xmm0,xmm5 ; xmm0=(05 15 25 35 45 55 65 75)=data5
movdqa xmm2,xmm1
movdqa xmm5,xmm7
paddw xmm1,xmm4 ; xmm1=data3+data4=tmp3
paddw xmm7,xmm0 ; xmm7=data2+data5=tmp2
psubw xmm2,xmm4 ; xmm2=data3-data4=tmp4
psubw xmm5,xmm0 ; xmm5=data2-data5=tmp5
; -- Even part
movdqa xmm4,xmm3
movdqa xmm0,xmm6
paddw xmm3,xmm1 ; xmm3=tmp10
paddw xmm6,xmm7 ; xmm6=tmp11
psubw xmm4,xmm1 ; xmm4=tmp13
psubw xmm0,xmm7 ; xmm0=tmp12
movdqa xmm1,xmm3
paddw xmm3,xmm6 ; xmm3=tmp10+tmp11
psubw xmm1,xmm6 ; xmm1=tmp10-tmp11
psllw xmm3,PASS1_BITS ; xmm3=data0
psllw xmm1,PASS1_BITS ; xmm1=data4
movdqa XMMWORD [wk(2)], xmm3 ; wk(2)=data0
movdqa XMMWORD [wk(3)], xmm1 ; wk(3)=data4
; (Original)
; z1 = (tmp12 + tmp13) * 0.541196100;
; data2 = z1 + tmp13 * 0.765366865;
; data6 = z1 + tmp12 * -1.847759065;
;
; (This implementation)
; data2 = tmp13 * (0.541196100 + 0.765366865) + tmp12 * 0.541196100;
; data6 = tmp13 * 0.541196100 + tmp12 * (0.541196100 - 1.847759065);
movdqa xmm7,xmm4 ; xmm4=tmp13
movdqa xmm6,xmm4
punpcklwd xmm7,xmm0 ; xmm0=tmp12
punpckhwd xmm6,xmm0
movdqa xmm4,xmm7
movdqa xmm0,xmm6
pmaddwd xmm7,[rel PW_F130_F054] ; xmm7=data2L
pmaddwd xmm6,[rel PW_F130_F054] ; xmm6=data2H
pmaddwd xmm4,[rel PW_F054_MF130] ; xmm4=data6L
pmaddwd xmm0,[rel PW_F054_MF130] ; xmm0=data6H
paddd xmm7,[rel PD_DESCALE_P1]
paddd xmm6,[rel PD_DESCALE_P1]
psrad xmm7,DESCALE_P1
psrad xmm6,DESCALE_P1
paddd xmm4,[rel PD_DESCALE_P1]
paddd xmm0,[rel PD_DESCALE_P1]
psrad xmm4,DESCALE_P1
psrad xmm0,DESCALE_P1
packssdw xmm7,xmm6 ; xmm7=data2
packssdw xmm4,xmm0 ; xmm4=data6
movdqa XMMWORD [wk(4)], xmm7 ; wk(4)=data2
movdqa XMMWORD [wk(5)], xmm4 ; wk(5)=data6
; -- Odd part
movdqa xmm3, XMMWORD [wk(0)] ; xmm3=tmp6
movdqa xmm1, XMMWORD [wk(1)] ; xmm1=tmp7
movdqa xmm6,xmm2 ; xmm2=tmp4
movdqa xmm0,xmm5 ; xmm5=tmp5
paddw xmm6,xmm3 ; xmm6=z3
paddw xmm0,xmm1 ; xmm0=z4
; (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);
movdqa xmm7,xmm6
movdqa xmm4,xmm6
punpcklwd xmm7,xmm0
punpckhwd xmm4,xmm0
movdqa xmm6,xmm7
movdqa xmm0,xmm4
pmaddwd xmm7,[rel PW_MF078_F117] ; xmm7=z3L
pmaddwd xmm4,[rel PW_MF078_F117] ; xmm4=z3H
pmaddwd xmm6,[rel PW_F117_F078] ; xmm6=z4L
pmaddwd xmm0,[rel PW_F117_F078] ; xmm0=z4H
movdqa XMMWORD [wk(0)], xmm7 ; wk(0)=z3L
movdqa XMMWORD [wk(1)], xmm4 ; wk(1)=z3H
; (Original)
; z1 = tmp4 + tmp7; z2 = tmp5 + tmp6;
; tmp4 = tmp4 * 0.298631336; tmp5 = tmp5 * 2.053119869;
; tmp6 = tmp6 * 3.072711026; tmp7 = tmp7 * 1.501321110;
; z1 = z1 * -0.899976223; z2 = z2 * -2.562915447;
; data7 = tmp4 + z1 + z3; data5 = tmp5 + z2 + z4;
; data3 = tmp6 + z2 + z3; data1 = tmp7 + z1 + z4;
;
; (This implementation)
; tmp4 = tmp4 * (0.298631336 - 0.899976223) + tmp7 * -0.899976223;
; tmp5 = tmp5 * (2.053119869 - 2.562915447) + tmp6 * -2.562915447;
; tmp6 = tmp5 * -2.562915447 + tmp6 * (3.072711026 - 2.562915447);
; tmp7 = tmp4 * -0.899976223 + tmp7 * (1.501321110 - 0.899976223);
; data7 = tmp4 + z3; data5 = tmp5 + z4;
; data3 = tmp6 + z3; data1 = tmp7 + z4;
movdqa xmm7,xmm2
movdqa xmm4,xmm2
punpcklwd xmm7,xmm1
punpckhwd xmm4,xmm1
movdqa xmm2,xmm7
movdqa xmm1,xmm4
pmaddwd xmm7,[rel PW_MF060_MF089] ; xmm7=tmp4L
pmaddwd xmm4,[rel PW_MF060_MF089] ; xmm4=tmp4H
pmaddwd xmm2,[rel PW_MF089_F060] ; xmm2=tmp7L
pmaddwd xmm1,[rel PW_MF089_F060] ; xmm1=tmp7H
paddd xmm7, XMMWORD [wk(0)] ; xmm7=data7L
paddd xmm4, XMMWORD [wk(1)] ; xmm4=data7H
paddd xmm2,xmm6 ; xmm2=data1L
paddd xmm1,xmm0 ; xmm1=data1H
paddd xmm7,[rel PD_DESCALE_P1]
paddd xmm4,[rel PD_DESCALE_P1]
psrad xmm7,DESCALE_P1
psrad xmm4,DESCALE_P1
paddd xmm2,[rel PD_DESCALE_P1]
paddd xmm1,[rel PD_DESCALE_P1]
psrad xmm2,DESCALE_P1
psrad xmm1,DESCALE_P1
packssdw xmm7,xmm4 ; xmm7=data7
packssdw xmm2,xmm1 ; xmm2=data1
movdqa xmm4,xmm5
movdqa xmm1,xmm5
punpcklwd xmm4,xmm3
punpckhwd xmm1,xmm3
movdqa xmm5,xmm4
movdqa xmm3,xmm1
pmaddwd xmm4,[rel PW_MF050_MF256] ; xmm4=tmp5L
pmaddwd xmm1,[rel PW_MF050_MF256] ; xmm1=tmp5H
pmaddwd xmm5,[rel PW_MF256_F050] ; xmm5=tmp6L
pmaddwd xmm3,[rel PW_MF256_F050] ; xmm3=tmp6H
paddd xmm4,xmm6 ; xmm4=data5L
paddd xmm1,xmm0 ; xmm1=data5H
paddd xmm5, XMMWORD [wk(0)] ; xmm5=data3L
paddd xmm3, XMMWORD [wk(1)] ; xmm3=data3H
paddd xmm4,[rel PD_DESCALE_P1]
paddd xmm1,[rel PD_DESCALE_P1]
psrad xmm4,DESCALE_P1
psrad xmm1,DESCALE_P1
paddd xmm5,[rel PD_DESCALE_P1]
paddd xmm3,[rel PD_DESCALE_P1]
psrad xmm5,DESCALE_P1
psrad xmm3,DESCALE_P1
packssdw xmm4,xmm1 ; xmm4=data5
packssdw xmm5,xmm3 ; xmm5=data3
; ---- Pass 2: process columns.
movdqa xmm6, XMMWORD [wk(2)] ; xmm6=col0
movdqa xmm0, XMMWORD [wk(4)] ; xmm0=col2
; xmm6=(00 10 20 30 40 50 60 70), xmm0=(02 12 22 32 42 52 62 72)
; xmm2=(01 11 21 31 41 51 61 71), xmm5=(03 13 23 33 43 53 63 73)
movdqa xmm1,xmm6 ; transpose coefficients(phase 1)
punpcklwd xmm6,xmm2 ; xmm6=(00 01 10 11 20 21 30 31)
punpckhwd xmm1,xmm2 ; xmm1=(40 41 50 51 60 61 70 71)
movdqa xmm3,xmm0 ; transpose coefficients(phase 1)
punpcklwd xmm0,xmm5 ; xmm0=(02 03 12 13 22 23 32 33)
punpckhwd xmm3,xmm5 ; xmm3=(42 43 52 53 62 63 72 73)
movdqa xmm2, XMMWORD [wk(3)] ; xmm2=col4
movdqa xmm5, XMMWORD [wk(5)] ; xmm5=col6
; xmm2=(04 14 24 34 44 54 64 74), xmm5=(06 16 26 36 46 56 66 76)
; xmm4=(05 15 25 35 45 55 65 75), xmm7=(07 17 27 37 47 57 67 77)
movdqa XMMWORD [wk(0)], xmm0 ; wk(0)=(02 03 12 13 22 23 32 33)
movdqa XMMWORD [wk(1)], xmm3 ; wk(1)=(42 43 52 53 62 63 72 73)
movdqa xmm0,xmm2 ; transpose coefficients(phase 1)
punpcklwd xmm2,xmm4 ; xmm2=(04 05 14 15 24 25 34 35)
punpckhwd xmm0,xmm4 ; xmm0=(44 45 54 55 64 65 74 75)
movdqa xmm3,xmm5 ; transpose coefficients(phase 1)
punpcklwd xmm5,xmm7 ; xmm5=(06 07 16 17 26 27 36 37)
punpckhwd xmm3,xmm7 ; xmm3=(46 47 56 57 66 67 76 77)
movdqa xmm4,xmm2 ; transpose coefficients(phase 2)
punpckldq xmm2,xmm5 ; xmm2=(04 05 06 07 14 15 16 17)
punpckhdq xmm4,xmm5 ; xmm4=(24 25 26 27 34 35 36 37)
movdqa xmm7,xmm0 ; transpose coefficients(phase 2)
punpckldq xmm0,xmm3 ; xmm0=(44 45 46 47 54 55 56 57)
punpckhdq xmm7,xmm3 ; xmm7=(64 65 66 67 74 75 76 77)
movdqa xmm5, XMMWORD [wk(0)] ; xmm5=(02 03 12 13 22 23 32 33)
movdqa xmm3, XMMWORD [wk(1)] ; xmm3=(42 43 52 53 62 63 72 73)
movdqa XMMWORD [wk(2)], xmm4 ; wk(2)=(24 25 26 27 34 35 36 37)
movdqa XMMWORD [wk(3)], xmm0 ; wk(3)=(44 45 46 47 54 55 56 57)
movdqa xmm4,xmm6 ; transpose coefficients(phase 2)
punpckldq xmm6,xmm5 ; xmm6=(00 01 02 03 10 11 12 13)
punpckhdq xmm4,xmm5 ; xmm4=(20 21 22 23 30 31 32 33)
movdqa xmm0,xmm1 ; transpose coefficients(phase 2)
punpckldq xmm1,xmm3 ; xmm1=(40 41 42 43 50 51 52 53)
punpckhdq xmm0,xmm3 ; xmm0=(60 61 62 63 70 71 72 73)
movdqa xmm5,xmm6 ; transpose coefficients(phase 3)
punpcklqdq xmm6,xmm2 ; xmm6=(00 01 02 03 04 05 06 07)=data0
punpckhqdq xmm5,xmm2 ; xmm5=(10 11 12 13 14 15 16 17)=data1
movdqa xmm3,xmm0 ; transpose coefficients(phase 3)
punpcklqdq xmm0,xmm7 ; xmm0=(60 61 62 63 64 65 66 67)=data6
punpckhqdq xmm3,xmm7 ; xmm3=(70 71 72 73 74 75 76 77)=data7
movdqa xmm2,xmm5
movdqa xmm7,xmm6
psubw xmm5,xmm0 ; xmm5=data1-data6=tmp6
psubw xmm6,xmm3 ; xmm6=data0-data7=tmp7
paddw xmm2,xmm0 ; xmm2=data1+data6=tmp1
paddw xmm7,xmm3 ; xmm7=data0+data7=tmp0
movdqa xmm0, XMMWORD [wk(2)] ; xmm0=(24 25 26 27 34 35 36 37)
movdqa xmm3, XMMWORD [wk(3)] ; xmm3=(44 45 46 47 54 55 56 57)
movdqa XMMWORD [wk(0)], xmm5 ; wk(0)=tmp6
movdqa XMMWORD [wk(1)], xmm6 ; wk(1)=tmp7
movdqa xmm5,xmm4 ; transpose coefficients(phase 3)
punpcklqdq xmm4,xmm0 ; xmm4=(20 21 22 23 24 25 26 27)=data2
punpckhqdq xmm5,xmm0 ; xmm5=(30 31 32 33 34 35 36 37)=data3
movdqa xmm6,xmm1 ; transpose coefficients(phase 3)
punpcklqdq xmm1,xmm3 ; xmm1=(40 41 42 43 44 45 46 47)=data4
punpckhqdq xmm6,xmm3 ; xmm6=(50 51 52 53 54 55 56 57)=data5
movdqa xmm0,xmm5
movdqa xmm3,xmm4
paddw xmm5,xmm1 ; xmm5=data3+data4=tmp3
paddw xmm4,xmm6 ; xmm4=data2+data5=tmp2
psubw xmm0,xmm1 ; xmm0=data3-data4=tmp4
psubw xmm3,xmm6 ; xmm3=data2-data5=tmp5
; -- Even part
movdqa xmm1,xmm7
movdqa xmm6,xmm2
paddw xmm7,xmm5 ; xmm7=tmp10
paddw xmm2,xmm4 ; xmm2=tmp11
psubw xmm1,xmm5 ; xmm1=tmp13
psubw xmm6,xmm4 ; xmm6=tmp12
movdqa xmm5,xmm7
paddw xmm7,xmm2 ; xmm7=tmp10+tmp11
psubw xmm5,xmm2 ; xmm5=tmp10-tmp11
paddw xmm7,[rel PW_DESCALE_P2X]
paddw xmm5,[rel PW_DESCALE_P2X]
psraw xmm7,PASS1_BITS ; xmm7=data0
psraw xmm5,PASS1_BITS ; xmm5=data4
movdqa XMMWORD [XMMBLOCK(0,0,rdx,SIZEOF_DCTELEM)], xmm7
movdqa XMMWORD [XMMBLOCK(4,0,rdx,SIZEOF_DCTELEM)], xmm5
; (Original)
; z1 = (tmp12 + tmp13) * 0.541196100;
; data2 = z1 + tmp13 * 0.765366865;
; data6 = z1 + tmp12 * -1.847759065;
;
; (This implementation)
; data2 = tmp13 * (0.541196100 + 0.765366865) + tmp12 * 0.541196100;
; data6 = tmp13 * 0.541196100 + tmp12 * (0.541196100 - 1.847759065);
movdqa xmm4,xmm1 ; xmm1=tmp13
movdqa xmm2,xmm1
punpcklwd xmm4,xmm6 ; xmm6=tmp12
punpckhwd xmm2,xmm6
movdqa xmm1,xmm4
movdqa xmm6,xmm2
pmaddwd xmm4,[rel PW_F130_F054] ; xmm4=data2L
pmaddwd xmm2,[rel PW_F130_F054] ; xmm2=data2H
pmaddwd xmm1,[rel PW_F054_MF130] ; xmm1=data6L
pmaddwd xmm6,[rel PW_F054_MF130] ; xmm6=data6H
paddd xmm4,[rel PD_DESCALE_P2]
paddd xmm2,[rel PD_DESCALE_P2]
psrad xmm4,DESCALE_P2
psrad xmm2,DESCALE_P2
paddd xmm1,[rel PD_DESCALE_P2]
paddd xmm6,[rel PD_DESCALE_P2]
psrad xmm1,DESCALE_P2
psrad xmm6,DESCALE_P2
packssdw xmm4,xmm2 ; xmm4=data2
packssdw xmm1,xmm6 ; xmm1=data6
movdqa XMMWORD [XMMBLOCK(2,0,rdx,SIZEOF_DCTELEM)], xmm4
movdqa XMMWORD [XMMBLOCK(6,0,rdx,SIZEOF_DCTELEM)], xmm1
; -- Odd part
movdqa xmm7, XMMWORD [wk(0)] ; xmm7=tmp6
movdqa xmm5, XMMWORD [wk(1)] ; xmm5=tmp7
movdqa xmm2,xmm0 ; xmm0=tmp4
movdqa xmm6,xmm3 ; xmm3=tmp5
paddw xmm2,xmm7 ; xmm2=z3
paddw xmm6,xmm5 ; xmm6=z4
; (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);
movdqa xmm4,xmm2
movdqa xmm1,xmm2
punpcklwd xmm4,xmm6
punpckhwd xmm1,xmm6
movdqa xmm2,xmm4
movdqa xmm6,xmm1
pmaddwd xmm4,[rel PW_MF078_F117] ; xmm4=z3L
pmaddwd xmm1,[rel PW_MF078_F117] ; xmm1=z3H
pmaddwd xmm2,[rel PW_F117_F078] ; xmm2=z4L
pmaddwd xmm6,[rel PW_F117_F078] ; xmm6=z4H
movdqa XMMWORD [wk(0)], xmm4 ; wk(0)=z3L
movdqa XMMWORD [wk(1)], xmm1 ; wk(1)=z3H
; (Original)
; z1 = tmp4 + tmp7; z2 = tmp5 + tmp6;
; tmp4 = tmp4 * 0.298631336; tmp5 = tmp5 * 2.053119869;
; tmp6 = tmp6 * 3.072711026; tmp7 = tmp7 * 1.501321110;
; z1 = z1 * -0.899976223; z2 = z2 * -2.562915447;
; data7 = tmp4 + z1 + z3; data5 = tmp5 + z2 + z4;
; data3 = tmp6 + z2 + z3; data1 = tmp7 + z1 + z4;
;
; (This implementation)
; tmp4 = tmp4 * (0.298631336 - 0.899976223) + tmp7 * -0.899976223;
; tmp5 = tmp5 * (2.053119869 - 2.562915447) + tmp6 * -2.562915447;
; tmp6 = tmp5 * -2.562915447 + tmp6 * (3.072711026 - 2.562915447);
; tmp7 = tmp4 * -0.899976223 + tmp7 * (1.501321110 - 0.899976223);
; data7 = tmp4 + z3; data5 = tmp5 + z4;
; data3 = tmp6 + z3; data1 = tmp7 + z4;
movdqa xmm4,xmm0
movdqa xmm1,xmm0
punpcklwd xmm4,xmm5
punpckhwd xmm1,xmm5
movdqa xmm0,xmm4
movdqa xmm5,xmm1
pmaddwd xmm4,[rel PW_MF060_MF089] ; xmm4=tmp4L
pmaddwd xmm1,[rel PW_MF060_MF089] ; xmm1=tmp4H
pmaddwd xmm0,[rel PW_MF089_F060] ; xmm0=tmp7L
pmaddwd xmm5,[rel PW_MF089_F060] ; xmm5=tmp7H
paddd xmm4, XMMWORD [wk(0)] ; xmm4=data7L
paddd xmm1, XMMWORD [wk(1)] ; xmm1=data7H
paddd xmm0,xmm2 ; xmm0=data1L
paddd xmm5,xmm6 ; xmm5=data1H
paddd xmm4,[rel PD_DESCALE_P2]
paddd xmm1,[rel PD_DESCALE_P2]
psrad xmm4,DESCALE_P2
psrad xmm1,DESCALE_P2
paddd xmm0,[rel PD_DESCALE_P2]
paddd xmm5,[rel PD_DESCALE_P2]
psrad xmm0,DESCALE_P2
psrad xmm5,DESCALE_P2
packssdw xmm4,xmm1 ; xmm4=data7
packssdw xmm0,xmm5 ; xmm0=data1
movdqa XMMWORD [XMMBLOCK(7,0,rdx,SIZEOF_DCTELEM)], xmm4
movdqa XMMWORD [XMMBLOCK(1,0,rdx,SIZEOF_DCTELEM)], xmm0
movdqa xmm1,xmm3
movdqa xmm5,xmm3
punpcklwd xmm1,xmm7
punpckhwd xmm5,xmm7
movdqa xmm3,xmm1
movdqa xmm7,xmm5
pmaddwd xmm1,[rel PW_MF050_MF256] ; xmm1=tmp5L
pmaddwd xmm5,[rel PW_MF050_MF256] ; xmm5=tmp5H
pmaddwd xmm3,[rel PW_MF256_F050] ; xmm3=tmp6L
pmaddwd xmm7,[rel PW_MF256_F050] ; xmm7=tmp6H
paddd xmm1,xmm2 ; xmm1=data5L
paddd xmm5,xmm6 ; xmm5=data5H
paddd xmm3, XMMWORD [wk(0)] ; xmm3=data3L
paddd xmm7, XMMWORD [wk(1)] ; xmm7=data3H
paddd xmm1,[rel PD_DESCALE_P2]
paddd xmm5,[rel PD_DESCALE_P2]
psrad xmm1,DESCALE_P2
psrad xmm5,DESCALE_P2
paddd xmm3,[rel PD_DESCALE_P2]
paddd xmm7,[rel PD_DESCALE_P2]
psrad xmm3,DESCALE_P2
psrad xmm7,DESCALE_P2
packssdw xmm1,xmm5 ; xmm1=data5
packssdw xmm3,xmm7 ; xmm3=data3
movdqa XMMWORD [XMMBLOCK(5,0,rdx,SIZEOF_DCTELEM)], xmm1
movdqa XMMWORD [XMMBLOCK(3,0,rdx,SIZEOF_DCTELEM)], xmm3
uncollect_args
mov rsp,rbp ; rsp <- aligned rbp
pop rsp ; rsp <- original rbp
pop rbp
ret
; For some reason, the OS X linker does not honor the request to align the
; segment unless we do this.
align 16
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