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;
; jidctint.asm - accurate integer IDCT (64-bit SSE2)
;
; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
; Copyright (C) 2009, 2016, 2020, 2024, D. R. Commander.
; Copyright (C) 2018, Matthias Räncker.
; Copyright (C) 2023, Aliaksiej Kandracienka.
;
; 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) or Yasm.
;
; 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
; --------------------------------------------------------------------------
SECTION SEG_CONST
ALIGNZ 32
GLOBAL_DATA(jconst_idct_islow_sse2)
EXTN(jconst_idct_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)
PB_CENTERJSAMP times 16 db CENTERJSAMPLE
ALIGNZ 32
; --------------------------------------------------------------------------
SECTION SEG_TEXT
BITS 64
;
; Perform dequantization and inverse DCT on one block of coefficients.
;
; GLOBAL(void)
; jsimd_idct_islow_sse2(void *dct_table, JCOEFPTR coef_block,
; JSAMPARRAY output_buf, JDIMENSION output_col)
;
; r10 = jpeg_component_info *compptr
; r11 = JCOEFPTR coef_block
; r12 = JSAMPARRAY output_buf
; r13d = JDIMENSION output_col
%define wk(i) r15 - (WK_NUM - (i)) * SIZEOF_XMMWORD
; xmmword wk[WK_NUM]
%define WK_NUM 12
align 32
GLOBAL_FUNCTION(jsimd_idct_islow_sse2)
EXTN(jsimd_idct_islow_sse2):
ENDBR64
push rbp
mov rbp, rsp
push r15
and rsp, byte (-SIZEOF_XMMWORD) ; align to 128 bits
; Allocate stack space for wk array. r15 is used to access it.
mov r15, rsp
sub rsp, (SIZEOF_XMMWORD * WK_NUM)
COLLECT_ARGS 4
; ---- Pass 1: process columns from input.
mov rdx, r10 ; quantptr
mov rsi, r11 ; inptr
%ifndef NO_ZERO_COLUMN_TEST_ISLOW_SSE2
mov eax, dword [DWBLOCK(1,0,rsi,SIZEOF_JCOEF)]
or eax, dword [DWBLOCK(2,0,rsi,SIZEOF_JCOEF)]
jnz near .columnDCT
movdqa xmm0, XMMWORD [XMMBLOCK(1,0,rsi,SIZEOF_JCOEF)]
movdqa xmm1, XMMWORD [XMMBLOCK(2,0,rsi,SIZEOF_JCOEF)]
por xmm0, XMMWORD [XMMBLOCK(3,0,rsi,SIZEOF_JCOEF)]
por xmm1, XMMWORD [XMMBLOCK(4,0,rsi,SIZEOF_JCOEF)]
por xmm0, XMMWORD [XMMBLOCK(5,0,rsi,SIZEOF_JCOEF)]
por xmm1, XMMWORD [XMMBLOCK(6,0,rsi,SIZEOF_JCOEF)]
por xmm0, XMMWORD [XMMBLOCK(7,0,rsi,SIZEOF_JCOEF)]
por xmm1, xmm0
packsswb xmm1, xmm1
packsswb xmm1, xmm1
movd eax, xmm1
test rax, rax
jnz short .columnDCT
; -- AC terms all zero
movdqa xmm5, XMMWORD [XMMBLOCK(0,0,rsi,SIZEOF_JCOEF)]
pmullw xmm5, XMMWORD [XMMBLOCK(0,0,rdx,SIZEOF_ISLOW_MULT_TYPE)]
psllw xmm5, PASS1_BITS
movdqa xmm4, xmm5 ; xmm5=in0=(00 01 02 03 04 05 06 07)
punpcklwd xmm5, xmm5 ; xmm5=(00 00 01 01 02 02 03 03)
punpckhwd xmm4, xmm4 ; xmm4=(04 04 05 05 06 06 07 07)
pshufd xmm7, xmm5, 0x00 ; xmm7=col0=(00 00 00 00 00 00 00 00)
pshufd xmm6, xmm5, 0x55 ; xmm6=col1=(01 01 01 01 01 01 01 01)
pshufd xmm1, xmm5, 0xAA ; xmm1=col2=(02 02 02 02 02 02 02 02)
pshufd xmm5, xmm5, 0xFF ; xmm5=col3=(03 03 03 03 03 03 03 03)
pshufd xmm0, xmm4, 0x00 ; xmm0=col4=(04 04 04 04 04 04 04 04)
pshufd xmm3, xmm4, 0x55 ; xmm3=col5=(05 05 05 05 05 05 05 05)
pshufd xmm2, xmm4, 0xAA ; xmm2=col6=(06 06 06 06 06 06 06 06)
pshufd xmm4, xmm4, 0xFF ; xmm4=col7=(07 07 07 07 07 07 07 07)
movdqa XMMWORD [wk(8)], xmm6 ; wk(8)=col1
movdqa XMMWORD [wk(9)], xmm5 ; wk(9)=col3
movdqa XMMWORD [wk(10)], xmm3 ; wk(10)=col5
movdqa XMMWORD [wk(11)], xmm4 ; wk(11)=col7
jmp near .column_end
%endif
.columnDCT:
; -- Even part
movdqa xmm0, XMMWORD [XMMBLOCK(0,0,rsi,SIZEOF_JCOEF)]
movdqa xmm1, XMMWORD [XMMBLOCK(2,0,rsi,SIZEOF_JCOEF)]
pmullw xmm0, XMMWORD [XMMBLOCK(0,0,rdx,SIZEOF_ISLOW_MULT_TYPE)]
pmullw xmm1, XMMWORD [XMMBLOCK(2,0,rdx,SIZEOF_ISLOW_MULT_TYPE)]
movdqa xmm2, XMMWORD [XMMBLOCK(4,0,rsi,SIZEOF_JCOEF)]
movdqa xmm3, XMMWORD [XMMBLOCK(6,0,rsi,SIZEOF_JCOEF)]
pmullw xmm2, XMMWORD [XMMBLOCK(4,0,rdx,SIZEOF_ISLOW_MULT_TYPE)]
pmullw xmm3, XMMWORD [XMMBLOCK(6,0,rdx,SIZEOF_ISLOW_MULT_TYPE)]
; (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;
movdqa xmm4, xmm1 ; xmm1=in2=z2
movdqa xmm5, xmm1
punpcklwd xmm4, xmm3 ; xmm3=in6=z3
punpckhwd xmm5, xmm3
movdqa xmm1, xmm4
movdqa xmm3, xmm5
pmaddwd xmm4, [rel PW_F130_F054] ; xmm4=tmp3L
pmaddwd xmm5, [rel PW_F130_F054] ; xmm5=tmp3H
pmaddwd xmm1, [rel PW_F054_MF130] ; xmm1=tmp2L
pmaddwd xmm3, [rel PW_F054_MF130] ; xmm3=tmp2H
movdqa xmm6, xmm0
paddw xmm0, xmm2 ; xmm0=in0+in4
psubw xmm6, xmm2 ; xmm6=in0-in4
pxor xmm7, xmm7
pxor xmm2, xmm2
punpcklwd xmm7, xmm0 ; xmm7=tmp0L
punpckhwd xmm2, xmm0 ; xmm2=tmp0H
psrad xmm7, (16-CONST_BITS) ; psrad xmm7,16 & pslld xmm7,CONST_BITS
psrad xmm2, (16-CONST_BITS) ; psrad xmm2,16 & pslld xmm2,CONST_BITS
movdqa xmm0, xmm7
paddd xmm7, xmm4 ; xmm7=tmp10L
psubd xmm0, xmm4 ; xmm0=tmp13L
movdqa xmm4, xmm2
paddd xmm2, xmm5 ; xmm2=tmp10H
psubd xmm4, xmm5 ; xmm4=tmp13H
movdqa XMMWORD [wk(0)], xmm7 ; wk(0)=tmp10L
movdqa XMMWORD [wk(1)], xmm2 ; wk(1)=tmp10H
movdqa XMMWORD [wk(2)], xmm0 ; wk(2)=tmp13L
movdqa XMMWORD [wk(3)], xmm4 ; wk(3)=tmp13H
pxor xmm5, xmm5
pxor xmm7, xmm7
punpcklwd xmm5, xmm6 ; xmm5=tmp1L
punpckhwd xmm7, xmm6 ; xmm7=tmp1H
psrad xmm5, (16-CONST_BITS) ; psrad xmm5,16 & pslld xmm5,CONST_BITS
psrad xmm7, (16-CONST_BITS) ; psrad xmm7,16 & pslld xmm7,CONST_BITS
movdqa xmm2, xmm5
paddd xmm5, xmm1 ; xmm5=tmp11L
psubd xmm2, xmm1 ; xmm2=tmp12L
movdqa xmm0, xmm7
paddd xmm7, xmm3 ; xmm7=tmp11H
psubd xmm0, xmm3 ; xmm0=tmp12H
movdqa XMMWORD [wk(4)], xmm5 ; wk(4)=tmp11L
movdqa XMMWORD [wk(5)], xmm7 ; wk(5)=tmp11H
movdqa XMMWORD [wk(6)], xmm2 ; wk(6)=tmp12L
movdqa XMMWORD [wk(7)], xmm0 ; wk(7)=tmp12H
; -- Odd part
movdqa xmm4, XMMWORD [XMMBLOCK(1,0,rsi,SIZEOF_JCOEF)]
movdqa xmm6, XMMWORD [XMMBLOCK(3,0,rsi,SIZEOF_JCOEF)]
pmullw xmm4, XMMWORD [XMMBLOCK(1,0,rdx,SIZEOF_ISLOW_MULT_TYPE)]
pmullw xmm6, XMMWORD [XMMBLOCK(3,0,rdx,SIZEOF_ISLOW_MULT_TYPE)]
movdqa xmm1, XMMWORD [XMMBLOCK(5,0,rsi,SIZEOF_JCOEF)]
movdqa xmm3, XMMWORD [XMMBLOCK(7,0,rsi,SIZEOF_JCOEF)]
pmullw xmm1, XMMWORD [XMMBLOCK(5,0,rdx,SIZEOF_ISLOW_MULT_TYPE)]
pmullw xmm3, XMMWORD [XMMBLOCK(7,0,rdx,SIZEOF_ISLOW_MULT_TYPE)]
movdqa xmm5, xmm6
movdqa xmm7, xmm4
paddw xmm5, xmm3 ; xmm5=z3
paddw xmm7, xmm1 ; xmm7=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 xmm2, xmm5
movdqa xmm0, xmm5
punpcklwd xmm2, xmm7
punpckhwd xmm0, xmm7
movdqa xmm5, xmm2
movdqa xmm7, xmm0
pmaddwd xmm2, [rel PW_MF078_F117] ; xmm2=z3L
pmaddwd xmm0, [rel PW_MF078_F117] ; xmm0=z3H
pmaddwd xmm5, [rel PW_F117_F078] ; xmm5=z4L
pmaddwd xmm7, [rel PW_F117_F078] ; xmm7=z4H
movdqa XMMWORD [wk(10)], xmm2 ; wk(10)=z3L
movdqa XMMWORD [wk(11)], xmm0 ; wk(11)=z3H
; (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;
movdqa xmm2, xmm3
movdqa xmm0, xmm3
punpcklwd xmm2, xmm4
punpckhwd xmm0, xmm4
movdqa xmm3, xmm2
movdqa xmm4, xmm0
pmaddwd xmm2, [rel PW_MF060_MF089] ; xmm2=tmp0L
pmaddwd xmm0, [rel PW_MF060_MF089] ; xmm0=tmp0H
pmaddwd xmm3, [rel PW_MF089_F060] ; xmm3=tmp3L
pmaddwd xmm4, [rel PW_MF089_F060] ; xmm4=tmp3H
paddd xmm2, XMMWORD [wk(10)] ; xmm2=tmp0L
paddd xmm0, XMMWORD [wk(11)] ; xmm0=tmp0H
paddd xmm3, xmm5 ; xmm3=tmp3L
paddd xmm4, xmm7 ; xmm4=tmp3H
movdqa XMMWORD [wk(8)], xmm2 ; wk(8)=tmp0L
movdqa XMMWORD [wk(9)], xmm0 ; wk(9)=tmp0H
movdqa xmm2, xmm1
movdqa xmm0, xmm1
punpcklwd xmm2, xmm6
punpckhwd xmm0, xmm6
movdqa xmm1, xmm2
movdqa xmm6, xmm0
pmaddwd xmm2, [rel PW_MF050_MF256] ; xmm2=tmp1L
pmaddwd xmm0, [rel PW_MF050_MF256] ; xmm0=tmp1H
pmaddwd xmm1, [rel PW_MF256_F050] ; xmm1=tmp2L
pmaddwd xmm6, [rel PW_MF256_F050] ; xmm6=tmp2H
paddd xmm2, xmm5 ; xmm2=tmp1L
paddd xmm0, xmm7 ; xmm0=tmp1H
paddd xmm1, XMMWORD [wk(10)] ; xmm1=tmp2L
paddd xmm6, XMMWORD [wk(11)] ; xmm6=tmp2H
movdqa XMMWORD [wk(10)], xmm2 ; wk(10)=tmp1L
movdqa XMMWORD [wk(11)], xmm0 ; wk(11)=tmp1H
; -- Final output stage
movdqa xmm5, XMMWORD [wk(0)] ; xmm5=tmp10L
movdqa xmm7, XMMWORD [wk(1)] ; xmm7=tmp10H
movdqa xmm2, xmm5
movdqa xmm0, xmm7
paddd xmm5, xmm3 ; xmm5=data0L
paddd xmm7, xmm4 ; xmm7=data0H
psubd xmm2, xmm3 ; xmm2=data7L
psubd xmm0, xmm4 ; xmm0=data7H
movdqa xmm3, [rel PD_DESCALE_P1] ; xmm3=[rel PD_DESCALE_P1]
paddd xmm5, xmm3
paddd xmm7, xmm3
psrad xmm5, DESCALE_P1
psrad xmm7, DESCALE_P1
paddd xmm2, xmm3
paddd xmm0, xmm3
psrad xmm2, DESCALE_P1
psrad xmm0, DESCALE_P1
packssdw xmm5, xmm7 ; xmm5=data0=(00 01 02 03 04 05 06 07)
packssdw xmm2, xmm0 ; xmm2=data7=(70 71 72 73 74 75 76 77)
movdqa xmm4, XMMWORD [wk(4)] ; xmm4=tmp11L
movdqa xmm3, XMMWORD [wk(5)] ; xmm3=tmp11H
movdqa xmm7, xmm4
movdqa xmm0, xmm3
paddd xmm4, xmm1 ; xmm4=data1L
paddd xmm3, xmm6 ; xmm3=data1H
psubd xmm7, xmm1 ; xmm7=data6L
psubd xmm0, xmm6 ; xmm0=data6H
movdqa xmm1, [rel PD_DESCALE_P1] ; xmm1=[rel PD_DESCALE_P1]
paddd xmm4, xmm1
paddd xmm3, xmm1
psrad xmm4, DESCALE_P1
psrad xmm3, DESCALE_P1
paddd xmm7, xmm1
paddd xmm0, xmm1
psrad xmm7, DESCALE_P1
psrad xmm0, DESCALE_P1
packssdw xmm4, xmm3 ; xmm4=data1=(10 11 12 13 14 15 16 17)
packssdw xmm7, xmm0 ; xmm7=data6=(60 61 62 63 64 65 66 67)
movdqa xmm6, xmm5 ; transpose coefficients(phase 1)
punpcklwd xmm5, xmm4 ; xmm5=(00 10 01 11 02 12 03 13)
punpckhwd xmm6, xmm4 ; xmm6=(04 14 05 15 06 16 07 17)
movdqa xmm1, xmm7 ; transpose coefficients(phase 1)
punpcklwd xmm7, xmm2 ; xmm7=(60 70 61 71 62 72 63 73)
punpckhwd xmm1, xmm2 ; xmm1=(64 74 65 75 66 76 67 77)
movdqa xmm3, XMMWORD [wk(6)] ; xmm3=tmp12L
movdqa xmm0, XMMWORD [wk(7)] ; xmm0=tmp12H
movdqa xmm4, XMMWORD [wk(10)] ; xmm4=tmp1L
movdqa xmm2, XMMWORD [wk(11)] ; xmm2=tmp1H
movdqa XMMWORD [wk(0)], xmm5 ; wk(0)=(00 10 01 11 02 12 03 13)
movdqa XMMWORD [wk(1)], xmm6 ; wk(1)=(04 14 05 15 06 16 07 17)
movdqa XMMWORD [wk(4)], xmm7 ; wk(4)=(60 70 61 71 62 72 63 73)
movdqa XMMWORD [wk(5)], xmm1 ; wk(5)=(64 74 65 75 66 76 67 77)
movdqa xmm5, xmm3
movdqa xmm6, xmm0
paddd xmm3, xmm4 ; xmm3=data2L
paddd xmm0, xmm2 ; xmm0=data2H
psubd xmm5, xmm4 ; xmm5=data5L
psubd xmm6, xmm2 ; xmm6=data5H
movdqa xmm7, [rel PD_DESCALE_P1] ; xmm7=[rel PD_DESCALE_P1]
paddd xmm3, xmm7
paddd xmm0, xmm7
psrad xmm3, DESCALE_P1
psrad xmm0, DESCALE_P1
paddd xmm5, xmm7
paddd xmm6, xmm7
psrad xmm5, DESCALE_P1
psrad xmm6, DESCALE_P1
packssdw xmm3, xmm0 ; xmm3=data2=(20 21 22 23 24 25 26 27)
packssdw xmm5, xmm6 ; xmm5=data5=(50 51 52 53 54 55 56 57)
movdqa xmm1, XMMWORD [wk(2)] ; xmm1=tmp13L
movdqa xmm4, XMMWORD [wk(3)] ; xmm4=tmp13H
movdqa xmm2, XMMWORD [wk(8)] ; xmm2=tmp0L
movdqa xmm7, XMMWORD [wk(9)] ; xmm7=tmp0H
movdqa xmm0, xmm1
movdqa xmm6, xmm4
paddd xmm1, xmm2 ; xmm1=data3L
paddd xmm4, xmm7 ; xmm4=data3H
psubd xmm0, xmm2 ; xmm0=data4L
psubd xmm6, xmm7 ; xmm6=data4H
movdqa xmm2, [rel PD_DESCALE_P1] ; xmm2=[rel PD_DESCALE_P1]
paddd xmm1, xmm2
paddd xmm4, xmm2
psrad xmm1, DESCALE_P1
psrad xmm4, DESCALE_P1
paddd xmm0, xmm2
paddd xmm6, xmm2
psrad xmm0, DESCALE_P1
psrad xmm6, DESCALE_P1
packssdw xmm1, xmm4 ; xmm1=data3=(30 31 32 33 34 35 36 37)
packssdw xmm0, xmm6 ; xmm0=data4=(40 41 42 43 44 45 46 47)
movdqa xmm7, XMMWORD [wk(0)] ; xmm7=(00 10 01 11 02 12 03 13)
movdqa xmm2, XMMWORD [wk(1)] ; xmm2=(04 14 05 15 06 16 07 17)
movdqa xmm4, xmm3 ; transpose coefficients(phase 1)
punpcklwd xmm3, xmm1 ; xmm3=(20 30 21 31 22 32 23 33)
punpckhwd xmm4, xmm1 ; xmm4=(24 34 25 35 26 36 27 37)
movdqa xmm6, xmm0 ; transpose coefficients(phase 1)
punpcklwd xmm0, xmm5 ; xmm0=(40 50 41 51 42 52 43 53)
punpckhwd xmm6, xmm5 ; xmm6=(44 54 45 55 46 56 47 57)
movdqa xmm1, xmm7 ; transpose coefficients(phase 2)
punpckldq xmm7, xmm3 ; xmm7=(00 10 20 30 01 11 21 31)
punpckhdq xmm1, xmm3 ; xmm1=(02 12 22 32 03 13 23 33)
movdqa xmm5, xmm2 ; transpose coefficients(phase 2)
punpckldq xmm2, xmm4 ; xmm2=(04 14 24 34 05 15 25 35)
punpckhdq xmm5, xmm4 ; xmm5=(06 16 26 36 07 17 27 37)
movdqa xmm3, XMMWORD [wk(4)] ; xmm3=(60 70 61 71 62 72 63 73)
movdqa xmm4, XMMWORD [wk(5)] ; xmm4=(64 74 65 75 66 76 67 77)
movdqa XMMWORD [wk(6)], xmm2 ; wk(6)=(04 14 24 34 05 15 25 35)
movdqa XMMWORD [wk(7)], xmm5 ; wk(7)=(06 16 26 36 07 17 27 37)
movdqa xmm2, xmm0 ; transpose coefficients(phase 2)
punpckldq xmm0, xmm3 ; xmm0=(40 50 60 70 41 51 61 71)
punpckhdq xmm2, xmm3 ; xmm2=(42 52 62 72 43 53 63 73)
movdqa xmm5, xmm6 ; transpose coefficients(phase 2)
punpckldq xmm6, xmm4 ; xmm6=(44 54 64 74 45 55 65 75)
punpckhdq xmm5, xmm4 ; xmm5=(46 56 66 76 47 57 67 77)
movdqa xmm3, xmm7 ; transpose coefficients(phase 3)
punpcklqdq xmm7, xmm0 ; xmm7=col0=(00 10 20 30 40 50 60 70)
punpckhqdq xmm3, xmm0 ; xmm3=col1=(01 11 21 31 41 51 61 71)
movdqa xmm4, xmm1 ; transpose coefficients(phase 3)
punpcklqdq xmm1, xmm2 ; xmm1=col2=(02 12 22 32 42 52 62 72)
punpckhqdq xmm4, xmm2 ; xmm4=col3=(03 13 23 33 43 53 63 73)
movdqa xmm0, XMMWORD [wk(6)] ; xmm0=(04 14 24 34 05 15 25 35)
movdqa xmm2, XMMWORD [wk(7)] ; xmm2=(06 16 26 36 07 17 27 37)
movdqa XMMWORD [wk(8)], xmm3 ; wk(8)=col1
movdqa XMMWORD [wk(9)], xmm4 ; wk(9)=col3
movdqa xmm3, xmm0 ; transpose coefficients(phase 3)
punpcklqdq xmm0, xmm6 ; xmm0=col4=(04 14 24 34 44 54 64 74)
punpckhqdq xmm3, xmm6 ; xmm3=col5=(05 15 25 35 45 55 65 75)
movdqa xmm4, xmm2 ; transpose coefficients(phase 3)
punpcklqdq xmm2, xmm5 ; xmm2=col6=(06 16 26 36 46 56 66 76)
punpckhqdq xmm4, xmm5 ; xmm4=col7=(07 17 27 37 47 57 67 77)
movdqa XMMWORD [wk(10)], xmm3 ; wk(10)=col5
movdqa XMMWORD [wk(11)], xmm4 ; wk(11)=col7
.column_end:
; -- Prefetch the next coefficient block
prefetchnta [rsi + DCTSIZE2*SIZEOF_JCOEF + 0*32]
prefetchnta [rsi + DCTSIZE2*SIZEOF_JCOEF + 1*32]
prefetchnta [rsi + DCTSIZE2*SIZEOF_JCOEF + 2*32]
prefetchnta [rsi + DCTSIZE2*SIZEOF_JCOEF + 3*32]
; ---- Pass 2: process rows from work array, store into output array.
mov rdi, r12 ; (JSAMPROW *)
mov eax, r13d
; -- Even part
; xmm7=col0, xmm1=col2, xmm0=col4, xmm2=col6
; (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;
movdqa xmm6, xmm1 ; xmm1=in2=z2
movdqa xmm5, xmm1
punpcklwd xmm6, xmm2 ; xmm2=in6=z3
punpckhwd xmm5, xmm2
movdqa xmm1, xmm6
movdqa xmm2, xmm5
pmaddwd xmm6, [rel PW_F130_F054] ; xmm6=tmp3L
pmaddwd xmm5, [rel PW_F130_F054] ; xmm5=tmp3H
pmaddwd xmm1, [rel PW_F054_MF130] ; xmm1=tmp2L
pmaddwd xmm2, [rel PW_F054_MF130] ; xmm2=tmp2H
movdqa xmm3, xmm7
paddw xmm7, xmm0 ; xmm7=in0+in4
psubw xmm3, xmm0 ; xmm3=in0-in4
pxor xmm4, xmm4
pxor xmm0, xmm0
punpcklwd xmm4, xmm7 ; xmm4=tmp0L
punpckhwd xmm0, xmm7 ; xmm0=tmp0H
psrad xmm4, (16-CONST_BITS) ; psrad xmm4,16 & pslld xmm4,CONST_BITS
psrad xmm0, (16-CONST_BITS) ; psrad xmm0,16 & pslld xmm0,CONST_BITS
movdqa xmm7, xmm4
paddd xmm4, xmm6 ; xmm4=tmp10L
psubd xmm7, xmm6 ; xmm7=tmp13L
movdqa xmm6, xmm0
paddd xmm0, xmm5 ; xmm0=tmp10H
psubd xmm6, xmm5 ; xmm6=tmp13H
movdqa XMMWORD [wk(0)], xmm4 ; wk(0)=tmp10L
movdqa XMMWORD [wk(1)], xmm0 ; wk(1)=tmp10H
movdqa XMMWORD [wk(2)], xmm7 ; wk(2)=tmp13L
movdqa XMMWORD [wk(3)], xmm6 ; wk(3)=tmp13H
pxor xmm5, xmm5
pxor xmm4, xmm4
punpcklwd xmm5, xmm3 ; xmm5=tmp1L
punpckhwd xmm4, xmm3 ; xmm4=tmp1H
psrad xmm5, (16-CONST_BITS) ; psrad xmm5,16 & pslld xmm5,CONST_BITS
psrad xmm4, (16-CONST_BITS) ; psrad xmm4,16 & pslld xmm4,CONST_BITS
movdqa xmm0, xmm5
paddd xmm5, xmm1 ; xmm5=tmp11L
psubd xmm0, xmm1 ; xmm0=tmp12L
movdqa xmm7, xmm4
paddd xmm4, xmm2 ; xmm4=tmp11H
psubd xmm7, xmm2 ; xmm7=tmp12H
movdqa XMMWORD [wk(4)], xmm5 ; wk(4)=tmp11L
movdqa XMMWORD [wk(5)], xmm4 ; wk(5)=tmp11H
movdqa XMMWORD [wk(6)], xmm0 ; wk(6)=tmp12L
movdqa XMMWORD [wk(7)], xmm7 ; wk(7)=tmp12H
; -- Odd part
movdqa xmm6, XMMWORD [wk(9)] ; xmm6=col3
movdqa xmm3, XMMWORD [wk(8)] ; xmm3=col1
movdqa xmm1, XMMWORD [wk(11)] ; xmm1=col7
movdqa xmm2, XMMWORD [wk(10)] ; xmm2=col5
movdqa xmm5, xmm6
movdqa xmm4, xmm3
paddw xmm5, xmm1 ; xmm5=z3
paddw xmm4, xmm2 ; xmm4=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 xmm0, xmm5
movdqa xmm7, xmm5
punpcklwd xmm0, xmm4
punpckhwd xmm7, xmm4
movdqa xmm5, xmm0
movdqa xmm4, xmm7
pmaddwd xmm0, [rel PW_MF078_F117] ; xmm0=z3L
pmaddwd xmm7, [rel PW_MF078_F117] ; xmm7=z3H
pmaddwd xmm5, [rel PW_F117_F078] ; xmm5=z4L
pmaddwd xmm4, [rel PW_F117_F078] ; xmm4=z4H
movdqa XMMWORD [wk(10)], xmm0 ; wk(10)=z3L
movdqa XMMWORD [wk(11)], xmm7 ; wk(11)=z3H
; (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;
movdqa xmm0, xmm1
movdqa xmm7, xmm1
punpcklwd xmm0, xmm3
punpckhwd xmm7, xmm3
movdqa xmm1, xmm0
movdqa xmm3, xmm7
pmaddwd xmm0, [rel PW_MF060_MF089] ; xmm0=tmp0L
pmaddwd xmm7, [rel PW_MF060_MF089] ; xmm7=tmp0H
pmaddwd xmm1, [rel PW_MF089_F060] ; xmm1=tmp3L
pmaddwd xmm3, [rel PW_MF089_F060] ; xmm3=tmp3H
paddd xmm0, XMMWORD [wk(10)] ; xmm0=tmp0L
paddd xmm7, XMMWORD [wk(11)] ; xmm7=tmp0H
paddd xmm1, xmm5 ; xmm1=tmp3L
paddd xmm3, xmm4 ; xmm3=tmp3H
movdqa XMMWORD [wk(8)], xmm0 ; wk(8)=tmp0L
movdqa XMMWORD [wk(9)], xmm7 ; wk(9)=tmp0H
movdqa xmm0, xmm2
movdqa xmm7, xmm2
punpcklwd xmm0, xmm6
punpckhwd xmm7, xmm6
movdqa xmm2, xmm0
movdqa xmm6, xmm7
pmaddwd xmm0, [rel PW_MF050_MF256] ; xmm0=tmp1L
pmaddwd xmm7, [rel PW_MF050_MF256] ; xmm7=tmp1H
pmaddwd xmm2, [rel PW_MF256_F050] ; xmm2=tmp2L
pmaddwd xmm6, [rel PW_MF256_F050] ; xmm6=tmp2H
paddd xmm0, xmm5 ; xmm0=tmp1L
paddd xmm7, xmm4 ; xmm7=tmp1H
paddd xmm2, XMMWORD [wk(10)] ; xmm2=tmp2L
paddd xmm6, XMMWORD [wk(11)] ; xmm6=tmp2H
movdqa XMMWORD [wk(10)], xmm0 ; wk(10)=tmp1L
movdqa XMMWORD [wk(11)], xmm7 ; wk(11)=tmp1H
; -- Final output stage
movdqa xmm5, XMMWORD [wk(0)] ; xmm5=tmp10L
movdqa xmm4, XMMWORD [wk(1)] ; xmm4=tmp10H
movdqa xmm0, xmm5
movdqa xmm7, xmm4
paddd xmm5, xmm1 ; xmm5=data0L
paddd xmm4, xmm3 ; xmm4=data0H
psubd xmm0, xmm1 ; xmm0=data7L
psubd xmm7, xmm3 ; xmm7=data7H
movdqa xmm1, [rel PD_DESCALE_P2] ; xmm1=[rel PD_DESCALE_P2]
paddd xmm5, xmm1
paddd xmm4, xmm1
psrad xmm5, DESCALE_P2
psrad xmm4, DESCALE_P2
paddd xmm0, xmm1
paddd xmm7, xmm1
psrad xmm0, DESCALE_P2
psrad xmm7, DESCALE_P2
packssdw xmm5, xmm4 ; xmm5=data0=(00 10 20 30 40 50 60 70)
packssdw xmm0, xmm7 ; xmm0=data7=(07 17 27 37 47 57 67 77)
movdqa xmm3, XMMWORD [wk(4)] ; xmm3=tmp11L
movdqa xmm1, XMMWORD [wk(5)] ; xmm1=tmp11H
movdqa xmm4, xmm3
movdqa xmm7, xmm1
paddd xmm3, xmm2 ; xmm3=data1L
paddd xmm1, xmm6 ; xmm1=data1H
psubd xmm4, xmm2 ; xmm4=data6L
psubd xmm7, xmm6 ; xmm7=data6H
movdqa xmm2, [rel PD_DESCALE_P2] ; xmm2=[rel PD_DESCALE_P2]
paddd xmm3, xmm2
paddd xmm1, xmm2
psrad xmm3, DESCALE_P2
psrad xmm1, DESCALE_P2
paddd xmm4, xmm2
paddd xmm7, xmm2
psrad xmm4, DESCALE_P2
psrad xmm7, DESCALE_P2
packssdw xmm3, xmm1 ; xmm3=data1=(01 11 21 31 41 51 61 71)
packssdw xmm4, xmm7 ; xmm4=data6=(06 16 26 36 46 56 66 76)
packsswb xmm5, xmm4 ; xmm5=(00 10 20 30 40 50 60 70 06 16 26 36 46 56 66 76)
packsswb xmm3, xmm0 ; xmm3=(01 11 21 31 41 51 61 71 07 17 27 37 47 57 67 77)
movdqa xmm6, XMMWORD [wk(6)] ; xmm6=tmp12L
movdqa xmm2, XMMWORD [wk(7)] ; xmm2=tmp12H
movdqa xmm1, XMMWORD [wk(10)] ; xmm1=tmp1L
movdqa xmm7, XMMWORD [wk(11)] ; xmm7=tmp1H
movdqa XMMWORD [wk(0)], xmm5 ; wk(0)=(00 10 20 30 40 50 60 70 06 16 26 36 46 56 66 76)
movdqa XMMWORD [wk(1)], xmm3 ; wk(1)=(01 11 21 31 41 51 61 71 07 17 27 37 47 57 67 77)
movdqa xmm4, xmm6
movdqa xmm0, xmm2
paddd xmm6, xmm1 ; xmm6=data2L
paddd xmm2, xmm7 ; xmm2=data2H
psubd xmm4, xmm1 ; xmm4=data5L
psubd xmm0, xmm7 ; xmm0=data5H
movdqa xmm5, [rel PD_DESCALE_P2] ; xmm5=[rel PD_DESCALE_P2]
paddd xmm6, xmm5
paddd xmm2, xmm5
psrad xmm6, DESCALE_P2
psrad xmm2, DESCALE_P2
paddd xmm4, xmm5
paddd xmm0, xmm5
psrad xmm4, DESCALE_P2
psrad xmm0, DESCALE_P2
packssdw xmm6, xmm2 ; xmm6=data2=(02 12 22 32 42 52 62 72)
packssdw xmm4, xmm0 ; xmm4=data5=(05 15 25 35 45 55 65 75)
movdqa xmm3, XMMWORD [wk(2)] ; xmm3=tmp13L
movdqa xmm1, XMMWORD [wk(3)] ; xmm1=tmp13H
movdqa xmm7, XMMWORD [wk(8)] ; xmm7=tmp0L
movdqa xmm5, XMMWORD [wk(9)] ; xmm5=tmp0H
movdqa xmm2, xmm3
movdqa xmm0, xmm1
paddd xmm3, xmm7 ; xmm3=data3L
paddd xmm1, xmm5 ; xmm1=data3H
psubd xmm2, xmm7 ; xmm2=data4L
psubd xmm0, xmm5 ; xmm0=data4H
movdqa xmm7, [rel PD_DESCALE_P2] ; xmm7=[rel PD_DESCALE_P2]
paddd xmm3, xmm7
paddd xmm1, xmm7
psrad xmm3, DESCALE_P2
psrad xmm1, DESCALE_P2
paddd xmm2, xmm7
paddd xmm0, xmm7
psrad xmm2, DESCALE_P2
psrad xmm0, DESCALE_P2
movdqa xmm5, [rel PB_CENTERJSAMP] ; xmm5=[rel PB_CENTERJSAMP]
packssdw xmm3, xmm1 ; xmm3=data3=(03 13 23 33 43 53 63 73)
packssdw xmm2, xmm0 ; xmm2=data4=(04 14 24 34 44 54 64 74)
movdqa xmm7, XMMWORD [wk(0)] ; xmm7=(00 10 20 30 40 50 60 70 06 16 26 36 46 56 66 76)
movdqa xmm1, XMMWORD [wk(1)] ; xmm1=(01 11 21 31 41 51 61 71 07 17 27 37 47 57 67 77)
packsswb xmm6, xmm2 ; xmm6=(02 12 22 32 42 52 62 72 04 14 24 34 44 54 64 74)
packsswb xmm3, xmm4 ; xmm3=(03 13 23 33 43 53 63 73 05 15 25 35 45 55 65 75)
paddb xmm7, xmm5
paddb xmm1, xmm5
paddb xmm6, xmm5
paddb xmm3, xmm5
movdqa xmm0, xmm7 ; transpose coefficients(phase 1)
punpcklbw xmm7, xmm1 ; xmm7=(00 01 10 11 20 21 30 31 40 41 50 51 60 61 70 71)
punpckhbw xmm0, xmm1 ; xmm0=(06 07 16 17 26 27 36 37 46 47 56 57 66 67 76 77)
movdqa xmm2, xmm6 ; transpose coefficients(phase 1)
punpcklbw xmm6, xmm3 ; xmm6=(02 03 12 13 22 23 32 33 42 43 52 53 62 63 72 73)
punpckhbw xmm2, xmm3 ; xmm2=(04 05 14 15 24 25 34 35 44 45 54 55 64 65 74 75)
movdqa xmm4, xmm7 ; transpose coefficients(phase 2)
punpcklwd xmm7, xmm6 ; xmm7=(00 01 02 03 10 11 12 13 20 21 22 23 30 31 32 33)
punpckhwd xmm4, xmm6 ; xmm4=(40 41 42 43 50 51 52 53 60 61 62 63 70 71 72 73)
movdqa xmm5, xmm2 ; transpose coefficients(phase 2)
punpcklwd xmm2, xmm0 ; xmm2=(04 05 06 07 14 15 16 17 24 25 26 27 34 35 36 37)
punpckhwd xmm5, xmm0 ; xmm5=(44 45 46 47 54 55 56 57 64 65 66 67 74 75 76 77)
movdqa xmm1, xmm7 ; transpose coefficients(phase 3)
punpckldq xmm7, xmm2 ; xmm7=(00 01 02 03 04 05 06 07 10 11 12 13 14 15 16 17)
punpckhdq xmm1, xmm2 ; xmm1=(20 21 22 23 24 25 26 27 30 31 32 33 34 35 36 37)
movdqa xmm3, xmm4 ; transpose coefficients(phase 3)
punpckldq xmm4, xmm5 ; xmm4=(40 41 42 43 44 45 46 47 50 51 52 53 54 55 56 57)
punpckhdq xmm3, xmm5 ; xmm3=(60 61 62 63 64 65 66 67 70 71 72 73 74 75 76 77)
pshufd xmm6, xmm7, 0x4E ; xmm6=(10 11 12 13 14 15 16 17 00 01 02 03 04 05 06 07)
pshufd xmm0, xmm1, 0x4E ; xmm0=(30 31 32 33 34 35 36 37 20 21 22 23 24 25 26 27)
pshufd xmm2, xmm4, 0x4E ; xmm2=(50 51 52 53 54 55 56 57 40 41 42 43 44 45 46 47)
pshufd xmm5, xmm3, 0x4E ; xmm5=(70 71 72 73 74 75 76 77 60 61 62 63 64 65 66 67)
mov rdxp, JSAMPROW [rdi+0*SIZEOF_JSAMPROW]
mov rsip, JSAMPROW [rdi+2*SIZEOF_JSAMPROW]
movq XMM_MMWORD [rdx+rax*SIZEOF_JSAMPLE], xmm7
movq XMM_MMWORD [rsi+rax*SIZEOF_JSAMPLE], xmm1
mov rdxp, JSAMPROW [rdi+4*SIZEOF_JSAMPROW]
mov rsip, JSAMPROW [rdi+6*SIZEOF_JSAMPROW]
movq XMM_MMWORD [rdx+rax*SIZEOF_JSAMPLE], xmm4
movq XMM_MMWORD [rsi+rax*SIZEOF_JSAMPLE], xmm3
mov rdxp, JSAMPROW [rdi+1*SIZEOF_JSAMPROW]
mov rsip, JSAMPROW [rdi+3*SIZEOF_JSAMPROW]
movq XMM_MMWORD [rdx+rax*SIZEOF_JSAMPLE], xmm6
movq XMM_MMWORD [rsi+rax*SIZEOF_JSAMPLE], xmm0
mov rdxp, JSAMPROW [rdi+5*SIZEOF_JSAMPROW]
mov rsip, JSAMPROW [rdi+7*SIZEOF_JSAMPROW]
movq XMM_MMWORD [rdx+rax*SIZEOF_JSAMPLE], xmm2
movq XMM_MMWORD [rsi+rax*SIZEOF_JSAMPLE], xmm5
UNCOLLECT_ARGS 4
lea rsp, [rbp-8]
pop r15
pop rbp
ret
; For some reason, the OS X linker does not honor the request to align the
; segment unless we do this.
align 32