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MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +00001;
DRC72130be2014-05-09 20:14:26 +00002; jidctred.asm - reduced-size IDCT (SSE2)
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +00003;
Pierre Ossmaneea72152009-03-09 13:34:17 +00004; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
5;
6; Based on
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +00007; x86 SIMD extension for IJG JPEG library
8; Copyright (C) 1999-2006, MIYASAKA Masaru.
9; For conditions of distribution and use, see copyright notice in jsimdext.inc
10;
11; This file should be assembled with NASM (Netwide Assembler),
12; can *not* be assembled with Microsoft's MASM or any compatible
13; assembler (including Borland's Turbo Assembler).
14; NASM is available from http://nasm.sourceforge.net/ or
15; http://sourceforge.net/project/showfiles.php?group_id=6208
16;
17; This file contains inverse-DCT routines that produce reduced-size
18; output: either 4x4 or 2x2 pixels from an 8x8 DCT block.
19; The following code is based directly on the IJG's original jidctred.c;
20; see the jidctred.c for more details.
21;
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +000022; [TAB8]
23
Pierre Ossman3a65ef42009-03-16 13:34:18 +000024%include "jsimdext.inc"
25%include "jdct.inc"
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +000026
27; --------------------------------------------------------------------------
28
DRCe5eaf372014-05-09 18:00:32 +000029%define CONST_BITS 13
30%define PASS1_BITS 2
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +000031
DRCe5eaf372014-05-09 18:00:32 +000032%define DESCALE_P1_4 (CONST_BITS-PASS1_BITS+1)
33%define DESCALE_P2_4 (CONST_BITS+PASS1_BITS+3+1)
34%define DESCALE_P1_2 (CONST_BITS-PASS1_BITS+2)
35%define DESCALE_P2_2 (CONST_BITS+PASS1_BITS+3+2)
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +000036
37%if CONST_BITS == 13
DRCe5eaf372014-05-09 18:00:32 +000038F_0_211 equ 1730 ; FIX(0.211164243)
39F_0_509 equ 4176 ; FIX(0.509795579)
40F_0_601 equ 4926 ; FIX(0.601344887)
41F_0_720 equ 5906 ; FIX(0.720959822)
42F_0_765 equ 6270 ; FIX(0.765366865)
43F_0_850 equ 6967 ; FIX(0.850430095)
44F_0_899 equ 7373 ; FIX(0.899976223)
45F_1_061 equ 8697 ; FIX(1.061594337)
46F_1_272 equ 10426 ; FIX(1.272758580)
47F_1_451 equ 11893 ; FIX(1.451774981)
48F_1_847 equ 15137 ; FIX(1.847759065)
49F_2_172 equ 17799 ; FIX(2.172734803)
50F_2_562 equ 20995 ; FIX(2.562915447)
51F_3_624 equ 29692 ; FIX(3.624509785)
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +000052%else
53; NASM cannot do compile-time arithmetic on floating-point constants.
54%define DESCALE(x,n) (((x)+(1<<((n)-1)))>>(n))
DRCe5eaf372014-05-09 18:00:32 +000055F_0_211 equ DESCALE( 226735879,30-CONST_BITS) ; FIX(0.211164243)
56F_0_509 equ DESCALE( 547388834,30-CONST_BITS) ; FIX(0.509795579)
57F_0_601 equ DESCALE( 645689155,30-CONST_BITS) ; FIX(0.601344887)
58F_0_720 equ DESCALE( 774124714,30-CONST_BITS) ; FIX(0.720959822)
59F_0_765 equ DESCALE( 821806413,30-CONST_BITS) ; FIX(0.765366865)
60F_0_850 equ DESCALE( 913142361,30-CONST_BITS) ; FIX(0.850430095)
61F_0_899 equ DESCALE( 966342111,30-CONST_BITS) ; FIX(0.899976223)
62F_1_061 equ DESCALE(1139878239,30-CONST_BITS) ; FIX(1.061594337)
63F_1_272 equ DESCALE(1366614119,30-CONST_BITS) ; FIX(1.272758580)
64F_1_451 equ DESCALE(1558831516,30-CONST_BITS) ; FIX(1.451774981)
65F_1_847 equ DESCALE(1984016188,30-CONST_BITS) ; FIX(1.847759065)
66F_2_172 equ DESCALE(2332956230,30-CONST_BITS) ; FIX(2.172734803)
67F_2_562 equ DESCALE(2751909506,30-CONST_BITS) ; FIX(2.562915447)
68F_3_624 equ DESCALE(3891787747,30-CONST_BITS) ; FIX(3.624509785)
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +000069%endif
70
71; --------------------------------------------------------------------------
DRCe5eaf372014-05-09 18:00:32 +000072 SECTION SEG_CONST
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +000073
DRCe5eaf372014-05-09 18:00:32 +000074 alignz 16
75 global EXTN(jconst_idct_red_sse2)
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +000076
77EXTN(jconst_idct_red_sse2):
78
DRCe5eaf372014-05-09 18:00:32 +000079PW_F184_MF076 times 4 dw F_1_847,-F_0_765
80PW_F256_F089 times 4 dw F_2_562, F_0_899
81PW_F106_MF217 times 4 dw F_1_061,-F_2_172
82PW_MF060_MF050 times 4 dw -F_0_601,-F_0_509
83PW_F145_MF021 times 4 dw F_1_451,-F_0_211
84PW_F362_MF127 times 4 dw F_3_624,-F_1_272
85PW_F085_MF072 times 4 dw F_0_850,-F_0_720
86PD_DESCALE_P1_4 times 4 dd 1 << (DESCALE_P1_4-1)
87PD_DESCALE_P2_4 times 4 dd 1 << (DESCALE_P2_4-1)
88PD_DESCALE_P1_2 times 4 dd 1 << (DESCALE_P1_2-1)
89PD_DESCALE_P2_2 times 4 dd 1 << (DESCALE_P2_2-1)
90PB_CENTERJSAMP times 16 db CENTERJSAMPLE
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +000091
DRCe5eaf372014-05-09 18:00:32 +000092 alignz 16
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +000093
94; --------------------------------------------------------------------------
DRCe5eaf372014-05-09 18:00:32 +000095 SECTION SEG_TEXT
96 BITS 32
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +000097;
98; Perform dequantization and inverse DCT on one block of coefficients,
99; producing a reduced-size 4x4 output block.
100;
101; GLOBAL(void)
DRCbd498032016-02-19 08:53:33 -0600102; jsimd_idct_4x4_sse2 (void *dct_table, JCOEFPTR coef_block,
Pierre Ossmaneea72152009-03-09 13:34:17 +0000103; JSAMPARRAY output_buf, JDIMENSION output_col)
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000104;
105
DRCbd498032016-02-19 08:53:33 -0600106%define dct_table(b) (b)+8 ; void *dct_table
DRCe5eaf372014-05-09 18:00:32 +0000107%define coef_block(b) (b)+12 ; JCOEFPTR coef_block
108%define output_buf(b) (b)+16 ; JSAMPARRAY output_buf
109%define output_col(b) (b)+20 ; JDIMENSION output_col
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000110
DRCe5eaf372014-05-09 18:00:32 +0000111%define original_ebp ebp+0
112%define wk(i) ebp-(WK_NUM-(i))*SIZEOF_XMMWORD ; xmmword wk[WK_NUM]
113%define WK_NUM 2
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000114
DRCe5eaf372014-05-09 18:00:32 +0000115 align 16
116 global EXTN(jsimd_idct_4x4_sse2)
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000117
Pierre Ossmaneea72152009-03-09 13:34:17 +0000118EXTN(jsimd_idct_4x4_sse2):
DRCe5eaf372014-05-09 18:00:32 +0000119 push ebp
120 mov eax,esp ; eax = original ebp
121 sub esp, byte 4
122 and esp, byte (-SIZEOF_XMMWORD) ; align to 128 bits
123 mov [esp],eax
124 mov ebp,esp ; ebp = aligned ebp
125 lea esp, [wk(0)]
126 pushpic ebx
127; push ecx ; unused
128; push edx ; need not be preserved
129 push esi
130 push edi
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000131
DRCe5eaf372014-05-09 18:00:32 +0000132 get_GOT ebx ; get GOT address
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000133
DRCe5eaf372014-05-09 18:00:32 +0000134 ; ---- Pass 1: process columns from input.
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000135
DRCe5eaf372014-05-09 18:00:32 +0000136; mov eax, [original_ebp]
137 mov edx, POINTER [dct_table(eax)] ; quantptr
138 mov esi, JCOEFPTR [coef_block(eax)] ; inptr
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000139
140%ifndef NO_ZERO_COLUMN_TEST_4X4_SSE2
DRCe5eaf372014-05-09 18:00:32 +0000141 mov eax, DWORD [DWBLOCK(1,0,esi,SIZEOF_JCOEF)]
142 or eax, DWORD [DWBLOCK(2,0,esi,SIZEOF_JCOEF)]
143 jnz short .columnDCT
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000144
DRCe5eaf372014-05-09 18:00:32 +0000145 movdqa xmm0, XMMWORD [XMMBLOCK(1,0,esi,SIZEOF_JCOEF)]
146 movdqa xmm1, XMMWORD [XMMBLOCK(2,0,esi,SIZEOF_JCOEF)]
147 por xmm0, XMMWORD [XMMBLOCK(3,0,esi,SIZEOF_JCOEF)]
148 por xmm1, XMMWORD [XMMBLOCK(5,0,esi,SIZEOF_JCOEF)]
149 por xmm0, XMMWORD [XMMBLOCK(6,0,esi,SIZEOF_JCOEF)]
150 por xmm1, XMMWORD [XMMBLOCK(7,0,esi,SIZEOF_JCOEF)]
151 por xmm0,xmm1
152 packsswb xmm0,xmm0
153 packsswb xmm0,xmm0
154 movd eax,xmm0
155 test eax,eax
156 jnz short .columnDCT
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000157
DRCe5eaf372014-05-09 18:00:32 +0000158 ; -- AC terms all zero
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000159
DRCe5eaf372014-05-09 18:00:32 +0000160 movdqa xmm0, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_JCOEF)]
161 pmullw xmm0, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000162
DRCe5eaf372014-05-09 18:00:32 +0000163 psllw xmm0,PASS1_BITS
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000164
DRCe5eaf372014-05-09 18:00:32 +0000165 movdqa xmm3,xmm0 ; xmm0=in0=(00 01 02 03 04 05 06 07)
166 punpcklwd xmm0,xmm0 ; xmm0=(00 00 01 01 02 02 03 03)
167 punpckhwd xmm3,xmm3 ; xmm3=(04 04 05 05 06 06 07 07)
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000168
DRCe5eaf372014-05-09 18:00:32 +0000169 pshufd xmm1,xmm0,0x50 ; xmm1=[col0 col1]=(00 00 00 00 01 01 01 01)
170 pshufd xmm0,xmm0,0xFA ; xmm0=[col2 col3]=(02 02 02 02 03 03 03 03)
171 pshufd xmm6,xmm3,0x50 ; xmm6=[col4 col5]=(04 04 04 04 05 05 05 05)
172 pshufd xmm3,xmm3,0xFA ; xmm3=[col6 col7]=(06 06 06 06 07 07 07 07)
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000173
DRCe5eaf372014-05-09 18:00:32 +0000174 jmp near .column_end
175 alignx 16,7
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000176%endif
177.columnDCT:
178
DRCe5eaf372014-05-09 18:00:32 +0000179 ; -- Odd part
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000180
DRCe5eaf372014-05-09 18:00:32 +0000181 movdqa xmm0, XMMWORD [XMMBLOCK(1,0,esi,SIZEOF_JCOEF)]
182 movdqa xmm1, XMMWORD [XMMBLOCK(3,0,esi,SIZEOF_JCOEF)]
183 pmullw xmm0, XMMWORD [XMMBLOCK(1,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
184 pmullw xmm1, XMMWORD [XMMBLOCK(3,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
185 movdqa xmm2, XMMWORD [XMMBLOCK(5,0,esi,SIZEOF_JCOEF)]
186 movdqa xmm3, XMMWORD [XMMBLOCK(7,0,esi,SIZEOF_JCOEF)]
187 pmullw xmm2, XMMWORD [XMMBLOCK(5,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
188 pmullw xmm3, XMMWORD [XMMBLOCK(7,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000189
DRCe5eaf372014-05-09 18:00:32 +0000190 movdqa xmm4,xmm0
191 movdqa xmm5,xmm0
192 punpcklwd xmm4,xmm1
193 punpckhwd xmm5,xmm1
194 movdqa xmm0,xmm4
195 movdqa xmm1,xmm5
196 pmaddwd xmm4,[GOTOFF(ebx,PW_F256_F089)] ; xmm4=(tmp2L)
197 pmaddwd xmm5,[GOTOFF(ebx,PW_F256_F089)] ; xmm5=(tmp2H)
198 pmaddwd xmm0,[GOTOFF(ebx,PW_F106_MF217)] ; xmm0=(tmp0L)
199 pmaddwd xmm1,[GOTOFF(ebx,PW_F106_MF217)] ; xmm1=(tmp0H)
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000200
DRCe5eaf372014-05-09 18:00:32 +0000201 movdqa xmm6,xmm2
202 movdqa xmm7,xmm2
203 punpcklwd xmm6,xmm3
204 punpckhwd xmm7,xmm3
205 movdqa xmm2,xmm6
206 movdqa xmm3,xmm7
207 pmaddwd xmm6,[GOTOFF(ebx,PW_MF060_MF050)] ; xmm6=(tmp2L)
208 pmaddwd xmm7,[GOTOFF(ebx,PW_MF060_MF050)] ; xmm7=(tmp2H)
209 pmaddwd xmm2,[GOTOFF(ebx,PW_F145_MF021)] ; xmm2=(tmp0L)
210 pmaddwd xmm3,[GOTOFF(ebx,PW_F145_MF021)] ; xmm3=(tmp0H)
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000211
DRCe5eaf372014-05-09 18:00:32 +0000212 paddd xmm6,xmm4 ; xmm6=tmp2L
213 paddd xmm7,xmm5 ; xmm7=tmp2H
214 paddd xmm2,xmm0 ; xmm2=tmp0L
215 paddd xmm3,xmm1 ; xmm3=tmp0H
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000216
DRCe5eaf372014-05-09 18:00:32 +0000217 movdqa XMMWORD [wk(0)], xmm2 ; wk(0)=tmp0L
218 movdqa XMMWORD [wk(1)], xmm3 ; wk(1)=tmp0H
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000219
DRCe5eaf372014-05-09 18:00:32 +0000220 ; -- Even part
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000221
DRCe5eaf372014-05-09 18:00:32 +0000222 movdqa xmm4, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_JCOEF)]
223 movdqa xmm5, XMMWORD [XMMBLOCK(2,0,esi,SIZEOF_JCOEF)]
224 movdqa xmm0, XMMWORD [XMMBLOCK(6,0,esi,SIZEOF_JCOEF)]
225 pmullw xmm4, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
226 pmullw xmm5, XMMWORD [XMMBLOCK(2,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
227 pmullw xmm0, XMMWORD [XMMBLOCK(6,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000228
DRCe5eaf372014-05-09 18:00:32 +0000229 pxor xmm1,xmm1
230 pxor xmm2,xmm2
231 punpcklwd xmm1,xmm4 ; xmm1=tmp0L
232 punpckhwd xmm2,xmm4 ; xmm2=tmp0H
233 psrad xmm1,(16-CONST_BITS-1) ; psrad xmm1,16 & pslld xmm1,CONST_BITS+1
234 psrad xmm2,(16-CONST_BITS-1) ; psrad xmm2,16 & pslld xmm2,CONST_BITS+1
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000235
DRCe5eaf372014-05-09 18:00:32 +0000236 movdqa xmm3,xmm5 ; xmm5=in2=z2
237 punpcklwd xmm5,xmm0 ; xmm0=in6=z3
238 punpckhwd xmm3,xmm0
239 pmaddwd xmm5,[GOTOFF(ebx,PW_F184_MF076)] ; xmm5=tmp2L
240 pmaddwd xmm3,[GOTOFF(ebx,PW_F184_MF076)] ; xmm3=tmp2H
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000241
DRCe5eaf372014-05-09 18:00:32 +0000242 movdqa xmm4,xmm1
243 movdqa xmm0,xmm2
244 paddd xmm1,xmm5 ; xmm1=tmp10L
245 paddd xmm2,xmm3 ; xmm2=tmp10H
246 psubd xmm4,xmm5 ; xmm4=tmp12L
247 psubd xmm0,xmm3 ; xmm0=tmp12H
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000248
DRCe5eaf372014-05-09 18:00:32 +0000249 ; -- Final output stage
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000250
DRCe5eaf372014-05-09 18:00:32 +0000251 movdqa xmm5,xmm1
252 movdqa xmm3,xmm2
253 paddd xmm1,xmm6 ; xmm1=data0L
254 paddd xmm2,xmm7 ; xmm2=data0H
255 psubd xmm5,xmm6 ; xmm5=data3L
256 psubd xmm3,xmm7 ; xmm3=data3H
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000257
DRCe5eaf372014-05-09 18:00:32 +0000258 movdqa xmm6,[GOTOFF(ebx,PD_DESCALE_P1_4)] ; xmm6=[PD_DESCALE_P1_4]
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000259
DRCe5eaf372014-05-09 18:00:32 +0000260 paddd xmm1,xmm6
261 paddd xmm2,xmm6
262 psrad xmm1,DESCALE_P1_4
263 psrad xmm2,DESCALE_P1_4
264 paddd xmm5,xmm6
265 paddd xmm3,xmm6
266 psrad xmm5,DESCALE_P1_4
267 psrad xmm3,DESCALE_P1_4
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000268
DRCe5eaf372014-05-09 18:00:32 +0000269 packssdw xmm1,xmm2 ; xmm1=data0=(00 01 02 03 04 05 06 07)
270 packssdw xmm5,xmm3 ; xmm5=data3=(30 31 32 33 34 35 36 37)
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000271
DRCe5eaf372014-05-09 18:00:32 +0000272 movdqa xmm7, XMMWORD [wk(0)] ; xmm7=tmp0L
273 movdqa xmm6, XMMWORD [wk(1)] ; xmm6=tmp0H
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000274
DRCe5eaf372014-05-09 18:00:32 +0000275 movdqa xmm2,xmm4
276 movdqa xmm3,xmm0
277 paddd xmm4,xmm7 ; xmm4=data1L
278 paddd xmm0,xmm6 ; xmm0=data1H
279 psubd xmm2,xmm7 ; xmm2=data2L
280 psubd xmm3,xmm6 ; xmm3=data2H
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000281
DRCe5eaf372014-05-09 18:00:32 +0000282 movdqa xmm7,[GOTOFF(ebx,PD_DESCALE_P1_4)] ; xmm7=[PD_DESCALE_P1_4]
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000283
DRCe5eaf372014-05-09 18:00:32 +0000284 paddd xmm4,xmm7
285 paddd xmm0,xmm7
286 psrad xmm4,DESCALE_P1_4
287 psrad xmm0,DESCALE_P1_4
288 paddd xmm2,xmm7
289 paddd xmm3,xmm7
290 psrad xmm2,DESCALE_P1_4
291 psrad xmm3,DESCALE_P1_4
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000292
DRCe5eaf372014-05-09 18:00:32 +0000293 packssdw xmm4,xmm0 ; xmm4=data1=(10 11 12 13 14 15 16 17)
294 packssdw xmm2,xmm3 ; xmm2=data2=(20 21 22 23 24 25 26 27)
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000295
DRCe5eaf372014-05-09 18:00:32 +0000296 movdqa xmm6,xmm1 ; transpose coefficients(phase 1)
297 punpcklwd xmm1,xmm4 ; xmm1=(00 10 01 11 02 12 03 13)
298 punpckhwd xmm6,xmm4 ; xmm6=(04 14 05 15 06 16 07 17)
299 movdqa xmm7,xmm2 ; transpose coefficients(phase 1)
300 punpcklwd xmm2,xmm5 ; xmm2=(20 30 21 31 22 32 23 33)
301 punpckhwd xmm7,xmm5 ; xmm7=(24 34 25 35 26 36 27 37)
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000302
DRCe5eaf372014-05-09 18:00:32 +0000303 movdqa xmm0,xmm1 ; transpose coefficients(phase 2)
304 punpckldq xmm1,xmm2 ; xmm1=[col0 col1]=(00 10 20 30 01 11 21 31)
305 punpckhdq xmm0,xmm2 ; xmm0=[col2 col3]=(02 12 22 32 03 13 23 33)
306 movdqa xmm3,xmm6 ; transpose coefficients(phase 2)
307 punpckldq xmm6,xmm7 ; xmm6=[col4 col5]=(04 14 24 34 05 15 25 35)
308 punpckhdq xmm3,xmm7 ; xmm3=[col6 col7]=(06 16 26 36 07 17 27 37)
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000309.column_end:
310
DRCe5eaf372014-05-09 18:00:32 +0000311 ; -- Prefetch the next coefficient block
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000312
DRCe5eaf372014-05-09 18:00:32 +0000313 prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 0*32]
314 prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 1*32]
315 prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 2*32]
316 prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 3*32]
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000317
DRCe5eaf372014-05-09 18:00:32 +0000318 ; ---- Pass 2: process rows, store into output array.
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000319
DRCe5eaf372014-05-09 18:00:32 +0000320 mov eax, [original_ebp]
321 mov edi, JSAMPARRAY [output_buf(eax)] ; (JSAMPROW *)
322 mov eax, JDIMENSION [output_col(eax)]
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000323
DRCe5eaf372014-05-09 18:00:32 +0000324 ; -- Even part
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000325
DRCe5eaf372014-05-09 18:00:32 +0000326 pxor xmm4,xmm4
327 punpcklwd xmm4,xmm1 ; xmm4=tmp0
328 psrad xmm4,(16-CONST_BITS-1) ; psrad xmm4,16 & pslld xmm4,CONST_BITS+1
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000329
DRCe5eaf372014-05-09 18:00:32 +0000330 ; -- Odd part
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000331
DRCe5eaf372014-05-09 18:00:32 +0000332 punpckhwd xmm1,xmm0
333 punpckhwd xmm6,xmm3
334 movdqa xmm5,xmm1
335 movdqa xmm2,xmm6
336 pmaddwd xmm1,[GOTOFF(ebx,PW_F256_F089)] ; xmm1=(tmp2)
337 pmaddwd xmm6,[GOTOFF(ebx,PW_MF060_MF050)] ; xmm6=(tmp2)
338 pmaddwd xmm5,[GOTOFF(ebx,PW_F106_MF217)] ; xmm5=(tmp0)
339 pmaddwd xmm2,[GOTOFF(ebx,PW_F145_MF021)] ; xmm2=(tmp0)
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000340
DRCe5eaf372014-05-09 18:00:32 +0000341 paddd xmm6,xmm1 ; xmm6=tmp2
342 paddd xmm2,xmm5 ; xmm2=tmp0
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000343
DRCe5eaf372014-05-09 18:00:32 +0000344 ; -- Even part
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000345
DRCe5eaf372014-05-09 18:00:32 +0000346 punpcklwd xmm0,xmm3
347 pmaddwd xmm0,[GOTOFF(ebx,PW_F184_MF076)] ; xmm0=tmp2
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000348
DRCe5eaf372014-05-09 18:00:32 +0000349 movdqa xmm7,xmm4
350 paddd xmm4,xmm0 ; xmm4=tmp10
351 psubd xmm7,xmm0 ; xmm7=tmp12
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000352
DRCe5eaf372014-05-09 18:00:32 +0000353 ; -- Final output stage
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000354
DRCe5eaf372014-05-09 18:00:32 +0000355 movdqa xmm1,[GOTOFF(ebx,PD_DESCALE_P2_4)] ; xmm1=[PD_DESCALE_P2_4]
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000356
DRCe5eaf372014-05-09 18:00:32 +0000357 movdqa xmm5,xmm4
358 movdqa xmm3,xmm7
359 paddd xmm4,xmm6 ; xmm4=data0=(00 10 20 30)
360 paddd xmm7,xmm2 ; xmm7=data1=(01 11 21 31)
361 psubd xmm5,xmm6 ; xmm5=data3=(03 13 23 33)
362 psubd xmm3,xmm2 ; xmm3=data2=(02 12 22 32)
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000363
DRCe5eaf372014-05-09 18:00:32 +0000364 paddd xmm4,xmm1
365 paddd xmm7,xmm1
366 psrad xmm4,DESCALE_P2_4
367 psrad xmm7,DESCALE_P2_4
368 paddd xmm5,xmm1
369 paddd xmm3,xmm1
370 psrad xmm5,DESCALE_P2_4
371 psrad xmm3,DESCALE_P2_4
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000372
DRCe5eaf372014-05-09 18:00:32 +0000373 packssdw xmm4,xmm3 ; xmm4=(00 10 20 30 02 12 22 32)
374 packssdw xmm7,xmm5 ; xmm7=(01 11 21 31 03 13 23 33)
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000375
DRCe5eaf372014-05-09 18:00:32 +0000376 movdqa xmm0,xmm4 ; transpose coefficients(phase 1)
377 punpcklwd xmm4,xmm7 ; xmm4=(00 01 10 11 20 21 30 31)
378 punpckhwd xmm0,xmm7 ; xmm0=(02 03 12 13 22 23 32 33)
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000379
DRCe5eaf372014-05-09 18:00:32 +0000380 movdqa xmm6,xmm4 ; transpose coefficients(phase 2)
381 punpckldq xmm4,xmm0 ; xmm4=(00 01 02 03 10 11 12 13)
382 punpckhdq xmm6,xmm0 ; xmm6=(20 21 22 23 30 31 32 33)
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000383
DRCe5eaf372014-05-09 18:00:32 +0000384 packsswb xmm4,xmm6 ; xmm4=(00 01 02 03 10 11 12 13 20 ..)
385 paddb xmm4,[GOTOFF(ebx,PB_CENTERJSAMP)]
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000386
DRCe5eaf372014-05-09 18:00:32 +0000387 pshufd xmm2,xmm4,0x39 ; xmm2=(10 11 12 13 20 21 22 23 30 ..)
388 pshufd xmm1,xmm4,0x4E ; xmm1=(20 21 22 23 30 31 32 33 00 ..)
389 pshufd xmm3,xmm4,0x93 ; xmm3=(30 31 32 33 00 01 02 03 10 ..)
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000390
DRCe5eaf372014-05-09 18:00:32 +0000391 mov edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW]
392 mov esi, JSAMPROW [edi+1*SIZEOF_JSAMPROW]
393 movd XMM_DWORD [edx+eax*SIZEOF_JSAMPLE], xmm4
394 movd XMM_DWORD [esi+eax*SIZEOF_JSAMPLE], xmm2
395 mov edx, JSAMPROW [edi+2*SIZEOF_JSAMPROW]
396 mov esi, JSAMPROW [edi+3*SIZEOF_JSAMPROW]
397 movd XMM_DWORD [edx+eax*SIZEOF_JSAMPLE], xmm1
398 movd XMM_DWORD [esi+eax*SIZEOF_JSAMPLE], xmm3
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000399
DRCe5eaf372014-05-09 18:00:32 +0000400 pop edi
401 pop esi
402; pop edx ; need not be preserved
403; pop ecx ; unused
404 poppic ebx
405 mov esp,ebp ; esp <- aligned ebp
406 pop esp ; esp <- original ebp
407 pop ebp
408 ret
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000409
410
411; --------------------------------------------------------------------------
412;
413; Perform dequantization and inverse DCT on one block of coefficients,
414; producing a reduced-size 2x2 output block.
415;
416; GLOBAL(void)
DRCbd498032016-02-19 08:53:33 -0600417; jsimd_idct_2x2_sse2 (void *dct_table, JCOEFPTR coef_block,
Pierre Ossmaneea72152009-03-09 13:34:17 +0000418; JSAMPARRAY output_buf, JDIMENSION output_col)
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000419;
420
DRCbd498032016-02-19 08:53:33 -0600421%define dct_table(b) (b)+8 ; void *dct_table
DRCe5eaf372014-05-09 18:00:32 +0000422%define coef_block(b) (b)+12 ; JCOEFPTR coef_block
423%define output_buf(b) (b)+16 ; JSAMPARRAY output_buf
424%define output_col(b) (b)+20 ; JDIMENSION output_col
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000425
DRCe5eaf372014-05-09 18:00:32 +0000426 align 16
427 global EXTN(jsimd_idct_2x2_sse2)
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000428
Pierre Ossmaneea72152009-03-09 13:34:17 +0000429EXTN(jsimd_idct_2x2_sse2):
DRCe5eaf372014-05-09 18:00:32 +0000430 push ebp
431 mov ebp,esp
432 push ebx
433; push ecx ; need not be preserved
434; push edx ; need not be preserved
435 push esi
436 push edi
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000437
DRCe5eaf372014-05-09 18:00:32 +0000438 get_GOT ebx ; get GOT address
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000439
DRCe5eaf372014-05-09 18:00:32 +0000440 ; ---- Pass 1: process columns from input.
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000441
DRCe5eaf372014-05-09 18:00:32 +0000442 mov edx, POINTER [dct_table(ebp)] ; quantptr
443 mov esi, JCOEFPTR [coef_block(ebp)] ; inptr
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000444
DRCe5eaf372014-05-09 18:00:32 +0000445 ; | input: | result: |
446 ; | 00 01 ** 03 ** 05 ** 07 | |
447 ; | 10 11 ** 13 ** 15 ** 17 | |
448 ; | ** ** ** ** ** ** ** ** | |
449 ; | 30 31 ** 33 ** 35 ** 37 | A0 A1 A3 A5 A7 |
450 ; | ** ** ** ** ** ** ** ** | B0 B1 B3 B5 B7 |
451 ; | 50 51 ** 53 ** 55 ** 57 | |
452 ; | ** ** ** ** ** ** ** ** | |
453 ; | 70 71 ** 73 ** 75 ** 77 | |
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000454
DRCe5eaf372014-05-09 18:00:32 +0000455 ; -- Odd part
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000456
DRCe5eaf372014-05-09 18:00:32 +0000457 movdqa xmm0, XMMWORD [XMMBLOCK(1,0,esi,SIZEOF_JCOEF)]
458 movdqa xmm1, XMMWORD [XMMBLOCK(3,0,esi,SIZEOF_JCOEF)]
459 pmullw xmm0, XMMWORD [XMMBLOCK(1,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
460 pmullw xmm1, XMMWORD [XMMBLOCK(3,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
461 movdqa xmm2, XMMWORD [XMMBLOCK(5,0,esi,SIZEOF_JCOEF)]
462 movdqa xmm3, XMMWORD [XMMBLOCK(7,0,esi,SIZEOF_JCOEF)]
463 pmullw xmm2, XMMWORD [XMMBLOCK(5,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
464 pmullw xmm3, XMMWORD [XMMBLOCK(7,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000465
DRCe5eaf372014-05-09 18:00:32 +0000466 ; xmm0=(10 11 ** 13 ** 15 ** 17), xmm1=(30 31 ** 33 ** 35 ** 37)
467 ; xmm2=(50 51 ** 53 ** 55 ** 57), xmm3=(70 71 ** 73 ** 75 ** 77)
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000468
DRCe5eaf372014-05-09 18:00:32 +0000469 pcmpeqd xmm7,xmm7
470 pslld xmm7,WORD_BIT ; xmm7={0x0000 0xFFFF 0x0000 0xFFFF ..}
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000471
DRCe5eaf372014-05-09 18:00:32 +0000472 movdqa xmm4,xmm0 ; xmm4=(10 11 ** 13 ** 15 ** 17)
473 movdqa xmm5,xmm2 ; xmm5=(50 51 ** 53 ** 55 ** 57)
474 punpcklwd xmm4,xmm1 ; xmm4=(10 30 11 31 ** ** 13 33)
475 punpcklwd xmm5,xmm3 ; xmm5=(50 70 51 71 ** ** 53 73)
476 pmaddwd xmm4,[GOTOFF(ebx,PW_F362_MF127)]
477 pmaddwd xmm5,[GOTOFF(ebx,PW_F085_MF072)]
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000478
DRCe5eaf372014-05-09 18:00:32 +0000479 psrld xmm0,WORD_BIT ; xmm0=(11 -- 13 -- 15 -- 17 --)
480 pand xmm1,xmm7 ; xmm1=(-- 31 -- 33 -- 35 -- 37)
481 psrld xmm2,WORD_BIT ; xmm2=(51 -- 53 -- 55 -- 57 --)
482 pand xmm3,xmm7 ; xmm3=(-- 71 -- 73 -- 75 -- 77)
483 por xmm0,xmm1 ; xmm0=(11 31 13 33 15 35 17 37)
484 por xmm2,xmm3 ; xmm2=(51 71 53 73 55 75 57 77)
485 pmaddwd xmm0,[GOTOFF(ebx,PW_F362_MF127)]
486 pmaddwd xmm2,[GOTOFF(ebx,PW_F085_MF072)]
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000487
DRCe5eaf372014-05-09 18:00:32 +0000488 paddd xmm4,xmm5 ; xmm4=tmp0[col0 col1 **** col3]
489 paddd xmm0,xmm2 ; xmm0=tmp0[col1 col3 col5 col7]
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000490
DRCe5eaf372014-05-09 18:00:32 +0000491 ; -- Even part
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000492
DRCe5eaf372014-05-09 18:00:32 +0000493 movdqa xmm6, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_JCOEF)]
494 pmullw xmm6, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000495
DRCe5eaf372014-05-09 18:00:32 +0000496 ; xmm6=(00 01 ** 03 ** 05 ** 07)
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000497
DRCe5eaf372014-05-09 18:00:32 +0000498 movdqa xmm1,xmm6 ; xmm1=(00 01 ** 03 ** 05 ** 07)
499 pslld xmm6,WORD_BIT ; xmm6=(-- 00 -- ** -- ** -- **)
500 pand xmm1,xmm7 ; xmm1=(-- 01 -- 03 -- 05 -- 07)
501 psrad xmm6,(WORD_BIT-CONST_BITS-2) ; xmm6=tmp10[col0 **** **** ****]
502 psrad xmm1,(WORD_BIT-CONST_BITS-2) ; xmm1=tmp10[col1 col3 col5 col7]
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000503
DRCe5eaf372014-05-09 18:00:32 +0000504 ; -- Final output stage
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000505
DRCe5eaf372014-05-09 18:00:32 +0000506 movdqa xmm3,xmm6
507 movdqa xmm5,xmm1
508 paddd xmm6,xmm4 ; xmm6=data0[col0 **** **** ****]=(A0 ** ** **)
509 paddd xmm1,xmm0 ; xmm1=data0[col1 col3 col5 col7]=(A1 A3 A5 A7)
510 psubd xmm3,xmm4 ; xmm3=data1[col0 **** **** ****]=(B0 ** ** **)
511 psubd xmm5,xmm0 ; xmm5=data1[col1 col3 col5 col7]=(B1 B3 B5 B7)
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000512
DRCe5eaf372014-05-09 18:00:32 +0000513 movdqa xmm2,[GOTOFF(ebx,PD_DESCALE_P1_2)] ; xmm2=[PD_DESCALE_P1_2]
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000514
DRCe5eaf372014-05-09 18:00:32 +0000515 punpckldq xmm6,xmm3 ; xmm6=(A0 B0 ** **)
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000516
DRCe5eaf372014-05-09 18:00:32 +0000517 movdqa xmm7,xmm1
518 punpcklqdq xmm1,xmm5 ; xmm1=(A1 A3 B1 B3)
519 punpckhqdq xmm7,xmm5 ; xmm7=(A5 A7 B5 B7)
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000520
DRCe5eaf372014-05-09 18:00:32 +0000521 paddd xmm6,xmm2
522 psrad xmm6,DESCALE_P1_2
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000523
DRCe5eaf372014-05-09 18:00:32 +0000524 paddd xmm1,xmm2
525 paddd xmm7,xmm2
526 psrad xmm1,DESCALE_P1_2
527 psrad xmm7,DESCALE_P1_2
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000528
DRCe5eaf372014-05-09 18:00:32 +0000529 ; -- Prefetch the next coefficient block
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000530
DRCe5eaf372014-05-09 18:00:32 +0000531 prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 0*32]
532 prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 1*32]
533 prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 2*32]
534 prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 3*32]
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000535
DRCe5eaf372014-05-09 18:00:32 +0000536 ; ---- Pass 2: process rows, store into output array.
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000537
DRCe5eaf372014-05-09 18:00:32 +0000538 mov edi, JSAMPARRAY [output_buf(ebp)] ; (JSAMPROW *)
539 mov eax, JDIMENSION [output_col(ebp)]
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000540
DRCe5eaf372014-05-09 18:00:32 +0000541 ; | input:| result:|
542 ; | A0 B0 | |
543 ; | A1 B1 | C0 C1 |
544 ; | A3 B3 | D0 D1 |
545 ; | A5 B5 | |
546 ; | A7 B7 | |
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000547
DRCe5eaf372014-05-09 18:00:32 +0000548 ; -- Odd part
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000549
DRCe5eaf372014-05-09 18:00:32 +0000550 packssdw xmm1,xmm1 ; xmm1=(A1 A3 B1 B3 A1 A3 B1 B3)
551 packssdw xmm7,xmm7 ; xmm7=(A5 A7 B5 B7 A5 A7 B5 B7)
552 pmaddwd xmm1,[GOTOFF(ebx,PW_F362_MF127)]
553 pmaddwd xmm7,[GOTOFF(ebx,PW_F085_MF072)]
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000554
DRCe5eaf372014-05-09 18:00:32 +0000555 paddd xmm1,xmm7 ; xmm1=tmp0[row0 row1 row0 row1]
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000556
DRCe5eaf372014-05-09 18:00:32 +0000557 ; -- Even part
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000558
DRCe5eaf372014-05-09 18:00:32 +0000559 pslld xmm6,(CONST_BITS+2) ; xmm6=tmp10[row0 row1 **** ****]
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000560
DRCe5eaf372014-05-09 18:00:32 +0000561 ; -- Final output stage
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000562
DRCe5eaf372014-05-09 18:00:32 +0000563 movdqa xmm4,xmm6
564 paddd xmm6,xmm1 ; xmm6=data0[row0 row1 **** ****]=(C0 C1 ** **)
565 psubd xmm4,xmm1 ; xmm4=data1[row0 row1 **** ****]=(D0 D1 ** **)
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000566
DRCe5eaf372014-05-09 18:00:32 +0000567 punpckldq xmm6,xmm4 ; xmm6=(C0 D0 C1 D1)
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000568
DRCe5eaf372014-05-09 18:00:32 +0000569 paddd xmm6,[GOTOFF(ebx,PD_DESCALE_P2_2)]
570 psrad xmm6,DESCALE_P2_2
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000571
DRCe5eaf372014-05-09 18:00:32 +0000572 packssdw xmm6,xmm6 ; xmm6=(C0 D0 C1 D1 C0 D0 C1 D1)
573 packsswb xmm6,xmm6 ; xmm6=(C0 D0 C1 D1 C0 D0 C1 D1 ..)
574 paddb xmm6,[GOTOFF(ebx,PB_CENTERJSAMP)]
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000575
DRCe5eaf372014-05-09 18:00:32 +0000576 pextrw ebx,xmm6,0x00 ; ebx=(C0 D0 -- --)
577 pextrw ecx,xmm6,0x01 ; ecx=(C1 D1 -- --)
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000578
DRCe5eaf372014-05-09 18:00:32 +0000579 mov edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW]
580 mov esi, JSAMPROW [edi+1*SIZEOF_JSAMPROW]
581 mov WORD [edx+eax*SIZEOF_JSAMPLE], bx
582 mov WORD [esi+eax*SIZEOF_JSAMPLE], cx
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000583
DRCe5eaf372014-05-09 18:00:32 +0000584 pop edi
585 pop esi
586; pop edx ; need not be preserved
587; pop ecx ; need not be preserved
588 pop ebx
589 pop ebp
590 ret
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000591
DRC132b5fd2009-10-08 09:04:56 +0000592; For some reason, the OS X linker does not honor the request to align the
593; segment unless we do this.
DRCe5eaf372014-05-09 18:00:32 +0000594 align 16