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Andrew Top84143442018-07-12 10:44:23 -07001;
2; jfdctint.asm - accurate integer FDCT (SSE2)
3;
4; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
Kaido Kert0e7d6962021-08-06 13:16:46 -07005; Copyright (C) 2016, 2020, D. R. Commander.
Andrew Top84143442018-07-12 10:44:23 -07006;
7; Based on the 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;
Kaido Kert0e7d6962021-08-06 13:16:46 -070017; This file contains a slower but more accurate integer implementation of the
Andrew Top84143442018-07-12 10:44:23 -070018; forward DCT (Discrete Cosine Transform). The following code is based
19; directly on the IJG's original jfdctint.c; see the jfdctint.c for
20; more details.
Andrew Top84143442018-07-12 10:44:23 -070021
22%include "jsimdext.inc"
23%include "jdct.inc"
24
25; --------------------------------------------------------------------------
26
27%define CONST_BITS 13
28%define PASS1_BITS 2
29
30%define DESCALE_P1 (CONST_BITS - PASS1_BITS)
31%define DESCALE_P2 (CONST_BITS + PASS1_BITS)
32
33%if CONST_BITS == 13
34F_0_298 equ 2446 ; FIX(0.298631336)
35F_0_390 equ 3196 ; FIX(0.390180644)
36F_0_541 equ 4433 ; FIX(0.541196100)
37F_0_765 equ 6270 ; FIX(0.765366865)
38F_0_899 equ 7373 ; FIX(0.899976223)
39F_1_175 equ 9633 ; FIX(1.175875602)
40F_1_501 equ 12299 ; FIX(1.501321110)
41F_1_847 equ 15137 ; FIX(1.847759065)
42F_1_961 equ 16069 ; FIX(1.961570560)
43F_2_053 equ 16819 ; FIX(2.053119869)
44F_2_562 equ 20995 ; FIX(2.562915447)
45F_3_072 equ 25172 ; FIX(3.072711026)
46%else
47; NASM cannot do compile-time arithmetic on floating-point constants.
48%define DESCALE(x, n) (((x) + (1 << ((n) - 1))) >> (n))
49F_0_298 equ DESCALE( 320652955, 30 - CONST_BITS) ; FIX(0.298631336)
50F_0_390 equ DESCALE( 418953276, 30 - CONST_BITS) ; FIX(0.390180644)
51F_0_541 equ DESCALE( 581104887, 30 - CONST_BITS) ; FIX(0.541196100)
52F_0_765 equ DESCALE( 821806413, 30 - CONST_BITS) ; FIX(0.765366865)
53F_0_899 equ DESCALE( 966342111, 30 - CONST_BITS) ; FIX(0.899976223)
54F_1_175 equ DESCALE(1262586813, 30 - CONST_BITS) ; FIX(1.175875602)
55F_1_501 equ DESCALE(1612031267, 30 - CONST_BITS) ; FIX(1.501321110)
56F_1_847 equ DESCALE(1984016188, 30 - CONST_BITS) ; FIX(1.847759065)
57F_1_961 equ DESCALE(2106220350, 30 - CONST_BITS) ; FIX(1.961570560)
58F_2_053 equ DESCALE(2204520673, 30 - CONST_BITS) ; FIX(2.053119869)
59F_2_562 equ DESCALE(2751909506, 30 - CONST_BITS) ; FIX(2.562915447)
60F_3_072 equ DESCALE(3299298341, 30 - CONST_BITS) ; FIX(3.072711026)
61%endif
62
63; --------------------------------------------------------------------------
64 SECTION SEG_CONST
65
66 alignz 32
67 GLOBAL_DATA(jconst_fdct_islow_sse2)
68
69EXTN(jconst_fdct_islow_sse2):
70
71PW_F130_F054 times 4 dw (F_0_541 + F_0_765), F_0_541
72PW_F054_MF130 times 4 dw F_0_541, (F_0_541 - F_1_847)
73PW_MF078_F117 times 4 dw (F_1_175 - F_1_961), F_1_175
74PW_F117_F078 times 4 dw F_1_175, (F_1_175 - F_0_390)
75PW_MF060_MF089 times 4 dw (F_0_298 - F_0_899), -F_0_899
76PW_MF089_F060 times 4 dw -F_0_899, (F_1_501 - F_0_899)
77PW_MF050_MF256 times 4 dw (F_2_053 - F_2_562), -F_2_562
78PW_MF256_F050 times 4 dw -F_2_562, (F_3_072 - F_2_562)
79PD_DESCALE_P1 times 4 dd 1 << (DESCALE_P1 - 1)
80PD_DESCALE_P2 times 4 dd 1 << (DESCALE_P2 - 1)
81PW_DESCALE_P2X times 8 dw 1 << (PASS1_BITS - 1)
82
83 alignz 32
84
85; --------------------------------------------------------------------------
86 SECTION SEG_TEXT
87 BITS 32
88;
89; Perform the forward DCT on one block of samples.
90;
91; GLOBAL(void)
92; jsimd_fdct_islow_sse2(DCTELEM *data)
93;
94
95%define data(b) (b) + 8 ; DCTELEM *data
96
97%define original_ebp ebp + 0
98%define wk(i) ebp - (WK_NUM - (i)) * SIZEOF_XMMWORD
99 ; xmmword wk[WK_NUM]
100%define WK_NUM 6
101
102 align 32
103 GLOBAL_FUNCTION(jsimd_fdct_islow_sse2)
104
105EXTN(jsimd_fdct_islow_sse2):
106 push ebp
107 mov eax, esp ; eax = original ebp
108 sub esp, byte 4
109 and esp, byte (-SIZEOF_XMMWORD) ; align to 128 bits
110 mov [esp], eax
111 mov ebp, esp ; ebp = aligned ebp
112 lea esp, [wk(0)]
113 pushpic ebx
114; push ecx ; unused
115; push edx ; need not be preserved
116; push esi ; unused
117; push edi ; unused
118
119 get_GOT ebx ; get GOT address
120
121 ; ---- Pass 1: process rows.
122
123 mov edx, POINTER [data(eax)] ; (DCTELEM *)
124
125 movdqa xmm0, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_DCTELEM)]
126 movdqa xmm1, XMMWORD [XMMBLOCK(1,0,edx,SIZEOF_DCTELEM)]
127 movdqa xmm2, XMMWORD [XMMBLOCK(2,0,edx,SIZEOF_DCTELEM)]
128 movdqa xmm3, XMMWORD [XMMBLOCK(3,0,edx,SIZEOF_DCTELEM)]
129
130 ; xmm0=(00 01 02 03 04 05 06 07), xmm2=(20 21 22 23 24 25 26 27)
131 ; xmm1=(10 11 12 13 14 15 16 17), xmm3=(30 31 32 33 34 35 36 37)
132
133 movdqa xmm4, xmm0 ; transpose coefficients(phase 1)
134 punpcklwd xmm0, xmm1 ; xmm0=(00 10 01 11 02 12 03 13)
135 punpckhwd xmm4, xmm1 ; xmm4=(04 14 05 15 06 16 07 17)
136 movdqa xmm5, xmm2 ; transpose coefficients(phase 1)
137 punpcklwd xmm2, xmm3 ; xmm2=(20 30 21 31 22 32 23 33)
138 punpckhwd xmm5, xmm3 ; xmm5=(24 34 25 35 26 36 27 37)
139
140 movdqa xmm6, XMMWORD [XMMBLOCK(4,0,edx,SIZEOF_DCTELEM)]
141 movdqa xmm7, XMMWORD [XMMBLOCK(5,0,edx,SIZEOF_DCTELEM)]
142 movdqa xmm1, XMMWORD [XMMBLOCK(6,0,edx,SIZEOF_DCTELEM)]
143 movdqa xmm3, XMMWORD [XMMBLOCK(7,0,edx,SIZEOF_DCTELEM)]
144
145 ; xmm6=( 4 12 20 28 36 44 52 60), xmm1=( 6 14 22 30 38 46 54 62)
146 ; xmm7=( 5 13 21 29 37 45 53 61), xmm3=( 7 15 23 31 39 47 55 63)
147
148 movdqa XMMWORD [wk(0)], xmm2 ; wk(0)=(20 30 21 31 22 32 23 33)
149 movdqa XMMWORD [wk(1)], xmm5 ; wk(1)=(24 34 25 35 26 36 27 37)
150
151 movdqa xmm2, xmm6 ; transpose coefficients(phase 1)
152 punpcklwd xmm6, xmm7 ; xmm6=(40 50 41 51 42 52 43 53)
153 punpckhwd xmm2, xmm7 ; xmm2=(44 54 45 55 46 56 47 57)
154 movdqa xmm5, xmm1 ; transpose coefficients(phase 1)
155 punpcklwd xmm1, xmm3 ; xmm1=(60 70 61 71 62 72 63 73)
156 punpckhwd xmm5, xmm3 ; xmm5=(64 74 65 75 66 76 67 77)
157
158 movdqa xmm7, xmm6 ; transpose coefficients(phase 2)
159 punpckldq xmm6, xmm1 ; xmm6=(40 50 60 70 41 51 61 71)
160 punpckhdq xmm7, xmm1 ; xmm7=(42 52 62 72 43 53 63 73)
161 movdqa xmm3, xmm2 ; transpose coefficients(phase 2)
162 punpckldq xmm2, xmm5 ; xmm2=(44 54 64 74 45 55 65 75)
163 punpckhdq xmm3, xmm5 ; xmm3=(46 56 66 76 47 57 67 77)
164
165 movdqa xmm1, XMMWORD [wk(0)] ; xmm1=(20 30 21 31 22 32 23 33)
166 movdqa xmm5, XMMWORD [wk(1)] ; xmm5=(24 34 25 35 26 36 27 37)
167 movdqa XMMWORD [wk(2)], xmm7 ; wk(2)=(42 52 62 72 43 53 63 73)
168 movdqa XMMWORD [wk(3)], xmm2 ; wk(3)=(44 54 64 74 45 55 65 75)
169
170 movdqa xmm7, xmm0 ; transpose coefficients(phase 2)
171 punpckldq xmm0, xmm1 ; xmm0=(00 10 20 30 01 11 21 31)
172 punpckhdq xmm7, xmm1 ; xmm7=(02 12 22 32 03 13 23 33)
173 movdqa xmm2, xmm4 ; transpose coefficients(phase 2)
174 punpckldq xmm4, xmm5 ; xmm4=(04 14 24 34 05 15 25 35)
175 punpckhdq xmm2, xmm5 ; xmm2=(06 16 26 36 07 17 27 37)
176
177 movdqa xmm1, xmm0 ; transpose coefficients(phase 3)
178 punpcklqdq xmm0, xmm6 ; xmm0=(00 10 20 30 40 50 60 70)=data0
179 punpckhqdq xmm1, xmm6 ; xmm1=(01 11 21 31 41 51 61 71)=data1
180 movdqa xmm5, xmm2 ; transpose coefficients(phase 3)
181 punpcklqdq xmm2, xmm3 ; xmm2=(06 16 26 36 46 56 66 76)=data6
182 punpckhqdq xmm5, xmm3 ; xmm5=(07 17 27 37 47 57 67 77)=data7
183
184 movdqa xmm6, xmm1
185 movdqa xmm3, xmm0
186 psubw xmm1, xmm2 ; xmm1=data1-data6=tmp6
187 psubw xmm0, xmm5 ; xmm0=data0-data7=tmp7
188 paddw xmm6, xmm2 ; xmm6=data1+data6=tmp1
189 paddw xmm3, xmm5 ; xmm3=data0+data7=tmp0
190
191 movdqa xmm2, XMMWORD [wk(2)] ; xmm2=(42 52 62 72 43 53 63 73)
192 movdqa xmm5, XMMWORD [wk(3)] ; xmm5=(44 54 64 74 45 55 65 75)
193 movdqa XMMWORD [wk(0)], xmm1 ; wk(0)=tmp6
194 movdqa XMMWORD [wk(1)], xmm0 ; wk(1)=tmp7
195
196 movdqa xmm1, xmm7 ; transpose coefficients(phase 3)
197 punpcklqdq xmm7, xmm2 ; xmm7=(02 12 22 32 42 52 62 72)=data2
198 punpckhqdq xmm1, xmm2 ; xmm1=(03 13 23 33 43 53 63 73)=data3
199 movdqa xmm0, xmm4 ; transpose coefficients(phase 3)
200 punpcklqdq xmm4, xmm5 ; xmm4=(04 14 24 34 44 54 64 74)=data4
201 punpckhqdq xmm0, xmm5 ; xmm0=(05 15 25 35 45 55 65 75)=data5
202
203 movdqa xmm2, xmm1
204 movdqa xmm5, xmm7
205 paddw xmm1, xmm4 ; xmm1=data3+data4=tmp3
206 paddw xmm7, xmm0 ; xmm7=data2+data5=tmp2
207 psubw xmm2, xmm4 ; xmm2=data3-data4=tmp4
208 psubw xmm5, xmm0 ; xmm5=data2-data5=tmp5
209
210 ; -- Even part
211
212 movdqa xmm4, xmm3
213 movdqa xmm0, xmm6
214 paddw xmm3, xmm1 ; xmm3=tmp10
215 paddw xmm6, xmm7 ; xmm6=tmp11
216 psubw xmm4, xmm1 ; xmm4=tmp13
217 psubw xmm0, xmm7 ; xmm0=tmp12
218
219 movdqa xmm1, xmm3
220 paddw xmm3, xmm6 ; xmm3=tmp10+tmp11
221 psubw xmm1, xmm6 ; xmm1=tmp10-tmp11
222
223 psllw xmm3, PASS1_BITS ; xmm3=data0
224 psllw xmm1, PASS1_BITS ; xmm1=data4
225
226 movdqa XMMWORD [wk(2)], xmm3 ; wk(2)=data0
227 movdqa XMMWORD [wk(3)], xmm1 ; wk(3)=data4
228
229 ; (Original)
230 ; z1 = (tmp12 + tmp13) * 0.541196100;
231 ; data2 = z1 + tmp13 * 0.765366865;
232 ; data6 = z1 + tmp12 * -1.847759065;
233 ;
234 ; (This implementation)
235 ; data2 = tmp13 * (0.541196100 + 0.765366865) + tmp12 * 0.541196100;
236 ; data6 = tmp13 * 0.541196100 + tmp12 * (0.541196100 - 1.847759065);
237
238 movdqa xmm7, xmm4 ; xmm4=tmp13
239 movdqa xmm6, xmm4
240 punpcklwd xmm7, xmm0 ; xmm0=tmp12
241 punpckhwd xmm6, xmm0
242 movdqa xmm4, xmm7
243 movdqa xmm0, xmm6
244 pmaddwd xmm7, [GOTOFF(ebx,PW_F130_F054)] ; xmm7=data2L
245 pmaddwd xmm6, [GOTOFF(ebx,PW_F130_F054)] ; xmm6=data2H
246 pmaddwd xmm4, [GOTOFF(ebx,PW_F054_MF130)] ; xmm4=data6L
247 pmaddwd xmm0, [GOTOFF(ebx,PW_F054_MF130)] ; xmm0=data6H
248
249 paddd xmm7, [GOTOFF(ebx,PD_DESCALE_P1)]
250 paddd xmm6, [GOTOFF(ebx,PD_DESCALE_P1)]
251 psrad xmm7, DESCALE_P1
252 psrad xmm6, DESCALE_P1
253 paddd xmm4, [GOTOFF(ebx,PD_DESCALE_P1)]
254 paddd xmm0, [GOTOFF(ebx,PD_DESCALE_P1)]
255 psrad xmm4, DESCALE_P1
256 psrad xmm0, DESCALE_P1
257
258 packssdw xmm7, xmm6 ; xmm7=data2
259 packssdw xmm4, xmm0 ; xmm4=data6
260
261 movdqa XMMWORD [wk(4)], xmm7 ; wk(4)=data2
262 movdqa XMMWORD [wk(5)], xmm4 ; wk(5)=data6
263
264 ; -- Odd part
265
266 movdqa xmm3, XMMWORD [wk(0)] ; xmm3=tmp6
267 movdqa xmm1, XMMWORD [wk(1)] ; xmm1=tmp7
268
269 movdqa xmm6, xmm2 ; xmm2=tmp4
270 movdqa xmm0, xmm5 ; xmm5=tmp5
271 paddw xmm6, xmm3 ; xmm6=z3
272 paddw xmm0, xmm1 ; xmm0=z4
273
274 ; (Original)
275 ; z5 = (z3 + z4) * 1.175875602;
276 ; z3 = z3 * -1.961570560; z4 = z4 * -0.390180644;
277 ; z3 += z5; z4 += z5;
278 ;
279 ; (This implementation)
280 ; z3 = z3 * (1.175875602 - 1.961570560) + z4 * 1.175875602;
281 ; z4 = z3 * 1.175875602 + z4 * (1.175875602 - 0.390180644);
282
283 movdqa xmm7, xmm6
284 movdqa xmm4, xmm6
285 punpcklwd xmm7, xmm0
286 punpckhwd xmm4, xmm0
287 movdqa xmm6, xmm7
288 movdqa xmm0, xmm4
289 pmaddwd xmm7, [GOTOFF(ebx,PW_MF078_F117)] ; xmm7=z3L
290 pmaddwd xmm4, [GOTOFF(ebx,PW_MF078_F117)] ; xmm4=z3H
291 pmaddwd xmm6, [GOTOFF(ebx,PW_F117_F078)] ; xmm6=z4L
292 pmaddwd xmm0, [GOTOFF(ebx,PW_F117_F078)] ; xmm0=z4H
293
294 movdqa XMMWORD [wk(0)], xmm7 ; wk(0)=z3L
295 movdqa XMMWORD [wk(1)], xmm4 ; wk(1)=z3H
296
297 ; (Original)
298 ; z1 = tmp4 + tmp7; z2 = tmp5 + tmp6;
299 ; tmp4 = tmp4 * 0.298631336; tmp5 = tmp5 * 2.053119869;
300 ; tmp6 = tmp6 * 3.072711026; tmp7 = tmp7 * 1.501321110;
301 ; z1 = z1 * -0.899976223; z2 = z2 * -2.562915447;
302 ; data7 = tmp4 + z1 + z3; data5 = tmp5 + z2 + z4;
303 ; data3 = tmp6 + z2 + z3; data1 = tmp7 + z1 + z4;
304 ;
305 ; (This implementation)
306 ; tmp4 = tmp4 * (0.298631336 - 0.899976223) + tmp7 * -0.899976223;
307 ; tmp5 = tmp5 * (2.053119869 - 2.562915447) + tmp6 * -2.562915447;
308 ; tmp6 = tmp5 * -2.562915447 + tmp6 * (3.072711026 - 2.562915447);
309 ; tmp7 = tmp4 * -0.899976223 + tmp7 * (1.501321110 - 0.899976223);
310 ; data7 = tmp4 + z3; data5 = tmp5 + z4;
311 ; data3 = tmp6 + z3; data1 = tmp7 + z4;
312
313 movdqa xmm7, xmm2
314 movdqa xmm4, xmm2
315 punpcklwd xmm7, xmm1
316 punpckhwd xmm4, xmm1
317 movdqa xmm2, xmm7
318 movdqa xmm1, xmm4
319 pmaddwd xmm7, [GOTOFF(ebx,PW_MF060_MF089)] ; xmm7=tmp4L
320 pmaddwd xmm4, [GOTOFF(ebx,PW_MF060_MF089)] ; xmm4=tmp4H
321 pmaddwd xmm2, [GOTOFF(ebx,PW_MF089_F060)] ; xmm2=tmp7L
322 pmaddwd xmm1, [GOTOFF(ebx,PW_MF089_F060)] ; xmm1=tmp7H
323
324 paddd xmm7, XMMWORD [wk(0)] ; xmm7=data7L
325 paddd xmm4, XMMWORD [wk(1)] ; xmm4=data7H
326 paddd xmm2, xmm6 ; xmm2=data1L
327 paddd xmm1, xmm0 ; xmm1=data1H
328
329 paddd xmm7, [GOTOFF(ebx,PD_DESCALE_P1)]
330 paddd xmm4, [GOTOFF(ebx,PD_DESCALE_P1)]
331 psrad xmm7, DESCALE_P1
332 psrad xmm4, DESCALE_P1
333 paddd xmm2, [GOTOFF(ebx,PD_DESCALE_P1)]
334 paddd xmm1, [GOTOFF(ebx,PD_DESCALE_P1)]
335 psrad xmm2, DESCALE_P1
336 psrad xmm1, DESCALE_P1
337
338 packssdw xmm7, xmm4 ; xmm7=data7
339 packssdw xmm2, xmm1 ; xmm2=data1
340
341 movdqa xmm4, xmm5
342 movdqa xmm1, xmm5
343 punpcklwd xmm4, xmm3
344 punpckhwd xmm1, xmm3
345 movdqa xmm5, xmm4
346 movdqa xmm3, xmm1
347 pmaddwd xmm4, [GOTOFF(ebx,PW_MF050_MF256)] ; xmm4=tmp5L
348 pmaddwd xmm1, [GOTOFF(ebx,PW_MF050_MF256)] ; xmm1=tmp5H
349 pmaddwd xmm5, [GOTOFF(ebx,PW_MF256_F050)] ; xmm5=tmp6L
350 pmaddwd xmm3, [GOTOFF(ebx,PW_MF256_F050)] ; xmm3=tmp6H
351
352 paddd xmm4, xmm6 ; xmm4=data5L
353 paddd xmm1, xmm0 ; xmm1=data5H
354 paddd xmm5, XMMWORD [wk(0)] ; xmm5=data3L
355 paddd xmm3, XMMWORD [wk(1)] ; xmm3=data3H
356
357 paddd xmm4, [GOTOFF(ebx,PD_DESCALE_P1)]
358 paddd xmm1, [GOTOFF(ebx,PD_DESCALE_P1)]
359 psrad xmm4, DESCALE_P1
360 psrad xmm1, DESCALE_P1
361 paddd xmm5, [GOTOFF(ebx,PD_DESCALE_P1)]
362 paddd xmm3, [GOTOFF(ebx,PD_DESCALE_P1)]
363 psrad xmm5, DESCALE_P1
364 psrad xmm3, DESCALE_P1
365
366 packssdw xmm4, xmm1 ; xmm4=data5
367 packssdw xmm5, xmm3 ; xmm5=data3
368
369 ; ---- Pass 2: process columns.
370
371; mov edx, POINTER [data(eax)] ; (DCTELEM *)
372
373 movdqa xmm6, XMMWORD [wk(2)] ; xmm6=col0
374 movdqa xmm0, XMMWORD [wk(4)] ; xmm0=col2
375
376 ; xmm6=(00 10 20 30 40 50 60 70), xmm0=(02 12 22 32 42 52 62 72)
377 ; xmm2=(01 11 21 31 41 51 61 71), xmm5=(03 13 23 33 43 53 63 73)
378
379 movdqa xmm1, xmm6 ; transpose coefficients(phase 1)
380 punpcklwd xmm6, xmm2 ; xmm6=(00 01 10 11 20 21 30 31)
381 punpckhwd xmm1, xmm2 ; xmm1=(40 41 50 51 60 61 70 71)
382 movdqa xmm3, xmm0 ; transpose coefficients(phase 1)
383 punpcklwd xmm0, xmm5 ; xmm0=(02 03 12 13 22 23 32 33)
384 punpckhwd xmm3, xmm5 ; xmm3=(42 43 52 53 62 63 72 73)
385
386 movdqa xmm2, XMMWORD [wk(3)] ; xmm2=col4
387 movdqa xmm5, XMMWORD [wk(5)] ; xmm5=col6
388
389 ; xmm2=(04 14 24 34 44 54 64 74), xmm5=(06 16 26 36 46 56 66 76)
390 ; xmm4=(05 15 25 35 45 55 65 75), xmm7=(07 17 27 37 47 57 67 77)
391
392 movdqa XMMWORD [wk(0)], xmm0 ; wk(0)=(02 03 12 13 22 23 32 33)
393 movdqa XMMWORD [wk(1)], xmm3 ; wk(1)=(42 43 52 53 62 63 72 73)
394
395 movdqa xmm0, xmm2 ; transpose coefficients(phase 1)
396 punpcklwd xmm2, xmm4 ; xmm2=(04 05 14 15 24 25 34 35)
397 punpckhwd xmm0, xmm4 ; xmm0=(44 45 54 55 64 65 74 75)
398 movdqa xmm3, xmm5 ; transpose coefficients(phase 1)
399 punpcklwd xmm5, xmm7 ; xmm5=(06 07 16 17 26 27 36 37)
400 punpckhwd xmm3, xmm7 ; xmm3=(46 47 56 57 66 67 76 77)
401
402 movdqa xmm4, xmm2 ; transpose coefficients(phase 2)
403 punpckldq xmm2, xmm5 ; xmm2=(04 05 06 07 14 15 16 17)
404 punpckhdq xmm4, xmm5 ; xmm4=(24 25 26 27 34 35 36 37)
405 movdqa xmm7, xmm0 ; transpose coefficients(phase 2)
406 punpckldq xmm0, xmm3 ; xmm0=(44 45 46 47 54 55 56 57)
407 punpckhdq xmm7, xmm3 ; xmm7=(64 65 66 67 74 75 76 77)
408
409 movdqa xmm5, XMMWORD [wk(0)] ; xmm5=(02 03 12 13 22 23 32 33)
410 movdqa xmm3, XMMWORD [wk(1)] ; xmm3=(42 43 52 53 62 63 72 73)
411 movdqa XMMWORD [wk(2)], xmm4 ; wk(2)=(24 25 26 27 34 35 36 37)
412 movdqa XMMWORD [wk(3)], xmm0 ; wk(3)=(44 45 46 47 54 55 56 57)
413
414 movdqa xmm4, xmm6 ; transpose coefficients(phase 2)
415 punpckldq xmm6, xmm5 ; xmm6=(00 01 02 03 10 11 12 13)
416 punpckhdq xmm4, xmm5 ; xmm4=(20 21 22 23 30 31 32 33)
417 movdqa xmm0, xmm1 ; transpose coefficients(phase 2)
418 punpckldq xmm1, xmm3 ; xmm1=(40 41 42 43 50 51 52 53)
419 punpckhdq xmm0, xmm3 ; xmm0=(60 61 62 63 70 71 72 73)
420
421 movdqa xmm5, xmm6 ; transpose coefficients(phase 3)
422 punpcklqdq xmm6, xmm2 ; xmm6=(00 01 02 03 04 05 06 07)=data0
423 punpckhqdq xmm5, xmm2 ; xmm5=(10 11 12 13 14 15 16 17)=data1
424 movdqa xmm3, xmm0 ; transpose coefficients(phase 3)
425 punpcklqdq xmm0, xmm7 ; xmm0=(60 61 62 63 64 65 66 67)=data6
426 punpckhqdq xmm3, xmm7 ; xmm3=(70 71 72 73 74 75 76 77)=data7
427
428 movdqa xmm2, xmm5
429 movdqa xmm7, xmm6
430 psubw xmm5, xmm0 ; xmm5=data1-data6=tmp6
431 psubw xmm6, xmm3 ; xmm6=data0-data7=tmp7
432 paddw xmm2, xmm0 ; xmm2=data1+data6=tmp1
433 paddw xmm7, xmm3 ; xmm7=data0+data7=tmp0
434
435 movdqa xmm0, XMMWORD [wk(2)] ; xmm0=(24 25 26 27 34 35 36 37)
436 movdqa xmm3, XMMWORD [wk(3)] ; xmm3=(44 45 46 47 54 55 56 57)
437 movdqa XMMWORD [wk(0)], xmm5 ; wk(0)=tmp6
438 movdqa XMMWORD [wk(1)], xmm6 ; wk(1)=tmp7
439
440 movdqa xmm5, xmm4 ; transpose coefficients(phase 3)
441 punpcklqdq xmm4, xmm0 ; xmm4=(20 21 22 23 24 25 26 27)=data2
442 punpckhqdq xmm5, xmm0 ; xmm5=(30 31 32 33 34 35 36 37)=data3
443 movdqa xmm6, xmm1 ; transpose coefficients(phase 3)
444 punpcklqdq xmm1, xmm3 ; xmm1=(40 41 42 43 44 45 46 47)=data4
445 punpckhqdq xmm6, xmm3 ; xmm6=(50 51 52 53 54 55 56 57)=data5
446
447 movdqa xmm0, xmm5
448 movdqa xmm3, xmm4
449 paddw xmm5, xmm1 ; xmm5=data3+data4=tmp3
450 paddw xmm4, xmm6 ; xmm4=data2+data5=tmp2
451 psubw xmm0, xmm1 ; xmm0=data3-data4=tmp4
452 psubw xmm3, xmm6 ; xmm3=data2-data5=tmp5
453
454 ; -- Even part
455
456 movdqa xmm1, xmm7
457 movdqa xmm6, xmm2
458 paddw xmm7, xmm5 ; xmm7=tmp10
459 paddw xmm2, xmm4 ; xmm2=tmp11
460 psubw xmm1, xmm5 ; xmm1=tmp13
461 psubw xmm6, xmm4 ; xmm6=tmp12
462
463 movdqa xmm5, xmm7
464 paddw xmm7, xmm2 ; xmm7=tmp10+tmp11
465 psubw xmm5, xmm2 ; xmm5=tmp10-tmp11
466
467 paddw xmm7, [GOTOFF(ebx,PW_DESCALE_P2X)]
468 paddw xmm5, [GOTOFF(ebx,PW_DESCALE_P2X)]
469 psraw xmm7, PASS1_BITS ; xmm7=data0
470 psraw xmm5, PASS1_BITS ; xmm5=data4
471
472 movdqa XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_DCTELEM)], xmm7
473 movdqa XMMWORD [XMMBLOCK(4,0,edx,SIZEOF_DCTELEM)], xmm5
474
475 ; (Original)
476 ; z1 = (tmp12 + tmp13) * 0.541196100;
477 ; data2 = z1 + tmp13 * 0.765366865;
478 ; data6 = z1 + tmp12 * -1.847759065;
479 ;
480 ; (This implementation)
481 ; data2 = tmp13 * (0.541196100 + 0.765366865) + tmp12 * 0.541196100;
482 ; data6 = tmp13 * 0.541196100 + tmp12 * (0.541196100 - 1.847759065);
483
484 movdqa xmm4, xmm1 ; xmm1=tmp13
485 movdqa xmm2, xmm1
486 punpcklwd xmm4, xmm6 ; xmm6=tmp12
487 punpckhwd xmm2, xmm6
488 movdqa xmm1, xmm4
489 movdqa xmm6, xmm2
490 pmaddwd xmm4, [GOTOFF(ebx,PW_F130_F054)] ; xmm4=data2L
491 pmaddwd xmm2, [GOTOFF(ebx,PW_F130_F054)] ; xmm2=data2H
492 pmaddwd xmm1, [GOTOFF(ebx,PW_F054_MF130)] ; xmm1=data6L
493 pmaddwd xmm6, [GOTOFF(ebx,PW_F054_MF130)] ; xmm6=data6H
494
495 paddd xmm4, [GOTOFF(ebx,PD_DESCALE_P2)]
496 paddd xmm2, [GOTOFF(ebx,PD_DESCALE_P2)]
497 psrad xmm4, DESCALE_P2
498 psrad xmm2, DESCALE_P2
499 paddd xmm1, [GOTOFF(ebx,PD_DESCALE_P2)]
500 paddd xmm6, [GOTOFF(ebx,PD_DESCALE_P2)]
501 psrad xmm1, DESCALE_P2
502 psrad xmm6, DESCALE_P2
503
504 packssdw xmm4, xmm2 ; xmm4=data2
505 packssdw xmm1, xmm6 ; xmm1=data6
506
507 movdqa XMMWORD [XMMBLOCK(2,0,edx,SIZEOF_DCTELEM)], xmm4
508 movdqa XMMWORD [XMMBLOCK(6,0,edx,SIZEOF_DCTELEM)], xmm1
509
510 ; -- Odd part
511
512 movdqa xmm7, XMMWORD [wk(0)] ; xmm7=tmp6
513 movdqa xmm5, XMMWORD [wk(1)] ; xmm5=tmp7
514
515 movdqa xmm2, xmm0 ; xmm0=tmp4
516 movdqa xmm6, xmm3 ; xmm3=tmp5
517 paddw xmm2, xmm7 ; xmm2=z3
518 paddw xmm6, xmm5 ; xmm6=z4
519
520 ; (Original)
521 ; z5 = (z3 + z4) * 1.175875602;
522 ; z3 = z3 * -1.961570560; z4 = z4 * -0.390180644;
523 ; z3 += z5; z4 += z5;
524 ;
525 ; (This implementation)
526 ; z3 = z3 * (1.175875602 - 1.961570560) + z4 * 1.175875602;
527 ; z4 = z3 * 1.175875602 + z4 * (1.175875602 - 0.390180644);
528
529 movdqa xmm4, xmm2
530 movdqa xmm1, xmm2
531 punpcklwd xmm4, xmm6
532 punpckhwd xmm1, xmm6
533 movdqa xmm2, xmm4
534 movdqa xmm6, xmm1
535 pmaddwd xmm4, [GOTOFF(ebx,PW_MF078_F117)] ; xmm4=z3L
536 pmaddwd xmm1, [GOTOFF(ebx,PW_MF078_F117)] ; xmm1=z3H
537 pmaddwd xmm2, [GOTOFF(ebx,PW_F117_F078)] ; xmm2=z4L
538 pmaddwd xmm6, [GOTOFF(ebx,PW_F117_F078)] ; xmm6=z4H
539
540 movdqa XMMWORD [wk(0)], xmm4 ; wk(0)=z3L
541 movdqa XMMWORD [wk(1)], xmm1 ; wk(1)=z3H
542
543 ; (Original)
544 ; z1 = tmp4 + tmp7; z2 = tmp5 + tmp6;
545 ; tmp4 = tmp4 * 0.298631336; tmp5 = tmp5 * 2.053119869;
546 ; tmp6 = tmp6 * 3.072711026; tmp7 = tmp7 * 1.501321110;
547 ; z1 = z1 * -0.899976223; z2 = z2 * -2.562915447;
548 ; data7 = tmp4 + z1 + z3; data5 = tmp5 + z2 + z4;
549 ; data3 = tmp6 + z2 + z3; data1 = tmp7 + z1 + z4;
550 ;
551 ; (This implementation)
552 ; tmp4 = tmp4 * (0.298631336 - 0.899976223) + tmp7 * -0.899976223;
553 ; tmp5 = tmp5 * (2.053119869 - 2.562915447) + tmp6 * -2.562915447;
554 ; tmp6 = tmp5 * -2.562915447 + tmp6 * (3.072711026 - 2.562915447);
555 ; tmp7 = tmp4 * -0.899976223 + tmp7 * (1.501321110 - 0.899976223);
556 ; data7 = tmp4 + z3; data5 = tmp5 + z4;
557 ; data3 = tmp6 + z3; data1 = tmp7 + z4;
558
559 movdqa xmm4, xmm0
560 movdqa xmm1, xmm0
561 punpcklwd xmm4, xmm5
562 punpckhwd xmm1, xmm5
563 movdqa xmm0, xmm4
564 movdqa xmm5, xmm1
565 pmaddwd xmm4, [GOTOFF(ebx,PW_MF060_MF089)] ; xmm4=tmp4L
566 pmaddwd xmm1, [GOTOFF(ebx,PW_MF060_MF089)] ; xmm1=tmp4H
567 pmaddwd xmm0, [GOTOFF(ebx,PW_MF089_F060)] ; xmm0=tmp7L
568 pmaddwd xmm5, [GOTOFF(ebx,PW_MF089_F060)] ; xmm5=tmp7H
569
570 paddd xmm4, XMMWORD [wk(0)] ; xmm4=data7L
571 paddd xmm1, XMMWORD [wk(1)] ; xmm1=data7H
572 paddd xmm0, xmm2 ; xmm0=data1L
573 paddd xmm5, xmm6 ; xmm5=data1H
574
575 paddd xmm4, [GOTOFF(ebx,PD_DESCALE_P2)]
576 paddd xmm1, [GOTOFF(ebx,PD_DESCALE_P2)]
577 psrad xmm4, DESCALE_P2
578 psrad xmm1, DESCALE_P2
579 paddd xmm0, [GOTOFF(ebx,PD_DESCALE_P2)]
580 paddd xmm5, [GOTOFF(ebx,PD_DESCALE_P2)]
581 psrad xmm0, DESCALE_P2
582 psrad xmm5, DESCALE_P2
583
584 packssdw xmm4, xmm1 ; xmm4=data7
585 packssdw xmm0, xmm5 ; xmm0=data1
586
587 movdqa XMMWORD [XMMBLOCK(7,0,edx,SIZEOF_DCTELEM)], xmm4
588 movdqa XMMWORD [XMMBLOCK(1,0,edx,SIZEOF_DCTELEM)], xmm0
589
590 movdqa xmm1, xmm3
591 movdqa xmm5, xmm3
592 punpcklwd xmm1, xmm7
593 punpckhwd xmm5, xmm7
594 movdqa xmm3, xmm1
595 movdqa xmm7, xmm5
596 pmaddwd xmm1, [GOTOFF(ebx,PW_MF050_MF256)] ; xmm1=tmp5L
597 pmaddwd xmm5, [GOTOFF(ebx,PW_MF050_MF256)] ; xmm5=tmp5H
598 pmaddwd xmm3, [GOTOFF(ebx,PW_MF256_F050)] ; xmm3=tmp6L
599 pmaddwd xmm7, [GOTOFF(ebx,PW_MF256_F050)] ; xmm7=tmp6H
600
601 paddd xmm1, xmm2 ; xmm1=data5L
602 paddd xmm5, xmm6 ; xmm5=data5H
603 paddd xmm3, XMMWORD [wk(0)] ; xmm3=data3L
604 paddd xmm7, XMMWORD [wk(1)] ; xmm7=data3H
605
606 paddd xmm1, [GOTOFF(ebx,PD_DESCALE_P2)]
607 paddd xmm5, [GOTOFF(ebx,PD_DESCALE_P2)]
608 psrad xmm1, DESCALE_P2
609 psrad xmm5, DESCALE_P2
610 paddd xmm3, [GOTOFF(ebx,PD_DESCALE_P2)]
611 paddd xmm7, [GOTOFF(ebx,PD_DESCALE_P2)]
612 psrad xmm3, DESCALE_P2
613 psrad xmm7, DESCALE_P2
614
615 packssdw xmm1, xmm5 ; xmm1=data5
616 packssdw xmm3, xmm7 ; xmm3=data3
617
618 movdqa XMMWORD [XMMBLOCK(5,0,edx,SIZEOF_DCTELEM)], xmm1
619 movdqa XMMWORD [XMMBLOCK(3,0,edx,SIZEOF_DCTELEM)], xmm3
620
621; pop edi ; unused
622; pop esi ; unused
623; pop edx ; need not be preserved
624; pop ecx ; unused
625 poppic ebx
626 mov esp, ebp ; esp <- aligned ebp
627 pop esp ; esp <- original ebp
628 pop ebp
629 ret
630
631; For some reason, the OS X linker does not honor the request to align the
632; segment unless we do this.
633 align 32