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gerrit.omnirom.org / android_external_tigervnc / 3e0e2de120d9d10245e26143a52cd0f49d16f413 / . / common / jpeg / simd / jfmmxfst.asm
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Pierre Ossman3e0e2de2009-03-09 13:25:30 +0000[diff] [blame^]1;
2; jfmmxfst.asm - fast integer FDCT (MMX)
3;
4; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
5;
6; Based on
7; 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 a fast, not so accurate integer implementation of
18; the forward DCT (Discrete Cosine Transform). The following code is
19; based directly on the IJG's original jfdctfst.c; see the jfdctfst.c
20; for more details.
21;
22; [TAB8]
23
24%include "simd/jsimdext.inc"
25%include "simd/jdct.inc"
26
27; --------------------------------------------------------------------------
28
29%define CONST_BITS 8 ; 14 is also OK.
30
31%if CONST_BITS == 8
32F_0_382 equ 98 ; FIX(0.382683433)
33F_0_541 equ 139 ; FIX(0.541196100)
34F_0_707 equ 181 ; FIX(0.707106781)
35F_1_306 equ 334 ; FIX(1.306562965)
36%else
37; NASM cannot do compile-time arithmetic on floating-point constants.
38%define DESCALE(x,n) (((x)+(1<<((n)-1)))>>(n))
39F_0_382 equ DESCALE( 410903207,30-CONST_BITS) ; FIX(0.382683433)
40F_0_541 equ DESCALE( 581104887,30-CONST_BITS) ; FIX(0.541196100)
41F_0_707 equ DESCALE( 759250124,30-CONST_BITS) ; FIX(0.707106781)
42F_1_306 equ DESCALE(1402911301,30-CONST_BITS) ; FIX(1.306562965)
43%endif
44
45; --------------------------------------------------------------------------
46 SECTION SEG_CONST
47
48; PRE_MULTIPLY_SCALE_BITS <= 2 (to avoid overflow)
49; CONST_BITS + CONST_SHIFT + PRE_MULTIPLY_SCALE_BITS == 16 (for pmulhw)
50
51%define PRE_MULTIPLY_SCALE_BITS 2
52%define CONST_SHIFT (16 - PRE_MULTIPLY_SCALE_BITS - CONST_BITS)
53
54 alignz 16
55 global EXTN(jconst_fdct_ifast_mmx)
56
57EXTN(jconst_fdct_ifast_mmx):
58
59PW_F0707 times 4 dw F_0_707 << CONST_SHIFT
60PW_F0382 times 4 dw F_0_382 << CONST_SHIFT
61PW_F0541 times 4 dw F_0_541 << CONST_SHIFT
62PW_F1306 times 4 dw F_1_306 << CONST_SHIFT
63
64 alignz 16
65
66; --------------------------------------------------------------------------
67 SECTION SEG_TEXT
68 BITS 32
69;
70; Perform the forward DCT on one block of samples.
71;
72; GLOBAL(void)
73; jsimd_fdct_ifast_mmx (DCTELEM * data)
74;
75
76%define data(b) (b)+8 ; DCTELEM * data
77
78%define original_ebp ebp+0
79%define wk(i) ebp-(WK_NUM-(i))*SIZEOF_MMWORD ; mmword wk[WK_NUM]
80%define WK_NUM 2
81
82 align 16
83 global EXTN(jsimd_fdct_ifast_mmx)
84
85EXTN(jsimd_fdct_ifast_mmx):
86 push ebp
87 mov eax,esp ; eax = original ebp
88 sub esp, byte 4
89 and esp, byte (-SIZEOF_MMWORD) ; align to 64 bits
90 mov [esp],eax
91 mov ebp,esp ; ebp = aligned ebp
92 lea esp, [wk(0)]
93 pushpic ebx
94; push ecx ; need not be preserved
95; push edx ; need not be preserved
96; push esi ; unused
97; push edi ; unused
98
99 get_GOT ebx ; get GOT address
100
101 ; ---- Pass 1: process rows.
102
103 mov edx, POINTER [data(eax)] ; (DCTELEM *)
104 mov ecx, DCTSIZE/4
105 alignx 16,7
106.rowloop:
107
108 movq mm0, MMWORD [MMBLOCK(2,0,edx,SIZEOF_DCTELEM)]
109 movq mm1, MMWORD [MMBLOCK(3,0,edx,SIZEOF_DCTELEM)]
110 movq mm2, MMWORD [MMBLOCK(2,1,edx,SIZEOF_DCTELEM)]
111 movq mm3, MMWORD [MMBLOCK(3,1,edx,SIZEOF_DCTELEM)]
112
113 ; mm0=(20 21 22 23), mm2=(24 25 26 27)
114 ; mm1=(30 31 32 33), mm3=(34 35 36 37)
115
116 movq mm4,mm0 ; transpose coefficients(phase 1)
117 punpcklwd mm0,mm1 ; mm0=(20 30 21 31)
118 punpckhwd mm4,mm1 ; mm4=(22 32 23 33)
119 movq mm5,mm2 ; transpose coefficients(phase 1)
120 punpcklwd mm2,mm3 ; mm2=(24 34 25 35)
121 punpckhwd mm5,mm3 ; mm5=(26 36 27 37)
122
123 movq mm6, MMWORD [MMBLOCK(0,0,edx,SIZEOF_DCTELEM)]
124 movq mm7, MMWORD [MMBLOCK(1,0,edx,SIZEOF_DCTELEM)]
125 movq mm1, MMWORD [MMBLOCK(0,1,edx,SIZEOF_DCTELEM)]
126 movq mm3, MMWORD [MMBLOCK(1,1,edx,SIZEOF_DCTELEM)]
127
128 ; mm6=(00 01 02 03), mm1=(04 05 06 07)
129 ; mm7=(10 11 12 13), mm3=(14 15 16 17)
130
131 movq MMWORD [wk(0)], mm4 ; wk(0)=(22 32 23 33)
132 movq MMWORD [wk(1)], mm2 ; wk(1)=(24 34 25 35)
133
134 movq mm4,mm6 ; transpose coefficients(phase 1)
135 punpcklwd mm6,mm7 ; mm6=(00 10 01 11)
136 punpckhwd mm4,mm7 ; mm4=(02 12 03 13)
137 movq mm2,mm1 ; transpose coefficients(phase 1)
138 punpcklwd mm1,mm3 ; mm1=(04 14 05 15)
139 punpckhwd mm2,mm3 ; mm2=(06 16 07 17)
140
141 movq mm7,mm6 ; transpose coefficients(phase 2)
142 punpckldq mm6,mm0 ; mm6=(00 10 20 30)=data0
143 punpckhdq mm7,mm0 ; mm7=(01 11 21 31)=data1
144 movq mm3,mm2 ; transpose coefficients(phase 2)
145 punpckldq mm2,mm5 ; mm2=(06 16 26 36)=data6
146 punpckhdq mm3,mm5 ; mm3=(07 17 27 37)=data7
147
148 movq mm0,mm7
149 movq mm5,mm6
150 psubw mm7,mm2 ; mm7=data1-data6=tmp6
151 psubw mm6,mm3 ; mm6=data0-data7=tmp7
152 paddw mm0,mm2 ; mm0=data1+data6=tmp1
153 paddw mm5,mm3 ; mm5=data0+data7=tmp0
154
155 movq mm2, MMWORD [wk(0)] ; mm2=(22 32 23 33)
156 movq mm3, MMWORD [wk(1)] ; mm3=(24 34 25 35)
157 movq MMWORD [wk(0)], mm7 ; wk(0)=tmp6
158 movq MMWORD [wk(1)], mm6 ; wk(1)=tmp7
159
160 movq mm7,mm4 ; transpose coefficients(phase 2)
161 punpckldq mm4,mm2 ; mm4=(02 12 22 32)=data2
162 punpckhdq mm7,mm2 ; mm7=(03 13 23 33)=data3
163 movq mm6,mm1 ; transpose coefficients(phase 2)
164 punpckldq mm1,mm3 ; mm1=(04 14 24 34)=data4
165 punpckhdq mm6,mm3 ; mm6=(05 15 25 35)=data5
166
167 movq mm2,mm7
168 movq mm3,mm4
169 paddw mm7,mm1 ; mm7=data3+data4=tmp3
170 paddw mm4,mm6 ; mm4=data2+data5=tmp2
171 psubw mm2,mm1 ; mm2=data3-data4=tmp4
172 psubw mm3,mm6 ; mm3=data2-data5=tmp5
173
174 ; -- Even part
175
176 movq mm1,mm5
177 movq mm6,mm0
178 psubw mm5,mm7 ; mm5=tmp13
179 psubw mm0,mm4 ; mm0=tmp12
180 paddw mm1,mm7 ; mm1=tmp10
181 paddw mm6,mm4 ; mm6=tmp11
182
183 paddw mm0,mm5
184 psllw mm0,PRE_MULTIPLY_SCALE_BITS
185 pmulhw mm0,[GOTOFF(ebx,PW_F0707)] ; mm0=z1
186
187 movq mm7,mm1
188 movq mm4,mm5
189 psubw mm1,mm6 ; mm1=data4
190 psubw mm5,mm0 ; mm5=data6
191 paddw mm7,mm6 ; mm7=data0
192 paddw mm4,mm0 ; mm4=data2
193
194 movq MMWORD [MMBLOCK(0,1,edx,SIZEOF_DCTELEM)], mm1
195 movq MMWORD [MMBLOCK(2,1,edx,SIZEOF_DCTELEM)], mm5
196 movq MMWORD [MMBLOCK(0,0,edx,SIZEOF_DCTELEM)], mm7
197 movq MMWORD [MMBLOCK(2,0,edx,SIZEOF_DCTELEM)], mm4
198
199 ; -- Odd part
200
201 movq mm6, MMWORD [wk(0)] ; mm6=tmp6
202 movq mm0, MMWORD [wk(1)] ; mm0=tmp7
203
204 paddw mm2,mm3 ; mm2=tmp10
205 paddw mm3,mm6 ; mm3=tmp11
206 paddw mm6,mm0 ; mm6=tmp12, mm0=tmp7
207
208 psllw mm2,PRE_MULTIPLY_SCALE_BITS
209 psllw mm6,PRE_MULTIPLY_SCALE_BITS
210
211 psllw mm3,PRE_MULTIPLY_SCALE_BITS
212 pmulhw mm3,[GOTOFF(ebx,PW_F0707)] ; mm3=z3
213
214 movq mm1,mm2 ; mm1=tmp10
215 psubw mm2,mm6
216 pmulhw mm2,[GOTOFF(ebx,PW_F0382)] ; mm2=z5
217 pmulhw mm1,[GOTOFF(ebx,PW_F0541)] ; mm1=MULTIPLY(tmp10,FIX_0_54119610)
218 pmulhw mm6,[GOTOFF(ebx,PW_F1306)] ; mm6=MULTIPLY(tmp12,FIX_1_30656296)
219 paddw mm1,mm2 ; mm1=z2
220 paddw mm6,mm2 ; mm6=z4
221
222 movq mm5,mm0
223 psubw mm0,mm3 ; mm0=z13
224 paddw mm5,mm3 ; mm5=z11
225
226 movq mm7,mm0
227 movq mm4,mm5
228 psubw mm0,mm1 ; mm0=data3
229 psubw mm5,mm6 ; mm5=data7
230 paddw mm7,mm1 ; mm7=data5
231 paddw mm4,mm6 ; mm4=data1
232
233 movq MMWORD [MMBLOCK(3,0,edx,SIZEOF_DCTELEM)], mm0
234 movq MMWORD [MMBLOCK(3,1,edx,SIZEOF_DCTELEM)], mm5
235 movq MMWORD [MMBLOCK(1,1,edx,SIZEOF_DCTELEM)], mm7
236 movq MMWORD [MMBLOCK(1,0,edx,SIZEOF_DCTELEM)], mm4
237
238 add edx, byte 4*DCTSIZE*SIZEOF_DCTELEM
239 dec ecx
240 jnz near .rowloop
241
242 ; ---- Pass 2: process columns.
243
244 mov edx, POINTER [data(eax)] ; (DCTELEM *)
245 mov ecx, DCTSIZE/4
246 alignx 16,7
247.columnloop:
248
249 movq mm0, MMWORD [MMBLOCK(2,0,edx,SIZEOF_DCTELEM)]
250 movq mm1, MMWORD [MMBLOCK(3,0,edx,SIZEOF_DCTELEM)]
251 movq mm2, MMWORD [MMBLOCK(6,0,edx,SIZEOF_DCTELEM)]
252 movq mm3, MMWORD [MMBLOCK(7,0,edx,SIZEOF_DCTELEM)]
253
254 ; mm0=(02 12 22 32), mm2=(42 52 62 72)
255 ; mm1=(03 13 23 33), mm3=(43 53 63 73)
256
257 movq mm4,mm0 ; transpose coefficients(phase 1)
258 punpcklwd mm0,mm1 ; mm0=(02 03 12 13)
259 punpckhwd mm4,mm1 ; mm4=(22 23 32 33)
260 movq mm5,mm2 ; transpose coefficients(phase 1)
261 punpcklwd mm2,mm3 ; mm2=(42 43 52 53)
262 punpckhwd mm5,mm3 ; mm5=(62 63 72 73)
263
264 movq mm6, MMWORD [MMBLOCK(0,0,edx,SIZEOF_DCTELEM)]
265 movq mm7, MMWORD [MMBLOCK(1,0,edx,SIZEOF_DCTELEM)]
266 movq mm1, MMWORD [MMBLOCK(4,0,edx,SIZEOF_DCTELEM)]
267 movq mm3, MMWORD [MMBLOCK(5,0,edx,SIZEOF_DCTELEM)]
268
269 ; mm6=(00 10 20 30), mm1=(40 50 60 70)
270 ; mm7=(01 11 21 31), mm3=(41 51 61 71)
271
272 movq MMWORD [wk(0)], mm4 ; wk(0)=(22 23 32 33)
273 movq MMWORD [wk(1)], mm2 ; wk(1)=(42 43 52 53)
274
275 movq mm4,mm6 ; transpose coefficients(phase 1)
276 punpcklwd mm6,mm7 ; mm6=(00 01 10 11)
277 punpckhwd mm4,mm7 ; mm4=(20 21 30 31)
278 movq mm2,mm1 ; transpose coefficients(phase 1)
279 punpcklwd mm1,mm3 ; mm1=(40 41 50 51)
280 punpckhwd mm2,mm3 ; mm2=(60 61 70 71)
281
282 movq mm7,mm6 ; transpose coefficients(phase 2)
283 punpckldq mm6,mm0 ; mm6=(00 01 02 03)=data0
284 punpckhdq mm7,mm0 ; mm7=(10 11 12 13)=data1
285 movq mm3,mm2 ; transpose coefficients(phase 2)
286 punpckldq mm2,mm5 ; mm2=(60 61 62 63)=data6
287 punpckhdq mm3,mm5 ; mm3=(70 71 72 73)=data7
288
289 movq mm0,mm7
290 movq mm5,mm6
291 psubw mm7,mm2 ; mm7=data1-data6=tmp6
292 psubw mm6,mm3 ; mm6=data0-data7=tmp7
293 paddw mm0,mm2 ; mm0=data1+data6=tmp1
294 paddw mm5,mm3 ; mm5=data0+data7=tmp0
295
296 movq mm2, MMWORD [wk(0)] ; mm2=(22 23 32 33)
297 movq mm3, MMWORD [wk(1)] ; mm3=(42 43 52 53)
298 movq MMWORD [wk(0)], mm7 ; wk(0)=tmp6
299 movq MMWORD [wk(1)], mm6 ; wk(1)=tmp7
300
301 movq mm7,mm4 ; transpose coefficients(phase 2)
302 punpckldq mm4,mm2 ; mm4=(20 21 22 23)=data2
303 punpckhdq mm7,mm2 ; mm7=(30 31 32 33)=data3
304 movq mm6,mm1 ; transpose coefficients(phase 2)
305 punpckldq mm1,mm3 ; mm1=(40 41 42 43)=data4
306 punpckhdq mm6,mm3 ; mm6=(50 51 52 53)=data5
307
308 movq mm2,mm7
309 movq mm3,mm4
310 paddw mm7,mm1 ; mm7=data3+data4=tmp3
311 paddw mm4,mm6 ; mm4=data2+data5=tmp2
312 psubw mm2,mm1 ; mm2=data3-data4=tmp4
313 psubw mm3,mm6 ; mm3=data2-data5=tmp5
314
315 ; -- Even part
316
317 movq mm1,mm5
318 movq mm6,mm0
319 psubw mm5,mm7 ; mm5=tmp13
320 psubw mm0,mm4 ; mm0=tmp12
321 paddw mm1,mm7 ; mm1=tmp10
322 paddw mm6,mm4 ; mm6=tmp11
323
324 paddw mm0,mm5
325 psllw mm0,PRE_MULTIPLY_SCALE_BITS
326 pmulhw mm0,[GOTOFF(ebx,PW_F0707)] ; mm0=z1
327
328 movq mm7,mm1
329 movq mm4,mm5
330 psubw mm1,mm6 ; mm1=data4
331 psubw mm5,mm0 ; mm5=data6
332 paddw mm7,mm6 ; mm7=data0
333 paddw mm4,mm0 ; mm4=data2
334
335 movq MMWORD [MMBLOCK(4,0,edx,SIZEOF_DCTELEM)], mm1
336 movq MMWORD [MMBLOCK(6,0,edx,SIZEOF_DCTELEM)], mm5
337 movq MMWORD [MMBLOCK(0,0,edx,SIZEOF_DCTELEM)], mm7
338 movq MMWORD [MMBLOCK(2,0,edx,SIZEOF_DCTELEM)], mm4
339
340 ; -- Odd part
341
342 movq mm6, MMWORD [wk(0)] ; mm6=tmp6
343 movq mm0, MMWORD [wk(1)] ; mm0=tmp7
344
345 paddw mm2,mm3 ; mm2=tmp10
346 paddw mm3,mm6 ; mm3=tmp11
347 paddw mm6,mm0 ; mm6=tmp12, mm0=tmp7
348
349 psllw mm2,PRE_MULTIPLY_SCALE_BITS
350 psllw mm6,PRE_MULTIPLY_SCALE_BITS
351
352 psllw mm3,PRE_MULTIPLY_SCALE_BITS
353 pmulhw mm3,[GOTOFF(ebx,PW_F0707)] ; mm3=z3
354
355 movq mm1,mm2 ; mm1=tmp10
356 psubw mm2,mm6
357 pmulhw mm2,[GOTOFF(ebx,PW_F0382)] ; mm2=z5
358 pmulhw mm1,[GOTOFF(ebx,PW_F0541)] ; mm1=MULTIPLY(tmp10,FIX_0_54119610)
359 pmulhw mm6,[GOTOFF(ebx,PW_F1306)] ; mm6=MULTIPLY(tmp12,FIX_1_30656296)
360 paddw mm1,mm2 ; mm1=z2
361 paddw mm6,mm2 ; mm6=z4
362
363 movq mm5,mm0
364 psubw mm0,mm3 ; mm0=z13
365 paddw mm5,mm3 ; mm5=z11
366
367 movq mm7,mm0
368 movq mm4,mm5
369 psubw mm0,mm1 ; mm0=data3
370 psubw mm5,mm6 ; mm5=data7
371 paddw mm7,mm1 ; mm7=data5
372 paddw mm4,mm6 ; mm4=data1
373
374 movq MMWORD [MMBLOCK(3,0,edx,SIZEOF_DCTELEM)], mm0
375 movq MMWORD [MMBLOCK(7,0,edx,SIZEOF_DCTELEM)], mm5
376 movq MMWORD [MMBLOCK(5,0,edx,SIZEOF_DCTELEM)], mm7
377 movq MMWORD [MMBLOCK(1,0,edx,SIZEOF_DCTELEM)], mm4
378
379 add edx, byte 4*SIZEOF_DCTELEM
380 dec ecx
381 jnz near .columnloop
382
383 emms ; empty MMX state
384
385; pop edi ; unused
386; pop esi ; unused
387; pop edx ; need not be preserved
388; pop ecx ; need not be preserved
389 poppic ebx
390 mov esp,ebp ; esp <- aligned ebp
391 pop esp ; esp <- original ebp
392 pop ebp
393 ret
394