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gerrit-public.fairphone.software / platform / external / libjpeg-turbo / 94f0e03f9072b070301475f732dbe3018578bd7f / . / simd / ji3dnflt.asm
blob: dc2076f412ad574f8e53a09de87aaaf2d211c6b4 [file] [log] [blame]
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]1;
2; ji3dnflt.asm - floating-point IDCT (3DNow! & MMX)
3;
Pierre Ossman65d03172009-03-09 13:28:10 +0000[diff] [blame]4; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
5;
6; Based on
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]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 floating-point implementation of the inverse DCT
18; (Discrete Cosine Transform). The following code is based directly on
19; the IJG's original jidctflt.c; see the jidctflt.c for more details.
20;
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]21; [TAB8]
22
Pierre Ossman3a65ef42009-03-16 13:34:18 +0000[diff] [blame]23%include "jsimdext.inc"
24%include "jdct.inc"
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]25
26; --------------------------------------------------------------------------
27 SECTION SEG_CONST
28
29 alignz 16
30 global EXTN(jconst_idct_float_3dnow)
31
32EXTN(jconst_idct_float_3dnow):
33
34PD_1_414 times 2 dd 1.414213562373095048801689
35PD_1_847 times 2 dd 1.847759065022573512256366
36PD_1_082 times 2 dd 1.082392200292393968799446
37PD_2_613 times 2 dd 2.613125929752753055713286
38PD_RNDINT_MAGIC times 2 dd 100663296.0 ; (float)(0x00C00000 << 3)
39PB_CENTERJSAMP times 8 db CENTERJSAMPLE
40
41 alignz 16
42
43; --------------------------------------------------------------------------
44 SECTION SEG_TEXT
45 BITS 32
46;
47; Perform dequantization and inverse DCT on one block of coefficients.
48;
49; GLOBAL(void)
Pierre Ossman65d03172009-03-09 13:28:10 +0000[diff] [blame]50; jsimd_idct_float_3dnow (void * dct_table, JCOEFPTR coef_block,
51; JSAMPARRAY output_buf, JDIMENSION output_col)
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]52;
53
Pierre Ossman65d03172009-03-09 13:28:10 +0000[diff] [blame]54%define dct_table(b) (b)+8 ; void * dct_table
55%define coef_block(b) (b)+12 ; JCOEFPTR coef_block
56%define output_buf(b) (b)+16 ; JSAMPARRAY output_buf
57%define output_col(b) (b)+20 ; JDIMENSION output_col
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]58
59%define original_ebp ebp+0
60%define wk(i) ebp-(WK_NUM-(i))*SIZEOF_MMWORD ; mmword wk[WK_NUM]
61%define WK_NUM 2
62%define workspace wk(0)-DCTSIZE2*SIZEOF_FAST_FLOAT
63 ; FAST_FLOAT workspace[DCTSIZE2]
64
65 align 16
Pierre Ossman65d03172009-03-09 13:28:10 +0000[diff] [blame]66 global EXTN(jsimd_idct_float_3dnow)
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]67
Pierre Ossman65d03172009-03-09 13:28:10 +0000[diff] [blame]68EXTN(jsimd_idct_float_3dnow):
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]69 push ebp
70 mov eax,esp ; eax = original ebp
71 sub esp, byte 4
72 and esp, byte (-SIZEOF_MMWORD) ; align to 64 bits
73 mov [esp],eax
74 mov ebp,esp ; ebp = aligned ebp
75 lea esp, [workspace]
76 push ebx
77; push ecx ; need not be preserved
78; push edx ; need not be preserved
79 push esi
80 push edi
81
82 get_GOT ebx ; get GOT address
83
84 ; ---- Pass 1: process columns from input, store into work array.
85
86; mov eax, [original_ebp]
Pierre Ossman65d03172009-03-09 13:28:10 +0000[diff] [blame]87 mov edx, POINTER [dct_table(eax)] ; quantptr
MIYASAKA Masarua2e6a9d2006-02-04 00:00:00 +0000[diff] [blame]88 mov esi, JCOEFPTR [coef_block(eax)] ; inptr
89 lea edi, [workspace] ; FAST_FLOAT * wsptr
90 mov ecx, DCTSIZE/2 ; ctr
91 alignx 16,7
92.columnloop:
93%ifndef NO_ZERO_COLUMN_TEST_FLOAT_3DNOW
94 mov eax, DWORD [DWBLOCK(1,0,esi,SIZEOF_JCOEF)]
95 or eax, DWORD [DWBLOCK(2,0,esi,SIZEOF_JCOEF)]
96 jnz short .columnDCT
97
98 pushpic ebx ; save GOT address
99 mov ebx, DWORD [DWBLOCK(3,0,esi,SIZEOF_JCOEF)]
100 mov eax, DWORD [DWBLOCK(4,0,esi,SIZEOF_JCOEF)]
101 or ebx, DWORD [DWBLOCK(5,0,esi,SIZEOF_JCOEF)]
102 or eax, DWORD [DWBLOCK(6,0,esi,SIZEOF_JCOEF)]
103 or ebx, DWORD [DWBLOCK(7,0,esi,SIZEOF_JCOEF)]
104 or eax,ebx
105 poppic ebx ; restore GOT address
106 jnz short .columnDCT
107
108 ; -- AC terms all zero
109
110 movd mm0, DWORD [DWBLOCK(0,0,esi,SIZEOF_JCOEF)]
111
112 punpcklwd mm0,mm0
113 psrad mm0,(DWORD_BIT-WORD_BIT)
114 pi2fd mm0,mm0
115
116 pfmul mm0, MMWORD [MMBLOCK(0,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
117
118 movq mm1,mm0
119 punpckldq mm0,mm0
120 punpckhdq mm1,mm1
121
122 movq MMWORD [MMBLOCK(0,0,edi,SIZEOF_FAST_FLOAT)], mm0
123 movq MMWORD [MMBLOCK(0,1,edi,SIZEOF_FAST_FLOAT)], mm0
124 movq MMWORD [MMBLOCK(0,2,edi,SIZEOF_FAST_FLOAT)], mm0
125 movq MMWORD [MMBLOCK(0,3,edi,SIZEOF_FAST_FLOAT)], mm0
126 movq MMWORD [MMBLOCK(1,0,edi,SIZEOF_FAST_FLOAT)], mm1
127 movq MMWORD [MMBLOCK(1,1,edi,SIZEOF_FAST_FLOAT)], mm1
128 movq MMWORD [MMBLOCK(1,2,edi,SIZEOF_FAST_FLOAT)], mm1
129 movq MMWORD [MMBLOCK(1,3,edi,SIZEOF_FAST_FLOAT)], mm1
130 jmp near .nextcolumn
131 alignx 16,7
132%endif
133.columnDCT:
134
135 ; -- Even part
136
137 movd mm0, DWORD [DWBLOCK(0,0,esi,SIZEOF_JCOEF)]
138 movd mm1, DWORD [DWBLOCK(2,0,esi,SIZEOF_JCOEF)]
139 movd mm2, DWORD [DWBLOCK(4,0,esi,SIZEOF_JCOEF)]
140 movd mm3, DWORD [DWBLOCK(6,0,esi,SIZEOF_JCOEF)]
141
142 punpcklwd mm0,mm0
143 punpcklwd mm1,mm1
144 psrad mm0,(DWORD_BIT-WORD_BIT)
145 psrad mm1,(DWORD_BIT-WORD_BIT)
146 pi2fd mm0,mm0
147 pi2fd mm1,mm1
148
149 pfmul mm0, MMWORD [MMBLOCK(0,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
150 pfmul mm1, MMWORD [MMBLOCK(2,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
151
152 punpcklwd mm2,mm2
153 punpcklwd mm3,mm3
154 psrad mm2,(DWORD_BIT-WORD_BIT)
155 psrad mm3,(DWORD_BIT-WORD_BIT)
156 pi2fd mm2,mm2
157 pi2fd mm3,mm3
158
159 pfmul mm2, MMWORD [MMBLOCK(4,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
160 pfmul mm3, MMWORD [MMBLOCK(6,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
161
162 movq mm4,mm0
163 movq mm5,mm1
164 pfsub mm0,mm2 ; mm0=tmp11
165 pfsub mm1,mm3
166 pfadd mm4,mm2 ; mm4=tmp10
167 pfadd mm5,mm3 ; mm5=tmp13
168
169 pfmul mm1,[GOTOFF(ebx,PD_1_414)]
170 pfsub mm1,mm5 ; mm1=tmp12
171
172 movq mm6,mm4
173 movq mm7,mm0
174 pfsub mm4,mm5 ; mm4=tmp3
175 pfsub mm0,mm1 ; mm0=tmp2
176 pfadd mm6,mm5 ; mm6=tmp0
177 pfadd mm7,mm1 ; mm7=tmp1
178
179 movq MMWORD [wk(1)], mm4 ; tmp3
180 movq MMWORD [wk(0)], mm0 ; tmp2
181
182 ; -- Odd part
183
184 movd mm2, DWORD [DWBLOCK(1,0,esi,SIZEOF_JCOEF)]
185 movd mm3, DWORD [DWBLOCK(3,0,esi,SIZEOF_JCOEF)]
186 movd mm5, DWORD [DWBLOCK(5,0,esi,SIZEOF_JCOEF)]
187 movd mm1, DWORD [DWBLOCK(7,0,esi,SIZEOF_JCOEF)]
188
189 punpcklwd mm2,mm2
190 punpcklwd mm3,mm3
191 psrad mm2,(DWORD_BIT-WORD_BIT)
192 psrad mm3,(DWORD_BIT-WORD_BIT)
193 pi2fd mm2,mm2
194 pi2fd mm3,mm3
195
196 pfmul mm2, MMWORD [MMBLOCK(1,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
197 pfmul mm3, MMWORD [MMBLOCK(3,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
198
199 punpcklwd mm5,mm5
200 punpcklwd mm1,mm1
201 psrad mm5,(DWORD_BIT-WORD_BIT)
202 psrad mm1,(DWORD_BIT-WORD_BIT)
203 pi2fd mm5,mm5
204 pi2fd mm1,mm1
205
206 pfmul mm5, MMWORD [MMBLOCK(5,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
207 pfmul mm1, MMWORD [MMBLOCK(7,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
208
209 movq mm4,mm2
210 movq mm0,mm5
211 pfadd mm2,mm1 ; mm2=z11
212 pfadd mm5,mm3 ; mm5=z13
213 pfsub mm4,mm1 ; mm4=z12
214 pfsub mm0,mm3 ; mm0=z10
215
216 movq mm1,mm2
217 pfsub mm2,mm5
218 pfadd mm1,mm5 ; mm1=tmp7
219
220 pfmul mm2,[GOTOFF(ebx,PD_1_414)] ; mm2=tmp11
221
222 movq mm3,mm0
223 pfadd mm0,mm4
224 pfmul mm0,[GOTOFF(ebx,PD_1_847)] ; mm0=z5
225 pfmul mm3,[GOTOFF(ebx,PD_2_613)] ; mm3=(z10 * 2.613125930)
226 pfmul mm4,[GOTOFF(ebx,PD_1_082)] ; mm4=(z12 * 1.082392200)
227 pfsubr mm3,mm0 ; mm3=tmp12
228 pfsub mm4,mm0 ; mm4=tmp10
229
230 ; -- Final output stage
231
232 pfsub mm3,mm1 ; mm3=tmp6
233 movq mm5,mm6
234 movq mm0,mm7
235 pfadd mm6,mm1 ; mm6=data0=(00 01)
236 pfadd mm7,mm3 ; mm7=data1=(10 11)
237 pfsub mm5,mm1 ; mm5=data7=(70 71)
238 pfsub mm0,mm3 ; mm0=data6=(60 61)
239 pfsub mm2,mm3 ; mm2=tmp5
240
241 movq mm1,mm6 ; transpose coefficients
242 punpckldq mm6,mm7 ; mm6=(00 10)
243 punpckhdq mm1,mm7 ; mm1=(01 11)
244 movq mm3,mm0 ; transpose coefficients
245 punpckldq mm0,mm5 ; mm0=(60 70)
246 punpckhdq mm3,mm5 ; mm3=(61 71)
247
248 movq MMWORD [MMBLOCK(0,0,edi,SIZEOF_FAST_FLOAT)], mm6
249 movq MMWORD [MMBLOCK(1,0,edi,SIZEOF_FAST_FLOAT)], mm1
250 movq MMWORD [MMBLOCK(0,3,edi,SIZEOF_FAST_FLOAT)], mm0
251 movq MMWORD [MMBLOCK(1,3,edi,SIZEOF_FAST_FLOAT)], mm3
252
253 movq mm7, MMWORD [wk(0)] ; mm7=tmp2
254 movq mm5, MMWORD [wk(1)] ; mm5=tmp3
255
256 pfadd mm4,mm2 ; mm4=tmp4
257 movq mm6,mm7
258 movq mm1,mm5
259 pfadd mm7,mm2 ; mm7=data2=(20 21)
260 pfadd mm5,mm4 ; mm5=data4=(40 41)
261 pfsub mm6,mm2 ; mm6=data5=(50 51)
262 pfsub mm1,mm4 ; mm1=data3=(30 31)
263
264 movq mm0,mm7 ; transpose coefficients
265 punpckldq mm7,mm1 ; mm7=(20 30)
266 punpckhdq mm0,mm1 ; mm0=(21 31)
267 movq mm3,mm5 ; transpose coefficients
268 punpckldq mm5,mm6 ; mm5=(40 50)
269 punpckhdq mm3,mm6 ; mm3=(41 51)
270
271 movq MMWORD [MMBLOCK(0,1,edi,SIZEOF_FAST_FLOAT)], mm7
272 movq MMWORD [MMBLOCK(1,1,edi,SIZEOF_FAST_FLOAT)], mm0
273 movq MMWORD [MMBLOCK(0,2,edi,SIZEOF_FAST_FLOAT)], mm5
274 movq MMWORD [MMBLOCK(1,2,edi,SIZEOF_FAST_FLOAT)], mm3
275
276.nextcolumn:
277 add esi, byte 2*SIZEOF_JCOEF ; coef_block
278 add edx, byte 2*SIZEOF_FLOAT_MULT_TYPE ; quantptr
279 add edi, byte 2*DCTSIZE*SIZEOF_FAST_FLOAT ; wsptr
280 dec ecx ; ctr
281 jnz near .columnloop
282
283 ; -- Prefetch the next coefficient block
284
285 prefetch [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 0*32]
286 prefetch [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 1*32]
287 prefetch [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 2*32]
288 prefetch [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 3*32]
289
290 ; ---- Pass 2: process rows from work array, store into output array.
291
292 mov eax, [original_ebp]
293 lea esi, [workspace] ; FAST_FLOAT * wsptr
294 mov edi, JSAMPARRAY [output_buf(eax)] ; (JSAMPROW *)
295 mov eax, JDIMENSION [output_col(eax)]
296 mov ecx, DCTSIZE/2 ; ctr
297 alignx 16,7
298.rowloop:
299
300 ; -- Even part
301
302 movq mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_FAST_FLOAT)]
303 movq mm1, MMWORD [MMBLOCK(2,0,esi,SIZEOF_FAST_FLOAT)]
304 movq mm2, MMWORD [MMBLOCK(4,0,esi,SIZEOF_FAST_FLOAT)]
305 movq mm3, MMWORD [MMBLOCK(6,0,esi,SIZEOF_FAST_FLOAT)]
306
307 movq mm4,mm0
308 movq mm5,mm1
309 pfsub mm0,mm2 ; mm0=tmp11
310 pfsub mm1,mm3
311 pfadd mm4,mm2 ; mm4=tmp10
312 pfadd mm5,mm3 ; mm5=tmp13
313
314 pfmul mm1,[GOTOFF(ebx,PD_1_414)]
315 pfsub mm1,mm5 ; mm1=tmp12
316
317 movq mm6,mm4
318 movq mm7,mm0
319 pfsub mm4,mm5 ; mm4=tmp3
320 pfsub mm0,mm1 ; mm0=tmp2
321 pfadd mm6,mm5 ; mm6=tmp0
322 pfadd mm7,mm1 ; mm7=tmp1
323
324 movq MMWORD [wk(1)], mm4 ; tmp3
325 movq MMWORD [wk(0)], mm0 ; tmp2
326
327 ; -- Odd part
328
329 movq mm2, MMWORD [MMBLOCK(1,0,esi,SIZEOF_FAST_FLOAT)]
330 movq mm3, MMWORD [MMBLOCK(3,0,esi,SIZEOF_FAST_FLOAT)]
331 movq mm5, MMWORD [MMBLOCK(5,0,esi,SIZEOF_FAST_FLOAT)]
332 movq mm1, MMWORD [MMBLOCK(7,0,esi,SIZEOF_FAST_FLOAT)]
333
334 movq mm4,mm2
335 movq mm0,mm5
336 pfadd mm2,mm1 ; mm2=z11
337 pfadd mm5,mm3 ; mm5=z13
338 pfsub mm4,mm1 ; mm4=z12
339 pfsub mm0,mm3 ; mm0=z10
340
341 movq mm1,mm2
342 pfsub mm2,mm5
343 pfadd mm1,mm5 ; mm1=tmp7
344
345 pfmul mm2,[GOTOFF(ebx,PD_1_414)] ; mm2=tmp11
346
347 movq mm3,mm0
348 pfadd mm0,mm4
349 pfmul mm0,[GOTOFF(ebx,PD_1_847)] ; mm0=z5
350 pfmul mm3,[GOTOFF(ebx,PD_2_613)] ; mm3=(z10 * 2.613125930)
351 pfmul mm4,[GOTOFF(ebx,PD_1_082)] ; mm4=(z12 * 1.082392200)
352 pfsubr mm3,mm0 ; mm3=tmp12
353 pfsub mm4,mm0 ; mm4=tmp10
354
355 ; -- Final output stage
356
357 pfsub mm3,mm1 ; mm3=tmp6
358 movq mm5,mm6
359 movq mm0,mm7
360 pfadd mm6,mm1 ; mm6=data0=(00 10)
361 pfadd mm7,mm3 ; mm7=data1=(01 11)
362 pfsub mm5,mm1 ; mm5=data7=(07 17)
363 pfsub mm0,mm3 ; mm0=data6=(06 16)
364 pfsub mm2,mm3 ; mm2=tmp5
365
366 movq mm1,[GOTOFF(ebx,PD_RNDINT_MAGIC)] ; mm1=[PD_RNDINT_MAGIC]
367 pcmpeqd mm3,mm3
368 psrld mm3,WORD_BIT ; mm3={0xFFFF 0x0000 0xFFFF 0x0000}
369
370 pfadd mm6,mm1 ; mm6=roundint(data0/8)=(00 ** 10 **)
371 pfadd mm7,mm1 ; mm7=roundint(data1/8)=(01 ** 11 **)
372 pfadd mm0,mm1 ; mm0=roundint(data6/8)=(06 ** 16 **)
373 pfadd mm5,mm1 ; mm5=roundint(data7/8)=(07 ** 17 **)
374
375 pand mm6,mm3 ; mm6=(00 -- 10 --)
376 pslld mm7,WORD_BIT ; mm7=(-- 01 -- 11)
377 pand mm0,mm3 ; mm0=(06 -- 16 --)
378 pslld mm5,WORD_BIT ; mm5=(-- 07 -- 17)
379 por mm6,mm7 ; mm6=(00 01 10 11)
380 por mm0,mm5 ; mm0=(06 07 16 17)
381
382 movq mm1, MMWORD [wk(0)] ; mm1=tmp2
383 movq mm3, MMWORD [wk(1)] ; mm3=tmp3
384
385 pfadd mm4,mm2 ; mm4=tmp4
386 movq mm7,mm1
387 movq mm5,mm3
388 pfadd mm1,mm2 ; mm1=data2=(02 12)
389 pfadd mm3,mm4 ; mm3=data4=(04 14)
390 pfsub mm7,mm2 ; mm7=data5=(05 15)
391 pfsub mm5,mm4 ; mm5=data3=(03 13)
392
393 movq mm2,[GOTOFF(ebx,PD_RNDINT_MAGIC)] ; mm2=[PD_RNDINT_MAGIC]
394 pcmpeqd mm4,mm4
395 psrld mm4,WORD_BIT ; mm4={0xFFFF 0x0000 0xFFFF 0x0000}
396
397 pfadd mm3,mm2 ; mm3=roundint(data4/8)=(04 ** 14 **)
398 pfadd mm7,mm2 ; mm7=roundint(data5/8)=(05 ** 15 **)
399 pfadd mm1,mm2 ; mm1=roundint(data2/8)=(02 ** 12 **)
400 pfadd mm5,mm2 ; mm5=roundint(data3/8)=(03 ** 13 **)
401
402 pand mm3,mm4 ; mm3=(04 -- 14 --)
403 pslld mm7,WORD_BIT ; mm7=(-- 05 -- 15)
404 pand mm1,mm4 ; mm1=(02 -- 12 --)
405 pslld mm5,WORD_BIT ; mm5=(-- 03 -- 13)
406 por mm3,mm7 ; mm3=(04 05 14 15)
407 por mm1,mm5 ; mm1=(02 03 12 13)
408
409 movq mm2,[GOTOFF(ebx,PB_CENTERJSAMP)] ; mm2=[PB_CENTERJSAMP]
410
411 packsswb mm6,mm3 ; mm6=(00 01 10 11 04 05 14 15)
412 packsswb mm1,mm0 ; mm1=(02 03 12 13 06 07 16 17)
413 paddb mm6,mm2
414 paddb mm1,mm2
415
416 movq mm4,mm6 ; transpose coefficients(phase 2)
417 punpcklwd mm6,mm1 ; mm6=(00 01 02 03 10 11 12 13)
418 punpckhwd mm4,mm1 ; mm4=(04 05 06 07 14 15 16 17)
419
420 movq mm7,mm6 ; transpose coefficients(phase 3)
421 punpckldq mm6,mm4 ; mm6=(00 01 02 03 04 05 06 07)
422 punpckhdq mm7,mm4 ; mm7=(10 11 12 13 14 15 16 17)
423
424 pushpic ebx ; save GOT address
425
426 mov edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW]
427 mov ebx, JSAMPROW [edi+1*SIZEOF_JSAMPROW]
428 movq MMWORD [edx+eax*SIZEOF_JSAMPLE], mm6
429 movq MMWORD [ebx+eax*SIZEOF_JSAMPLE], mm7
430
431 poppic ebx ; restore GOT address
432
433 add esi, byte 2*SIZEOF_FAST_FLOAT ; wsptr
434 add edi, byte 2*SIZEOF_JSAMPROW
435 dec ecx ; ctr
436 jnz near .rowloop
437
438 femms ; empty MMX/3DNow! state
439
440 pop edi
441 pop esi
442; pop edx ; need not be preserved
443; pop ecx ; need not be preserved
444 pop ebx
445 mov esp,ebp ; esp <- aligned ebp
446 pop esp ; esp <- original ebp
447 pop ebp
448 ret
449
DRC132b5fd2009-10-08 09:04:56 +0000[diff] [blame]450; For some reason, the OS X linker does not honor the request to align the
451; segment unless we do this.
452 align 16