/
SDL_yuv_mmx.c
429 lines (372 loc) · 19 KB
/
SDL_yuv_mmx.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2006 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
*/
#include "SDL_config.h"
#if (__GNUC__ > 2) && defined(__i386__) && SDL_ASSEMBLY_ROUTINES
#include "SDL_stdinc.h"
#include "mmx.h"
static mmx_t MMX_0080w = { .ud = {0x00800080, 0x00800080} };
static mmx_t MMX_00FFw = { .ud = {0x00ff00ff, 0x00ff00ff} };
static mmx_t MMX_FF00w = { .ud = {0xff00ff00, 0xff00ff00} };
static mmx_t MMX_Ycoeff = { .uw = {0x004a, 0x004a, 0x004a, 0x004a} };
static mmx_t MMX_UbluRGB = { .uw = {0x0072, 0x0072, 0x0072, 0x0072} };
static mmx_t MMX_VredRGB = { .uw = {0x0059, 0x0059, 0x0059, 0x0059} };
static mmx_t MMX_UgrnRGB = { .uw = {0xffea, 0xffea, 0xffea, 0xffea} };
static mmx_t MMX_VgrnRGB = { .uw = {0xffd2, 0xffd2, 0xffd2, 0xffd2} };
static mmx_t MMX_Ublu5x5 = { .uw = {0x0081, 0x0081, 0x0081, 0x0081} };
static mmx_t MMX_Vred5x5 = { .uw = {0x0066, 0x0066, 0x0066, 0x0066} };
static mmx_t MMX_Ugrn555 = { .uw = {0xffe7, 0xffe7, 0xffe7, 0xffe7} };
static mmx_t MMX_Vgrn555 = { .uw = {0xffcc, 0xffcc, 0xffcc, 0xffcc} };
static mmx_t MMX_Ugrn565 = { .uw = {0xffe8, 0xffe8, 0xffe8, 0xffe8} };
static mmx_t MMX_Vgrn565 = { .uw = {0xffcd, 0xffcd, 0xffcd, 0xffcd} };
static mmx_t MMX_red555 = { .uw = {0x7c00, 0x7c00, 0x7c00, 0x7c00} };
static mmx_t MMX_red565 = { .uw = {0xf800, 0xf800, 0xf800, 0xf800} };
static mmx_t MMX_grn555 = { .uw = {0x03e0, 0x03e0, 0x03e0, 0x03e0} };
static mmx_t MMX_grn565 = { .uw = {0x07e0, 0x07e0, 0x07e0, 0x07e0} };
static mmx_t MMX_blu5x5 = { .uw = {0x001f, 0x001f, 0x001f, 0x001f} };
/**
This MMX assembler is my first assembler/MMX program ever.
Thus it maybe buggy.
Send patches to:
mvogt@rhrk.uni-kl.de
After it worked fine I have "obfuscated" the code a bit to have
more parallism in the MMX units. This means I moved
initilisation around and delayed other instruction.
Performance measurement did not show that this brought any advantage
but in theory it _should_ be faster this way.
The overall performanve gain to the C based dither was 30%-40%.
The MMX routine calculates 256bit=8RGB values in each cycle
(4 for row1 & 4 for row2)
The red/green/blue.. coefficents are taken from the mpeg_play
player. They look nice, but I dont know if you can have
better values, to avoid integer rounding errors.
IMPORTANT:
==========
It is a requirement that the cr/cb/lum are 8 byte aligned and
the out are 16byte aligned or you will/may get segfaults
*/
void ColorRGBDitherYV12MMX1X( int *colortab, Uint32 *rgb_2_pix,
unsigned char *lum, unsigned char *cr,
unsigned char *cb, unsigned char *out,
int rows, int cols, int mod )
{
Uint32 *row1;
Uint32 *row2;
unsigned char* y = lum +cols*rows; // Pointer to the end
int x = 0;
row1 = (Uint32 *)out; // 32 bit target
row2 = (Uint32 *)out+cols+mod; // start of second row
mod = (mod+cols+mod)*4; // increment for row1 in byte
__asm__ __volatile__ (
// tap dance to workaround the inability to use %%ebx at will...
// move one thing to the stack...
"pushl $0\n" // save a slot on the stack.
"pushl %%ebx\n" // save %%ebx.
"movl %0, %%ebx\n" // put the thing in ebx.
"movl %%ebx,4(%%esp)\n" // put the thing in the stack slot.
"popl %%ebx\n" // get back %%ebx (the PIC register).
".align 8\n"
"1:\n"
// create Cr (result in mm1)
"pushl %%ebx\n"
"movl 4(%%esp),%%ebx\n"
"movd (%%ebx),%%mm1\n" // 0 0 0 0 v3 v2 v1 v0
"popl %%ebx\n"
"pxor %%mm7,%%mm7\n" // 00 00 00 00 00 00 00 00
"movd (%2), %%mm2\n" // 0 0 0 0 l3 l2 l1 l0
"punpcklbw %%mm7,%%mm1\n" // 0 v3 0 v2 00 v1 00 v0
"punpckldq %%mm1,%%mm1\n" // 00 v1 00 v0 00 v1 00 v0
"psubw %9,%%mm1\n" // mm1-128:r1 r1 r0 r0 r1 r1 r0 r0
// create Cr_g (result in mm0)
"movq %%mm1,%%mm0\n" // r1 r1 r0 r0 r1 r1 r0 r0
"pmullw %10,%%mm0\n" // red*-46dec=0.7136*64
"pmullw %11,%%mm1\n" // red*89dec=1.4013*64
"psraw $6, %%mm0\n" // red=red/64
"psraw $6, %%mm1\n" // red=red/64
// create L1 L2 (result in mm2,mm4)
// L2=lum+cols
"movq (%2,%4),%%mm3\n" // 0 0 0 0 L3 L2 L1 L0
"punpckldq %%mm3,%%mm2\n" // L3 L2 L1 L0 l3 l2 l1 l0
"movq %%mm2,%%mm4\n" // L3 L2 L1 L0 l3 l2 l1 l0
"pand %12,%%mm2\n" // L3 0 L1 0 l3 0 l1 0
"pand %13,%%mm4\n" // 0 L2 0 L0 0 l2 0 l0
"psrlw $8,%%mm2\n" // 0 L3 0 L1 0 l3 0 l1
// create R (result in mm6)
"movq %%mm2,%%mm5\n" // 0 L3 0 L1 0 l3 0 l1
"movq %%mm4,%%mm6\n" // 0 L2 0 L0 0 l2 0 l0
"paddsw %%mm1, %%mm5\n" // lum1+red:x R3 x R1 x r3 x r1
"paddsw %%mm1, %%mm6\n" // lum1+red:x R2 x R0 x r2 x r0
"packuswb %%mm5,%%mm5\n" // R3 R1 r3 r1 R3 R1 r3 r1
"packuswb %%mm6,%%mm6\n" // R2 R0 r2 r0 R2 R0 r2 r0
"pxor %%mm7,%%mm7\n" // 00 00 00 00 00 00 00 00
"punpcklbw %%mm5,%%mm6\n" // R3 R2 R1 R0 r3 r2 r1 r0
// create Cb (result in mm1)
"movd (%1), %%mm1\n" // 0 0 0 0 u3 u2 u1 u0
"punpcklbw %%mm7,%%mm1\n" // 0 u3 0 u2 00 u1 00 u0
"punpckldq %%mm1,%%mm1\n" // 00 u1 00 u0 00 u1 00 u0
"psubw %9,%%mm1\n" // mm1-128:u1 u1 u0 u0 u1 u1 u0 u0
// create Cb_g (result in mm5)
"movq %%mm1,%%mm5\n" // u1 u1 u0 u0 u1 u1 u0 u0
"pmullw %14,%%mm5\n" // blue*-109dec=1.7129*64
"pmullw %15,%%mm1\n" // blue*114dec=1.78125*64
"psraw $6, %%mm5\n" // blue=red/64
"psraw $6, %%mm1\n" // blue=blue/64
// create G (result in mm7)
"movq %%mm2,%%mm3\n" // 0 L3 0 L1 0 l3 0 l1
"movq %%mm4,%%mm7\n" // 0 L2 0 L0 0 l2 0 l1
"paddsw %%mm5, %%mm3\n" // lum1+Cb_g:x G3t x G1t x g3t x g1t
"paddsw %%mm5, %%mm7\n" // lum1+Cb_g:x G2t x G0t x g2t x g0t
"paddsw %%mm0, %%mm3\n" // lum1+Cr_g:x G3 x G1 x g3 x g1
"paddsw %%mm0, %%mm7\n" // lum1+blue:x G2 x G0 x g2 x g0
"packuswb %%mm3,%%mm3\n" // G3 G1 g3 g1 G3 G1 g3 g1
"packuswb %%mm7,%%mm7\n" // G2 G0 g2 g0 G2 G0 g2 g0
"punpcklbw %%mm3,%%mm7\n" // G3 G2 G1 G0 g3 g2 g1 g0
// create B (result in mm5)
"movq %%mm2,%%mm3\n" // 0 L3 0 L1 0 l3 0 l1
"movq %%mm4,%%mm5\n" // 0 L2 0 L0 0 l2 0 l1
"paddsw %%mm1, %%mm3\n" // lum1+blue:x B3 x B1 x b3 x b1
"paddsw %%mm1, %%mm5\n" // lum1+blue:x B2 x B0 x b2 x b0
"packuswb %%mm3,%%mm3\n" // B3 B1 b3 b1 B3 B1 b3 b1
"packuswb %%mm5,%%mm5\n" // B2 B0 b2 b0 B2 B0 b2 b0
"punpcklbw %%mm3,%%mm5\n" // B3 B2 B1 B0 b3 b2 b1 b0
// fill destination row1 (needed are mm6=Rr,mm7=Gg,mm5=Bb)
"pxor %%mm2,%%mm2\n" // 0 0 0 0 0 0 0 0
"pxor %%mm4,%%mm4\n" // 0 0 0 0 0 0 0 0
"movq %%mm6,%%mm1\n" // R3 R2 R1 R0 r3 r2 r1 r0
"movq %%mm5,%%mm3\n" // B3 B2 B1 B0 b3 b2 b1 b0
// process lower lum
"punpcklbw %%mm4,%%mm1\n" // 0 r3 0 r2 0 r1 0 r0
"punpcklbw %%mm4,%%mm3\n" // 0 b3 0 b2 0 b1 0 b0
"movq %%mm1,%%mm2\n" // 0 r3 0 r2 0 r1 0 r0
"movq %%mm3,%%mm0\n" // 0 b3 0 b2 0 b1 0 b0
"punpcklwd %%mm1,%%mm3\n" // 0 r1 0 b1 0 r0 0 b0
"punpckhwd %%mm2,%%mm0\n" // 0 r3 0 b3 0 r2 0 b2
"pxor %%mm2,%%mm2\n" // 0 0 0 0 0 0 0 0
"movq %%mm7,%%mm1\n" // G3 G2 G1 G0 g3 g2 g1 g0
"punpcklbw %%mm1,%%mm2\n" // g3 0 g2 0 g1 0 g0 0
"punpcklwd %%mm4,%%mm2\n" // 0 0 g1 0 0 0 g0 0
"por %%mm3, %%mm2\n" // 0 r1 g1 b1 0 r0 g0 b0
"movq %%mm2,(%3)\n" // wrote out ! row1
"pxor %%mm2,%%mm2\n" // 0 0 0 0 0 0 0 0
"punpcklbw %%mm1,%%mm4\n" // g3 0 g2 0 g1 0 g0 0
"punpckhwd %%mm2,%%mm4\n" // 0 0 g3 0 0 0 g2 0
"por %%mm0, %%mm4\n" // 0 r3 g3 b3 0 r2 g2 b2
"movq %%mm4,8(%3)\n" // wrote out ! row1
// fill destination row2 (needed are mm6=Rr,mm7=Gg,mm5=Bb)
// this can be done "destructive"
"pxor %%mm2,%%mm2\n" // 0 0 0 0 0 0 0 0
"punpckhbw %%mm2,%%mm6\n" // 0 R3 0 R2 0 R1 0 R0
"punpckhbw %%mm1,%%mm5\n" // G3 B3 G2 B2 G1 B1 G0 B0
"movq %%mm5,%%mm1\n" // G3 B3 G2 B2 G1 B1 G0 B0
"punpcklwd %%mm6,%%mm1\n" // 0 R1 G1 B1 0 R0 G0 B0
"movq %%mm1,(%5)\n" // wrote out ! row2
"punpckhwd %%mm6,%%mm5\n" // 0 R3 G3 B3 0 R2 G2 B2
"movq %%mm5,8(%5)\n" // wrote out ! row2
"addl $4,%2\n" // lum+4
"leal 16(%3),%3\n" // row1+16
"leal 16(%5),%5\n" // row2+16
"addl $2,(%%esp)\n" // cr+2
"addl $2,%1\n" // cb+2
"addl $4,%6\n" // x+4
"cmpl %4,%6\n"
"jl 1b\n"
"addl %4,%2\n" // lum += cols
"addl %8,%3\n" // row1+= mod
"addl %8,%5\n" // row2+= mod
"movl $0,%6\n" // x=0
"cmpl %7,%2\n"
"jl 1b\n"
"addl $4,%%esp\n" // get rid of the stack slot we reserved.
"emms\n" // reset MMX registers.
:
: "m" (cr), "r"(cb),"r"(lum),
"r"(row1),"r"(cols),"r"(row2),"m"(x),"m"(y),"m"(mod),
"m"(MMX_0080w),"m"(MMX_VgrnRGB),"m"(MMX_VredRGB),
"m"(MMX_FF00w),"m"(MMX_00FFw),"m"(MMX_UgrnRGB),
"m"(MMX_UbluRGB)
);
}
void Color565DitherYV12MMX1X( int *colortab, Uint32 *rgb_2_pix,
unsigned char *lum, unsigned char *cr,
unsigned char *cb, unsigned char *out,
int rows, int cols, int mod )
{
Uint16 *row1;
Uint16 *row2;
unsigned char* y = lum +cols*rows; /* Pointer to the end */
int x = 0;
row1 = (Uint16 *)out; /* 16 bit target */
row2 = (Uint16 *)out+cols+mod; /* start of second row */
mod = (mod+cols+mod)*2; /* increment for row1 in byte */
__asm__ __volatile__(
// tap dance to workaround the inability to use %%ebx at will...
// move one thing to the stack...
"pushl $0\n" // save a slot on the stack.
"pushl %%ebx\n" // save %%ebx.
"movl %0, %%ebx\n" // put the thing in ebx.
"movl %%ebx, 4(%%esp)\n" // put the thing in the stack slot.
"popl %%ebx\n" // get back %%ebx (the PIC register).
".align 8\n"
"1:\n"
"movd (%1), %%mm0\n" // 4 Cb 0 0 0 0 u3 u2 u1 u0
"pxor %%mm7, %%mm7\n"
"pushl %%ebx\n"
"movl 4(%%esp), %%ebx\n"
"movd (%%ebx), %%mm1\n" // 4 Cr 0 0 0 0 v3 v2 v1 v0
"popl %%ebx\n"
"punpcklbw %%mm7, %%mm0\n" // 4 W cb 0 u3 0 u2 0 u1 0 u0
"punpcklbw %%mm7, %%mm1\n" // 4 W cr 0 v3 0 v2 0 v1 0 v0
"psubw %9, %%mm0\n"
"psubw %9, %%mm1\n"
"movq %%mm0, %%mm2\n" // Cb 0 u3 0 u2 0 u1 0 u0
"movq %%mm1, %%mm3\n" // Cr
"pmullw %10, %%mm2\n" // Cb2green 0 R3 0 R2 0 R1 0 R0
"movq (%2), %%mm6\n" // L1 l7 L6 L5 L4 L3 L2 L1 L0
"pmullw %11, %%mm0\n" // Cb2blue
"pand %12, %%mm6\n" // L1 00 L6 00 L4 00 L2 00 L0
"pmullw %13, %%mm3\n" // Cr2green
"movq (%2), %%mm7\n" // L2
"pmullw %14, %%mm1\n" // Cr2red
"psrlw $8, %%mm7\n" // L2 00 L7 00 L5 00 L3 00 L1
"pmullw %15, %%mm6\n" // lum1
"paddw %%mm3, %%mm2\n" // Cb2green + Cr2green == green
"pmullw %15, %%mm7\n" // lum2
"movq %%mm6, %%mm4\n" // lum1
"paddw %%mm0, %%mm6\n" // lum1 +blue 00 B6 00 B4 00 B2 00 B0
"movq %%mm4, %%mm5\n" // lum1
"paddw %%mm1, %%mm4\n" // lum1 +red 00 R6 00 R4 00 R2 00 R0
"paddw %%mm2, %%mm5\n" // lum1 +green 00 G6 00 G4 00 G2 00 G0
"psraw $6, %%mm4\n" // R1 0 .. 64
"movq %%mm7, %%mm3\n" // lum2 00 L7 00 L5 00 L3 00 L1
"psraw $6, %%mm5\n" // G1 - .. +
"paddw %%mm0, %%mm7\n" // Lum2 +blue 00 B7 00 B5 00 B3 00 B1
"psraw $6, %%mm6\n" // B1 0 .. 64
"packuswb %%mm4, %%mm4\n" // R1 R1
"packuswb %%mm5, %%mm5\n" // G1 G1
"packuswb %%mm6, %%mm6\n" // B1 B1
"punpcklbw %%mm4, %%mm4\n"
"punpcklbw %%mm5, %%mm5\n"
"pand %16, %%mm4\n"
"psllw $3, %%mm5\n" // GREEN 1
"punpcklbw %%mm6, %%mm6\n"
"pand %17, %%mm5\n"
"pand %16, %%mm6\n"
"por %%mm5, %%mm4\n" //
"psrlw $11, %%mm6\n" // BLUE 1
"movq %%mm3, %%mm5\n" // lum2
"paddw %%mm1, %%mm3\n" // lum2 +red 00 R7 00 R5 00 R3 00 R1
"paddw %%mm2, %%mm5\n" // lum2 +green 00 G7 00 G5 00 G3 00 G1
"psraw $6, %%mm3\n" // R2
"por %%mm6, %%mm4\n" // MM4
"psraw $6, %%mm5\n" // G2
"movq (%2, %4), %%mm6\n" // L3 load lum2
"psraw $6, %%mm7\n"
"packuswb %%mm3, %%mm3\n"
"packuswb %%mm5, %%mm5\n"
"packuswb %%mm7, %%mm7\n"
"pand %12, %%mm6\n" // L3
"punpcklbw %%mm3, %%mm3\n"
"punpcklbw %%mm5, %%mm5\n"
"pmullw %15, %%mm6\n" // lum3
"punpcklbw %%mm7, %%mm7\n"
"psllw $3, %%mm5\n" // GREEN 2
"pand %16, %%mm7\n"
"pand %16, %%mm3\n"
"psrlw $11, %%mm7\n" // BLUE 2
"pand %17, %%mm5\n"
"por %%mm7, %%mm3\n"
"movq (%2,%4), %%mm7\n" // L4 load lum2
"por %%mm5, %%mm3\n" //
"psrlw $8, %%mm7\n" // L4
"movq %%mm4, %%mm5\n"
"punpcklwd %%mm3, %%mm4\n"
"pmullw %15, %%mm7\n" // lum4
"punpckhwd %%mm3, %%mm5\n"
"movq %%mm4, (%3)\n" // write row1
"movq %%mm5, 8(%3)\n" // write row1
"movq %%mm6, %%mm4\n" // Lum3
"paddw %%mm0, %%mm6\n" // Lum3 +blue
"movq %%mm4, %%mm5\n" // Lum3
"paddw %%mm1, %%mm4\n" // Lum3 +red
"paddw %%mm2, %%mm5\n" // Lum3 +green
"psraw $6, %%mm4\n"
"movq %%mm7, %%mm3\n" // Lum4
"psraw $6, %%mm5\n"
"paddw %%mm0, %%mm7\n" // Lum4 +blue
"psraw $6, %%mm6\n" // Lum3 +blue
"movq %%mm3, %%mm0\n" // Lum4
"packuswb %%mm4, %%mm4\n"
"paddw %%mm1, %%mm3\n" // Lum4 +red
"packuswb %%mm5, %%mm5\n"
"paddw %%mm2, %%mm0\n" // Lum4 +green
"packuswb %%mm6, %%mm6\n"
"punpcklbw %%mm4, %%mm4\n"
"punpcklbw %%mm5, %%mm5\n"
"punpcklbw %%mm6, %%mm6\n"
"psllw $3, %%mm5\n" // GREEN 3
"pand %16, %%mm4\n"
"psraw $6, %%mm3\n" // psr 6
"psraw $6, %%mm0\n"
"pand %16, %%mm6\n" // BLUE
"pand %17, %%mm5\n"
"psrlw $11, %%mm6\n" // BLUE 3
"por %%mm5, %%mm4\n"
"psraw $6, %%mm7\n"
"por %%mm6, %%mm4\n"
"packuswb %%mm3, %%mm3\n"
"packuswb %%mm0, %%mm0\n"
"packuswb %%mm7, %%mm7\n"
"punpcklbw %%mm3, %%mm3\n"
"punpcklbw %%mm0, %%mm0\n"
"punpcklbw %%mm7, %%mm7\n"
"pand %16, %%mm3\n"
"pand %16, %%mm7\n" // BLUE
"psllw $3, %%mm0\n" // GREEN 4
"psrlw $11, %%mm7\n"
"pand %17, %%mm0\n"
"por %%mm7, %%mm3\n"
"por %%mm0, %%mm3\n"
"movq %%mm4, %%mm5\n"
"punpcklwd %%mm3, %%mm4\n"
"punpckhwd %%mm3, %%mm5\n"
"movq %%mm4, (%5)\n"
"movq %%mm5, 8(%5)\n"
"addl $8, %6\n"
"addl $8, %2\n"
"addl $4, (%%esp)\n"
"addl $4, %1\n"
"cmpl %4, %6\n"
"leal 16(%3), %3\n"
"leal 16(%5),%5\n" // row2+16
"jl 1b\n"
"addl %4, %2\n" // lum += cols
"addl %8, %3\n" // row1+= mod
"addl %8, %5\n" // row2+= mod
"movl $0, %6\n" // x=0
"cmpl %7, %2\n"
"jl 1b\n"
"addl $4, %%esp\n" // get rid of the stack slot we reserved.
"emms\n"
:
: "m" (cr), "r"(cb),"r"(lum),
"r"(row1),"r"(cols),"r"(row2),"m"(x),"m"(y),"m"(mod),
"m"(MMX_0080w),"m"(MMX_Ugrn565),"m"(MMX_Ublu5x5),
"m"(MMX_00FFw),"m"(MMX_Vgrn565),"m"(MMX_Vred5x5),
"m"(MMX_Ycoeff),"m"(MMX_red565),"m"(MMX_grn565)
);
}
#endif /* GCC3 i386 inline assembly */