e14743d1 |
1 | ; |
2 | ; x86 format converters for HERMES |
3 | ; Copyright (c) 1998 Glenn Fielder (gaffer@gaffer.org) |
4 | ; This source code is licensed under the GNU LGPL |
5 | ; |
6 | ; Please refer to the file COPYING.LIB contained in the distribution for |
7 | ; licensing conditions |
8 | ; |
9 | ; Routines adjusted for Hermes by Christian Nentwich (brn@eleet.mcb.at) |
10 | ; Used with permission. |
11 | ; |
12 | |
13 | BITS 32 |
14 | |
15 | %include "common.inc" |
16 | |
17 | SDL_FUNC _ConvertX86p16_16BGR565 |
18 | SDL_FUNC _ConvertX86p16_16RGB555 |
19 | SDL_FUNC _ConvertX86p16_16BGR555 |
20 | SDL_FUNC _ConvertX86p16_8RGB332 |
21 | |
22 | EXTERN _ConvertX86 |
23 | |
24 | SECTION .text |
25 | |
26 | _ConvertX86p16_16BGR565: |
27 | |
28 | ; check short |
29 | cmp ecx,BYTE 16 |
30 | ja .L3 |
31 | |
32 | |
33 | .L1 ; short loop |
34 | mov al,[esi] |
35 | mov ah,[esi+1] |
36 | mov ebx,eax |
37 | mov edx,eax |
38 | shr eax,11 |
39 | and eax,BYTE 11111b |
40 | and ebx,11111100000b |
41 | shl edx,11 |
42 | add eax,ebx |
43 | add eax,edx |
44 | mov [edi],al |
45 | mov [edi+1],ah |
46 | add esi,BYTE 2 |
47 | add edi,BYTE 2 |
48 | dec ecx |
49 | jnz .L1 |
50 | .L2 |
51 | retn |
52 | |
53 | .L3 ; head |
54 | mov eax,edi |
55 | and eax,BYTE 11b |
56 | jz .L4 |
57 | mov al,[esi] |
58 | mov ah,[esi+1] |
59 | mov ebx,eax |
60 | mov edx,eax |
61 | shr eax,11 |
62 | and eax,BYTE 11111b |
63 | and ebx,11111100000b |
64 | shl edx,11 |
65 | add eax,ebx |
66 | add eax,edx |
67 | mov [edi],al |
68 | mov [edi+1],ah |
69 | add esi,BYTE 2 |
70 | add edi,BYTE 2 |
71 | dec ecx |
72 | |
73 | .L4 ; save count |
74 | push ecx |
75 | |
76 | ; unroll twice |
77 | shr ecx,1 |
78 | |
79 | ; point arrays to end |
80 | lea esi,[esi+ecx*4] |
81 | lea edi,[edi+ecx*4] |
82 | |
83 | ; negative counter |
84 | neg ecx |
85 | jmp SHORT .L6 |
86 | |
87 | .L5 mov [edi+ecx*4-4],eax |
88 | .L6 mov eax,[esi+ecx*4] |
89 | |
90 | mov ebx,[esi+ecx*4] |
91 | and eax,07E007E0h |
92 | |
93 | mov edx,[esi+ecx*4] |
94 | and ebx,0F800F800h |
95 | |
96 | shr ebx,11 |
97 | and edx,001F001Fh |
98 | |
99 | shl edx,11 |
100 | add eax,ebx |
101 | |
102 | add eax,edx |
103 | inc ecx |
104 | |
105 | jnz .L5 |
106 | |
107 | mov [edi+ecx*4-4],eax |
108 | |
109 | ; tail |
110 | pop ecx |
111 | and ecx,BYTE 1 |
112 | jz .L7 |
113 | mov al,[esi] |
114 | mov ah,[esi+1] |
115 | mov ebx,eax |
116 | mov edx,eax |
117 | shr eax,11 |
118 | and eax,BYTE 11111b |
119 | and ebx,11111100000b |
120 | shl edx,11 |
121 | add eax,ebx |
122 | add eax,edx |
123 | mov [edi],al |
124 | mov [edi+1],ah |
125 | add esi,BYTE 2 |
126 | add edi,BYTE 2 |
127 | |
128 | .L7 |
129 | retn |
130 | |
131 | |
132 | |
133 | |
134 | |
135 | |
136 | _ConvertX86p16_16RGB555: |
137 | |
138 | ; check short |
139 | cmp ecx,BYTE 32 |
140 | ja .L3 |
141 | |
142 | |
143 | .L1 ; short loop |
144 | mov al,[esi] |
145 | mov ah,[esi+1] |
146 | mov ebx,eax |
147 | shr ebx,1 |
148 | and ebx, 0111111111100000b |
149 | and eax,BYTE 0000000000011111b |
150 | add eax,ebx |
151 | mov [edi],al |
152 | mov [edi+1],ah |
153 | add esi,BYTE 2 |
154 | add edi,BYTE 2 |
155 | dec ecx |
156 | jnz .L1 |
157 | .L2 |
158 | retn |
159 | |
160 | .L3 ; head |
161 | mov eax,edi |
162 | and eax,BYTE 11b |
163 | jz .L4 |
164 | mov al,[esi] |
165 | mov ah,[esi+1] |
166 | mov ebx,eax |
167 | shr ebx,1 |
168 | and ebx, 0111111111100000b |
169 | and eax,BYTE 0000000000011111b |
170 | add eax,ebx |
171 | mov [edi],al |
172 | mov [edi+1],ah |
173 | add esi,BYTE 2 |
174 | add edi,BYTE 2 |
175 | dec ecx |
176 | |
177 | .L4 ; save ebp |
178 | push ebp |
179 | |
180 | ; save count |
181 | push ecx |
182 | |
183 | ; unroll four times |
184 | shr ecx,2 |
185 | |
186 | ; point arrays to end |
187 | lea esi,[esi+ecx*8] |
188 | lea edi,[edi+ecx*8] |
189 | |
190 | ; negative counter |
191 | xor ebp,ebp |
192 | sub ebp,ecx |
193 | |
194 | .L5 mov eax,[esi+ebp*8] ; agi? |
195 | mov ecx,[esi+ebp*8+4] |
196 | |
197 | mov ebx,eax |
198 | mov edx,ecx |
199 | |
200 | and eax,0FFC0FFC0h |
201 | and ecx,0FFC0FFC0h |
202 | |
203 | shr eax,1 |
204 | and ebx,001F001Fh |
205 | |
206 | shr ecx,1 |
207 | and edx,001F001Fh |
208 | |
209 | add eax,ebx |
210 | add ecx,edx |
211 | |
212 | mov [edi+ebp*8],eax |
213 | mov [edi+ebp*8+4],ecx |
214 | |
215 | inc ebp |
216 | jnz .L5 |
217 | |
218 | ; tail |
219 | pop ecx |
220 | .L6 and ecx,BYTE 11b |
221 | jz .L7 |
222 | mov al,[esi] |
223 | mov ah,[esi+1] |
224 | mov ebx,eax |
225 | shr ebx,1 |
226 | and ebx, 0111111111100000b |
227 | and eax,BYTE 0000000000011111b |
228 | add eax,ebx |
229 | mov [edi],al |
230 | mov [edi+1],ah |
231 | add esi,BYTE 2 |
232 | add edi,BYTE 2 |
233 | dec ecx |
234 | jmp SHORT .L6 |
235 | |
236 | .L7 pop ebp |
237 | retn |
238 | |
239 | |
240 | |
241 | |
242 | |
243 | |
244 | _ConvertX86p16_16BGR555: |
245 | |
246 | ; check short |
247 | cmp ecx,BYTE 16 |
248 | ja .L3 |
249 | |
250 | |
251 | .L1 ; short loop |
252 | mov al,[esi] |
253 | mov ah,[esi+1] |
254 | mov ebx,eax |
255 | mov edx,eax |
256 | shr eax,11 |
257 | and eax,BYTE 11111b |
258 | shr ebx,1 |
259 | and ebx,1111100000b |
260 | shl edx,10 |
261 | and edx,0111110000000000b |
262 | add eax,ebx |
263 | add eax,edx |
264 | mov [edi],al |
265 | mov [edi+1],ah |
266 | add esi,BYTE 2 |
267 | add edi,BYTE 2 |
268 | dec ecx |
269 | jnz .L1 |
270 | .L2 |
271 | retn |
272 | |
273 | .L3 ; head |
274 | mov eax,edi |
275 | and eax,BYTE 11b |
276 | jz .L4 |
277 | mov al,[esi] |
278 | mov ah,[esi+1] |
279 | mov ebx,eax |
280 | mov edx,eax |
281 | shr eax,11 |
282 | and eax,BYTE 11111b |
283 | shr ebx,1 |
284 | and ebx,1111100000b |
285 | shl edx,10 |
286 | and edx,0111110000000000b |
287 | add eax,ebx |
288 | add eax,edx |
289 | mov [edi],al |
290 | mov [edi+1],ah |
291 | add esi,BYTE 2 |
292 | add edi,BYTE 2 |
293 | dec ecx |
294 | |
295 | .L4 ; save count |
296 | push ecx |
297 | |
298 | ; unroll twice |
299 | shr ecx,1 |
300 | |
301 | ; point arrays to end |
302 | lea esi,[esi+ecx*4] |
303 | lea edi,[edi+ecx*4] |
304 | |
305 | ; negative counter |
306 | neg ecx |
307 | jmp SHORT .L6 |
308 | |
309 | .L5 mov [edi+ecx*4-4],eax |
310 | .L6 mov eax,[esi+ecx*4] |
311 | |
312 | shr eax,1 |
313 | mov ebx,[esi+ecx*4] |
314 | |
315 | and eax,03E003E0h |
316 | mov edx,[esi+ecx*4] |
317 | |
318 | and ebx,0F800F800h |
319 | |
320 | shr ebx,11 |
321 | and edx,001F001Fh |
322 | |
323 | shl edx,10 |
324 | add eax,ebx |
325 | |
326 | add eax,edx |
327 | inc ecx |
328 | |
329 | jnz .L5 |
330 | |
331 | mov [edi+ecx*4-4],eax |
332 | |
333 | ; tail |
334 | pop ecx |
335 | and ecx,BYTE 1 |
336 | jz .L7 |
337 | mov al,[esi] |
338 | mov ah,[esi+1] |
339 | mov ebx,eax |
340 | mov edx,eax |
341 | shr eax,11 |
342 | and eax,BYTE 11111b |
343 | shr ebx,1 |
344 | and ebx,1111100000b |
345 | shl edx,10 |
346 | and edx,0111110000000000b |
347 | add eax,ebx |
348 | add eax,edx |
349 | mov [edi],al |
350 | mov [edi+1],ah |
351 | add esi,BYTE 2 |
352 | add edi,BYTE 2 |
353 | |
354 | .L7 |
355 | retn |
356 | |
357 | |
358 | |
359 | |
360 | |
361 | |
362 | _ConvertX86p16_8RGB332: |
363 | |
364 | ; check short |
365 | cmp ecx,BYTE 16 |
366 | ja .L3 |
367 | |
368 | |
369 | .L1 ; short loop |
370 | mov al,[esi+0] |
371 | mov ah,[esi+1] |
372 | mov ebx,eax |
373 | mov edx,eax |
374 | and eax,BYTE 11000b ; blue |
375 | shr eax,3 |
376 | and ebx,11100000000b ; green |
377 | shr ebx,6 |
378 | and edx,1110000000000000b ; red |
379 | shr edx,8 |
380 | add eax,ebx |
381 | add eax,edx |
382 | mov [edi],al |
383 | add esi,BYTE 2 |
384 | inc edi |
385 | dec ecx |
386 | jnz .L1 |
387 | .L2 |
388 | retn |
389 | |
390 | .L3 mov eax,edi |
391 | and eax,BYTE 11b |
392 | jz .L4 |
393 | mov al,[esi+0] |
394 | mov ah,[esi+1] |
395 | mov ebx,eax |
396 | mov edx,eax |
397 | and eax,BYTE 11000b ; blue |
398 | shr eax,3 |
399 | and ebx,11100000000b ; green |
400 | shr ebx,6 |
401 | and edx,1110000000000000b ; red |
402 | shr edx,8 |
403 | add eax,ebx |
404 | add eax,edx |
405 | mov [edi],al |
406 | add esi,BYTE 2 |
407 | inc edi |
408 | dec ecx |
409 | jmp SHORT .L3 |
410 | |
411 | .L4 ; save ebp |
412 | push ebp |
413 | |
414 | ; save count |
415 | push ecx |
416 | |
417 | ; unroll 4 times |
418 | shr ecx,2 |
419 | |
420 | ; prestep |
421 | mov dl,[esi+0] |
422 | mov bl,[esi+1] |
423 | mov dh,[esi+2] |
424 | |
425 | .L5 shl edx,16 |
426 | mov bh,[esi+3] |
427 | |
428 | shl ebx,16 |
429 | mov dl,[esi+4] |
430 | |
431 | mov dh,[esi+6] |
432 | mov bl,[esi+5] |
433 | |
434 | and edx,00011000000110000001100000011000b |
435 | mov bh,[esi+7] |
436 | |
437 | ror edx,16+3 |
438 | mov eax,ebx ; setup eax for reds |
439 | |
440 | and ebx,00000111000001110000011100000111b |
441 | and eax,11100000111000001110000011100000b ; reds |
442 | |
443 | ror ebx,16-2 |
444 | add esi,BYTE 8 |
445 | |
446 | ror eax,16 |
447 | add edi,BYTE 4 |
448 | |
449 | add eax,ebx |
450 | mov bl,[esi+1] ; greens |
451 | |
452 | add eax,edx |
453 | mov dl,[esi+0] ; blues |
454 | |
455 | mov [edi-4],eax |
456 | mov dh,[esi+2] |
457 | |
458 | dec ecx |
459 | jnz .L5 |
460 | |
461 | ; check tail |
462 | pop ecx |
463 | and ecx,BYTE 11b |
464 | jz .L7 |
465 | |
466 | .L6 ; tail |
467 | mov al,[esi+0] |
468 | mov ah,[esi+1] |
469 | mov ebx,eax |
470 | mov edx,eax |
471 | and eax,BYTE 11000b ; blue |
472 | shr eax,3 |
473 | and ebx,11100000000b ; green |
474 | shr ebx,6 |
475 | and edx,1110000000000000b ; red |
476 | shr edx,8 |
477 | add eax,ebx |
478 | add eax,edx |
479 | mov [edi],al |
480 | add esi,BYTE 2 |
481 | inc edi |
482 | dec ecx |
483 | jnz .L6 |
484 | |
485 | .L7 pop ebp |
486 | retn |
487 | |
488 | %ifidn __OUTPUT_FORMAT__,elf |
489 | section .note.GNU-stack noalloc noexec nowrite progbits |
490 | %endif |