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-rw-r--r--firmware/asm/arm/lcd-as-memframe.S591
1 files changed, 0 insertions, 591 deletions
diff --git a/firmware/asm/arm/lcd-as-memframe.S b/firmware/asm/arm/lcd-as-memframe.S
index 52ab0447c2..4bbae6fc0a 100644
--- a/firmware/asm/arm/lcd-as-memframe.S
+++ b/firmware/asm/arm/lcd-as-memframe.S
@@ -99,594 +99,3 @@ lcd_copy_buffer_rect: @
99 bgt 10b @ copy line @ 99 bgt 10b @ copy line @
100 ldmpc regs=r4-r11 @ restore regs and return 100 ldmpc regs=r4-r11 @ restore regs and return
101 .size lcd_copy_buffer_rect, .-lcd_copy_buffer_rect 101 .size lcd_copy_buffer_rect, .-lcd_copy_buffer_rect
102
103
104/****************************************************************************
105 * void lcd_write_yuv420_lines(fb_data *dst,
106 * unsigned char const * const src[3],
107 * int width,
108 * int stride);
109 *
110 * |R| |1.000000 -0.000001 1.402000| |Y'|
111 * |G| = |1.000000 -0.334136 -0.714136| |Pb|
112 * |B| |1.000000 1.772000 0.000000| |Pr|
113 * Scaled, normalized, rounded and tweaked to yield RGB 565:
114 * |R| |74 0 101| |Y' - 16| >> 9
115 * |G| = |74 -24 -51| |Cb - 128| >> 8
116 * |B| |74 128 0| |Cr - 128| >> 9
117 *
118 * Write four RGB565 pixels in the following order on each loop:
119 * 1 3 + > down
120 * 2 4 \/ left
121 */
122 .section .icode.lcd_write_yuv420_lines, "ax", %progbits
123 .align 2
124 .global lcd_write_yuv420_lines
125 .type lcd_write_yuv420_lines, %function
126lcd_write_yuv420_lines:
127 @ r0 = dst
128 @ r1 = yuv_src
129 @ r2 = width
130 @ r3 = stride
131 stmfd sp!, { r4-r10, lr } @ save non-scratch
132 ldmia r1, { r4, r5, r6 } @ r4 = yuv_src[0] = Y'_p
133 @ r5 = yuv_src[1] = Cb_p
134 @ r6 = yuv_src[2] = Cr_p
135 @ r1 = scratch
136 sub r3, r3, #1 @
13710: @ loop line @
138 ldrb r7, [r4], #1 @ r7 = *Y'_p++;
139 ldrb r8, [r5], #1 @ r8 = *Cb_p++;
140 ldrb r9, [r6], #1 @ r9 = *Cr_p++;
141 @
142 sub r7, r7, #16 @ r7 = Y = (Y' - 16)*74
143 add r12, r7, r7, asl #2 @ actually (Y' - 16)*37 and shift right
144 add r7, r12, r7, asl #5 @ by one less when adding - same for all
145 @
146 sub r8, r8, #128 @ Cb -= 128
147 sub r9, r9, #128 @ Cr -= 128
148 @
149 add r10, r9, r9, asl #1 @ r10 = Cr*51 + Cb*24
150 add r10, r10, r10, asl #4 @
151 add r10, r10, r8, asl #3 @
152 add r10, r10, r8, asl #4 @
153 @
154 add lr, r9, r9, asl #2 @ r9 = Cr*101
155 add lr, lr, r9, asl #5 @
156 add r9, lr, r9, asl #6 @
157 @
158 add r8, r8, #2 @ r8 = bu = (Cb*128 + 128) >> 8
159 mov r8, r8, asr #2 @
160 add r9, r9, #256 @ r9 = rv = (r9 + 256) >> 9
161 mov r9, r9, asr #9 @
162 rsb r10, r10, #128 @ r10 = guv = (-r10 + 128) >> 8
163 mov r10, r10, asr #8 @
164 @ compute R, G, and B
165 add r1, r8, r7, asr #8 @ r1 = b = (Y >> 9) + bu
166 add lr, r9, r7, asr #8 @ lr = r = (Y >> 9) + rv
167 add r7, r10, r7, asr #7 @ r7 = g = (Y >> 8) + guv
168 @
169#if ARM_ARCH >= 6
170 usat r1, #5, r1 @ clamp b
171 usat lr, #5, lr @ clamp r
172 usat r7, #6, r7 @ clamp g
173#else
174 orr r12, r1, lr @ check if clamping is needed...
175 orr r12, r12, r7, asr #1 @ ...at all
176 cmp r12, #31 @
177 bls 15f @ no clamp @
178 cmp r1, #31 @ clamp b
179 mvnhi r1, r1, asr #31 @
180 andhi r1, r1, #31 @
181 cmp lr, #31 @ clamp r
182 mvnhi lr, lr, asr #31 @
183 andhi lr, lr, #31 @
184 cmp r7, #63 @ clamp g
185 mvnhi r7, r7, asr #31 @
186 andhi r7, r7, #63 @
18715: @ no clamp @
188#endif
189 @
190 ldrb r12, [r4, r3] @ r12 = Y' = *(Y'_p + stride)
191 @
192 orr r1, r1, r7, lsl #5 @ r4 |= (g << 5)
193 orr r1, r1, lr, lsl #11 @ r4 = b | (r << 11)
194
195#if LCD_WIDTH >= LCD_HEIGHT
196 strh r1, [r0] @
197#elif LCD_WIDTH < 256
198 strh r1, [r0], #LCD_WIDTH @ store pixel
199#else
200 strh r1, [r0] @
201#endif
202 @
203 sub r7, r12, #16 @ r7 = Y = (Y' - 16)*74
204 add r12, r7, r7, asl #2 @
205 add r7, r12, r7, asl #5 @
206 @ compute R, G, and B
207 add r1, r8, r7, asr #8 @ r1 = b = (Y >> 9) + bu
208 add lr, r9, r7, asr #8 @ lr = r = (Y >> 9) + rv
209 add r7, r10, r7, asr #7 @ r7 = g = (Y >> 8) + guv
210 @
211#if ARM_ARCH >= 6
212 usat r1, #5, r1 @ clamp b
213 usat lr, #5, lr @ clamp r
214 usat r7, #6, r7 @ clamp g
215#else
216 orr r12, r1, lr @ check if clamping is needed...
217 orr r12, r12, r7, asr #1 @ ...at all
218 cmp r12, #31 @
219 bls 15f @ no clamp @
220 cmp r1, #31 @ clamp b
221 mvnhi r1, r1, asr #31 @
222 andhi r1, r1, #31 @
223 cmp lr, #31 @ clamp r
224 mvnhi lr, lr, asr #31 @
225 andhi lr, lr, #31 @
226 cmp r7, #63 @ clamp g
227 mvnhi r7, r7, asr #31 @
228 andhi r7, r7, #63 @
22915: @ no clamp @
230#endif
231 @
232 ldrb r12, [r4], #1 @ r12 = Y' = *(Y'_p++)
233 @
234 orr r1, r1, lr, lsl #11 @ r1 = b | (r << 11)
235 orr r1, r1, r7, lsl #5 @ r1 |= (g << 5)
236
237#if LCD_WIDTH >= LCD_HEIGHT
238 add r0, r0, #2*LCD_WIDTH @
239 strh r1, [r0] @ store pixel
240 sub r0, r0, #2*LCD_WIDTH @
241#elif LCD_WIDTH < 256
242 strh r1, [r0, #-LCD_WIDTH-2] @ store pixel
243#else
244 strh r1, [r0, #-2] @
245 add r0, r0, #LCD_WIDTH @
246#endif
247 @
248 sub r7, r12, #16 @ r7 = Y = (Y' - 16)*74
249 add r12, r7, r7, asl #2 @
250 add r7, r12, r7, asl #5 @
251 @ compute R, G, and B
252 add r1, r8, r7, asr #8 @ r1 = b = (Y >> 9) + bu
253 add lr, r9, r7, asr #8 @ lr = r = (Y >> 9) + rv
254 add r7, r10, r7, asr #7 @ r7 = g = (Y >> 8) + guv
255 @
256#if ARM_ARCH >= 6
257 usat r1, #5, r1 @ clamp b
258 usat lr, #5, lr @ clamp r
259 usat r7, #6, r7 @ clamp g
260#else
261 orr r12, r1, lr @ check if clamping is needed...
262 orr r12, r12, r7, asr #1 @ ...at all
263 cmp r12, #31 @
264 bls 15f @ no clamp @
265 cmp r1, #31 @ clamp b
266 mvnhi r1, r1, asr #31 @
267 andhi r1, r1, #31 @
268 cmp lr, #31 @ clamp r
269 mvnhi lr, lr, asr #31 @
270 andhi lr, lr, #31 @
271 cmp r7, #63 @ clamp g
272 mvnhi r7, r7, asr #31 @
273 andhi r7, r7, #63 @
27415: @ no clamp @
275#endif
276 @
277 ldrb r12, [r4, r3] @ r12 = Y' = *(Y'_p + stride)
278 @
279 orr r1, r1, r7, lsl #5 @ r1 = b | (g << 5)
280 orr r1, r1, lr, lsl #11 @ r1 |= (r << 11)
281
282#if LCD_WIDTH >= LCD_HEIGHT
283 strh r1, [r0, #2]
284#elif LCD_WIDTH < 256
285 strh r1, [r0, #LCD_WIDTH]! @ store pixel
286#else
287 strh r1, [r0] @
288#endif
289 @
290 sub r7, r12, #16 @ r7 = Y = (Y' - 16)*74
291 add r12, r7, r7, asl #2 @
292 add r7, r12, r7, asl #5 @
293 @ compute R, G, and B
294 add r1, r8, r7, asr #8 @ r1 = b = (Y >> 9) + bu
295 add lr, r9, r7, asr #8 @ lr = r = (Y >> 9) + rv
296 add r7, r10, r7, asr #7 @ r7 = g = (Y >> 8) + guv
297 @
298#if ARM_ARCH >= 6
299 usat r1, #5, r1 @ clamp b
300 usat lr, #5, lr @ clamp r
301 usat r7, #6, r7 @ clamp g
302#else
303 orr r12, r1, lr @ check if clamping is needed...
304 orr r12, r12, r7, asr #1 @ ...at all
305 cmp r12, #31 @
306 bls 15f @ no clamp @
307 cmp r1, #31 @ clamp b
308 mvnhi r1, r1, asr #31 @
309 andhi r1, r1, #31 @
310 cmp lr, #31 @ clamp r
311 mvnhi lr, lr, asr #31 @
312 andhi lr, lr, #31 @
313 cmp r7, #63 @ clamp g
314 mvnhi r7, r7, asr #31 @
315 andhi r7, r7, #63 @
31615: @ no clamp @
317#endif
318 @
319 orr r12, r1, lr, lsl #11 @ r12 = b | (r << 11)
320 orr r12, r12, r7, lsl #5 @ r12 |= (g << 5)
321
322#if LCD_WIDTH >= LCD_HEIGHT
323 add r0, r0, #2*LCD_WIDTH
324 strh r12, [r0, #2]
325#if LCD_WIDTH <= 512
326 sub r0, r0, #(2*LCD_WIDTH)-4
327#else
328 sub r0, r0, #(2*LCD_WIDTH)
329 add r0, r0, #4
330#endif
331#else
332 strh r12, [r0, #-2] @ store pixel
333#if LCD_WIDTH < 256
334 add r0, r0, #2*LCD_WIDTH @
335#else
336 add r0, r0, #LCD_WIDTH @
337#endif
338#endif
339 @
340 subs r2, r2, #2 @ subtract block from width
341 bgt 10b @ loop line @
342 @
343 ldmpc regs=r4-r10 @ restore registers and return
344 .ltorg @ dump constant pool
345 .size lcd_write_yuv420_lines, .-lcd_write_yuv420_lines
346
347
348/****************************************************************************
349 * void lcd_write_yuv420_lines_odither(fb_data *dst,
350 * unsigned char const * const src[3],
351 * int width,
352 * int stride,
353 * int x_screen,
354 * int y_screen);
355 *
356 * |R| |1.000000 -0.000001 1.402000| |Y'|
357 * |G| = |1.000000 -0.334136 -0.714136| |Pb|
358 * |B| |1.000000 1.772000 0.000000| |Pr|
359 * Red scaled at twice g & b but at same precision to place it in correct
360 * bit position after multiply and leave instruction count lower.
361 * |R| |258 0 408| |Y' - 16|
362 * |G| = |149 -49 -104| |Cb - 128|
363 * |B| |149 258 0| |Cr - 128|
364 *
365 * Write four RGB565 pixels in the following order on each loop:
366 * 1 3 + > down
367 * 2 4 \/ left
368 *
369 * Kernel pattern (raw|rotated|use order):
370 * 5 3 4 2 2 6 3 7 row0 row2 > down
371 * 1 7 0 6 | 4 0 5 1 | 2 4 6 0 3 5 7 1 col0 left
372 * 4 2 5 3 | 3 7 2 6 | 3 5 7 1 2 4 6 0 col2 \/
373 * 0 6 1 7 5 1 4 0
374 */
375 .section .icode.lcd_write_yuv420_lines_odither, "ax", %progbits
376 .align 2
377 .global lcd_write_yuv420_lines_odither
378 .type lcd_write_yuv420_lines_odither, %function
379lcd_write_yuv420_lines_odither:
380 @ r0 = dst
381 @ r1 = yuv_src
382 @ r2 = width
383 @ r3 = stride
384 @ [sp] = x_screen
385 @ [sp+4] = y_screen
386 stmfd sp!, { r4-r11, lr } @ save non-scratch
387 ldmia r1, { r4, r5, r6 } @ r4 = yuv_src[0] = Y'_p
388 @ r5 = yuv_src[1] = Cb_p
389 @ r6 = yuv_src[2] = Cr_p
390 @
391 sub r3, r3, #1 @
392 add r1, sp, #36 @ Line up pattern and kernel quadrant
393 ldmia r1, { r12, r14 } @
394 eor r14, r14, r12 @
395 and r14, r14, #0x2 @
396 mov r14, r14, lsl #6 @ 0x00 or 0x80
39710: @ loop line @
398 @
399 ldrb r7, [r4], #1 @ r7 = *Y'_p++;
400 ldrb r8, [r5], #1 @ r8 = *Cb_p++;
401 ldrb r9, [r6], #1 @ r9 = *Cr_p++;
402 @
403 eor r14, r14, #0x80 @ flip pattern quadrant
404 @
405 sub r7, r7, #16 @ r7 = Y = (Y' - 16)*149
406 add r12, r7, r7, asl #2 @
407 add r12, r12, r12, asl #4 @
408 add r7, r12, r7, asl #6 @
409 @
410 sub r8, r8, #128 @ Cb -= 128
411 sub r9, r9, #128 @ Cr -= 128
412 @
413 add r10, r8, r8, asl #4 @ r10 = guv = Cr*104 + Cb*49
414 add r10, r10, r8, asl #5 @
415 add r10, r10, r9, asl #3 @
416 add r10, r10, r9, asl #5 @
417 add r10, r10, r9, asl #6 @
418 @
419 mov r8, r8, asl #1 @ r8 = bu = Cb*258
420 add r8, r8, r8, asl #7 @
421 @
422 add r9, r9, r9, asl #1 @ r9 = rv = Cr*408
423 add r9, r9, r9, asl #4 @
424 mov r9, r9, asl #3 @
425 @
426 @ compute R, G, and B
427 add r1, r8, r7 @ r1 = b' = Y + bu
428 add r11, r9, r7, asl #1 @ r11 = r' = Y*2 + rv
429 rsb r7, r10, r7 @ r7 = g' = Y + guv
430 @
431 @ r8 = bu, r9 = rv, r10 = guv
432 @
433 sub r12, r1, r1, lsr #5 @ r1 = 31/32*b + b/256
434 add r1, r12, r1, lsr #8 @
435 @
436 sub r12, r11, r11, lsr #5 @ r11 = 31/32*r + r/256
437 add r11, r12, r11, lsr #8 @
438 @
439 sub r12, r7, r7, lsr #6 @ r7 = 63/64*g + g/256
440 add r7, r12, r7, lsr #8 @
441 @
442 add r12, r14, #0x100 @
443 @
444 add r1, r1, r12 @ b = r1 + delta
445 add r11, r11, r12, lsl #1 @ r = r11 + delta*2
446 add r7, r7, r12, lsr #1 @ g = r7 + delta/2
447 @
448#if ARM_ARCH >= 6
449 usat r11, #5, r11, asr #11 @ clamp r
450 usat r7, #6, r7, asr #9 @ clamp g
451 usat r1, #5, r1, asr #10 @ clamp b
452 @
453 ldrb r12, [r4, r3] @ r12 = Y' = *(Y'_p + stride)
454 @
455 orr r1, r1, r11, lsl #11 @ r1 = b | (r << 11)
456 orr r1, r1, r7, lsl #5 @ r1 |= (g << 5)
457#else
458 orr r12, r1, r11, asr #1 @ check if clamping is needed...
459 orr r12, r12, r7 @ ...at all
460 movs r12, r12, asr #15 @
461 beq 15f @ no clamp @
462 movs r12, r1, asr #15 @ clamp b
463 mvnne r1, r12, lsr #15 @
464 andne r1, r1, #0x7c00 @ mask b only if clamped
465 movs r12, r11, asr #16 @ clamp r
466 mvnne r11, r12, lsr #16 @
467 movs r12, r7, asr #15 @ clamp g
468 mvnne r7, r12, lsr #15 @
46915: @ no clamp @
470 @
471 ldrb r12, [r4, r3] @ r12 = Y' = *(Y'_p + stride)
472 @
473 and r11, r11, #0xf800 @ pack pixel
474 and r7, r7, #0x7e00 @ r1 = pixel = (r & 0xf800) |
475 orr r11, r11, r7, lsr #4 @ ((g & 0x7e00) >> 4) |
476 orr r1, r11, r1, lsr #10 @ (b >> 10)
477#endif
478 @
479#if LCD_WIDTH >= LCD_HEIGHT
480 strh r1, [r0] @
481#elif LCD_WIDTH < 256
482 strh r1, [r0], #LCD_WIDTH @ store pixel
483#else
484 strh r1, [r0] @
485#endif
486 @
487 sub r7, r12, #16 @ r7 = Y = (Y' - 16)*149
488 add r12, r7, r7, asl #2 @
489 add r12, r12, r12, asl #4 @
490 add r7, r12, r7, asl #6 @
491 @ compute R, G, and B
492 add r1, r8, r7 @ r1 = b' = Y + bu
493 add r11, r9, r7, asl #1 @ r11 = r' = Y*2 + rv
494 rsb r7, r10, r7 @ r7 = g' = Y + guv
495 @
496 sub r12, r1, r1, lsr #5 @ r1 = 31/32*b' + b'/256
497 add r1, r12, r1, lsr #8 @
498 @
499 sub r12, r11, r11, lsr #5 @ r11 = 31/32*r' + r'/256
500 add r11, r12, r11, lsr #8 @
501 @
502 sub r12, r7, r7, lsr #6 @ r7 = 63/64*g' + g'/256
503 add r7, r12, r7, lsr #8 @
504 @
505 add r12, r14, #0x200 @
506 @
507 add r1, r1, r12 @ b = r1 + delta
508 add r11, r11, r12, lsl #1 @ r = r11 + delta*2
509 add r7, r7, r12, lsr #1 @ g = r7 + delta/2
510 @
511#if ARM_ARCH >= 6
512 usat r11, #5, r11, asr #11 @ clamp r
513 usat r7, #6, r7, asr #9 @ clamp g
514 usat r1, #5, r1, asr #10 @ clamp b
515 @
516 ldrb r12, [r4], #1 @ r12 = Y' = *(Y'_p++)
517 @
518 orr r1, r1, r11, lsl #11 @ r1 = b | (r << 11)
519 orr r1, r1, r7, lsl #5 @ r1 |= (g << 5)
520#else
521 orr r12, r1, r11, asr #1 @ check if clamping is needed...
522 orr r12, r12, r7 @ ...at all
523 movs r12, r12, asr #15 @
524 beq 15f @ no clamp @
525 movs r12, r1, asr #15 @ clamp b
526 mvnne r1, r12, lsr #15 @
527 andne r1, r1, #0x7c00 @ mask b only if clamped
528 movs r12, r11, asr #16 @ clamp r
529 mvnne r11, r12, lsr #16 @
530 movs r12, r7, asr #15 @ clamp g
531 mvnne r7, r12, lsr #15 @
53215: @ no clamp @
533 @
534 ldrb r12, [r4], #1 @ r12 = Y' = *(Y'_p++)
535 @
536 and r11, r11, #0xf800 @ pack pixel
537 and r7, r7, #0x7e00 @ r1 = pixel = (r & 0xf800) |
538 orr r11, r11, r7, lsr #4 @ ((g & 0x7e00) >> 4) |
539 orr r1, r11, r1, lsr #10 @ (b >> 10)
540#endif
541 @
542#if LCD_WIDTH >= LCD_HEIGHT
543 add r0, r0, #2*LCD_WIDTH @
544 strh r1, [r0] @ store pixel
545 sub r0, r0, #2*LCD_WIDTH @
546#elif LCD_WIDTH < 256
547 strh r1, [r0, #-LCD_WIDTH-2] @ store pixel
548#else
549 strh r1, [r0, #-2] @ store pixel
550 add r0, r0, #LCD_WIDTH @
551#endif
552 @
553 sub r7, r12, #16 @ r7 = Y = (Y' - 16)*149
554 add r12, r7, r7, asl #2 @
555 add r12, r12, r12, asl #4 @
556 add r7, r12, r7, asl #6 @
557 @ compute R, G, and B
558 add r1, r8, r7 @ r1 = b' = Y + bu
559 add r11, r9, r7, asl #1 @ r11 = r' = Y*2 + rv
560 rsb r7, r10, r7 @ r7 = g' = Y + guv
561 @
562 @ r8 = bu, r9 = rv, r10 = guv
563 @
564 sub r12, r1, r1, lsr #5 @ r1 = 31/32*b' + b'/256
565 add r1, r12, r1, lsr #8 @
566 @
567 sub r12, r11, r11, lsr #5 @ r11 = 31/32*r' + r'/256
568 add r11, r12, r11, lsr #8 @
569 @
570 sub r12, r7, r7, lsr #6 @ r7 = 63/64*g' + g'/256
571 add r7, r12, r7, lsr #8 @
572 @
573 add r12, r14, #0x300 @
574 @
575 add r1, r1, r12 @ b = r1 + delta
576 add r11, r11, r12, lsl #1 @ r = r11 + delta*2
577 add r7, r7, r12, lsr #1 @ g = r7 + delta/2
578 @
579#if ARM_ARCH >= 6
580 usat r11, #5, r11, asr #11 @ clamp r
581 usat r7, #6, r7, asr #9 @ clamp g
582 usat r1, #5, r1, asr #10 @ clamp b
583 @
584 ldrb r12, [r4, r3] @ r12 = Y' = *(Y'_p + stride)
585 @
586 orr r1, r1, r11, lsl #11 @ r1 = b | (r << 11)
587 orr r1, r1, r7, lsl #5 @ r1 |= (g << 5)
588#else
589 orr r12, r1, r11, asr #1 @ check if clamping is needed...
590 orr r12, r12, r7 @ ...at all
591 movs r12, r12, asr #15 @
592 beq 15f @ no clamp @
593 movs r12, r1, asr #15 @ clamp b
594 mvnne r1, r12, lsr #15 @
595 andne r1, r1, #0x7c00 @ mask b only if clamped
596 movs r12, r11, asr #16 @ clamp r
597 mvnne r11, r12, lsr #16 @
598 movs r12, r7, asr #15 @ clamp g
599 mvnne r7, r12, lsr #15 @
60015: @ no clamp @
601 @
602 ldrb r12, [r4, r3] @ r12 = Y' = *(Y'_p + stride)
603 @
604 and r11, r11, #0xf800 @ pack pixel
605 and r7, r7, #0x7e00 @ r1 = pixel = (r & 0xf800) |
606 orr r11, r11, r7, lsr #4 @ ((g & 0x7e00) >> 4) |
607 orr r1, r11, r1, lsr #10 @ (b >> 10)
608#endif
609 @
610#if LCD_WIDTH >= LCD_HEIGHT
611 strh r1, [r0, #2]
612#elif LCD_WIDTH < 256
613 strh r1, [r0, #LCD_WIDTH]! @ store pixel
614#else
615 strh r1, [r0] @
616#endif
617
618 sub r7, r12, #16 @ r7 = Y = (Y' - 16)*149
619 add r12, r7, r7, asl #2 @
620 add r12, r12, r12, asl #4 @
621 add r7, r12, r7, asl #6 @
622 @ compute R, G, and B
623 add r1, r8, r7 @ r1 = b' = Y + bu
624 add r11, r9, r7, asl #1 @ r11 = r' = Y*2 + rv
625 rsb r7, r10, r7 @ r7 = g' = Y + guv
626 @
627 sub r12, r1, r1, lsr #5 @ r1 = 31/32*b + b/256
628 add r1, r12, r1, lsr #8 @
629 @
630 sub r12, r11, r11, lsr #5 @ r11 = 31/32*r + r/256
631 add r11, r12, r11, lsr #8 @
632 @
633 sub r12, r7, r7, lsr #6 @ r7 = 63/64*g + g/256
634 add r7, r12, r7, lsr #8 @
635 @
636 @ This element is zero - use r14 @
637 @
638 add r1, r1, r14 @ b = r1 + delta
639 add r11, r11, r14, lsl #1 @ r = r11 + delta*2
640 add r7, r7, r14, lsr #1 @ g = r7 + delta/2
641 @
642#if ARM_ARCH >= 6
643 usat r11, #5, r11, asr #11 @ clamp r
644 usat r7, #6, r7, asr #9 @ clamp g
645 usat r1, #5, r1, asr #10 @ clamp b
646 @
647 orr r1, r1, r11, lsl #11 @ r1 = b | (r << 11)
648 orr r1, r1, r7, lsl #5 @ r1 |= (g << 5)
649#else
650 orr r12, r1, r11, asr #1 @ check if clamping is needed...
651 orr r12, r12, r7 @ ...at all
652 movs r12, r12, asr #15 @
653 beq 15f @ no clamp @
654 movs r12, r1, asr #15 @ clamp b
655 mvnne r1, r12, lsr #15 @
656 andne r1, r1, #0x7c00 @ mask b only if clamped
657 movs r12, r11, asr #16 @ clamp r
658 mvnne r11, r12, lsr #16 @
659 movs r12, r7, asr #15 @ clamp g
660 mvnne r7, r12, lsr #15 @
66115: @ no clamp @
662 @
663 and r11, r11, #0xf800 @ pack pixel
664 and r7, r7, #0x7e00 @ r1 = pixel = (r & 0xf800) |
665 orr r11, r11, r7, lsr #4 @ ((g & 0x7e00) >> 4) |
666 orr r1, r11, r1, lsr #10 @ (b >> 10)
667#endif
668 @
669#if LCD_WIDTH >= LCD_HEIGHT
670 add r0, r0, #2*LCD_WIDTH
671 strh r1, [r0, #2] @ store pixel
672#if LCD_WIDTH <= 512
673 sub r0, r0, #(2*LCD_WIDTH)-4
674#else
675 sub r0, r0, #(2*LCD_WIDTH)
676 add r0, r0, #4
677#endif
678#else
679 strh r1, [r0, #-2] @ store pixel
680#if LCD_WIDTH < 256
681 add r0, r0, #2*LCD_WIDTH @
682#else
683 add r0, r0, #LCD_WIDTH @
684#endif
685#endif
686 @
687 subs r2, r2, #2 @ subtract block from width
688 bgt 10b @ loop line @
689 @
690 ldmpc regs=r4-r11 @ restore registers and return
691 .ltorg @ dump constant pool
692 .size lcd_write_yuv420_lines_odither, .-lcd_write_yuv420_lines_odither
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-07 17:41:52 +0000