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Diffstat (limited to 'firmware/target/arm/as3525/lcd-as-e200v2-fuze.S')
-rw-r--r-- | firmware/target/arm/as3525/lcd-as-e200v2-fuze.S | 500 |
1 files changed, 0 insertions, 500 deletions
diff --git a/firmware/target/arm/as3525/lcd-as-e200v2-fuze.S b/firmware/target/arm/as3525/lcd-as-e200v2-fuze.S deleted file mode 100644 index 2725c926a8..0000000000 --- a/firmware/target/arm/as3525/lcd-as-e200v2-fuze.S +++ /dev/null | |||
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1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Copyright (C) 2007 by Jens Arnold | ||
11 | * Heavily based on lcd-as-memframe.c by Michael Sevakis | ||
12 | * Adapted for Sansa Fuze/e200v2 by Rafaël Carré | ||
13 | * | ||
14 | * This program is free software; you can redistribute it and/or | ||
15 | * modify it under the terms of the GNU General Public License | ||
16 | * as published by the Free Software Foundation; either version 2 | ||
17 | * of the License, or (at your option) any later version. | ||
18 | * | ||
19 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
20 | * KIND, either express or implied. | ||
21 | * | ||
22 | ****************************************************************************/ | ||
23 | |||
24 | #include "config.h" | ||
25 | #include "cpu.h" | ||
26 | |||
27 | #define DBOP_BUSY (1<<10) | ||
28 | |||
29 | /**************************************************************************** | ||
30 | * void lcd_write_yuv_420_lines(unsigned char const * const src[3], | ||
31 | * int width, | ||
32 | * int stride); | ||
33 | * | ||
34 | * |R| |1.000000 -0.000001 1.402000| |Y'| | ||
35 | * |G| = |1.000000 -0.334136 -0.714136| |Pb| | ||
36 | * |B| |1.000000 1.772000 0.000000| |Pr| | ||
37 | * Scaled, normalized, rounded and tweaked to yield RGB 565: | ||
38 | * |R| |74 0 101| |Y' - 16| >> 9 | ||
39 | * |G| = |74 -24 -51| |Cb - 128| >> 8 | ||
40 | * |B| |74 128 0| |Cr - 128| >> 9 | ||
41 | * | ||
42 | * Write four RGB565 pixels in the following order on each loop: | ||
43 | * 1 3 + > down | ||
44 | * 2 4 \/ left | ||
45 | */ | ||
46 | .section .icode, "ax", %progbits | ||
47 | .align 2 | ||
48 | .global lcd_write_yuv420_lines | ||
49 | .type lcd_write_yuv420_lines, %function | ||
50 | lcd_write_yuv420_lines: | ||
51 | @ r0 = yuv_src | ||
52 | @ r1 = width | ||
53 | @ r2 = stride | ||
54 | stmfd sp!, { r4-r11, lr } @ save non-scratch | ||
55 | |||
56 | mov r3, #0xC8000000 @ | ||
57 | orr r3, r3, #0x120000 @ r3 = DBOP_BASE | ||
58 | |||
59 | ldmia r0, { r4, r5, r6 } @ r4 = yuv_src[0] = Y'_p | ||
60 | @ r5 = yuv_src[1] = Cb_p | ||
61 | @ r6 = yuv_src[2] = Cr_p | ||
62 | @ r0 = scratch | ||
63 | ldr r12, [r3, #8] @ | ||
64 | sub r2, r2, #1 @ stride -= 1 | ||
65 | orr r12, r12, #3<<13 @ | ||
66 | str r12, [r3, #8] @ DBOP_CTRL |= (1<<13|1<<14) (32bit mode) | ||
67 | 10: @ loop line @ | ||
68 | ldrb r7, [r4], #1 @ r7 = *Y'_p++; | ||
69 | ldrb r8, [r5], #1 @ r8 = *Cb_p++; | ||
70 | ldrb r9, [r6], #1 @ r9 = *Cr_p++; | ||
71 | @ | ||
72 | sub r7, r7, #16 @ r7 = Y = (Y' - 16)*74 | ||
73 | add r12, r7, r7, asl #2 @ actually (Y' - 16)*37 and shift right | ||
74 | add r7, r12, r7, asl #5 @ by one less when adding - same for all | ||
75 | @ | ||
76 | sub r8, r8, #128 @ Cb -= 128 | ||
77 | sub r9, r9, #128 @ Cr -= 128 | ||
78 | @ | ||
79 | add r10, r9, r9, asl #1 @ r10 = Cr*51 + Cb*24 | ||
80 | add r10, r10, r10, asl #4 @ | ||
81 | add r10, r10, r8, asl #3 @ | ||
82 | add r10, r10, r8, asl #4 @ | ||
83 | @ | ||
84 | add lr, r9, r9, asl #2 @ r9 = Cr*101 | ||
85 | add lr, lr, r9, asl #5 @ | ||
86 | add r9, lr, r9, asl #6 @ | ||
87 | @ | ||
88 | add r8, r8, #2 @ r8 = bu = (Cb*128 + 128) >> 8 | ||
89 | mov r8, r8, asr #2 @ | ||
90 | add r9, r9, #256 @ r9 = rv = (r9 + 256) >> 9 | ||
91 | mov r9, r9, asr #9 @ | ||
92 | rsb r10, r10, #128 @ r10 = guv = (-r10 + 128) >> 8 | ||
93 | mov r10, r10, asr #8 @ | ||
94 | @ compute R, G, and B | ||
95 | add r0, r8, r7, asr #8 @ r0 = b = (Y >> 9) + bu | ||
96 | add lr, r9, r7, asr #8 @ lr = r = (Y >> 9) + rv | ||
97 | add r7, r10, r7, asr #7 @ r7 = g = (Y >> 8) + guv | ||
98 | @ | ||
99 | orr r12, r0, lr @ check if clamping is needed... | ||
100 | orr r12, r12, r7, asr #1 @ ...at all | ||
101 | cmp r12, #31 @ | ||
102 | bls 15f @ no clamp @ | ||
103 | cmp r0, #31 @ clamp b | ||
104 | mvnhi r0, r0, asr #31 @ | ||
105 | andhi r0, r0, #31 @ | ||
106 | cmp lr, #31 @ clamp r | ||
107 | mvnhi lr, lr, asr #31 @ | ||
108 | andhi lr, lr, #31 @ | ||
109 | cmp r7, #63 @ clamp g | ||
110 | mvnhi r7, r7, asr #31 @ | ||
111 | andhi r7, r7, #63 @ | ||
112 | 15: @ no clamp @ | ||
113 | @ | ||
114 | ldrb r12, [r4, r2] @ r12 = Y' = *(Y'_p + stride) | ||
115 | @ | ||
116 | orr r0, r0, lr, lsl #11 @ r0 = (r << 11) | b | ||
117 | orr r11, r0, r7, lsl #5 @ r0 = (r << 11) | (g << 5) | b | ||
118 | @ | ||
119 | sub r7, r12, #16 @ r7 = Y = (Y' - 16)*74 | ||
120 | add r12, r7, r7, asl #2 @ | ||
121 | add r7, r12, r7, asl #5 @ | ||
122 | @ compute R, G, and B | ||
123 | add r0, r8, r7, asr #8 @ r0 = b = (Y >> 9) + bu | ||
124 | add lr, r9, r7, asr #8 @ lr = r = (Y >> 9) + rv | ||
125 | add r7, r10, r7, asr #7 @ r7 = g = (Y >> 8) + guv | ||
126 | @ | ||
127 | orr r12, r0, lr @ check if clamping is needed... | ||
128 | orr r12, r12, r7, asr #1 @ ...at all | ||
129 | cmp r12, #31 @ | ||
130 | bls 15f @ no clamp @ | ||
131 | cmp r0, #31 @ clamp b | ||
132 | mvnhi r0, r0, asr #31 @ | ||
133 | andhi r0, r0, #31 @ | ||
134 | cmp lr, #31 @ clamp r | ||
135 | mvnhi lr, lr, asr #31 @ | ||
136 | andhi lr, lr, #31 @ | ||
137 | cmp r7, #63 @ clamp g | ||
138 | mvnhi r7, r7, asr #31 @ | ||
139 | andhi r7, r7, #63 @ | ||
140 | 15: @ no clamp @ | ||
141 | @ | ||
142 | ldrb r12, [r4], #1 @ r12 = Y' = *(Y'_p++) | ||
143 | @ | ||
144 | orr r0, r0, lr, lsl #11 @ r0 = (r << 11) | b | ||
145 | orr r0, r0, r7, lsl #5 @ r0 = (r << 11) | (g << 5) | b | ||
146 | orr r0, r11, r0, lsl#16 @ pack with 2nd pixel | ||
147 | str r0, [r3, #0x10] @ write pixel | ||
148 | @ | ||
149 | sub r7, r12, #16 @ r7 = Y = (Y' - 16)*74 | ||
150 | add r12, r7, r7, asl #2 @ | ||
151 | add r7, r12, r7, asl #5 @ | ||
152 | @ compute R, G, and B | ||
153 | add r0, r8, r7, asr #8 @ r0 = b = (Y >> 9) + bu | ||
154 | add lr, r9, r7, asr #8 @ lr = r = (Y >> 9) + rv | ||
155 | add r7, r10, r7, asr #7 @ r7 = g = (Y >> 8) + guv | ||
156 | @ | ||
157 | orr r12, r0, lr @ check if clamping is needed... | ||
158 | orr r12, r12, r7, asr #1 @ ...at all | ||
159 | cmp r12, #31 @ | ||
160 | bls 15f @ no clamp @ | ||
161 | cmp r0, #31 @ clamp b | ||
162 | mvnhi r0, r0, asr #31 @ | ||
163 | andhi r0, r0, #31 @ | ||
164 | cmp lr, #31 @ clamp r | ||
165 | mvnhi lr, lr, asr #31 @ | ||
166 | andhi lr, lr, #31 @ | ||
167 | cmp r7, #63 @ clamp g | ||
168 | mvnhi r7, r7, asr #31 @ | ||
169 | andhi r7, r7, #63 @ | ||
170 | 15: @ no clamp @ | ||
171 | @ | ||
172 | ldrb r12, [r4, r2] @ r12 = Y' = *(Y'_p + stride) | ||
173 | @ | ||
174 | @ | ||
175 | orr r0, r0, lr, lsl #11 @ r0 = (r << 11) | b | ||
176 | orr r11, r0, r7, lsl #5 @ r0 = (r << 11) | (g << 5) | b | ||
177 | @ | ||
178 | sub r7, r12, #16 @ r7 = Y = (Y' - 16)*74 | ||
179 | add r12, r7, r7, asl #2 @ | ||
180 | add r7, r12, r7, asl #5 @ | ||
181 | @ compute R, G, and B | ||
182 | add r0, r8, r7, asr #8 @ r0 = b = (Y >> 9) + bu | ||
183 | add lr, r9, r7, asr #8 @ lr = r = (Y >> 9) + rv | ||
184 | add r7, r10, r7, asr #7 @ r7 = g = (Y >> 8) + guv | ||
185 | @ | ||
186 | orr r12, r0, lr @ check if clamping is needed... | ||
187 | orr r12, r12, r7, asr #1 @ ...at all | ||
188 | cmp r12, #31 @ | ||
189 | bls 15f @ no clamp @ | ||
190 | cmp r0, #31 @ clamp b | ||
191 | mvnhi r0, r0, asr #31 @ | ||
192 | andhi r0, r0, #31 @ | ||
193 | cmp lr, #31 @ clamp r | ||
194 | mvnhi lr, lr, asr #31 @ | ||
195 | andhi lr, lr, #31 @ | ||
196 | cmp r7, #63 @ clamp g | ||
197 | mvnhi r7, r7, asr #31 @ | ||
198 | andhi r7, r7, #63 @ | ||
199 | 15: @ no clamp @ | ||
200 | @ | ||
201 | orr r0, r0, lr, lsl #11 @ r0 = (r << 11) | b | ||
202 | orr r0, r0, r7, lsl #5 @ r0 = (r << 11) | (g << 5) | b | ||
203 | orr r0, r11, r0, lsl#16 @ pack with 2nd pixel | ||
204 | str r0, [r3, #0x10] @ write pixel | ||
205 | @ | ||
206 | subs r1, r1, #2 @ subtract block from width | ||
207 | bgt 10b @ loop line @ | ||
208 | @ | ||
209 | 1: @ busy | ||
210 | @ writing at max 110*32 its (LCD_WIDTH/2), the fifo is bigger | ||
211 | @ so polling fifo empty after the loops is save | ||
212 | ldr r7, [r3,#0xc] @ r7 = DBOP_STATUS | ||
213 | tst r7, #DBOP_BUSY @ fifo not empty? | ||
214 | beq 1b @ | ||
215 | |||
216 | ldmfd sp!, { r4-r11, pc } @ restore registers and return | ||
217 | bx lr @ | ||
218 | .ltorg @ dump constant pool | ||
219 | .size lcd_write_yuv420_lines, .-lcd_write_yuv420_lines | ||
220 | |||
221 | /**************************************************************************** | ||
222 | * void lcd_write_yuv_420_lines_odither(unsigned char const * const src[3], | ||
223 | * int width, | ||
224 | * int stride, | ||
225 | * int x_screen, | ||
226 | * int y_screen); | ||
227 | * | ||
228 | * |R| |1.000000 -0.000001 1.402000| |Y'| | ||
229 | * |G| = |1.000000 -0.334136 -0.714136| |Pb| | ||
230 | * |B| |1.000000 1.772000 0.000000| |Pr| | ||
231 | * Red scaled at twice g & b but at same precision to place it in correct | ||
232 | * bit position after multiply and leave instruction count lower. | ||
233 | * |R| |258 0 408| |Y' - 16| | ||
234 | * |G| = |149 -49 -104| |Cb - 128| | ||
235 | * |B| |149 258 0| |Cr - 128| | ||
236 | * | ||
237 | * Write four RGB565 pixels in the following order on each loop: | ||
238 | * 1 3 + > down | ||
239 | * 2 4 \/ left | ||
240 | * | ||
241 | * Kernel pattern (raw|rotated|use order): | ||
242 | * 5 3 4 2 2 6 3 7 row0 row2 > down | ||
243 | * 1 7 0 6 | 4 0 5 1 | 2 4 6 0 3 5 7 1 col0 left | ||
244 | * 4 2 5 3 | 3 7 2 6 | 3 5 7 1 2 4 6 0 col2 \/ | ||
245 | * 0 6 1 7 5 1 4 0 | ||
246 | */ | ||
247 | .section .icode, "ax", %progbits | ||
248 | .align 2 | ||
249 | .global lcd_write_yuv420_lines_odither | ||
250 | .type lcd_write_yuv420_lines_odither, %function | ||
251 | lcd_write_yuv420_lines_odither: | ||
252 | @ r0 = yuv_src | ||
253 | @ r1 = width | ||
254 | @ r2 = stride | ||
255 | @ r3 = x_screen | ||
256 | @ [sp] = y_screen | ||
257 | stmfd sp!, { r4-r11, lr } @ save non-scratch | ||
258 | ldmia r0, { r4, r5, r6 } @ r4 = yuv_src[0] = Y'_p | ||
259 | @ r5 = yuv_src[1] = Cb_p | ||
260 | @ r6 = yuv_src[2] = Cr_p | ||
261 | @ | ||
262 | ldr r14, [sp, #40] @ Line up pattern and kernel quadrant | ||
263 | sub r2, r2, #1 @ stride =- 1 | ||
264 | eor r14, r14, r3 @ | ||
265 | and r14, r14, #0x2 @ | ||
266 | mov r14, r14, lsl #6 @ 0x00 or 0x80 | ||
267 | |||
268 | mov r3, #0xC8000000 @ | ||
269 | orr r3, r3, #0x120000 @ r3 = DBOP_BASE, need to be redone | ||
270 | @ due to lack of registers | ||
271 | ldr r12, [r3, #8] @ | ||
272 | orr r12, r12, #3<<13 @ DBOP_CTRL |= (1<<13|1<<14) | ||
273 | str r12, [r3, #8] @ (32bit mode) | ||
274 | 10: @ loop line @ | ||
275 | @ | ||
276 | ldrb r7, [r4], #1 @ r7 = *Y'_p++; | ||
277 | ldrb r8, [r5], #1 @ r8 = *Cb_p++; | ||
278 | ldrb r9, [r6], #1 @ r9 = *Cr_p++; | ||
279 | @ | ||
280 | eor r14, r14, #0x80 @ flip pattern quadrant | ||
281 | @ | ||
282 | sub r7, r7, #16 @ r7 = Y = (Y' - 16)*149 | ||
283 | add r12, r7, r7, asl #2 @ | ||
284 | add r12, r12, r12, asl #4 @ | ||
285 | add r7, r12, r7, asl #6 @ | ||
286 | @ | ||
287 | sub r8, r8, #128 @ Cb -= 128 | ||
288 | sub r9, r9, #128 @ Cr -= 128 | ||
289 | @ | ||
290 | add r10, r8, r8, asl #4 @ r10 = guv = Cr*104 + Cb*49 | ||
291 | add r10, r10, r8, asl #5 @ | ||
292 | add r10, r10, r9, asl #3 @ | ||
293 | add r10, r10, r9, asl #5 @ | ||
294 | add r10, r10, r9, asl #6 @ | ||
295 | @ | ||
296 | mov r8, r8, asl #1 @ r8 = bu = Cb*258 | ||
297 | add r8, r8, r8, asl #7 @ | ||
298 | @ | ||
299 | add r9, r9, r9, asl #1 @ r9 = rv = Cr*408 | ||
300 | add r9, r9, r9, asl #4 @ | ||
301 | mov r9, r9, asl #3 @ | ||
302 | @ | ||
303 | @ compute R, G, and B | ||
304 | add r0, r8, r7 @ r0 = b' = Y + bu | ||
305 | add r11, r9, r7, asl #1 @ r11 = r' = Y*2 + rv | ||
306 | rsb r7, r10, r7 @ r7 = g' = Y + guv | ||
307 | @ | ||
308 | @ r8 = bu, r9 = rv, r10 = guv | ||
309 | @ | ||
310 | sub r12, r0, r0, lsr #5 @ r0 = 31/32*b + b/256 | ||
311 | add r0, r12, r0, lsr #8 @ | ||
312 | @ | ||
313 | sub r12, r11, r11, lsr #5 @ r11 = 31/32*r + r/256 | ||
314 | add r11, r12, r11, lsr #8 @ | ||
315 | @ | ||
316 | sub r12, r7, r7, lsr #6 @ r7 = 63/64*g + g/256 | ||
317 | add r7, r12, r7, lsr #8 @ | ||
318 | @ | ||
319 | add r12, r14, #0x100 @ | ||
320 | @ | ||
321 | add r0, r0, r12 @ b = r0 + delta | ||
322 | add r11, r11, r12, lsl #1 @ r = r11 + delta*2 | ||
323 | add r7, r7, r12, lsr #1 @ g = r7 + delta/2 | ||
324 | @ | ||
325 | orr r12, r0, r11, asr #1 @ check if clamping is needed... | ||
326 | orr r12, r12, r7 @ ...at all | ||
327 | movs r12, r12, asr #15 @ | ||
328 | beq 15f @ no clamp @ | ||
329 | movs r12, r0, asr #15 @ clamp b | ||
330 | mvnne r0, r12, lsr #15 @ | ||
331 | andne r0, r0, #0x7c00 @ mask b only if clamped | ||
332 | movs r12, r11, asr #16 @ clamp r | ||
333 | mvnne r11, r12, lsr #16 @ | ||
334 | movs r12, r7, asr #15 @ clamp g | ||
335 | mvnne r7, r12, lsr #15 @ | ||
336 | 15: @ no clamp @ | ||
337 | @ | ||
338 | ldrb r12, [r4, r2] @ r12 = Y' = *(Y'_p + stride) | ||
339 | @ | ||
340 | and r11, r11, #0xf800 @ pack pixel | ||
341 | and r7, r7, #0x7e00 @ r0 = pixel = (r & 0xf800) | | ||
342 | orr r11, r11, r7, lsr #4 @ ((g & 0x7e00) >> 4) | | ||
343 | orr r3, r11, r0, lsr #10 @ (b >> 10) | ||
344 | @ save pixel | ||
345 | sub r7, r12, #16 @ r7 = Y = (Y' - 16)*149 | ||
346 | add r12, r7, r7, asl #2 @ | ||
347 | add r12, r12, r12, asl #4 @ | ||
348 | add r7, r12, r7, asl #6 @ | ||
349 | @ compute R, G, and B | ||
350 | add r0, r8, r7 @ r0 = b' = Y + bu | ||
351 | add r11, r9, r7, asl #1 @ r11 = r' = Y*2 + rv | ||
352 | rsb r7, r10, r7 @ r7 = g' = Y + guv | ||
353 | @ | ||
354 | sub r12, r0, r0, lsr #5 @ r0 = 31/32*b' + b'/256 | ||
355 | add r0, r12, r0, lsr #8 @ | ||
356 | @ | ||
357 | sub r12, r11, r11, lsr #5 @ r11 = 31/32*r' + r'/256 | ||
358 | add r11, r12, r11, lsr #8 @ | ||
359 | @ | ||
360 | sub r12, r7, r7, lsr #6 @ r7 = 63/64*g' + g'/256 | ||
361 | add r7, r12, r7, lsr #8 @ | ||
362 | @ | ||
363 | add r12, r14, #0x200 @ | ||
364 | @ | ||
365 | add r0, r0, r12 @ b = r0 + delta | ||
366 | add r11, r11, r12, lsl #1 @ r = r11 + delta*2 | ||
367 | add r7, r7, r12, lsr #1 @ g = r7 + delta/2 | ||
368 | @ | ||
369 | orr r12, r0, r11, asr #1 @ check if clamping is needed... | ||
370 | orr r12, r12, r7 @ ...at all | ||
371 | movs r12, r12, asr #15 @ | ||
372 | beq 15f @ no clamp @ | ||
373 | movs r12, r0, asr #15 @ clamp b | ||
374 | mvnne r0, r12, lsr #15 @ | ||
375 | andne r0, r0, #0x7c00 @ mask b only if clamped | ||
376 | movs r12, r11, asr #16 @ clamp r | ||
377 | mvnne r11, r12, lsr #16 @ | ||
378 | movs r12, r7, asr #15 @ clamp g | ||
379 | mvnne r7, r12, lsr #15 @ | ||
380 | 15: @ no clamp @ | ||
381 | @ | ||
382 | ldrb r12, [r4], #1 @ r12 = Y' = *(Y'_p++) | ||
383 | |||
384 | and r11, r11, #0xf800 @ pack pixel | ||
385 | and r7, r7, #0x7e00 @ r0 = pixel = (r & 0xf800) | | ||
386 | orr r11, r11, r7, lsr #4 @ ((g & 0x7e00) >> 4) | | ||
387 | orr r0, r11, r0, lsr #10 @ (b >> 10) | ||
388 | orr r3, r3, r0, lsl#16 @ pack with 2nd pixel | ||
389 | mov r0, #0xC8000000 @ | ||
390 | orr r0, r0, #0x120000 @ r3 = DBOP_BASE | ||
391 | |||
392 | str r3, [r0, #0x10] @ write pixel | ||
393 | @ | ||
394 | sub r7, r12, #16 @ r7 = Y = (Y' - 16)*149 | ||
395 | add r12, r7, r7, asl #2 @ | ||
396 | add r12, r12, r12, asl #4 @ | ||
397 | add r7, r12, r7, asl #6 @ | ||
398 | @ compute R, G, and B | ||
399 | add r0, r8, r7 @ r0 = b' = Y + bu | ||
400 | add r11, r9, r7, asl #1 @ r11 = r' = Y*2 + rv | ||
401 | rsb r7, r10, r7 @ r7 = g' = Y + guv | ||
402 | @ | ||
403 | @ r8 = bu, r9 = rv, r10 = guv | ||
404 | @ | ||
405 | sub r12, r0, r0, lsr #5 @ r0 = 31/32*b' + b'/256 | ||
406 | add r0, r12, r0, lsr #8 @ | ||
407 | @ | ||
408 | sub r12, r11, r11, lsr #5 @ r11 = 31/32*r' + r'/256 | ||
409 | add r11, r12, r11, lsr #8 @ | ||
410 | @ | ||
411 | sub r12, r7, r7, lsr #6 @ r7 = 63/64*g' + g'/256 | ||
412 | add r7, r12, r7, lsr #8 @ | ||
413 | @ | ||
414 | add r12, r14, #0x300 @ | ||
415 | @ | ||
416 | add r0, r0, r12 @ b = r0 + delta | ||
417 | add r11, r11, r12, lsl #1 @ r = r11 + delta*2 | ||
418 | add r7, r7, r12, lsr #1 @ g = r7 + delta/2 | ||
419 | @ | ||
420 | orr r12, r0, r11, asr #1 @ check if clamping is needed... | ||
421 | orr r12, r12, r7 @ ...at all | ||
422 | movs r12, r12, asr #15 @ | ||
423 | beq 15f @ no clamp @ | ||
424 | movs r12, r0, asr #15 @ clamp b | ||
425 | mvnne r0, r12, lsr #15 @ | ||
426 | andne r0, r0, #0x7c00 @ mask b only if clamped | ||
427 | movs r12, r11, asr #16 @ clamp r | ||
428 | mvnne r11, r12, lsr #16 @ | ||
429 | movs r12, r7, asr #15 @ clamp g | ||
430 | mvnne r7, r12, lsr #15 @ | ||
431 | 15: @ no clamp @ | ||
432 | @ | ||
433 | ldrb r12, [r4, r2] @ r12 = Y' = *(Y'_p + stride) | ||
434 | @ | ||
435 | and r11, r11, #0xf800 @ pack pixel | ||
436 | and r7, r7, #0x7e00 @ r0 = pixel = (r & 0xf800) | | ||
437 | orr r11, r11, r7, lsr #4 @ ((g & 0x7e00) >> 4) | | ||
438 | orr r3, r11, r0, lsr #10 @ (b >> 10) | ||
439 | @ save pixel | ||
440 | @ | ||
441 | sub r7, r12, #16 @ r7 = Y = (Y' - 16)*149 | ||
442 | add r12, r7, r7, asl #2 @ | ||
443 | add r12, r12, r12, asl #4 @ | ||
444 | add r7, r12, r7, asl #6 @ | ||
445 | @ compute R, G, and B | ||
446 | add r0, r8, r7 @ r0 = b' = Y + bu | ||
447 | add r11, r9, r7, asl #1 @ r11 = r' = Y*2 + rv | ||
448 | rsb r7, r10, r7 @ r7 = g' = Y + guv | ||
449 | @ | ||
450 | sub r12, r0, r0, lsr #5 @ r0 = 31/32*b + b/256 | ||
451 | add r0, r12, r0, lsr #8 @ | ||
452 | @ | ||
453 | sub r12, r11, r11, lsr #5 @ r11 = 31/32*r + r/256 | ||
454 | add r11, r12, r11, lsr #8 @ | ||
455 | @ | ||
456 | sub r12, r7, r7, lsr #6 @ r7 = 63/64*g + g/256 | ||
457 | add r7, r12, r7, lsr #8 @ | ||
458 | @ | ||
459 | @ This element is zero - use r14 @ | ||
460 | @ | ||
461 | add r0, r0, r14 @ b = r0 + delta | ||
462 | add r11, r11, r14, lsl #1 @ r = r11 + delta*2 | ||
463 | add r7, r7, r14, lsr #1 @ g = r7 + delta/2 | ||
464 | @ | ||
465 | orr r12, r0, r11, asr #1 @ check if clamping is needed... | ||
466 | orr r12, r12, r7 @ ...at all | ||
467 | movs r12, r12, asr #15 @ | ||
468 | beq 15f @ no clamp @ | ||
469 | movs r12, r0, asr #15 @ clamp b | ||
470 | mvnne r0, r12, lsr #15 @ | ||
471 | andne r0, r0, #0x7c00 @ mask b only if clamped | ||
472 | movs r12, r11, asr #16 @ clamp r | ||
473 | mvnne r11, r12, lsr #16 @ | ||
474 | movs r12, r7, asr #15 @ clamp g | ||
475 | mvnne r7, r12, lsr #15 @ | ||
476 | 15: @ no clamp @ | ||
477 | @ | ||
478 | and r11, r11, #0xf800 @ pack pixel | ||
479 | and r7, r7, #0x7e00 @ r0 = pixel = (r & 0xf800) | | ||
480 | orr r11, r11, r7, lsr #4 @ ((g & 0x7e00) >> 4) | | ||
481 | orr r0, r11, r0, lsr #10 @ (b >> 10) | ||
482 | orr r3, r3, r0, lsl#16 @ pack with 2nd pixel | ||
483 | mov r0, #0xC8000000 @ | ||
484 | orr r0, r0, #0x120000 @ r3 = DBOP_BASE | ||
485 | |||
486 | str r3, [r0, #0x10] @ write pixel | ||
487 | @ | ||
488 | subs r1, r1, #2 @ subtract block from width | ||
489 | bgt 10b @ loop line @ | ||
490 | @ | ||
491 | 1: @ busy @ | ||
492 | @ writing at max 110*32 its (LCD_WIDTH/2), the fifo is bigger | ||
493 | @ so polling fifo empty after the loops is save | ||
494 | ldr r7, [r0,#0xc] @ r7 = DBOP_STATUS | ||
495 | tst r7, #DBOP_BUSY @ fifo not empty? | ||
496 | beq 1b @ | ||
497 | |||
498 | ldmfd sp!, { r4-r11, pc } @ restore registers and return | ||
499 | .ltorg @ dump constant pool | ||
500 | .size lcd_write_yuv420_lines_odither, .-lcd_write_yuv420_lines_odither | ||