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Diffstat (limited to 'firmware/target/arm/sandisk/sansa-e200/lcd-as-e200.S')
-rw-r--r-- | firmware/target/arm/sandisk/sansa-e200/lcd-as-e200.S | 279 |
1 files changed, 0 insertions, 279 deletions
diff --git a/firmware/target/arm/sandisk/sansa-e200/lcd-as-e200.S b/firmware/target/arm/sandisk/sansa-e200/lcd-as-e200.S deleted file mode 100644 index 4926c7fa79..0000000000 --- a/firmware/target/arm/sandisk/sansa-e200/lcd-as-e200.S +++ /dev/null | |||
@@ -1,279 +0,0 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Copyright (C) 2007 by Michael Sevakis | ||
11 | * | ||
12 | * All files in this archive are subject to the GNU General Public License. | ||
13 | * See the file COPYING in the source tree root for full license agreement. | ||
14 | * | ||
15 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
16 | * KIND, either express or implied. | ||
17 | * | ||
18 | ****************************************************************************/ | ||
19 | |||
20 | #include "config.h" | ||
21 | #include "cpu.h" | ||
22 | |||
23 | /**************************************************************************** | ||
24 | * void lcd_copy_buffer_rect(fb_data *dst, fb_data *src, int width, | ||
25 | * int height); | ||
26 | */ | ||
27 | .section .icode, "ax", %progbits | ||
28 | .align 2 | ||
29 | .global lcd_copy_buffer_rect | ||
30 | .type lcd_copy_buffer_rect, %function | ||
31 | @ r0 = dst | ||
32 | @ r1 = src | ||
33 | @ r2 = width | ||
34 | @ r3 = height | ||
35 | lcd_copy_buffer_rect: @ | ||
36 | stmfd sp!, { r4-r12, lr } @ save non-scratch regs | ||
37 | mov r5, r2 @ r5 = cached width | ||
38 | rsb r4, r2, #LCD_WIDTH @ r4 = LCD_WIDTH - width | ||
39 | 10: @ copy line @ | ||
40 | subs r2, r5, #1 @ r2 = width - 1 | ||
41 | beq 40f @ finish line @ one halfword? skip to trailing copy | ||
42 | tst r0, #2 @ word aligned? | ||
43 | beq 20f @ rem copy @ yes? skip to word copy | ||
44 | ldrh r6, [r1], #2 @ copy leading halfword | ||
45 | subs r2, r2, #1 @ | ||
46 | strh r6, [r0], #2 @ | ||
47 | ble 40f @ finish line @ next line if lt or finish | ||
48 | @ trailing halfword if eq | ||
49 | 20: @ rem copy @ | ||
50 | add r14, r2, #1 @ get remaining width mod 16 after word | ||
51 | @ align (rw) | ||
52 | and r14, r14, #0xe @ r14 = 0 (16), 2, 4, 6, 8, 10, 12, 14 | ||
53 | add pc, pc, r14, lsl #3 @ branch to 32-byte align | ||
54 | nop @ | ||
55 | b 30f @ rw % 16 = 0 or 1? use octword loop | ||
56 | nop @ | ||
57 | nop @ | ||
58 | nop @ | ||
59 | ldr r6, [r1], #4 @ rw % 16 = 2 or 3 | ||
60 | subs r2, r2, #2 @ | ||
61 | str r6, [r0], #4 @ | ||
62 | b 25f @ copy up done @ | ||
63 | ldmia r1!, { r6-r7 } @ rw % 16 = 4 or 5 | ||
64 | subs r2, r2, #4 @ | ||
65 | stmia r0!, { r6-r7 } @ | ||
66 | b 25f @ copy up done @ | ||
67 | ldmia r1!, { r6-r8 } @ rw % 16 = 6 or 7 | ||
68 | subs r2, r2, #6 @ | ||
69 | stmia r0!, { r6-r8 } @ | ||
70 | b 25f @ copy up done @ | ||
71 | ldmia r1!, { r6-r9 } @ rw % 16 = 8 or 9 | ||
72 | subs r2, r2, #8 @ | ||
73 | stmia r0!, { r6-r9 } @ | ||
74 | b 25f @ copy up done @ | ||
75 | ldmia r1!, { r6-r10 } @ rw % 16 = 10 or 11 | ||
76 | subs r2, r2, #10 @ | ||
77 | stmia r0!, { r6-r10 } @ | ||
78 | b 25f @ copy up done @ | ||
79 | ldmia r1!, { r6-r11 } @ rw % 16 = 12 or 13 | ||
80 | subs r2, r2, #12 @ | ||
81 | stmia r0!, { r6-r11 } @ | ||
82 | b 25f @ copy up done @ | ||
83 | ldmia r1!, { r6-r12 } @ rw % 16 = 14 or 15 | ||
84 | subs r2, r2, #14 @ | ||
85 | stmia r0!, { r6-r12 } @ | ||
86 | 25: @ copy up done @ | ||
87 | ble 40f @ finish line @ no 32-byte segments remaining? | ||
88 | 30: @ octword loop @ copy 16 pixels per loop | ||
89 | ldmia r1!, { r6-r12, r14 } @ | ||
90 | subs r2, r2, #16 @ | ||
91 | stmia r0!, { r6-r12, r14 } @ | ||
92 | bgt 30b @ octword loop @ | ||
93 | 40: @ finish line @ | ||
94 | ldreqh r6, [r1], #2 @ finish last halfword if eq ... | ||
95 | add r1, r1, r4, lsl #1 @ | ||
96 | streqh r6, [r0], #2 @ ... | ||
97 | add r0, r0, r4, lsl #1 @ | ||
98 | subs r3, r3, #1 @ next line | ||
99 | bgt 10b @ copy line @ | ||
100 | ldmfd sp!, { r4-r12, pc } @ restore regs and return | ||
101 | .size lcd_copy_buffer_rect, .-lcd_copy_buffer_rect | ||
102 | |||
103 | |||
104 | /**************************************************************************** | ||
105 | * void lcd_write_yuv_420_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, "ax", %progbits | ||
123 | .align 2 | ||
124 | .global lcd_write_yuv420_lines | ||
125 | .type lcd_write_yuv420_lines, %function | ||
126 | lcd_write_yuv420_lines: | ||
127 | @ r0 = dst | ||
128 | @ r1 = yuv_src | ||
129 | @ r2 = width | ||
130 | @ r3 = stride | ||
131 | stmfd sp!, { r4-r12 } @ 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 | 10: @ loop line @ | ||
137 | ldrb r7, [r4] @ r7 = *Y'_p; | ||
138 | ldrb r8, [r5], #1 @ r8 = *Cb_p++; | ||
139 | ldrb r9, [r6], #1 @ r9 = *Cr_p++; | ||
140 | @ | ||
141 | sub r7, r7, #16 @ r7 = Y = (Y' - 16)*74 | ||
142 | add r12, r7, r7, asl #2 @ actually (Y' - 16)*37 and shift right | ||
143 | add r7, r12, r7, asl #5 @ by one less when adding - same for all | ||
144 | @ | ||
145 | sub r8, r8, #128 @ Cb -= 128 | ||
146 | sub r9, r9, #128 @ Cr -= 128 | ||
147 | @ | ||
148 | add r10, r9, r9, asl #1 @ r10 = Cr*51 + Cb*24 | ||
149 | add r10, r10, r10, asl #4 @ | ||
150 | add r10, r10, r8, asl #3 @ | ||
151 | add r10, r10, r8, asl #4 @ | ||
152 | @ | ||
153 | add r11, r9, r9, asl #2 @ r9 = Cr*101 | ||
154 | add r11, r11, r9, asl #5 @ | ||
155 | add r9, r11, r9, asl #6 @ | ||
156 | @ | ||
157 | add r8, r8, #2 @ r8 = bu = (Cb*128 + 128) >> 8 | ||
158 | mov r8, r8, asr #2 @ | ||
159 | add r9, r9, #256 @ r9 = rv = (r9 + 256) >> 9 | ||
160 | mov r9, r9, asr #9 @ | ||
161 | rsb r10, r10, #128 @ r10 = guv = (-r10 + 128) >> 8 | ||
162 | mov r10, r10, asr #8 @ | ||
163 | @ compute R, G, and B | ||
164 | add r1, r8, r7, asr #8 @ r1 = b = (Y >> 9) + bu | ||
165 | add r11, r9, r7, asr #8 @ r11 = r = (Y >> 9) + rv | ||
166 | add r7, r10, r7, asr #7 @ r7 = g = (Y >> 8) + guv | ||
167 | @ | ||
168 | orr r12, r1, r11 @ check if clamping is needed... | ||
169 | orr r12, r12, r7, asr #1 @ ...at all | ||
170 | cmp r12, #31 @ | ||
171 | bls 15f @ no clamp @ | ||
172 | cmp r1, #31 @ clamp b | ||
173 | mvnhi r1, r1, asr #31 @ | ||
174 | andhi r1, r1, #31 @ | ||
175 | cmp r11, #31 @ clamp r | ||
176 | mvnhi r11, r11, asr #31 @ | ||
177 | andhi r11, r11, #31 @ | ||
178 | cmp r7, #63 @ clamp g | ||
179 | mvnhi r7, r7, asr #31 @ | ||
180 | andhi r7, r7, #63 @ | ||
181 | 15: @ no clamp @ | ||
182 | @ | ||
183 | orr r12, r1, r7, lsl #5 @ r4 |= (g << 5) | ||
184 | ldrb r7, [r4, r3] @ r7 = Y' = *(Y'_p + stride) | ||
185 | orr r12, r12, r11, lsl #11 @ r4 = b | (r << 11) | ||
186 | strh r12, [r0] @ store pixel | ||
187 | @ | ||
188 | sub r7, r7, #16 @ r7 = Y = (Y' - 16)*74 | ||
189 | add r12, r7, r7, asl #2 @ | ||
190 | add r7, r12, r7, asl #5 @ | ||
191 | @ compute R, G, and B | ||
192 | add r1, r8, r7, asr #8 @ r1 = b = (Y >> 9) + bu | ||
193 | add r11, r9, r7, asr #8 @ r11 = r = (Y >> 9) + rv | ||
194 | add r7, r10, r7, asr #7 @ r7 = g = (Y >> 8) + guv | ||
195 | @ | ||
196 | orr r12, r1, r11 @ check if clamping is needed... | ||
197 | orr r12, r12, r7, asr #1 @ ...at all | ||
198 | cmp r12, #31 @ | ||
199 | bls 15f @ no clamp @ | ||
200 | cmp r1, #31 @ clamp b | ||
201 | mvnhi r1, r1, asr #31 @ | ||
202 | andhi r1, r1, #31 @ | ||
203 | cmp r11, #31 @ clamp r | ||
204 | mvnhi r11, r11, asr #31 @ | ||
205 | andhi r11, r11, #31 @ | ||
206 | cmp r7, #63 @ clamp g | ||
207 | mvnhi r7, r7, asr #31 @ | ||
208 | andhi r7, r7, #63 @ | ||
209 | 15: @ no clamp @ | ||
210 | @ | ||
211 | orr r12, r1, r11, lsl #11 @ r12 = b | (r << 11) | ||
212 | orr r12, r12, r7, lsl #5 @ r12 |= (g << 5) | ||
213 | ldrb r7, [r4, #1]! @ r7 = Y' = *(++Y'_p) | ||
214 | strh r12, [r0, #-2] @ store pixel | ||
215 | add r0, r0, #2*LCD_WIDTH @ | ||
216 | @ | ||
217 | sub r7, r7, #16 @ r7 = Y = (Y' - 16)*74 | ||
218 | add r12, r7, r7, asl #2 @ | ||
219 | add r7, r12, r7, asl #5 @ | ||
220 | @ compute R, G, and B | ||
221 | add r1, r8, r7, asr #8 @ r1 = b = (Y >> 9) + bu | ||
222 | add r11, r9, r7, asr #8 @ r11 = r = (Y >> 9) + rv | ||
223 | add r7, r10, r7, asr #7 @ r7 = g = (Y >> 8) + guv | ||
224 | @ | ||
225 | orr r12, r1, r11 @ check if clamping is needed... | ||
226 | orr r12, r12, r7, asr #1 @ ...at all | ||
227 | cmp r12, #31 @ | ||
228 | bls 15f @ no clamp @ | ||
229 | cmp r1, #31 @ clamp b | ||
230 | mvnhi r1, r1, asr #31 @ | ||
231 | andhi r1, r1, #31 @ | ||
232 | cmp r11, #31 @ clamp r | ||
233 | mvnhi r11, r11, asr #31 @ | ||
234 | andhi r11, r11, #31 @ | ||
235 | cmp r7, #63 @ clamp g | ||
236 | mvnhi r7, r7, asr #31 @ | ||
237 | andhi r7, r7, #63 @ | ||
238 | 15: @ no clamp @ | ||
239 | @ | ||
240 | orr r12, r1, r7, lsl #5 @ r12 = b | (g << 5) | ||
241 | ldrb r7, [r4, r3] @ r7 = Y' = *(Y'_p + stride) | ||
242 | orr r12, r12, r11, lsl #11 @ r12 |= (r << 11) | ||
243 | strh r12, [r0] @ store pixel | ||
244 | @ | ||
245 | sub r7, r7, #16 @ r7 = Y = (Y' - 16)*74 | ||
246 | add r12, r7, r7, asl #2 @ | ||
247 | add r7, r12, r7, asl #5 @ | ||
248 | @ compute R, G, and B | ||
249 | add r1, r8, r7, asr #8 @ r1 = b = (Y >> 9) + bu | ||
250 | add r11, r9, r7, asr #8 @ r11 = r = (Y >> 9) + rv | ||
251 | add r7, r10, r7, asr #7 @ r7 = g = (Y >> 8) + guv | ||
252 | @ | ||
253 | orr r12, r1, r11 @ check if clamping is needed... | ||
254 | orr r12, r12, r7, asr #1 @ ...at all | ||
255 | cmp r12, #31 @ | ||
256 | bls 15f @ no clamp @ | ||
257 | cmp r1, #31 @ clamp b | ||
258 | mvnhi r1, r1, asr #31 @ | ||
259 | andhi r1, r1, #31 @ | ||
260 | cmp r11, #31 @ clamp r | ||
261 | mvnhi r11, r11, asr #31 @ | ||
262 | andhi r11, r11, #31 @ | ||
263 | cmp r7, #63 @ clamp g | ||
264 | mvnhi r7, r7, asr #31 @ | ||
265 | andhi r7, r7, #63 @ | ||
266 | 15: @ no clamp @ | ||
267 | @ | ||
268 | orr r12, r1, r11, lsl #11 @ r12 = b | (r << 11) | ||
269 | orr r12, r12, r7, lsl #5 @ r12 |= (g << 5) | ||
270 | strh r12, [r0, #-2] @ store pixel | ||
271 | add r0, r0, #2*LCD_WIDTH @ | ||
272 | add r4, r4, #1 @ | ||
273 | @ | ||
274 | subs r2, r2, #2 @ subtract block from width | ||
275 | bgt 10b @ loop line @ | ||
276 | @ | ||
277 | ldmfd sp!, { r4-r12 } @ restore registers and return | ||
278 | bx lr @ | ||
279 | .size lcd_write_yuv420_lines, .-lcd_write_yuv420_lines | ||