Bug Summary

File:hw/display/pl110_template.h
Location:line 275, column 9
Description:Value stored to 'data' is never read

Annotated Source Code

1/*
2 * Arm PrimeCell PL110 Color LCD Controller
3 *
4 * Copyright (c) 2005 CodeSourcery, LLC.
5 * Written by Paul Brook
6 *
7 * This code is licensed under the GNU LGPL
8 *
9 * Framebuffer format conversion routines.
10 */
11
12#ifndef ORDER
13
14#if BITS == 8
15#define COPY_PIXEL(to, from) *(to++) = from
16#elif BITS == 15 || BITS == 16
17#define COPY_PIXEL(to, from) *(uint16_t *)to = from; to += 2;
18#elif BITS == 24
19#define COPY_PIXEL(to, from) \
20 *(to++) = from; *(to++) = (from) >> 8; *(to++) = (from) >> 16
21#elif BITS == 32
22#define COPY_PIXEL(to, from) *(uint32_t *)to = from; to += 4;
23#else
24#error unknown bit depth
25#endif
26
27#undef RGB
28#define BORDER bgr
29#define ORDER 0
30#include "pl110_template.h"
31#define ORDER 1
32#include "pl110_template.h"
33#define ORDER 2
34#include "pl110_template.h"
35#undef BORDER
36#define RGB
37#define BORDER rgb
38#define ORDER 0
39#include "pl110_template.h"
40#define ORDER 1
41#include "pl110_template.h"
42#define ORDER 2
43#include "pl110_template.h"
44#undef BORDER
45
46static drawfn glue(pl110_draw_fn_,BITS)pl110_draw_fn_BITS[48] =
47{
48 glue(pl110_draw_line1_lblp_bgr,BITS)pl110_draw_line1_lblp_bgrBITS,
49 glue(pl110_draw_line2_lblp_bgr,BITS)pl110_draw_line2_lblp_bgrBITS,
50 glue(pl110_draw_line4_lblp_bgr,BITS)pl110_draw_line4_lblp_bgrBITS,
51 glue(pl110_draw_line8_lblp_bgr,BITS)pl110_draw_line8_lblp_bgrBITS,
52 glue(pl110_draw_line16_555_lblp_bgr,BITS)pl110_draw_line16_555_lblp_bgrBITS,
53 glue(pl110_draw_line32_lblp_bgr,BITS)pl110_draw_line32_lblp_bgrBITS,
54 glue(pl110_draw_line16_lblp_bgr,BITS)pl110_draw_line16_lblp_bgrBITS,
55 glue(pl110_draw_line12_lblp_bgr,BITS)pl110_draw_line12_lblp_bgrBITS,
56
57 glue(pl110_draw_line1_bbbp_bgr,BITS)pl110_draw_line1_bbbp_bgrBITS,
58 glue(pl110_draw_line2_bbbp_bgr,BITS)pl110_draw_line2_bbbp_bgrBITS,
59 glue(pl110_draw_line4_bbbp_bgr,BITS)pl110_draw_line4_bbbp_bgrBITS,
60 glue(pl110_draw_line8_bbbp_bgr,BITS)pl110_draw_line8_bbbp_bgrBITS,
61 glue(pl110_draw_line16_555_bbbp_bgr,BITS)pl110_draw_line16_555_bbbp_bgrBITS,
62 glue(pl110_draw_line32_bbbp_bgr,BITS)pl110_draw_line32_bbbp_bgrBITS,
63 glue(pl110_draw_line16_bbbp_bgr,BITS)pl110_draw_line16_bbbp_bgrBITS,
64 glue(pl110_draw_line12_bbbp_bgr,BITS)pl110_draw_line12_bbbp_bgrBITS,
65
66 glue(pl110_draw_line1_lbbp_bgr,BITS)pl110_draw_line1_lbbp_bgrBITS,
67 glue(pl110_draw_line2_lbbp_bgr,BITS)pl110_draw_line2_lbbp_bgrBITS,
68 glue(pl110_draw_line4_lbbp_bgr,BITS)pl110_draw_line4_lbbp_bgrBITS,
69 glue(pl110_draw_line8_lbbp_bgr,BITS)pl110_draw_line8_lbbp_bgrBITS,
70 glue(pl110_draw_line16_555_lbbp_bgr,BITS)pl110_draw_line16_555_lbbp_bgrBITS,
71 glue(pl110_draw_line32_lbbp_bgr,BITS)pl110_draw_line32_lbbp_bgrBITS,
72 glue(pl110_draw_line16_lbbp_bgr,BITS)pl110_draw_line16_lbbp_bgrBITS,
73 glue(pl110_draw_line12_lbbp_bgr,BITS)pl110_draw_line12_lbbp_bgrBITS,
74
75 glue(pl110_draw_line1_lblp_rgb,BITS)pl110_draw_line1_lblp_rgbBITS,
76 glue(pl110_draw_line2_lblp_rgb,BITS)pl110_draw_line2_lblp_rgbBITS,
77 glue(pl110_draw_line4_lblp_rgb,BITS)pl110_draw_line4_lblp_rgbBITS,
78 glue(pl110_draw_line8_lblp_rgb,BITS)pl110_draw_line8_lblp_rgbBITS,
79 glue(pl110_draw_line16_555_lblp_rgb,BITS)pl110_draw_line16_555_lblp_rgbBITS,
80 glue(pl110_draw_line32_lblp_rgb,BITS)pl110_draw_line32_lblp_rgbBITS,
81 glue(pl110_draw_line16_lblp_rgb,BITS)pl110_draw_line16_lblp_rgbBITS,
82 glue(pl110_draw_line12_lblp_rgb,BITS)pl110_draw_line12_lblp_rgbBITS,
83
84 glue(pl110_draw_line1_bbbp_rgb,BITS)pl110_draw_line1_bbbp_rgbBITS,
85 glue(pl110_draw_line2_bbbp_rgb,BITS)pl110_draw_line2_bbbp_rgbBITS,
86 glue(pl110_draw_line4_bbbp_rgb,BITS)pl110_draw_line4_bbbp_rgbBITS,
87 glue(pl110_draw_line8_bbbp_rgb,BITS)pl110_draw_line8_bbbp_rgbBITS,
88 glue(pl110_draw_line16_555_bbbp_rgb,BITS)pl110_draw_line16_555_bbbp_rgbBITS,
89 glue(pl110_draw_line32_bbbp_rgb,BITS)pl110_draw_line32_bbbp_rgbBITS,
90 glue(pl110_draw_line16_bbbp_rgb,BITS)pl110_draw_line16_bbbp_rgbBITS,
91 glue(pl110_draw_line12_bbbp_rgb,BITS)pl110_draw_line12_bbbp_rgbBITS,
92
93 glue(pl110_draw_line1_lbbp_rgb,BITS)pl110_draw_line1_lbbp_rgbBITS,
94 glue(pl110_draw_line2_lbbp_rgb,BITS)pl110_draw_line2_lbbp_rgbBITS,
95 glue(pl110_draw_line4_lbbp_rgb,BITS)pl110_draw_line4_lbbp_rgbBITS,
96 glue(pl110_draw_line8_lbbp_rgb,BITS)pl110_draw_line8_lbbp_rgbBITS,
97 glue(pl110_draw_line16_555_lbbp_rgb,BITS)pl110_draw_line16_555_lbbp_rgbBITS,
98 glue(pl110_draw_line32_lbbp_rgb,BITS)pl110_draw_line32_lbbp_rgbBITS,
99 glue(pl110_draw_line16_lbbp_rgb,BITS)pl110_draw_line16_lbbp_rgbBITS,
100 glue(pl110_draw_line12_lbbp_rgb,BITS)pl110_draw_line12_lbbp_rgbBITS,
101};
102
103#undef BITS
104#undef COPY_PIXEL
105
106#else
107
108#if ORDER == 0
109#define NAME glue(glue(lblp_, BORDER), BITS)lblp_BORDERBITS
110#ifdef HOST_WORDS_BIGENDIAN
111#define SWAP_WORDS 1
112#endif
113#elif ORDER == 1
114#define NAME glue(glue(bbbp_, BORDER), BITS)bbbp_BORDERBITS
115#ifndef HOST_WORDS_BIGENDIAN
116#define SWAP_WORDS 1
117#endif
118#else
119#define SWAP_PIXELS 1
120#define NAME glue(glue(lbbp_, BORDER), BITS)lbbp_BORDERBITS
121#ifdef HOST_WORDS_BIGENDIAN
122#define SWAP_WORDS 1
123#endif
124#endif
125
126#define FN_2(x, y)FN(x, y) FN(x+1, y) FN(x, y) FN(x+1, y)
127#define FN_4(x, y)FN(x, y) FN(x+1, y) FN(x+2, y) FN(x+2 +1, y) FN_2(x, y)FN(x, y) FN(x+1, y) FN_2(x+2, y)FN(x+2, y) FN(x+2 +1, y)
128#define FN_8(y)FN(0, y) FN(0 +1, y) FN(0 +2, y) FN(0 +2 +1, y) FN(4, y) FN(4
+1, y) FN(4 +2, y) FN(4 +2 +1, y) FN_4(0, y)FN(0, y) FN(0 +1, y) FN(0 +2, y) FN(0 +2 +1, y) FN_4(4, y)FN(4, y) FN(4 +1, y) FN(4 +2, y) FN(4 +2 +1, y)
129
130static void glue(pl110_draw_line1_,NAME)pl110_draw_line1_NAME(void *opaque, uint8_t *d, const uint8_t *src, int width, int deststep)
131{
132 uint32_t *palette = opaque;
133 uint32_t data;
134 while (width > 0) {
135 data = *(uint32_t *)src;
136#ifdef SWAP_PIXELS
137#define FN(x, y) COPY_PIXEL(d, palette[(data >> (y + 7 - (x))) & 1]);
138#else
139#define FN(x, y) COPY_PIXEL(d, palette[(data >> ((x) + y)) & 1]);
140#endif
141#ifdef SWAP_WORDS
142 FN_8(24)FN(0, 24) FN(0 +1, 24) FN(0 +2, 24) FN(0 +2 +1, 24) FN(4, 24)
FN(4 +1, 24) FN(4 +2, 24) FN(4 +2 +1, 24)
143 FN_8(16)FN(0, 16) FN(0 +1, 16) FN(0 +2, 16) FN(0 +2 +1, 16) FN(4, 16)
FN(4 +1, 16) FN(4 +2, 16) FN(4 +2 +1, 16)
144 FN_8(8)FN(0, 8) FN(0 +1, 8) FN(0 +2, 8) FN(0 +2 +1, 8) FN(4, 8) FN(4
+1, 8) FN(4 +2, 8) FN(4 +2 +1, 8)
145 FN_8(0)FN(0, 0) FN(0 +1, 0) FN(0 +2, 0) FN(0 +2 +1, 0) FN(4, 0) FN(4
+1, 0) FN(4 +2, 0) FN(4 +2 +1, 0)
146#else
147 FN_8(0)FN(0, 0) FN(0 +1, 0) FN(0 +2, 0) FN(0 +2 +1, 0) FN(4, 0) FN(4
+1, 0) FN(4 +2, 0) FN(4 +2 +1, 0)
148 FN_8(8)FN(0, 8) FN(0 +1, 8) FN(0 +2, 8) FN(0 +2 +1, 8) FN(4, 8) FN(4
+1, 8) FN(4 +2, 8) FN(4 +2 +1, 8)
149 FN_8(16)FN(0, 16) FN(0 +1, 16) FN(0 +2, 16) FN(0 +2 +1, 16) FN(4, 16)
FN(4 +1, 16) FN(4 +2, 16) FN(4 +2 +1, 16)
150 FN_8(24)FN(0, 24) FN(0 +1, 24) FN(0 +2, 24) FN(0 +2 +1, 24) FN(4, 24)
FN(4 +1, 24) FN(4 +2, 24) FN(4 +2 +1, 24)
151#endif
152#undef FN
153 width -= 32;
154 src += 4;
155 }
156}
157
158static void glue(pl110_draw_line2_,NAME)pl110_draw_line2_NAME(void *opaque, uint8_t *d, const uint8_t *src, int width, int deststep)
159{
160 uint32_t *palette = opaque;
161 uint32_t data;
162 while (width > 0) {
163 data = *(uint32_t *)src;
164#ifdef SWAP_PIXELS
165#define FN(x, y) COPY_PIXEL(d, palette[(data >> (y + 6 - (x)*2)) & 3]);
166#else
167#define FN(x, y) COPY_PIXEL(d, palette[(data >> ((x)*2 + y)) & 3]);
168#endif
169#ifdef SWAP_WORDS
170 FN_4(0, 24)FN(0, 24) FN(0 +1, 24) FN(0 +2, 24) FN(0 +2 +1, 24)
171 FN_4(0, 16)FN(0, 16) FN(0 +1, 16) FN(0 +2, 16) FN(0 +2 +1, 16)
172 FN_4(0, 8)FN(0, 8) FN(0 +1, 8) FN(0 +2, 8) FN(0 +2 +1, 8)
173 FN_4(0, 0)FN(0, 0) FN(0 +1, 0) FN(0 +2, 0) FN(0 +2 +1, 0)
174#else
175 FN_4(0, 0)FN(0, 0) FN(0 +1, 0) FN(0 +2, 0) FN(0 +2 +1, 0)
176 FN_4(0, 8)FN(0, 8) FN(0 +1, 8) FN(0 +2, 8) FN(0 +2 +1, 8)
177 FN_4(0, 16)FN(0, 16) FN(0 +1, 16) FN(0 +2, 16) FN(0 +2 +1, 16)
178 FN_4(0, 24)FN(0, 24) FN(0 +1, 24) FN(0 +2, 24) FN(0 +2 +1, 24)
179#endif
180#undef FN
181 width -= 16;
182 src += 4;
183 }
184}
185
186static void glue(pl110_draw_line4_,NAME)pl110_draw_line4_NAME(void *opaque, uint8_t *d, const uint8_t *src, int width, int deststep)
187{
188 uint32_t *palette = opaque;
189 uint32_t data;
190 while (width > 0) {
191 data = *(uint32_t *)src;
192#ifdef SWAP_PIXELS
193#define FN(x, y) COPY_PIXEL(d, palette[(data >> (y + 4 - (x)*4)) & 0xf]);
194#else
195#define FN(x, y) COPY_PIXEL(d, palette[(data >> ((x)*4 + y)) & 0xf]);
196#endif
197#ifdef SWAP_WORDS
198 FN_2(0, 24)FN(0, 24) FN(0 +1, 24)
199 FN_2(0, 16)FN(0, 16) FN(0 +1, 16)
200 FN_2(0, 8)FN(0, 8) FN(0 +1, 8)
201 FN_2(0, 0)FN(0, 0) FN(0 +1, 0)
202#else
203 FN_2(0, 0)FN(0, 0) FN(0 +1, 0)
204 FN_2(0, 8)FN(0, 8) FN(0 +1, 8)
205 FN_2(0, 16)FN(0, 16) FN(0 +1, 16)
206 FN_2(0, 24)FN(0, 24) FN(0 +1, 24)
207#endif
208#undef FN
209 width -= 8;
210 src += 4;
211 }
212}
213
214static void glue(pl110_draw_line8_,NAME)pl110_draw_line8_NAME(void *opaque, uint8_t *d, const uint8_t *src, int width, int deststep)
215{
216 uint32_t *palette = opaque;
217 uint32_t data;
218 while (width > 0) {
219 data = *(uint32_t *)src;
220#define FN(x) COPY_PIXEL(d, palette[(data >> (x)) & 0xff]);
221#ifdef SWAP_WORDS
222 FN(24)
223 FN(16)
224 FN(8)
225 FN(0)
226#else
227 FN(0)
228 FN(8)
229 FN(16)
230 FN(24)
231#endif
232#undef FN
233 width -= 4;
234 src += 4;
235 }
236}
237
238static void glue(pl110_draw_line16_,NAME)pl110_draw_line16_NAME(void *opaque, uint8_t *d, const uint8_t *src, int width, int deststep)
239{
240 uint32_t data;
241 unsigned int r, g, b;
242 while (width > 0) {
243 data = *(uint32_t *)src;
244#ifdef SWAP_WORDS
245 data = bswap32(data);
246#endif
247#ifdef RGB
248#define LSB r
249#define MSB b
250#else
251#define LSB b
252#define MSB r
253#endif
254#if 0
255 LSB = data & 0x1f;
256 data >>= 5;
257 g = data & 0x3f;
258 data >>= 6;
259 MSB = data & 0x1f;
260 data >>= 5;
261#else
262 LSB = (data & 0x1f) << 3;
263 data >>= 5;
264 g = (data & 0x3f) << 2;
265 data >>= 6;
266 MSB = (data & 0x1f) << 3;
267 data >>= 5;
268#endif
269 COPY_PIXEL(d, glue(rgb_to_pixel,BITS)rgb_to_pixelBITS(r, g, b));
270 LSB = (data & 0x1f) << 3;
271 data >>= 5;
272 g = (data & 0x3f) << 2;
273 data >>= 6;
274 MSB = (data & 0x1f) << 3;
275 data >>= 5;
Value stored to 'data' is never read
276 COPY_PIXEL(d, glue(rgb_to_pixel,BITS)rgb_to_pixelBITS(r, g, b));
277#undef MSB
278#undef LSB
279 width -= 2;
280 src += 4;
281 }
282}
283
284static void glue(pl110_draw_line32_,NAME)pl110_draw_line32_NAME(void *opaque, uint8_t *d, const uint8_t *src, int width, int deststep)
285{
286 uint32_t data;
287 unsigned int r, g, b;
288 while (width > 0) {
289 data = *(uint32_t *)src;
290#ifdef RGB
291#define LSB r
292#define MSB b
293#else
294#define LSB b
295#define MSB r
296#endif
297#ifndef SWAP_WORDS
298 LSB = data & 0xff;
299 g = (data >> 8) & 0xff;
300 MSB = (data >> 16) & 0xff;
301#else
302 LSB = (data >> 24) & 0xff;
303 g = (data >> 16) & 0xff;
304 MSB = (data >> 8) & 0xff;
305#endif
306 COPY_PIXEL(d, glue(rgb_to_pixel,BITS)rgb_to_pixelBITS(r, g, b));
307#undef MSB
308#undef LSB
309 width--;
310 src += 4;
311 }
312}
313
314static void glue(pl110_draw_line16_555_,NAME)pl110_draw_line16_555_NAME(void *opaque, uint8_t *d, const uint8_t *src, int width, int deststep)
315{
316 /* RGB 555 plus an intensity bit (which we ignore) */
317 uint32_t data;
318 unsigned int r, g, b;
319 while (width > 0) {
320 data = *(uint32_t *)src;
321#ifdef SWAP_WORDS
322 data = bswap32(data);
323#endif
324#ifdef RGB
325#define LSB r
326#define MSB b
327#else
328#define LSB b
329#define MSB r
330#endif
331 LSB = (data & 0x1f) << 3;
332 data >>= 5;
333 g = (data & 0x1f) << 3;
334 data >>= 5;
335 MSB = (data & 0x1f) << 3;
336 data >>= 5;
337 COPY_PIXEL(d, glue(rgb_to_pixel,BITS)rgb_to_pixelBITS(r, g, b));
338 LSB = (data & 0x1f) << 3;
339 data >>= 5;
340 g = (data & 0x1f) << 3;
341 data >>= 5;
342 MSB = (data & 0x1f) << 3;
343 data >>= 6;
344 COPY_PIXEL(d, glue(rgb_to_pixel,BITS)rgb_to_pixelBITS(r, g, b));
345#undef MSB
346#undef LSB
347 width -= 2;
348 src += 4;
349 }
350}
351
352static void glue(pl110_draw_line12_,NAME)pl110_draw_line12_NAME(void *opaque, uint8_t *d, const uint8_t *src, int width, int deststep)
353{
354 /* RGB 444 with 4 bits of zeroes at the top of each halfword */
355 uint32_t data;
356 unsigned int r, g, b;
357 while (width > 0) {
358 data = *(uint32_t *)src;
359#ifdef SWAP_WORDS
360 data = bswap32(data);
361#endif
362#ifdef RGB
363#define LSB r
364#define MSB b
365#else
366#define LSB b
367#define MSB r
368#endif
369 LSB = (data & 0xf) << 4;
370 data >>= 4;
371 g = (data & 0xf) << 4;
372 data >>= 4;
373 MSB = (data & 0xf) << 4;
374 data >>= 8;
375 COPY_PIXEL(d, glue(rgb_to_pixel,BITS)rgb_to_pixelBITS(r, g, b));
376 LSB = (data & 0xf) << 4;
377 data >>= 4;
378 g = (data & 0xf) << 4;
379 data >>= 4;
380 MSB = (data & 0xf) << 4;
381 data >>= 8;
382 COPY_PIXEL(d, glue(rgb_to_pixel,BITS)rgb_to_pixelBITS(r, g, b));
383#undef MSB
384#undef LSB
385 width -= 2;
386 src += 4;
387 }
388}
389
390#undef SWAP_PIXELS
391#undef NAME
392#undef SWAP_WORDS
393#undef ORDER
394
395#endif