Commit | Line | Data |
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1ab64c54 GI |
1 | /* |
2 | * (C) GraÅžvydas "notaz" Ignotas, 2011 | |
3 | * | |
4 | * This work is licensed under the terms of any of these licenses | |
5 | * (at your option): | |
6 | * - GNU GPL, version 2 or later. | |
7 | * - GNU LGPL, version 2.1 or later. | |
8 | * See the COPYING file in the top-level directory. | |
9 | */ | |
10 | ||
d30279e2 | 11 | #include <stdio.h> |
1ab64c54 | 12 | #include <string.h> |
56f08d83 | 13 | #include "gpu.h" |
1ab64c54 GI |
14 | |
15 | #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) | |
d30279e2 | 16 | #define unlikely(x) __builtin_expect((x), 0) |
8dd855cd | 17 | #define noinline __attribute__((noinline)) |
1ab64c54 | 18 | |
deb18d24 | 19 | #define gpu_log(fmt, ...) \ |
20 | printf("%d:%03d: " fmt, gpu.state.frame_count, *gpu.state.hcnt, ##__VA_ARGS__) | |
21 | ||
22 | //#define log_io gpu_log | |
56f08d83 | 23 | #define log_io(...) |
deb18d24 | 24 | #define log_anomaly gpu_log |
25 | //#define log_anomaly(...) | |
56f08d83 | 26 | |
27 | struct psx_gpu gpu __attribute__((aligned(64))); | |
1ab64c54 | 28 | |
6e9bdaef | 29 | static noinline void do_reset(void) |
1ab64c54 | 30 | { |
6e9bdaef | 31 | memset(gpu.regs, 0, sizeof(gpu.regs)); |
d30279e2 | 32 | gpu.status.reg = 0x14802000; |
6e9bdaef | 33 | gpu.gp0 = 0; |
fc84f618 | 34 | gpu.regs[3] = 1; |
6e9bdaef | 35 | gpu.screen.hres = gpu.screen.w = 256; |
fc84f618 | 36 | gpu.screen.vres = gpu.screen.h = 240; |
1ab64c54 GI |
37 | } |
38 | ||
8dd855cd | 39 | static noinline void update_width(void) |
40 | { | |
41 | int sw = gpu.screen.x2 - gpu.screen.x1; | |
42 | if (sw <= 0 || sw >= 2560) | |
43 | // full width | |
44 | gpu.screen.w = gpu.screen.hres; | |
45 | else | |
46 | gpu.screen.w = sw * gpu.screen.hres / 2560; | |
47 | } | |
48 | ||
49 | static noinline void update_height(void) | |
50 | { | |
51 | int sh = gpu.screen.y2 - gpu.screen.y1; | |
52 | if (gpu.status.dheight) | |
53 | sh *= 2; | |
54 | if (sh <= 0) | |
55 | sh = gpu.screen.vres; | |
56 | ||
57 | gpu.screen.h = sh; | |
58 | } | |
59 | ||
fc84f618 | 60 | static noinline void decide_frameskip(void) |
61 | { | |
62 | gpu.frameskip.frame_ready = !gpu.frameskip.active; | |
63 | ||
64 | if (!gpu.frameskip.active && *gpu.frameskip.advice) | |
65 | gpu.frameskip.active = 1; | |
66 | else | |
67 | gpu.frameskip.active = 0; | |
68 | } | |
69 | ||
6e9bdaef | 70 | static noinline void get_gpu_info(uint32_t data) |
71 | { | |
72 | switch (data & 0x0f) { | |
73 | case 0x02: | |
74 | case 0x03: | |
75 | case 0x04: | |
76 | case 0x05: | |
77 | gpu.gp0 = gpu.ex_regs[data & 7] & 0xfffff; | |
78 | break; | |
79 | case 0x06: | |
80 | gpu.gp0 = gpu.ex_regs[5] & 0xfffff; | |
81 | break; | |
82 | case 0x07: | |
83 | gpu.gp0 = 2; | |
84 | break; | |
85 | default: | |
86 | gpu.gp0 = 0; | |
87 | break; | |
88 | } | |
89 | } | |
90 | ||
91 | long GPUinit(void) | |
92 | { | |
93 | int ret = vout_init(); | |
94 | do_reset(); | |
95 | gpu.lcf_hc = &gpu.zero; | |
deb18d24 | 96 | gpu.state.frame_count = 0; |
97 | gpu.state.hcnt = &gpu.zero; | |
6e9bdaef | 98 | return ret; |
99 | } | |
100 | ||
101 | long GPUshutdown(void) | |
102 | { | |
103 | return vout_finish(); | |
104 | } | |
105 | ||
1ab64c54 GI |
106 | void GPUwriteStatus(uint32_t data) |
107 | { | |
108 | static const short hres[8] = { 256, 368, 320, 384, 512, 512, 640, 640 }; | |
109 | static const short vres[4] = { 240, 480, 256, 480 }; | |
110 | uint32_t cmd = data >> 24; | |
111 | ||
fc84f618 | 112 | if (cmd < ARRAY_SIZE(gpu.regs)) { |
113 | if (cmd != 0 && gpu.regs[cmd] == data) | |
114 | return; | |
8dd855cd | 115 | gpu.regs[cmd] = data; |
fc84f618 | 116 | } |
117 | ||
118 | gpu.state.fb_dirty = 1; | |
8dd855cd | 119 | |
120 | switch (cmd) { | |
1ab64c54 | 121 | case 0x00: |
6e9bdaef | 122 | do_reset(); |
1ab64c54 GI |
123 | break; |
124 | case 0x03: | |
d30279e2 | 125 | gpu.status.blanking = data & 1; |
1ab64c54 GI |
126 | break; |
127 | case 0x04: | |
128 | gpu.status.dma = data & 3; | |
129 | break; | |
130 | case 0x05: | |
131 | gpu.screen.x = data & 0x3ff; | |
132 | gpu.screen.y = (data >> 10) & 0x3ff; | |
fc84f618 | 133 | if (gpu.frameskip.enabled) |
134 | decide_frameskip(); | |
1ab64c54 | 135 | break; |
8dd855cd | 136 | case 0x06: |
137 | gpu.screen.x1 = data & 0xfff; | |
138 | gpu.screen.x2 = (data >> 12) & 0xfff; | |
139 | update_width(); | |
140 | break; | |
1ab64c54 GI |
141 | case 0x07: |
142 | gpu.screen.y1 = data & 0x3ff; | |
143 | gpu.screen.y2 = (data >> 10) & 0x3ff; | |
8dd855cd | 144 | update_height(); |
1ab64c54 GI |
145 | break; |
146 | case 0x08: | |
147 | gpu.status.reg = (gpu.status.reg & ~0x7f0000) | ((data & 0x3F) << 17) | ((data & 0x40) << 10); | |
8dd855cd | 148 | gpu.screen.hres = hres[(gpu.status.reg >> 16) & 7]; |
149 | gpu.screen.vres = vres[(gpu.status.reg >> 19) & 3]; | |
150 | update_width(); | |
151 | update_height(); | |
1ab64c54 | 152 | break; |
deb18d24 | 153 | default: |
154 | if ((cmd & 0xf0) == 0x10) | |
155 | get_gpu_info(data); | |
6e9bdaef | 156 | break; |
1ab64c54 | 157 | } |
1ab64c54 GI |
158 | } |
159 | ||
56f08d83 | 160 | const unsigned char cmd_lengths[256] = |
1ab64c54 | 161 | { |
d30279e2 GI |
162 | 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
163 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
164 | 3, 3, 3, 3, 6, 6, 6, 6, 4, 4, 4, 4, 8, 8, 8, 8, // 20 | |
165 | 5, 5, 5, 5, 8, 8, 8, 8, 7, 7, 7, 7, 11, 11, 11, 11, | |
166 | 2, 2, 2, 2, 0, 0, 0, 0, 3, 3, 3, 3, 3, 3, 3, 3, // 40 | |
167 | 3, 3, 3, 3, 0, 0, 0, 0, 4, 4, 4, 4, 4, 4, 4, 4, | |
168 | 2, 2, 2, 2, 3, 3, 3, 3, 1, 1, 1, 1, 2, 2, 2, 2, // 60 | |
169 | 1, 1, 1, 1, 2, 2, 2, 2, 1, 1, 1, 1, 2, 2, 2, 2, | |
170 | 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 80 | |
171 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
172 | 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // a0 | |
173 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
174 | 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // c0 | |
175 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
176 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // e0 | |
177 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
178 | }; | |
179 | ||
d30279e2 GI |
180 | #define VRAM_MEM_XY(x, y) &gpu.vram[(y) * 1024 + (x)] |
181 | ||
182 | static inline void do_vram_line(int x, int y, uint16_t *mem, int l, int is_read) | |
1ab64c54 | 183 | { |
d30279e2 GI |
184 | uint16_t *vram = VRAM_MEM_XY(x, y); |
185 | if (is_read) | |
186 | memcpy(mem, vram, l * 2); | |
187 | else | |
188 | memcpy(vram, mem, l * 2); | |
189 | } | |
190 | ||
191 | static int do_vram_io(uint32_t *data, int count, int is_read) | |
192 | { | |
193 | int count_initial = count; | |
194 | uint16_t *sdata = (uint16_t *)data; | |
195 | int x = gpu.dma.x, y = gpu.dma.y; | |
196 | int w = gpu.dma.w, h = gpu.dma.h; | |
ddd56f6e | 197 | int o = gpu.dma.offset; |
d30279e2 GI |
198 | int l; |
199 | count *= 2; // operate in 16bpp pixels | |
200 | ||
201 | if (gpu.dma.offset) { | |
202 | l = w - gpu.dma.offset; | |
ddd56f6e | 203 | if (count < l) |
d30279e2 | 204 | l = count; |
ddd56f6e | 205 | |
206 | do_vram_line(x + o, y, sdata, l, is_read); | |
207 | ||
208 | if (o + l < w) | |
209 | o += l; | |
210 | else { | |
211 | o = 0; | |
212 | y++; | |
213 | h--; | |
214 | } | |
d30279e2 GI |
215 | sdata += l; |
216 | count -= l; | |
d30279e2 GI |
217 | } |
218 | ||
219 | for (; h > 0 && count >= w; sdata += w, count -= w, y++, h--) { | |
220 | y &= 511; | |
221 | do_vram_line(x, y, sdata, w, is_read); | |
222 | } | |
223 | ||
224 | if (h > 0 && count > 0) { | |
225 | y &= 511; | |
226 | do_vram_line(x, y, sdata, count, is_read); | |
ddd56f6e | 227 | o = count; |
d30279e2 GI |
228 | count = 0; |
229 | } | |
d30279e2 GI |
230 | gpu.dma.y = y; |
231 | gpu.dma.h = h; | |
ddd56f6e | 232 | gpu.dma.offset = o; |
d30279e2 | 233 | |
6e9bdaef | 234 | return count_initial - count / 2; |
d30279e2 GI |
235 | } |
236 | ||
237 | static void start_vram_transfer(uint32_t pos_word, uint32_t size_word, int is_read) | |
238 | { | |
ddd56f6e | 239 | if (gpu.dma.h) |
240 | log_anomaly("start_vram_transfer while old unfinished\n"); | |
241 | ||
d30279e2 GI |
242 | gpu.dma.x = pos_word & 1023; |
243 | gpu.dma.y = (pos_word >> 16) & 511; | |
244 | gpu.dma.w = size_word & 0xffff; // ? | |
245 | gpu.dma.h = size_word >> 16; | |
246 | gpu.dma.offset = 0; | |
247 | ||
248 | if (is_read) | |
249 | gpu.status.img = 1; | |
250 | ||
6e9bdaef | 251 | log_io("start_vram_transfer %c (%d, %d) %dx%d\n", is_read ? 'r' : 'w', |
252 | gpu.dma.x, gpu.dma.y, gpu.dma.w, gpu.dma.h); | |
d30279e2 GI |
253 | } |
254 | ||
255 | static int check_cmd(uint32_t *data, int count) | |
256 | { | |
257 | int len, cmd, start, pos; | |
fc84f618 | 258 | int vram_dirty = 0; |
d30279e2 | 259 | |
d30279e2 | 260 | // process buffer |
ddd56f6e | 261 | for (start = pos = 0; pos < count; ) |
d30279e2 GI |
262 | { |
263 | cmd = -1; | |
264 | len = 0; | |
265 | ||
266 | if (gpu.dma.h) { | |
267 | pos += do_vram_io(data + pos, count - pos, 0); | |
ddd56f6e | 268 | if (pos == count) |
269 | break; | |
d30279e2 GI |
270 | start = pos; |
271 | } | |
272 | ||
ddd56f6e | 273 | // do look-ahead pass to detect SR changes and VRAM i/o |
d30279e2 | 274 | while (pos < count) { |
56f08d83 | 275 | uint32_t *list = data + pos; |
276 | cmd = list[0] >> 24; | |
d30279e2 | 277 | len = 1 + cmd_lengths[cmd]; |
56f08d83 | 278 | |
d30279e2 | 279 | //printf(" %3d: %02x %d\n", pos, cmd, len); |
56f08d83 | 280 | if ((cmd & 0xf4) == 0x24) { |
281 | // flat textured prim | |
282 | gpu.status.reg &= ~0x1ff; | |
283 | gpu.status.reg |= list[4] & 0x1ff; | |
284 | } | |
285 | else if ((cmd & 0xf4) == 0x34) { | |
286 | // shaded textured prim | |
287 | gpu.status.reg &= ~0x1ff; | |
288 | gpu.status.reg |= list[5] & 0x1ff; | |
289 | } | |
290 | else switch (cmd) | |
291 | { | |
292 | case 0xe1: | |
293 | gpu.status.reg &= ~0x7ff; | |
294 | gpu.status.reg |= list[0] & 0x7ff; | |
295 | break; | |
296 | case 0xe6: | |
297 | gpu.status.reg &= ~0x1800; | |
298 | gpu.status.reg |= (list[0] & 3) << 11; | |
299 | break; | |
300 | } | |
fc84f618 | 301 | if (2 <= cmd && cmd < 0xc0) |
302 | vram_dirty = 1; | |
6e9bdaef | 303 | else if ((cmd & 0xf8) == 0xe0) |
304 | gpu.ex_regs[cmd & 7] = list[0]; | |
56f08d83 | 305 | |
d30279e2 GI |
306 | if (pos + len > count) { |
307 | cmd = -1; | |
308 | break; // incomplete cmd | |
309 | } | |
310 | if (cmd == 0xa0 || cmd == 0xc0) | |
311 | break; // image i/o | |
312 | pos += len; | |
313 | } | |
314 | ||
315 | if (pos - start > 0) { | |
fc84f618 | 316 | if (!gpu.frameskip.active) |
317 | do_cmd_list(data + start, pos - start); | |
d30279e2 GI |
318 | start = pos; |
319 | } | |
320 | ||
321 | if (cmd == 0xa0 || cmd == 0xc0) { | |
322 | // consume vram write/read cmd | |
323 | start_vram_transfer(data[pos + 1], data[pos + 2], cmd == 0xc0); | |
324 | pos += len; | |
325 | } | |
326 | ||
ddd56f6e | 327 | if (cmd == -1) |
328 | break; | |
d30279e2 | 329 | } |
ddd56f6e | 330 | |
fc84f618 | 331 | gpu.state.fb_dirty |= vram_dirty; |
332 | ||
ddd56f6e | 333 | return count - pos; |
d30279e2 GI |
334 | } |
335 | ||
336 | static void flush_cmd_buffer(void) | |
337 | { | |
338 | int left = check_cmd(gpu.cmd_buffer, gpu.cmd_len); | |
339 | if (left > 0) | |
340 | memmove(gpu.cmd_buffer, gpu.cmd_buffer + gpu.cmd_len - left, left * 4); | |
341 | gpu.cmd_len = left; | |
1ab64c54 GI |
342 | } |
343 | ||
344 | void GPUwriteDataMem(uint32_t *mem, int count) | |
345 | { | |
d30279e2 GI |
346 | int left; |
347 | ||
56f08d83 | 348 | log_io("gpu_dma_write %p %d\n", mem, count); |
349 | ||
d30279e2 GI |
350 | if (unlikely(gpu.cmd_len > 0)) |
351 | flush_cmd_buffer(); | |
56f08d83 | 352 | |
d30279e2 GI |
353 | left = check_cmd(mem, count); |
354 | if (left) | |
56f08d83 | 355 | log_anomaly("GPUwriteDataMem: discarded %d/%d words\n", left, count); |
1ab64c54 GI |
356 | } |
357 | ||
d30279e2 | 358 | void GPUwriteData(uint32_t data) |
1ab64c54 | 359 | { |
56f08d83 | 360 | log_io("gpu_write %08x\n", data); |
d30279e2 GI |
361 | gpu.cmd_buffer[gpu.cmd_len++] = data; |
362 | if (gpu.cmd_len >= CMD_BUFFER_LEN) | |
363 | flush_cmd_buffer(); | |
1ab64c54 GI |
364 | } |
365 | ||
ddd56f6e | 366 | long GPUdmaChain(uint32_t *rambase, uint32_t start_addr) |
1ab64c54 | 367 | { |
ddd56f6e | 368 | uint32_t addr, *list; |
deb18d24 | 369 | uint32_t *llist_entry = NULL; |
ddd56f6e | 370 | int len, left, count; |
deb18d24 | 371 | long dma_words = 0; |
d30279e2 GI |
372 | |
373 | if (unlikely(gpu.cmd_len > 0)) | |
374 | flush_cmd_buffer(); | |
375 | ||
deb18d24 | 376 | // ff7 sends it's main list twice, detect this |
377 | if (gpu.state.frame_count == gpu.state.last_list.frame && | |
378 | *gpu.state.hcnt - gpu.state.last_list.hcnt <= 1 && | |
379 | gpu.state.last_list.words > 1024) | |
380 | { | |
381 | llist_entry = rambase + (gpu.state.last_list.addr & 0x1fffff) / 4; | |
382 | *llist_entry |= 0x800000; | |
383 | } | |
384 | ||
56f08d83 | 385 | log_io("gpu_dma_chain\n"); |
ddd56f6e | 386 | addr = start_addr & 0xffffff; |
387 | for (count = 0; addr != 0xffffff; count++) | |
388 | { | |
ddd56f6e | 389 | list = rambase + (addr & 0x1fffff) / 4; |
d30279e2 GI |
390 | len = list[0] >> 24; |
391 | addr = list[0] & 0xffffff; | |
deb18d24 | 392 | dma_words += 1 + len; |
393 | ||
394 | log_io(".chain %08x #%d\n", (list - rambase) * 4, len); | |
ddd56f6e | 395 | |
396 | // loop detection marker | |
397 | // (bit23 set causes DMA error on real machine, so | |
398 | // unlikely to be ever set by the game) | |
399 | list[0] |= 0x800000; | |
400 | ||
56f08d83 | 401 | if (len) { |
402 | left = check_cmd(list + 1, len); | |
403 | if (left) | |
deb18d24 | 404 | log_anomaly("GPUdmaChain: discarded %d/%d words\n", left, len); |
56f08d83 | 405 | } |
ddd56f6e | 406 | |
407 | if (addr & 0x800000) | |
408 | break; | |
409 | } | |
410 | ||
411 | // remove loop detection markers | |
412 | addr = start_addr & 0x1fffff; | |
413 | while (count-- > 0) { | |
414 | list = rambase + addr / 4; | |
415 | addr = list[0] & 0x1fffff; | |
416 | list[0] &= ~0x800000; | |
d30279e2 | 417 | } |
deb18d24 | 418 | if (llist_entry) |
419 | *llist_entry &= ~0x800000; | |
d30279e2 | 420 | |
deb18d24 | 421 | gpu.state.last_list.frame = gpu.state.frame_count; |
422 | gpu.state.last_list.hcnt = *gpu.state.hcnt; | |
423 | gpu.state.last_list.words = dma_words; | |
424 | gpu.state.last_list.addr = start_addr; | |
425 | ||
426 | return dma_words; | |
1ab64c54 GI |
427 | } |
428 | ||
d30279e2 GI |
429 | void GPUreadDataMem(uint32_t *mem, int count) |
430 | { | |
56f08d83 | 431 | log_io("gpu_dma_read %p %d\n", mem, count); |
432 | ||
d30279e2 GI |
433 | if (unlikely(gpu.cmd_len > 0)) |
434 | flush_cmd_buffer(); | |
56f08d83 | 435 | |
d30279e2 GI |
436 | if (gpu.dma.h) |
437 | do_vram_io(mem, count, 1); | |
438 | } | |
439 | ||
440 | uint32_t GPUreadData(void) | |
441 | { | |
56f08d83 | 442 | log_io("gpu_read\n"); |
443 | ||
444 | if (unlikely(gpu.cmd_len > 0)) | |
445 | flush_cmd_buffer(); | |
446 | ||
447 | if (gpu.dma.h) | |
6e9bdaef | 448 | do_vram_io(&gpu.gp0, 1, 1); |
56f08d83 | 449 | |
6e9bdaef | 450 | return gpu.gp0; |
d30279e2 GI |
451 | } |
452 | ||
453 | uint32_t GPUreadStatus(void) | |
454 | { | |
ddd56f6e | 455 | uint32_t ret; |
56f08d83 | 456 | |
d30279e2 GI |
457 | if (unlikely(gpu.cmd_len > 0)) |
458 | flush_cmd_buffer(); | |
459 | ||
ddd56f6e | 460 | ret = gpu.status.reg | (*gpu.lcf_hc << 31); |
461 | log_io("gpu_read_status %08x\n", ret); | |
462 | return ret; | |
d30279e2 GI |
463 | } |
464 | ||
1ab64c54 GI |
465 | typedef struct GPUFREEZETAG |
466 | { | |
467 | uint32_t ulFreezeVersion; // should be always 1 for now (set by main emu) | |
468 | uint32_t ulStatus; // current gpu status | |
469 | uint32_t ulControl[256]; // latest control register values | |
470 | unsigned char psxVRam[1024*1024*2]; // current VRam image (full 2 MB for ZN) | |
471 | } GPUFreeze_t; | |
472 | ||
473 | long GPUfreeze(uint32_t type, GPUFreeze_t *freeze) | |
474 | { | |
fc84f618 | 475 | int i; |
476 | ||
1ab64c54 GI |
477 | switch (type) { |
478 | case 1: // save | |
d30279e2 GI |
479 | if (gpu.cmd_len > 0) |
480 | flush_cmd_buffer(); | |
1ab64c54 GI |
481 | memcpy(freeze->psxVRam, gpu.vram, sizeof(gpu.vram)); |
482 | memcpy(freeze->ulControl, gpu.regs, sizeof(gpu.regs)); | |
6e9bdaef | 483 | memcpy(freeze->ulControl + 0xe0, gpu.ex_regs, sizeof(gpu.ex_regs)); |
1ab64c54 | 484 | freeze->ulStatus = gpu.status.reg; |
1ab64c54 GI |
485 | break; |
486 | case 0: // load | |
487 | memcpy(gpu.vram, freeze->psxVRam, sizeof(gpu.vram)); | |
488 | memcpy(gpu.regs, freeze->ulControl, sizeof(gpu.regs)); | |
6e9bdaef | 489 | memcpy(gpu.ex_regs, freeze->ulControl + 0xe0, sizeof(gpu.ex_regs)); |
1ab64c54 | 490 | gpu.status.reg = freeze->ulStatus; |
fc84f618 | 491 | for (i = 8; i > 0; i--) { |
492 | gpu.regs[i] ^= 1; // avoid reg change detection | |
493 | GPUwriteStatus((i << 24) | (gpu.regs[i] ^ 1)); | |
494 | } | |
1ab64c54 GI |
495 | break; |
496 | } | |
497 | ||
498 | return 1; | |
499 | } | |
500 | ||
d30279e2 | 501 | void GPUvBlank(int val, uint32_t *hcnt) |
1ab64c54 | 502 | { |
d30279e2 GI |
503 | gpu.lcf_hc = &gpu.zero; |
504 | if (gpu.status.interlace) { | |
505 | if (val) | |
506 | gpu.status.lcf ^= 1; | |
507 | } | |
508 | else { | |
509 | gpu.status.lcf = 0; | |
510 | if (!val) | |
511 | gpu.lcf_hc = hcnt; | |
512 | } | |
deb18d24 | 513 | if (!val) |
514 | gpu.state.frame_count++; | |
515 | ||
516 | gpu.state.hcnt = hcnt; | |
1ab64c54 GI |
517 | } |
518 | ||
1ab64c54 | 519 | // vim:shiftwidth=2:expandtab |