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(...) |
9394ada5 | 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 | { | |
9394ada5 | 93 | int ret; |
94 | ret = vout_init(); | |
95 | ret |= renderer_init(); | |
96 | ||
6e9bdaef | 97 | gpu.lcf_hc = &gpu.zero; |
deb18d24 | 98 | gpu.state.frame_count = 0; |
99 | gpu.state.hcnt = &gpu.zero; | |
9394ada5 | 100 | do_reset(); |
6e9bdaef | 101 | return ret; |
102 | } | |
103 | ||
104 | long GPUshutdown(void) | |
105 | { | |
106 | return vout_finish(); | |
107 | } | |
108 | ||
1ab64c54 GI |
109 | void GPUwriteStatus(uint32_t data) |
110 | { | |
111 | static const short hres[8] = { 256, 368, 320, 384, 512, 512, 640, 640 }; | |
112 | static const short vres[4] = { 240, 480, 256, 480 }; | |
113 | uint32_t cmd = data >> 24; | |
114 | ||
fc84f618 | 115 | if (cmd < ARRAY_SIZE(gpu.regs)) { |
116 | if (cmd != 0 && gpu.regs[cmd] == data) | |
117 | return; | |
8dd855cd | 118 | gpu.regs[cmd] = data; |
fc84f618 | 119 | } |
120 | ||
121 | gpu.state.fb_dirty = 1; | |
8dd855cd | 122 | |
123 | switch (cmd) { | |
1ab64c54 | 124 | case 0x00: |
6e9bdaef | 125 | do_reset(); |
1ab64c54 GI |
126 | break; |
127 | case 0x03: | |
d30279e2 | 128 | gpu.status.blanking = data & 1; |
1ab64c54 GI |
129 | break; |
130 | case 0x04: | |
131 | gpu.status.dma = data & 3; | |
132 | break; | |
133 | case 0x05: | |
134 | gpu.screen.x = data & 0x3ff; | |
135 | gpu.screen.y = (data >> 10) & 0x3ff; | |
fc84f618 | 136 | if (gpu.frameskip.enabled) |
137 | decide_frameskip(); | |
1ab64c54 | 138 | break; |
8dd855cd | 139 | case 0x06: |
140 | gpu.screen.x1 = data & 0xfff; | |
141 | gpu.screen.x2 = (data >> 12) & 0xfff; | |
142 | update_width(); | |
143 | break; | |
1ab64c54 GI |
144 | case 0x07: |
145 | gpu.screen.y1 = data & 0x3ff; | |
146 | gpu.screen.y2 = (data >> 10) & 0x3ff; | |
8dd855cd | 147 | update_height(); |
1ab64c54 GI |
148 | break; |
149 | case 0x08: | |
150 | gpu.status.reg = (gpu.status.reg & ~0x7f0000) | ((data & 0x3F) << 17) | ((data & 0x40) << 10); | |
8dd855cd | 151 | gpu.screen.hres = hres[(gpu.status.reg >> 16) & 7]; |
152 | gpu.screen.vres = vres[(gpu.status.reg >> 19) & 3]; | |
153 | update_width(); | |
154 | update_height(); | |
1ab64c54 | 155 | break; |
deb18d24 | 156 | default: |
157 | if ((cmd & 0xf0) == 0x10) | |
158 | get_gpu_info(data); | |
6e9bdaef | 159 | break; |
1ab64c54 | 160 | } |
1ab64c54 GI |
161 | } |
162 | ||
56f08d83 | 163 | const unsigned char cmd_lengths[256] = |
1ab64c54 | 164 | { |
d30279e2 GI |
165 | 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
166 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
167 | 3, 3, 3, 3, 6, 6, 6, 6, 4, 4, 4, 4, 8, 8, 8, 8, // 20 | |
168 | 5, 5, 5, 5, 8, 8, 8, 8, 7, 7, 7, 7, 11, 11, 11, 11, | |
169 | 2, 2, 2, 2, 0, 0, 0, 0, 3, 3, 3, 3, 3, 3, 3, 3, // 40 | |
170 | 3, 3, 3, 3, 0, 0, 0, 0, 4, 4, 4, 4, 4, 4, 4, 4, | |
171 | 2, 2, 2, 2, 3, 3, 3, 3, 1, 1, 1, 1, 2, 2, 2, 2, // 60 | |
172 | 1, 1, 1, 1, 2, 2, 2, 2, 1, 1, 1, 1, 2, 2, 2, 2, | |
173 | 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 80 | |
174 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
175 | 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // a0 | |
176 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
177 | 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // c0 | |
178 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
179 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // e0 | |
180 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
181 | }; | |
182 | ||
d30279e2 GI |
183 | #define VRAM_MEM_XY(x, y) &gpu.vram[(y) * 1024 + (x)] |
184 | ||
185 | static inline void do_vram_line(int x, int y, uint16_t *mem, int l, int is_read) | |
1ab64c54 | 186 | { |
d30279e2 GI |
187 | uint16_t *vram = VRAM_MEM_XY(x, y); |
188 | if (is_read) | |
189 | memcpy(mem, vram, l * 2); | |
190 | else | |
191 | memcpy(vram, mem, l * 2); | |
192 | } | |
193 | ||
194 | static int do_vram_io(uint32_t *data, int count, int is_read) | |
195 | { | |
196 | int count_initial = count; | |
197 | uint16_t *sdata = (uint16_t *)data; | |
198 | int x = gpu.dma.x, y = gpu.dma.y; | |
199 | int w = gpu.dma.w, h = gpu.dma.h; | |
ddd56f6e | 200 | int o = gpu.dma.offset; |
d30279e2 GI |
201 | int l; |
202 | count *= 2; // operate in 16bpp pixels | |
203 | ||
204 | if (gpu.dma.offset) { | |
205 | l = w - gpu.dma.offset; | |
ddd56f6e | 206 | if (count < l) |
d30279e2 | 207 | l = count; |
ddd56f6e | 208 | |
209 | do_vram_line(x + o, y, sdata, l, is_read); | |
210 | ||
211 | if (o + l < w) | |
212 | o += l; | |
213 | else { | |
214 | o = 0; | |
215 | y++; | |
216 | h--; | |
217 | } | |
d30279e2 GI |
218 | sdata += l; |
219 | count -= l; | |
d30279e2 GI |
220 | } |
221 | ||
222 | for (; h > 0 && count >= w; sdata += w, count -= w, y++, h--) { | |
223 | y &= 511; | |
224 | do_vram_line(x, y, sdata, w, is_read); | |
225 | } | |
226 | ||
227 | if (h > 0 && count > 0) { | |
228 | y &= 511; | |
229 | do_vram_line(x, y, sdata, count, is_read); | |
ddd56f6e | 230 | o = count; |
d30279e2 GI |
231 | count = 0; |
232 | } | |
d30279e2 GI |
233 | gpu.dma.y = y; |
234 | gpu.dma.h = h; | |
ddd56f6e | 235 | gpu.dma.offset = o; |
d30279e2 | 236 | |
6e9bdaef | 237 | return count_initial - count / 2; |
d30279e2 GI |
238 | } |
239 | ||
240 | static void start_vram_transfer(uint32_t pos_word, uint32_t size_word, int is_read) | |
241 | { | |
ddd56f6e | 242 | if (gpu.dma.h) |
243 | log_anomaly("start_vram_transfer while old unfinished\n"); | |
244 | ||
d30279e2 GI |
245 | gpu.dma.x = pos_word & 1023; |
246 | gpu.dma.y = (pos_word >> 16) & 511; | |
247 | gpu.dma.w = size_word & 0xffff; // ? | |
248 | gpu.dma.h = size_word >> 16; | |
249 | gpu.dma.offset = 0; | |
250 | ||
251 | if (is_read) | |
252 | gpu.status.img = 1; | |
9394ada5 | 253 | else |
254 | renderer_invalidate_caches(gpu.dma.x, gpu.dma.y, gpu.dma.w, gpu.dma.h); | |
d30279e2 | 255 | |
6e9bdaef | 256 | log_io("start_vram_transfer %c (%d, %d) %dx%d\n", is_read ? 'r' : 'w', |
257 | gpu.dma.x, gpu.dma.y, gpu.dma.w, gpu.dma.h); | |
d30279e2 GI |
258 | } |
259 | ||
260 | static int check_cmd(uint32_t *data, int count) | |
261 | { | |
262 | int len, cmd, start, pos; | |
fc84f618 | 263 | int vram_dirty = 0; |
d30279e2 | 264 | |
d30279e2 | 265 | // process buffer |
ddd56f6e | 266 | for (start = pos = 0; pos < count; ) |
d30279e2 GI |
267 | { |
268 | cmd = -1; | |
269 | len = 0; | |
270 | ||
271 | if (gpu.dma.h) { | |
272 | pos += do_vram_io(data + pos, count - pos, 0); | |
ddd56f6e | 273 | if (pos == count) |
274 | break; | |
d30279e2 GI |
275 | start = pos; |
276 | } | |
277 | ||
ddd56f6e | 278 | // do look-ahead pass to detect SR changes and VRAM i/o |
d30279e2 | 279 | while (pos < count) { |
56f08d83 | 280 | uint32_t *list = data + pos; |
281 | cmd = list[0] >> 24; | |
d30279e2 | 282 | len = 1 + cmd_lengths[cmd]; |
56f08d83 | 283 | |
d30279e2 | 284 | //printf(" %3d: %02x %d\n", pos, cmd, len); |
56f08d83 | 285 | if ((cmd & 0xf4) == 0x24) { |
286 | // flat textured prim | |
287 | gpu.status.reg &= ~0x1ff; | |
288 | gpu.status.reg |= list[4] & 0x1ff; | |
289 | } | |
290 | else if ((cmd & 0xf4) == 0x34) { | |
291 | // shaded textured prim | |
292 | gpu.status.reg &= ~0x1ff; | |
293 | gpu.status.reg |= list[5] & 0x1ff; | |
294 | } | |
295 | else switch (cmd) | |
296 | { | |
297 | case 0xe1: | |
298 | gpu.status.reg &= ~0x7ff; | |
299 | gpu.status.reg |= list[0] & 0x7ff; | |
300 | break; | |
301 | case 0xe6: | |
302 | gpu.status.reg &= ~0x1800; | |
303 | gpu.status.reg |= (list[0] & 3) << 11; | |
304 | break; | |
305 | } | |
fc84f618 | 306 | if (2 <= cmd && cmd < 0xc0) |
307 | vram_dirty = 1; | |
6e9bdaef | 308 | else if ((cmd & 0xf8) == 0xe0) |
309 | gpu.ex_regs[cmd & 7] = list[0]; | |
56f08d83 | 310 | |
d30279e2 GI |
311 | if (pos + len > count) { |
312 | cmd = -1; | |
313 | break; // incomplete cmd | |
314 | } | |
315 | if (cmd == 0xa0 || cmd == 0xc0) | |
316 | break; // image i/o | |
317 | pos += len; | |
318 | } | |
319 | ||
320 | if (pos - start > 0) { | |
fc84f618 | 321 | if (!gpu.frameskip.active) |
322 | do_cmd_list(data + start, pos - start); | |
d30279e2 GI |
323 | start = pos; |
324 | } | |
325 | ||
326 | if (cmd == 0xa0 || cmd == 0xc0) { | |
327 | // consume vram write/read cmd | |
328 | start_vram_transfer(data[pos + 1], data[pos + 2], cmd == 0xc0); | |
329 | pos += len; | |
330 | } | |
331 | ||
ddd56f6e | 332 | if (cmd == -1) |
333 | break; | |
d30279e2 | 334 | } |
ddd56f6e | 335 | |
fc84f618 | 336 | gpu.state.fb_dirty |= vram_dirty; |
337 | ||
ddd56f6e | 338 | return count - pos; |
d30279e2 GI |
339 | } |
340 | ||
341 | static void flush_cmd_buffer(void) | |
342 | { | |
343 | int left = check_cmd(gpu.cmd_buffer, gpu.cmd_len); | |
344 | if (left > 0) | |
345 | memmove(gpu.cmd_buffer, gpu.cmd_buffer + gpu.cmd_len - left, left * 4); | |
346 | gpu.cmd_len = left; | |
1ab64c54 GI |
347 | } |
348 | ||
349 | void GPUwriteDataMem(uint32_t *mem, int count) | |
350 | { | |
d30279e2 GI |
351 | int left; |
352 | ||
56f08d83 | 353 | log_io("gpu_dma_write %p %d\n", mem, count); |
354 | ||
d30279e2 GI |
355 | if (unlikely(gpu.cmd_len > 0)) |
356 | flush_cmd_buffer(); | |
56f08d83 | 357 | |
d30279e2 GI |
358 | left = check_cmd(mem, count); |
359 | if (left) | |
56f08d83 | 360 | log_anomaly("GPUwriteDataMem: discarded %d/%d words\n", left, count); |
1ab64c54 GI |
361 | } |
362 | ||
d30279e2 | 363 | void GPUwriteData(uint32_t data) |
1ab64c54 | 364 | { |
56f08d83 | 365 | log_io("gpu_write %08x\n", data); |
d30279e2 GI |
366 | gpu.cmd_buffer[gpu.cmd_len++] = data; |
367 | if (gpu.cmd_len >= CMD_BUFFER_LEN) | |
368 | flush_cmd_buffer(); | |
1ab64c54 GI |
369 | } |
370 | ||
ddd56f6e | 371 | long GPUdmaChain(uint32_t *rambase, uint32_t start_addr) |
1ab64c54 | 372 | { |
ddd56f6e | 373 | uint32_t addr, *list; |
deb18d24 | 374 | uint32_t *llist_entry = NULL; |
ddd56f6e | 375 | int len, left, count; |
deb18d24 | 376 | long dma_words = 0; |
d30279e2 GI |
377 | |
378 | if (unlikely(gpu.cmd_len > 0)) | |
379 | flush_cmd_buffer(); | |
380 | ||
deb18d24 | 381 | // ff7 sends it's main list twice, detect this |
382 | if (gpu.state.frame_count == gpu.state.last_list.frame && | |
383 | *gpu.state.hcnt - gpu.state.last_list.hcnt <= 1 && | |
384 | gpu.state.last_list.words > 1024) | |
385 | { | |
386 | llist_entry = rambase + (gpu.state.last_list.addr & 0x1fffff) / 4; | |
387 | *llist_entry |= 0x800000; | |
388 | } | |
389 | ||
56f08d83 | 390 | log_io("gpu_dma_chain\n"); |
ddd56f6e | 391 | addr = start_addr & 0xffffff; |
392 | for (count = 0; addr != 0xffffff; count++) | |
393 | { | |
ddd56f6e | 394 | list = rambase + (addr & 0x1fffff) / 4; |
d30279e2 GI |
395 | len = list[0] >> 24; |
396 | addr = list[0] & 0xffffff; | |
deb18d24 | 397 | dma_words += 1 + len; |
398 | ||
399 | log_io(".chain %08x #%d\n", (list - rambase) * 4, len); | |
ddd56f6e | 400 | |
401 | // loop detection marker | |
402 | // (bit23 set causes DMA error on real machine, so | |
403 | // unlikely to be ever set by the game) | |
404 | list[0] |= 0x800000; | |
405 | ||
56f08d83 | 406 | if (len) { |
407 | left = check_cmd(list + 1, len); | |
408 | if (left) | |
deb18d24 | 409 | log_anomaly("GPUdmaChain: discarded %d/%d words\n", left, len); |
56f08d83 | 410 | } |
ddd56f6e | 411 | |
412 | if (addr & 0x800000) | |
413 | break; | |
414 | } | |
415 | ||
416 | // remove loop detection markers | |
417 | addr = start_addr & 0x1fffff; | |
418 | while (count-- > 0) { | |
419 | list = rambase + addr / 4; | |
420 | addr = list[0] & 0x1fffff; | |
421 | list[0] &= ~0x800000; | |
d30279e2 | 422 | } |
deb18d24 | 423 | if (llist_entry) |
424 | *llist_entry &= ~0x800000; | |
d30279e2 | 425 | |
deb18d24 | 426 | gpu.state.last_list.frame = gpu.state.frame_count; |
427 | gpu.state.last_list.hcnt = *gpu.state.hcnt; | |
428 | gpu.state.last_list.words = dma_words; | |
429 | gpu.state.last_list.addr = start_addr; | |
430 | ||
431 | return dma_words; | |
1ab64c54 GI |
432 | } |
433 | ||
d30279e2 GI |
434 | void GPUreadDataMem(uint32_t *mem, int count) |
435 | { | |
56f08d83 | 436 | log_io("gpu_dma_read %p %d\n", mem, count); |
437 | ||
d30279e2 GI |
438 | if (unlikely(gpu.cmd_len > 0)) |
439 | flush_cmd_buffer(); | |
56f08d83 | 440 | |
d30279e2 GI |
441 | if (gpu.dma.h) |
442 | do_vram_io(mem, count, 1); | |
443 | } | |
444 | ||
445 | uint32_t GPUreadData(void) | |
446 | { | |
56f08d83 | 447 | log_io("gpu_read\n"); |
448 | ||
449 | if (unlikely(gpu.cmd_len > 0)) | |
450 | flush_cmd_buffer(); | |
451 | ||
452 | if (gpu.dma.h) | |
6e9bdaef | 453 | do_vram_io(&gpu.gp0, 1, 1); |
56f08d83 | 454 | |
6e9bdaef | 455 | return gpu.gp0; |
d30279e2 GI |
456 | } |
457 | ||
458 | uint32_t GPUreadStatus(void) | |
459 | { | |
ddd56f6e | 460 | uint32_t ret; |
56f08d83 | 461 | |
d30279e2 GI |
462 | if (unlikely(gpu.cmd_len > 0)) |
463 | flush_cmd_buffer(); | |
464 | ||
ddd56f6e | 465 | ret = gpu.status.reg | (*gpu.lcf_hc << 31); |
466 | log_io("gpu_read_status %08x\n", ret); | |
467 | return ret; | |
d30279e2 GI |
468 | } |
469 | ||
1ab64c54 GI |
470 | typedef struct GPUFREEZETAG |
471 | { | |
472 | uint32_t ulFreezeVersion; // should be always 1 for now (set by main emu) | |
473 | uint32_t ulStatus; // current gpu status | |
474 | uint32_t ulControl[256]; // latest control register values | |
475 | unsigned char psxVRam[1024*1024*2]; // current VRam image (full 2 MB for ZN) | |
476 | } GPUFreeze_t; | |
477 | ||
478 | long GPUfreeze(uint32_t type, GPUFreeze_t *freeze) | |
479 | { | |
fc84f618 | 480 | int i; |
481 | ||
1ab64c54 GI |
482 | switch (type) { |
483 | case 1: // save | |
d30279e2 GI |
484 | if (gpu.cmd_len > 0) |
485 | flush_cmd_buffer(); | |
1ab64c54 GI |
486 | memcpy(freeze->psxVRam, gpu.vram, sizeof(gpu.vram)); |
487 | memcpy(freeze->ulControl, gpu.regs, sizeof(gpu.regs)); | |
6e9bdaef | 488 | memcpy(freeze->ulControl + 0xe0, gpu.ex_regs, sizeof(gpu.ex_regs)); |
1ab64c54 | 489 | freeze->ulStatus = gpu.status.reg; |
1ab64c54 GI |
490 | break; |
491 | case 0: // load | |
9394ada5 | 492 | renderer_invalidate_caches(0, 0, 1024, 512); |
1ab64c54 GI |
493 | memcpy(gpu.vram, freeze->psxVRam, sizeof(gpu.vram)); |
494 | memcpy(gpu.regs, freeze->ulControl, sizeof(gpu.regs)); | |
6e9bdaef | 495 | memcpy(gpu.ex_regs, freeze->ulControl + 0xe0, sizeof(gpu.ex_regs)); |
1ab64c54 | 496 | gpu.status.reg = freeze->ulStatus; |
fc84f618 | 497 | for (i = 8; i > 0; i--) { |
498 | gpu.regs[i] ^= 1; // avoid reg change detection | |
499 | GPUwriteStatus((i << 24) | (gpu.regs[i] ^ 1)); | |
500 | } | |
1ab64c54 GI |
501 | break; |
502 | } | |
503 | ||
504 | return 1; | |
505 | } | |
506 | ||
d30279e2 | 507 | void GPUvBlank(int val, uint32_t *hcnt) |
1ab64c54 | 508 | { |
d30279e2 GI |
509 | gpu.lcf_hc = &gpu.zero; |
510 | if (gpu.status.interlace) { | |
511 | if (val) | |
512 | gpu.status.lcf ^= 1; | |
513 | } | |
514 | else { | |
515 | gpu.status.lcf = 0; | |
516 | if (!val) | |
517 | gpu.lcf_hc = hcnt; | |
518 | } | |
deb18d24 | 519 | if (!val) |
520 | gpu.state.frame_count++; | |
521 | ||
522 | gpu.state.hcnt = hcnt; | |
1ab64c54 GI |
523 | } |
524 | ||
1ab64c54 | 525 | // vim:shiftwidth=2:expandtab |