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Fix remaining bugs and fix indentation
[picodrive.git] / pico / draw_arm.S
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cff531af 1/*\r
2 * assembly optimized versions of most funtions from draw.c\r
ea38612f 3 * (C) notaz, 2006-2010,2017\r
cff531af 4 *\r
5 * This work is licensed under the terms of MAME license.\r
6 * See COPYING file in the top-level directory.\r
7 *\r
8 * this is highly specialized, be careful if changing related C code!\r
9 */\r
cc68a136 10\r
ea38612f 11#include "pico_int_o32.h"\r
12\r
cc68a136 13.extern DrawStripInterlace\r
5a681086 14\r
283fec1b 15.equ PDRAW_SPRITES_MOVED, (1<<0)\r
16.equ PDRAW_WND_DIFF_PRIO, (1<<1)\r
17.equ PDRAW_ACC_SPRITES, (1<<2)\r
18.equ PDRAW_DIRTY_SPRITES, (1<<4)\r
19.equ PDRAW_PLANE_HI_PRIO, (1<<6)\r
20.equ PDRAW_SHHI_DONE, (1<<7)\r
cc68a136 21\r
cf07a88d 22@ helpers\r
23.macro add_c24 d s c\r
24 add \d, \s, #(\c & 0x00ff00)\r
25.if \c & 0x0000ff\r
26 add \d, \d, #(\c & 0x0000ff)\r
27.endif\r
28.if \c & 0xff0000\r
29 add \d, \d, #(\c & 0xff0000)\r
30.endif\r
31.endm\r
32\r
cc68a136 33.macro TilePixel pat lsrr offs\r
34.if !\lsrr\r
35 ands r4, \pat, r2\r
36.else\r
37 ands r4, \pat, r2, lsr #\lsrr\r
38.endif\r
39 orrne r4, r3, r4\r
40 strneb r4, [r1,#\offs]\r
41.endm\r
42\r
43@ TileNorm (r1=pdest, r2=pixels8, r3=pal) r4: scratch, pat: register with helper pattern 0xf\r
44.macro TileNorm pat\r
45 TilePixel \pat, 12, 0 @ #0x0000f000\r
46 TilePixel \pat, 8, 1 @ #0x00000f00\r
47 TilePixel \pat, 4, 2 @ #0x000000f0\r
48 TilePixel \pat, 0, 3 @ #0x0000000f\r
49 TilePixel \pat, 28, 4 @ #0xf0000000\r
50 TilePixel \pat, 24, 5 @ #0x0f000000\r
51 TilePixel \pat, 20, 6 @ #0x00f00000\r
52 TilePixel \pat, 16, 7 @ #0x000f0000\r
53.endm\r
54\r
55@ TileFlip (r1=pdest, r2=pixels8, r3=pal) r4: scratch, pat: register with helper pattern 0xf\r
56.macro TileFlip pat\r
57 TilePixel \pat, 16, 0 @ #0x000f0000\r
58 TilePixel \pat, 20, 1 @ #0x00f00000\r
59 TilePixel \pat, 24, 2 @ #0x0f000000\r
60 TilePixel \pat, 28, 3 @ #0xf0000000\r
61 TilePixel \pat, 0, 4 @ #0x0000000f\r
62 TilePixel \pat, 4, 5 @ #0x000000f0\r
63 TilePixel \pat, 8, 6 @ #0x00000f00\r
64 TilePixel \pat, 12, 7 @ #0x0000f000\r
65.endm\r
66\r
67@ shadow/hilight mode\r
68\r
69@ this one is for hi priority layer\r
70.macro TilePixelShHP lsrr offs\r
71.if !\lsrr\r
72 ands r4, r12, r2\r
73.else\r
74 ands r4, r12, r2, lsr #\lsrr\r
75.endif\r
76 ldreqb r4, [r1,#\offs]\r
77 orrne r4, r3, r4\r
bfa12428 78 andeq r4, r4, #0xbf\r
07abbab1 79 strb r4, [r1,#\offs]\r
cc68a136 80.endm\r
81\r
7a7c6476 82@ TileNormShHP (r1=pdest, r2=pixels8, r3=pal) r4: scratch, r12: register with helper pattern 0xf, touches r3 high bits\r
cc68a136 83.macro TileNormShHP\r
84 TilePixelShHP 12, 0 @ #0x0000f000\r
85 TilePixelShHP 8, 1 @ #0x00000f00\r
86 TilePixelShHP 4, 2 @ #0x000000f0\r
87 TilePixelShHP 0, 3 @ #0x0000000f\r
88 TilePixelShHP 28, 4 @ #0xf0000000\r
89 TilePixelShHP 24, 5 @ #0x0f000000\r
90 TilePixelShHP 20, 6 @ #0x00f00000\r
91 TilePixelShHP 16, 7 @ #0x000f0000\r
92.endm\r
93\r
7a7c6476 94@ TileFlipShHP (r1=pdest, r2=pixels8, r3=pal) r4: scratch, pat: register with helper pattern 0xf\r
cc68a136 95.macro TileFlipShHP\r
96 TilePixelShHP 16, 0 @ #0x000f0000\r
97 TilePixelShHP 20, 1 @ #0x00f00000\r
98 TilePixelShHP 24, 2 @ #0x0f000000\r
99 TilePixelShHP 28, 3 @ #0xf0000000\r
100 TilePixelShHP 0, 4 @ #0x0000000f\r
101 TilePixelShHP 4, 5 @ #0x000000f0\r
102 TilePixelShHP 8, 6 @ #0x00000f00\r
103 TilePixelShHP 12, 7 @ #0x0000f000\r
104.endm\r
105\r
106\r
107@ TileSingleSh (r1=pdest, r2=pixels8, r3=pal) r4,r7: scratch, r0=sx; r12: helper pattern 0xf\r
108.macro TileSingleSh\r
109 tst r0, #1 @ not aligned?\r
110 mov r7, #0x00c000\r
111 orr r7, r7, #0xc0\r
112 ldrneb r4, [r1]\r
113 ldreqh r4, [r1]\r
114 orr r4, r4, r7\r
115 strneb r4, [r1], #1\r
116 streqh r4, [r1], #2\r
117 ldrh r4, [r1]\r
118 orr r4, r4, r7\r
119 strh r4, [r1], #2\r
120 ldrh r4, [r1]\r
121 orr r4, r4, r7\r
122 strh r4, [r1], #2\r
123 ldrh r4, [r1]\r
124 orr r4, r4, r7\r
125 strh r4, [r1], #2\r
126 ldrneb r4, [r1]\r
127 orr r4, r4, r7\r
128 strneb r4, [r1], #1\r
129.endm\r
130\r
131@ TileSingleHi (r1=pdest, r2=pixels8, r3=pal) r4,r7: scratch, r0=sx, r12: register with helper pattern 0xf\r
132.macro TileSingleHi\r
133 tst r1, #1 @ not aligned?\r
134 mov r7, #0x008000\r
135 orr r7, r7, #0x80\r
136 ldrneb r4, [r1], #1\r
137 ldreqh r4, [r1], #2 @ 1ci\r
138 ldrh r12, [r1], #2\r
139 bic r4, r4, r7, lsr #1\r
140 orr r4, r4, r7\r
141 strneb r4, [r1, #-3]\r
142 streqh r4, [r1, #-4]\r
143 ldrh r4, [r1], #2\r
144 bic r12, r12, r7, lsr #1\r
145 orr r12, r12, r7\r
146 strh r12, [r1, #-4]\r
147 ldrh r12, [r1], #2\r
148 bic r4, r4, r7, lsr #1\r
149 orr r4, r4, r7\r
150 strh r4, [r1, #-4]\r
151 ldrneb r4, [r1]\r
152 bic r12, r12, r7, lsr #1\r
153 orr r12, r12, r7\r
154 strh r12, [r1, #-2]\r
155 bicne r4, r4, r7, lsr #1\r
156 orrne r4, r4, r7\r
157 strneb r4, [r1], #1\r
158 mov r12, #0xf\r
159.endm\r
160\r
161.macro TileDoShGenPixel shift ofs\r
162.if \shift\r
163 ands r4, r12, r2, lsr #\shift\r
164.else\r
165 ands r4, r12, r2\r
166.endif\r
07abbab1 167 beq 0f\r
cc68a136 168 cmp r4, #0xe\r
bfa12428 169 ldrgeb r7, [r1,#\ofs]\r
170 orrlt r7, r3, r4 @ normal\r
07abbab1 171\r
bfa12428 172 bicge r7, r7, #0xc0\r
173 orrge r7, r7, r4, lsl #6\r
174 strb r7, [r1,#\ofs]\r
07abbab1 1750:\r
cc68a136 176.endm\r
177\r
178@ TileFlipSh (r1=pdest, r2=pixels8, r3=pal) r4,r7: scratch, r0=sx, r12: register with helper pattern 0xf\r
179.macro TileFlipSh\r
180 TileDoShGenPixel 16, 0 @ #0x000f0000\r
181 TileDoShGenPixel 20, 1 @ #0x00f00000\r
182 TileDoShGenPixel 24, 2 @ #0x0f000000\r
183 TileDoShGenPixel 28, 3 @ #0xf0000000\r
184 TileDoShGenPixel 0, 4 @ #0x0000000f\r
185 TileDoShGenPixel 4, 5 @ #0x000000f0\r
186 TileDoShGenPixel 8, 6 @ #0x00000f00\r
187 TileDoShGenPixel 12, 7 @ #0x0000f000\r
188.endm\r
189\r
190@ TileNormSh (r1=pdest, r2=pixels8, r3=pal) r4,r7: scratch, r0=sx, r12: register with helper pattern 0xf\r
191.macro TileNormSh\r
192 TileDoShGenPixel 12, 0 @ #0x0000f000\r
193 TileDoShGenPixel 8, 1 @ #0x00000f00\r
194 TileDoShGenPixel 4, 2 @ #0x000000f0\r
195 TileDoShGenPixel 0, 3 @ #0x0000000f\r
196 TileDoShGenPixel 28, 4 @ #0xf0000000\r
197 TileDoShGenPixel 24, 5 @ #0x0f000000\r
198 TileDoShGenPixel 20, 6 @ #0x00f00000\r
199 TileDoShGenPixel 16, 7 @ #0x000f0000\r
200.endm\r
201\r
bfa12428 202.macro TileDoShGenPixel_markop shift ofs\r
07abbab1 203.if \shift\r
bfa12428 204 ands r4, r12, r2, lsr #\shift\r
07abbab1 205.else\r
bfa12428 206 ands r4, r12, r2\r
07abbab1 207.endif\r
bfa12428 208 beq 0f\r
209 cmp r4, #0xe\r
210 ldrgeb r4, [r1,#\ofs]\r
211 orrlt r4, r3, r4\r
e54507e8 212 orrge r4, r4, #0x80\r
bfa12428 213 strb r4, [r1,#\ofs]\r
2140:\r
07abbab1 215.endm\r
216\r
e54507e8 217.macro TileFlipSh_markop\r
bfa12428 218 TileDoShGenPixel_markop 16, 0 @ #0x000f0000\r
219 TileDoShGenPixel_markop 20, 1 @ #0x00f00000\r
220 TileDoShGenPixel_markop 24, 2 @ #0x0f000000\r
221 TileDoShGenPixel_markop 28, 3 @ #0xf0000000\r
222 TileDoShGenPixel_markop 0, 4 @ #0x0000000f\r
223 TileDoShGenPixel_markop 4, 5 @ #0x000000f0\r
224 TileDoShGenPixel_markop 8, 6 @ #0x00000f00\r
225 TileDoShGenPixel_markop 12, 7 @ #0x0000f000\r
07abbab1 226.endm\r
227\r
e54507e8 228.macro TileNormSh_markop\r
bfa12428 229 TileDoShGenPixel_markop 12, 0 @ #0x0000f000\r
230 TileDoShGenPixel_markop 8, 1 @ #0x00000f00\r
231 TileDoShGenPixel_markop 4, 2 @ #0x000000f0\r
232 TileDoShGenPixel_markop 0, 3 @ #0x0000000f\r
233 TileDoShGenPixel_markop 28, 4 @ #0xf0000000\r
234 TileDoShGenPixel_markop 24, 5 @ #0x0f000000\r
235 TileDoShGenPixel_markop 20, 6 @ #0x00f00000\r
236 TileDoShGenPixel_markop 16, 7 @ #0x000f0000\r
07abbab1 237.endm\r
238\r
239.macro TileDoShGenPixel_onlyop_lp shift ofs\r
240.if \shift\r
241 ands r7, r12, r2, lsr #\shift\r
242.else\r
243 ands r7, r12, r2\r
244.endif\r
245 ldrneb r4, [r1,#\ofs]\r
07abbab1 246 cmp r7, #0xe\r
bfa12428 247 blt 0f\r
248\r
249 tst r4, #0xc0\r
250 bicne r4, r4, #0xc0\r
251 orrne r4, r4, r7, lsl #6\r
252 strneb r4, [r1,#\ofs]\r
07abbab1 2530:\r
254.endm\r
255\r
256.macro TileFlipSh_onlyop_lp\r
257 TileDoShGenPixel_onlyop_lp 16, 0 @ #0x000f0000\r
258 TileDoShGenPixel_onlyop_lp 20, 1 @ #0x00f00000\r
259 TileDoShGenPixel_onlyop_lp 24, 2 @ #0x0f000000\r
260 TileDoShGenPixel_onlyop_lp 28, 3 @ #0xf0000000\r
261 TileDoShGenPixel_onlyop_lp 0, 4 @ #0x0000000f\r
262 TileDoShGenPixel_onlyop_lp 4, 5 @ #0x000000f0\r
263 TileDoShGenPixel_onlyop_lp 8, 6 @ #0x00000f00\r
264 TileDoShGenPixel_onlyop_lp 12, 7 @ #0x0000f000\r
265.endm\r
266\r
267.macro TileNormSh_onlyop_lp\r
268 TileDoShGenPixel_onlyop_lp 12, 0 @ #0x0000f000\r
269 TileDoShGenPixel_onlyop_lp 8, 1 @ #0x00000f00\r
270 TileDoShGenPixel_onlyop_lp 4, 2 @ #0x000000f0\r
271 TileDoShGenPixel_onlyop_lp 0, 3 @ #0x0000000f\r
272 TileDoShGenPixel_onlyop_lp 28, 4 @ #0xf0000000\r
273 TileDoShGenPixel_onlyop_lp 24, 5 @ #0x0f000000\r
274 TileDoShGenPixel_onlyop_lp 20, 6 @ #0x00f00000\r
275 TileDoShGenPixel_onlyop_lp 16, 7 @ #0x000f0000\r
276.endm\r
277\r
cc68a136 278\r
279@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
280\r
281@ struct TileStrip\r
282@ {\r
283@ int nametab; // 0x00\r
284@ int line; // 0x04\r
285@ int hscroll; // 0x08\r
286@ int xmask; // 0x0C\r
287@ int *hc; // 0x10 (pointer to cache buffer)\r
288@ int cells; // 0x14\r
289@ };\r
290\r
e0bcb7a9 291@ void DrawLayer(int lflags, int *hcache, int cellskip, int maxcells,\r
ea38612f 292@ struct PicoEState *est)\r
cc68a136 293\r
83c093a4 294.global DrawLayer\r
cc68a136 295\r
296DrawLayer:\r
ea38612f 297 ldr r12, [sp] @ est\r
cc68a136 298 stmfd sp!, {r4-r11,lr}\r
299\r
88fd63ad 300 ldr r11, [r12, #OFS_EST_Pico]\r
cc68a136 301 mov r8, #1\r
302\r
88fd63ad 303 ldrb r7, [r11, #OFS_Pico_video_reg+16] @ ??vv??hh\r
cc68a136 304\r
305 mov r6, r1 @ hcache\r
e0bcb7a9 306 orr r9, r3, r0, lsl #29 @ r9=force[31]|sh[30]|plane[29]\r
307 orr r9, r9, r2, lsl #8 @ |cellskip[15:8]|maxcells[7:0] (tmp)\r
cc68a136 308\r
309 mov r1, r7, lsl #4\r
310 orr r1, r1, #0x00ff\r
311\r
312 and r10, r7, #3\r
313 cmp r10, #1\r
314 biclt r1, r1, #0xfc00\r
315 biceq r1, r1, #0xfe00\r
eced0190 316 cmp r10, #2\r
317 moveq r1, #0x0007\r
318 movgt r1, #0x00ff @ r1=ymask=(height<<8)|0xff; ...; // Y Mask in pixels\r
cc68a136 319\r
320 add r10, r10, #5\r
321 cmp r10, #7\r
322 subge r10, r10, #1 @ r10=shift[width] (5,6,6,7)\r
323\r
88fd63ad 324 ldr r2, [r12, #OFS_EST_DrawScanline]\r
325 ldr lr, [r12, #OFS_EST_PicoMem_vram]\r
cc68a136 326\r
327 @ Find name table:\r
83c093a4 328 ands r0, r0, #1\r
88fd63ad 329 ldreqb r12, [r11, #OFS_Pico_video_reg+2]\r
330 ldrneb r12, [r11, #OFS_Pico_video_reg+4]\r
cc68a136 331\r
ea38612f 332 @ calculate xmask:\r
333 mov r5, r8, lsl r10\r
334 sub r5, r5, #1 @ r5=xmask\r
cc68a136 335\r
336 moveq r12, r12, lsl #10\r
337 movne r12, r12, lsl #13\r
338 and r12, r12, #(7<<13) @ r12=(ts->nametab<<1) (halfword compliant)\r
339\r
88fd63ad 340 ldrh r8, [r11, #OFS_Pico_video_reg+12]\r
341 ldrb r7, [r11, #OFS_Pico_video_reg+11]\r
cc68a136 342\r
343 mov r4, r8, lsr #8 @ pvid->reg[13]\r
344 mov r4, r4, lsl #10 @ htab=pvid->reg[13]<<9; (halfwords)\r
345 tst r7, #2\r
b6d7ac70 346 addne r4, r4, r2, lsl #2 @ htab+=DrawScanline<<1; // Offset by line\r
cc68a136 347 tst r7, #1\r
348 biceq r4, r4, #0x1f @ htab&=~0xf; // Offset by tile\r
349 add r4, r4, r0, lsl #1 @ htab+=plane\r
350 bic r4, r4, #0x00ff0000 @ just in case\r
351 ldrh r3, [lr, r4] @ r3=hscroll\r
352\r
353 tst r7, #4\r
354 bne .DrawStrip_vsscroll\r
355\r
356 @ Get vertical scroll value:\r
cf07a88d 357 add_c24 r7, lr, (OFS_PMEM_vsram-OFS_PMEM_vram)\r
cc68a136 358 ldr r7, [r7]\r
359\r
360 tst r8, #2\r
361 tstne r8, #4\r
362 bne .DrawStrip_interlace\r
363\r
364 tst r0, r0\r
365 movne r7, r7, lsr #16\r
366\r
367 @ Find the line in the name table\r
368 add r2, r2, r7\r
369 and r2, r2, r1\r
370 mov r4, r2, lsr #3\r
371 add r10, r10, #1 @ shift[width]++\r
372 add r12, r12, r4, lsl r10 @ nametab+=(ts.line>>3)<<shift[width];\r
373\r
374 @ ldmia r0, {r1,r2,r3,r5,r6,r9} @ r2=line, r3=ts->hscroll, r5=ts->xmask, r6=ts->hc, r9=ts->cells\r
cc68a136 375\r
376 and r10,r2, #7\r
377 mov r10,r10, lsl #1 @ r10=ty=(ts->line&7)<<1;\r
378 orr r10,r10, r9, lsl #24\r
379\r
380 rsb r8, r3, #0\r
381 mov r8, r8, lsr #3 @ r8=tilex=(-ts->hscroll)>>3\r
382\r
383 sub r1, r3, #1\r
384 and r1, r1, #7\r
385 add r7, r1, #1 @ r7=dx=((ts->hscroll-1)&7)+1\r
386\r
e0bcb7a9 387 movs r3, r9, lsl #1 @ (force[31]|sh[30]) << 1\r
cc68a136 388 mov r3, #0\r
e0bcb7a9 389 orrmi r10,r10, #1<<23 @ r10=cells[31:24]|sh[23]|hi_not_empty[22]\r
390 orrcs r10,r10, #1<<20 @ |had_output[21]|force[20]|ty[15:0]\r
391 movmi r3, #0x40 @ default to shadowed pal on sh mode\r
cc68a136 392\r
cc68a136 393 cmp r7, #8\r
394 addne r10,r10, #0x01000000 @ we will loop cells+1 times if there is scroll\r
395\r
83c093a4 396 and r9, r9, #0xff00\r
397 add r8, r8, r9, lsr #8 @ tilex+=cellskip\r
398 add r7, r7, r9, lsr #5 @ dx+=cellskip<<3;\r
399 sub r10,r10,r9, lsl #16 @ cells-=cellskip\r
83c093a4 400\r
cc68a136 401 @ cache some stuff to avoid mem access\r
99bdfd31 402 ldr r11,[sp, #9*4] @ est\r
cc68a136 403 mov r0, #0xf\r
88fd63ad 404 ldr r11,[r11, #OFS_EST_HighCol]\r
ea8c405f 405\r
406 mvn r9, #0 @ r9=prevcode=-1\r
99bdfd31 407 add r1, r11, r7 @ r1=pdest\r
cc68a136 408\r
409\r
410 @ r4 & r7 are scratch in this loop\r
411.dsloop_subr1:\r
412 sub r1, r1, #8\r
413.dsloop: @ 40-41 times\r
414 subs r10,r10, #0x01000000\r
415 bmi .dsloop_exit\r
416\r
417.dsloop_enter:\r
418 and r7, r5, r8\r
419 add r7, lr, r7, lsl #1 @ Pico.vram+((tilex&ts->xmask) as halfwords)\r
420 ldrh r7, [r7, r12] @ r7=code (int, but from unsigned, no sign extend)\r
421\r
422 add r1, r1, #8\r
423 add r8, r8, #1\r
424\r
425 tst r7, #0x8000\r
e0bcb7a9 426 tsteq r10, #1<<20 @ force?\r
cc68a136 427 bne .DrawStrip_hiprio\r
428\r
429 cmp r7, r9\r
430 beq .DrawStrip_samecode @ we know stuff about this tile already\r
431\r
432 mov r9, r7 @ remember code\r
740da8c6 433 orr r10, r10, #1<<21 @ seen non hi-prio tile\r
cc68a136 434\r
435 movs r2, r9, lsl #20 @ if (code&0x1000)\r
436 mov r2, r2, lsl #1\r
437 add r2, r2, r10, lsl #17\r
438 mov r2, r2, lsr #17\r
439 eorcs r2, r2, #0x0e @ if (code&0x1000) addr^=0xe;\r
440\r
441 ldr r2, [lr, r2, lsl #1] @ pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
442\r
443 bic r7, r3, #0x3f\r
444 and r3, r9, #0x6000\r
445 add r3, r7, r3, lsr #9 @ r3=pal=((code&0x6000)>>9);\r
446\r
447.DrawStrip_samecode:\r
448 tst r2, r2\r
449 beq .dsloop @ tileline blank\r
450\r
451 cmp r2, r2, ror #4\r
452 beq .DrawStrip_SingleColor @ tileline singlecolor \r
453\r
454 tst r9, #0x0800\r
7a7c6476 455 bne .DrawStrip_TileFlip\r
cc68a136 456\r
457 @ (r1=pdest, r2=pixels8, r3=pal) r4: scratch, r0: helper pattern\r
cc68a136 458.DrawStrip_TileNorm:\r
459 TileNorm r0\r
460 b .dsloop\r
461\r
7a7c6476 462.DrawStrip_TileFlip:\r
463 TileFlip r0\r
464 b .dsloop\r
465\r
cc68a136 466.DrawStrip_SingleColor:\r
467 and r4, r2, #0xf\r
468 orr r4, r3, r4\r
469 orr r4, r4, r4, lsl #8\r
470 tst r1, #1 @ not aligned?\r
471 strneb r4, [r1], #1\r
472 streqh r4, [r1], #2\r
473 strh r4, [r1], #2\r
474 strh r4, [r1], #2\r
475 strh r4, [r1], #2\r
476 strneb r4, [r1], #1 @ have a remaining unaligned pixel?\r
477 b .dsloop_subr1\r
478\r
cc68a136 479.DrawStrip_hiprio_maybempt:\r
480 cmp r7, r9\r
481 beq .dsloop @ must've been empty, otherwise we wouldn't get here\r
482 movs r2, r7, lsl #20 @ if (code&0x1000)\r
483 mov r2, r2, lsl #1\r
484 add r2, r2, r10, lsl #17\r
485 mov r2, r2, lsr #17\r
486 eorcs r2, r2, #0x0e @ if (code&0x1000) addr^=0xe;\r
487 ldr r2, [lr, r2, lsl #1] @ pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
488 mov r9, r7 @ remember code\r
489 tst r2, r2\r
740da8c6 490 beq .dsloop\r
491 orr r10, r10, #1<<22\r
492\r
493.DrawStrip_hiprio:\r
e0bcb7a9 494 tst r10, #0x00d00000 @ sh[23]|hi_not_empty[22]|force[20]\r
740da8c6 495 beq .DrawStrip_hiprio_maybempt\r
496 sub r0, r1, r11\r
497 orr r7, r7, r0, lsl #16\r
498 orr r7, r7, r10, lsl #25 @ (ty<<25)\r
499 tst r7, #0x1000\r
500 eorne r7, r7, #7<<26 @ if(code&0x1000) cval^=7<<26;\r
501 str r7, [r6], #4 @ cache hi priority tile\r
502 mov r0, #0xf\r
cc68a136 503 b .dsloop\r
504\r
505.dsloop_exit:\r
740da8c6 506 tst r10, #1<<21 @ seen non hi-prio tile\r
ea38612f 507 ldr r1, [sp, #9*4] @ est\r
cc68a136 508 mov r0, #0\r
88fd63ad 509 ldreq r2, [r1, #OFS_EST_rendstatus]\r
cc68a136 510 str r0, [r6] @ terminate the cache list\r
283fec1b 511 orreq r2, r2, #PDRAW_PLANE_HI_PRIO @ had a layer with all hi-prio tiles\r
88fd63ad 512 streq r2, [r1, #OFS_EST_rendstatus]\r
cc68a136 513\r
514 ldmfd sp!, {r4-r11,lr}\r
515 bx lr\r
516\r
6d7acf9e 517@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
cc68a136 518\r
519.DrawStrip_vsscroll:\r
6d7acf9e 520 rsb r8, r3, #0\r
521 mov r8, r8, lsr #3 @ r8=tilex=(-ts->hscroll)>>3\r
7b802576 522 bic r8, r8, #0x3fc00000\r
523 orr r8, r8, r5, lsl #25 @ r8=(xmask[31:25]|had_output[24]|tilex[21:0])\r
cc68a136 524\r
ea38612f 525 ldr r11, [sp, #9*4] @ est\r
6d7acf9e 526 orr r5, r1, r10, lsl #24\r
88fd63ad 527 ldr r4, [r11, #OFS_EST_DrawScanline]\r
6d7acf9e 528 sub r1, r3, #1\r
529 orr r5, r5, r4, lsl #16 @ r5=(shift_width[31:24]|scanline[23:16]|ymask[15:0])\r
530 and r1, r1, #7\r
531 add r7, r1, #1 @ r7=dx=((ts->hscroll-1)&7)+1\r
cc68a136 532\r
6d7acf9e 533 mov r10,r9, lsl #16\r
cf07a88d 534 orr r10,r10, #0xff000000 @ will be adjusted on entering loop\r
83c093a4 535 tst r0, #1\r
6d7acf9e 536 orrne r10,r10, #0x8000\r
cf07a88d 537 tst r3, #0x0f @ hscroll & 0x0f?\r
538 beq 0f\r
539 eor r3, r3, r7\r
540 sub r10,r10, #1<<24 @ cell-- // start from negative for hscroll\r
541 tst r3, #0x08\r
542 subne r10,r10, #1<<16 @ cells--\r
543 subne r10,r10, #1<<24 @ cell-- // even more negative\r
5440:\r
6d7acf9e 545 tst r9, #1<<31\r
546 mov r3, #0\r
83c093a4 547 orrne r10,r10, #1<<23 @ r10=(cell[31:24]|sh[23]|hi_not_empty[22]|cells_max[21:16]|plane[15]|ty[14:0])\r
6d7acf9e 548 movne r3, #0x40 @ default to shadowed pal on sh mode\r
cc68a136 549\r
83c093a4 550 and r9, r9, #0xff00\r
551 add r8, r8, r9, lsr #8 @ tilex+=cellskip\r
552 add r7, r7, r9, lsr #5 @ dx+=cellskip<<3;\r
553 add r10,r10,r9, lsl #16 @ cell+=cellskip\r
cc68a136 554\r
6d7acf9e 555 @ cache some stuff to avoid mem access\r
99bdfd31 556 ldr r11,[sp, #9*4] @ est\r
ea8c405f 557 mov r0, #0xf\r
88fd63ad 558 ldr r11,[r11, #OFS_EST_HighCol]\r
6d7acf9e 559\r
ea8c405f 560 mvn r9, #0 @ r9=prevcode=-1\r
561 add r1, r11, r7 @ r1=pdest\r
6d7acf9e 562\r
563 @ r4 & r7 are scratch in this loop\r
564.dsloop_vs_subr1:\r
565 sub r1, r1, #8\r
566.dsloop_vs: @ 40-41 times\r
567 add r10,r10, #0x01000000\r
568 and r4, r10, #0x003f0000\r
569 cmp r4, r10, asr #8\r
740da8c6 570 ble .dsloop_vs_exit\r
6d7acf9e 571\r
572 @ calc offset and read tileline code to r7, also calc ty\r
cf07a88d 573 add_c24 r7, lr, (OFS_PMEM_vsram-OFS_PMEM_vram)\r
6d7acf9e 574 add r7, r7, r10,asr #23 @ vsram + ((cell&~1)<<1)\r
575 bic r7, r7, #3\r
576 tst r10,#0x8000 @ plane1?\r
577 addne r7, r7, #2\r
578 ldrh r7, [r7] @ r7=vscroll\r
579\r
580 bic r10,r10,#0xff @ clear old ty\r
7b802576 581 and r4, r5, #0xff0000 @ scanline\r
582 add r4, r4, r7, lsl #16 @ ... += vscroll\r
583 and r4, r4, r5, lsl #16 @ ... &= ymask\r
6d7acf9e 584 and r7, r4, #0x70000\r
585 orr r10,r10,r7, lsr #15 @ new ty\r
586\r
587 mov r4, r4, lsr #19\r
588 mov r7, r5, lsr #24\r
589 mov r4, r4, lsl r7 @ nametabadd\r
590\r
591 and r7, r8, r8, lsr #25\r
88fd63ad 592 add r7, lr, r7, lsl #1 @ PicoMem.vram+((tilex&ts->xmask) as halfwords)\r
6d7acf9e 593 add r7, r7, r4, lsl #1\r
594 ldrh r7, [r7, r12] @ r7=code (int, but from unsigned, no sign extend)\r
595\r
596 add r1, r1, #8\r
597 add r8, r8, #1\r
598\r
599 tst r7, #0x8000\r
600 bne .DrawStrip_vs_hiprio\r
601\r
602 cmp r7, r9\r
603 beq .DrawStrip_vs_samecode @ we know stuff about this tile already\r
604\r
605 mov r9, r7 @ remember code\r
7b802576 606 orr r8, r8, #(1<<24)@ seen non hi-prio tile\r
6d7acf9e 607\r
608 movs r2, r9, lsl #20 @ if (code&0x1000)\r
609 mov r2, r2, lsl #1\r
610 add r2, r2, r10, lsl #17\r
611 mov r2, r2, lsr #17\r
612 eorcs r2, r2, #0x0e @ if (code&0x1000) addr^=0xe;\r
613\r
88fd63ad 614 ldr r2, [lr, r2, lsl #1] @ pack=*(unsigned int *)(PicoMem.vram+addr); // Get 8 pixels\r
6d7acf9e 615\r
616 bic r7, r3, #0x3f\r
617 and r3, r9, #0x6000\r
618 add r3, r7, r3, lsr #9 @ r3=pal=((code&0x6000)>>9);\r
619\r
620.DrawStrip_vs_samecode:\r
621 tst r2, r2\r
622 beq .dsloop_vs @ tileline blank\r
623\r
624 cmp r2, r2, ror #4\r
625 beq .DrawStrip_vs_SingleColor @ tileline singlecolor \r
626\r
627 tst r9, #0x0800\r
7a7c6476 628 bne .DrawStrip_vs_TileFlip\r
6d7acf9e 629\r
630 @ (r1=pdest, r2=pixels8, r3=pal) r4: scratch, r0: helper pattern\r
6d7acf9e 631.DrawStrip_vs_TileNorm:\r
632 TileNorm r0\r
633 b .dsloop_vs\r
634\r
7a7c6476 635.DrawStrip_vs_TileFlip:\r
636 TileFlip r0\r
637 b .dsloop_vs\r
638\r
6d7acf9e 639.DrawStrip_vs_SingleColor:\r
640 and r4, r2, #0xf\r
641 orr r4, r3, r4\r
642 orr r4, r4, r4, lsl #8\r
643 tst r1, #1 @ not aligned?\r
644 strneb r4, [r1], #1\r
645 streqh r4, [r1], #2\r
646 strh r4, [r1], #2\r
647 strh r4, [r1], #2\r
648 strh r4, [r1], #2\r
649 strneb r4, [r1], #1 @ have a remaining unaligned pixel?\r
650 b .dsloop_vs_subr1\r
651\r
652.DrawStrip_vs_hiprio:\r
653 tst r10, #0x00c00000\r
654 beq .DrawStrip_vs_hiprio_maybempt\r
655 sub r0, r1, r11\r
656 orr r7, r7, r0, lsl #16\r
657 orr r7, r7, r10, lsl #25 @ (ty<<25)\r
658 tst r7, #0x1000\r
659 eorne r7, r7, #7<<26 @ if(code&0x1000) cval^=7<<26;\r
660 str r7, [r6], #4 @ cache hi priority tile\r
661 mov r0, #0xf\r
662 b .dsloop_vs\r
663\r
664.DrawStrip_vs_hiprio_maybempt:\r
665 cmp r7, r9\r
666 beq .dsloop_vs @ must've been empty, otherwise we wouldn't get here\r
667 movs r2, r7, lsl #20 @ if (code&0x1000)\r
668 mov r2, r2, lsl #1\r
669 add r2, r2, r10, lsl #17\r
670 mov r2, r2, lsr #17\r
671 eorcs r2, r2, #0x0e @ if (code&0x1000) addr^=0xe;\r
88fd63ad 672 ldr r2, [lr, r2, lsl #1] @ pack=*(unsigned int *)(PicoMem.vram+addr); // Get 8 pixels\r
6d7acf9e 673 mov r9, r7 @ remember code\r
674 tst r2, r2\r
675 orrne r10, r10, #1<<22\r
676 bne .DrawStrip_vs_hiprio\r
677 b .dsloop_vs\r
678\r
740da8c6 679.dsloop_vs_exit:\r
7b802576 680 tst r8, #(1<<24) @ seen non hi-prio tile\r
ea38612f 681 ldr r1, [sp, #9*4] @ est\r
740da8c6 682 mov r0, #0\r
88fd63ad 683 ldreq r2, [r1, #OFS_EST_rendstatus]\r
740da8c6 684 str r0, [r6] @ terminate the cache list\r
283fec1b 685 orreq r2, r2, #PDRAW_PLANE_HI_PRIO @ had a layer with all hi-prio tiles\r
88fd63ad 686 streq r2, [r1, #OFS_EST_rendstatus]\r
740da8c6 687\r
688 ldmfd sp!, {r4-r11,lr}\r
689 bx lr\r
690\r
6d7acf9e 691\r
692@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
cc68a136 693\r
694@ interlace mode 2? Sonic 2?\r
695.DrawStrip_interlace:\r
696 tst r0, r0\r
697 moveq r7, r7, lsl #21\r
698 movne r7, r7, lsl #5\r
699\r
700 @ Find the line in the name table\r
b6d7ac70 701 add r2, r7, r2, lsl #22 @ r2=(vscroll+(DrawScanline<<1))<<21 (11 bits);\r
cc68a136 702 orr r1, r1, #0x80000000\r
703 and r2, r2, r1, ror #10 @ &((ymask<<1)|1)<<21;\r
704 mov r2, r2, lsr #21\r
705 mov r4, r2, lsr #4\r
706 mov r12, r12, lsr #1 @ halfwords\r
707 add r0, r12, r4, lsl r10 @ nametab+=(ts.line>>4)<<shift[width];\r
708 and r9, r9, #0xff\r
709\r
710 sub sp, sp, #6*4\r
711 stmia sp, {r0,r2,r3,r5,r6,r9}\r
712\r
713 mov r0, sp\r
714 bl DrawStripInterlace @ struct TileStrip *ts\r
715\r
716 add sp, sp, #6*4\r
717 ldmfd sp!, {r4-r11,lr}\r
718 bx lr\r
719\r
720.pool\r
721\r
722@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
723\r
99bdfd31 724@ void BackFill(int reg7, int sh, struct PicoEState *est)\r
cc68a136 725\r
99bdfd31 726.global BackFill\r
cc68a136 727\r
728BackFill:\r
729 stmfd sp!, {r4-r9,lr}\r
730\r
ea8c405f 731 mov r0, r0, lsl #26\r
88fd63ad 732 ldr lr, [r2, #OFS_EST_HighCol]\r
ea8c405f 733 mov r0, r0, lsr #26\r
734 add lr, lr, #8\r
ea8c405f 735\r
cc68a136 736 orr r0, r0, r1, lsl #6\r
737 orr r0, r0, r0, lsl #8\r
738 orr r0, r0, r0, lsl #16\r
739\r
740 mov r1, r0\r
741 mov r2, r0\r
742 mov r3, r0\r
743 mov r4, r0\r
744 mov r5, r0\r
745 mov r6, r0\r
746 mov r7, r0\r
747\r
748 @ go go go!\r
749 stmia lr!, {r0-r7} @ 10*8*4\r
750 stmia lr!, {r0-r7}\r
751 stmia lr!, {r0-r7}\r
752 stmia lr!, {r0-r7}\r
753 stmia lr!, {r0-r7}\r
754 stmia lr!, {r0-r7}\r
755 stmia lr!, {r0-r7}\r
756 stmia lr!, {r0-r7}\r
757 stmia lr!, {r0-r7}\r
758 stmia lr!, {r0-r7}\r
759\r
99bdfd31 760 ldmfd sp!, {r4-r9,lr}\r
761 bx lr\r
cc68a136 762\r
763\r
764@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
765\r
ea38612f 766@ void DrawTilesFromCache(int *hc, int sh, int rlim, struct PicoEState *est)\r
cc68a136 767\r
ea38612f 768.global DrawTilesFromCache\r
cc68a136 769\r
770DrawTilesFromCache:\r
ea38612f 771 stmfd sp!, {r4-r9,r11,lr}\r
cc68a136 772\r
cc68a136 773 @ cache some stuff to avoid mem access\r
88fd63ad 774 ldr r11,[r3, #OFS_EST_HighCol]\r
cc68a136 775 mov r12,#0xf\r
88fd63ad 776 ldr lr, [r3, #OFS_EST_PicoMem_vram]\r
ea38612f 777 mov r9, r3 @ est\r
cc68a136 778\r
740da8c6 779 mvn r5, #0 @ r5=prevcode=-1\r
7a7c6476 780 ands r8, r1, #1\r
781 orr r8, r8, r2, lsl #1\r
740da8c6 782 bne .dtfc_check_rendflags\r
783\r
cc68a136 784 @ scratch: r4, r7\r
785.dtfc_loop:\r
786 ldr r6, [r0], #4 @ read code\r
787 movs r1, r6, lsr #16 @ r1=dx;\r
ea38612f 788 ldmeqfd sp!, {r4-r9,r11,pc} @ dx is never zero, this must be a terminator, return\r
7a7c6476 789 bic r4, r1, #0xfe00\r
790 add r1, r11, r4 @ r1=pdest\r
cc68a136 791\r
e0bcb7a9 792 movs r7, r6, lsl #16\r
793 bpl .dtfc_loop @ !(code & 0x8000)\r
cc68a136 794 cmp r5, r7, lsr #16\r
795 beq .dtfc_samecode @ if (code==prevcode)\r
796\r
797 mov r5, r7, lsr #16\r
798\r
799 mov r2, r5, lsl #21\r
800 mov r2, r2, lsr #17 @ r2=addr=(code&0x7ff)<<4;\r
801 add r2, r2, r6, lsr #25 @ addr+=ty\r
802\r
803 and r3, r5, #0x6000\r
804 mov r3, r3, lsr #9 @ r3=pal=((code&0x6000)>>9);\r
805\r
806 ldr r2, [lr, r2, lsl #1] @ pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
807\r
808.dtfc_samecode:\r
7a7c6476 809 rsbs r4, r4, r8, lsr #1\r
810 bmi .dtfc_cut_tile\r
811\r
812 tst r8, #1\r
cc68a136 813 bne .dtfc_shadow\r
814\r
815 tst r2, r2\r
816 beq .dtfc_loop\r
817\r
818 cmp r2, r2, ror #4\r
819 beq .dtfc_SingleColor @ tileline singlecolor \r
820\r
821 tst r5, #0x0800\r
7a7c6476 822 bne .dtfc_TileFlip\r
cc68a136 823\r
824 @ (r1=pdest, r2=pixels8, r3=pal) r4: scratch, r12: helper pattern\r
cc68a136 825.dtfc_TileNorm:\r
826 TileNorm r12\r
827 b .dtfc_loop\r
828\r
7a7c6476 829.dtfc_TileFlip:\r
830 TileFlip r12\r
831 b .dtfc_loop\r
832\r
cc68a136 833.dtfc_SingleColor:\r
834 and r4, r2, #0xf\r
835 orr r4, r3, r4\r
836 orr r4, r4, r4, lsl #8\r
837 tst r1, #1 @ not aligned?\r
838 strneb r4, [r1], #1\r
839 streqh r4, [r1], #2\r
840 strh r4, [r1], #2\r
841 strh r4, [r1], #2\r
842 strh r4, [r1], #2\r
843 strneb r4, [r1], #1 @ have a remaining unaligned pixel?\r
844 b .dtfc_loop\r
845\r
846.dtfc_shadow:\r
847 tst r2, r2\r
848 beq .dtfc_shadow_blank\r
849\r
850 cmp r2, r2, ror #4\r
851 beq .dtfc_SingleColor @ tileline singlecolor \r
852\r
853 tst r5, #0x0800\r
7a7c6476 854 bne .dtfc_TileFlipShHP\r
cc68a136 855\r
856 @ (r1=pdest, r2=pixels8, r3=pal) r4: scratch, r12: helper pattern\r
cc68a136 857.dtfc_TileNormShHP:\r
858 TileNormShHP\r
859 b .dtfc_loop\r
860\r
7a7c6476 861.dtfc_TileFlipShHP:\r
862 TileFlipShHP\r
863 b .dtfc_loop\r
864\r
cc68a136 865.dtfc_shadow_blank:\r
07abbab1 866 tst r1, #1\r
867 ldrneb r4, [r1]\r
bfa12428 868 mov r6, #0xbf\r
869 and r4, r4, #0xbf\r
07abbab1 870 strneb r4, [r1], #1\r
871 ldrh r4, [r1]\r
872 orr r6, r6, r6, lsl #8\r
873 and r4, r4, r6\r
874 strh r4, [r1], #2\r
875 ldrh r4, [r1]\r
876 and r4, r4, r6\r
877 strh r4, [r1], #2\r
878 ldrh r4, [r1]\r
879 and r4, r4, r6\r
880 strh r4, [r1], #2\r
881 ldrh r4, [r1]\r
882 and r4, r4, r6\r
883 streqh r4, [r1]\r
884 strneb r4, [r1]\r
cc68a136 885 b .dtfc_loop\r
886\r
7a7c6476 887.dtfc_cut_tile:\r
888 add r4, r4, #7 @ 0-6\r
889 mov r4, r4, lsl #2\r
890 mov r12,#0xf<<28\r
891 mov r12,r12,asr r4\r
892 mov r2, r2, ror #16\r
893 tst r5, #0x0800 @ flipped?\r
894 mvnne r12,r12\r
895 and r2, r2, r12\r
896 mov r2, r2, ror #16\r
897 mov r12,#0xf\r
898 tst r8, #1\r
899 bne .dtfc_shadow\r
900 tst r2, r2\r
901 beq .dtfc_loop\r
902 tst r5, #0x0800\r
903 beq .dtfc_TileNorm\r
904 b .dtfc_TileFlip\r
905\r
740da8c6 906@ check if we have detected layer covered with hi-prio tiles:\r
907.dtfc_check_rendflags:\r
88fd63ad 908 ldr r2, [r9, #OFS_EST_rendstatus]\r
283fec1b 909 tst r2, #(PDRAW_PLANE_HI_PRIO|PDRAW_SHHI_DONE)\r
740da8c6 910 beq .dtfc_loop\r
7a7c6476 911 bic r8, r8, #1 @ sh/hi mode off\r
283fec1b 912 tst r2, #PDRAW_SHHI_DONE\r
740da8c6 913 bne .dtfc_loop @ already processed\r
283fec1b 914 orr r2, r2, #PDRAW_SHHI_DONE\r
88fd63ad 915 str r2, [r9, #OFS_EST_rendstatus]\r
740da8c6 916\r
917 add r1, r11,#8\r
07abbab1 918 mov r3, #320/4/4\r
bfa12428 919 mov r6, #0xbf\r
740da8c6 920 orr r6, r6, r6, lsl #8\r
921 orr r6, r6, r6, lsl #16\r
922.dtfc_loop_shprep:\r
07abbab1 923 ldmia r1, {r2,r4,r5,r7}\r
740da8c6 924 subs r3, r3, #1\r
07abbab1 925 and r2, r2, r6\r
926 and r4, r4, r6\r
927 and r5, r5, r6\r
928 and r7, r7, r6\r
929 stmia r1!,{r2,r4,r5,r7}\r
930 bne .dtfc_loop_shprep\r
931\r
932 mvn r5, #0 @ r5=prevcode=-1\r
933 b .dtfc_loop\r
740da8c6 934\r
cc68a136 935.pool\r
936\r
937@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
938\r
939\r
ea38612f 940@ void DrawSpritesSHi(unsigned char *sprited, struct PicoEState *est)\r
941\r
942.global DrawSpritesSHi\r
e352c3af 943\r
944DrawSpritesSHi:\r
fbc65db7 945 ldr r3, [r0]\r
946 mov r12,#0xff\r
e352c3af 947 ands r3, r3, #0x7f\r
948 bxeq lr\r
cc68a136 949\r
ea38612f 950 stmfd sp!, {r1,r4-r11,lr} @ +est\r
fbc65db7 951 strb r12,[r0,#2] @ set end marker\r
952 add r10,r0, #3 @ r10=HighLnSpr end\r
e352c3af 953 add r10,r10,r3 @ r10=HighLnSpr end\r
954\r
88fd63ad 955 ldr r11,[r1, #OFS_EST_HighCol]\r
ea8c405f 956 mov r12,#0xf\r
88fd63ad 957 ldr lr, [r1, #OFS_EST_PicoMem_vram]\r
cc68a136 958\r
cc68a136 959\r
e352c3af 960DrawSpriteSHi:\r
961 @ draw next sprite\r
962 ldrb r0, [r10,#-1]!\r
ea38612f 963 ldr r7, [sp] @ est\r
88fd63ad 964 ldr r1, [r7, #OFS_EST_HighPreSpr]\r
e352c3af 965 cmp r0, #0xff\r
ea38612f 966 ldmeqfd sp!, {r1,r4-r11,pc} @ end of list\r
e352c3af 967 and r0, r0, #0x7f\r
968 add r0, r1, r0, lsl #3\r
969\r
970 ldr r9, [r0, #4] @ sprite[1]\r
971 mov r2, r9, asr #16 @ r2=sx\r
cc68a136 972\r
e352c3af 973 mov r9, r9, lsl #16\r
974 mov r3, r9, lsr #31 @ priority\r
975 mov r9, r9, lsr #16\r
fbc65db7 976@ orr r9, r9, r8, lsl #31 @ r9=code|sh[31] @@ sh is always on here now\r
e352c3af 977 and r4, r9, #0x6000\r
978 orr r9, r9, r4, lsl #16\r
fbc65db7 979 orr r9, r9, #0x90000000 @ r9=scc1 ???? ... <code> (s=shadow/hilight, cc=pal)\r
e352c3af 980 cmp r12,r9, lsr #28 @ sh/hi with pal3?\r
e54507e8 981 cmpne r3, #1 @ if not, is it hi prio?\r
e352c3af 982 bne DrawSpriteSHi @ non-operator low sprite, already drawn\r
cc68a136 983\r
e352c3af 984 ldr r3, [r0] @ sprite[0]\r
e352c3af 985 mov r6, r3, lsr #28\r
986 sub r6, r6, #1 @ r6=width-1 (inc later)\r
987 mov r5, r3, lsr #24\r
988 and r5, r5, #7 @ r5=height\r
cc68a136 989\r
88fd63ad 990 ldr r7, [r7, #OFS_EST_DrawScanline]\r
e352c3af 991 mov r0, r3, lsl #16 @ r4=sy<<16 (tmp)\r
cc68a136 992\r
e352c3af 993 sub r7, r7, r0, asr #16 @ r7=row=DrawScanline-sy\r
cc68a136 994\r
e352c3af 995 tst r9, #0x1000\r
996 movne r0, r5, lsl #3\r
997 subne r0, r0, #1\r
998 subne r7, r0, r7 @ if (code&0x1000) row=(height<<3)-1-row; // Flip Y\r
cc68a136 999\r
e352c3af 1000 add r8, r9, r7, lsr #3 @ tile+=row>>3; // Tile number increases going down\r
1001 tst r9, #0x0800\r
1002 mlane r8, r5, r6, r8 @ if (code&0x0800) { tile+=delta*(width-1);\r
1003 rsbne r5, r5, #0 @ delta=-delta; } // r5=delta now\r
cc68a136 1004\r
e352c3af 1005 mov r8, r8, lsl #21\r
1006 mov r8, r8, lsr #17\r
1007 and r7, r7, #7\r
1008 add r8, r8, r7, lsl #1 @ tile+=(row&7)<<1; // Tile address\r
1009\r
1010 mov r5, r5, lsl #4 @ delta<<=4; // Delta of address\r
e352c3af 1011 mov r3, r4, lsr #9 @ r3=pal=((code>>9)&0x30);\r
1012\r
1013 add r6, r6, #1 @ inc now\r
1014 adds r0, r2, #0 @ mov sx to r0 and set ZV flags\r
1015 b .dsprShi_loop_enter\r
1016\r
1017.dsprShi_loop:\r
1018 subs r6, r6, #1 @ width--\r
1019 beq DrawSpriteSHi\r
1020 adds r0, r0, #8 @ sx+=8\r
1021 add r8, r8, r5 @ tile+=delta\r
1022\r
1023.dsprShi_loop_enter:\r
1024 ble .dsprShi_loop @ sx <= 0\r
cc68a136 1025 cmp r0, #328\r
e352c3af 1026 bge DrawSpriteSHi\r
cc68a136 1027\r
1028 mov r8, r8, lsl #17\r
e352c3af 1029 mov r8, r8, lsr #17 @ tile&=0x7fff; // Clip tile address\r
cc68a136 1030\r
88fd63ad 1031 ldr r2, [lr, r8, lsl #1] @ pack=*(unsigned int *)(PicoMem.vram+addr); // Get 8 pixels\r
e352c3af 1032 add r1, r11, r0 @ r1=pdest\r
cc68a136 1033 tst r2, r2\r
e352c3af 1034 beq .dsprShi_loop\r
cc68a136 1035\r
e352c3af 1036 cmp r12, r9, lsr #28\r
1037 beq .dsprShi_shadow\r
cc68a136 1038\r
1039 cmp r2, r2, ror #4\r
e352c3af 1040 beq .dsprShi_SingleColor @ tileline singlecolor \r
cc68a136 1041\r
e352c3af 1042 tst r9, #0x0800\r
1043 bne .dsprShi_TileFlip\r
cc68a136 1044\r
e352c3af 1045 @ (r1=pdest, r2=pixels8, r3=pal) r4: scratch, r12: helper pattern\r
1046@ scratch: r4, r7\r
1047.dsprShi_TileNorm:\r
cc68a136 1048 TileNorm r12\r
e352c3af 1049 b .dsprShi_loop\r
cc68a136 1050\r
e352c3af 1051.dsprShi_TileFlip:\r
7a7c6476 1052 TileFlip r12\r
e352c3af 1053 b .dsprShi_loop\r
7a7c6476 1054\r
e352c3af 1055.dsprShi_SingleColor:\r
cc68a136 1056 and r4, r2, #0xf\r
1057 orr r4, r3, r4\r
1058 orr r4, r4, r4, lsl #8\r
e352c3af 1059 tst r0, #1 @ not aligned?\r
cc68a136 1060 strneb r4, [r1], #1\r
1061 streqh r4, [r1], #2\r
1062 strh r4, [r1], #2\r
1063 strh r4, [r1], #2\r
1064 strh r4, [r1], #2\r
1065 strneb r4, [r1], #1\r
e352c3af 1066 b .dsprShi_loop\r
cc68a136 1067\r
e352c3af 1068.dsprShi_shadow:\r
1069 tst r9, #0x8000\r
1070 beq .dsprShi_shadow_lowpri\r
07abbab1 1071\r
cc68a136 1072 cmp r2, r2, ror #4\r
e352c3af 1073 beq .dsprShi_singlec_sh\r
cc68a136 1074\r
e352c3af 1075 tst r9, #0x0800\r
1076 bne .dsprShi_TileFlip_sh\r
cc68a136 1077\r
e54507e8 1078 @ (r1=pdest, r2=pixels8, r3=pal) r4, r7: scratch, r12: helper pattern\r
e352c3af 1079.dsprShi_TileNorm_sh:\r
cc68a136 1080 TileNormSh\r
e352c3af 1081 b .dsprShi_loop\r
cc68a136 1082\r
e352c3af 1083.dsprShi_TileFlip_sh:\r
7a7c6476 1084 TileFlipSh\r
e352c3af 1085 b .dsprShi_loop\r
7a7c6476 1086\r
e352c3af 1087.dsprShi_singlec_sh:\r
cc68a136 1088 cmp r2, #0xe0000000\r
e352c3af 1089 bcc .dsprShi_SingleColor @ normal singlecolor tileline (carry inverted in ARM)\r
cc68a136 1090 tst r2, #0x10000000\r
e352c3af 1091 bne .dsprShi_sh_sh\r
cc68a136 1092 TileSingleHi\r
e352c3af 1093 b .dsprShi_loop\r
cc68a136 1094\r
e352c3af 1095.dsprShi_sh_sh:\r
cc68a136 1096 TileSingleSh\r
e352c3af 1097 b .dsprShi_loop\r
cc68a136 1098\r
e352c3af 1099.dsprShi_shadow_lowpri:\r
1100 tst r9, #0x800\r
1101 bne .dsprShi_TileFlip_sh_lp\r
07abbab1 1102\r
e352c3af 1103.dsprShi_TileNorm_sh_lp:\r
07abbab1 1104 TileNormSh_onlyop_lp\r
e352c3af 1105 b .dsprShi_loop\r
07abbab1 1106\r
e352c3af 1107.dsprShi_TileFlip_sh_lp:\r
07abbab1 1108 TileFlipSh_onlyop_lp\r
e352c3af 1109 b .dsprShi_loop\r
07abbab1 1110\r
cc68a136 1111.pool\r
1112\r
1113@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
1114\r
ea38612f 1115@ void DrawAllSprites(unsigned char *sprited, int prio, int sh,\r
1116@ struct PicoEState *est)\r
1117\r
1118.global DrawAllSprites\r
283fec1b 1119\r
1120DrawAllSprites:\r
fbc65db7 1121 orr r1, r2, r1, lsl #1\r
ea38612f 1122 ldr r2, [r0]\r
1123 ands r2, r2, #0x7f\r
283fec1b 1124 bxeq lr\r
1125\r
1126 @ time to do some real work\r
ea38612f 1127 stmfd sp!, {r1,r3-r11,lr} @ +sh|prio<<1 +est\r
283fec1b 1128 mov r12,#0xff\r
fbc65db7 1129 strb r12,[r0,#2] @ set end marker\r
1130 add r10,r0, #3\r
ea38612f 1131 add r10,r10,r2 @ r10=HighLnSpr end\r
283fec1b 1132\r
88fd63ad 1133 ldr r11,[r3, #OFS_EST_HighCol]\r
283fec1b 1134 mov r12,#0xf\r
88fd63ad 1135 ldr lr, [r3, #OFS_EST_PicoMem_vram]\r
283fec1b 1136\r
1137@ + 0 : hhhhvvvv ----hhvv yyyyyyyy yyyyyyyy // v, h: horiz. size\r
cc68a136 1138@ + 4 : xxxxxxxx xxxxxxxx pccvhnnn nnnnnnnn // x: x coord + 8\r
1139\r
ea38612f 1140DrawSprite:\r
283fec1b 1141 @ draw next sprite\r
1142 ldrb r0, [r10,#-1]!\r
ea38612f 1143 ldr r8, [sp] @ sh|prio<<1\r
1144 ldr r7, [sp, #4] @ est\r
e352c3af 1145 mov r2, r0, lsr #7\r
1146 cmp r0, #0xff\r
ea38612f 1147 ldmeqfd sp!, {r1,r3-r11,pc} @ end of list\r
97a7f774 1148 cmp r2, r8, lsr #1\r
e352c3af 1149 bne DrawSprite @ wrong priority\r
88fd63ad 1150 ldr r1, [r7, #OFS_EST_HighPreSpr]\r
283fec1b 1151 and r0, r0, #0x7f\r
1152 add r0, r1, r0, lsl #3\r
cc68a136 1153\r
cc68a136 1154 ldr r3, [r0] @ sprite[0]\r
88fd63ad 1155 ldr r7, [r7, #OFS_EST_DrawScanline]\r
cc68a136 1156 mov r6, r3, lsr #28\r
1157 sub r6, r6, #1 @ r6=width-1 (inc later)\r
1158 mov r5, r3, lsr #24\r
1159 and r5, r5, #7 @ r5=height\r
1160\r
1161 mov r4, r3, lsl #16 @ r4=sy<<16 (tmp)\r
1162\r
cc68a136 1163 ldr r9, [r0, #4]\r
b6d7ac70 1164 sub r7, r7, r4, asr #16 @ r7=row=DrawScanline-sy\r
cc68a136 1165\r
cc68a136 1166 mov r2, r9, asr #16 @ r2=sx\r
e5fa9817 1167 mov r9, r9, lsl #16\r
1168 mov r9, r9, lsr #16\r
97a7f774 1169 orr r9, r9, r8, lsl #31 @ r9=code|sh[31]\r
cc68a136 1170\r
1171 tst r9, #0x1000\r
1172 movne r4, r5, lsl #3\r
1173 subne r4, r4, #1\r
1174 subne r7, r4, r7 @ if (code&0x1000) row=(height<<3)-1-row; // Flip Y\r
1175\r
07abbab1 1176 add r8, r9, r7, lsr #3 @ tile+=row>>3; // Tile number increases going down\r
cc68a136 1177 tst r9, #0x0800\r
1178 mlane r8, r5, r6, r8 @ if (code&0x0800) { tile+=delta*(width-1);\r
1179 rsbne r5, r5, #0 @ delta=-delta; } // r5=delta now\r
1180\r
07abbab1 1181 mov r8, r8, lsl #21\r
1182 mov r8, r8, lsr #17\r
cc68a136 1183 and r7, r7, #7\r
1184 add r8, r8, r7, lsl #1 @ tile+=(row&7)<<1; // Tile address\r
1185\r
e5fa9817 1186.dspr_continue:\r
cc68a136 1187 @ cache some stuff to avoid mem access\r
cc68a136 1188 mov r5, r5, lsl #4 @ delta<<=4; // Delta of address\r
1189 and r4, r9, #0x6000\r
1190 orr r9, r9, r4, lsl #16\r
97a7f774 1191 orrs r9, r9, #0x10000000 @ r9=scc1 ???? ... <code> (s=shadow/hilight, cc=pal)\r
cc68a136 1192\r
cc68a136 1193 mov r3, r4, lsr #9 @ r3=pal=((code>>9)&0x30);\r
97a7f774 1194 orrmi r3, r3, #0x40 @ for sh/hi\r
cc68a136 1195\r
1196 add r6, r6, #1 @ inc now\r
1197 adds r0, r2, #0 @ mov sx to r0 and set ZV flags\r
1198 b .dspr_loop_enter\r
1199\r
1200.dspr_loop:\r
1201 subs r6, r6, #1 @ width--\r
283fec1b 1202 beq DrawSprite\r
cc68a136 1203 adds r0, r0, #8 @ sx+=8\r
1204 add r8, r8, r5 @ tile+=delta\r
1205\r
1206.dspr_loop_enter:\r
1207 ble .dspr_loop @ sx <= 0\r
1208 cmp r0, #328\r
283fec1b 1209 bge DrawSprite\r
cc68a136 1210\r
1211 mov r8, r8, lsl #17\r
1212 mov r8, r8, lsr #17 @ tile&=0x7fff; // Clip tile address\r
1213\r
88fd63ad 1214 ldr r2, [lr, r8, lsl #1] @ pack=*(unsigned int *)(PicoMem.vram+addr); // Get 8 pixels\r
cc68a136 1215 add r1, r11, r0 @ r1=pdest\r
1216 tst r2, r2\r
1217 beq .dspr_loop\r
1218\r
1219 cmp r12, r9, lsr #28\r
1220 beq .dspr_shadow\r
1221\r
1222 cmp r2, r2, ror #4\r
1223 beq .dspr_SingleColor @ tileline singlecolor \r
1224\r
1225 tst r9, #0x0800\r
7a7c6476 1226 bne .dspr_TileFlip\r
cc68a136 1227\r
1228 @ (r1=pdest, r2=pixels8, r3=pal) r4: scratch, r12: helper pattern\r
cc68a136 1229@ scratch: r4, r7\r
1230.dspr_TileNorm:\r
1231 TileNorm r12\r
1232 b .dspr_loop\r
1233\r
7a7c6476 1234.dspr_TileFlip:\r
1235 TileFlip r12\r
1236 b .dspr_loop\r
1237\r
07abbab1 1238.dspr_singlec_sh:\r
1239 cmp r2, #0xe0000000\r
e54507e8 1240 bcs .dspr_TileNorm_sh @ op. tileline, markop. XXX: maybe add a spec. handler?\r
07abbab1 1241\r
cc68a136 1242.dspr_SingleColor:\r
1243 and r4, r2, #0xf\r
1244 orr r4, r3, r4\r
1245 orr r4, r4, r4, lsl #8\r
1246 tst r0, #1 @ not aligned?\r
1247 strneb r4, [r1], #1\r
1248 streqh r4, [r1], #2\r
1249 strh r4, [r1], #2\r
1250 strh r4, [r1], #2\r
1251 strh r4, [r1], #2\r
1252 strneb r4, [r1], #1\r
1253 b .dspr_loop\r
1254\r
1255.dspr_shadow:\r
1256 cmp r2, r2, ror #4\r
1257 beq .dspr_singlec_sh\r
1258\r
1259 tst r9, #0x0800\r
7a7c6476 1260 bne .dspr_TileFlip_sh\r
cc68a136 1261\r
1262 @ (r1=pdest, r2=pixels8, r3=pal) r4: scratch, r12: helper pattern\r
cc68a136 1263.dspr_TileNorm_sh:\r
e54507e8 1264 TileNormSh_markop\r
cc68a136 1265 b .dspr_loop\r
1266\r
7a7c6476 1267.dspr_TileFlip_sh:\r
e54507e8 1268 TileFlipSh_markop\r
cc68a136 1269 b .dspr_loop\r
1270\r
1271\r
cc68a136 1272@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
1273\r
ea38612f 1274@ void DrawWindow(int tstart, int tend, int prio, int sh\r
1275@ struct PicoEState *est)\r
1276\r
1277.global DrawWindow\r
cc68a136 1278\r
1279DrawWindow:\r
ea38612f 1280 ldr r12, [sp] @ est\r
cc68a136 1281 stmfd sp!, {r4-r11,lr}\r
1282\r
88fd63ad 1283 ldr r6, [r12, #OFS_EST_Pico]\r
1284 ldr r10, [r12, #OFS_EST_DrawScanline]\r
ea38612f 1285 mov r11, r12 @ est\r
88fd63ad 1286 ldrb r12, [r6, #OFS_Pico_video_reg+3] @ pvid->reg[3]\r
cc68a136 1287\r
88fd63ad 1288 ldr r4, [r6, #OFS_Pico_video_reg+12]\r
cc68a136 1289 mov r5, r10, lsr #3\r
1290 and r10, r10, #7\r
1291 mov r10, r10, lsl #1 @ r10=ty\r
1292\r
1293 mov r12, r12, lsl #10\r
1294\r
1295 tst r4, #1 @ 40 cell mode?\r
1296 andne r12, r12, #0xf000 @ 0x3c<<10\r
1297 andeq r12, r12, #0xf800\r
1298 addne r12, r12, r5, lsl #7\r
1299 addeq r12, r12, r5, lsl #6 @ nametab\r
1300 add r12, r12, r0, lsl #2 @ +starttile\r
1301\r
88fd63ad 1302 ldr lr, [r11, #OFS_EST_PicoMem_vram]\r
1303 ldr r6, [r11, #OFS_EST_rendstatus]\r
cc68a136 1304\r
1305 @ fetch the first code now\r
1306 ldrh r7, [lr, r12]\r
1307\r
283fec1b 1308 ands r6, r6, #PDRAW_WND_DIFF_PRIO\r
cc68a136 1309 orr r6, r6, r2\r
cc68a136 1310\r
7292c709 1311 eoreq r8, r2, r7, lsr #15 @ do prio bits differ?\r
1312 cmpeq r8, #1\r
1313 ldmeqfd sp!, {r4-r11,pc} @ yes, assume that whole window uses same priority\r
cc68a136 1314\r
cc68a136 1315 orr r6, r6, r3, lsl #8 @ shadow mode\r
1316\r
1317 sub r8, r1, r0\r
cc68a136 1318\r
1319 @ cache some stuff to avoid mem access\r
88fd63ad 1320 ldr r11, [r11, #OFS_EST_HighCol]\r
ea8c405f 1321 mov r8, r8, lsl #1 @ cells\r
ea8c405f 1322 add r11,r11,#8\r
ea8c405f 1323 mvn r9, #0 @ r9=prevcode=-1\r
07abbab1 1324 add r1, r11, r0, lsl #4 @ r1=pdest\r
cc68a136 1325 mov r0, #0xf\r
1326 b .dwloop_enter\r
1327\r
07abbab1 1328 @ r4,r5 are scratch in this loop\r
cc68a136 1329.dwloop:\r
1330 add r1, r1, #8\r
1331.dwloop_nor1:\r
1332 add r12, r12, #2 @ halfwords\r
1333 ldrh r7, [lr, r12] @ r7=code (int, but from unsigned, no sign extend)\r
1334 subs r8, r8, #1\r
1335 beq .dwloop_end @ done\r
1336\r
1337 eor r5, r6, r7, lsr #15\r
1338 tst r5, #1\r
1339 orrne r6, r6, #2 @ wrong pri\r
1340 bne .dwloop\r
1341\r
1342 cmp r7, r9\r
1343 beq .dw_samecode @ we know stuff about this tile already\r
1344\r
1345.dwloop_enter:\r
1346 mov r9, r7 @ remember code\r
1347\r
1348 movs r2, r9, lsl #20 @ if (code&0x1000)\r
1349 mov r2, r2, lsl #1\r
1350 add r2, r10, r2, lsr #17 @ r2=addr=(code&0x7ff)<<4; addr+=ty\r
1351 eorcs r2, r2, #0x0e @ if (code&0x1000) addr^=0xe;\r
1352\r
1353 and r3, r9, #0x6000\r
1354 mov r3, r3, lsr #9 @ r3=pal=((code&0x6000)>>9);\r
1355\r
1356 ldr r2, [lr, r2, lsl #1] @ pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels\r
1357\r
1358.dw_samecode:\r
1359 tst r6, #0x100\r
1360 bne .dw_shadow\r
1361.dw_shadow_done:\r
1362 tst r2, r2\r
1363 beq .dwloop @ tileline blank\r
1364\r
1365 cmp r2, r2, ror #4\r
1366 beq .dw_SingleColor @ tileline singlecolor \r
1367\r
1368 tst r9, #0x0800\r
7a7c6476 1369 bne .dw_TileFlip\r
cc68a136 1370\r
1371 @ (r1=pdest, r2=pixels8, r3=pal) r4: scratch, r0: helper pattern\r
cc68a136 1372.dw_TileNorm:\r
1373 TileNorm r0\r
1374 b .dwloop\r
1375\r
7a7c6476 1376.dw_TileFlip:\r
1377 TileFlip r0\r
1378 b .dwloop\r
1379\r
cc68a136 1380.dw_SingleColor:\r
1381 and r4, r0, r2 @ #0x0000000f\r
1382 orr r4, r3, r4\r
1383 orr r4, r4, r4, lsl #8\r
1384 orr r4, r4, r4, lsl #16\r
1385 mov r5, r4\r
1386 stmia r1!, {r4,r5}\r
1387 b .dwloop_nor1 @ we incremeted r1 ourselves\r
1388\r
1389.dw_shadow:\r
1390 tst r6, #1 @ hi pri?\r
1391 orreq r3, r3, #0x40\r
1392 beq .dw_shadow_done\r
1393 ldr r4, [r1]\r
07abbab1 1394 mov r5, #0x3f\r
1395 orr r5, r5, r5, lsl #8\r
1396 orr r5, r5, r5, lsl #16\r
1397 and r4, r4, r5\r
cc68a136 1398 str r4, [r1]\r
1399 ldr r4, [r1,#4]\r
07abbab1 1400 and r4, r4, r5\r
cc68a136 1401 str r4, [r1,#4]\r
1402 b .dw_shadow_done\r
1403\r
1404.dwloop_end:\r
ea38612f 1405 and r2, r6, #PDRAW_WND_DIFF_PRIO\r
1406 ldmfd sp!, {r4-r11,lr}\r
1407 ldr r0, [sp]\r
88fd63ad 1408 ldr r1, [r0, #OFS_EST_rendstatus]\r
ea38612f 1409 orr r1, r1, r2\r
88fd63ad 1410 str r1, [r0, #OFS_EST_rendstatus]\r
cc68a136 1411\r
ea38612f 1412 bx lr\r
cc68a136 1413\r
1414\r
1415@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
1416\r
1417\r
1418@ hilights 2 pixels in RGB444/BGR444 format\r
1419.macro TileDoShHi2Pixels444 reg\r
1420 mov \reg, \reg, ror #12\r
1421 adds \reg, \reg, #0x40000000\r
1422 orrcs \reg, \reg, #0xf0000000\r
1423 mov \reg, \reg, ror #28\r
1424 adds \reg, \reg, #0x40000000\r
1425 orrcs \reg, \reg, #0xf0000000\r
1426 mov \reg, \reg, ror #28\r
1427 adds \reg, \reg, #0x40000000\r
1428 orrcs \reg, \reg, #0xf0000000\r
1429 mov \reg, \reg, ror #24\r
1430 adds \reg, \reg, #0x40000000\r
1431 orrcs \reg, \reg, #0xf0000000\r
1432 mov \reg, \reg, ror #28\r
1433 adds \reg, \reg, #0x40000000\r
1434 orrcs \reg, \reg, #0xf0000000\r
1435 mov \reg, \reg, ror #28\r
1436 adds \reg, \reg, #0x40000000\r
1437 orrcs \reg, \reg, #0xf0000000\r
1438 mov \reg, \reg, ror #12\r
1439.endm\r
1440\r
1441\r
cc68a136 1442@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
1443\r
1444\r
cc68a136 1445@ Convert 0000bbb0 ggg0rrr0\r
1446@ to rrrrrggg gggbbbbb\r
1447\r
a39d8ba5 1448@ r2,r3 - scratch, lr = 0x001c001c, r8 = 0x08610861\r
cc68a136 1449.macro convRGB565 reg\r
a39d8ba5 1450 and r2, lr, \reg,lsr #7 @ b\r
1451 and r3, lr, \reg,lsr #3 @ g\r
1452 and \reg, lr, \reg,lsl #1 @ r\r
1453 orr r2, r2, r3, lsl #6\r
1454 orr \reg, r2, \reg,lsl #11\r
1455\r
1456 and r2, r8, \reg,lsr #4\r
1457 orr \reg, \reg, r2\r
cc68a136 1458.endm\r
1459\r
a39d8ba5 1460@ trashes: r2-r8,r12,lr; r8 = 0x08610861; r0,r1 are advanced\r
b2305d08 1461.macro vidConvCpyRGB565_local\r
2ec14aec 1462 mov r12, r2, lsr #3 @ repeats\r
cc68a136 1463 mov lr, #0x001c0000\r
1464 orr lr, lr, #0x01c @ lr == pattern 0x001c001c\r
cc68a136 1465\r
b2305d08 14660:\r
cc68a136 1467 ldmia r1!, {r4-r7}\r
1468 subs r12, r12, #1\r
1469 convRGB565 r4\r
1470 str r4, [r0], #4\r
1471 convRGB565 r5\r
1472 str r5, [r0], #4\r
1473 convRGB565 r6\r
1474 str r6, [r0], #4\r
1475 convRGB565 r7\r
1476 str r7, [r0], #4\r
1477\r
b2305d08 1478 bgt 0b\r
1479.endm\r
1480\r
1481\r
1482.global vidConvCpyRGB565\r
cc68a136 1483\r
b2305d08 1484vidConvCpyRGB565: @ void *to, void *from, int pixels\r
1485 stmfd sp!, {r4-r9,lr}\r
a39d8ba5 1486 mov r8, #0x0061\r
1487 orr r8, r8, #0x0800\r
f4750ee0 1488 orr r8, r8, r8, lsl #16\r
b2305d08 1489 vidConvCpyRGB565_local\r
cc68a136 1490 ldmfd sp!, {r4-r9,lr}\r
1491 bx lr\r
1492\r
1493\r
ea38612f 1494@ void PicoDoHighPal555(int sh, int line, struct PicoEState *est)\r
1495\r
1496.global PicoDoHighPal555\r
cc68a136 1497\r
b2305d08 1498PicoDoHighPal555:\r
ea38612f 1499 stmfd sp!, {r4-r10,lr}\r
1500 mov r10,r2 @ est\r
b2305d08 1501 mov r1, #0\r
88fd63ad 1502 ldr r8, [r10, #OFS_EST_Pico]\r
cc68a136 1503\r
b2305d08 1504PicoDoHighPal555_nopush:\r
a39d8ba5 1505 orr r9, r1, r0, lsl #31 @ 0:called from FinalizeLine555, 31: s/h\r
b2305d08 1506\r
88fd63ad 1507 add r0, r10, #OFS_EST_HighPal\r
b2305d08 1508\r
cc68a136 1509 mov r1, #0\r
88fd63ad 1510 strb r1, [r8, #OFS_Pico_m_dirtyPal]\r
b2305d08 1511\r
88fd63ad 1512 ldr r1, [r10, #OFS_EST_PicoMem_cram]\r
cc68a136 1513 mov r2, #0x40\r
a39d8ba5 1514 mov r8, #0x0061\r
1515 orr r8, r8, #0x0800\r
f4750ee0 1516 orr r8, r8, r8, lsl #16\r
a39d8ba5 1517\r
b2305d08 1518 vidConvCpyRGB565_local\r
cc68a136 1519\r
a39d8ba5 1520 tst r9, #(1<<31)\r
b2305d08 1521 beq PicoDoHighPal555_end\r
1522\r
88fd63ad 1523 add r3, r10, #OFS_EST_HighPal\r
cc68a136 1524\r
1525 @ shadowed pixels:\r
1526 mov r12, #0x008e\r
cc68a136 1527 add r4, r3, #0x40*2\r
b2305d08 1528 orr r12,r12,#0x7300\r
cc68a136 1529 add r5, r3, #0xc0*2\r
b2305d08 1530 orr r12,r12,r12,lsl #16\r
cc68a136 1531 mov lr, #0x40/4\r
1532.fl_loopcpRGB555_sh:\r
1533 ldmia r3!, {r1,r6}\r
1534 subs lr, lr, #1\r
1535 and r1, r12, r1, lsr #1\r
1536 and r6, r12, r6, lsr #1\r
1537 stmia r4!, {r1,r6}\r
1538 stmia r5!, {r1,r6}\r
1539 bne .fl_loopcpRGB555_sh\r
1540\r
1541 @ hilighted pixels:\r
a39d8ba5 1542 @ t = ((dpal[i] >> 1) & 0x738e738e) + 0x738e738e;\r
1543 @ t |= (t >> 4) & 0x08610861;\r
1544 @ r8=0x08610861\r
cc68a136 1545 sub r3, r3, #0x40*2\r
a39d8ba5 1546 mov lr, #0x40/4\r
cc68a136 1547.fl_loopcpRGB555_hi:\r
a39d8ba5 1548 ldmia r3!, {r1,r6}\r
1549 and r1, r12, r1, lsr #1\r
1550 and r6, r12, r6, lsr #1\r
1551 add r1, r12, r1\r
1552 add r6, r12, r6\r
1553 and r5, r8, r1, lsr #4\r
1554 and r7, r8, r6, lsr #4\r
1555 orr r1, r1, r5\r
1556 orr r6, r6, r7\r
1557 stmia r4!, {r1,r6}\r
cc68a136 1558 subs lr, lr, #1\r
1559 bne .fl_loopcpRGB555_hi\r
b2305d08 1560 mov r0, #1\r
cc68a136 1561\r
b2305d08 1562PicoDoHighPal555_end:\r
a39d8ba5 1563 tst r9, #1\r
ea38612f 1564 ldmeqfd sp!, {r4-r10,pc}\r
b2305d08 1565\r
88fd63ad 1566 ldr r8, [r10, #OFS_EST_Pico]\r
b2305d08 1567 b FinalizeLineRGB555_pal_done\r
1568\r
1569\r
ea38612f 1570@ void FinalizeLine555(int sh, int line, struct PicoEState *est)\r
1571\r
1572.global FinalizeLine555\r
b2305d08 1573\r
5a681086 1574FinalizeLine555:\r
ea38612f 1575 stmfd sp!, {r4-r10,lr}\r
1576 mov r10,r2 @ est\r
88fd63ad 1577 ldr r8, [r10, #OFS_EST_Pico]\r
b2305d08 1578\r
88fd63ad 1579 ldrb r2, [r8, #OFS_Pico_m_dirtyPal]\r
b2305d08 1580 mov r1, #1\r
1581 tst r2, r2\r
1582 bne PicoDoHighPal555_nopush\r
1583\r
1584FinalizeLineRGB555_pal_done:\r
88fd63ad 1585 add r3, r10, #OFS_EST_HighPal\r
cc68a136 1586\r
88fd63ad 1587 ldr r12, [r10, #OFS_EST_rendstatus]\r
b2305d08 1588 eors r0, r0, #1 @ sh is 0\r
e5fa9817 1589 mov lr, #0xff\r
283fec1b 1590 tstne r12,#PDRAW_ACC_SPRITES\r
e5fa9817 1591 movne lr, #0x3f\r
1592\r
88fd63ad 1593 ldr r1, [r10, #OFS_EST_HighCol]\r
1594 ldr r0, [r10, #OFS_EST_DrawLineDest]\r
ea8c405f 1595 add r1, r1, #8\r
3d48f143 1596\r
88fd63ad 1597 ldrb r12, [r8, #OFS_Pico_video_reg+12]\r
cc68a136 1598 mov lr, lr, lsl #1\r
1599\r
3d48f143 1600 tst r12, #1\r
1601 movne r2, #320/8 @ len\r
1602 bne .fl_no32colRGB555\r
88fd63ad 1603 ldr r4, [r10, #OFS_EST_PicoOpt]\r
3d48f143 1604 mov r2, #256/8\r
1605 ldr r4, [r4]\r
1606 tst r4, #0x4000\r
1607 bne .fl_32scale_RGB555\r
1608 tst r4, #0x0100\r
1609 addeq r0, r0, #32*2\r
1610\r
1611.fl_no32colRGB555:\r
cc68a136 1612\r
f62850ba 1613#ifdef UNALIGNED_DRAWLINEDEST\r
499a0be3 1614 @ this is basically for Gizmondo, which has unaligned odd lines in the framebuffer\r
1615 tst r0, #2\r
1616 bne .fl_RGB555u\r
f62850ba 1617#endif\r
499a0be3 1618\r
1619.fl_loopRGB555:\r
cc68a136 1620 ldr r12, [r1], #4\r
1621 ldr r7, [r1], #4\r
1622\r
1623 and r4, lr, r12, lsl #1\r
1624 ldrh r4, [r3, r4]\r
1625 and r5, lr, r12, lsr #7\r
1626 ldrh r5, [r3, r5]\r
1627 and r6, lr, r12, lsr #15\r
1628 ldrh r6, [r3, r6]\r
1629 orr r4, r4, r5, lsl #16\r
1630\r
1631 and r5, lr, r12, lsr #23\r
1632 ldrh r5, [r3, r5]\r
1633 and r8, lr, r7, lsl #1\r
1634 ldrh r8, [r3, r8]\r
1635 orr r5, r6, r5, lsl #16\r
1636\r
1637 and r6, lr, r7, lsr #7\r
1638 ldrh r6, [r3, r6]\r
1639 and r12,lr, r7, lsr #15\r
1640 ldrh r12,[r3, r12]\r
499a0be3 1641 and r7, lr, r7, lsr #23\r
1642 ldrh r7, [r3, r7]\r
cc68a136 1643 orr r8, r8, r6, lsl #16\r
1644\r
cc68a136 1645 subs r2, r2, #1\r
499a0be3 1646 orr r12,r12, r7, lsl #16\r
cc68a136 1647\r
1648 stmia r0!, {r4,r5,r8,r12}\r
1649 bne .fl_loopRGB555\r
1650\r
ea38612f 1651 ldmfd sp!, {r4-r10,lr}\r
3d48f143 1652 bx lr\r
1653\r
1654\r
1655.fl_32scale_RGB555:\r
3d48f143 1656 mov r9, #0x3900 @ f800 07e0 001f | e000 0780 001c | 3800 01e0 0007\r
1657 orr r9, r9, #0x00e7\r
1658\r
f62850ba 1659#ifdef UNALIGNED_DRAWLINEDEST\r
499a0be3 1660 tst r0, #2\r
1661 bne .fl_32scale_RGB555u\r
f62850ba 1662#endif\r
499a0be3 1663\r
3d48f143 1664.fl_loop32scale_RGB555:\r
1665 ldr r12, [r1], #4\r
1666 ldr r7, [r1], #4\r
cc68a136 1667\r
3d48f143 1668 and r4, lr, r12,lsl #1\r
1669 ldrh r4, [r3, r4]\r
1670 and r5, lr, r12,lsr #7\r
1671 ldrh r5, [r3, r5]\r
1672 and r4, r4, r9, lsl #2\r
1673 orr r4, r4, r4, lsl #14 @ r4[31:16] = 1/4 pix_s 0\r
1674 and r5, r5, r9, lsl #2\r
1675 sub r6, r5, r5, lsr #2 @ r6 = 3/4 pix_s 1\r
1676 add r4, r4, r6, lsl #16 @ pix_d 0, 1\r
1677 and r6, lr, r12,lsr #15\r
1678 ldrh r6, [r3, r6]\r
1679 and r12,lr, r12,lsr #23\r
1680 ldrh r12,[r3, r12]\r
1681 and r6, r6, r9, lsl #2\r
1682 add r5, r5, r6\r
1683 mov r5, r5, lsr #1\r
1684 sub r6, r6, r6, lsr #2 @ r6 = 3/4 pix_s 2\r
1685 orr r5, r5, r6, lsl #16\r
1686\r
1687 and r6, lr, r7, lsl #1\r
1688 ldrh r6, [r3, r6]\r
1689 and r12,r12,r9, lsl #2\r
1690 add r5, r5, r12,lsl #14 @ pix_d 2, 3\r
1691 and r6, r6, r9, lsl #2\r
1692 orr r6, r12,r6, lsl #16 @ pix_d 4, 5\r
1693\r
1694 and r12,lr, r7, lsr #7\r
1695 ldrh r12,[r3, r12]\r
1696 and r10,lr, r7, lsr #15\r
1697 ldrh r10,[r3, r10]\r
1698 and r12,r12,r9, lsl #2\r
1699 sub r8, r12,r12,lsr #2 @ r8 = 3/4 pix_s 1\r
1700 add r8, r8, r6, lsr #18\r
1701 and r7, lr, r7, lsr #23\r
1702 ldrh r7, [r3, r7]\r
1703 and r10,r10,r9, lsl #2\r
1704 orr r8, r8, r10,lsl #15\r
1705 add r8, r8, r12,lsl #15 @ pix_d 6, 7\r
1706 sub r10,r10,r10,lsr #2 @ r10= 3/4 pix_s 2\r
1707 and r7, r7, r9, lsl #2\r
1708 add r10,r10,r7, lsr #2 @ += 1/4 pix_s 3\r
1709 orr r10,r10,r7, lsl #16 @ pix_d 8, 9\r
1710\r
1711 subs r2, r2, #1\r
1712\r
1713 stmia r0!, {r4,r5,r6,r8,r10}\r
1714 bne .fl_loop32scale_RGB555\r
1715\r
ea38612f 1716 ldmfd sp!, {r4-r10,lr}\r
3d48f143 1717 bx lr\r
1718\r
f62850ba 1719#ifdef UNALIGNED_DRAWLINEDEST\r
499a0be3 1720 @ unaligned versions of loops\r
9839d126 1721 @ warning: starts drawing 2bytes before dst\r
499a0be3 1722\r
1723.fl_RGB555u:\r
9839d126 1724 sub r0, r0, #2 @ initial adjustment\r
1725 mov r8, #0\r
499a0be3 1726\r
1727.fl_loopRGB555u:\r
1728 ldr r12, [r1], #4\r
1729 ldr r7, [r1], #4\r
1730\r
9839d126 1731 and r6, lr, r12,lsl #1\r
1732 ldrh r6, [r3, r6]\r
1733 and r5, lr, r12,lsr #7\r
499a0be3 1734 ldrh r5, [r3, r5]\r
9839d126 1735 orr r4, r8, r6, lsl #16\r
499a0be3 1736\r
9839d126 1737 and r6, lr, r12,lsr #15\r
499a0be3 1738 ldrh r6, [r3, r6]\r
9839d126 1739 and r8, lr, r12,lsr #23\r
499a0be3 1740 ldrh r8, [r3, r8]\r
9839d126 1741 orr r5, r5, r6, lsl #16\r
499a0be3 1742\r
9839d126 1743 and r6, lr, r7, lsl #1\r
499a0be3 1744 ldrh r6, [r3, r6]\r
9839d126 1745 and r12,lr, r7, lsr #7\r
499a0be3 1746 ldrh r12,[r3, r12]\r
9839d126 1747 orr r6, r8, r6, lsl #16\r
1748\r
1749 and r8, lr, r7, lsr #15\r
499a0be3 1750 ldrh r8, [r3, r8]\r
9839d126 1751 and r7, lr, r7, lsr #23\r
499a0be3 1752\r
1753 subs r2, r2, #1\r
9839d126 1754 orr r12,r12,r8, lsl #16\r
1755 ldrh r8, [r3, r7]\r
1756\r
1757 stmia r0!, {r4,r5,r6,r12}\r
499a0be3 1758 bne .fl_loopRGB555u\r
1759\r
1760 strh r8, [r0], #2\r
1761\r
ea38612f 1762 ldmfd sp!, {r4-r10,lr}\r
499a0be3 1763 bx lr\r
1764\r
1765\r
1766.fl_32scale_RGB555u:\r
9839d126 1767 sub r0, r0, #2 @ initial adjustment\r
1768 mov r4, #0\r
499a0be3 1769\r
1770 @ r9 f800 07e0 001f | e000 0780 001c | 3800 01e0 0007\r
1771.fl_loop32scale_RGB555u:\r
1772 ldr r12, [r1], #4\r
1773 ldr r7, [r1], #4\r
1774\r
9839d126 1775 and r6, lr, r12,lsl #1\r
1776 ldrh r6, [r3, r6]\r
499a0be3 1777 and r5, lr, r12,lsr #7\r
1778 ldrh r5, [r3, r5]\r
9839d126 1779 and r6, r6, r9, lsl #2\r
1780 orr r4, r4, r6, lsl #16 @ r4 = pix_d -1, 0\r
499a0be3 1781\r
1782 and r5, r5, r9, lsl #2\r
9839d126 1783 sub r8, r5, r5, lsr #2 @ r8 = 3/4 pix_s 1\r
1784 add r6, r8, r6, lsr #2 @ r6 = (1/4 pix_s 0) + (3/4 pix_s 1)\r
1785 orr r5, r6, r5, lsl #15\r
499a0be3 1786\r
1787 and r6, lr, r12,lsr #15\r
1788 ldrh r6, [r3, r6]\r
1789 and r12,lr, r12,lsr #23\r
1790 ldrh r12,[r3, r12]\r
1791 and r6, r6, r9, lsl #2\r
9839d126 1792 add r5, r5, r6, lsl #15 @ r5 = pix_d 1, 2\r
499a0be3 1793\r
9839d126 1794 and r8, lr, r7, lsl #1\r
1795 ldrh r8, [r3, r8]\r
1796 and r10,lr, r7, lsr #7\r
1797 ldrh r10,[r3, r10]\r
499a0be3 1798 and r12,r12,r9, lsl #2\r
9839d126 1799 sub r6, r6, r6, lsr #2 @ r6 = 3/4 pix_s 2\r
1800 add r6, r6, r12,lsr #2\r
1801 orr r6, r6, r12,lsl #16 @ r6 = pix_d 3, 4\r
499a0be3 1802\r
9839d126 1803 and r8, r8, r9, lsl #2\r
1804 and r10,r10,r9, lsl #2\r
1805 sub r12,r10,r10,lsr #2 @ r12 = 3/4 pix_s 5\r
1806 orr r8, r8, r8, lsl #14\r
1807 add r8, r8, r12,lsl #16 @ r8 = pix_d 5, 6\r
1808 and r12,lr, r7, lsr #15\r
499a0be3 1809 ldrh r12,[r3, r12]\r
499a0be3 1810 and r7, lr, r7, lsr #23\r
1811 ldrh r7, [r3, r7]\r
9839d126 1812 and r12,r12,r9, lsl #2\r
1813 add r10,r10,r12\r
1814 mov r10,r10, lsr #1\r
1815 sub r12,r12,r12,lsr #2 @ r12 = 3/4 pix_s 6\r
1816 orr r10,r10,r12,lsl #16\r
499a0be3 1817 and r7, r7, r9, lsl #2\r
9839d126 1818 add r10,r10,r7, lsl #14 @ r10 = pix_d 7, 8\r
499a0be3 1819\r
1820 subs r2, r2, #1\r
1821\r
1822 stmia r0!, {r4,r5,r6,r8,r10}\r
9839d126 1823 mov r4, r7\r
499a0be3 1824 bne .fl_loop32scale_RGB555u\r
1825\r
9839d126 1826 strh r4, [r0], #2\r
1827\r
ea38612f 1828 ldmfd sp!, {r4-r10,lr}\r
499a0be3 1829 bx lr\r
1830\r
f62850ba 1831#endif /* UNALIGNED_DRAWLINEDEST */\r
499a0be3 1832\r
cc68a136 1833\r
1834@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\r
1835\r
1836@ utility\r
1837.global blockcpy @ void *dst, void *src, size_t n\r
1838\r
1839blockcpy:\r
1840 stmfd sp!, {r4,r5}\r
1841 mov r2, r2, lsr #4\r
1842blockcpy_loop:\r
1843 ldmia r1!, {r3-r5,r12}\r
1844 subs r2, r2, #1\r
1845 stmia r0!, {r3-r5,r12}\r
1846 bne blockcpy_loop\r
1847 ldmfd sp!, {r4,r5}\r
1848 bx lr\r
1849\r
1850\r
1851.global blockcpy_or @ void *dst, void *src, size_t n, int pat\r
1852\r
1853blockcpy_or:\r
1854 stmfd sp!, {r4-r6}\r
1855 orr r3, r3, r3, lsl #8\r
1856 orr r3, r3, r3, lsl #16\r
1857 mov r2, r2, lsr #4\r
1858blockcpy_loop_or:\r
1859 ldmia r1!, {r4-r6,r12}\r
1860 subs r2, r2, #1\r
1861 orr r4, r4, r3\r
1862 orr r5, r5, r3\r
1863 orr r6, r6, r3\r
1864 orr r12,r12,r3\r
1865 stmia r0!, {r4-r6,r12}\r
1866 bne blockcpy_loop_or\r
1867 ldmfd sp!, {r4-r6}\r
1868 bx lr\r
1869\r
cff531af 1870@ vim:filetype=armasm\r
fast MegaDrive/MegaCD/32X emulator