Mercurial > repos > blastem

comparison runtime.S @ 104:a0fdaa134964

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Use unsigned comparisons for address decoding, exit when we hit an unhandled addressing mode for jmp
author Mike Pavone <pavone@retrodev.com>
date Thu, 27 Dec 2012 23:00:11 -0800
parents dd3c680c618c
children 0a0743a30ca1
comparison
equal deleted inserted replaced
103:a71544cd01ea 104:a0fdaa134964
176 .global try_fifo_write 176 .global try_fifo_write
177 m68k_write_word: 177 m68k_write_word:
178 call inccycles 178 call inccycles
179 and $0xFFFFFF, %rdi 179 and $0xFFFFFF, %rdi
180 cmp $0x400000, %edi 180 cmp $0x400000, %edi
181 jle cart_w 181 jbe cart_w
182 cmp $0xE00000, %edi 182 cmp $0xE00000, %edi
183 jge workram_w 183 jae workram_w
184 cmp $0xC00000, %edi 184 cmp $0xC00000, %edi
185 jge vdp_psg_w 185 jae vdp_psg_w
186 cmp $0xA10000, %edi 186 cmp $0xA10000, %edi
187 jl not_io_w 187 jb not_io_w
188 cmp $0xA12000, %edi 188 cmp $0xA12000, %edi
189 jge not_io_w 189 jae not_io_w
190 jmp do_io_write_w 190 jmp do_io_write_w
191 not_io_w: 191 not_io_w:
192 ret 192 ret
193 workram_w: 193 workram_w:
194 and $0xFFFF, %rdi 194 and $0xFFFF, %rdi
200 vdp_psg_w: 200 vdp_psg_w:
201 test $0x2700E0, %edi 201 test $0x2700E0, %edi
202 jnz crash 202 jnz crash
203 and $0x1F, %edi 203 and $0x1F, %edi
204 cmp $4, %edi 204 cmp $4, %edi
205 jl try_fifo_write 205 jb try_fifo_write
206 jmp do_vdp_port_write 206 jmp do_vdp_port_write
207 try_fifo_write: 207 try_fifo_write:
208 push %rdx 208 push %rdx
209 push %rbx 209 push %rbx
210 /* fetch VDP context pointer from 68K context */ 210 /* fetch VDP context pointer from 68K context */
243 .global m68k_write_byte 243 .global m68k_write_byte
244 m68k_write_byte: 244 m68k_write_byte:
245 call inccycles 245 call inccycles
246 and $0xFFFFFF, %rdi 246 and $0xFFFFFF, %rdi
247 cmp $0x400000, %edi 247 cmp $0x400000, %edi
248 jle cart_wb 248 jbe cart_wb
249 cmp $0xE00000, %edi 249 cmp $0xE00000, %edi
250 jge workram_wb 250 jae workram_wb
251 cmp $0xC00000, %edi 251 cmp $0xC00000, %edi
252 jge vdp_psg_wb 252 jae vdp_psg_wb
253 cmp $0xA10000, %edi 253 cmp $0xA10000, %edi
254 jl not_io_wb 254 jb not_io_wb
255 cmp $0xA12000, %edi 255 cmp $0xA12000, %edi
256 jge not_io_wb 256 jae not_io_wb
257 jmp do_io_write 257 jmp do_io_write
258 not_io_wb: 258 not_io_wb:
259 ret 259 ret
260 workram_wb: 260 workram_wb:
261 /* deal with byte swapping */ 261 /* deal with byte swapping */
316 .global m68k_read_word_scratch1 316 .global m68k_read_word_scratch1
317 m68k_read_word_scratch1: 317 m68k_read_word_scratch1:
318 call inccycles 318 call inccycles
319 and $0xFFFFFF, %rcx 319 and $0xFFFFFF, %rcx
320 cmp $0x400000, %ecx 320 cmp $0x400000, %ecx
321 jle cart 321 jbe cart
322 cmp $0xE00000, %ecx 322 cmp $0xE00000, %ecx
323 jge workram 323 jae workram
324 cmp $0xC00000, %ecx 324 cmp $0xC00000, %ecx
325 jge vdp_psg 325 jae vdp_psg
326 cmp $0xA10000, %ecx 326 cmp $0xA10000, %ecx
327 jl not_io 327 jb not_io
328 cmp $0xA12000, %ecx 328 cmp $0xA12000, %ecx
329 jge not_io 329 jae not_io
330 call do_io_read_w 330 call do_io_read_w
331 ret 331 ret
332 not_io: 332 not_io:
333 xor %cx, %cx 333 xor %cx, %cx
334 dec %cx 334 dec %cx
364 .global m68k_read_byte_scratch1 364 .global m68k_read_byte_scratch1
365 m68k_read_byte_scratch1: 365 m68k_read_byte_scratch1:
366 call inccycles 366 call inccycles
367 and $0xFFFFFF, %rcx 367 and $0xFFFFFF, %rcx
368 cmp $0x400000, %ecx 368 cmp $0x400000, %ecx
369 jle cart_b 369 jbe cart_b
370 cmp $0xE00000, %ecx 370 cmp $0xE00000, %ecx
371 jge workram_b 371 jae workram_b
372 cmp $0xA10000, %ecx 372 cmp $0xA10000, %ecx
373 jl not_io_b 373 jb not_io_b
374 cmp $0xA12000, %ecx 374 cmp $0xA12000, %ecx
375 jge not_io_b 375 jae not_io_b
376 jmp do_io_read 376 jmp do_io_read
377 not_io_b: 377 not_io_b:
378 xor %cl, %cl 378 xor %cl, %cl
379 dec %cl 379 dec %cl
380 ret 380 ret