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comparison zruntime.S @ 451:b7c3b2d22858

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Added support for saving savestates. Added gst savestate format test harness
author Mike Pavone <pavone@retrodev.com>
date Fri, 26 Jul 2013 19:55:04 -0700
parents 30c250a41629
children cc6030bd04c6
comparison
equal deleted inserted replaced
448:e85a107e6ec0 451:b7c3b2d22858
17 ret 17 ret
18 do_limit: 18 do_limit:
19 cmp 112(%rsi), %ebp 19 cmp 112(%rsi), %ebp
20 jb no_sync 20 jb no_sync
21 sync_io: 21 sync_io:
22 movw $0, 164(%rsi)
22 call z80_save_context_scratch 23 call z80_save_context_scratch
23 pop %rax /*return address in read/write func*/ 24 pop %rax /*return address in read/write func*/
24 pop 104(%rsi) /*return address in native code*/ 25 pop 104(%rsi) /*return address in native code*/
25 sub $5, %rax /* adjust return addres to point to the call instruction that got us here */ 26 sub $5, %rax /* adjust return addres to point to the call instruction that got us here */
26 mov %rax, (%rsi) 27 mov %rax, (%rsi)
27 28
28 pop %r15 /* restore callee saved regsiters */ 29 pop %r15 /* restore callee saved regsiters */
29 pop %r14 30 pop %r14
30 pop %r13 31 pop %r13
31 pop %r12 32 pop %r12
32 pop %rbp 33 pop %rbp
33 pop %rbx 34 pop %rbx
34 ret /* return to caller of z80_run */ 35 ret /* return to caller of z80_run */
35 36
36 .global z80_handle_cycle_limit_int 37 .global z80_handle_cycle_limit_int
37 z80_handle_cycle_limit_int: 38 z80_handle_cycle_limit_int:
38 cmp 116(%rsi), %ebp 39 cmp 116(%rsi), %ebp
39 jb zskip_int 40 jb zskip_int
40 mov 112(%rsi), %ebp /* set cycle limit to sync cycle */ 41 mov 112(%rsi), %ebp /* set cycle limit to sync cycle */
61 call z80_native_addr 62 call z80_native_addr
62 jmp *%r13 63 jmp *%r13
63 zskip_int: 64 zskip_int:
64 cmp 112(%rsi), %ebp 65 cmp 112(%rsi), %ebp
65 jb zskip_sync 66 jb zskip_sync
67 mov %r13w, 164(%rsi)
66 .global z80_do_sync 68 .global z80_do_sync
67 z80_do_sync: 69 z80_do_sync:
68 call z80_save_context 70 call z80_save_context
69 pop (%rsi) /*return address in native code*/ 71 pop (%rsi) /*return address in native code*/
70 pop %r15 /* restore callee saved regsiters */ 72 pop %r15 /* restore callee saved regsiters */
242 .global z80_io_write 244 .global z80_io_write
243 z80_io_write: 245 z80_io_write:
244 call z_inccycles_io 246 call z_inccycles_io
245 /* genesis Z80 has no IO port hardware and writes have no effect */ 247 /* genesis Z80 has no IO port hardware and writes have no effect */
246 ret 248 ret
247 249
248 .global z80_retrans_stub 250 .global z80_retrans_stub
249 z80_retrans_stub: 251 z80_retrans_stub:
250 pop %r14 252 pop %r14
251 call z80_save_context 253 call z80_save_context
252 /* adjust for mov and call instructions */ 254 /* adjust for mov and call instructions */
262 264
263 .global z80_native_addr 265 .global z80_native_addr
264 z80_native_addr: 266 z80_native_addr:
265 call z80_save_context 267 call z80_save_context
266 push %rsi 268 push %rsi
267 mov %rsi, %rdi 269 mov %rsi, %rdi
268 movzx %r13w, %esi 270 movzx %r13w, %esi
269 call z80_get_native_address_trans 271 call z80_get_native_address_trans
270 mov %rax, %r13 272 mov %rax, %r13
271 pop %rsi 273 pop %rsi
272 call z80_load_context 274 call z80_load_context
273 ret 275 ret
274 276
275 z80_save_context_scratch: 277 z80_save_context_scratch:
276 mov %r13w, 98(%rsi) /* scratch1 */ 278 mov %r13w, 98(%rsi) /* scratch1 */
277 mov %r14w, 100(%rsi) /* scratch2 */ 279 mov %r14w, 100(%rsi) /* scratch2 */
278 280
279 .global z80_save_context 281 .global z80_save_context
280 z80_save_context: 282 z80_save_context:
281 mov %r9w, 8(%rsi) /* SP */ 283 mov %r9w, 8(%rsi) /* SP */
282 mov %r15w, 16(%rsi) /* bank register */ 284 mov %r15w, 16(%rsi) /* bank register */
283 mov %bx, 18(%rsi) /* BC */ 285 mov %bx, 18(%rsi) /* BC */
293 295
294 296
295 z80_load_context_scratch: 297 z80_load_context_scratch:
296 mov 98(%rsi), %r13w /* scratch1 */ 298 mov 98(%rsi), %r13w /* scratch1 */
297 mov 100(%rsi), %r14w /* scratch2 */ 299 mov 100(%rsi), %r14w /* scratch2 */
298 300
299 .global z80_load_context 301 .global z80_load_context
300 z80_load_context: 302 z80_load_context:
301 mov 8(%rsi), %r9w /* SP */ 303 mov 8(%rsi), %r9w /* SP */
302 mov 16(%rsi), %r15w /* bank register */ 304 mov 16(%rsi), %r15w /* bank register */
303 mov 18(%rsi), %bx /* BC */ 305 mov 18(%rsi), %bx /* BC */
326 je no_extra 328 je no_extra
327 push 104(%rsi) 329 push 104(%rsi)
328 movq $0, 104(%rsi) 330 movq $0, 104(%rsi)
329 no_extra: 331 no_extra:
330 jmp *(%rsi) 332 jmp *(%rsi)
331 333