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comparison runtime.S @ 251:4a7ac10ac2d9

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Fix target cycle count after 68K interrupt
author Mike Pavone <pavone@retrodev.com>
date Mon, 29 Apr 2013 01:14:24 -0700
parents 28a6697e847b
children e5e8b48ad157
comparison
equal deleted inserted replaced
250:5f1b68cecfc7 251:4a7ac10ac2d9
16 16
17 .global handle_cycle_limit_int 17 .global handle_cycle_limit_int
18 handle_cycle_limit_int: 18 handle_cycle_limit_int:
19 cmp 88(%rsi), %eax 19 cmp 88(%rsi), %eax
20 jb skip_int 20 jb skip_int
21 mov 84(%rsi), %ebp
21 /* swap USP and SSP if not already in supervisor mode */ 22 /* swap USP and SSP if not already in supervisor mode */
22 bt $5, 5(%rsi) 23 bt $5, 5(%rsi)
23 jc already_supervisor 24 jc already_supervisor
24 mov 72(%rsi), %edi 25 mov 72(%rsi), %edi
25 mov %r15d, 72(%rsi) 26 mov %r15d, 72(%rsi)
442 pop %rdi 443 pop %rdi
443 add $2, %rdi 444 add $2, %rdi
444 jmp m68k_write_word 445 jmp m68k_write_word
445 446
446 inccycles: 447 inccycles:
447 cmp %rbp, %rax 448 cmp %ebp, %eax
448 jnb do_limit 449 jnb do_limit
449 add $4, %rax 450 add $4, %eax
450 ret 451 ret
451 do_limit: 452 do_limit:
452 push %rcx 453 push %rcx
453 push %rdi 454 push %rdi
454 call handle_cycle_limit 455 call handle_cycle_limit
455 pop %rdi 456 pop %rdi
456 pop %rcx 457 pop %rcx
457 add $4, %rax 458 add $4, %eax
458 ret 459 ret
459 460
460 .global m68k_read_word_scratch1 461 .global m68k_read_word_scratch1
461 m68k_read_word_scratch1: 462 m68k_read_word_scratch1:
462 call inccycles 463 call inccycles