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comparison runtime.S @ 150:3e68e517cc01

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Do a sync when interrupt mask changes so we can recompute the next interrupt cycle. Also fix a bug in which the SR part of ORI to SR was not being performed.
author Mike Pavone <pavone@retrodev.com>
date Tue, 01 Jan 2013 09:40:17 -0800
parents 139e5dcd6aa3
children 79958b95526f
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149:139e5dcd6aa3 150:3e68e517cc01
1 1
2 .global handle_cycle_limit 2 .global handle_cycle_limit
3 .global do_sync
3 handle_cycle_limit: 4 handle_cycle_limit:
4 cmp 84(%rsi), %eax 5 cmp 84(%rsi), %eax
5 jb skip_sync 6 jb skip_sync
7 do_sync:
6 call m68k_save_context 8 call m68k_save_context
7 mov %rsi, %rdi 9 mov %rsi, %rdi
8 call sync_components 10 call sync_components
9 mov %rax, %rsi 11 mov %rax, %rsi
10 call m68k_load_context 12 call m68k_load_context
47 call m68k_native_addr_and_sync 49 call m68k_native_addr_and_sync
48 add $24, %eax 50 add $24, %eax
49 /* discard function return address */ 51 /* discard function return address */
50 pop %rdi 52 pop %rdi
51 jmp *%rcx 53 jmp *%rcx
54 ret
52 skip_int: 55 skip_int:
53 ret 56 cmp 84(%rsi), %eax
57 jnb do_sync
58 ret
59
60 .global do_sync
54 61
55 int_dbg_msg: 62 int_dbg_msg:
56 .asciz "Executing Interrupt!" 63 .asciz "Executing Interrupt!"
57 print_int_dbg: 64 print_int_dbg:
58 call m68k_save_context 65 call m68k_save_context