Mercurial > repos > blastem
annotate runtime.S @ 145:15b8dce19cf4
Implement m68k_modified_ret_addr
| author | Mike Pavone <pavone@retrodev.com> |
|---|---|
| date | Mon, 31 Dec 2012 19:17:01 -0800 |
| parents | aa3e1bb338c9 |
| children | 139e5dcd6aa3 |
| rev | line source |
|---|---|
|
17
de0085d4ea40
Add asssembly runtime code stub
Mike Pavone <pavone@retrodev.com>
parents:
diff
changeset
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1 |
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18
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
diff
changeset
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2 .global handle_cycle_limit |
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3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
diff
changeset
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3 handle_cycle_limit: |
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82
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
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4 cmp 84(%rsi), %eax |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
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5 jb skip_sync |
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54
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
53
diff
changeset
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6 call m68k_save_context |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
53
diff
changeset
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7 mov %rsi, %rdi |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
53
diff
changeset
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8 call sync_components |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
53
diff
changeset
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9 mov %rax, %rsi |
|
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
53
diff
changeset
|
10 call m68k_load_context |
|
82
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
11 skip_sync: |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
12 ret |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
13 |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
14 .global handle_cycle_limit_int |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
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15 handle_cycle_limit_int: |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
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16 cmp 88(%rsi), %eax |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
17 jb skip_int |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
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18 push %rcx |
|
87
60b5c9e2f4e0
vertical interrupts now work
Mike Pavone <pavone@retrodev.com>
parents:
86
diff
changeset
|
19 /* call print_int_dbg */ |
|
82
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
20 /* swap USP and SSP if not already in supervisor mode */ |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
21 bt $5, 5(%rsi) |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
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22 jc already_supervisor |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
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23 mov 72(%rsi), %edi |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
24 mov %r15d, 72(%rsi) |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
25 mov %edi, %r15d |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
26 already_supervisor: |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
27 /* save status register on stack */ |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
28 sub $2, %r15d |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
29 mov %r15d, %edi |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
30 call get_sr |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
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31 call m68k_write_word |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
32 /* update status register */ |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
33 andb $0xF8, 5(%rsi) |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
34 mov 92(%rsi), %cl |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
35 or $0x20, %cl |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
36 or %cl, 5(%rsi) |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
37 /* save PC */ |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
38 sub $4, %r15d |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
39 mov %r15d, %edi |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
40 pop %rcx |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
41 call m68k_write_long_lowfirst |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
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42 /* calculate interrupt vector address */ |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
43 mov 92(%rsi), %ecx |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
44 shl $2, %ecx |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
45 add $0x60, %ecx |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
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46 call m68k_read_long_scratch1 |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
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47 call m68k_native_addr_and_sync |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
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48 add $24, %eax |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
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49 /* discard function return address */ |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
50 pop %rdi |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
51 jmp *%rcx |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
52 skip_int: |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
53 ret |
|
87
60b5c9e2f4e0
vertical interrupts now work
Mike Pavone <pavone@retrodev.com>
parents:
86
diff
changeset
|
54 |
|
60b5c9e2f4e0
vertical interrupts now work
Mike Pavone <pavone@retrodev.com>
parents:
86
diff
changeset
|
55 int_dbg_msg: |
|
60b5c9e2f4e0
vertical interrupts now work
Mike Pavone <pavone@retrodev.com>
parents:
86
diff
changeset
|
56 .asciz "Executing Interrupt!" |
|
60b5c9e2f4e0
vertical interrupts now work
Mike Pavone <pavone@retrodev.com>
parents:
86
diff
changeset
|
57 print_int_dbg: |
|
60b5c9e2f4e0
vertical interrupts now work
Mike Pavone <pavone@retrodev.com>
parents:
86
diff
changeset
|
58 call m68k_save_context |
|
60b5c9e2f4e0
vertical interrupts now work
Mike Pavone <pavone@retrodev.com>
parents:
86
diff
changeset
|
59 push %rsi |
|
60b5c9e2f4e0
vertical interrupts now work
Mike Pavone <pavone@retrodev.com>
parents:
86
diff
changeset
|
60 lea int_dbg_msg(%rip), %rdi |
|
60b5c9e2f4e0
vertical interrupts now work
Mike Pavone <pavone@retrodev.com>
parents:
86
diff
changeset
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61 call puts |
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60b5c9e2f4e0
vertical interrupts now work
Mike Pavone <pavone@retrodev.com>
parents:
86
diff
changeset
|
62 pop %rsi |
|
60b5c9e2f4e0
vertical interrupts now work
Mike Pavone <pavone@retrodev.com>
parents:
86
diff
changeset
|
63 call m68k_load_context |
|
60b5c9e2f4e0
vertical interrupts now work
Mike Pavone <pavone@retrodev.com>
parents:
86
diff
changeset
|
64 ret |
|
82
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
65 |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
66 .global get_sr |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
67 get_sr: |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
68 mov 5(%rsi), %cl |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
69 shl $8, %cx |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
70 mov (%rsi), %cl |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
71 shl $1, %cl |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
72 or %bl, %cl |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
73 shl $1, %cl |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
74 or %dl, %cl |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
75 shl $1, %cl |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
76 or %bh, %cl |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
77 shl $1, %cl |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
78 or %dh, %cl |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
79 ret |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
80 |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
81 .global set_sr |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
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82 set_sr: |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
83 mov %cl, %dh |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
84 and $1, %dh |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
85 shr $1, %cl |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
86 mov %cl, %bh |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
87 and $1, %bh |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
88 shr $1, %cl |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
89 mov %cl, %dl |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
90 and $1, %dl |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
91 shr $1, %cl |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
92 mov %cl, %bl |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
93 and $1, %bl |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
94 shr $1, %cl |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
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95 and $1, %cl |
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96 mov %cl, (%rsi) |
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97 shr $8, %cx |
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98 mov %cl, 5(%rsi) |
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99 ret |
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100 |
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101 .global set_ccr |
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102 set_ccr: |
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103 mov %cl, %dh |
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104 and $1, %dh |
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105 shr $1, %cl |
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106 mov %cl, %bh |
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107 and $1, %bh |
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108 shr $1, %cl |
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109 mov %cl, %dl |
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110 and $1, %dl |
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111 shr $1, %cl |
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112 mov %cl, %bl |
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113 and $1, %bl |
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114 shr $1, %cl |
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115 and $1, %cl |
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116 mov %cl, (%rsi) |
|
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117 ret |
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118 |
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119 do_vdp_port_write: |
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120 call m68k_save_context |
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121 mov %rcx, %rdx |
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122 call vdp_port_write |
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123 mov %rax, %rsi |
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124 call m68k_load_context |
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125 ret |
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126 |
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127 do_vdp_port_read: |
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128 mov %ecx, %edi |
|
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129 call m68k_save_context |
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130 call vdp_port_read |
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131 mov %rax, %rsi |
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132 call m68k_load_context |
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133 mov 136(%rsi), %cx |
|
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134 ret |
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135 |
| 66 | 136 do_io_write: |
| 137 call m68k_save_context | |
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138 and $0x1FFF, %edi |
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139 mov %ecx, %edx |
| 66 | 140 call io_write |
| 141 mov %rax, %rsi | |
| 142 call m68k_load_context | |
| 143 ret | |
| 144 do_io_read: | |
| 145 mov %ecx, %edi | |
|
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146 and $0x1FFF, %edi |
| 66 | 147 call m68k_save_context |
| 148 call io_read | |
| 149 mov %rax, %rsi | |
| 150 call m68k_load_context | |
|
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151 mov 136(%rsi), %cl |
| 66 | 152 ret |
|
83
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153 |
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154 do_io_write_w: |
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155 call m68k_save_context |
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85
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156 and $0x1FFF, %edi |
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83
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157 mov %ecx, %edx |
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158 call io_write_w |
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159 mov %rax, %rsi |
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160 call m68k_load_context |
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161 ret |
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162 do_io_read_w: |
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163 mov %ecx, %edi |
|
85
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164 and $0x1FFF, %edi |
|
83
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165 call m68k_save_context |
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166 call io_read_w |
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167 mov %rax, %rsi |
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|
168 call m68k_load_context |
|
84
2d1ae596db7a
Fix long reads from IO ports or long reads that trigger sync cycles by saving rdi. Possibly fix word wide IO reads.
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|
169 mov 136(%rsi), %cx |
|
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170 ret |
| 66 | 171 |
|
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172 bad_access_msg: |
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|
173 .asciz "Program tried to access illegal 68K address %X\n" |
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|
174 |
|
18
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175 .global m68k_write_word |
|
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|
176 .global try_fifo_write |
|
18
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177 m68k_write_word: |
|
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Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
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|
178 call inccycles |
|
18
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179 and $0xFFFFFF, %rdi |
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180 cmp $0x400000, %edi |
|
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|
181 jbe cart_w |
|
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182 cmp $0xE00000, %edi |
|
104
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|
183 jae workram_w |
|
54
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|
184 cmp $0xC00000, %edi |
|
104
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|
185 jae vdp_psg_w |
|
85
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|
186 cmp $0xA10000, %edi |
|
104
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|
187 jb not_io_w |
|
85
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188 cmp $0xA12000, %edi |
|
104
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|
189 jae not_io_w |
|
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|
190 jmp do_io_write_w |
|
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|
191 not_io_w: |
|
64
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|
192 ret |
|
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193 workram_w: |
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194 and $0xFFFF, %rdi |
|
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|
195 mov %cx, (%r9, %rdi) |
|
64
2b1a65f4b85d
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|
196 ret |
|
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|
197 cart_w: |
|
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198 mov %cx, (%r8, %rdi) |
|
64
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|
199 ret |
|
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|
200 vdp_psg_w: |
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|
201 test $0x2700E0, %edi |
|
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|
202 jnz crash |
|
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|
203 and $0x1F, %edi |
|
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changeset
|
204 cmp $4, %edi |
|
104
a0fdaa134964
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|
205 jb try_fifo_write |
|
54
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|
206 jmp do_vdp_port_write |
|
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|
207 try_fifo_write: |
|
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|
208 push %rdx |
|
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|
209 push %rbx |
|
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changeset
|
210 /* fetch VDP context pointer from 68K context */ |
|
82
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
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|
211 mov 128(%rsi), %rdx |
|
54
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changeset
|
212 /* get fifo_cur and compare it to fifo_end */ |
|
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213 mov (%rdx), %rbx |
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214 cmp %rbx, 8(%rdx) |
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215 /* bail out if fifo is full */ |
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216 je fifo_fallback |
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217 /* populate FIFO entry */ |
| 138 | 218 mov %cx, 6(%rbx) /* value */ |
| 219 mov 16(%rdx), %cx | |
| 220 mov %cx, 4(%rbx) /* address */ | |
| 221 mov 18(%rdx), %cl | |
| 222 mov %cl, 8(%rbx) /* cd */ | |
| 223 movb $0, 9(%rbx) /* partial */ | |
|
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224 mov %eax, %ecx |
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225 shl $3, %ecx /* multiply by 68K cycle by 7 to get MCLK cycle */ |
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226 sub %eax, %ecx |
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227 mov %ecx, (%rbx) /* cycle */ |
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228 /* update fifo_cur and store back in 68K context */ |
| 138 | 229 add $12, %rbx |
|
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230 mov %rbx, (%rdx) |
| 138 | 231 /* update address register */ |
| 232 movzbw 35(%rdx), %bx | |
| 233 add %bx, 16(%rdx) | |
|
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234 /* clear pending flag */ |
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235 andb $0xEF, 19(%rdx) |
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236 pop %rbx |
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237 pop %rdx |
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238 ret |
|
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239 fifo_fallback: |
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240 pop %rbx |
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241 pop %rdx |
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242 jmp do_vdp_port_write |
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243 crash: |
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244 mov %edi, %esi |
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245 lea bad_access_msg(%rip), %rdi |
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246 call printf |
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247 mov $1, %rdi |
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248 call exit |
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249 |
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250 .global m68k_write_byte |
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251 m68k_write_byte: |
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252 call inccycles |
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253 and $0xFFFFFF, %rdi |
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254 cmp $0x400000, %edi |
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255 jbe cart_wb |
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256 cmp $0xE00000, %edi |
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257 jae workram_wb |
| 66 | 258 cmp $0xC00000, %edi |
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259 jae vdp_psg_wb |
| 66 | 260 cmp $0xA10000, %edi |
|
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261 jb not_io_wb |
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262 cmp $0xA12000, %edi |
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263 jae not_io_wb |
| 66 | 264 jmp do_io_write |
| 265 not_io_wb: | |
|
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266 ret |
|
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267 workram_wb: |
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268 /* deal with byte swapping */ |
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269 xor $1, %edi |
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270 and $0xFFFF, %rdi |
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271 mov %cl, (%r9, %rdi) |
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272 ret |
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273 cart_wb: |
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274 /* deal with byte swapping */ |
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275 xor $1, %edi |
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276 mov %cl, (%r8, %rdi) |
|
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277 ret |
| 66 | 278 vdp_psg_wb: |
| 279 push %rdx | |
| 280 mov %cl, %dl | |
| 281 and $0xFF, %cx | |
| 282 shl $8, %dx | |
| 283 or %dx, %cx | |
| 284 pop %rdx | |
| 285 jmp vdp_psg_w | |
|
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286 |
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287 .global m68k_write_long_lowfirst |
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288 m68k_write_long_lowfirst: |
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289 push %rdi |
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290 push %rcx |
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291 add $2, %edi |
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292 call m68k_write_word |
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293 pop %rcx |
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294 pop %rdi |
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295 shr $16, %ecx |
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296 jmp m68k_write_word |
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297 |
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298 .global m68k_write_long_highfirst |
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299 m68k_write_long_highfirst: |
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300 push %rdi |
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301 push %rcx |
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302 shr $16, %ecx |
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303 call m68k_write_word |
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304 pop %rcx |
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305 pop %rdi |
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306 add $2, %rdi |
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307 jmp m68k_write_word |
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308 |
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309 inccycles: |
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310 cmp %rbp, %rax |
|
82
6331ddec228f
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311 jnb do_limit |
|
64
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312 add $4, %rax |
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313 ret |
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314 do_limit: |
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315 push %rcx |
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316 push %rdi |
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317 call handle_cycle_limit |
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318 pop %rdi |
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319 pop %rcx |
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320 add $4, %rax |
|
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|
321 ret |
|
17
de0085d4ea40
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322 |
|
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323 .global m68k_read_word_scratch1 |
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324 m68k_read_word_scratch1: |
|
64
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325 call inccycles |
|
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326 and $0xFFFFFF, %rcx |
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327 cmp $0x400000, %ecx |
|
104
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328 jbe cart |
|
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329 cmp $0xE00000, %ecx |
|
104
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330 jae workram |
|
57
bc3bc7a60c4e
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331 cmp $0xC00000, %ecx |
|
104
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332 jae vdp_psg |
|
72
7935cd64d5c8
Implement word wide access to IO area
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333 cmp $0xA10000, %ecx |
|
104
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334 jb not_io |
|
85
1db2a0b655d1
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335 cmp $0xA12000, %ecx |
|
104
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336 jae not_io |
|
83
2c7267617d71
Implement Z80 reset and bus request registers.
Mike Pavone <pavone@retrodev.com>
parents:
82
diff
changeset
|
337 call do_io_read_w |
|
72
7935cd64d5c8
Implement word wide access to IO area
Mike Pavone <pavone@retrodev.com>
parents:
66
diff
changeset
|
338 ret |
|
7935cd64d5c8
Implement word wide access to IO area
Mike Pavone <pavone@retrodev.com>
parents:
66
diff
changeset
|
339 not_io: |
|
18
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
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parents:
17
diff
changeset
|
340 xor %cx, %cx |
|
54
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
53
diff
changeset
|
341 dec %cx |
|
64
2b1a65f4b85d
Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents:
59
diff
changeset
|
342 ret |
|
18
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
diff
changeset
|
343 workram: |
|
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
diff
changeset
|
344 and $0xFFFF, %rcx |
|
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
diff
changeset
|
345 mov (%r9, %rcx), %cx |
|
64
2b1a65f4b85d
Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents:
59
diff
changeset
|
346 ret |
|
54
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
53
diff
changeset
|
347 vdp_psg: |
|
57
bc3bc7a60c4e
Code in runtime for checking for VDP reads was using the wrong register. This is now fixed.
Mike Pavone <pavone@retrodev.com>
parents:
54
diff
changeset
|
348 test $0x2700E0, %ecx |
|
54
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
53
diff
changeset
|
349 jnz crash |
|
57
bc3bc7a60c4e
Code in runtime for checking for VDP reads was using the wrong register. This is now fixed.
Mike Pavone <pavone@retrodev.com>
parents:
54
diff
changeset
|
350 and $0x1F, %ecx |
|
54
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
53
diff
changeset
|
351 jmp do_vdp_port_read |
|
18
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
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parents:
17
diff
changeset
|
352 cart: |
|
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
diff
changeset
|
353 mov (%r8, %rcx), %cx |
|
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
diff
changeset
|
354 ret |
|
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
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parents:
17
diff
changeset
|
355 |
|
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
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parents:
17
diff
changeset
|
356 .global m68k_read_long_scratch1 |
|
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
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17
diff
changeset
|
357 m68k_read_long_scratch1: |
|
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
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17
diff
changeset
|
358 push %rcx |
|
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
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17
diff
changeset
|
359 call m68k_read_word_scratch1 |
|
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
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17
diff
changeset
|
360 mov %cx, %di |
|
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
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17
diff
changeset
|
361 pop %rcx |
|
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
diff
changeset
|
362 add $2, %ecx |
|
84
2d1ae596db7a
Fix long reads from IO ports or long reads that trigger sync cycles by saving rdi. Possibly fix word wide IO reads.
Mike Pavone <pavone@retrodev.com>
parents:
83
diff
changeset
|
363 push %rdi |
|
18
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
diff
changeset
|
364 call m68k_read_word_scratch1 |
|
84
2d1ae596db7a
Fix long reads from IO ports or long reads that trigger sync cycles by saving rdi. Possibly fix word wide IO reads.
Mike Pavone <pavone@retrodev.com>
parents:
83
diff
changeset
|
365 pop %rdi |
|
18
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
diff
changeset
|
366 and $0xFFFF, %ecx |
|
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
diff
changeset
|
367 shl $16, %edi |
|
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
diff
changeset
|
368 or %edi, %ecx |
|
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
diff
changeset
|
369 ret |
|
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
diff
changeset
|
370 |
|
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
diff
changeset
|
371 .global m68k_read_byte_scratch1 |
|
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
diff
changeset
|
372 m68k_read_byte_scratch1: |
|
64
2b1a65f4b85d
Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents:
59
diff
changeset
|
373 call inccycles |
|
18
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
diff
changeset
|
374 and $0xFFFFFF, %rcx |
|
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
diff
changeset
|
375 cmp $0x400000, %ecx |
|
104
a0fdaa134964
Use unsigned comparisons for address decoding, exit when we hit an unhandled addressing mode for jmp
Mike Pavone <pavone@retrodev.com>
parents:
95
diff
changeset
|
376 jbe cart_b |
|
18
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
diff
changeset
|
377 cmp $0xE00000, %ecx |
|
104
a0fdaa134964
Use unsigned comparisons for address decoding, exit when we hit an unhandled addressing mode for jmp
Mike Pavone <pavone@retrodev.com>
parents:
95
diff
changeset
|
378 jae workram_b |
| 137 | 379 cmp $0xC00000, %ecx |
| 380 jae vdp_psg_b | |
| 66 | 381 cmp $0xA10000, %ecx |
|
104
a0fdaa134964
Use unsigned comparisons for address decoding, exit when we hit an unhandled addressing mode for jmp
Mike Pavone <pavone@retrodev.com>
parents:
95
diff
changeset
|
382 jb not_io_b |
|
85
1db2a0b655d1
Fix Z80 BUSREQ/RESET implementation.
Mike Pavone <pavone@retrodev.com>
parents:
84
diff
changeset
|
383 cmp $0xA12000, %ecx |
|
104
a0fdaa134964
Use unsigned comparisons for address decoding, exit when we hit an unhandled addressing mode for jmp
Mike Pavone <pavone@retrodev.com>
parents:
95
diff
changeset
|
384 jae not_io_b |
| 66 | 385 jmp do_io_read |
| 386 not_io_b: | |
|
18
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
diff
changeset
|
387 xor %cl, %cl |
|
54
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
53
diff
changeset
|
388 dec %cl |
|
64
2b1a65f4b85d
Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents:
59
diff
changeset
|
389 ret |
| 137 | 390 vdp_psg_b: |
| 391 test $0x2700E0, %ecx | |
| 392 jnz crash | |
| 393 and $0x1F, %ecx | |
| 394 bt $0, %ecx | |
| 395 jnc vdp_swap | |
| 396 jmp do_vdp_port_read | |
| 397 vdp_swap: | |
| 398 call do_vdp_port_read | |
| 399 shr $8, %cx | |
| 400 ret | |
|
18
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
diff
changeset
|
401 workram_b: |
|
83
2c7267617d71
Implement Z80 reset and bus request registers.
Mike Pavone <pavone@retrodev.com>
parents:
82
diff
changeset
|
402 /* deal with byte swapping */ |
|
2c7267617d71
Implement Z80 reset and bus request registers.
Mike Pavone <pavone@retrodev.com>
parents:
82
diff
changeset
|
403 xor $1, %ecx |
|
18
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
diff
changeset
|
404 and $0xFFFF, %rcx |
|
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
diff
changeset
|
405 mov (%r9, %rcx), %cl |
|
64
2b1a65f4b85d
Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents:
59
diff
changeset
|
406 ret |
|
18
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
diff
changeset
|
407 cart_b: |
|
83
2c7267617d71
Implement Z80 reset and bus request registers.
Mike Pavone <pavone@retrodev.com>
parents:
82
diff
changeset
|
408 /* deal with byte swapping */ |
|
2c7267617d71
Implement Z80 reset and bus request registers.
Mike Pavone <pavone@retrodev.com>
parents:
82
diff
changeset
|
409 xor $1, %ecx |
|
18
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
diff
changeset
|
410 mov (%r8, %rcx), %cl |
|
64
2b1a65f4b85d
Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents:
59
diff
changeset
|
411 ret |
|
18
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
diff
changeset
|
412 |
|
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
diff
changeset
|
413 .global m68k_modified_ret_addr |
|
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
diff
changeset
|
414 m68k_modified_ret_addr: |
|
145
15b8dce19cf4
Implement m68k_modified_ret_addr
Mike Pavone <pavone@retrodev.com>
parents:
138
diff
changeset
|
415 add $16, %rsp |
|
15b8dce19cf4
Implement m68k_modified_ret_addr
Mike Pavone <pavone@retrodev.com>
parents:
138
diff
changeset
|
416 call m68k_native_addr |
|
15b8dce19cf4
Implement m68k_modified_ret_addr
Mike Pavone <pavone@retrodev.com>
parents:
138
diff
changeset
|
417 jmp *%rcx |
|
18
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
diff
changeset
|
418 |
|
53
44e661913a51
Add preliminary support for JMP
Mike Pavone <pavone@retrodev.com>
parents:
18
diff
changeset
|
419 dyn_addr_msg: |
|
44e661913a51
Add preliminary support for JMP
Mike Pavone <pavone@retrodev.com>
parents:
18
diff
changeset
|
420 .asciz "Program needs dynamically calculated native address\n" |
|
44e661913a51
Add preliminary support for JMP
Mike Pavone <pavone@retrodev.com>
parents:
18
diff
changeset
|
421 |
|
86
3d3966c254b2
RTE doesn't crash the emulator anymore
Mike Pavone <pavone@retrodev.com>
parents:
85
diff
changeset
|
422 .global m68k_native_addr_and_sync |
|
3d3966c254b2
RTE doesn't crash the emulator anymore
Mike Pavone <pavone@retrodev.com>
parents:
85
diff
changeset
|
423 m68k_native_addr_and_sync: |
|
82
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
424 call m68k_save_context |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
425 push %rcx |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
426 mov %rsi, %rdi |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
427 call sync_components |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
428 pop %rsi |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
429 push %rax |
|
95
dd3c680c618c
Initial work on allowing dynamic branches and code in RAM plus a small fix to effective address decoding
Mike Pavone <pavone@retrodev.com>
parents:
87
diff
changeset
|
430 mov %rax, %rdi |
|
dd3c680c618c
Initial work on allowing dynamic branches and code in RAM plus a small fix to effective address decoding
Mike Pavone <pavone@retrodev.com>
parents:
87
diff
changeset
|
431 call get_native_address_trans |
|
82
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
432 mov %rax, %rcx |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
433 pop %rsi |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
434 call m68k_load_context |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
435 ret |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
436 |
|
86
3d3966c254b2
RTE doesn't crash the emulator anymore
Mike Pavone <pavone@retrodev.com>
parents:
85
diff
changeset
|
437 .global m68k_native_addr |
|
3d3966c254b2
RTE doesn't crash the emulator anymore
Mike Pavone <pavone@retrodev.com>
parents:
85
diff
changeset
|
438 m68k_native_addr: |
|
82
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
439 call m68k_save_context |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
440 push %rsi |
|
95
dd3c680c618c
Initial work on allowing dynamic branches and code in RAM plus a small fix to effective address decoding
Mike Pavone <pavone@retrodev.com>
parents:
87
diff
changeset
|
441 mov %rsi, %rdi |
|
82
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
442 mov %ecx, %esi |
|
95
dd3c680c618c
Initial work on allowing dynamic branches and code in RAM plus a small fix to effective address decoding
Mike Pavone <pavone@retrodev.com>
parents:
87
diff
changeset
|
443 call get_native_address_trans |
|
82
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
444 mov %rax, %rcx |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
445 pop %rsi |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
446 call m68k_load_context |
|
6331ddec228f
Initial stab at interrupt support. Make native code offsets bigger so I don't have to worry about overflowing the offset. Implement neg and not (untested).
Mike Pavone <pavone@retrodev.com>
parents:
72
diff
changeset
|
447 ret |
|
53
44e661913a51
Add preliminary support for JMP
Mike Pavone <pavone@retrodev.com>
parents:
18
diff
changeset
|
448 |
|
18
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
diff
changeset
|
449 .global m68k_save_context |
|
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
diff
changeset
|
450 m68k_save_context: |
|
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
diff
changeset
|
451 mov %bl, 1(%rsi) /* N Flag */ |
|
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
diff
changeset
|
452 mov %bh, 2(%rsi) /* V flag */ |
|
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
diff
changeset
|
453 mov %dl, 3(%rsi) /* Z flag */ |
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454 mov %dh, 4(%rsi) /* C flag */ |
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455 mov %r10d, 8(%rsi) /* d0 */ |
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456 mov %r11d, 12(%rsi) /* d1 */ |
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457 mov %r12d, 16(%rsi) /* d2 */ |
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458 mov %r13d, 40(%rsi) /* a0 */ |
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459 mov %r14d, 44(%rsi) /* a1 */ |
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460 mov %r15d, 68(%rsi) /* a7 */ |
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461 mov %eax, 80(%rsi) /* current cycle count */ |
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462 ret |
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463 |
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464 .global m68k_load_context |
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465 m68k_load_context: |
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466 mov 1(%rsi), %bl /* N Flag */ |
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467 mov 2(%rsi), %bh /* V flag */ |
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468 mov 3(%rsi), %dl /* Z flag */ |
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469 mov 4(%rsi), %dh /* C flag */ |
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470 mov 8(%rsi), %r10d /* d0 */ |
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471 mov 12(%rsi), %r11d /* d1 */ |
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472 mov 16(%rsi), %r12d /* d2 */ |
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473 mov 40(%rsi), %r13d /* a0 */ |
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474 mov 44(%rsi), %r14d /* a1 */ |
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475 mov 68(%rsi), %r15d /* a7 */ |
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476 mov 76(%rsi), %ebp /* target cycle count */ |
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477 mov 80(%rsi), %eax /* current cycle count */ |
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478 mov 96(%rsi), %r8d /* cartridge address */ |
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479 mov 104(%rsi), %r9d /* work ram address */ |
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480 ret |
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481 |
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482 .global m68k_start_context |
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483 m68k_start_context: |
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484 call m68k_load_context |
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485 jmp *%rdi |