Mercurial > repos > blastem
annotate runtime.S @ 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).
author | Mike Pavone <pavone@retrodev.com> |
---|---|
date | Wed, 26 Dec 2012 11:09:04 -0800 |
parents | 7935cd64d5c8 |
children | 2c7267617d71 |
rev | line source |
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17
de0085d4ea40
Add asssembly runtime code stub
Mike Pavone <pavone@retrodev.com>
parents:
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1 |
18
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
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2 .global handle_cycle_limit |
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
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17
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3 handle_cycle_limit: |
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
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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
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5 jb skip_sync |
54
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
53
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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>
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53
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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18 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
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19 /* 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
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20 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
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21 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
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22 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
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23 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
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24 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
|
25 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
|
26 /* 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
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27 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
|
28 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
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29 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
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30 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
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31 /* 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
|
32 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
|
33 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
|
34 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
|
35 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
|
36 /* 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
|
37 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
|
38 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
|
39 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
|
40 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
|
41 /* 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
|
42 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
|
43 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
|
44 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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45 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
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46 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
|
47 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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48 /* 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
|
49 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
|
50 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
|
51 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
|
52 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
|
53 |
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
|
54 .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
|
55 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
|
56 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
|
57 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
|
58 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
|
59 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
|
60 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
|
61 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
|
62 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
|
63 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
|
64 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
|
65 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
|
66 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
|
67 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
|
68 |
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 .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
|
70 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
|
71 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
|
72 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
|
73 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
|
74 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
|
75 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
|
76 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
|
77 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
|
78 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
|
79 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
|
80 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
|
81 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
|
82 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
|
83 and $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
|
84 mov %cl, (%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
|
85 shr $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
|
86 mov %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
|
87 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
|
88 |
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 .global set_ccr |
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 set_ccr: |
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 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
|
92 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
|
93 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
|
94 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
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|
95 and $1, %bh |
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96 shr $1, %cl |
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97 mov %cl, %dl |
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98 and $1, %dl |
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99 shr $1, %cl |
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100 mov %cl, %bl |
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101 and $1, %bl |
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102 shr $1, %cl |
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103 and $1, %cl |
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104 mov %cl, (%rsi) |
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105 ret |
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106 |
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107 do_vdp_port_write: |
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108 call m68k_save_context |
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109 mov %rcx, %rdx |
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110 call vdp_port_write |
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111 mov %rax, %rsi |
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112 call m68k_load_context |
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113 ret |
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114 |
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115 do_vdp_port_read: |
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116 mov %ecx, %edi |
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117 call m68k_save_context |
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118 call vdp_port_read |
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119 mov %rax, %rsi |
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120 call m68k_load_context |
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121 mov 136(%rsi), %cx |
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122 ret |
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123 |
66 | 124 do_io_write: |
125 call m68k_save_context | |
126 and $0xFF, %edi | |
127 mov %rcx, %rdx | |
128 call io_write | |
129 mov %rax, %rsi | |
130 call m68k_load_context | |
131 ret | |
132 do_io_read: | |
133 mov %ecx, %edi | |
134 and $0xFF, %edi | |
135 call m68k_save_context | |
136 call io_read | |
137 mov %rax, %rsi | |
138 call m68k_load_context | |
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139 mov 136(%rsi), %cl |
66 | 140 ret |
141 | |
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142 bad_access_msg: |
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143 .asciz "Program tried to access illegal 68K address %X\n" |
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144 |
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145 .global m68k_write_word |
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146 .global try_fifo_write |
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147 m68k_write_word: |
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148 call inccycles |
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149 and $0xFFFFFF, %rdi |
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150 cmp $0x400000, %edi |
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151 jle cart_w |
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152 cmp $0xE00000, %edi |
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153 jge workram_w |
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154 cmp $0xC00000, %edi |
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155 jge vdp_psg_w |
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156 ret |
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157 workram_w: |
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158 and $0xFFFF, %rdi |
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159 mov %cx, (%r9, %rdi) |
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160 ret |
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161 cart_w: |
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162 mov %cx, (%r8, %rdi) |
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163 ret |
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164 vdp_psg_w: |
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165 test $0x2700E0, %edi |
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166 jnz crash |
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167 and $0x1F, %edi |
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168 cmp $4, %edi |
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169 jl try_fifo_write |
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170 jmp do_vdp_port_write |
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171 try_fifo_write: |
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172 push %rdx |
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173 push %rbx |
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174 /* fetch VDP context pointer from 68K context */ |
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175 mov 128(%rsi), %rdx |
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176 /* get fifo_cur and compare it to fifo_end */ |
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177 mov (%rdx), %rbx |
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178 cmp %rbx, 8(%rdx) |
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179 /* bail out if fifo is full */ |
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180 je fifo_fallback |
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181 /* populate FIFO entry */ |
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182 mov %cx, 4(%rbx) /* value */ |
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183 movb $0, 6(%rbx) /* partial */ |
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184 mov %eax, %ecx |
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185 shl $3, %ecx /* multiply by 68K cycle by 7 to get MCLK cycle */ |
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186 sub %eax, %ecx |
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187 mov %ecx, (%rbx) /* cycle */ |
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188 /* update fifo_cur and store back in 68K context */ |
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189 add $8, %rbx |
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190 mov %rbx, (%rdx) |
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191 /* clear pending flag */ |
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192 andb $0xEF, 19(%rdx) |
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193 pop %rbx |
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194 pop %rdx |
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195 ret |
54
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196 fifo_fallback: |
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197 pop %rbx |
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198 pop %rdx |
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199 jmp do_vdp_port_write |
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200 crash: |
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201 mov %edi, %esi |
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202 lea bad_access_msg(%rip), %rdi |
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203 call printf |
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204 mov $1, %rdi |
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205 call exit |
18
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206 |
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207 .global m68k_write_byte |
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208 m68k_write_byte: |
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209 call inccycles |
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210 and $0xFFFFFF, %rdi |
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211 /* deal with byte swapping */ |
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212 xor $1, %edi |
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213 cmp $0x400000, %edi |
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214 jle cart_wb |
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215 cmp $0xE00000, %edi |
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216 jge workram_wb |
66 | 217 cmp $0xC00000, %edi |
218 jge vdp_psg_wb | |
219 cmp $0xA10000, %edi | |
220 jl not_io_wb | |
221 cmp $0xA10100, %edi | |
222 jge not_io_wb | |
223 jmp do_io_write | |
224 not_io_wb: | |
64
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225 ret |
18
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226 workram_wb: |
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227 and $0xFFFF, %rdi |
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diff
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|
228 mov %cl, (%r9, %rdi) |
64
2b1a65f4b85d
Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
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|
229 ret |
18
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17
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changeset
|
230 cart_wb: |
3e7bfde7606e
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17
diff
changeset
|
231 mov %cl, (%r8, %rdi) |
64
2b1a65f4b85d
Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
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diff
changeset
|
232 ret |
66 | 233 vdp_psg_wb: |
234 push %rdx | |
235 mov %cl, %dl | |
236 and $0xFF, %cx | |
237 shl $8, %dx | |
238 or %dx, %cx | |
239 pop %rdx | |
240 jmp vdp_psg_w | |
18
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17
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|
241 |
3e7bfde7606e
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|
242 .global m68k_write_long_lowfirst |
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|
243 m68k_write_long_lowfirst: |
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|
244 push %rdi |
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diff
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|
245 add $2, %edi |
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|
246 call m68k_write_word |
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|
247 shr $16, %ecx |
3e7bfde7606e
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|
248 pop %rdi |
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|
249 jmp m68k_write_word |
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250 |
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251 .global m68k_write_long_highfirst |
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252 m68k_write_long_highfirst: |
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|
253 push %rdi |
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254 push %rcx |
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|
255 shr $16, %ecx |
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|
256 call m68k_write_word |
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|
257 pop %rcx |
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|
258 pop %rdi |
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259 add $2, %rdi |
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|
260 jmp m68k_write_word |
64
2b1a65f4b85d
Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
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|
261 |
2b1a65f4b85d
Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
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|
262 inccycles: |
2b1a65f4b85d
Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
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|
263 cmp %rbp, %rax |
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>
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72
diff
changeset
|
264 jnb do_limit |
64
2b1a65f4b85d
Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
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59
diff
changeset
|
265 add $4, %rax |
2b1a65f4b85d
Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
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|
266 ret |
2b1a65f4b85d
Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
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59
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|
267 do_limit: |
2b1a65f4b85d
Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
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changeset
|
268 push %rcx |
2b1a65f4b85d
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changeset
|
269 push %rdi |
2b1a65f4b85d
Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
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changeset
|
270 call handle_cycle_limit |
2b1a65f4b85d
Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
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diff
changeset
|
271 pop %rdi |
2b1a65f4b85d
Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents:
59
diff
changeset
|
272 pop %rcx |
2b1a65f4b85d
Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents:
59
diff
changeset
|
273 add $4, %rax |
2b1a65f4b85d
Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents:
59
diff
changeset
|
274 ret |
17
de0085d4ea40
Add asssembly runtime code stub
Mike Pavone <pavone@retrodev.com>
parents:
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changeset
|
275 |
18
3e7bfde7606e
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276 .global m68k_read_word_scratch1 |
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changeset
|
277 m68k_read_word_scratch1: |
64
2b1a65f4b85d
Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents:
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diff
changeset
|
278 call inccycles |
18
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
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changeset
|
279 and $0xFFFFFF, %rcx |
3e7bfde7606e
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Mike Pavone <pavone@retrodev.com>
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diff
changeset
|
280 cmp $0x400000, %ecx |
3e7bfde7606e
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changeset
|
281 jle cart |
3e7bfde7606e
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diff
changeset
|
282 cmp $0xE00000, %ecx |
3e7bfde7606e
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diff
changeset
|
283 jge workram |
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
|
284 cmp $0xC00000, %ecx |
54
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
53
diff
changeset
|
285 jge vdp_psg |
72
7935cd64d5c8
Implement word wide access to IO area
Mike Pavone <pavone@retrodev.com>
parents:
66
diff
changeset
|
286 cmp $0xA10000, %ecx |
7935cd64d5c8
Implement word wide access to IO area
Mike Pavone <pavone@retrodev.com>
parents:
66
diff
changeset
|
287 jl not_io |
7935cd64d5c8
Implement word wide access to IO area
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parents:
66
diff
changeset
|
288 cmp $0xA10100, %ecx |
7935cd64d5c8
Implement word wide access to IO area
Mike Pavone <pavone@retrodev.com>
parents:
66
diff
changeset
|
289 jge not_io |
7935cd64d5c8
Implement word wide access to IO area
Mike Pavone <pavone@retrodev.com>
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66
diff
changeset
|
290 call do_io_read |
7935cd64d5c8
Implement word wide access to IO area
Mike Pavone <pavone@retrodev.com>
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66
diff
changeset
|
291 mov %cl, %dil |
7935cd64d5c8
Implement word wide access to IO area
Mike Pavone <pavone@retrodev.com>
parents:
66
diff
changeset
|
292 and $0xFF, %cx |
7935cd64d5c8
Implement word wide access to IO area
Mike Pavone <pavone@retrodev.com>
parents:
66
diff
changeset
|
293 shl $8, %di |
7935cd64d5c8
Implement word wide access to IO area
Mike Pavone <pavone@retrodev.com>
parents:
66
diff
changeset
|
294 or %di, %cx |
7935cd64d5c8
Implement word wide access to IO area
Mike Pavone <pavone@retrodev.com>
parents:
66
diff
changeset
|
295 ret |
7935cd64d5c8
Implement word wide access to IO area
Mike Pavone <pavone@retrodev.com>
parents:
66
diff
changeset
|
296 not_io: |
18
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
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17
diff
changeset
|
297 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
|
298 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
|
299 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
|
300 workram: |
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
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17
diff
changeset
|
301 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
|
302 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
|
303 ret |
54
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
53
diff
changeset
|
304 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
|
305 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
|
306 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
|
307 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
|
308 jmp do_vdp_port_read |
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
|
309 cart: |
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
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17
diff
changeset
|
310 mov (%r8, %rcx), %cx |
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
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17
diff
changeset
|
311 ret |
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
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17
diff
changeset
|
312 |
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
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17
diff
changeset
|
313 .global m68k_read_long_scratch1 |
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
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parents:
17
diff
changeset
|
314 m68k_read_long_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
|
315 push %rcx |
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
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17
diff
changeset
|
316 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
|
317 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
|
318 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
|
319 add $2, %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
|
320 call m68k_read_word_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
|
321 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
|
322 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
|
323 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
|
324 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
|
325 |
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
diff
changeset
|
326 .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
|
327 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
|
328 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
|
329 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
|
330 /* deal with byte swapping */ |
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
diff
changeset
|
331 xor $1, %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
|
332 cmp $0x400000, %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
|
333 jle cart_b |
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
diff
changeset
|
334 cmp $0xE00000, %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
|
335 jge workram_b |
66 | 336 cmp $0xA10000, %ecx |
337 jl not_io_b | |
338 cmp $0xA10100, %ecx | |
339 jge not_io_b | |
340 jmp do_io_read | |
341 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
|
342 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
|
343 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
|
344 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
|
345 workram_b: |
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
diff
changeset
|
346 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
|
347 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
|
348 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
|
349 cart_b: |
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents:
17
diff
changeset
|
350 mov (%r8, %rcx), %cl |
64
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351 ret |
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352 |
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353 ret_addr_msg: |
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354 .asciz "Program modified return address on stack: found %X, expected %X\n" |
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355 |
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356 .global m68k_modified_ret_addr |
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357 m68k_modified_ret_addr: |
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358 lea ret_addr_msg(%rip), %rdi |
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359 mov %rcx, %rsi |
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360 mov 8(%rsp), %rdx |
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361 call printf |
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362 mov $1, %rdi |
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363 call exit |
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364 |
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Add preliminary support for JMP
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365 dyn_addr_msg: |
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366 .asciz "Program needs dynamically calculated native address\n" |
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367 |
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368 .global m68k_native_addr |
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369 m68k_native_addr: |
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370 call m68k_save_context |
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371 push %rcx |
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372 mov %rsi, %rdi |
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373 call sync_components |
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374 pop %rsi |
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375 push %rax |
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376 mov 144(%rax), %rdi |
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377 call get_native_address |
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378 mov %rax, %rcx |
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379 pop %rsi |
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380 call m68k_load_context |
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381 ret |
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382 |
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383 .global m68k_native_addr_and_sync |
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384 m68k_native_addr_and_sync: |
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385 call m68k_save_context |
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386 push %rsi |
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387 mov 144(%rsi), %rdi |
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388 mov %ecx, %esi |
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389 call get_native_address |
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390 mov %rax, %rcx |
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391 pop %rsi |
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392 call m68k_load_context |
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393 ret |
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394 |
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395 .global m68k_save_context |
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396 m68k_save_context: |
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397 mov %bl, 1(%rsi) /* N Flag */ |
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398 mov %bh, 2(%rsi) /* V flag */ |
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399 mov %dl, 3(%rsi) /* Z flag */ |
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400 mov %dh, 4(%rsi) /* C flag */ |
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401 mov %r10d, 8(%rsi) /* d0 */ |
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402 mov %r11d, 12(%rsi) /* d1 */ |
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403 mov %r12d, 16(%rsi) /* d2 */ |
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404 mov %r13d, 40(%rsi) /* a0 */ |
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405 mov %r14d, 44(%rsi) /* a1 */ |
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406 mov %r15d, 68(%rsi) /* a7 */ |
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407 mov %eax, 80(%rsi) /* current cycle count */ |
18
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408 ret |
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409 |
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410 .global m68k_load_context |
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411 m68k_load_context: |
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412 mov 1(%rsi), %bl /* N Flag */ |
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413 mov 2(%rsi), %bh /* V flag */ |
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414 mov 3(%rsi), %dl /* Z flag */ |
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415 mov 4(%rsi), %dh /* C flag */ |
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416 mov 8(%rsi), %r10d /* d0 */ |
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417 mov 12(%rsi), %r11d /* d1 */ |
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418 mov 16(%rsi), %r12d /* d2 */ |
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419 mov 40(%rsi), %r13d /* a0 */ |
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420 mov 44(%rsi), %r14d /* a1 */ |
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M68K to x86 translation works for a limited subset of instructions and addressing modes
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421 mov 68(%rsi), %r15d /* a7 */ |
72
7935cd64d5c8
Implement word wide access to IO area
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422 mov 76(%rsi), %ebp /* target cycle count */ |
7935cd64d5c8
Implement word wide access to IO area
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|
423 mov 80(%rsi), %eax /* current cycle count */ |
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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72
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|
424 mov 96(%rsi), %r8d /* cartridge 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>
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|
425 mov 104(%rsi), %r9d /* work ram address */ |
18
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426 ret |
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|
427 |
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
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428 .global m68k_start_context |
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429 m68k_start_context: |
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430 call m68k_load_context |
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431 jmp *%rdi |