Mercurial > repos > blastem
annotate runtime.S @ 353:a60e527cd21f
Updated todo list
author | Mike Pavone <pavone@retrodev.com> |
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date | Wed, 22 May 2013 09:37:02 -0700 |
parents | 3923dbc2dcc4 |
children | 8e136187c0e0 |
rev | line source |
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17
de0085d4ea40
Add asssembly runtime code stub
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1 |
18
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
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2 .global handle_cycle_limit |
150
3e68e517cc01
Do a sync when interrupt mask changes so we can recompute the next interrupt cycle. Also fix a bug in which the SR part of ORI to SR was not being performed.
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3 .global do_sync |
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M68K to x86 translation works for a limited subset of instructions and addressing modes
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4 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).
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5 cmp 84(%rsi), %eax |
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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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6 jb skip_sync |
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Do a sync when interrupt mask changes so we can recompute the next interrupt cycle. Also fix a bug in which the SR part of ORI to SR was not being performed.
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7 do_sync: |
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467bfa17004a
Mostly working runtime generation of memory map read/write functions
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8 push %rcx |
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Mostly working runtime generation of memory map read/write functions
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9 push %rdi |
54
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
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10 call m68k_save_context |
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11 mov %rsi, %rdi |
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Add support for breaking into the debugger while game is running
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12 xor %esi, %esi |
54
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13 call sync_components |
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14 mov %rax, %rsi |
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15 call m68k_load_context |
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16 pop %rdi |
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Mostly working runtime generation of memory map read/write functions
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17 pop %rcx |
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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
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18 skip_sync: |
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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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19 ret |
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vertical interrupts now work
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20 |
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Don't update interrupt mask on non-interrupt exceptions
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21 sr_msg_int: |
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22 .asciz "SR set to $%X due to interrupt\n" |
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23 debug_print_sr_int: |
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24 call m68k_save_context |
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25 push %rsi |
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26 lea sr_msg_int(%rip), %rdi |
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27 movzxb 5(%rsi), %rsi |
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28 xor %rax, %rax |
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29 call printf |
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30 pop %rsi |
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31 call m68k_load_context |
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32 ret |
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33 |
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34 sr_msg: |
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35 .asciz "SR set to $%X\n" |
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36 .global debug_print_sr |
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37 debug_print_sr: |
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38 call m68k_save_context |
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39 push %rsi |
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40 lea sr_msg(%rip), %rdi |
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Don't update interrupt mask on non-interrupt exceptions
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41 movzxb 5(%rsi), %rsi |
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Don't update interrupt mask on non-interrupt exceptions
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42 xor %rax, %rax |
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Don't update interrupt mask on non-interrupt exceptions
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43 call printf |
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44 pop %rsi |
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45 call m68k_load_context |
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46 ret |
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Print a message when we try to run an invalid instruction, not when we try to translate it
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47 |
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48 invalid_msg: |
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49 .asciz "Invalid instruction at %X\n" |
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50 |
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51 .global m68k_invalid |
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52 m68k_invalid: |
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53 lea invalid_msg(%rip), %rdi |
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54 mov %ecx, %esi |
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55 xor %rax, %rax |
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56 call printf |
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57 mov $1, %rdi |
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58 call exit |
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Implement ABCD an SBCD. Fix BTEST with register source.
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59 |
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60 .global bcd_add |
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61 bcd_add: |
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62 xchg %rax, %rdi |
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63 |
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64 mov %cl, %ch |
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65 mov %al, %ah |
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66 and $0xF, %ch |
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67 and $0xF, %ah |
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68 and $0xF0, %cl |
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69 and $0xF0, %al |
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70 add %ah, %ch |
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71 cmp $10, %ch |
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72 jb no_adjust |
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73 add $6, %ch |
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74 no_adjust: |
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75 add %ch, %al |
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76 add %al, %cl |
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77 mov $0, %ch |
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78 jc def_adjust |
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79 cmp $0xA0, %cl |
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80 jb no_adjust_h |
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81 def_adjust: |
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82 add $0x60, %cl |
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83 mov $1, %ch |
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84 no_adjust_h: |
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85 |
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86 mov %rdi, %rax |
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87 ret |
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88 |
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89 .global bcd_sub |
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90 bcd_sub: |
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91 xchg %rax, %rdi |
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92 |
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93 mov %cl, %ch |
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94 mov %al, %ah |
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95 and $0xF, %ch |
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96 and $0xF, %ah |
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97 and $0xF0, %cl |
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98 and $0xF0, %al |
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99 sub %ah, %ch |
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100 cmp $10, %ch |
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101 jb no_adjusts |
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102 sub $6, %ch |
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103 no_adjusts: |
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104 add %ch, %cl |
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105 sub %al, %cl |
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106 mov $0, %ch |
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107 jc def_adjusts |
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108 cmp $0xA0, %cl |
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109 jb no_adjust_hs |
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110 def_adjusts: |
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111 sub $0x60, %cl |
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112 mov $1, %ch |
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113 no_adjust_hs: |
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114 |
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115 mov %rdi, %rax |
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116 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
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|
117 |
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:
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|
118 .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).
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parents:
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|
119 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:
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diff
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|
120 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:
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diff
changeset
|
121 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
|
122 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
|
123 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:
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diff
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|
124 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
|
125 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
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|
126 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:
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|
127 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:
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changeset
|
128 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:
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|
129 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>
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|
130 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>
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|
131 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:
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|
132 |
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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|
133 .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).
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|
134 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>
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|
135 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:
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|
136 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:
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diff
changeset
|
137 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:
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diff
changeset
|
138 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:
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changeset
|
139 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
|
140 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:
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diff
changeset
|
141 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
|
142 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
|
143 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
|
144 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
|
145 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
|
146 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
|
147 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:
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changeset
|
148 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:
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changeset
|
149 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
|
150 mov %cl, 5(%rsi) |
321
146c87616b05
Don't update interrupt mask on non-interrupt exceptions
Mike Pavone <pavone@retrodev.com>
parents:
320
diff
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|
151 /* call debug_print_sr */ |
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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|
152 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:
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|
153 |
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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|
154 .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>
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155 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:
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changeset
|
156 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
|
157 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
|
158 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:
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diff
changeset
|
159 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
|
160 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
|
161 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
|
162 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
|
163 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
|
164 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
|
165 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
|
166 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
|
167 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
|
168 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
|
169 mov %cl, (%rsi) |
54
3b79cbcf6846
Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents:
53
diff
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|
170 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
|
171 |
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
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diff
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|
172 .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>
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diff
changeset
|
173 m68k_modified_ret_addr: |
145
15b8dce19cf4
Implement m68k_modified_ret_addr
Mike Pavone <pavone@retrodev.com>
parents:
138
diff
changeset
|
174 add $16, %rsp |
15b8dce19cf4
Implement m68k_modified_ret_addr
Mike Pavone <pavone@retrodev.com>
parents:
138
diff
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|
175 call m68k_native_addr |
15b8dce19cf4
Implement m68k_modified_ret_addr
Mike Pavone <pavone@retrodev.com>
parents:
138
diff
changeset
|
176 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
|
177 |
86
3d3966c254b2
RTE doesn't crash the emulator anymore
Mike Pavone <pavone@retrodev.com>
parents:
85
diff
changeset
|
178 .global m68k_native_addr_and_sync |
3d3966c254b2
RTE doesn't crash the emulator anymore
Mike Pavone <pavone@retrodev.com>
parents:
85
diff
changeset
|
179 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
|
180 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
|
181 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
|
182 mov %rsi, %rdi |
198
209a37eed3e7
Add support for breaking into the debugger while game is running
Mike Pavone <pavone@retrodev.com>
parents:
194
diff
changeset
|
183 xor %esi, %esi |
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
|
184 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
|
185 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
|
186 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
|
187 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
|
188 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
|
189 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
|
190 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
|
191 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
|
192 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
|
193 |
86
3d3966c254b2
RTE doesn't crash the emulator anymore
Mike Pavone <pavone@retrodev.com>
parents:
85
diff
changeset
|
194 .global m68k_native_addr |
3d3966c254b2
RTE doesn't crash the emulator anymore
Mike Pavone <pavone@retrodev.com>
parents:
85
diff
changeset
|
195 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
|
196 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
|
197 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
|
198 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
|
199 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
|
200 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
|
201 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
|
202 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
|
203 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
|
204 ret |
193
c66e4636f991
Implement support for self-modifying code
Mike Pavone <pavone@retrodev.com>
parents:
176
diff
changeset
|
205 |
c66e4636f991
Implement support for self-modifying code
Mike Pavone <pavone@retrodev.com>
parents:
176
diff
changeset
|
206 .global m68k_retrans_stub |
c66e4636f991
Implement support for self-modifying code
Mike Pavone <pavone@retrodev.com>
parents:
176
diff
changeset
|
207 m68k_retrans_stub: |
c66e4636f991
Implement support for self-modifying code
Mike Pavone <pavone@retrodev.com>
parents:
176
diff
changeset
|
208 call m68k_save_context |
c66e4636f991
Implement support for self-modifying code
Mike Pavone <pavone@retrodev.com>
parents:
176
diff
changeset
|
209 push %rsi |
c66e4636f991
Implement support for self-modifying code
Mike Pavone <pavone@retrodev.com>
parents:
176
diff
changeset
|
210 call m68k_retranslate_inst |
c66e4636f991
Implement support for self-modifying code
Mike Pavone <pavone@retrodev.com>
parents:
176
diff
changeset
|
211 pop %rsi |
c66e4636f991
Implement support for self-modifying code
Mike Pavone <pavone@retrodev.com>
parents:
176
diff
changeset
|
212 mov %rax, %rcx |
c66e4636f991
Implement support for self-modifying code
Mike Pavone <pavone@retrodev.com>
parents:
176
diff
changeset
|
213 call m68k_load_context |
c66e4636f991
Implement support for self-modifying code
Mike Pavone <pavone@retrodev.com>
parents:
176
diff
changeset
|
214 jmp *%rcx |
53
44e661913a51
Add preliminary support for JMP
Mike Pavone <pavone@retrodev.com>
parents:
18
diff
changeset
|
215 |
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
|
216 .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
|
217 m68k_save_context: |
3e7bfde7606e
M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
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218 mov %bl, 1(%rsi) /* N Flag */ |
207 | 219 mov %dl, 2(%rsi) /* Z flag */ |
220 mov %bh, 3(%rsi) /* V flag */ | |
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221 mov %dh, 4(%rsi) /* C flag */ |
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222 mov %r10d, 8(%rsi) /* d0 */ |
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223 mov %r11d, 12(%rsi) /* d1 */ |
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224 mov %r12d, 16(%rsi) /* d2 */ |
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225 mov %r13d, 40(%rsi) /* a0 */ |
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226 mov %r14d, 44(%rsi) /* a1 */ |
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227 mov %r15d, 68(%rsi) /* a7 */ |
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228 mov %eax, 80(%rsi) /* current cycle count */ |
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229 ret |
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230 |
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231 .global m68k_load_context |
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232 m68k_load_context: |
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233 mov 1(%rsi), %bl /* N Flag */ |
207 | 234 mov 2(%rsi), %dl /* Z flag */ |
235 mov 3(%rsi), %bh /* V flag */ | |
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236 mov 4(%rsi), %dh /* C flag */ |
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237 mov 8(%rsi), %r10d /* d0 */ |
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238 mov 12(%rsi), %r11d /* d1 */ |
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239 mov 16(%rsi), %r12d /* d2 */ |
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240 mov 40(%rsi), %r13d /* a0 */ |
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241 mov 44(%rsi), %r14d /* a1 */ |
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242 mov 68(%rsi), %r15d /* a7 */ |
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243 mov 76(%rsi), %ebp /* target cycle count */ |
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244 mov 80(%rsi), %eax /* current cycle count */ |
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245 mov 96(%rsi), %r8d /* cartridge address */ |
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246 mov 104(%rsi), %r9d /* work ram address */ |
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247 ret |
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248 |
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249 .global m68k_start_context |
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250 m68k_start_context: |
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251 push %rbp |
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252 push %r12 |
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253 push %r13 |
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254 push %r14 |
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255 push %r15 |
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256 |
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257 call m68k_load_context |
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258 call *%rdi |
209
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259 call m68k_save_context |
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260 |
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261 pop %r15 |
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262 pop %r14 |
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263 pop %r13 |
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264 pop %r12 |
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265 pop %rbp |
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266 |
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267 ret |