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annotate runtime.S @ 478:2e4a4188cfb0

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Fix DMA fill so that it does not cause observable changes to the FIFO. Get DMA copy mostly correct from an observable ffect perspective. DMA copy probably does not reflect internal implementation still given that evidence seems to suggest no FIFO usage at all.
author Mike Pavone <pavone@retrodev.com>
date Tue, 17 Sep 2013 00:11:45 -0700
parents 8e136187c0e0
children b449af228c63
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17
de0085d4ea40 Add asssembly runtime code stub
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
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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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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parents: 72
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5 cmp 84(%rsi), %eax
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parents: 72
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6 jb skip_sync
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7 do_sync:
343
467bfa17004a Mostly working runtime generation of memory map read/write functions
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8 push %rcx
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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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209a37eed3e7 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
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
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15 call m68k_load_context
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16 pop %rdi
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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).
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parents: 72
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18 skip_sync:
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19 ret
87
60b5c9e2f4e0 vertical interrupts now work
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20
321
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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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41 movzxb 5(%rsi), %rsi
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42 xor %rax, %rax
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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
176
e2918b5208eb Print a message when we try to run an invalid instruction, not when we try to translate it
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47
e2918b5208eb Print a message when we try to run an invalid instruction, not when we try to translate it
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48 invalid_msg:
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49 .asciz "Invalid instruction at %X\n"
e2918b5208eb Print a message when we try to run an invalid instruction, not when we try to translate it
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50
e2918b5208eb Print a message when we try to run an invalid instruction, not when we try to translate it
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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
194
811163790e6c 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).
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117
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118 .global get_sr
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119 get_sr:
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120 mov 5(%rsi), %cl
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121 shl $8, %cx
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122 mov (%rsi), %cl
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123 shl $1, %cl
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124 or %bl, %cl
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125 shl $1, %cl
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126 or %dl, %cl
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127 shl $1, %cl
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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).
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129 shl $1, %cl
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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>
parents: 72
diff changeset
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: 72
diff changeset
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).
Mike Pavone <pavone@retrodev.com>
parents: 72
diff changeset
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).
Mike Pavone <pavone@retrodev.com>
parents: 72
diff changeset
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>
parents: 72
diff changeset
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: 72
diff changeset
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: 72
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: 72
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: 72
diff 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: 72
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: 72
diff 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: 72
diff 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 changeset
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>
parents: 72
diff changeset
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: 72
diff changeset
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>
parents: 72
diff changeset
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>
parents: 72
diff changeset
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: 72
diff 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: 72
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 changeset
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>
parents: 17
diff changeset
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>
parents: 17
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 changeset
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>
parents: 17
diff changeset
218 mov %bl, 1(%rsi) /* N Flag */
207
c82f65a87a53 Fix overflow flag on ASL
Mike Pavone <pavone@retrodev.com>
parents: 198
diff changeset
219 mov %dl, 2(%rsi) /* Z flag */
c82f65a87a53 Fix overflow flag on ASL
Mike Pavone <pavone@retrodev.com>
parents: 198
diff changeset
220 mov %bh, 3(%rsi) /* V flag */
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
221 mov %dh, 4(%rsi) /* C flag */
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
222 mov %r10d, 8(%rsi) /* d0 */
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
223 mov %r11d, 12(%rsi) /* d1 */
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
224 mov %r12d, 16(%rsi) /* d2 */
423
8e136187c0e0 Use the registers that were freed up by the memory map function changes
Mike Pavone <pavone@retrodev.com>
parents: 348
diff changeset
225 mov %r8d, 20(%rsi) /* d3 */
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
226 mov %r13d, 40(%rsi) /* a0 */
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
227 mov %r14d, 44(%rsi) /* a1 */
423
8e136187c0e0 Use the registers that were freed up by the memory map function changes
Mike Pavone <pavone@retrodev.com>
parents: 348
diff changeset
228 mov %r9d, 48(%rsi) /* a2 */
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
229 mov %r15d, 68(%rsi) /* a7 */
72
7935cd64d5c8 Implement word wide access to IO area
Mike Pavone <pavone@retrodev.com>
parents: 66
diff changeset
230 mov %eax, 80(%rsi) /* current cycle count */
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
231 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
232
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
233 .global m68k_load_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
234 m68k_load_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
235 mov 1(%rsi), %bl /* N Flag */
207
c82f65a87a53 Fix overflow flag on ASL
Mike Pavone <pavone@retrodev.com>
parents: 198
diff changeset
236 mov 2(%rsi), %dl /* Z flag */
c82f65a87a53 Fix overflow flag on ASL
Mike Pavone <pavone@retrodev.com>
parents: 198
diff changeset
237 mov 3(%rsi), %bh /* V flag */
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
238 mov 4(%rsi), %dh /* C flag */
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
239 mov 8(%rsi), %r10d /* d0 */
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
240 mov 12(%rsi), %r11d /* d1 */
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
241 mov 16(%rsi), %r12d /* d2 */
423
8e136187c0e0 Use the registers that were freed up by the memory map function changes
Mike Pavone <pavone@retrodev.com>
parents: 348
diff changeset
242 mov 20(%rsi), %r8d /* d3 */
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
243 mov 40(%rsi), %r13d /* a0 */
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
244 mov 44(%rsi), %r14d /* a1 */
423
8e136187c0e0 Use the registers that were freed up by the memory map function changes
Mike Pavone <pavone@retrodev.com>
parents: 348
diff changeset
245 mov 48(%rsi), %r9d /* a2 */
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
246 mov 68(%rsi), %r15d /* a7 */
72
7935cd64d5c8 Implement word wide access to IO area
Mike Pavone <pavone@retrodev.com>
parents: 66
diff changeset
247 mov 76(%rsi), %ebp /* target cycle count */
7935cd64d5c8 Implement word wide access to IO area
Mike Pavone <pavone@retrodev.com>
parents: 66
diff changeset
248 mov 80(%rsi), %eax /* current cycle count */
18
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
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249 ret
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250
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251 .global m68k_start_context
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252 m68k_start_context:
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253 push %rbp
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254 push %r12
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255 push %r13
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256 push %r14
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257 push %r15
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258
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259 call m68k_load_context
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260 call *%rdi
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922b59c09259 Flag fixes for div, negx and not
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261 call m68k_save_context
208
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262
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263 pop %r15
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264 pop %r14
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265 pop %r13
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266 pop %r12
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267 pop %rbp
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268
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269 ret