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annotate zruntime.S @ 253:3b34deba4ca0

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Squashing some bugs introduced when I switched the register assignments for z80_write_byte around.
author Mike Pavone <pavone@retrodev.com>
date Mon, 29 Apr 2013 22:32:21 -0700
parents 63b9a500a00b
children d9417261366f
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
1 z_inccycles:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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2 cmp %edi, %ebp
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3 jnb do_limit
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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4 no_sync:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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5 add $3, %ebp
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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6 ret
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7 do_limit:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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8 cmp 112(%rsi), %ebp
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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9 jb no_sync
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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10 call z80_save_context_scratch
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11 pop %rax /*return address in read/write func*/
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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12 pop 104(%rsi) /*return address in native code*/
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13 sub $5, %rax /* adjust return addres to point to the call instruction that got us here */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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14 mov %rax, (%rsi)
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15
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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16 pop %r15 /* restore callee saved regsiters */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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17 pop %r14
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18 pop %r13
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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19 pop %r12
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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20 pop %rbp
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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21 pop %rbx
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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22 ret /* return to caller of z80_run */
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23
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24 .global z80_handle_cycle_limit_int
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25 z80_handle_cycle_limit_int:
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26 cmp 116(%rsi), %ebp
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27 jb zskip_int
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28 mov 112(%rsi), %ebp /* set cycle limit to sync cycle */
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29 add $7, %ebp
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30 sub $2, %r9w
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31 mov %r9w, %r13w
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32 call z_inccycles
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33 push %r14
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34 call z80_write_byte_noinc
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35 pop %r14
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36 mov %r9w, %r13w
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37 add $1, %r13w
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38 shr $8, %r14w
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39 call z_inccycles
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40 call z80_write_byte_noinc
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41 /* TODO: Support interrupt mode 0 and 2 */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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42 mov $0x38, %r13w
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43 call z80_native_addr
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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44 jmp *%r13
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45 zskip_int:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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46 cmp 112(%rsi), %ebp
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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47 jb zskip_sync
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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48 call z80_save_context
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49 .global z80_do_sync
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50 z80_do_sync:
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51 pop (%rsi) /*return address in native code*/
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52 pop %r15 /* restore callee saved regsiters */
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53 pop %r14
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54 pop %r13
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55 pop %r12
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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56 pop %rbp
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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57 pop %rbx
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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58 zskip_sync:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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59 ret
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60
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61 .global z80_read_byte
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62 z80_read_byte:
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63 call z_inccycles
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64 z80_read_byte_noinc:
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65 cmp $0x4000, %r13w
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66 jb z80_read_ram
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67 cmp $0x8000, %r13w
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68 jae z80_read_bank
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69 /* TODO: Bank reg, YM-2612, PSG/VDP */
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70 ret
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71 z80_read_ram:
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72 and $0x1FFF, %r13
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73 mov (%r11, %r13), %r13b
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74 ret
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75 z80_read_bank:
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76 and $0x7FFF, %r13
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77 cmp $0, %r12
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78 je slow_bank_read
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79 /* 68K memory is byte swapped */
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80 xor $1, %r13
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81 mov (%r12, %r13), %r13b
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82 ret
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83 slow_bank_read:
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84 /* TODO: Call into C to implement this */
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85 ret
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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86
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87 .global z80_write_byte
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88 z80_write_byte:
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89 call z_inccycles
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90 z80_write_byte_noinc:
253
3b34deba4ca0 Squashing some bugs introduced when I switched the register assignments for z80_write_byte around.
Mike Pavone <pavone@retrodev.com>
parents: 252
diff changeset
91 cmp $0x4000, %r14w
249
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92 jb z80_write_ram
253
3b34deba4ca0 Squashing some bugs introduced when I switched the register assignments for z80_write_byte around.
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parents: 252
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93 cmp $0x8000, %r14w
249
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94 jae z80_write_bank
253
3b34deba4ca0 Squashing some bugs introduced when I switched the register assignments for z80_write_byte around.
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parents: 252
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95 cmp $0x6000, %r14w
249
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96 je z80_write_bank_reg
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97 /* TODO: YM-2612, PSG/VDP */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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98 ret
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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99 z80_write_ram:
253
3b34deba4ca0 Squashing some bugs introduced when I switched the register assignments for z80_write_byte around.
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parents: 252
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100 and $0x1FFF, %r14
3b34deba4ca0 Squashing some bugs introduced when I switched the register assignments for z80_write_byte around.
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parents: 252
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101 mov %r13b, (%r11, %r14)
3b34deba4ca0 Squashing some bugs introduced when I switched the register assignments for z80_write_byte around.
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parents: 252
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102 mov %r14d, %r13d
3b34deba4ca0 Squashing some bugs introduced when I switched the register assignments for z80_write_byte around.
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parents: 252
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103 shr $7, %r13d
3b34deba4ca0 Squashing some bugs introduced when I switched the register assignments for z80_write_byte around.
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parents: 252
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104 bt %r13d, 152(%rsi)
252
63b9a500a00b Implement retranslating code when written to. Possibly broken, need to fix some other bugs before a proper test.
Mike Pavone <pavone@retrodev.com>
parents: 249
diff changeset
105 jnc not_code
63b9a500a00b Implement retranslating code when written to. Possibly broken, need to fix some other bugs before a proper test.
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parents: 249
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106 call z80_save_context
253
3b34deba4ca0 Squashing some bugs introduced when I switched the register assignments for z80_write_byte around.
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parents: 252
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107 mov %r14d, %edi
252
63b9a500a00b Implement retranslating code when written to. Possibly broken, need to fix some other bugs before a proper test.
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parents: 249
diff changeset
108 call z80_handle_code_write
63b9a500a00b Implement retranslating code when written to. Possibly broken, need to fix some other bugs before a proper test.
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parents: 249
diff changeset
109 mov %rax, %rsi
63b9a500a00b Implement retranslating code when written to. Possibly broken, need to fix some other bugs before a proper test.
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parents: 249
diff changeset
110 not_code:
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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111 ret
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112 z80_write_bank:
253
3b34deba4ca0 Squashing some bugs introduced when I switched the register assignments for z80_write_byte around.
Mike Pavone <pavone@retrodev.com>
parents: 252
diff changeset
113 and $0x7FFF, %r14
249
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114 cmp $0, %r12
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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115 je slow_bank_write
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116 /* 68K memory is byte swapped */
253
3b34deba4ca0 Squashing some bugs introduced when I switched the register assignments for z80_write_byte around.
Mike Pavone <pavone@retrodev.com>
parents: 252
diff changeset
117 xor $1, %r14
3b34deba4ca0 Squashing some bugs introduced when I switched the register assignments for z80_write_byte around.
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parents: 252
diff changeset
118 mov %r13b, (%r12, %r14)
249
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119 ret
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120 slow_bank_write:
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121 /* TODO: Call into C to implement this */
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122 ret
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123 z80_write_bank_reg:
253
3b34deba4ca0 Squashing some bugs introduced when I switched the register assignments for z80_write_byte around.
Mike Pavone <pavone@retrodev.com>
parents: 252
diff changeset
124 and $1, %r13w
249
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125 shl %r15w
253
3b34deba4ca0 Squashing some bugs introduced when I switched the register assignments for z80_write_byte around.
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parents: 252
diff changeset
126 or %r13w, %r15w
249
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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diff changeset
127 and $0x1FF, %r15w
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
128 xor %r12, %r12
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parents:
diff changeset
129 cmp $0x80, %r15w
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parents:
diff changeset
130 jb update_bank_ptr
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parents:
diff changeset
131 ret
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parents:
diff changeset
132 update_bank_ptr:
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
133 mov %r15w, %r12w
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
134 shl $15, %r12
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
135 add 80(%rsi), %r12
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
136 ret
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parents:
diff changeset
137
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parents:
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138 .global z80_read_word
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parents:
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139 z80_read_word:
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parents:
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140 call z_inccycles
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parents:
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141 push %r13
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parents:
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142 call z80_read_byte_noinc
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parents:
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143 mov %r13b, %r14b
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Mike Pavone <pavone@retrodev.com>
parents:
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144 pop %r13
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
145 inc %r13
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Mike Pavone <pavone@retrodev.com>
parents:
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146 call z_inccycles
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Mike Pavone <pavone@retrodev.com>
parents:
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147 call z80_read_byte_noinc
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Mike Pavone <pavone@retrodev.com>
parents:
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148 shl $8, %r13w
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parents:
diff changeset
149 mov %r14b, %r13b
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Mike Pavone <pavone@retrodev.com>
parents:
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150 ret
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parents:
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151
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parents:
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152 .global z80_write_word_highfirst
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parents:
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153 z80_write_word_highfirst:
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parents:
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154 call z_inccycles
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parents:
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155 push %r14
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parents:
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156 push %r13
253
3b34deba4ca0 Squashing some bugs introduced when I switched the register assignments for z80_write_byte around.
Mike Pavone <pavone@retrodev.com>
parents: 252
diff changeset
157 add $1, %r14w
3b34deba4ca0 Squashing some bugs introduced when I switched the register assignments for z80_write_byte around.
Mike Pavone <pavone@retrodev.com>
parents: 252
diff changeset
158 shr $8, %r13w
249
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parents:
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159 call z80_write_byte_noinc
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parents:
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160 pop %r13
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Mike Pavone <pavone@retrodev.com>
parents:
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161 pop %r14
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Mike Pavone <pavone@retrodev.com>
parents:
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162 call z_inccycles
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Mike Pavone <pavone@retrodev.com>
parents:
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163 call z80_write_byte_noinc
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Mike Pavone <pavone@retrodev.com>
parents:
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164 ret
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parents:
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165
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parents:
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166 .global z80_write_word_lowfirst
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parents:
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167 z80_write_word_lowfirst:
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Mike Pavone <pavone@retrodev.com>
parents:
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168 call z_inccycles
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parents:
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169 push %r14
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parents:
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170 push %r13
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Mike Pavone <pavone@retrodev.com>
parents:
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171 call z80_write_byte_noinc
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Mike Pavone <pavone@retrodev.com>
parents:
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172 pop %r13
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parents:
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173 pop %r14
253
3b34deba4ca0 Squashing some bugs introduced when I switched the register assignments for z80_write_byte around.
Mike Pavone <pavone@retrodev.com>
parents: 252
diff changeset
174 add $1, %r14w
3b34deba4ca0 Squashing some bugs introduced when I switched the register assignments for z80_write_byte around.
Mike Pavone <pavone@retrodev.com>
parents: 252
diff changeset
175 shr $8, %r13w
249
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parents:
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176 call z_inccycles
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parents:
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177 call z80_write_byte_noinc
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parents:
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178 ret
252
63b9a500a00b Implement retranslating code when written to. Possibly broken, need to fix some other bugs before a proper test.
Mike Pavone <pavone@retrodev.com>
parents: 249
diff changeset
179
63b9a500a00b Implement retranslating code when written to. Possibly broken, need to fix some other bugs before a proper test.
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parents: 249
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180 .global z80_retrans_stub
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parents: 249
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181 z80_retrans_stub:
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parents: 249
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182 call z80_save_context
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parents: 249
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183 mov %r13d, %edi
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parents: 249
diff changeset
184 push %rsi
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parents: 249
diff changeset
185 call z80_retranslate_inst
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parents: 249
diff changeset
186 pop %rsi
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parents: 249
diff changeset
187 mov %rax, %r13
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parents: 249
diff changeset
188 call z80_load_context
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parents: 249
diff changeset
189 jmp *%r13
249
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parents:
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190
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parents:
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191 .global z80_native_addr
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parents:
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192 z80_native_addr:
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parents:
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193 call z80_save_context
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parents:
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194 push %rsi
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parents:
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195 mov %rsi, %rdi
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parents:
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196 movzx %r13w, %esi
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parents:
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197 call z80_get_native_address_trans
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parents:
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198 mov %rax, %r13
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Mike Pavone <pavone@retrodev.com>
parents:
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199 pop %rsi
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parents:
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200 call z80_load_context
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parents:
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201 ret
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
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202
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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parents:
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203 z80_save_context_scratch:
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Mike Pavone <pavone@retrodev.com>
parents:
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204 mov %r13w, 98(%rsi) /* scratch1 */
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parents:
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205 mov %r14w, 100(%rsi) /* scratch2 */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
206
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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parents:
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207 .global z80_save_context
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parents:
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208 z80_save_context:
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
209 mov %r9w, 8(%rsi) /* SP */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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parents:
diff changeset
210 mov %r15w, 16(%rsi) /* bank register */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
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parents:
diff changeset
211 mov %bx, 18(%rsi) /* BC */
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
212 mov %cx, 20(%rsi) /* DE */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
213 mov %ax, 22(%rsi) /* HL */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
214 mov %dx, 24(%rsi) /* IX */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
215 mov %r8w, 26(%rsi) /* IY */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
216 mov %r10b, 30(%rsi) /* A */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
217 mov %edi, 48(%rsi) /* target_cycle */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
218 mov %ebp, 52(%rsi) /* current_cycle */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
219 mov %r12, 72(%rsi) /* cartridge bank pointer */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
220 ret
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
221
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
222
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
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223 z80_load_context_scratch:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
224 mov 98(%rsi), %r13w /* scratch1 */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
225 mov 100(%rsi), %r14w /* scratch2 */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
226
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
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227 .global z80_load_context
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Mike Pavone <pavone@retrodev.com>
parents:
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228 z80_load_context:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
229 mov 8(%rsi), %r9w /* SP */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
230 mov 16(%rsi), %r15w /* bank register */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
231 mov 18(%rsi), %bx /* BC */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
232 mov 20(%rsi), %cx /* DE */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
233 mov 22(%rsi), %ax /* HL */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
234 mov 24(%rsi), %dx /* IX */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
235 mov 26(%rsi), %r8w /* IY */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
236 mov 30(%rsi), %r10b /* A */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
237 mov 48(%rsi), %edi /* target_cycle */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
238 mov 52(%rsi), %ebp /* current_cycle */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
239 mov 64(%rsi), %r11 /* z80 RAM */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
240 mov 72(%rsi), %r12 /* cartridge bank pointer */
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
241 ret
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
242
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
243 .global z80_run
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
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244 z80_run:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
245 push %rbx
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
246 push %rbp
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
247 push %r12
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
248 push %r13
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
249 push %r14
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
250 push %r15
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
251 mov %rdi, %rsi
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
252 call z80_load_context_scratch
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
253 cmpq $0, 104(%rsi)
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
254 je no_extra
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
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255 push 104(%rsi)
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
256 movq $0, 104(%rsi)
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
257 no_extra:
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
258 jmp *(%rsi)
d94e6cd5a8a5 Forgot to commit zruntime a while back, adding it now.
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
259