Mercurial > repos > blastem

annotate runtime.S @ 75:108e587165c0

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Implement DMA (untested)
author Mike Pavone <pavone@retrodev.com>
date Fri, 21 Dec 2012 20:56:32 -0800
parents 7935cd64d5c8
children 6331ddec228f
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
2 .global handle_cycle_limit
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
3 handle_cycle_limit:
54
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
4 call m68k_save_context
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
5 mov %rsi, %rdi
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
6 call sync_components
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
7 mov %rax, %rsi
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
8 call m68k_load_context
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
9 ret
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
10
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
11 do_vdp_port_write:
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
12 call m68k_save_context
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
13 mov %rcx, %rdx
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
14 call vdp_port_write
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
15 mov %rax, %rsi
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
16 call m68k_load_context
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
17 ret
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
18
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
19 do_vdp_port_read:
57
bc3bc7a60c4e Code in runtime for checking for VDP reads was using the wrong register. This is now fixed.
Mike Pavone <pavone@retrodev.com>
parents: 54
diff changeset
20 mov %ecx, %edi
54
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
21 call m68k_save_context
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
22 call vdp_port_read
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
23 mov %rax, %rsi
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
24 call m68k_load_context
72
7935cd64d5c8 Implement word wide access to IO area
Mike Pavone <pavone@retrodev.com>
parents: 66
diff changeset
25 mov 128(%rsi), %cx
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
26 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
27
66
7a22a0e6c004 Gamepad support
Mike Pavone <pavone@retrodev.com>
parents: 64
diff changeset
28 do_io_write:
7a22a0e6c004 Gamepad support
Mike Pavone <pavone@retrodev.com>
parents: 64
diff changeset
29 call m68k_save_context
7a22a0e6c004 Gamepad support
Mike Pavone <pavone@retrodev.com>
parents: 64
diff changeset
30 and $0xFF, %edi
7a22a0e6c004 Gamepad support
Mike Pavone <pavone@retrodev.com>
parents: 64
diff changeset
31 mov %rcx, %rdx
7a22a0e6c004 Gamepad support
Mike Pavone <pavone@retrodev.com>
parents: 64
diff changeset
32 call io_write
7a22a0e6c004 Gamepad support
Mike Pavone <pavone@retrodev.com>
parents: 64
diff changeset
33 mov %rax, %rsi
7a22a0e6c004 Gamepad support
Mike Pavone <pavone@retrodev.com>
parents: 64
diff changeset
34 call m68k_load_context
7a22a0e6c004 Gamepad support
Mike Pavone <pavone@retrodev.com>
parents: 64
diff changeset
35 ret
7a22a0e6c004 Gamepad support
Mike Pavone <pavone@retrodev.com>
parents: 64
diff changeset
36 do_io_read:
7a22a0e6c004 Gamepad support
Mike Pavone <pavone@retrodev.com>
parents: 64
diff changeset
37 mov %ecx, %edi
7a22a0e6c004 Gamepad support
Mike Pavone <pavone@retrodev.com>
parents: 64
diff changeset
38 and $0xFF, %edi
7a22a0e6c004 Gamepad support
Mike Pavone <pavone@retrodev.com>
parents: 64
diff changeset
39 call m68k_save_context
7a22a0e6c004 Gamepad support
Mike Pavone <pavone@retrodev.com>
parents: 64
diff changeset
40 call io_read
7a22a0e6c004 Gamepad support
Mike Pavone <pavone@retrodev.com>
parents: 64
diff changeset
41 mov %rax, %rsi
7a22a0e6c004 Gamepad support
Mike Pavone <pavone@retrodev.com>
parents: 64
diff changeset
42 call m68k_load_context
72
7935cd64d5c8 Implement word wide access to IO area
Mike Pavone <pavone@retrodev.com>
parents: 66
diff changeset
43 mov 128(%rsi), %cl
66
7a22a0e6c004 Gamepad support
Mike Pavone <pavone@retrodev.com>
parents: 64
diff changeset
44 ret
7a22a0e6c004 Gamepad support
Mike Pavone <pavone@retrodev.com>
parents: 64
diff changeset
45
54
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
46 bad_access_msg:
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
47 .asciz "Program tried to access illegal 68K address %X\n"
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
48
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
49 .global m68k_write_word
57
bc3bc7a60c4e Code in runtime for checking for VDP reads was using the wrong register. This is now fixed.
Mike Pavone <pavone@retrodev.com>
parents: 54
diff changeset
50 .global try_fifo_write
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
51 m68k_write_word:
64
2b1a65f4b85d Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents: 59
diff changeset
52 call inccycles
18
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
53 and $0xFFFFFF, %rdi
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
54 cmp $0x400000, %edi
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
55 jle cart_w
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
56 cmp $0xE00000, %edi
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
57 jge workram_w
54
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
58 cmp $0xC00000, %edi
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
59 jge vdp_psg_w
64
2b1a65f4b85d Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents: 59
diff changeset
60 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
61 workram_w:
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
62 and $0xFFFF, %rdi
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
63 mov %cx, (%r9, %rdi)
64
2b1a65f4b85d Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents: 59
diff changeset
64 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
65 cart_w:
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
66 mov %cx, (%r8, %rdi)
64
2b1a65f4b85d Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents: 59
diff changeset
67 ret
54
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
68 vdp_psg_w:
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
69 test $0x2700E0, %edi
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
70 jnz crash
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
71 and $0x1F, %edi
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
72 cmp $4, %edi
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
73 jl try_fifo_write
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
74 jmp do_vdp_port_write
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
75 try_fifo_write:
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
76 push %rdx
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
77 push %rbx
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
78 /* fetch VDP context pointer from 68K context */
72
7935cd64d5c8 Implement word wide access to IO area
Mike Pavone <pavone@retrodev.com>
parents: 66
diff changeset
79 mov 120(%rsi), %rdx
54
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
80 /* get fifo_cur and compare it to fifo_end */
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
81 mov (%rdx), %rbx
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
82 cmp %rbx, 8(%rdx)
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
83 /* bail out if fifo is full */
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
84 je fifo_fallback
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
85 /* populate FIFO entry */
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
86 mov %cx, 4(%rbx) /* value */
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
87 movb $0, 6(%rbx) /* partial */
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
88 mov %eax, %ecx
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
89 shl $3, %ecx /* multiply by 68K cycle by 7 to get MCLK cycle */
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
90 sub %eax, %ecx
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
91 mov %ecx, (%rbx) /* cycle */
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
92 /* update fifo_cur and store back in 68K context */
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
93 add $8, %rbx
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
94 mov %rbx, (%rdx)
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
95 /* clear pending flag */
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
96 andb $0xEF, 19(%rdx)
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
97 pop %rbx
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
98 pop %rdx
64
2b1a65f4b85d Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents: 59
diff changeset
99 ret
54
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
100 fifo_fallback:
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
101 pop %rbx
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
102 pop %rdx
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
103 jmp do_vdp_port_write
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
104 crash:
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
105 mov %edi, %esi
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
106 lea bad_access_msg(%rip), %rdi
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
107 call printf
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
108 mov $1, %rdi
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
109 call exit
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
110
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
111 .global m68k_write_byte
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
112 m68k_write_byte:
64
2b1a65f4b85d Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents: 59
diff changeset
113 call inccycles
18
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
114 and $0xFFFFFF, %rdi
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
115 /* deal with byte swapping */
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
116 xor $1, %edi
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
117 cmp $0x400000, %edi
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
118 jle cart_wb
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
119 cmp $0xE00000, %edi
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
120 jge workram_wb
66
7a22a0e6c004 Gamepad support
Mike Pavone <pavone@retrodev.com>
parents: 64
diff changeset
121 cmp $0xC00000, %edi
7a22a0e6c004 Gamepad support
Mike Pavone <pavone@retrodev.com>
parents: 64
diff changeset
122 jge vdp_psg_wb
7a22a0e6c004 Gamepad support
Mike Pavone <pavone@retrodev.com>
parents: 64
diff changeset
123 cmp $0xA10000, %edi
7a22a0e6c004 Gamepad support
Mike Pavone <pavone@retrodev.com>
parents: 64
diff changeset
124 jl not_io_wb
7a22a0e6c004 Gamepad support
Mike Pavone <pavone@retrodev.com>
parents: 64
diff changeset
125 cmp $0xA10100, %edi
7a22a0e6c004 Gamepad support
Mike Pavone <pavone@retrodev.com>
parents: 64
diff changeset
126 jge not_io_wb
7a22a0e6c004 Gamepad support
Mike Pavone <pavone@retrodev.com>
parents: 64
diff changeset
127 jmp do_io_write
7a22a0e6c004 Gamepad support
Mike Pavone <pavone@retrodev.com>
parents: 64
diff changeset
128 not_io_wb:
64
2b1a65f4b85d Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents: 59
diff changeset
129 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
130 workram_wb:
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
131 and $0xFFFF, %rdi
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
132 mov %cl, (%r9, %rdi)
64
2b1a65f4b85d Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents: 59
diff changeset
133 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
134 cart_wb:
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
135 mov %cl, (%r8, %rdi)
64
2b1a65f4b85d Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents: 59
diff changeset
136 ret
66
7a22a0e6c004 Gamepad support
Mike Pavone <pavone@retrodev.com>
parents: 64
diff changeset
137 vdp_psg_wb:
7a22a0e6c004 Gamepad support
Mike Pavone <pavone@retrodev.com>
parents: 64
diff changeset
138 push %rdx
7a22a0e6c004 Gamepad support
Mike Pavone <pavone@retrodev.com>
parents: 64
diff changeset
139 mov %cl, %dl
7a22a0e6c004 Gamepad support
Mike Pavone <pavone@retrodev.com>
parents: 64
diff changeset
140 and $0xFF, %cx
7a22a0e6c004 Gamepad support
Mike Pavone <pavone@retrodev.com>
parents: 64
diff changeset
141 shl $8, %dx
7a22a0e6c004 Gamepad support
Mike Pavone <pavone@retrodev.com>
parents: 64
diff changeset
142 or %dx, %cx
7a22a0e6c004 Gamepad support
Mike Pavone <pavone@retrodev.com>
parents: 64
diff changeset
143 pop %rdx
7a22a0e6c004 Gamepad support
Mike Pavone <pavone@retrodev.com>
parents: 64
diff changeset
144 jmp vdp_psg_w
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
145
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
146 .global m68k_write_long_lowfirst
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
147 m68k_write_long_lowfirst:
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
148 push %rdi
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
149 add $2, %edi
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
150 call m68k_write_word
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
151 shr $16, %ecx
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
152 pop %rdi
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
153 jmp m68k_write_word
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
154
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
155 .global m68k_write_long_highfirst
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
156 m68k_write_long_highfirst:
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
157 push %rdi
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
158 push %rcx
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
159 shr $16, %ecx
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
160 call m68k_write_word
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
161 pop %rcx
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
162 pop %rdi
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
163 add $2, %rdi
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
164 jmp m68k_write_word
64
2b1a65f4b85d Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents: 59
diff changeset
165
2b1a65f4b85d Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents: 59
diff changeset
166 inccycles:
2b1a65f4b85d Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents: 59
diff changeset
167 cmp %rbp, %rax
2b1a65f4b85d Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents: 59
diff changeset
168 jge do_limit
2b1a65f4b85d Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents: 59
diff changeset
169 add $4, %rax
2b1a65f4b85d Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents: 59
diff changeset
170 ret
2b1a65f4b85d Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents: 59
diff changeset
171 do_limit:
2b1a65f4b85d Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents: 59
diff changeset
172 push %rcx
2b1a65f4b85d Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents: 59
diff changeset
173 push %rdi
2b1a65f4b85d Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents: 59
diff changeset
174 call handle_cycle_limit
2b1a65f4b85d Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents: 59
diff changeset
175 pop %rdi
2b1a65f4b85d Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents: 59
diff changeset
176 pop %rcx
2b1a65f4b85d Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents: 59
diff changeset
177 add $4, %rax
2b1a65f4b85d Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents: 59
diff changeset
178 ret
17
de0085d4ea40 Add asssembly runtime code stub
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
179
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
180 .global m68k_read_word_scratch1
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
181 m68k_read_word_scratch1:
64
2b1a65f4b85d Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents: 59
diff changeset
182 call inccycles
18
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
183 and $0xFFFFFF, %rcx
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
184 cmp $0x400000, %ecx
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
185 jle cart
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
186 cmp $0xE00000, %ecx
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
187 jge workram
57
bc3bc7a60c4e Code in runtime for checking for VDP reads was using the wrong register. This is now fixed.
Mike Pavone <pavone@retrodev.com>
parents: 54
diff changeset
188 cmp $0xC00000, %ecx
54
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
189 jge vdp_psg
72
7935cd64d5c8 Implement word wide access to IO area
Mike Pavone <pavone@retrodev.com>
parents: 66
diff changeset
190 cmp $0xA10000, %ecx
7935cd64d5c8 Implement word wide access to IO area
Mike Pavone <pavone@retrodev.com>
parents: 66
diff changeset
191 jl not_io
7935cd64d5c8 Implement word wide access to IO area
Mike Pavone <pavone@retrodev.com>
parents: 66
diff changeset
192 cmp $0xA10100, %ecx
7935cd64d5c8 Implement word wide access to IO area
Mike Pavone <pavone@retrodev.com>
parents: 66
diff changeset
193 jge not_io
7935cd64d5c8 Implement word wide access to IO area
Mike Pavone <pavone@retrodev.com>
parents: 66
diff changeset
194 call do_io_read
7935cd64d5c8 Implement word wide access to IO area
Mike Pavone <pavone@retrodev.com>
parents: 66
diff changeset
195 mov %cl, %dil
7935cd64d5c8 Implement word wide access to IO area
Mike Pavone <pavone@retrodev.com>
parents: 66
diff changeset
196 and $0xFF, %cx
7935cd64d5c8 Implement word wide access to IO area
Mike Pavone <pavone@retrodev.com>
parents: 66
diff changeset
197 shl $8, %di
7935cd64d5c8 Implement word wide access to IO area
Mike Pavone <pavone@retrodev.com>
parents: 66
diff changeset
198 or %di, %cx
7935cd64d5c8 Implement word wide access to IO area
Mike Pavone <pavone@retrodev.com>
parents: 66
diff changeset
199 ret
7935cd64d5c8 Implement word wide access to IO area
Mike Pavone <pavone@retrodev.com>
parents: 66
diff changeset
200 not_io:
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
201 xor %cx, %cx
54
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
202 dec %cx
64
2b1a65f4b85d Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents: 59
diff changeset
203 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
204 workram:
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
205 and $0xFFFF, %rcx
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
206 mov (%r9, %rcx), %cx
64
2b1a65f4b85d Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents: 59
diff changeset
207 ret
54
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
208 vdp_psg:
57
bc3bc7a60c4e Code in runtime for checking for VDP reads was using the wrong register. This is now fixed.
Mike Pavone <pavone@retrodev.com>
parents: 54
diff changeset
209 test $0x2700E0, %ecx
54
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
210 jnz crash
57
bc3bc7a60c4e Code in runtime for checking for VDP reads was using the wrong register. This is now fixed.
Mike Pavone <pavone@retrodev.com>
parents: 54
diff changeset
211 and $0x1F, %ecx
54
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
212 jmp do_vdp_port_read
18
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
213 cart:
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
214 mov (%r8, %rcx), %cx
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
215 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
216
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 .global m68k_read_long_scratch1
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
218 m68k_read_long_scratch1:
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
219 push %rcx
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
220 call m68k_read_word_scratch1
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
221 mov %cx, %di
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 pop %rcx
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
223 add $2, %ecx
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
224 call m68k_read_word_scratch1
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
225 and $0xFFFF, %ecx
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
226 shl $16, %edi
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
227 or %edi, %ecx
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
228 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
229
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
230 .global m68k_read_byte_scratch1
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
231 m68k_read_byte_scratch1:
64
2b1a65f4b85d Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents: 59
diff changeset
232 call inccycles
18
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
233 and $0xFFFFFF, %rcx
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
234 /* deal with byte swapping */
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
235 xor $1, %ecx
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
236 cmp $0x400000, %ecx
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
237 jle cart_b
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
238 cmp $0xE00000, %ecx
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
239 jge workram_b
66
7a22a0e6c004 Gamepad support
Mike Pavone <pavone@retrodev.com>
parents: 64
diff changeset
240 cmp $0xA10000, %ecx
7a22a0e6c004 Gamepad support
Mike Pavone <pavone@retrodev.com>
parents: 64
diff changeset
241 jl not_io_b
7a22a0e6c004 Gamepad support
Mike Pavone <pavone@retrodev.com>
parents: 64
diff changeset
242 cmp $0xA10100, %ecx
7a22a0e6c004 Gamepad support
Mike Pavone <pavone@retrodev.com>
parents: 64
diff changeset
243 jge not_io_b
7a22a0e6c004 Gamepad support
Mike Pavone <pavone@retrodev.com>
parents: 64
diff changeset
244 jmp do_io_read
7a22a0e6c004 Gamepad support
Mike Pavone <pavone@retrodev.com>
parents: 64
diff changeset
245 not_io_b:
18
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
246 xor %cl, %cl
54
3b79cbcf6846 Get Flavio's color bar demo kind of sort of working
Mike Pavone <pavone@retrodev.com>
parents: 53
diff changeset
247 dec %cl
64
2b1a65f4b85d Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents: 59
diff changeset
248 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
249 workram_b:
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
250 and $0xFFFF, %rcx
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
251 mov (%r9, %rcx), %cl
64
2b1a65f4b85d Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents: 59
diff changeset
252 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
253 cart_b:
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
254 mov (%r8, %rcx), %cl
64
2b1a65f4b85d Cleanup 68K timing code. Temporarily omment out fFPS counter as it was causing segfaults
Mike Pavone <pavone@retrodev.com>
parents: 59
diff changeset
255 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
256
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
257 ret_addr_msg:
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
258 .asciz "Program modified return address on stack: found %X, expected %X\n"
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
259
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
260 .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
261 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
262 lea ret_addr_msg(%rip), %rdi
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
263 mov %rcx, %rsi
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
264 mov 8(%rsp), %rdx
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
265 call printf
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
266 mov $1, %rdi
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
267 call exit
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
268
53
44e661913a51 Add preliminary support for JMP
Mike Pavone <pavone@retrodev.com>
parents: 18
diff changeset
269 dyn_addr_msg:
44e661913a51 Add preliminary support for JMP
Mike Pavone <pavone@retrodev.com>
parents: 18
diff changeset
270 .asciz "Program needs dynamically calculated native address\n"
44e661913a51 Add preliminary support for JMP
Mike Pavone <pavone@retrodev.com>
parents: 18
diff changeset
271
44e661913a51 Add preliminary support for JMP
Mike Pavone <pavone@retrodev.com>
parents: 18
diff changeset
272 .global m68k_native_addr
44e661913a51 Add preliminary support for JMP
Mike Pavone <pavone@retrodev.com>
parents: 18
diff changeset
273 m68k_native_addr:
44e661913a51 Add preliminary support for JMP
Mike Pavone <pavone@retrodev.com>
parents: 18
diff changeset
274 lea dyn_addr_msg(%rip), %rdi
44e661913a51 Add preliminary support for JMP
Mike Pavone <pavone@retrodev.com>
parents: 18
diff changeset
275 call puts
44e661913a51 Add preliminary support for JMP
Mike Pavone <pavone@retrodev.com>
parents: 18
diff changeset
276 mov $1, %rdi
44e661913a51 Add preliminary support for JMP
Mike Pavone <pavone@retrodev.com>
parents: 18
diff changeset
277 call exit
44e661913a51 Add preliminary support for JMP
Mike Pavone <pavone@retrodev.com>
parents: 18
diff changeset
278
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
279 .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
280 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
281 mov %bl, 1(%rsi) /* N Flag */
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
282 mov %bh, 2(%rsi) /* V flag */
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
283 mov %dl, 3(%rsi) /* Z 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
284 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
285 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
286 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
287 mov %r12d, 16(%rsi) /* d2 */
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
288 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
289 mov %r14d, 44(%rsi) /* a1 */
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
290 mov %r15d, 68(%rsi) /* a7 */
72
7935cd64d5c8 Implement word wide access to IO area
Mike Pavone <pavone@retrodev.com>
parents: 66
diff changeset
291 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
292 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
293
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
294 .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
295 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
296 mov 1(%rsi), %bl /* N Flag */
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
297 mov 2(%rsi), %bh /* V flag */
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
298 mov 3(%rsi), %dl /* Z 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
299 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
300 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
301 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
302 mov 16(%rsi), %r12d /* d2 */
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
303 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
304 mov 44(%rsi), %r14d /* a1 */
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
305 mov 68(%rsi), %r15d /* a7 */
72
7935cd64d5c8 Implement word wide access to IO area
Mike Pavone <pavone@retrodev.com>
parents: 66
diff changeset
306 mov 76(%rsi), %ebp /* target cycle count */
7935cd64d5c8 Implement word wide access to IO area
Mike Pavone <pavone@retrodev.com>
parents: 66
diff changeset
307 mov 80(%rsi), %eax /* current cycle count */
7935cd64d5c8 Implement word wide access to IO area
Mike Pavone <pavone@retrodev.com>
parents: 66
diff changeset
308 mov 88(%rsi), %r8d /* cartridge address */
7935cd64d5c8 Implement word wide access to IO area
Mike Pavone <pavone@retrodev.com>
parents: 66
diff changeset
309 mov 96(%rsi), %r9d /* work ram address */
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
310 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
311
3e7bfde7606e M68K to x86 translation works for a limited subset of instructions and addressing modes
Mike Pavone <pavone@retrodev.com>
parents: 17
diff changeset
312 .global m68k_start_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
313 m68k_start_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
314 call 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
315 jmp *%rdi