b1be1eee |
1 | /* |
2 | * (C) GraÅžvydas "notaz" Ignotas, 2011 |
3 | * |
4 | * This work is licensed under the terms of GNU GPL version 2 or later. |
5 | * See the COPYING file in the top-level directory. |
6 | */ |
7 | |
8 | static int pcsx_direct_read(int type, u_int addr, int cc_adj, int cc, int rs, int rt) |
9 | { |
10 | if ((addr & 0xfffff000) == 0x1f801000) { |
11 | u_int t; |
12 | switch (addr & 0xffff) { |
13 | case 0x1120: // rcnt2 count |
14 | if (rt < 0) goto dont_care; |
15 | if (cc < 0) return 0; |
16 | emit_readword((int)&rcnts[2].mode, HOST_TEMPREG); |
17 | emit_readword((int)&rcnts[2].cycleStart, rt); |
18 | emit_testimm(HOST_TEMPREG, 0x200); |
19 | emit_readword((int)&last_count, HOST_TEMPREG); |
20 | emit_sub(HOST_TEMPREG, rt, HOST_TEMPREG); |
21 | emit_add(HOST_TEMPREG, cc, HOST_TEMPREG); |
22 | if (cc_adj) |
23 | emit_addimm(HOST_TEMPREG, cc_adj, rt); |
24 | emit_shrne_imm(rt, 3, rt); |
25 | mov_loadtype_adj(type!=LOADW_STUB?type:LOADH_STUB, rt, rt); |
26 | goto hit; |
27 | case 0x1104: |
28 | case 0x1114: |
29 | case 0x1124: // rcnt mode |
30 | if (rt < 0) return 0; |
31 | t = (addr >> 4) & 3; |
32 | emit_readword((int)&rcnts[t].mode, rt); |
33 | emit_andimm(rt, ~0x1800, HOST_TEMPREG); |
34 | emit_writeword(HOST_TEMPREG, (int)&rcnts[t].mode); |
35 | mov_loadtype_adj(type, rt, rt); |
36 | goto hit; |
37 | } |
38 | } |
39 | else { |
40 | if (rt < 0) |
41 | goto dont_care; |
42 | } |
43 | |
44 | return 0; |
45 | |
46 | hit: |
47 | assem_debug("pcsx_direct_read %08x end\n", addr); |
48 | return 1; |
49 | |
50 | dont_care: |
51 | assem_debug("pcsx_direct_read %08x dummy\n", addr); |
52 | return 1; |
53 | } |
54 | |
55 | // vim:shiftwidth=2:expandtab |