| 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 emit_ldr_type(int type, int offs, int rs, int rt) |
| 9 | { |
| 10 | switch(type) { |
| 11 | case LOADB_STUB: |
| 12 | emit_movsbl_indexed(offs,rs,rt); |
| 13 | break; |
| 14 | case LOADBU_STUB: |
| 15 | emit_movzbl_indexed(offs,rs,rt); |
| 16 | break; |
| 17 | case LOADH_STUB: |
| 18 | emit_movswl_indexed(offs,rs,rt); |
| 19 | break; |
| 20 | case LOADHU_STUB: |
| 21 | emit_movzwl_indexed(offs,rs,rt); |
| 22 | break; |
| 23 | case LOADW_STUB: |
| 24 | emit_readword_indexed(offs,rs,rt); |
| 25 | break; |
| 26 | default: |
| 27 | assert(0); |
| 28 | } |
| 29 | } |
| 30 | |
| 31 | static int emit_str_type(int type, int offs, int rs, int rt) |
| 32 | { |
| 33 | switch(type) { |
| 34 | case STOREB_STUB: |
| 35 | emit_writebyte_indexed(rt,offs,rs); |
| 36 | break; |
| 37 | case STOREH_STUB: |
| 38 | emit_writehword_indexed(rt,offs,rs); |
| 39 | break; |
| 40 | case STOREW_STUB: |
| 41 | emit_writeword_indexed(rt,offs,rs); |
| 42 | break; |
| 43 | default: |
| 44 | assert(0); |
| 45 | } |
| 46 | } |
| 47 | |
| 48 | static void convert_ram_addr(u_int a_rs, u_int a_rt, int rs, int rt) |
| 49 | { |
| 50 | if(rs<0) |
| 51 | emit_movimm(a_rt,rt); |
| 52 | else if((a_rs&~0x60000000)==a_rt) |
| 53 | emit_andimm(rs,~0x60000000,rt); |
| 54 | else if((a_rs&~0x00600000)==a_rt) |
| 55 | emit_andimm(rs,~0x00600000,rt); |
| 56 | else |
| 57 | emit_movimm(a_rt,rt); |
| 58 | } |
| 59 | |
| 60 | static int pcsx_direct_read(int type, u_int addr, int rs, int rt) |
| 61 | { |
| 62 | if((addr & 0x1f800000) == 0) { |
| 63 | assem_debug("pcsx_direct_read %08x ram\n",addr); |
| 64 | if(rt<0) |
| 65 | return 1; |
| 66 | u_int a=(addr&~0x60600000)|0x80000000; |
| 67 | convert_ram_addr(addr,a,rs,rt); |
| 68 | emit_ldr_type(type,0,rt,rt); |
| 69 | return 1; |
| 70 | } |
| 71 | if((addr & 0x1ff80000) == 0x1fc00000) { |
| 72 | assem_debug("pcsx_direct_read %08x bios\n",addr); |
| 73 | if(rt<0) |
| 74 | return 1; |
| 75 | emit_movimm((u_int)&psxR[addr&0x7ffff],rt); |
| 76 | emit_ldr_type(type,0,rt,rt); |
| 77 | return 1; |
| 78 | } |
| 79 | if((addr & 0xfffff000) == 0x1f800000) { |
| 80 | assem_debug("pcsx_direct_read %08x scratchpad\n",addr); |
| 81 | if(rt<0) |
| 82 | return 1; |
| 83 | if(type==LOADW_STUB||type==LOADBU_STUB||(addr&0xf00)==0) { |
| 84 | emit_readword((int)&psxH_ptr,rt); |
| 85 | emit_ldr_type(type,addr&0xfff,rt,rt); |
| 86 | } else { |
| 87 | emit_movimm((u_int)&psxH[addr&0xfff],rt); |
| 88 | emit_ldr_type(type,0,rt,rt); |
| 89 | } |
| 90 | return 1; |
| 91 | } |
| 92 | |
| 93 | assem_debug("pcsx_direct_read %08x miss\n",addr); |
| 94 | return 0; |
| 95 | } |
| 96 | |
| 97 | static int pcsx_direct_write(int type, u_int addr, int rs, int rt, signed char *regmap) |
| 98 | { |
| 99 | if((addr & 0x1f800000) == 0) { |
| 100 | assem_debug("pcsx_direct_write %08x ram\n",addr); |
| 101 | u_int a=(addr&~0x60600000)|0x80000000; |
| 102 | convert_ram_addr(addr,a,rs,HOST_TEMPREG); |
| 103 | emit_str_type(type,0,HOST_TEMPREG,rt); |
| 104 | |
| 105 | int ir=get_reg(regmap,INVCP); |
| 106 | assert(ir>=0); |
| 107 | emit_cmpmem_indexedsr12_reg(ir,HOST_TEMPREG,1); |
| 108 | emit_callne(invalidate_addr_reg[rs]); |
| 109 | return 1; |
| 110 | } |
| 111 | if((addr & 0xfffff000) == 0x1f800000) { |
| 112 | assem_debug("pcsx_direct_write %08x scratchpad\n",addr); |
| 113 | if(type==STOREW_STUB||type==STOREB_STUB||(addr&0xf00)==0) { |
| 114 | emit_readword((int)&psxH_ptr,HOST_TEMPREG); |
| 115 | emit_str_type(type,addr&0xfff,HOST_TEMPREG,rt); |
| 116 | } else { |
| 117 | emit_movimm((u_int)&psxH[addr&0xfff],HOST_TEMPREG); |
| 118 | emit_str_type(type,0,HOST_TEMPREG,rt); |
| 119 | } |
| 120 | return 1; |
| 121 | } |
| 122 | |
| 123 | assem_debug("pcsx_direct_write %08x miss\n",addr); |
| 124 | return 0; |
| 125 | } |
| 126 | |
| 127 | // vim:shiftwidth=2:expandtab |