| 1 | |
| 2 | |
| 3 | #define OLD_REGISTER_OFFSET (19*4) |
| 4 | #define SP_SIZE (OLD_REGISTER_OFFSET+4+8) |
| 5 | |
| 6 | /*asm void recRun(register void (*func)(), register u32 hw1, register u32 hw2)*/ |
| 7 | .text |
| 8 | .align 4 |
| 9 | .globl recRun |
| 10 | recRun: |
| 11 | /* prologue code */ |
| 12 | mflr r0 |
| 13 | stmw r13, -(32-13)*4(r1) |
| 14 | stw r0, 4(r1) |
| 15 | stwu r1, -((32-13)*4+8)(r1) |
| 16 | |
| 17 | /* execute code */ |
| 18 | mtctr r3 |
| 19 | mr r31, r4 |
| 20 | mr r30, r5 |
| 21 | bctrl |
| 22 | /* |
| 23 | } |
| 24 | asm void returnPC() |
| 25 | {*/ |
| 26 | .text |
| 27 | .align 4 |
| 28 | .globl returnPC |
| 29 | returnPC: |
| 30 | // end code |
| 31 | lwz r0, (32-13)*4+8+4(r1) |
| 32 | addi r1, r1, (32-13)*4+8 |
| 33 | mtlr r0 |
| 34 | lmw r13, -(32-13)*4(r1) |
| 35 | blr |
| 36 | //}*/ |
| 37 | |
| 38 | // Memory functions that only works with a linear memory |
| 39 | |
| 40 | .text |
| 41 | .align 4 |
| 42 | .globl dynMemRead8 |
| 43 | dynMemRead8: |
| 44 | // assumes that memory pointer is in r30 |
| 45 | addis r2,r3,-0x1f80 |
| 46 | srwi. r4,r2,16 |
| 47 | bne+ .norm8 |
| 48 | cmplwi r2,0x1000 |
| 49 | blt- .norm8 |
| 50 | b psxHwRead8 |
| 51 | .norm8: |
| 52 | clrlwi r5,r3,3 |
| 53 | lbzx r3,r5,r30 |
| 54 | blr |
| 55 | |
| 56 | .text |
| 57 | .align 4 |
| 58 | .globl dynMemRead16 |
| 59 | dynMemRead16: |
| 60 | // assumes that memory pointer is in r30 |
| 61 | addis r2,r3,-0x1f80 |
| 62 | srwi. r4,r2,16 |
| 63 | bne+ .norm16 |
| 64 | cmplwi r2,0x1000 |
| 65 | blt- .norm16 |
| 66 | b psxHwRead16 |
| 67 | .norm16: |
| 68 | clrlwi r5,r3,3 |
| 69 | lhbrx r3,r5,r30 |
| 70 | blr |
| 71 | |
| 72 | .text |
| 73 | .align 4 |
| 74 | .globl dynMemRead32 |
| 75 | dynMemRead32: |
| 76 | // assumes that memory pointer is in r30 |
| 77 | addis r2,r3,-0x1f80 |
| 78 | srwi. r4,r2,16 |
| 79 | bne+ .norm32 |
| 80 | cmplwi r2,0x1000 |
| 81 | blt- .norm32 |
| 82 | b psxHwRead32 |
| 83 | .norm32: |
| 84 | clrlwi r5,r3,3 |
| 85 | lwbrx r3,r5,r30 |
| 86 | blr |
| 87 | |
| 88 | /* |
| 89 | N P Z |
| 90 | 0 0 0 X |
| 91 | - 0 0 1 X |
| 92 | 1 0 0 X |
| 93 | 1 0 1 X |
| 94 | |
| 95 | P | (!N & Z) |
| 96 | P | !(N | !Z) |
| 97 | */ |
| 98 | |
| 99 | .text |
| 100 | .align 4 |
| 101 | .globl dynMemWrite32 |
| 102 | dynMemWrite32: |
| 103 | // assumes that memory pointer is in r30 |
| 104 | addis r2,r3,-0x1f80 |
| 105 | srwi. r5,r2,16 |
| 106 | bne+ .normw32 |
| 107 | cmplwi r2,0x1000 |
| 108 | blt .normw32 |
| 109 | b psxHwWrite32 |
| 110 | .normw32: |
| 111 | mtcrf 0xFF, r3 |
| 112 | clrlwi r5,r3,3 |
| 113 | crandc 0, 2, 0 |
| 114 | cror 2, 1, 0 |
| 115 | bne+ .okw32 |
| 116 | // write test |
| 117 | li r2,0x0130 |
| 118 | addis r2,r2,0xfffe |
| 119 | cmplw r3,r2 |
| 120 | bnelr |
| 121 | .okw32: |
| 122 | stwbrx r4,r5,r30 |
| 123 | blr |
| 124 | |