| 1 | #define EMIT(x) *tcache_ptr++ = x |
| 2 | |
| 3 | #define A_R4M (1 << 4) |
| 4 | #define A_R5M (1 << 5) |
| 5 | #define A_R6M (1 << 6) |
| 6 | #define A_R7M (1 << 7) |
| 7 | #define A_R8M (1 << 8) |
| 8 | #define A_R9M (1 << 9) |
| 9 | #define A_R10M (1 << 10) |
| 10 | #define A_R11M (1 << 11) |
| 11 | #define A_R14M (1 << 14) |
| 12 | |
| 13 | #define A_COND_AL 0xe |
| 14 | |
| 15 | /* addressing mode 1 */ |
| 16 | #define A_AM1_LSL 0 |
| 17 | #define A_AM1_LSR 1 |
| 18 | #define A_AM1_ASR 2 |
| 19 | #define A_AM1_ROR 3 |
| 20 | |
| 21 | #define A_AM1_IMM(ror2,imm8) (((ror2)<<8) | (imm8) | 0x02000000) |
| 22 | #define A_AM1_REG_XIMM(shift_imm,shift_op,rm) (((shift_imm)<<7) | ((shift_op)<<5) | (rm)) |
| 23 | |
| 24 | /* data processing op */ |
| 25 | #define A_OP_ORR 0xc |
| 26 | #define A_OP_MOV 0xd |
| 27 | |
| 28 | #define EOP_C_DOP_X(cond,op,s,rn,rd,shifter_op) \ |
| 29 | EMIT(((cond)<<28) | ((op)<< 21) | ((s)<<20) | ((rn)<<16) | ((rd)<<12) | (shifter_op)) |
| 30 | |
| 31 | #define EOP_C_DOP_IMM(cond,op,s,rn,rd,ror2,imm8) EOP_C_DOP_X(cond,op,s,rn,rd,A_AM1_IMM(ror2,imm8)) |
| 32 | #define EOP_C_DOP_REG(cond,op,s,rn,rd,shift_imm,shift_op,rm) EOP_C_DOP_X(cond,op,s,rn,rd,A_AM1_REG_XIMM(shift_imm,shift_op,rm)) |
| 33 | |
| 34 | #define EOP_MOV_IMM(s, rd,ror2,imm8) EOP_C_DOP_IMM(A_COND_AL,A_OP_MOV,s, 0,rd,ror2,imm8) |
| 35 | #define EOP_ORR_IMM(s,rn,rd,ror2,imm8) EOP_C_DOP_IMM(A_COND_AL,A_OP_ORR,s,rn,rd,ror2,imm8) |
| 36 | |
| 37 | #define EOP_MOV_REG(s, rd,shift_imm,shift_op,rm) EOP_C_DOP_REG(A_COND_AL,A_OP_MOV,s, 0,rd,shift_imm,shift_op,rm) |
| 38 | |
| 39 | #define EOP_MOV_REG_SIMPLE(rd,rm) EOP_MOV_REG(0,rd,0,A_AM1_LSL,rm) |
| 40 | |
| 41 | /* ldr and str */ |
| 42 | #define EOP_C_XXR_IMM(cond,u,b,l,rn,rd,offset_12) \ |
| 43 | EMIT(((cond)<<28) | 0x05000000 | ((u)<<23) | ((b)<<22) | ((l)<<20) | ((rn)<<16) | ((rd)<<12) | (offset_12)) |
| 44 | |
| 45 | #define EOP_LDR_IMM( rd,rn,offset_12) EOP_C_XXR_IMM(A_COND_AL,1,0,1,rn,rd,offset_12) |
| 46 | #define EOP_LDR_NEGIMM(rd,rn,offset_12) EOP_C_XXR_IMM(A_COND_AL,0,0,1,rn,rd,offset_12) |
| 47 | #define EOP_LDR_SIMPLE(rd,rn) EOP_C_XXR_IMM(A_COND_AL,1,0,1,rn,rd,0) |
| 48 | #define EOP_STR_IMM( rd,rn,offset_12) EOP_C_XXR_IMM(A_COND_AL,1,0,0,rn,rd,offset_12) |
| 49 | #define EOP_STR_SIMPLE(rd,rn) EOP_C_XXR_IMM(A_COND_AL,1,0,0,rn,rd,0) |
| 50 | |
| 51 | /* ldm and stm */ |
| 52 | #define EOP_XXM(cond,p,u,s,w,l,rn,list) \ |
| 53 | EMIT(((cond)<<28) | (1<<27) | ((p)<<24) | ((u)<<23) | ((s)<<22) | ((w)<<21) | ((l)<<20) | ((rn)<<16) | (list)) |
| 54 | |
| 55 | #define EOP_STMFD_ST(list) EOP_XXM(A_COND_AL,1,0,0,1,0,13,list) |
| 56 | #define EOP_LDMFD_ST(list) EOP_XXM(A_COND_AL,0,1,0,1,1,13,list) |
| 57 | |
| 58 | /* branches */ |
| 59 | #define EOP_C_BX(cond,rm) \ |
| 60 | EMIT(((cond)<<28) | 0x012fff10 | (rm)) |
| 61 | |
| 62 | #define EOP_BX(rm) EOP_C_BX(A_COND_AL,rm) |
| 63 | |
| 64 | #define EOP_C_B(cond,l,signed_immed_24) \ |
| 65 | EMIT(((cond)<<28) | 0x0a000000 | ((l)<<24) | (signed_immed_24)) |
| 66 | |
| 67 | #define EOP_B( signed_immed_24) EOP_C_B(A_COND_AL,0,signed_immed_24) |
| 68 | #define EOP_BL(signed_immed_24) EOP_C_B(A_COND_AL,1,signed_immed_24) |
| 69 | |
| 70 | |
| 71 | static void emit_mov_const(int d, unsigned int val) |
| 72 | { |
| 73 | int need_or = 0; |
| 74 | if (val & 0xff000000) { |
| 75 | EOP_MOV_IMM(0, d, 8/2, (val>>24)&0xff); |
| 76 | need_or = 1; |
| 77 | } |
| 78 | if (val & 0x00ff0000) { |
| 79 | EOP_C_DOP_IMM(A_COND_AL,need_or ? A_OP_ORR : A_OP_MOV, 0, need_or ? d : 0, d, 16/2, (val>>16)&0xff); |
| 80 | need_or = 1; |
| 81 | } |
| 82 | if (val & 0x0000ff00) { |
| 83 | EOP_C_DOP_IMM(A_COND_AL,need_or ? A_OP_ORR : A_OP_MOV, 0, need_or ? d : 0, d, 24/2, (val>>8)&0xff); |
| 84 | need_or = 1; |
| 85 | } |
| 86 | if ((val &0x000000ff) || !need_or) |
| 87 | EOP_C_DOP_IMM(A_COND_AL,need_or ? A_OP_ORR : A_OP_MOV, 0, need_or ? d : 0, d, 0, val&0xff); |
| 88 | } |
| 89 | |
| 90 | /* |
| 91 | static void check_offset_12(unsigned int val) |
| 92 | { |
| 93 | if (!(val & ~0xfff)) return; |
| 94 | printf("offset_12 overflow %04x\n", val); |
| 95 | exit(1); |
| 96 | } |
| 97 | */ |
| 98 | |
| 99 | static void check_offset_24(int val) |
| 100 | { |
| 101 | if (val >= (int)0xff000000 && val <= 0x00ffffff) return; |
| 102 | printf("offset_24 overflow %08x\n", val); |
| 103 | exit(1); |
| 104 | } |
| 105 | |
| 106 | static void emit_call(void *target) |
| 107 | { |
| 108 | int val = (unsigned int *)target - tcache_ptr - 2; |
| 109 | check_offset_24(val); |
| 110 | |
| 111 | EOP_BL(val & 0xffffff); // bl target |
| 112 | } |
| 113 | |
| 114 | static void emit_block_prologue(void) |
| 115 | { |
| 116 | // stack regs |
| 117 | EOP_STMFD_ST(A_R4M|A_R5M|A_R6M|A_R7M|A_R8M|A_R9M|A_R10M|A_R11M|A_R14M); // stmfd r13!, {r4-r11,lr} |
| 118 | emit_call(regfile_load); |
| 119 | } |
| 120 | |
| 121 | static void emit_block_epilogue(int icount) |
| 122 | { |
| 123 | emit_call(regfile_store); |
| 124 | EOP_LDMFD_ST(A_R4M|A_R5M|A_R6M|A_R7M|A_R8M|A_R9M|A_R10M|A_R11M|A_R14M); // ldmfd r13!, {r4-r11,lr} |
| 125 | emit_mov_const(0, icount); |
| 126 | EOP_BX(14); // bx r14 |
| 127 | } |
| 128 | |
| 129 | static void emit_pc_dump(int pc) |
| 130 | { |
| 131 | emit_mov_const(3, pc<<16); |
| 132 | EOP_STR_IMM(3,7,0x400+6*4); // str r3, [r7, #(0x400+6*8)] |
| 133 | } |
| 134 | |
| 135 | static void emit_interpreter_call(void *target) |
| 136 | { |
| 137 | emit_call(regfile_store); |
| 138 | emit_call(target); |
| 139 | emit_call(regfile_load); |
| 140 | } |
| 141 | |
| 142 | static void handle_caches() |
| 143 | { |
| 144 | #ifdef ARM |
| 145 | extern void flush_inval_caches(const void *start_addr, const void *end_addr); |
| 146 | flush_inval_caches(tcache, tcache_ptr); |
| 147 | #else |
| 148 | #error wth |
| 149 | #endif |
| 150 | } |
| 151 | |
| 152 | |