| /* |
| * MIPS32 emulation for qemu: main translation routines. |
| * |
| * Copyright (c) 2004-2005 Jocelyn Mayer |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| |
| #include <stdarg.h> |
| #include <stdlib.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <inttypes.h> |
| |
| #include "cpu.h" |
| #include "exec-all.h" |
| #include "disas.h" |
| |
| //#define MIPS_DEBUG_DISAS |
| //#define MIPS_SINGLE_STEP |
| |
| #ifdef USE_DIRECT_JUMP |
| #define TBPARAM(x) |
| #else |
| #define TBPARAM(x) (long)(x) |
| #endif |
| |
| enum { |
| #define DEF(s, n, copy_size) INDEX_op_ ## s, |
| #include "opc.h" |
| #undef DEF |
| NB_OPS, |
| }; |
| |
| static uint16_t *gen_opc_ptr; |
| static uint32_t *gen_opparam_ptr; |
| |
| #include "gen-op.h" |
| |
| /* MIPS opcodes */ |
| #define EXT_SPECIAL 0x100 |
| #define EXT_SPECIAL2 0x200 |
| #define EXT_REGIMM 0x300 |
| #define EXT_CP0 0x400 |
| #define EXT_CP1 0x500 |
| #define EXT_CP2 0x600 |
| #define EXT_CP3 0x700 |
| |
| enum { |
| /* indirect opcode tables */ |
| OPC_SPECIAL = 0x00, |
| OPC_BREGIMM = 0x01, |
| OPC_CP0 = 0x10, |
| OPC_CP1 = 0x11, |
| OPC_CP2 = 0x12, |
| OPC_CP3 = 0x13, |
| OPC_SPECIAL2 = 0x1C, |
| /* arithmetic with immediate */ |
| OPC_ADDI = 0x08, |
| OPC_ADDIU = 0x09, |
| OPC_SLTI = 0x0A, |
| OPC_SLTIU = 0x0B, |
| OPC_ANDI = 0x0C, |
| OPC_ORI = 0x0D, |
| OPC_XORI = 0x0E, |
| OPC_LUI = 0x0F, |
| /* Jump and branches */ |
| OPC_J = 0x02, |
| OPC_JAL = 0x03, |
| OPC_BEQ = 0x04, /* Unconditional if rs = rt = 0 (B) */ |
| OPC_BEQL = 0x14, |
| OPC_BNE = 0x05, |
| OPC_BNEL = 0x15, |
| OPC_BLEZ = 0x06, |
| OPC_BLEZL = 0x16, |
| OPC_BGTZ = 0x07, |
| OPC_BGTZL = 0x17, |
| OPC_JALX = 0x1D, /* MIPS 16 only */ |
| /* Load and stores */ |
| OPC_LB = 0x20, |
| OPC_LH = 0x21, |
| OPC_LWL = 0x22, |
| OPC_LW = 0x23, |
| OPC_LBU = 0x24, |
| OPC_LHU = 0x25, |
| OPC_LWR = 0x26, |
| OPC_SB = 0x28, |
| OPC_SH = 0x29, |
| OPC_SWL = 0x2A, |
| OPC_SW = 0x2B, |
| OPC_SWR = 0x2E, |
| OPC_LL = 0x30, |
| OPC_SC = 0x38, |
| /* Floating point load/store */ |
| OPC_LWC1 = 0x31, |
| OPC_LWC2 = 0x32, |
| OPC_LDC1 = 0x35, |
| OPC_LDC2 = 0x36, |
| OPC_SWC1 = 0x39, |
| OPC_SWC2 = 0x3A, |
| OPC_SDC1 = 0x3D, |
| OPC_SDC2 = 0x3E, |
| /* Cache and prefetch */ |
| OPC_CACHE = 0x2F, |
| OPC_PREF = 0x33, |
| }; |
| |
| /* MIPS special opcodes */ |
| enum { |
| /* Shifts */ |
| OPC_SLL = 0x00 | EXT_SPECIAL, |
| /* NOP is SLL r0, r0, 0 */ |
| /* SSNOP is SLL r0, r0, 1 */ |
| OPC_SRL = 0x02 | EXT_SPECIAL, |
| OPC_SRA = 0x03 | EXT_SPECIAL, |
| OPC_SLLV = 0x04 | EXT_SPECIAL, |
| OPC_SRLV = 0x06 | EXT_SPECIAL, |
| OPC_SRAV = 0x07 | EXT_SPECIAL, |
| /* Multiplication / division */ |
| OPC_MULT = 0x18 | EXT_SPECIAL, |
| OPC_MULTU = 0x19 | EXT_SPECIAL, |
| OPC_DIV = 0x1A | EXT_SPECIAL, |
| OPC_DIVU = 0x1B | EXT_SPECIAL, |
| /* 2 registers arithmetic / logic */ |
| OPC_ADD = 0x20 | EXT_SPECIAL, |
| OPC_ADDU = 0x21 | EXT_SPECIAL, |
| OPC_SUB = 0x22 | EXT_SPECIAL, |
| OPC_SUBU = 0x23 | EXT_SPECIAL, |
| OPC_AND = 0x24 | EXT_SPECIAL, |
| OPC_OR = 0x25 | EXT_SPECIAL, |
| OPC_XOR = 0x26 | EXT_SPECIAL, |
| OPC_NOR = 0x27 | EXT_SPECIAL, |
| OPC_SLT = 0x2A | EXT_SPECIAL, |
| OPC_SLTU = 0x2B | EXT_SPECIAL, |
| /* Jumps */ |
| OPC_JR = 0x08 | EXT_SPECIAL, |
| OPC_JALR = 0x09 | EXT_SPECIAL, |
| /* Traps */ |
| OPC_TGE = 0x30 | EXT_SPECIAL, |
| OPC_TGEU = 0x31 | EXT_SPECIAL, |
| OPC_TLT = 0x32 | EXT_SPECIAL, |
| OPC_TLTU = 0x33 | EXT_SPECIAL, |
| OPC_TEQ = 0x34 | EXT_SPECIAL, |
| OPC_TNE = 0x36 | EXT_SPECIAL, |
| /* HI / LO registers load & stores */ |
| OPC_MFHI = 0x10 | EXT_SPECIAL, |
| OPC_MTHI = 0x11 | EXT_SPECIAL, |
| OPC_MFLO = 0x12 | EXT_SPECIAL, |
| OPC_MTLO = 0x13 | EXT_SPECIAL, |
| /* Conditional moves */ |
| OPC_MOVZ = 0x0A | EXT_SPECIAL, |
| OPC_MOVN = 0x0B | EXT_SPECIAL, |
| |
| OPC_MOVCI = 0x01 | EXT_SPECIAL, |
| |
| /* Special */ |
| OPC_PMON = 0x05 | EXT_SPECIAL, |
| OPC_SYSCALL = 0x0C | EXT_SPECIAL, |
| OPC_BREAK = 0x0D | EXT_SPECIAL, |
| OPC_SYNC = 0x0F | EXT_SPECIAL, |
| }; |
| |
| enum { |
| /* Mutiply & xxx operations */ |
| OPC_MADD = 0x00 | EXT_SPECIAL2, |
| OPC_MADDU = 0x01 | EXT_SPECIAL2, |
| OPC_MUL = 0x02 | EXT_SPECIAL2, |
| OPC_MSUB = 0x04 | EXT_SPECIAL2, |
| OPC_MSUBU = 0x05 | EXT_SPECIAL2, |
| /* Misc */ |
| OPC_CLZ = 0x20 | EXT_SPECIAL2, |
| OPC_CLO = 0x21 | EXT_SPECIAL2, |
| /* Special */ |
| OPC_SDBBP = 0x3F | EXT_SPECIAL2, |
| }; |
| |
| /* Branch REGIMM */ |
| enum { |
| OPC_BLTZ = 0x00 | EXT_REGIMM, |
| OPC_BLTZL = 0x02 | EXT_REGIMM, |
| OPC_BGEZ = 0x01 | EXT_REGIMM, |
| OPC_BGEZL = 0x03 | EXT_REGIMM, |
| OPC_BLTZAL = 0x10 | EXT_REGIMM, |
| OPC_BLTZALL = 0x12 | EXT_REGIMM, |
| OPC_BGEZAL = 0x11 | EXT_REGIMM, |
| OPC_BGEZALL = 0x13 | EXT_REGIMM, |
| OPC_TGEI = 0x08 | EXT_REGIMM, |
| OPC_TGEIU = 0x09 | EXT_REGIMM, |
| OPC_TLTI = 0x0A | EXT_REGIMM, |
| OPC_TLTIU = 0x0B | EXT_REGIMM, |
| OPC_TEQI = 0x0C | EXT_REGIMM, |
| OPC_TNEI = 0x0E | EXT_REGIMM, |
| }; |
| |
| enum { |
| /* Coprocessor 0 (MMU) */ |
| OPC_MFC0 = 0x00 | EXT_CP0, |
| OPC_MTC0 = 0x04 | EXT_CP0, |
| OPC_TLBR = 0x01 | EXT_CP0, |
| OPC_TLBWI = 0x02 | EXT_CP0, |
| OPC_TLBWR = 0x06 | EXT_CP0, |
| OPC_TLBP = 0x08 | EXT_CP0, |
| OPC_ERET = 0x18 | EXT_CP0, |
| OPC_DERET = 0x1F | EXT_CP0, |
| OPC_WAIT = 0x20 | EXT_CP0, |
| }; |
| |
| const unsigned char *regnames[] = |
| { "r0", "at", "v0", "v1", "a0", "a1", "a2", "a3", |
| "t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7", |
| "s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7", |
| "t8", "t9", "k0", "k1", "gp", "sp", "s8", "ra", }; |
| |
| /* Warning: no function for r0 register (hard wired to zero) */ |
| #define GEN32(func, NAME) \ |
| static GenOpFunc *NAME ## _table [32] = { \ |
| NULL, NAME ## 1, NAME ## 2, NAME ## 3, \ |
| NAME ## 4, NAME ## 5, NAME ## 6, NAME ## 7, \ |
| NAME ## 8, NAME ## 9, NAME ## 10, NAME ## 11, \ |
| NAME ## 12, NAME ## 13, NAME ## 14, NAME ## 15, \ |
| NAME ## 16, NAME ## 17, NAME ## 18, NAME ## 19, \ |
| NAME ## 20, NAME ## 21, NAME ## 22, NAME ## 23, \ |
| NAME ## 24, NAME ## 25, NAME ## 26, NAME ## 27, \ |
| NAME ## 28, NAME ## 29, NAME ## 30, NAME ## 31, \ |
| }; \ |
| static inline void func(int n) \ |
| { \ |
| NAME ## _table[n](); \ |
| } |
| |
| /* General purpose registers moves */ |
| GEN32(gen_op_load_gpr_T0, gen_op_load_gpr_T0_gpr); |
| GEN32(gen_op_load_gpr_T1, gen_op_load_gpr_T1_gpr); |
| GEN32(gen_op_load_gpr_T2, gen_op_load_gpr_T2_gpr); |
| |
| GEN32(gen_op_store_T0_gpr, gen_op_store_T0_gpr_gpr); |
| GEN32(gen_op_store_T1_gpr, gen_op_store_T1_gpr_gpr); |
| |
| typedef struct DisasContext { |
| struct TranslationBlock *tb; |
| target_ulong pc, saved_pc; |
| uint32_t opcode; |
| /* Routine used to access memory */ |
| int mem_idx; |
| uint32_t hflags, saved_hflags; |
| uint32_t CP0_Status; |
| int bstate; |
| target_ulong btarget; |
| } DisasContext; |
| |
| enum { |
| BS_NONE = 0, /* We go out of the TB without reaching a branch or an |
| * exception condition |
| */ |
| BS_STOP = 1, /* We want to stop translation for any reason */ |
| BS_BRANCH = 2, /* We reached a branch condition */ |
| BS_EXCP = 3, /* We reached an exception condition */ |
| }; |
| |
| #if defined MIPS_DEBUG_DISAS |
| #define MIPS_DEBUG(fmt, args...) \ |
| do { \ |
| if (loglevel & CPU_LOG_TB_IN_ASM) { \ |
| fprintf(logfile, "%08x: %08x " fmt "\n", \ |
| ctx->pc, ctx->opcode , ##args); \ |
| } \ |
| } while (0) |
| #else |
| #define MIPS_DEBUG(fmt, args...) do { } while(0) |
| #endif |
| |
| #define MIPS_INVAL(op) \ |
| do { \ |
| MIPS_DEBUG("Invalid %s %03x %03x %03x", op, ctx->opcode >> 26, \ |
| ctx->opcode & 0x3F, ((ctx->opcode >> 16) & 0x1F)); \ |
| } while (0) |
| |
| #define GEN_LOAD_REG_TN(Tn, Rn) \ |
| do { \ |
| if (Rn == 0) { \ |
| glue(gen_op_reset_, Tn)(); \ |
| } else { \ |
| glue(gen_op_load_gpr_, Tn)(Rn); \ |
| } \ |
| } while (0) |
| |
| #define GEN_LOAD_IMM_TN(Tn, Imm) \ |
| do { \ |
| if (Imm == 0) { \ |
| glue(gen_op_reset_, Tn)(); \ |
| } else { \ |
| glue(gen_op_set_, Tn)(Imm); \ |
| } \ |
| } while (0) |
| |
| #define GEN_STORE_TN_REG(Rn, Tn) \ |
| do { \ |
| if (Rn != 0) { \ |
| glue(glue(gen_op_store_, Tn),_gpr)(Rn); \ |
| } \ |
| } while (0) |
| |
| static inline void save_cpu_state (DisasContext *ctx, int do_save_pc) |
| { |
| #if defined MIPS_DEBUG_DISAS |
| if (loglevel & CPU_LOG_TB_IN_ASM) { |
| fprintf(logfile, "hflags %08x saved %08x\n", |
| ctx->hflags, ctx->saved_hflags); |
| } |
| #endif |
| if (do_save_pc && ctx->pc != ctx->saved_pc) { |
| gen_op_save_pc(ctx->pc); |
| ctx->saved_pc = ctx->pc; |
| } |
| if (ctx->hflags != ctx->saved_hflags) { |
| gen_op_save_state(ctx->hflags); |
| ctx->saved_hflags = ctx->hflags; |
| if (ctx->hflags & MIPS_HFLAG_BR) { |
| gen_op_save_breg_target(); |
| } else if (ctx->hflags & MIPS_HFLAG_B) { |
| gen_op_save_btarget(ctx->btarget); |
| } else if (ctx->hflags & MIPS_HFLAG_BMASK) { |
| gen_op_save_bcond(); |
| gen_op_save_btarget(ctx->btarget); |
| } |
| } |
| } |
| |
| static inline void generate_exception_err (DisasContext *ctx, int excp, int err) |
| { |
| #if defined MIPS_DEBUG_DISAS |
| if (loglevel & CPU_LOG_TB_IN_ASM) |
| fprintf(logfile, "%s: raise exception %d\n", __func__, excp); |
| #endif |
| save_cpu_state(ctx, 1); |
| if (err == 0) |
| gen_op_raise_exception(excp); |
| else |
| gen_op_raise_exception_err(excp, err); |
| ctx->bstate = BS_EXCP; |
| } |
| |
| static inline void generate_exception (DisasContext *ctx, int excp) |
| { |
| generate_exception_err (ctx, excp, 0); |
| } |
| |
| #if defined(CONFIG_USER_ONLY) |
| #define op_ldst(name) gen_op_##name##_raw() |
| #define OP_LD_TABLE(width) |
| #define OP_ST_TABLE(width) |
| #else |
| #define op_ldst(name) (*gen_op_##name[ctx->mem_idx])() |
| #define OP_LD_TABLE(width) \ |
| static GenOpFunc *gen_op_l##width[] = { \ |
| &gen_op_l##width##_user, \ |
| &gen_op_l##width##_kernel, \ |
| } |
| #define OP_ST_TABLE(width) \ |
| static GenOpFunc *gen_op_s##width[] = { \ |
| &gen_op_s##width##_user, \ |
| &gen_op_s##width##_kernel, \ |
| } |
| #endif |
| |
| #ifdef TARGET_MIPS64 |
| OP_LD_TABLE(d); |
| OP_LD_TABLE(dl); |
| OP_LD_TABLE(dr); |
| OP_ST_TABLE(d); |
| OP_ST_TABLE(dl); |
| OP_ST_TABLE(dr); |
| #endif |
| OP_LD_TABLE(w); |
| OP_LD_TABLE(wl); |
| OP_LD_TABLE(wr); |
| OP_ST_TABLE(w); |
| OP_ST_TABLE(wl); |
| OP_ST_TABLE(wr); |
| OP_LD_TABLE(h); |
| OP_LD_TABLE(hu); |
| OP_ST_TABLE(h); |
| OP_LD_TABLE(b); |
| OP_LD_TABLE(bu); |
| OP_ST_TABLE(b); |
| OP_LD_TABLE(l); |
| OP_ST_TABLE(c); |
| |
| /* Load and store */ |
| static void gen_ldst (DisasContext *ctx, uint16_t opc, int rt, |
| int base, int16_t offset) |
| { |
| const unsigned char *opn = "unk"; |
| |
| if (base == 0) { |
| GEN_LOAD_IMM_TN(T0, offset); |
| } else if (offset == 0) { |
| gen_op_load_gpr_T0(base); |
| } else { |
| gen_op_load_gpr_T0(base); |
| gen_op_set_T1(offset); |
| gen_op_add(); |
| } |
| /* Don't do NOP if destination is zero: we must perform the actual |
| * memory access |
| */ |
| switch (opc) { |
| #if defined(TARGET_MIPS64) |
| case OPC_LD: |
| #if defined (MIPS_HAS_UNALIGNED_LS) |
| case OPC_ULD: |
| #endif |
| op_ldst(ld); |
| GEN_STORE_TN_REG(rt, T0); |
| opn = "ld"; |
| break; |
| case OPC_SD: |
| #if defined (MIPS_HAS_UNALIGNED_LS) |
| case OPC_USD: |
| #endif |
| GEN_LOAD_REG_TN(T1, rt); |
| op_ldst(sd); |
| opn = "sd"; |
| break; |
| case OPC_LDL: |
| op_ldst(ldl); |
| GEN_STORE_TN_REG(rt, T0); |
| opn = "ldl"; |
| break; |
| case OPC_SDL: |
| GEN_LOAD_REG_TN(T1, rt); |
| op_ldst(sdl); |
| opn = "sdl"; |
| break; |
| case OPC_LDR: |
| op_ldst(ldr); |
| GEN_STORE_TN_REG(rt, T0); |
| opn = "ldr"; |
| break; |
| case OPC_SDR: |
| GEN_LOAD_REG_TN(T1, rt); |
| op_ldst(sdr); |
| opn = "sdr"; |
| break; |
| #endif |
| case OPC_LW: |
| #if defined (MIPS_HAS_UNALIGNED_LS) |
| case OPC_ULW: |
| #endif |
| op_ldst(lw); |
| GEN_STORE_TN_REG(rt, T0); |
| opn = "lw"; |
| break; |
| case OPC_SW: |
| #if defined (MIPS_HAS_UNALIGNED_LS) |
| case OPC_USW: |
| #endif |
| GEN_LOAD_REG_TN(T1, rt); |
| op_ldst(sw); |
| opn = "sw"; |
| break; |
| case OPC_LH: |
| #if defined (MIPS_HAS_UNALIGNED_LS) |
| case OPC_ULH: |
| #endif |
| op_ldst(lh); |
| GEN_STORE_TN_REG(rt, T0); |
| opn = "lh"; |
| break; |
| case OPC_SH: |
| #if defined (MIPS_HAS_UNALIGNED_LS) |
| case OPC_USH: |
| #endif |
| GEN_LOAD_REG_TN(T1, rt); |
| op_ldst(sh); |
| opn = "sh"; |
| break; |
| case OPC_LHU: |
| #if defined (MIPS_HAS_UNALIGNED_LS) |
| case OPC_ULHU: |
| #endif |
| op_ldst(lhu); |
| GEN_STORE_TN_REG(rt, T0); |
| opn = "lhu"; |
| break; |
| case OPC_LB: |
| op_ldst(lb); |
| GEN_STORE_TN_REG(rt, T0); |
| opn = "lb"; |
| break; |
| case OPC_SB: |
| GEN_LOAD_REG_TN(T1, rt); |
| op_ldst(sb); |
| opn = "sb"; |
| break; |
| case OPC_LBU: |
| op_ldst(lbu); |
| GEN_STORE_TN_REG(rt, T0); |
| opn = "lbu"; |
| break; |
| case OPC_LWL: |
| GEN_LOAD_REG_TN(T1, rt); |
| op_ldst(lwl); |
| GEN_STORE_TN_REG(rt, T0); |
| opn = "lwl"; |
| break; |
| case OPC_SWL: |
| GEN_LOAD_REG_TN(T1, rt); |
| op_ldst(swl); |
| opn = "swr"; |
| break; |
| case OPC_LWR: |
| GEN_LOAD_REG_TN(T1, rt); |
| op_ldst(lwr); |
| GEN_STORE_TN_REG(rt, T0); |
| opn = "lwr"; |
| break; |
| case OPC_SWR: |
| GEN_LOAD_REG_TN(T1, rt); |
| op_ldst(swr); |
| opn = "swr"; |
| break; |
| case OPC_LL: |
| op_ldst(ll); |
| GEN_STORE_TN_REG(rt, T0); |
| opn = "ll"; |
| break; |
| case OPC_SC: |
| GEN_LOAD_REG_TN(T1, rt); |
| op_ldst(sc); |
| GEN_STORE_TN_REG(rt, T0); |
| opn = "sc"; |
| break; |
| default: |
| MIPS_INVAL("load/store"); |
| generate_exception(ctx, EXCP_RI); |
| return; |
| } |
| MIPS_DEBUG("%s %s, %d(%s)", opn, regnames[rt], offset, regnames[base]); |
| } |
| |
| /* Arithmetic with immediate operand */ |
| static void gen_arith_imm (DisasContext *ctx, uint16_t opc, int rt, |
| int rs, int16_t imm) |
| { |
| uint32_t uimm; |
| const unsigned char *opn = "unk"; |
| |
| if (rt == 0 && opc != OPC_ADDI) { |
| /* if no destination, treat it as a NOP |
| * For addi, we must generate the overflow exception when needed. |
| */ |
| MIPS_DEBUG("NOP"); |
| return; |
| } |
| if (opc == OPC_ADDI || opc == OPC_ADDIU || |
| opc == OPC_SLTI || opc == OPC_SLTIU) |
| uimm = (int32_t)imm; /* Sign extent to 32 bits */ |
| else |
| uimm = (uint16_t)imm; |
| if (opc != OPC_LUI) { |
| GEN_LOAD_REG_TN(T0, rs); |
| GEN_LOAD_IMM_TN(T1, uimm); |
| } else { |
| uimm = uimm << 16; |
| GEN_LOAD_IMM_TN(T0, uimm); |
| } |
| switch (opc) { |
| case OPC_ADDI: |
| save_cpu_state(ctx, 1); |
| gen_op_addo(); |
| opn = "addi"; |
| break; |
| case OPC_ADDIU: |
| gen_op_add(); |
| opn = "addiu"; |
| break; |
| case OPC_SLTI: |
| gen_op_lt(); |
| opn = "slti"; |
| break; |
| case OPC_SLTIU: |
| gen_op_ltu(); |
| opn = "sltiu"; |
| break; |
| case OPC_ANDI: |
| gen_op_and(); |
| opn = "andi"; |
| break; |
| case OPC_ORI: |
| gen_op_or(); |
| opn = "ori"; |
| break; |
| case OPC_XORI: |
| gen_op_xor(); |
| opn = "xori"; |
| break; |
| case OPC_LUI: |
| opn = "lui"; |
| break; |
| case OPC_SLL: |
| gen_op_sll(); |
| opn = "sll"; |
| break; |
| case OPC_SRA: |
| gen_op_sra(); |
| opn = "sra"; |
| break; |
| case OPC_SRL: |
| gen_op_srl(); |
| opn = "srl"; |
| break; |
| default: |
| MIPS_INVAL("imm arith"); |
| generate_exception(ctx, EXCP_RI); |
| return; |
| } |
| GEN_STORE_TN_REG(rt, T0); |
| MIPS_DEBUG("%s %s, %s, %x", opn, regnames[rt], regnames[rs], uimm); |
| } |
| |
| /* Arithmetic */ |
| static void gen_arith (DisasContext *ctx, uint16_t opc, |
| int rd, int rs, int rt) |
| { |
| const unsigned char *opn = "unk"; |
| |
| if (rd == 0 && opc != OPC_ADD && opc != OPC_SUB) { |
| /* if no destination, treat it as a NOP |
| * For add & sub, we must generate the overflow exception when needed. |
| */ |
| MIPS_DEBUG("NOP"); |
| return; |
| } |
| GEN_LOAD_REG_TN(T0, rs); |
| GEN_LOAD_REG_TN(T1, rt); |
| switch (opc) { |
| case OPC_ADD: |
| save_cpu_state(ctx, 1); |
| gen_op_addo(); |
| opn = "add"; |
| break; |
| case OPC_ADDU: |
| gen_op_add(); |
| opn = "addu"; |
| break; |
| case OPC_SUB: |
| save_cpu_state(ctx, 1); |
| gen_op_subo(); |
| opn = "sub"; |
| break; |
| case OPC_SUBU: |
| gen_op_sub(); |
| opn = "subu"; |
| break; |
| case OPC_SLT: |
| gen_op_lt(); |
| opn = "slt"; |
| break; |
| case OPC_SLTU: |
| gen_op_ltu(); |
| opn = "sltu"; |
| break; |
| case OPC_AND: |
| gen_op_and(); |
| opn = "and"; |
| break; |
| case OPC_NOR: |
| gen_op_nor(); |
| opn = "nor"; |
| break; |
| case OPC_OR: |
| gen_op_or(); |
| opn = "or"; |
| break; |
| case OPC_XOR: |
| gen_op_xor(); |
| opn = "xor"; |
| break; |
| case OPC_MUL: |
| gen_op_mul(); |
| opn = "mul"; |
| break; |
| case OPC_MOVN: |
| gen_op_movn(rd); |
| opn = "movn"; |
| goto print; |
| case OPC_MOVZ: |
| gen_op_movz(rd); |
| opn = "movz"; |
| goto print; |
| case OPC_SLLV: |
| gen_op_sllv(); |
| opn = "sllv"; |
| break; |
| case OPC_SRAV: |
| gen_op_srav(); |
| opn = "srav"; |
| break; |
| case OPC_SRLV: |
| gen_op_srlv(); |
| opn = "srlv"; |
| break; |
| default: |
| MIPS_INVAL("arith"); |
| generate_exception(ctx, EXCP_RI); |
| return; |
| } |
| GEN_STORE_TN_REG(rd, T0); |
| print: |
| MIPS_DEBUG("%s %s, %s, %s", opn, regnames[rd], regnames[rs], regnames[rt]); |
| } |
| |
| /* Arithmetic on HI/LO registers */ |
| static void gen_HILO (DisasContext *ctx, uint16_t opc, int reg) |
| { |
| const unsigned char *opn = "unk"; |
| |
| if (reg == 0 && (opc == OPC_MFHI || opc == OPC_MFLO)) { |
| /* Treat as a NOP */ |
| MIPS_DEBUG("NOP"); |
| return; |
| } |
| switch (opc) { |
| case OPC_MFHI: |
| gen_op_load_HI(); |
| GEN_STORE_TN_REG(reg, T0); |
| opn = "mfhi"; |
| break; |
| case OPC_MFLO: |
| gen_op_load_LO(); |
| GEN_STORE_TN_REG(reg, T0); |
| opn = "mflo"; |
| break; |
| case OPC_MTHI: |
| GEN_LOAD_REG_TN(T0, reg); |
| gen_op_store_HI(); |
| opn = "mthi"; |
| break; |
| case OPC_MTLO: |
| GEN_LOAD_REG_TN(T0, reg); |
| gen_op_store_LO(); |
| opn = "mtlo"; |
| break; |
| default: |
| MIPS_INVAL("HILO"); |
| generate_exception(ctx, EXCP_RI); |
| return; |
| } |
| MIPS_DEBUG("%s %s", opn, regnames[reg]); |
| } |
| |
| static void gen_muldiv (DisasContext *ctx, uint16_t opc, |
| int rs, int rt) |
| { |
| const unsigned char *opn = "unk"; |
| |
| GEN_LOAD_REG_TN(T0, rs); |
| GEN_LOAD_REG_TN(T1, rt); |
| switch (opc) { |
| case OPC_DIV: |
| gen_op_div(); |
| opn = "div"; |
| break; |
| case OPC_DIVU: |
| gen_op_divu(); |
| opn = "divu"; |
| break; |
| case OPC_MULT: |
| gen_op_mult(); |
| opn = "mult"; |
| break; |
| case OPC_MULTU: |
| gen_op_multu(); |
| opn = "multu"; |
| break; |
| case OPC_MADD: |
| gen_op_madd(); |
| opn = "madd"; |
| break; |
| case OPC_MADDU: |
| gen_op_maddu(); |
| opn = "maddu"; |
| break; |
| case OPC_MSUB: |
| gen_op_msub(); |
| opn = "msub"; |
| break; |
| case OPC_MSUBU: |
| gen_op_msubu(); |
| opn = "msubu"; |
| break; |
| default: |
| MIPS_INVAL("mul/div"); |
| generate_exception(ctx, EXCP_RI); |
| return; |
| } |
| MIPS_DEBUG("%s %s %s", opn, regnames[rs], regnames[rt]); |
| } |
| |
| static void gen_cl (DisasContext *ctx, uint16_t opc, |
| int rd, int rs) |
| { |
| const unsigned char *opn = "unk"; |
| if (rd == 0) { |
| /* Treat as a NOP */ |
| MIPS_DEBUG("NOP"); |
| return; |
| } |
| GEN_LOAD_REG_TN(T0, rs); |
| switch (opc) { |
| case OPC_CLO: |
| /* CLO */ |
| gen_op_clo(); |
| opn = "clo"; |
| break; |
| case OPC_CLZ: |
| /* CLZ */ |
| gen_op_clz(); |
| opn = "clz"; |
| break; |
| default: |
| MIPS_INVAL("CLx"); |
| generate_exception(ctx, EXCP_RI); |
| return; |
| } |
| gen_op_store_T0_gpr(rd); |
| MIPS_DEBUG("%s %s, %s", opn, regnames[rd], regnames[rs]); |
| } |
| |
| /* Traps */ |
| static void gen_trap (DisasContext *ctx, uint16_t opc, |
| int rs, int rt, int16_t imm) |
| { |
| int cond; |
| |
| cond = 0; |
| /* Load needed operands */ |
| switch (opc) { |
| case OPC_TEQ: |
| case OPC_TGE: |
| case OPC_TGEU: |
| case OPC_TLT: |
| case OPC_TLTU: |
| case OPC_TNE: |
| /* Compare two registers */ |
| if (rs != rt) { |
| GEN_LOAD_REG_TN(T0, rs); |
| GEN_LOAD_REG_TN(T1, rt); |
| cond = 1; |
| } |
| case OPC_TEQI: |
| case OPC_TGEI: |
| case OPC_TGEIU: |
| case OPC_TLTI: |
| case OPC_TLTIU: |
| case OPC_TNEI: |
| /* Compare register to immediate */ |
| if (rs != 0 || imm != 0) { |
| GEN_LOAD_REG_TN(T0, rs); |
| GEN_LOAD_IMM_TN(T1, (int32_t)imm); |
| cond = 1; |
| } |
| break; |
| } |
| if (cond == 0) { |
| switch (opc) { |
| case OPC_TEQ: /* rs == rs */ |
| case OPC_TEQI: /* r0 == 0 */ |
| case OPC_TGE: /* rs >= rs */ |
| case OPC_TGEI: /* r0 >= 0 */ |
| case OPC_TGEU: /* rs >= rs unsigned */ |
| case OPC_TGEIU: /* r0 >= 0 unsigned */ |
| /* Always trap */ |
| gen_op_set_T0(1); |
| break; |
| case OPC_TLT: /* rs < rs */ |
| case OPC_TLTI: /* r0 < 0 */ |
| case OPC_TLTU: /* rs < rs unsigned */ |
| case OPC_TLTIU: /* r0 < 0 unsigned */ |
| case OPC_TNE: /* rs != rs */ |
| case OPC_TNEI: /* r0 != 0 */ |
| /* Never trap: treat as NOP */ |
| return; |
| default: |
| MIPS_INVAL("TRAP"); |
| generate_exception(ctx, EXCP_RI); |
| return; |
| } |
| } else { |
| switch (opc) { |
| case OPC_TEQ: |
| case OPC_TEQI: |
| gen_op_eq(); |
| break; |
| case OPC_TGE: |
| case OPC_TGEI: |
| gen_op_ge(); |
| break; |
| case OPC_TGEU: |
| case OPC_TGEIU: |
| gen_op_geu(); |
| break; |
| case OPC_TLT: |
| case OPC_TLTI: |
| gen_op_lt(); |
| break; |
| case OPC_TLTU: |
| case OPC_TLTIU: |
| gen_op_ltu(); |
| break; |
| case OPC_TNE: |
| case OPC_TNEI: |
| gen_op_ne(); |
| break; |
| default: |
| MIPS_INVAL("TRAP"); |
| generate_exception(ctx, EXCP_RI); |
| return; |
| } |
| } |
| save_cpu_state(ctx, 1); |
| gen_op_trap(); |
| ctx->bstate = BS_STOP; |
| } |
| |
| static inline void gen_goto_tb(DisasContext *ctx, int n, target_ulong dest) |
| { |
| TranslationBlock *tb; |
| tb = ctx->tb; |
| if ((tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK)) { |
| if (n == 0) |
| gen_op_goto_tb0(TBPARAM(tb)); |
| else |
| gen_op_goto_tb1(TBPARAM(tb)); |
| gen_op_save_pc(dest); |
| gen_op_set_T0((long)tb + n); |
| gen_op_exit_tb(); |
| } else { |
| gen_op_save_pc(dest); |
| gen_op_set_T0(0); |
| gen_op_exit_tb(); |
| } |
| } |
| |
| /* Branches (before delay slot) */ |
| static void gen_compute_branch (DisasContext *ctx, uint16_t opc, |
| int rs, int rt, int32_t offset) |
| { |
| target_ulong btarget; |
| int blink, bcond; |
| |
| btarget = -1; |
| blink = 0; |
| bcond = 0; |
| /* Load needed operands */ |
| switch (opc) { |
| case OPC_BEQ: |
| case OPC_BEQL: |
| case OPC_BNE: |
| case OPC_BNEL: |
| /* Compare two registers */ |
| if (rs != rt) { |
| GEN_LOAD_REG_TN(T0, rs); |
| GEN_LOAD_REG_TN(T1, rt); |
| bcond = 1; |
| } |
| btarget = ctx->pc + 4 + offset; |
| break; |
| case OPC_BGEZ: |
| case OPC_BGEZAL: |
| case OPC_BGEZALL: |
| case OPC_BGEZL: |
| case OPC_BGTZ: |
| case OPC_BGTZL: |
| case OPC_BLEZ: |
| case OPC_BLEZL: |
| case OPC_BLTZ: |
| case OPC_BLTZAL: |
| case OPC_BLTZALL: |
| case OPC_BLTZL: |
| /* Compare to zero */ |
| if (rs != 0) { |
| gen_op_load_gpr_T0(rs); |
| bcond = 1; |
| } |
| btarget = ctx->pc + 4 + offset; |
| break; |
| case OPC_J: |
| case OPC_JAL: |
| /* Jump to immediate */ |
| btarget = ((ctx->pc + 4) & 0xF0000000) | offset; |
| break; |
| case OPC_JR: |
| case OPC_JALR: |
| /* Jump to register */ |
| if (offset != 0) { |
| /* Only hint = 0 is valid */ |
| generate_exception(ctx, EXCP_RI); |
| return; |
| } |
| GEN_LOAD_REG_TN(T2, rs); |
| break; |
| default: |
| MIPS_INVAL("branch/jump"); |
| generate_exception(ctx, EXCP_RI); |
| return; |
| } |
| if (bcond == 0) { |
| /* No condition to be computed */ |
| switch (opc) { |
| case OPC_BEQ: /* rx == rx */ |
| case OPC_BEQL: /* rx == rx likely */ |
| case OPC_BGEZ: /* 0 >= 0 */ |
| case OPC_BGEZL: /* 0 >= 0 likely */ |
| case OPC_BLEZ: /* 0 <= 0 */ |
| case OPC_BLEZL: /* 0 <= 0 likely */ |
| /* Always take */ |
| ctx->hflags |= MIPS_HFLAG_B; |
| MIPS_DEBUG("balways"); |
| break; |
| case OPC_BGEZAL: /* 0 >= 0 */ |
| case OPC_BGEZALL: /* 0 >= 0 likely */ |
| /* Always take and link */ |
| blink = 31; |
| ctx->hflags |= MIPS_HFLAG_B; |
| MIPS_DEBUG("balways and link"); |
| break; |
| case OPC_BNE: /* rx != rx */ |
| case OPC_BGTZ: /* 0 > 0 */ |
| case OPC_BLTZ: /* 0 < 0 */ |
| /* Treated as NOP */ |
| MIPS_DEBUG("bnever (NOP)"); |
| return; |
| case OPC_BLTZAL: /* 0 < 0 */ |
| gen_op_set_T0(ctx->pc + 8); |
| gen_op_store_T0_gpr(31); |
| return; |
| case OPC_BLTZALL: /* 0 < 0 likely */ |
| gen_op_set_T0(ctx->pc + 8); |
| gen_op_store_T0_gpr(31); |
| gen_goto_tb(ctx, 0, ctx->pc + 4); |
| return; |
| case OPC_BNEL: /* rx != rx likely */ |
| case OPC_BGTZL: /* 0 > 0 likely */ |
| case OPC_BLTZL: /* 0 < 0 likely */ |
| /* Skip the instruction in the delay slot */ |
| MIPS_DEBUG("bnever and skip"); |
| gen_goto_tb(ctx, 0, ctx->pc + 4); |
| return; |
| case OPC_J: |
| ctx->hflags |= MIPS_HFLAG_B; |
| MIPS_DEBUG("j %08x", btarget); |
| break; |
| case OPC_JAL: |
| blink = 31; |
| ctx->hflags |= MIPS_HFLAG_B; |
| MIPS_DEBUG("jal %08x", btarget); |
| break; |
| case OPC_JR: |
| ctx->hflags |= MIPS_HFLAG_BR; |
| MIPS_DEBUG("jr %s", regnames[rs]); |
| break; |
| case OPC_JALR: |
| blink = rt; |
| ctx->hflags |= MIPS_HFLAG_BR; |
| MIPS_DEBUG("jalr %s, %s", regnames[rt], regnames[rs]); |
| break; |
| default: |
| MIPS_INVAL("branch/jump"); |
| generate_exception(ctx, EXCP_RI); |
| return; |
| } |
| } else { |
| switch (opc) { |
| case OPC_BEQ: |
| gen_op_eq(); |
| MIPS_DEBUG("beq %s, %s, %08x", |
| regnames[rs], regnames[rt], btarget); |
| goto not_likely; |
| case OPC_BEQL: |
| gen_op_eq(); |
| MIPS_DEBUG("beql %s, %s, %08x", |
| regnames[rs], regnames[rt], btarget); |
| goto likely; |
| case OPC_BNE: |
| gen_op_ne(); |
| MIPS_DEBUG("bne %s, %s, %08x", |
| regnames[rs], regnames[rt], btarget); |
| goto not_likely; |
| case OPC_BNEL: |
| gen_op_ne(); |
| MIPS_DEBUG("bnel %s, %s, %08x", |
| regnames[rs], regnames[rt], btarget); |
| goto likely; |
| case OPC_BGEZ: |
| gen_op_gez(); |
| MIPS_DEBUG("bgez %s, %08x", regnames[rs], btarget); |
| goto not_likely; |
| case OPC_BGEZL: |
| gen_op_gez(); |
| MIPS_DEBUG("bgezl %s, %08x", regnames[rs], btarget); |
| goto likely; |
| case OPC_BGEZAL: |
| gen_op_gez(); |
| MIPS_DEBUG("bgezal %s, %08x", regnames[rs], btarget); |
| blink = 31; |
| goto not_likely; |
| case OPC_BGEZALL: |
| gen_op_gez(); |
| blink = 31; |
| MIPS_DEBUG("bgezall %s, %08x", regnames[rs], btarget); |
| goto likely; |
| case OPC_BGTZ: |
| gen_op_gtz(); |
| MIPS_DEBUG("bgtz %s, %08x", regnames[rs], btarget); |
| goto not_likely; |
| case OPC_BGTZL: |
| gen_op_gtz(); |
| MIPS_DEBUG("bgtzl %s, %08x", regnames[rs], btarget); |
| goto likely; |
| case OPC_BLEZ: |
| gen_op_lez(); |
| MIPS_DEBUG("blez %s, %08x", regnames[rs], btarget); |
| goto not_likely; |
| case OPC_BLEZL: |
| gen_op_lez(); |
| MIPS_DEBUG("blezl %s, %08x", regnames[rs], btarget); |
| goto likely; |
| case OPC_BLTZ: |
| gen_op_ltz(); |
| MIPS_DEBUG("bltz %s, %08x", regnames[rs], btarget); |
| goto not_likely; |
| case OPC_BLTZL: |
| gen_op_ltz(); |
| MIPS_DEBUG("bltzl %s, %08x", regnames[rs], btarget); |
| goto likely; |
| case OPC_BLTZAL: |
| gen_op_ltz(); |
| blink = 31; |
| MIPS_DEBUG("bltzal %s, %08x", regnames[rs], btarget); |
| not_likely: |
| ctx->hflags |= MIPS_HFLAG_BC; |
| break; |
| case OPC_BLTZALL: |
| gen_op_ltz(); |
| blink = 31; |
| MIPS_DEBUG("bltzall %s, %08x", regnames[rs], btarget); |
| likely: |
| ctx->hflags |= MIPS_HFLAG_BL; |
| break; |
| } |
| gen_op_set_bcond(); |
| } |
| MIPS_DEBUG("enter ds: link %d cond %02x target %08x", |
| blink, ctx->hflags, btarget); |
| ctx->btarget = btarget; |
| if (blink > 0) { |
| gen_op_set_T0(ctx->pc + 8); |
| gen_op_store_T0_gpr(blink); |
| } |
| return; |
| } |
| |
| /* CP0 (MMU and control) */ |
| static void gen_cp0 (DisasContext *ctx, uint16_t opc, int rt, int rd) |
| { |
| const unsigned char *opn = "unk"; |
| |
| if (!(ctx->CP0_Status & (1 << CP0St_CU0)) && |
| !(ctx->hflags & MIPS_HFLAG_UM) && |
| !(ctx->hflags & MIPS_HFLAG_ERL) && |
| !(ctx->hflags & MIPS_HFLAG_EXL)) { |
| if (loglevel & CPU_LOG_TB_IN_ASM) { |
| fprintf(logfile, "CP0 is not usable\n"); |
| } |
| generate_exception_err (ctx, EXCP_CpU, 0); |
| return; |
| } |
| switch (opc) { |
| case OPC_MFC0: |
| if (rt == 0) { |
| /* Treat as NOP */ |
| return; |
| } |
| gen_op_mfc0(rd, ctx->opcode & 0x7); |
| gen_op_store_T0_gpr(rt); |
| opn = "mfc0"; |
| break; |
| case OPC_MTC0: |
| /* If we get an exception, we want to restart at next instruction */ |
| ctx->pc += 4; |
| save_cpu_state(ctx, 1); |
| ctx->pc -= 4; |
| GEN_LOAD_REG_TN(T0, rt); |
| gen_op_mtc0(rd, ctx->opcode & 0x7); |
| /* Stop translation as we may have switched the execution mode */ |
| ctx->bstate = BS_STOP; |
| opn = "mtc0"; |
| break; |
| #if defined(MIPS_USES_R4K_TLB) |
| case OPC_TLBWI: |
| gen_op_tlbwi(); |
| opn = "tlbwi"; |
| break; |
| case OPC_TLBWR: |
| gen_op_tlbwr(); |
| opn = "tlbwr"; |
| break; |
| case OPC_TLBP: |
| gen_op_tlbp(); |
| opn = "tlbp"; |
| break; |
| case OPC_TLBR: |
| gen_op_tlbr(); |
| opn = "tlbr"; |
| break; |
| #endif |
| case OPC_ERET: |
| opn = "eret"; |
| save_cpu_state(ctx, 0); |
| gen_op_eret(); |
| ctx->bstate = BS_EXCP; |
| break; |
| case OPC_DERET: |
| opn = "deret"; |
| if (!(ctx->hflags & MIPS_HFLAG_DM)) { |
| generate_exception(ctx, EXCP_RI); |
| } else { |
| save_cpu_state(ctx, 0); |
| gen_op_deret(); |
| ctx->bstate = BS_EXCP; |
| } |
| break; |
| case OPC_WAIT: |
| opn = "wait"; |
| /* If we get an exception, we want to restart at next instruction */ |
| ctx->pc += 4; |
| save_cpu_state(ctx, 1); |
| ctx->pc -= 4; |
| gen_op_wait(); |
| ctx->bstate = BS_EXCP; |
| break; |
| default: |
| if (loglevel & CPU_LOG_TB_IN_ASM) { |
| fprintf(logfile, "Invalid CP0 opcode: %08x %03x %03x %03x\n", |
| ctx->opcode, ctx->opcode >> 26, ctx->opcode & 0x3F, |
| ((ctx->opcode >> 16) & 0x1F)); |
| } |
| generate_exception(ctx, EXCP_RI); |
| return; |
| } |
| MIPS_DEBUG("%s %s %d", opn, regnames[rt], rd); |
| } |
| |
| /* Coprocessor 1 (FPU) */ |
| |
| /* ISA extensions */ |
| /* MIPS16 extension to MIPS32 */ |
| /* SmartMIPS extension to MIPS32 */ |
| |
| #ifdef TARGET_MIPS64 |
| static void gen_arith64 (DisasContext *ctx, uint16_t opc) |
| { |
| if (func == 0x02 && rd == 0) { |
| /* NOP */ |
| return; |
| } |
| if (rs == 0 || rt == 0) { |
| gen_op_reset_T0(); |
| gen_op_save64(); |
| } else { |
| gen_op_load_gpr_T0(rs); |
| gen_op_load_gpr_T1(rt); |
| gen_op_save64(); |
| if (func & 0x01) |
| gen_op_mul64u(); |
| else |
| gen_op_mul64s(); |
| } |
| if (func & 0x02) |
| gen_op_add64(); |
| else |
| gen_op_sub64(); |
| } |
| |
| /* Coprocessor 3 (FPU) */ |
| |
| /* MDMX extension to MIPS64 */ |
| /* MIPS-3D extension to MIPS64 */ |
| |
| #endif |
| |
| static void gen_blikely(DisasContext *ctx) |
| { |
| int l1; |
| l1 = gen_new_label(); |
| gen_op_jnz_T2(l1); |
| gen_op_save_state(ctx->hflags & ~MIPS_HFLAG_BMASK); |
| gen_goto_tb(ctx, 1, ctx->pc + 4); |
| gen_set_label(l1); |
| } |
| |
| static void decode_opc (DisasContext *ctx) |
| { |
| int32_t offset; |
| int rs, rt, rd, sa; |
| uint16_t op, op1; |
| int16_t imm; |
| |
| if ((ctx->hflags & MIPS_HFLAG_BMASK) == MIPS_HFLAG_BL) { |
| /* Handle blikely not taken case */ |
| MIPS_DEBUG("blikely condition (%08x)", ctx->pc + 4); |
| gen_blikely(ctx); |
| } |
| op = ctx->opcode >> 26; |
| rs = ((ctx->opcode >> 21) & 0x1F); |
| rt = ((ctx->opcode >> 16) & 0x1F); |
| rd = ((ctx->opcode >> 11) & 0x1F); |
| sa = ((ctx->opcode >> 6) & 0x1F); |
| imm = (int16_t)ctx->opcode; |
| switch (op) { |
| case 0x00: /* Special opcode */ |
| op1 = ctx->opcode & 0x3F; |
| switch (op1) { |
| case 0x00: /* Arithmetic with immediate */ |
| case 0x02 ... 0x03: |
| gen_arith_imm(ctx, op1 | EXT_SPECIAL, rd, rt, sa); |
| break; |
| case 0x04: /* Arithmetic */ |
| case 0x06 ... 0x07: |
| case 0x0A ... 0x0B: |
| case 0x20 ... 0x27: |
| case 0x2A ... 0x2B: |
| gen_arith(ctx, op1 | EXT_SPECIAL, rd, rs, rt); |
| break; |
| case 0x18 ... 0x1B: /* MULT / DIV */ |
| gen_muldiv(ctx, op1 | EXT_SPECIAL, rs, rt); |
| break; |
| case 0x08 ... 0x09: /* Jumps */ |
| gen_compute_branch(ctx, op1 | EXT_SPECIAL, rs, rd, sa); |
| return; |
| case 0x30 ... 0x34: /* Traps */ |
| case 0x36: |
| gen_trap(ctx, op1 | EXT_SPECIAL, rs, rt, -1); |
| break; |
| case 0x10: /* Move from HI/LO */ |
| case 0x12: |
| gen_HILO(ctx, op1 | EXT_SPECIAL, rd); |
| break; |
| case 0x11: |
| case 0x13: /* Move to HI/LO */ |
| gen_HILO(ctx, op1 | EXT_SPECIAL, rs); |
| break; |
| case 0x0C: /* SYSCALL */ |
| generate_exception(ctx, EXCP_SYSCALL); |
| break; |
| case 0x0D: /* BREAK */ |
| generate_exception(ctx, EXCP_BREAK); |
| break; |
| case 0x0F: /* SYNC */ |
| /* Treat as a noop */ |
| break; |
| case 0x05: /* Pmon entry point */ |
| gen_op_pmon((ctx->opcode >> 6) & 0x1F); |
| break; |
| |
| case 0x01: /* MOVCI */ |
| #if defined (MIPS_HAS_MOVCI) |
| /* XXX */ |
| #else |
| /* Not implemented */ |
| generate_exception_err (ctx, EXCP_CpU, 1); |
| #endif |
| break; |
| |
| #if defined (TARGET_MIPS64) |
| case 0x14: /* MIPS64 specific opcodes */ |
| case 0x16: |
| case 0x17: |
| case 0x1C ... 0x1F: |
| case 0x2C ... 0x2F: |
| case 0x37: |
| case 0x39 ... 0x3B: |
| case 0x3E ... 0x3F: |
| #endif |
| default: /* Invalid */ |
| MIPS_INVAL("special"); |
| generate_exception(ctx, EXCP_RI); |
| break; |
| } |
| break; |
| case 0x1C: /* Special2 opcode */ |
| op1 = ctx->opcode & 0x3F; |
| switch (op1) { |
| #if defined (MIPS_USES_R4K_EXT) |
| /* Those instructions are not part of MIPS32 core */ |
| case 0x00 ... 0x01: /* Multiply and add/sub */ |
| case 0x04 ... 0x05: |
| gen_muldiv(ctx, op1 | EXT_SPECIAL2, rs, rt); |
| break; |
| case 0x02: /* MUL */ |
| gen_arith(ctx, op1 | EXT_SPECIAL2, rd, rs, rt); |
| break; |
| case 0x20 ... 0x21: /* CLO / CLZ */ |
| gen_cl(ctx, op1 | EXT_SPECIAL2, rd, rs); |
| break; |
| #endif |
| case 0x3F: /* SDBBP */ |
| /* XXX: not clear which exception should be raised |
| * when in debug mode... |
| */ |
| if (!(ctx->hflags & MIPS_HFLAG_DM)) { |
| generate_exception(ctx, EXCP_DBp); |
| } else { |
| generate_exception(ctx, EXCP_DBp); |
| } |
| /* Treat as a noop */ |
| break; |
| default: /* Invalid */ |
| MIPS_INVAL("special2"); |
| generate_exception(ctx, EXCP_RI); |
| break; |
| } |
| break; |
| case 0x01: /* B REGIMM opcode */ |
| op1 = ((ctx->opcode >> 16) & 0x1F); |
| switch (op1) { |
| case 0x00 ... 0x03: /* REGIMM branches */ |
| case 0x10 ... 0x13: |
| gen_compute_branch(ctx, op1 | EXT_REGIMM, rs, -1, imm << 2); |
| return; |
| case 0x08 ... 0x0C: /* Traps */ |
| case 0x0E: |
| gen_trap(ctx, op1 | EXT_REGIMM, rs, -1, imm); |
| break; |
| default: /* Invalid */ |
| MIPS_INVAL("REGIMM"); |
| generate_exception(ctx, EXCP_RI); |
| break; |
| } |
| break; |
| case 0x10: /* CP0 opcode */ |
| op1 = ((ctx->opcode >> 21) & 0x1F); |
| switch (op1) { |
| case 0x00: |
| case 0x04: |
| gen_cp0(ctx, op1 | EXT_CP0, rt, rd); |
| break; |
| default: |
| gen_cp0(ctx, (ctx->opcode & 0x3F) | EXT_CP0, rt, rd); |
| break; |
| } |
| break; |
| case 0x08 ... 0x0F: /* Arithmetic with immediate opcode */ |
| gen_arith_imm(ctx, op, rt, rs, imm); |
| break; |
| case 0x02 ... 0x03: /* Jump */ |
| offset = (int32_t)(ctx->opcode & 0x03FFFFFF) << 2; |
| gen_compute_branch(ctx, op, rs, rt, offset); |
| return; |
| case 0x04 ... 0x07: /* Branch */ |
| case 0x14 ... 0x17: |
| gen_compute_branch(ctx, op, rs, rt, imm << 2); |
| return; |
| case 0x20 ... 0x26: /* Load and stores */ |
| case 0x28 ... 0x2E: |
| case 0x30: |
| case 0x38: |
| gen_ldst(ctx, op, rt, rs, imm); |
| break; |
| case 0x2F: /* Cache operation */ |
| /* Treat as a noop */ |
| break; |
| case 0x33: /* Prefetch */ |
| /* Treat as a noop */ |
| break; |
| case 0x3F: /* HACK */ |
| break; |
| |
| /* Floating point. */ |
| case 0x31: /* LWC1 */ |
| case 0x35: /* LDC1 */ |
| case 0x39: /* SWC1 */ |
| case 0x3D: /* SDC1 */ |
| case 0x11: /* CP1 opcode */ |
| #if defined(MIPS_USES_FPU) |
| /* XXX: not correct */ |
| #else |
| generate_exception_err(ctx, EXCP_CpU, 1); |
| #endif |
| break; |
| |
| /* COP2. */ |
| case 0x32: /* LWC2 */ |
| case 0x36: /* LDC2 */ |
| case 0x3A: /* SWC2 */ |
| case 0x3E: /* SDC2 */ |
| case 0x12: /* CP2 opcode */ |
| /* Not implemented */ |
| generate_exception_err(ctx, EXCP_CpU, 2); |
| break; |
| |
| case 0x13: /* CP3 opcode */ |
| /* Not implemented */ |
| generate_exception_err(ctx, EXCP_CpU, 3); |
| break; |
| |
| #if defined (TARGET_MIPS64) |
| case 0x18 ... 0x1B: |
| case 0x27: |
| case 0x34: |
| case 0x37: |
| /* MIPS64 opcodes */ |
| #endif |
| #if defined (MIPS_HAS_JALX) |
| case 0x1D: |
| /* JALX: not implemented */ |
| #endif |
| case 0x1E: |
| /* ASE specific */ |
| default: /* Invalid */ |
| MIPS_INVAL(""); |
| generate_exception(ctx, EXCP_RI); |
| break; |
| } |
| if (ctx->hflags & MIPS_HFLAG_BMASK) { |
| int hflags = ctx->hflags; |
| /* Branches completion */ |
| ctx->hflags &= ~MIPS_HFLAG_BMASK; |
| ctx->bstate = BS_BRANCH; |
| save_cpu_state(ctx, 0); |
| switch (hflags & MIPS_HFLAG_BMASK) { |
| case MIPS_HFLAG_B: |
| /* unconditional branch */ |
| MIPS_DEBUG("unconditional branch"); |
| gen_goto_tb(ctx, 0, ctx->btarget); |
| break; |
| case MIPS_HFLAG_BL: |
| /* blikely taken case */ |
| MIPS_DEBUG("blikely branch taken"); |
| gen_goto_tb(ctx, 0, ctx->btarget); |
| break; |
| case MIPS_HFLAG_BC: |
| /* Conditional branch */ |
| MIPS_DEBUG("conditional branch"); |
| { |
| int l1; |
| l1 = gen_new_label(); |
| gen_op_jnz_T2(l1); |
| gen_goto_tb(ctx, 1, ctx->pc + 4); |
| gen_set_label(l1); |
| gen_goto_tb(ctx, 0, ctx->btarget); |
| } |
| break; |
| case MIPS_HFLAG_BR: |
| /* unconditional branch to register */ |
| MIPS_DEBUG("branch to register"); |
| gen_op_breg(); |
| break; |
| default: |
| MIPS_DEBUG("unknown branch"); |
| break; |
| } |
| } |
| } |
| |
| int gen_intermediate_code_internal (CPUState *env, TranslationBlock *tb, |
| int search_pc) |
| { |
| DisasContext ctx, *ctxp = &ctx; |
| target_ulong pc_start; |
| uint16_t *gen_opc_end; |
| int j, lj = -1; |
| |
| if (search_pc && loglevel) |
| fprintf (logfile, "search pc %d\n", search_pc); |
| |
| pc_start = tb->pc; |
| gen_opc_ptr = gen_opc_buf; |
| gen_opc_end = gen_opc_buf + OPC_MAX_SIZE; |
| gen_opparam_ptr = gen_opparam_buf; |
| nb_gen_labels = 0; |
| ctx.pc = pc_start; |
| ctx.saved_pc = -1; |
| ctx.tb = tb; |
| ctx.bstate = BS_NONE; |
| /* Restore delay slot state from the tb context. */ |
| ctx.hflags = tb->flags; |
| ctx.saved_hflags = ctx.hflags; |
| if (ctx.hflags & MIPS_HFLAG_BR) { |
| gen_op_restore_breg_target(); |
| } else if (ctx.hflags & MIPS_HFLAG_B) { |
| ctx.btarget = env->btarget; |
| } else if (ctx.hflags & MIPS_HFLAG_BMASK) { |
| /* If we are in the delay slot of a conditional branch, |
| * restore the branch condition from env->bcond to T2 |
| */ |
| ctx.btarget = env->btarget; |
| gen_op_restore_bcond(); |
| } |
| #if defined(CONFIG_USER_ONLY) |
| ctx.mem_idx = 0; |
| #else |
| ctx.mem_idx = (ctx.hflags & MIPS_HFLAG_MODE) == MIPS_HFLAG_UM ? 0 : 1; |
| #endif |
| ctx.CP0_Status = env->CP0_Status; |
| #ifdef DEBUG_DISAS |
| if (loglevel & CPU_LOG_TB_CPU) { |
| fprintf(logfile, "------------------------------------------------\n"); |
| /* FIXME: This may print out stale hflags from env... */ |
| cpu_dump_state(env, logfile, fprintf, 0); |
| } |
| #endif |
| #if defined MIPS_DEBUG_DISAS |
| if (loglevel & CPU_LOG_TB_IN_ASM) |
| fprintf(logfile, "\ntb %p super %d cond %04x\n", |
| tb, ctx.mem_idx, ctx.hflags); |
| #endif |
| while (ctx.bstate == BS_NONE && gen_opc_ptr < gen_opc_end) { |
| if (env->nb_breakpoints > 0) { |
| for(j = 0; j < env->nb_breakpoints; j++) { |
| if (env->breakpoints[j] == ctx.pc) { |
| save_cpu_state(ctxp, 1); |
| ctx.bstate = BS_BRANCH; |
| gen_op_debug(); |
| goto done_generating; |
| } |
| } |
| } |
| |
| if (search_pc) { |
| j = gen_opc_ptr - gen_opc_buf; |
| if (lj < j) { |
| lj++; |
| while (lj < j) |
| gen_opc_instr_start[lj++] = 0; |
| } |
| gen_opc_pc[lj] = ctx.pc; |
| gen_opc_hflags[lj] = ctx.hflags & MIPS_HFLAG_BMASK; |
| gen_opc_instr_start[lj] = 1; |
| } |
| ctx.opcode = ldl_code(ctx.pc); |
| decode_opc(&ctx); |
| ctx.pc += 4; |
| |
| if (env->singlestep_enabled) |
| break; |
| |
| if ((ctx.pc & (TARGET_PAGE_SIZE - 1)) == 0) |
| break; |
| |
| #if defined (MIPS_SINGLE_STEP) |
| break; |
| #endif |
| } |
| if (env->singlestep_enabled) { |
| save_cpu_state(ctxp, ctx.bstate == BS_NONE); |
| gen_op_debug(); |
| goto done_generating; |
| } |
| else if (ctx.bstate != BS_BRANCH && ctx.bstate != BS_EXCP) { |
| save_cpu_state(ctxp, 0); |
| gen_goto_tb(&ctx, 0, ctx.pc); |
| } |
| gen_op_reset_T0(); |
| /* Generate the return instruction */ |
| gen_op_exit_tb(); |
| done_generating: |
| *gen_opc_ptr = INDEX_op_end; |
| if (search_pc) { |
| j = gen_opc_ptr - gen_opc_buf; |
| lj++; |
| while (lj <= j) |
| gen_opc_instr_start[lj++] = 0; |
| tb->size = 0; |
| } else { |
| tb->size = ctx.pc - pc_start; |
| } |
| #ifdef DEBUG_DISAS |
| #if defined MIPS_DEBUG_DISAS |
| if (loglevel & CPU_LOG_TB_IN_ASM) |
| fprintf(logfile, "\n"); |
| #endif |
| if (loglevel & CPU_LOG_TB_IN_ASM) { |
| fprintf(logfile, "IN: %s\n", lookup_symbol(pc_start)); |
| target_disas(logfile, pc_start, ctx.pc - pc_start, 0); |
| fprintf(logfile, "\n"); |
| } |
| if (loglevel & CPU_LOG_TB_OP) { |
| fprintf(logfile, "OP:\n"); |
| dump_ops(gen_opc_buf, gen_opparam_buf); |
| fprintf(logfile, "\n"); |
| } |
| if (loglevel & CPU_LOG_TB_CPU) { |
| fprintf(logfile, "---------------- %d %08x\n", ctx.bstate, ctx.hflags); |
| } |
| #endif |
| |
| return 0; |
| } |
| |
| int gen_intermediate_code (CPUState *env, struct TranslationBlock *tb) |
| { |
| return gen_intermediate_code_internal(env, tb, 0); |
| } |
| |
| int gen_intermediate_code_pc (CPUState *env, struct TranslationBlock *tb) |
| { |
| return gen_intermediate_code_internal(env, tb, 1); |
| } |
| |
| void cpu_dump_state (CPUState *env, FILE *f, |
| int (*cpu_fprintf)(FILE *f, const char *fmt, ...), |
| int flags) |
| { |
| uint32_t c0_status; |
| int i; |
| |
| cpu_fprintf(f, "pc=0x%08x HI=0x%08x LO=0x%08x ds %04x %08x %d\n", |
| env->PC, env->HI, env->LO, env->hflags, env->btarget, env->bcond); |
| for (i = 0; i < 32; i++) { |
| if ((i & 3) == 0) |
| cpu_fprintf(f, "GPR%02d:", i); |
| cpu_fprintf(f, " %s %08x", regnames[i], env->gpr[i]); |
| if ((i & 3) == 3) |
| cpu_fprintf(f, "\n"); |
| } |
| |
| c0_status = env->CP0_Status; |
| if (env->hflags & MIPS_HFLAG_UM) |
| c0_status |= (1 << CP0St_UM); |
| if (env->hflags & MIPS_HFLAG_ERL) |
| c0_status |= (1 << CP0St_ERL); |
| if (env->hflags & MIPS_HFLAG_EXL) |
| c0_status |= (1 << CP0St_EXL); |
| |
| cpu_fprintf(f, "CP0 Status 0x%08x Cause 0x%08x EPC 0x%08x\n", |
| c0_status, env->CP0_Cause, env->CP0_EPC); |
| cpu_fprintf(f, " Config0 0x%08x Config1 0x%08x LLAddr 0x%08x\n", |
| env->CP0_Config0, env->CP0_Config1, env->CP0_LLAddr); |
| } |
| |
| CPUMIPSState *cpu_mips_init (void) |
| { |
| CPUMIPSState *env; |
| |
| env = qemu_mallocz(sizeof(CPUMIPSState)); |
| if (!env) |
| return NULL; |
| cpu_exec_init(env); |
| tlb_flush(env, 1); |
| /* Minimal init */ |
| env->PC = 0xBFC00000; |
| #if defined (MIPS_USES_R4K_TLB) |
| env->CP0_random = MIPS_TLB_NB - 1; |
| #endif |
| env->CP0_Wired = 0; |
| env->CP0_Config0 = MIPS_CONFIG0; |
| #if defined (MIPS_CONFIG1) |
| env->CP0_Config1 = MIPS_CONFIG1; |
| #endif |
| #if defined (MIPS_CONFIG2) |
| env->CP0_Config2 = MIPS_CONFIG2; |
| #endif |
| #if defined (MIPS_CONFIG3) |
| env->CP0_Config3 = MIPS_CONFIG3; |
| #endif |
| env->CP0_Status = (1 << CP0St_CU0) | (1 << CP0St_BEV); |
| env->CP0_WatchLo = 0; |
| env->hflags = MIPS_HFLAG_ERL; |
| /* Count register increments in debug mode, EJTAG version 1 */ |
| env->CP0_Debug = (1 << CP0DB_CNT) | (0x1 << CP0DB_VER); |
| env->CP0_PRid = MIPS_CPU; |
| env->exception_index = EXCP_NONE; |
| #if defined(CONFIG_USER_ONLY) |
| env->hflags |= MIPS_HFLAG_UM; |
| #endif |
| return env; |
| } |
