From db9f3fd69d5bccfd25f84d5cec805308406b7b8f Mon Sep 17 00:00:00 2001 From: Michael Clark Date: Mon, 14 Jan 2019 23:58:42 +0000 Subject: [PATCH] RISC-V: Add misa to DisasContext gen methods should access state from DisasContext. Add misa field to the DisasContext struct and remove CPURISCVState argument from all gen methods. Signed-off-by: Michael Clark Reviewed-by: Richard Henderson Signed-off-by: Alistair Francis Signed-off-by: Palmer Dabbelt --- target/riscv/translate.c | 75 ++++++++++++++++++++++++++---------------------- 1 file changed, 40 insertions(+), 35 deletions(-) diff --git a/target/riscv/translate.c b/target/riscv/translate.c index 35eb6bdfe0..bb80387088 100644 --- a/target/riscv/translate.c +++ b/target/riscv/translate.c @@ -46,6 +46,7 @@ typedef struct DisasContext { target_ulong priv_ver; uint32_t opcode; uint32_t mstatus_fs; + uint32_t misa; uint32_t mem_idx; /* Remember the rounding mode encoded in the previous fp instruction, which we have already installed into env->fp_status. Or -1 for @@ -75,6 +76,11 @@ static const int tcg_memop_lookup[8] = { #define CASE_OP_32_64(X) case X #endif +static inline bool has_ext(DisasContext *ctx, uint32_t ext) +{ + return ctx->misa & ext; +} + static void generate_exception(DisasContext *ctx, int excp) { tcg_gen_movi_tl(cpu_pc, ctx->base.pc_next); @@ -506,14 +512,13 @@ static void gen_arith_imm(DisasContext *ctx, uint32_t opc, int rd, tcg_temp_free(source1); } -static void gen_jal(CPURISCVState *env, DisasContext *ctx, int rd, - target_ulong imm) +static void gen_jal(DisasContext *ctx, int rd, target_ulong imm) { target_ulong next_pc; /* check misaligned: */ next_pc = ctx->base.pc_next + imm; - if (!riscv_has_ext(env, RVC)) { + if (!has_ext(ctx, RVC)) { if ((next_pc & 0x3) != 0) { gen_exception_inst_addr_mis(ctx); return; @@ -527,8 +532,8 @@ static void gen_jal(CPURISCVState *env, DisasContext *ctx, int rd, ctx->base.is_jmp = DISAS_NORETURN; } -static void gen_jalr(CPURISCVState *env, DisasContext *ctx, uint32_t opc, - int rd, int rs1, target_long imm) +static void gen_jalr(DisasContext *ctx, uint32_t opc, int rd, int rs1, + target_long imm) { /* no chaining with JALR */ TCGLabel *misaligned = NULL; @@ -540,7 +545,7 @@ static void gen_jalr(CPURISCVState *env, DisasContext *ctx, uint32_t opc, tcg_gen_addi_tl(cpu_pc, cpu_pc, imm); tcg_gen_andi_tl(cpu_pc, cpu_pc, (target_ulong)-2); - if (!riscv_has_ext(env, RVC)) { + if (!has_ext(ctx, RVC)) { misaligned = gen_new_label(); tcg_gen_andi_tl(t0, cpu_pc, 0x2); tcg_gen_brcondi_tl(TCG_COND_NE, t0, 0x0, misaligned); @@ -565,8 +570,8 @@ static void gen_jalr(CPURISCVState *env, DisasContext *ctx, uint32_t opc, tcg_temp_free(t0); } -static void gen_branch(CPURISCVState *env, DisasContext *ctx, uint32_t opc, - int rs1, int rs2, target_long bimm) +static void gen_branch(DisasContext *ctx, uint32_t opc, int rs1, int rs2, + target_long bimm) { TCGLabel *l = gen_new_label(); TCGv source1, source2; @@ -603,7 +608,7 @@ static void gen_branch(CPURISCVState *env, DisasContext *ctx, uint32_t opc, gen_goto_tb(ctx, 1, ctx->pc_succ_insn); gen_set_label(l); /* branch taken */ - if (!riscv_has_ext(env, RVC) && ((ctx->base.pc_next + bimm) & 0x3)) { + if (!has_ext(ctx, RVC) && ((ctx->base.pc_next + bimm) & 0x3)) { /* misaligned */ gen_exception_inst_addr_mis(ctx); } else { @@ -1314,8 +1319,8 @@ static void gen_fp_arith(DisasContext *ctx, uint32_t opc, int rd, } } -static void gen_system(CPURISCVState *env, DisasContext *ctx, uint32_t opc, - int rd, int rs1, int csr) +static void gen_system(DisasContext *ctx, uint32_t opc, int rd, int rs1, + int csr) { TCGv source1, csr_store, dest, rs1_pass, imm_rs1; source1 = tcg_temp_new(); @@ -1361,7 +1366,7 @@ static void gen_system(CPURISCVState *env, DisasContext *ctx, uint32_t opc, gen_exception_illegal(ctx); break; case 0x102: /* SRET */ - if (riscv_has_ext(env, RVS)) { + if (has_ext(ctx, RVS)) { gen_helper_sret(cpu_pc, cpu_env, cpu_pc); tcg_gen_exit_tb(NULL, 0); /* no chaining */ ctx->base.is_jmp = DISAS_NORETURN; @@ -1506,7 +1511,7 @@ static void decode_RV32_64C0(DisasContext *ctx) } } -static void decode_RV32_64C1(CPURISCVState *env, DisasContext *ctx) +static void decode_RV32_64C1(DisasContext *ctx) { uint8_t funct3 = extract32(ctx->opcode, 13, 3); uint8_t rd_rs1 = GET_C_RS1(ctx->opcode); @@ -1526,7 +1531,7 @@ static void decode_RV32_64C1(CPURISCVState *env, DisasContext *ctx) GET_C_IMM(ctx->opcode)); #else /* C.JAL(RV32) -> jal x1, offset[11:1] */ - gen_jal(env, ctx, 1, GET_C_J_IMM(ctx->opcode)); + gen_jal(ctx, 1, GET_C_J_IMM(ctx->opcode)); #endif break; case 2: @@ -1605,22 +1610,22 @@ static void decode_RV32_64C1(CPURISCVState *env, DisasContext *ctx) break; case 5: /* C.J -> jal x0, offset[11:1]*/ - gen_jal(env, ctx, 0, GET_C_J_IMM(ctx->opcode)); + gen_jal(ctx, 0, GET_C_J_IMM(ctx->opcode)); break; case 6: /* C.BEQZ -> beq rs1', x0, offset[8:1]*/ rs1s = GET_C_RS1S(ctx->opcode); - gen_branch(env, ctx, OPC_RISC_BEQ, rs1s, 0, GET_C_B_IMM(ctx->opcode)); + gen_branch(ctx, OPC_RISC_BEQ, rs1s, 0, GET_C_B_IMM(ctx->opcode)); break; case 7: /* C.BNEZ -> bne rs1', x0, offset[8:1]*/ rs1s = GET_C_RS1S(ctx->opcode); - gen_branch(env, ctx, OPC_RISC_BNE, rs1s, 0, GET_C_B_IMM(ctx->opcode)); + gen_branch(ctx, OPC_RISC_BNE, rs1s, 0, GET_C_B_IMM(ctx->opcode)); break; } } -static void decode_RV32_64C2(CPURISCVState *env, DisasContext *ctx) +static void decode_RV32_64C2(DisasContext *ctx) { uint8_t rd, rs2; uint8_t funct3 = extract32(ctx->opcode, 13, 3); @@ -1654,7 +1659,7 @@ static void decode_RV32_64C2(CPURISCVState *env, DisasContext *ctx) if (extract32(ctx->opcode, 12, 1) == 0) { if (rs2 == 0) { /* C.JR -> jalr x0, rs1, 0*/ - gen_jalr(env, ctx, OPC_RISC_JALR, 0, rd, 0); + gen_jalr(ctx, OPC_RISC_JALR, 0, rd, 0); } else { /* C.MV -> add rd, x0, rs2 */ gen_arith(ctx, OPC_RISC_ADD, rd, 0, rs2); @@ -1662,11 +1667,11 @@ static void decode_RV32_64C2(CPURISCVState *env, DisasContext *ctx) } else { if (rd == 0) { /* C.EBREAK -> ebreak*/ - gen_system(env, ctx, OPC_RISC_ECALL, 0, 0, 0x1); + gen_system(ctx, OPC_RISC_ECALL, 0, 0, 0x1); } else { if (rs2 == 0) { /* C.JALR -> jalr x1, rs1, 0*/ - gen_jalr(env, ctx, OPC_RISC_JALR, 1, rd, 0); + gen_jalr(ctx, OPC_RISC_JALR, 1, rd, 0); } else { /* C.ADD -> add rd, rd, rs2 */ gen_arith(ctx, OPC_RISC_ADD, rd, rd, rs2); @@ -1698,7 +1703,7 @@ static void decode_RV32_64C2(CPURISCVState *env, DisasContext *ctx) } } -static void decode_RV32_64C(CPURISCVState *env, DisasContext *ctx) +static void decode_RV32_64C(DisasContext *ctx) { uint8_t op = extract32(ctx->opcode, 0, 2); @@ -1707,15 +1712,15 @@ static void decode_RV32_64C(CPURISCVState *env, DisasContext *ctx) decode_RV32_64C0(ctx); break; case 1: - decode_RV32_64C1(env, ctx); + decode_RV32_64C1(ctx); break; case 2: - decode_RV32_64C2(env, ctx); + decode_RV32_64C2(ctx); break; } } -static void decode_RV32_64G(CPURISCVState *env, DisasContext *ctx) +static void decode_RV32_64G(DisasContext *ctx) { int rs1; int rs2; @@ -1750,13 +1755,13 @@ static void decode_RV32_64G(CPURISCVState *env, DisasContext *ctx) break; case OPC_RISC_JAL: imm = GET_JAL_IMM(ctx->opcode); - gen_jal(env, ctx, rd, imm); + gen_jal(ctx, rd, imm); break; case OPC_RISC_JALR: - gen_jalr(env, ctx, MASK_OP_JALR(ctx->opcode), rd, rs1, imm); + gen_jalr(ctx, MASK_OP_JALR(ctx->opcode), rd, rs1, imm); break; case OPC_RISC_BRANCH: - gen_branch(env, ctx, MASK_OP_BRANCH(ctx->opcode), rs1, rs2, + gen_branch(ctx, MASK_OP_BRANCH(ctx->opcode), rs1, rs2, GET_B_IMM(ctx->opcode)); break; case OPC_RISC_LOAD: @@ -1827,7 +1832,7 @@ static void decode_RV32_64G(CPURISCVState *env, DisasContext *ctx) } break; case OPC_RISC_SYSTEM: - gen_system(env, ctx, MASK_OP_SYSTEM(ctx->opcode), rd, rs1, + gen_system(ctx, MASK_OP_SYSTEM(ctx->opcode), rd, rs1, (ctx->opcode & 0xFFF00000) >> 20); break; default: @@ -1836,19 +1841,19 @@ static void decode_RV32_64G(CPURISCVState *env, DisasContext *ctx) } } -static void decode_opc(CPURISCVState *env, DisasContext *ctx) +static void decode_opc(DisasContext *ctx) { /* check for compressed insn */ if (extract32(ctx->opcode, 0, 2) != 3) { - if (!riscv_has_ext(env, RVC)) { + if (!has_ext(ctx, RVC)) { gen_exception_illegal(ctx); } else { ctx->pc_succ_insn = ctx->base.pc_next + 2; - decode_RV32_64C(env, ctx); + decode_RV32_64C(ctx); } } else { ctx->pc_succ_insn = ctx->base.pc_next + 4; - decode_RV32_64G(env, ctx); + decode_RV32_64G(ctx); } } @@ -1861,6 +1866,7 @@ static void riscv_tr_init_disas_context(DisasContextBase *dcbase, CPUState *cs) ctx->mem_idx = ctx->base.tb->flags & TB_FLAGS_MMU_MASK; ctx->mstatus_fs = ctx->base.tb->flags & TB_FLAGS_MSTATUS_FS; ctx->priv_ver = env->priv_ver; + ctx->misa = env->misa; ctx->frm = -1; /* unknown rounding mode */ } @@ -1891,14 +1897,13 @@ static bool riscv_tr_breakpoint_check(DisasContextBase *dcbase, CPUState *cpu, return true; } - static void riscv_tr_translate_insn(DisasContextBase *dcbase, CPUState *cpu) { DisasContext *ctx = container_of(dcbase, DisasContext, base); CPURISCVState *env = cpu->env_ptr; ctx->opcode = cpu_ldl_code(env, ctx->base.pc_next); - decode_opc(env, ctx); + decode_opc(ctx); ctx->base.pc_next = ctx->pc_succ_insn; if (ctx->base.is_jmp == DISAS_NEXT) { -- 2.11.0