diff options
Diffstat (limited to 'target-microblaze/translate.c')
| -rw-r--r-- | target-microblaze/translate.c | 119 |
1 files changed, 110 insertions, 9 deletions
diff --git a/target-microblaze/translate.c b/target-microblaze/translate.c index f618290..6c305d4 100644 --- a/target-microblaze/translate.c +++ b/target-microblaze/translate.c @@ -457,7 +457,7 @@ static void dec_msr(DisasContext *dc) tcg_gen_mov_tl(cpu_SR[SR_ESR], cpu_R[dc->ra]); break; case 0x7: - /* Ignored at the moment. */ + tcg_gen_andi_tl(cpu_SR[SR_FSR], cpu_R[dc->ra], 31); break; default: cpu_abort(dc->env, "unknown mts reg %x\n", sr); @@ -480,7 +480,7 @@ static void dec_msr(DisasContext *dc) tcg_gen_mov_tl(cpu_R[dc->rd], cpu_SR[SR_ESR]); break; case 0x7: - tcg_gen_movi_tl(cpu_R[dc->rd], 0); + tcg_gen_mov_tl(cpu_R[dc->rd], cpu_SR[SR_FSR]); break; case 0xb: tcg_gen_mov_tl(cpu_R[dc->rd], cpu_SR[SR_BTR]); @@ -1134,18 +1134,115 @@ static void dec_rts(DisasContext *dc) tcg_gen_add_tl(env_btarget, cpu_R[dc->ra], *(dec_alu_op_b(dc))); } +static int dec_check_fpuv2(DisasContext *dc) +{ + int r; + + r = dc->env->pvr.regs[2] & PVR2_USE_FPU2_MASK; + + if (!r && (dc->tb_flags & MSR_EE_FLAG)) { + tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_FPU); + t_gen_raise_exception(dc, EXCP_HW_EXCP); + } + return r; +} + static void dec_fpu(DisasContext *dc) { + unsigned int fpu_insn; + if ((dc->tb_flags & MSR_EE_FLAG) && (dc->env->pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK) && !((dc->env->pvr.regs[2] & PVR2_USE_FPU_MASK))) { - tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_FPU); + tcg_gen_movi_tl(cpu_SR[SR_ESR], ESR_EC_ILLEGAL_OP); t_gen_raise_exception(dc, EXCP_HW_EXCP); return; } - qemu_log ("unimplemented FPU insn pc=%x opc=%x\n", dc->pc, dc->opcode); - dc->abort_at_next_insn = 1; + fpu_insn = (dc->ir >> 7) & 7; + + switch (fpu_insn) { + case 0: + gen_helper_fadd(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]); + break; + + case 1: + gen_helper_frsub(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]); + break; + + case 2: + gen_helper_fmul(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]); + break; + + case 3: + gen_helper_fdiv(cpu_R[dc->rd], cpu_R[dc->ra], cpu_R[dc->rb]); + break; + + case 4: + switch ((dc->ir >> 4) & 7) { + case 0: + gen_helper_fcmp_un(cpu_R[dc->rd], + cpu_R[dc->ra], cpu_R[dc->rb]); + break; + case 1: + gen_helper_fcmp_lt(cpu_R[dc->rd], + cpu_R[dc->ra], cpu_R[dc->rb]); + break; + case 2: + gen_helper_fcmp_eq(cpu_R[dc->rd], + cpu_R[dc->ra], cpu_R[dc->rb]); + break; + case 3: + gen_helper_fcmp_le(cpu_R[dc->rd], + cpu_R[dc->ra], cpu_R[dc->rb]); + break; + case 4: + gen_helper_fcmp_gt(cpu_R[dc->rd], + cpu_R[dc->ra], cpu_R[dc->rb]); + break; + case 5: + gen_helper_fcmp_ne(cpu_R[dc->rd], + cpu_R[dc->ra], cpu_R[dc->rb]); + break; + case 6: + gen_helper_fcmp_ge(cpu_R[dc->rd], + cpu_R[dc->ra], cpu_R[dc->rb]); + break; + default: + qemu_log ("unimplemented fcmp fpu_insn=%x pc=%x opc=%x\n", + fpu_insn, dc->pc, dc->opcode); + dc->abort_at_next_insn = 1; + break; + } + break; + + case 5: + if (!dec_check_fpuv2(dc)) { + return; + } + gen_helper_flt(cpu_R[dc->rd], cpu_R[dc->ra]); + break; + + case 6: + if (!dec_check_fpuv2(dc)) { + return; + } + gen_helper_fint(cpu_R[dc->rd], cpu_R[dc->ra]); + break; + + case 7: + if (!dec_check_fpuv2(dc)) { + return; + } + gen_helper_fsqrt(cpu_R[dc->rd], cpu_R[dc->ra]); + break; + + default: + qemu_log ("unimplemented FPU insn fpu_insn=%x pc=%x opc=%x\n", + fpu_insn, dc->pc, dc->opcode); + dc->abort_at_next_insn = 1; + break; + } } static void dec_null(DisasContext *dc) @@ -1448,9 +1545,9 @@ void cpu_dump_state (CPUState *env, FILE *f, cpu_fprintf(f, "IN: PC=%x %s\n", env->sregs[SR_PC], lookup_symbol(env->sregs[SR_PC])); - cpu_fprintf(f, "rmsr=%x resr=%x rear=%x debug[%x] imm=%x iflags=%x\n", + cpu_fprintf(f, "rmsr=%x resr=%x rear=%x debug=%x imm=%x iflags=%x fsr=%x\n", env->sregs[SR_MSR], env->sregs[SR_ESR], env->sregs[SR_EAR], - env->debug, env->imm, env->iflags); + env->debug, env->imm, env->iflags, env->sregs[SR_FSR]); cpu_fprintf(f, "btaken=%d btarget=%x mode=%s(saved=%s) eip=%d ie=%d\n", env->btaken, env->btarget, (env->sregs[SR_MSR] & MSR_UM) ? "user" : "kernel", @@ -1476,7 +1573,7 @@ CPUState *cpu_mb_init (const char *cpu_model) cpu_exec_init(env); cpu_reset(env); - + set_float_rounding_mode(float_round_nearest_even, &env->fp_status); if (tcg_initialized) return env; @@ -1545,15 +1642,19 @@ void cpu_reset (CPUState *env) | PVR2_USE_DIV_MASK \ | PVR2_USE_HW_MUL_MASK \ | PVR2_USE_MUL64_MASK \ + | PVR2_USE_FPU_MASK \ + | PVR2_USE_FPU2_MASK \ + | PVR2_FPU_EXC_MASK \ | 0; env->pvr.regs[10] = 0x0c000000; /* Default to spartan 3a dsp family. */ env->pvr.regs[11] = PVR11_USE_MMU | (16 << 17); - env->sregs[SR_MSR] = 0; #if defined(CONFIG_USER_ONLY) /* start in user mode with interrupts enabled. */ + env->sregs[SR_MSR] = MSR_EE | MSR_IE | MSR_VM | MSR_UM; env->pvr.regs[10] = 0x0c000000; /* Spartan 3a dsp. */ #else + env->sregs[SR_MSR] = 0; mmu_init(&env->mmu); env->mmu.c_mmu = 3; env->mmu.c_mmu_tlb_access = 3; |