/* * Copyright (C) 2010-2011 GUAN Xue-tao * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include "cpu.h" #include "gdbstub.h" #include "helper.h" #include "qemu-common.h" #include "host-utils.h" static inline void set_feature(CPUState *env, int feature) { env->features |= feature; } struct uc32_cpu_t { uint32_t id; const char *name; }; static const struct uc32_cpu_t uc32_cpu_names[] = { { UC32_CPUID_UCV2, "UniCore-II"}, { UC32_CPUID_ANY, "any"}, { 0, NULL} }; /* return 0 if not found */ static uint32_t uc32_cpu_find_by_name(const char *name) { int i; uint32_t id; id = 0; for (i = 0; uc32_cpu_names[i].name; i++) { if (strcmp(name, uc32_cpu_names[i].name) == 0) { id = uc32_cpu_names[i].id; break; } } return id; } CPUState *uc32_cpu_init(const char *cpu_model) { CPUState *env; uint32_t id; static int inited = 1; env = g_malloc0(sizeof(CPUState)); cpu_exec_init(env); id = uc32_cpu_find_by_name(cpu_model); switch (id) { case UC32_CPUID_UCV2: set_feature(env, UC32_HWCAP_CMOV); set_feature(env, UC32_HWCAP_UCF64); env->ucf64.xregs[UC32_UCF64_FPSCR] = 0; env->cp0.c0_cachetype = 0x1dd20d2; env->cp0.c1_sys = 0x00090078; break; case UC32_CPUID_ANY: /* For userspace emulation. */ set_feature(env, UC32_HWCAP_CMOV); set_feature(env, UC32_HWCAP_UCF64); break; default: cpu_abort(env, "Bad CPU ID: %x\n", id); } env->cpu_model_str = cpu_model; env->cp0.c0_cpuid = id; env->uncached_asr = ASR_MODE_USER; env->regs[31] = 0; if (inited) { inited = 0; uc32_translate_init(); } tlb_flush(env, 1); qemu_init_vcpu(env); return env; } uint32_t HELPER(clo)(uint32_t x) { return clo32(x); } uint32_t HELPER(clz)(uint32_t x) { return clz32(x); } void do_interrupt(CPUState *env) { env->exception_index = -1; } int uc32_cpu_handle_mmu_fault(CPUState *env, target_ulong address, int rw, int mmu_idx) { env->exception_index = UC32_EXCP_TRAP; env->cp0.c4_faultaddr = address; return 1; } /* These should probably raise undefined insn exceptions. */ void HELPER(set_cp)(CPUState *env, uint32_t insn, uint32_t val) { int op1 = (insn >> 8) & 0xf; cpu_abort(env, "cp%i insn %08x\n", op1, insn); return; } uint32_t HELPER(get_cp)(CPUState *env, uint32_t insn) { int op1 = (insn >> 8) & 0xf; cpu_abort(env, "cp%i insn %08x\n", op1, insn); return 0; } void HELPER(set_cp0)(CPUState *env, uint32_t insn, uint32_t val) { cpu_abort(env, "cp0 insn %08x\n", insn); } uint32_t HELPER(get_cp0)(CPUState *env, uint32_t insn) { cpu_abort(env, "cp0 insn %08x\n", insn); return 0; } void switch_mode(CPUState *env, int mode) { if (mode != ASR_MODE_USER) { cpu_abort(env, "Tried to switch out of user mode\n"); } } void HELPER(set_r29_banked)(CPUState *env, uint32_t mode, uint32_t val) { cpu_abort(env, "banked r29 write\n"); } uint32_t HELPER(get_r29_banked)(CPUState *env, uint32_t mode) { cpu_abort(env, "banked r29 read\n"); return 0; } /* UniCore-F64 support. We follow the convention used for F64 instrunctions: Single precition routines have a "s" suffix, double precision a "d" suffix. */ /* Convert host exception flags to f64 form. */ static inline int ucf64_exceptbits_from_host(int host_bits) { int target_bits = 0; if (host_bits & float_flag_invalid) { target_bits |= UCF64_FPSCR_FLAG_INVALID; } if (host_bits & float_flag_divbyzero) { target_bits |= UCF64_FPSCR_FLAG_DIVZERO; } if (host_bits & float_flag_overflow) { target_bits |= UCF64_FPSCR_FLAG_OVERFLOW; } if (host_bits & float_flag_underflow) { target_bits |= UCF64_FPSCR_FLAG_UNDERFLOW; } if (host_bits & float_flag_inexact) { target_bits |= UCF64_FPSCR_FLAG_INEXACT; } return target_bits; } uint32_t HELPER(ucf64_get_fpscr)(CPUState *env) { int i; uint32_t fpscr; fpscr = (env->ucf64.xregs[UC32_UCF64_FPSCR] & UCF64_FPSCR_MASK); i = get_float_exception_flags(&env->ucf64.fp_status); fpscr |= ucf64_exceptbits_from_host(i); return fpscr; } /* Convert ucf64 exception flags to target form. */ static inline int ucf64_exceptbits_to_host(int target_bits) { int host_bits = 0; if (target_bits & UCF64_FPSCR_FLAG_INVALID) { host_bits |= float_flag_invalid; } if (target_bits & UCF64_FPSCR_FLAG_DIVZERO) { host_bits |= float_flag_divbyzero; } if (target_bits & UCF64_FPSCR_FLAG_OVERFLOW) { host_bits |= float_flag_overflow; } if (target_bits & UCF64_FPSCR_FLAG_UNDERFLOW) { host_bits |= float_flag_underflow; } if (target_bits & UCF64_FPSCR_FLAG_INEXACT) { host_bits |= float_flag_inexact; } return host_bits; } void HELPER(ucf64_set_fpscr)(CPUState *env, uint32_t val) { int i; uint32_t changed; changed = env->ucf64.xregs[UC32_UCF64_FPSCR]; env->ucf64.xregs[UC32_UCF64_FPSCR] = (val & UCF64_FPSCR_MASK); changed ^= val; if (changed & (UCF64_FPSCR_RND_MASK)) { i = UCF64_FPSCR_RND(val); switch (i) { case 0: i = float_round_nearest_even; break; case 1: i = float_round_to_zero; break; case 2: i = float_round_up; break; case 3: i = float_round_down; break; default: /* 100 and 101 not implement */ cpu_abort(env, "Unsupported UniCore-F64 round mode"); } set_float_rounding_mode(i, &env->ucf64.fp_status); } i = ucf64_exceptbits_to_host(UCF64_FPSCR_TRAPEN(val)); set_float_exception_flags(i, &env->ucf64.fp_status); } float32 HELPER(ucf64_adds)(float32 a, float32 b, CPUState *env) { return float32_add(a, b, &env->ucf64.fp_status); } float64 HELPER(ucf64_addd)(float64 a, float64 b, CPUState *env) { return float64_add(a, b, &env->ucf64.fp_status); } float32 HELPER(ucf64_subs)(float32 a, float32 b, CPUState *env) { return float32_sub(a, b, &env->ucf64.fp_status); } float64 HELPER(ucf64_subd)(float64 a, float64 b, CPUState *env) { return float64_sub(a, b, &env->ucf64.fp_status); } float32 HELPER(ucf64_muls)(float32 a, float32 b, CPUState *env) { return float32_mul(a, b, &env->ucf64.fp_status); } float64 HELPER(ucf64_muld)(float64 a, float64 b, CPUState *env) { return float64_mul(a, b, &env->ucf64.fp_status); } float32 HELPER(ucf64_divs)(float32 a, float32 b, CPUState *env) { return float32_div(a, b, &env->ucf64.fp_status); } float64 HELPER(ucf64_divd)(float64 a, float64 b, CPUState *env) { return float64_div(a, b, &env->ucf64.fp_status); } float32 HELPER(ucf64_negs)(float32 a) { return float32_chs(a); } float64 HELPER(ucf64_negd)(float64 a) { return float64_chs(a); } float32 HELPER(ucf64_abss)(float32 a) { return float32_abs(a); } float64 HELPER(ucf64_absd)(float64 a) { return float64_abs(a); } /* XXX: check quiet/signaling case */ void HELPER(ucf64_cmps)(float32 a, float32 b, uint32_t c, CPUState *env) { int flag; flag = float32_compare_quiet(a, b, &env->ucf64.fp_status); env->CF = 0; switch (c & 0x7) { case 0: /* F */ break; case 1: /* UN */ if (flag == 2) { env->CF = 1; } break; case 2: /* EQ */ if (flag == 0) { env->CF = 1; } break; case 3: /* UEQ */ if ((flag == 0) || (flag == 2)) { env->CF = 1; } break; case 4: /* OLT */ if (flag == -1) { env->CF = 1; } break; case 5: /* ULT */ if ((flag == -1) || (flag == 2)) { env->CF = 1; } break; case 6: /* OLE */ if ((flag == -1) || (flag == 0)) { env->CF = 1; } break; case 7: /* ULE */ if (flag != 1) { env->CF = 1; } break; } env->ucf64.xregs[UC32_UCF64_FPSCR] = (env->CF << 29) | (env->ucf64.xregs[UC32_UCF64_FPSCR] & 0x0fffffff); } void HELPER(ucf64_cmpd)(float64 a, float64 b, uint32_t c, CPUState *env) { int flag; flag = float64_compare_quiet(a, b, &env->ucf64.fp_status); env->CF = 0; switch (c & 0x7) { case 0: /* F */ break; case 1: /* UN */ if (flag == 2) { env->CF = 1; } break; case 2: /* EQ */ if (flag == 0) { env->CF = 1; } break; case 3: /* UEQ */ if ((flag == 0) || (flag == 2)) { env->CF = 1; } break; case 4: /* OLT */ if (flag == -1) { env->CF = 1; } break; case 5: /* ULT */ if ((flag == -1) || (flag == 2)) { env->CF = 1; } break; case 6: /* OLE */ if ((flag == -1) || (flag == 0)) { env->CF = 1; } break; case 7: /* ULE */ if (flag != 1) { env->CF = 1; } break; } env->ucf64.xregs[UC32_UCF64_FPSCR] = (env->CF << 29) | (env->ucf64.xregs[UC32_UCF64_FPSCR] & 0x0fffffff); } /* Helper routines to perform bitwise copies between float and int. */ static inline float32 ucf64_itos(uint32_t i) { union { uint32_t i; float32 s; } v; v.i = i; return v.s; } static inline uint32_t ucf64_stoi(float32 s) { union { uint32_t i; float32 s; } v; v.s = s; return v.i; } static inline float64 ucf64_itod(uint64_t i) { union { uint64_t i; float64 d; } v; v.i = i; return v.d; } static inline uint64_t ucf64_dtoi(float64 d) { union { uint64_t i; float64 d; } v; v.d = d; return v.i; } /* Integer to float conversion. */ float32 HELPER(ucf64_si2sf)(float32 x, CPUState *env) { return int32_to_float32(ucf64_stoi(x), &env->ucf64.fp_status); } float64 HELPER(ucf64_si2df)(float32 x, CPUState *env) { return int32_to_float64(ucf64_stoi(x), &env->ucf64.fp_status); } /* Float to integer conversion. */ float32 HELPER(ucf64_sf2si)(float32 x, CPUState *env) { return ucf64_itos(float32_to_int32(x, &env->ucf64.fp_status)); } float32 HELPER(ucf64_df2si)(float64 x, CPUState *env) { return ucf64_itos(float64_to_int32(x, &env->ucf64.fp_status)); } /* floating point conversion */ float64 HELPER(ucf64_sf2df)(float32 x, CPUState *env) { return float32_to_float64(x, &env->ucf64.fp_status); } float32 HELPER(ucf64_df2sf)(float64 x, CPUState *env) { return float64_to_float32(x, &env->ucf64.fp_status); }