/* * SH4 emulation * * Copyright (c) 2005 Samuel Tardieu * * 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, see <http://www.gnu.org/licenses/>. */ #include <assert.h> #include <stdlib.h> #include "exec.h" #include "helper.h" #ifndef CONFIG_USER_ONLY #define MMUSUFFIX _mmu #define SHIFT 0 #include "softmmu_template.h" #define SHIFT 1 #include "softmmu_template.h" #define SHIFT 2 #include "softmmu_template.h" #define SHIFT 3 #include "softmmu_template.h" void tlb_fill(target_ulong addr, int is_write, int mmu_idx, void *retaddr) { TranslationBlock *tb; CPUState *saved_env; unsigned long pc; int ret; /* XXX: hack to restore env in all cases, even if not called from generated code */ saved_env = env; env = cpu_single_env; ret = cpu_sh4_handle_mmu_fault(env, addr, is_write, mmu_idx, 1); if (ret) { if (retaddr) { /* now we have a real cpu fault */ pc = (unsigned long) retaddr; tb = tb_find_pc(pc); if (tb) { /* the PC is inside the translated code. It means that we have a virtual CPU fault */ cpu_restore_state(tb, env, pc, NULL); } } cpu_loop_exit(); } env = saved_env; } #endif void helper_ldtlb(void) { #ifdef CONFIG_USER_ONLY /* XXXXX */ assert(0); #else cpu_load_tlb(env); #endif } void helper_raise_illegal_instruction(void) { env->exception_index = 0x180; cpu_loop_exit(); } void helper_raise_slot_illegal_instruction(void) { env->exception_index = 0x1a0; cpu_loop_exit(); } void helper_raise_fpu_disable(void) { env->exception_index = 0x800; cpu_loop_exit(); } void helper_raise_slot_fpu_disable(void) { env->exception_index = 0x820; cpu_loop_exit(); } void helper_debug(void) { env->exception_index = EXCP_DEBUG; cpu_loop_exit(); } void helper_sleep(uint32_t next_pc) { env->halted = 1; env->exception_index = EXCP_HLT; env->pc = next_pc; cpu_loop_exit(); } void helper_trapa(uint32_t tra) { env->tra = tra << 2; env->exception_index = 0x160; cpu_loop_exit(); } void helper_movcal(uint32_t address, uint32_t value) { if (cpu_sh4_is_cached (env, address)) { memory_content *r = malloc (sizeof(memory_content)); r->address = address; r->value = value; r->next = NULL; *(env->movcal_backup_tail) = r; env->movcal_backup_tail = &(r->next); } } void helper_discard_movcal_backup(void) { memory_content *current = env->movcal_backup; while(current) { memory_content *next = current->next; free (current); env->movcal_backup = current = next; if (current == NULL) env->movcal_backup_tail = &(env->movcal_backup); } } void helper_ocbi(uint32_t address) { memory_content **current = &(env->movcal_backup); while (*current) { uint32_t a = (*current)->address; if ((a & ~0x1F) == (address & ~0x1F)) { memory_content *next = (*current)->next; stl(a, (*current)->value); if (next == NULL) { env->movcal_backup_tail = current; } free (*current); *current = next; break; } } } uint32_t helper_addc(uint32_t arg0, uint32_t arg1) { uint32_t tmp0, tmp1; tmp1 = arg0 + arg1; tmp0 = arg1; arg1 = tmp1 + (env->sr & 1); if (tmp0 > tmp1) env->sr |= SR_T; else env->sr &= ~SR_T; if (tmp1 > arg1) env->sr |= SR_T; return arg1; } uint32_t helper_addv(uint32_t arg0, uint32_t arg1) { uint32_t dest, src, ans; if ((int32_t) arg1 >= 0) dest = 0; else dest = 1; if ((int32_t) arg0 >= 0) src = 0; else src = 1; src += dest; arg1 += arg0; if ((int32_t) arg1 >= 0) ans = 0; else ans = 1; ans += dest; if (src == 0 || src == 2) { if (ans == 1) env->sr |= SR_T; else env->sr &= ~SR_T; } else env->sr &= ~SR_T; return arg1; } #define T (env->sr & SR_T) #define Q (env->sr & SR_Q ? 1 : 0) #define M (env->sr & SR_M ? 1 : 0) #define SETT env->sr |= SR_T #define CLRT env->sr &= ~SR_T #define SETQ env->sr |= SR_Q #define CLRQ env->sr &= ~SR_Q #define SETM env->sr |= SR_M #define CLRM env->sr &= ~SR_M uint32_t helper_div1(uint32_t arg0, uint32_t arg1) { uint32_t tmp0, tmp2; uint8_t old_q, tmp1 = 0xff; //printf("div1 arg0=0x%08x arg1=0x%08x M=%d Q=%d T=%d\n", arg0, arg1, M, Q, T); old_q = Q; if ((0x80000000 & arg1) != 0) SETQ; else CLRQ; tmp2 = arg0; arg1 <<= 1; arg1 |= T; switch (old_q) { case 0: switch (M) { case 0: tmp0 = arg1; arg1 -= tmp2; tmp1 = arg1 > tmp0; switch (Q) { case 0: if (tmp1) SETQ; else CLRQ; break; case 1: if (tmp1 == 0) SETQ; else CLRQ; break; } break; case 1: tmp0 = arg1; arg1 += tmp2; tmp1 = arg1 < tmp0; switch (Q) { case 0: if (tmp1 == 0) SETQ; else CLRQ; break; case 1: if (tmp1) SETQ; else CLRQ; break; } break; } break; case 1: switch (M) { case 0: tmp0 = arg1; arg1 += tmp2; tmp1 = arg1 < tmp0; switch (Q) { case 0: if (tmp1) SETQ; else CLRQ; break; case 1: if (tmp1 == 0) SETQ; else CLRQ; break; } break; case 1: tmp0 = arg1; arg1 -= tmp2; tmp1 = arg1 > tmp0; switch (Q) { case 0: if (tmp1 == 0) SETQ; else CLRQ; break; case 1: if (tmp1) SETQ; else CLRQ; break; } break; } break; } if (Q == M) SETT; else CLRT; //printf("Output: arg1=0x%08x M=%d Q=%d T=%d\n", arg1, M, Q, T); return arg1; } void helper_macl(uint32_t arg0, uint32_t arg1) { int64_t res; res = ((uint64_t) env->mach << 32) | env->macl; res += (int64_t) (int32_t) arg0 *(int64_t) (int32_t) arg1; env->mach = (res >> 32) & 0xffffffff; env->macl = res & 0xffffffff; if (env->sr & SR_S) { if (res < 0) env->mach |= 0xffff0000; else env->mach &= 0x00007fff; } } void helper_macw(uint32_t arg0, uint32_t arg1) { int64_t res; res = ((uint64_t) env->mach << 32) | env->macl; res += (int64_t) (int16_t) arg0 *(int64_t) (int16_t) arg1; env->mach = (res >> 32) & 0xffffffff; env->macl = res & 0xffffffff; if (env->sr & SR_S) { if (res < -0x80000000) { env->mach = 1; env->macl = 0x80000000; } else if (res > 0x000000007fffffff) { env->mach = 1; env->macl = 0x7fffffff; } } } uint32_t helper_negc(uint32_t arg) { uint32_t temp; temp = -arg; arg = temp - (env->sr & SR_T); if (0 < temp) env->sr |= SR_T; else env->sr &= ~SR_T; if (temp < arg) env->sr |= SR_T; return arg; } uint32_t helper_subc(uint32_t arg0, uint32_t arg1) { uint32_t tmp0, tmp1; tmp1 = arg1 - arg0; tmp0 = arg1; arg1 = tmp1 - (env->sr & SR_T); if (tmp0 < tmp1) env->sr |= SR_T; else env->sr &= ~SR_T; if (tmp1 < arg1) env->sr |= SR_T; return arg1; } uint32_t helper_subv(uint32_t arg0, uint32_t arg1) { int32_t dest, src, ans; if ((int32_t) arg1 >= 0) dest = 0; else dest = 1; if ((int32_t) arg0 >= 0) src = 0; else src = 1; src += dest; arg1 -= arg0; if ((int32_t) arg1 >= 0) ans = 0; else ans = 1; ans += dest; if (src == 1) { if (ans == 1) env->sr |= SR_T; else env->sr &= ~SR_T; } else env->sr &= ~SR_T; return arg1; } static inline void set_t(void) { env->sr |= SR_T; } static inline void clr_t(void) { env->sr &= ~SR_T; } void helper_ld_fpscr(uint32_t val) { env->fpscr = val & 0x003fffff; if (val & 0x01) set_float_rounding_mode(float_round_to_zero, &env->fp_status); else set_float_rounding_mode(float_round_nearest_even, &env->fp_status); } uint32_t helper_fabs_FT(uint32_t t0) { CPU_FloatU f; f.l = t0; f.f = float32_abs(f.f); return f.l; } uint64_t helper_fabs_DT(uint64_t t0) { CPU_DoubleU d; d.ll = t0; d.d = float64_abs(d.d); return d.ll; } uint32_t helper_fadd_FT(uint32_t t0, uint32_t t1) { CPU_FloatU f0, f1; f0.l = t0; f1.l = t1; f0.f = float32_add(f0.f, f1.f, &env->fp_status); return f0.l; } uint64_t helper_fadd_DT(uint64_t t0, uint64_t t1) { CPU_DoubleU d0, d1; d0.ll = t0; d1.ll = t1; d0.d = float64_add(d0.d, d1.d, &env->fp_status); return d0.ll; } void helper_fcmp_eq_FT(uint32_t t0, uint32_t t1) { CPU_FloatU f0, f1; f0.l = t0; f1.l = t1; if (float32_compare(f0.f, f1.f, &env->fp_status) == 0) set_t(); else clr_t(); } void helper_fcmp_eq_DT(uint64_t t0, uint64_t t1) { CPU_DoubleU d0, d1; d0.ll = t0; d1.ll = t1; if (float64_compare(d0.d, d1.d, &env->fp_status) == 0) set_t(); else clr_t(); } void helper_fcmp_gt_FT(uint32_t t0, uint32_t t1) { CPU_FloatU f0, f1; f0.l = t0; f1.l = t1; if (float32_compare(f0.f, f1.f, &env->fp_status) == 1) set_t(); else clr_t(); } void helper_fcmp_gt_DT(uint64_t t0, uint64_t t1) { CPU_DoubleU d0, d1; d0.ll = t0; d1.ll = t1; if (float64_compare(d0.d, d1.d, &env->fp_status) == 1) set_t(); else clr_t(); } uint64_t helper_fcnvsd_FT_DT(uint32_t t0) { CPU_DoubleU d; CPU_FloatU f; f.l = t0; d.d = float32_to_float64(f.f, &env->fp_status); return d.ll; } uint32_t helper_fcnvds_DT_FT(uint64_t t0) { CPU_DoubleU d; CPU_FloatU f; d.ll = t0; f.f = float64_to_float32(d.d, &env->fp_status); return f.l; } uint32_t helper_fdiv_FT(uint32_t t0, uint32_t t1) { CPU_FloatU f0, f1; f0.l = t0; f1.l = t1; f0.f = float32_div(f0.f, f1.f, &env->fp_status); return f0.l; } uint64_t helper_fdiv_DT(uint64_t t0, uint64_t t1) { CPU_DoubleU d0, d1; d0.ll = t0; d1.ll = t1; d0.d = float64_div(d0.d, d1.d, &env->fp_status); return d0.ll; } uint32_t helper_float_FT(uint32_t t0) { CPU_FloatU f; f.f = int32_to_float32(t0, &env->fp_status); return f.l; } uint64_t helper_float_DT(uint32_t t0) { CPU_DoubleU d; d.d = int32_to_float64(t0, &env->fp_status); return d.ll; } uint32_t helper_fmac_FT(uint32_t t0, uint32_t t1, uint32_t t2) { CPU_FloatU f0, f1, f2; f0.l = t0; f1.l = t1; f2.l = t2; f0.f = float32_mul(f0.f, f1.f, &env->fp_status); f0.f = float32_add(f0.f, f2.f, &env->fp_status); return f0.l; } uint32_t helper_fmul_FT(uint32_t t0, uint32_t t1) { CPU_FloatU f0, f1; f0.l = t0; f1.l = t1; f0.f = float32_mul(f0.f, f1.f, &env->fp_status); return f0.l; } uint64_t helper_fmul_DT(uint64_t t0, uint64_t t1) { CPU_DoubleU d0, d1; d0.ll = t0; d1.ll = t1; d0.d = float64_mul(d0.d, d1.d, &env->fp_status); return d0.ll; } uint32_t helper_fneg_T(uint32_t t0) { CPU_FloatU f; f.l = t0; f.f = float32_chs(f.f); return f.l; } uint32_t helper_fsqrt_FT(uint32_t t0) { CPU_FloatU f; f.l = t0; f.f = float32_sqrt(f.f, &env->fp_status); return f.l; } uint64_t helper_fsqrt_DT(uint64_t t0) { CPU_DoubleU d; d.ll = t0; d.d = float64_sqrt(d.d, &env->fp_status); return d.ll; } uint32_t helper_fsub_FT(uint32_t t0, uint32_t t1) { CPU_FloatU f0, f1; f0.l = t0; f1.l = t1; f0.f = float32_sub(f0.f, f1.f, &env->fp_status); return f0.l; } uint64_t helper_fsub_DT(uint64_t t0, uint64_t t1) { CPU_DoubleU d0, d1; d0.ll = t0; d1.ll = t1; d0.d = float64_sub(d0.d, d1.d, &env->fp_status); return d0.ll; } uint32_t helper_ftrc_FT(uint32_t t0) { CPU_FloatU f; f.l = t0; return float32_to_int32_round_to_zero(f.f, &env->fp_status); } uint32_t helper_ftrc_DT(uint64_t t0) { CPU_DoubleU d; d.ll = t0; return float64_to_int32_round_to_zero(d.d, &env->fp_status); }