/* * Moxie emulation for qemu: main translation routines. * * Copyright (c) 2009, 2013 Anthony Green * * 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 General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ /* For information on the Moxie architecture, see * http://moxielogic.org/wiki */ #include "qemu/osdep.h" #include "cpu.h" #include "exec/exec-all.h" #include "disas/disas.h" #include "tcg-op.h" #include "exec/cpu_ldst.h" #include "exec/helper-proto.h" #include "exec/helper-gen.h" #include "exec/log.h" /* This is the state at translation time. */ typedef struct DisasContext { struct TranslationBlock *tb; target_ulong pc, saved_pc; uint32_t opcode; uint32_t fp_status; /* Routine used to access memory */ int memidx; int bstate; target_ulong btarget; int singlestep_enabled; } 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 */ }; static TCGv cpu_pc; static TCGv cpu_gregs[16]; static TCGv_env cpu_env; static TCGv cc_a, cc_b; #include "exec/gen-icount.h" #define REG(x) (cpu_gregs[x]) /* Extract the signed 10-bit offset from a 16-bit branch instruction. */ static int extract_branch_offset(int opcode) { return (((signed short)((opcode & ((1 << 10) - 1)) << 6)) >> 6) << 1; } void moxie_cpu_dump_state(CPUState *cs, FILE *f, fprintf_function cpu_fprintf, int flags) { MoxieCPU *cpu = MOXIE_CPU(cs); CPUMoxieState *env = &cpu->env; int i; cpu_fprintf(f, "pc=0x%08x\n", env->pc); cpu_fprintf(f, "$fp=0x%08x $sp=0x%08x $r0=0x%08x $r1=0x%08x\n", env->gregs[0], env->gregs[1], env->gregs[2], env->gregs[3]); for (i = 4; i < 16; i += 4) { cpu_fprintf(f, "$r%d=0x%08x $r%d=0x%08x $r%d=0x%08x $r%d=0x%08x\n", i-2, env->gregs[i], i-1, env->gregs[i + 1], i, env->gregs[i + 2], i+1, env->gregs[i + 3]); } for (i = 4; i < 16; i += 4) { cpu_fprintf(f, "sr%d=0x%08x sr%d=0x%08x sr%d=0x%08x sr%d=0x%08x\n", i-2, env->sregs[i], i-1, env->sregs[i + 1], i, env->sregs[i + 2], i+1, env->sregs[i + 3]); } } void moxie_translate_init(void) { int i; static int done_init; static const char * const gregnames[16] = { "$fp", "$sp", "$r0", "$r1", "$r2", "$r3", "$r4", "$r5", "$r6", "$r7", "$r8", "$r9", "$r10", "$r11", "$r12", "$r13" }; if (done_init) { return; } cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env"); tcg_ctx.tcg_env = cpu_env; cpu_pc = tcg_global_mem_new_i32(cpu_env, offsetof(CPUMoxieState, pc), "$pc"); for (i = 0; i < 16; i++) cpu_gregs[i] = tcg_global_mem_new_i32(cpu_env, offsetof(CPUMoxieState, gregs[i]), gregnames[i]); cc_a = tcg_global_mem_new_i32(cpu_env, offsetof(CPUMoxieState, cc_a), "cc_a"); cc_b = tcg_global_mem_new_i32(cpu_env, offsetof(CPUMoxieState, cc_b), "cc_b"); done_init = 1; } static inline bool use_goto_tb(DisasContext *ctx, target_ulong dest) { if (unlikely(ctx->singlestep_enabled)) { return false; } #ifndef CONFIG_USER_ONLY return (ctx->tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK); #else return true; #endif } static inline void gen_goto_tb(CPUMoxieState *env, DisasContext *ctx, int n, target_ulong dest) { if (use_goto_tb(ctx, dest)) { tcg_gen_goto_tb(n); tcg_gen_movi_i32(cpu_pc, dest); tcg_gen_exit_tb((uintptr_t)ctx->tb + n); } else { tcg_gen_movi_i32(cpu_pc, dest); if (ctx->singlestep_enabled) { gen_helper_debug(cpu_env); } tcg_gen_exit_tb(0); } } static int decode_opc(MoxieCPU *cpu, DisasContext *ctx) { CPUMoxieState *env = &cpu->env; /* Local cache for the instruction opcode. */ int opcode; /* Set the default instruction length. */ int length = 2; /* Examine the 16-bit opcode. */ opcode = ctx->opcode; /* Decode instruction. */ if (opcode & (1 << 15)) { if (opcode & (1 << 14)) { /* This is a Form 3 instruction. */ int inst = (opcode >> 10 & 0xf); #define BRANCH(cond) \ do { \ TCGLabel *l1 = gen_new_label(); \ tcg_gen_brcond_i32(cond, cc_a, cc_b, l1); \ gen_goto_tb(env, ctx, 1, ctx->pc+2); \ gen_set_label(l1); \ gen_goto_tb(env, ctx, 0, extract_branch_offset(opcode) + ctx->pc+2); \ ctx->bstate = BS_BRANCH; \ } while (0) switch (inst) { case 0x00: /* beq */ BRANCH(TCG_COND_EQ); break; case 0x01: /* bne */ BRANCH(TCG_COND_NE); break; case 0x02: /* blt */ BRANCH(TCG_COND_LT); break; case 0x03: /* bgt */ BRANCH(TCG_COND_GT); break; case 0x04: /* bltu */ BRANCH(TCG_COND_LTU); break; case 0x05: /* bgtu */ BRANCH(TCG_COND_GTU); break; case 0x06: /* bge */ BRANCH(TCG_COND_GE); break; case 0x07: /* ble */ BRANCH(TCG_COND_LE); break; case 0x08: /* bgeu */ BRANCH(TCG_COND_GEU); break; case 0x09: /* bleu */ BRANCH(TCG_COND_LEU); break; default: { TCGv temp = tcg_temp_new_i32(); tcg_gen_movi_i32(cpu_pc, ctx->pc); tcg_gen_movi_i32(temp, MOXIE_EX_BAD); gen_helper_raise_exception(cpu_env, temp); tcg_temp_free_i32(temp); } break; } } else { /* This is a Form 2 instruction. */ int inst = (opcode >> 12 & 0x3); switch (inst) { case 0x00: /* inc */ { int a = (opcode >> 8) & 0xf; unsigned int v = (opcode & 0xff); tcg_gen_addi_i32(REG(a), REG(a), v); } break; case 0x01: /* dec */ { int a = (opcode >> 8) & 0xf; unsigned int v = (opcode & 0xff); tcg_gen_subi_i32(REG(a), REG(a), v); } break; case 0x02: /* gsr */ { int a = (opcode >> 8) & 0xf; unsigned v = (opcode & 0xff); tcg_gen_ld_i32(REG(a), cpu_env, offsetof(CPUMoxieState, sregs[v])); } break; case 0x03: /* ssr */ { int a = (opcode >> 8) & 0xf; unsigned v = (opcode & 0xff); tcg_gen_st_i32(REG(a), cpu_env, offsetof(CPUMoxieState, sregs[v])); } break; default: { TCGv temp = tcg_temp_new_i32(); tcg_gen_movi_i32(cpu_pc, ctx->pc); tcg_gen_movi_i32(temp, MOXIE_EX_BAD); gen_helper_raise_exception(cpu_env, temp); tcg_temp_free_i32(temp); } break; } } } else { /* This is a Form 1 instruction. */ int inst = opcode >> 8; switch (inst) { case 0x00: /* nop */ break; case 0x01: /* ldi.l (immediate) */ { int reg = (opcode >> 4) & 0xf; int val = cpu_ldl_code(env, ctx->pc+2); tcg_gen_movi_i32(REG(reg), val); length = 6; } break; case 0x02: /* mov (register-to-register) */ { int dest = (opcode >> 4) & 0xf; int src = opcode & 0xf; tcg_gen_mov_i32(REG(dest), REG(src)); } break; case 0x03: /* jsra */ { TCGv t1 = tcg_temp_new_i32(); TCGv t2 = tcg_temp_new_i32(); tcg_gen_movi_i32(t1, ctx->pc + 6); /* Make space for the static chain and return address. */ tcg_gen_subi_i32(t2, REG(1), 8); tcg_gen_mov_i32(REG(1), t2); tcg_gen_qemu_st32(t1, REG(1), ctx->memidx); /* Push the current frame pointer. */ tcg_gen_subi_i32(t2, REG(1), 4); tcg_gen_mov_i32(REG(1), t2); tcg_gen_qemu_st32(REG(0), REG(1), ctx->memidx); /* Set the pc and $fp. */ tcg_gen_mov_i32(REG(0), REG(1)); gen_goto_tb(env, ctx, 0, cpu_ldl_code(env, ctx->pc+2)); tcg_temp_free_i32(t1); tcg_temp_free_i32(t2); ctx->bstate = BS_BRANCH; length = 6; } break; case 0x04: /* ret */ { TCGv t1 = tcg_temp_new_i32(); /* The new $sp is the old $fp. */ tcg_gen_mov_i32(REG(1), REG(0)); /* Pop the frame pointer. */ tcg_gen_qemu_ld32u(REG(0), REG(1), ctx->memidx); tcg_gen_addi_i32(t1, REG(1), 4); tcg_gen_mov_i32(REG(1), t1); /* Pop the return address and skip over the static chain slot. */ tcg_gen_qemu_ld32u(cpu_pc, REG(1), ctx->memidx); tcg_gen_addi_i32(t1, REG(1), 8); tcg_gen_mov_i32(REG(1), t1); tcg_temp_free_i32(t1); /* Jump... */ tcg_gen_exit_tb(0); ctx->bstate = BS_BRANCH; } break; case 0x05: /* add.l */ { int a = (opcode >> 4) & 0xf; int b = opcode & 0xf; tcg_gen_add_i32(REG(a), REG(a), REG(b)); } break; case 0x06: /* push */ { int a = (opcode >> 4) & 0xf; int b = opcode & 0xf; TCGv t1 = tcg_temp_new_i32(); tcg_gen_subi_i32(t1, REG(a), 4); tcg_gen_mov_i32(REG(a), t1); tcg_gen_qemu_st32(REG(b), REG(a), ctx->memidx); tcg_temp_free_i32(t1); } break; case 0x07: /* pop */ { int a = (opcode >> 4) & 0xf; int b = opcode & 0xf; TCGv t1 = tcg_temp_new_i32(); tcg_gen_qemu_ld32u(REG(b), REG(a), ctx->memidx); tcg_gen_addi_i32(t1, REG(a), 4); tcg_gen_mov_i32(REG(a), t1); tcg_temp_free_i32(t1); } break; case 0x08: /* lda.l */ { int reg = (opcode >> 4) & 0xf; TCGv ptr = tcg_temp_new_i32(); tcg_gen_movi_i32(ptr, cpu_ldl_code(env, ctx->pc+2)); tcg_gen_qemu_ld32u(REG(reg), ptr, ctx->memidx); tcg_temp_free_i32(ptr); length = 6; } break; case 0x09: /* sta.l */ { int val = (opcode >> 4) & 0xf; TCGv ptr = tcg_temp_new_i32(); tcg_gen_movi_i32(ptr, cpu_ldl_code(env, ctx->pc+2)); tcg_gen_qemu_st32(REG(val), ptr, ctx->memidx); tcg_temp_free_i32(ptr); length = 6; } break; case 0x0a: /* ld.l (register indirect) */ { int src = opcode & 0xf; int dest = (opcode >> 4) & 0xf; tcg_gen_qemu_ld32u(REG(dest), REG(src), ctx->memidx); } break; case 0x0b: /* st.l */ { int dest = (opcode >> 4) & 0xf; int val = opcode & 0xf; tcg_gen_qemu_st32(REG(val), REG(dest), ctx->memidx); } break; case 0x0c: /* ldo.l */ { int a = (opcode >> 4) & 0xf; int b = opcode & 0xf; TCGv t1 = tcg_temp_new_i32(); TCGv t2 = tcg_temp_new_i32(); tcg_gen_addi_i32(t1, REG(b), cpu_ldl_code(env, ctx->pc+2)); tcg_gen_qemu_ld32u(t2, t1, ctx->memidx); tcg_gen_mov_i32(REG(a), t2); tcg_temp_free_i32(t1); tcg_temp_free_i32(t2); length = 6; } break; case 0x0d: /* sto.l */ { int a = (opcode >> 4) & 0xf; int b = opcode & 0xf; TCGv t1 = tcg_temp_new_i32(); TCGv t2 = tcg_temp_new_i32(); tcg_gen_addi_i32(t1, REG(a), cpu_ldl_code(env, ctx->pc+2)); tcg_gen_qemu_st32(REG(b), t1, ctx->memidx); tcg_temp_free_i32(t1); tcg_temp_free_i32(t2); length = 6; } break; case 0x0e: /* cmp */ { int a = (opcode >> 4) & 0xf; int b = opcode & 0xf; tcg_gen_mov_i32(cc_a, REG(a)); tcg_gen_mov_i32(cc_b, REG(b)); } break; case 0x19: /* jsr */ { int fnreg = (opcode >> 4) & 0xf; /* Load the stack pointer into T0. */ TCGv t1 = tcg_temp_new_i32(); TCGv t2 = tcg_temp_new_i32(); tcg_gen_movi_i32(t1, ctx->pc+2); /* Make space for the static chain and return address. */ tcg_gen_subi_i32(t2, REG(1), 8); tcg_gen_mov_i32(REG(1), t2); tcg_gen_qemu_st32(t1, REG(1), ctx->memidx); /* Push the current frame pointer. */ tcg_gen_subi_i32(t2, REG(1), 4); tcg_gen_mov_i32(REG(1), t2); tcg_gen_qemu_st32(REG(0), REG(1), ctx->memidx); /* Set the pc and $fp. */ tcg_gen_mov_i32(REG(0), REG(1)); tcg_gen_mov_i32(cpu_pc, REG(fnreg)); tcg_temp_free_i32(t1); tcg_temp_free_i32(t2); tcg_gen_exit_tb(0); ctx->bstate = BS_BRANCH; } break; case 0x1a: /* jmpa */ { tcg_gen_movi_i32(cpu_pc, cpu_ldl_code(env, ctx->pc+2)); tcg_gen_exit_tb(0); ctx->bstate = BS_BRANCH; length = 6; } break; case 0x1b: /* ldi.b (immediate) */ { int reg = (opcode >> 4) & 0xf; int val = cpu_ldl_code(env, ctx->pc+2); tcg_gen_movi_i32(REG(reg), val); length = 6; } break; case 0x1c: /* ld.b (register indirect) */ { int src = opcode & 0xf; int dest = (opcode >> 4) & 0xf; tcg_gen_qemu_ld8u(REG(dest), REG(src), ctx->memidx); } break; case 0x1d: /* lda.b */ { int reg = (opcode >> 4) & 0xf; TCGv ptr = tcg_temp_new_i32(); tcg_gen_movi_i32(ptr, cpu_ldl_code(env, ctx->pc+2)); tcg_gen_qemu_ld8u(REG(reg), ptr, ctx->memidx); tcg_temp_free_i32(ptr); length = 6; } break; case 0x1e: /* st.b */ { int dest = (opcode >> 4) & 0xf; int val = opcode & 0xf; tcg_gen_qemu_st8(REG(val), REG(dest), ctx->memidx); } break; case 0x1f: /* sta.b */ { int val = (opcode >> 4) & 0xf; TCGv ptr = tcg_temp_new_i32(); tcg_gen_movi_i32(ptr, cpu_ldl_code(env, ctx->pc+2)); tcg_gen_qemu_st8(REG(val), ptr, ctx->memidx); tcg_temp_free_i32(ptr); length = 6; } break; case 0x20: /* ldi.s (immediate) */ { int reg = (opcode >> 4) & 0xf; int val = cpu_ldl_code(env, ctx->pc+2); tcg_gen_movi_i32(REG(reg), val); length = 6; } break; case 0x21: /* ld.s (register indirect) */ { int src = opcode & 0xf; int dest = (opcode >> 4) & 0xf; tcg_gen_qemu_ld16u(REG(dest), REG(src), ctx->memidx); } break; case 0x22: /* lda.s */ { int reg = (opcode >> 4) & 0xf; TCGv ptr = tcg_temp_new_i32(); tcg_gen_movi_i32(ptr, cpu_ldl_code(env, ctx->pc+2)); tcg_gen_qemu_ld16u(REG(reg), ptr, ctx->memidx); tcg_temp_free_i32(ptr); length = 6; } break; case 0x23: /* st.s */ { int dest = (opcode >> 4) & 0xf; int val = opcode & 0xf; tcg_gen_qemu_st16(REG(val), REG(dest), ctx->memidx); } break; case 0x24: /* sta.s */ { int val = (opcode >> 4) & 0xf; TCGv ptr = tcg_temp_new_i32(); tcg_gen_movi_i32(ptr, cpu_ldl_code(env, ctx->pc+2)); tcg_gen_qemu_st16(REG(val), ptr, ctx->memidx); tcg_temp_free_i32(ptr); length = 6; } break; case 0x25: /* jmp */ { int reg = (opcode >> 4) & 0xf; tcg_gen_mov_i32(cpu_pc, REG(reg)); tcg_gen_exit_tb(0); ctx->bstate = BS_BRANCH; } break; case 0x26: /* and */ { int a = (opcode >> 4) & 0xf; int b = opcode & 0xf; tcg_gen_and_i32(REG(a), REG(a), REG(b)); } break; case 0x27: /* lshr */ { int a = (opcode >> 4) & 0xf; int b = opcode & 0xf; TCGv sv = tcg_temp_new_i32(); tcg_gen_andi_i32(sv, REG(b), 0x1f); tcg_gen_shr_i32(REG(a), REG(a), sv); tcg_temp_free_i32(sv); } break; case 0x28: /* ashl */ { int a = (opcode >> 4) & 0xf; int b = opcode & 0xf; TCGv sv = tcg_temp_new_i32(); tcg_gen_andi_i32(sv, REG(b), 0x1f); tcg_gen_shl_i32(REG(a), REG(a), sv); tcg_temp_free_i32(sv); } break; case 0x29: /* sub.l */ { int a = (opcode >> 4) & 0xf; int b = opcode & 0xf; tcg_gen_sub_i32(REG(a), REG(a), REG(b)); } break; case 0x2a: /* neg */ { int a = (opcode >> 4) & 0xf; int b = opcode & 0xf; tcg_gen_neg_i32(REG(a), REG(b)); } break; case 0x2b: /* or */ { int a = (opcode >> 4) & 0xf; int b = opcode & 0xf; tcg_gen_or_i32(REG(a), REG(a), REG(b)); } break; case 0x2c: /* not */ { int a = (opcode >> 4) & 0xf; int b = opcode & 0xf; tcg_gen_not_i32(REG(a), REG(b)); } break; case 0x2d: /* ashr */ { int a = (opcode >> 4) & 0xf; int b = opcode & 0xf; TCGv sv = tcg_temp_new_i32(); tcg_gen_andi_i32(sv, REG(b), 0x1f); tcg_gen_sar_i32(REG(a), REG(a), sv); tcg_temp_free_i32(sv); } break; case 0x2e: /* xor */ { int a = (opcode >> 4) & 0xf; int b = opcode & 0xf; tcg_gen_xor_i32(REG(a), REG(a), REG(b)); } break; case 0x2f: /* mul.l */ { int a = (opcode >> 4) & 0xf; int b = opcode & 0xf; tcg_gen_mul_i32(REG(a), REG(a), REG(b)); } break; case 0x30: /* swi */ { int val = cpu_ldl_code(env, ctx->pc+2); TCGv temp = tcg_temp_new_i32(); tcg_gen_movi_i32(temp, val); tcg_gen_st_i32(temp, cpu_env, offsetof(CPUMoxieState, sregs[3])); tcg_gen_movi_i32(cpu_pc, ctx->pc); tcg_gen_movi_i32(temp, MOXIE_EX_SWI); gen_helper_raise_exception(cpu_env, temp); tcg_temp_free_i32(temp); length = 6; } break; case 0x31: /* div.l */ { int a = (opcode >> 4) & 0xf; int b = opcode & 0xf; tcg_gen_movi_i32(cpu_pc, ctx->pc); gen_helper_div(REG(a), cpu_env, REG(a), REG(b)); } break; case 0x32: /* udiv.l */ { int a = (opcode >> 4) & 0xf; int b = opcode & 0xf; tcg_gen_movi_i32(cpu_pc, ctx->pc); gen_helper_udiv(REG(a), cpu_env, REG(a), REG(b)); } break; case 0x33: /* mod.l */ { int a = (opcode >> 4) & 0xf; int b = opcode & 0xf; tcg_gen_rem_i32(REG(a), REG(a), REG(b)); } break; case 0x34: /* umod.l */ { int a = (opcode >> 4) & 0xf; int b = opcode & 0xf; tcg_gen_remu_i32(REG(a), REG(a), REG(b)); } break; case 0x35: /* brk */ { TCGv temp = tcg_temp_new_i32(); tcg_gen_movi_i32(cpu_pc, ctx->pc); tcg_gen_movi_i32(temp, MOXIE_EX_BREAK); gen_helper_raise_exception(cpu_env, temp); tcg_temp_free_i32(temp); } break; case 0x36: /* ldo.b */ { int a = (opcode >> 4) & 0xf; int b = opcode & 0xf; TCGv t1 = tcg_temp_new_i32(); TCGv t2 = tcg_temp_new_i32(); tcg_gen_addi_i32(t1, REG(b), cpu_ldl_code(env, ctx->pc+2)); tcg_gen_qemu_ld8u(t2, t1, ctx->memidx); tcg_gen_mov_i32(REG(a), t2); tcg_temp_free_i32(t1); tcg_temp_free_i32(t2); length = 6; } break; case 0x37: /* sto.b */ { int a = (opcode >> 4) & 0xf; int b = opcode & 0xf; TCGv t1 = tcg_temp_new_i32(); TCGv t2 = tcg_temp_new_i32(); tcg_gen_addi_i32(t1, REG(a), cpu_ldl_code(env, ctx->pc+2)); tcg_gen_qemu_st8(REG(b), t1, ctx->memidx); tcg_temp_free_i32(t1); tcg_temp_free_i32(t2); length = 6; } break; case 0x38: /* ldo.s */ { int a = (opcode >> 4) & 0xf; int b = opcode & 0xf; TCGv t1 = tcg_temp_new_i32(); TCGv t2 = tcg_temp_new_i32(); tcg_gen_addi_i32(t1, REG(b), cpu_ldl_code(env, ctx->pc+2)); tcg_gen_qemu_ld16u(t2, t1, ctx->memidx); tcg_gen_mov_i32(REG(a), t2); tcg_temp_free_i32(t1); tcg_temp_free_i32(t2); length = 6; } break; case 0x39: /* sto.s */ { int a = (opcode >> 4) & 0xf; int b = opcode & 0xf; TCGv t1 = tcg_temp_new_i32(); TCGv t2 = tcg_temp_new_i32(); tcg_gen_addi_i32(t1, REG(a), cpu_ldl_code(env, ctx->pc+2)); tcg_gen_qemu_st16(REG(b), t1, ctx->memidx); tcg_temp_free_i32(t1); tcg_temp_free_i32(t2); length = 6; } break; default: { TCGv temp = tcg_temp_new_i32(); tcg_gen_movi_i32(cpu_pc, ctx->pc); tcg_gen_movi_i32(temp, MOXIE_EX_BAD); gen_helper_raise_exception(cpu_env, temp); tcg_temp_free_i32(temp); } break; } } return length; } /* generate intermediate code for basic block 'tb'. */ void gen_intermediate_code(CPUMoxieState *env, struct TranslationBlock *tb) { MoxieCPU *cpu = moxie_env_get_cpu(env); CPUState *cs = CPU(cpu); DisasContext ctx; target_ulong pc_start; int num_insns, max_insns; pc_start = tb->pc; ctx.pc = pc_start; ctx.saved_pc = -1; ctx.tb = tb; ctx.memidx = 0; ctx.singlestep_enabled = 0; ctx.bstate = BS_NONE; num_insns = 0; max_insns = tb->cflags & CF_COUNT_MASK; if (max_insns == 0) { max_insns = CF_COUNT_MASK; } if (max_insns > TCG_MAX_INSNS) { max_insns = TCG_MAX_INSNS; } gen_tb_start(tb); do { tcg_gen_insn_start(ctx.pc); num_insns++; if (unlikely(cpu_breakpoint_test(cs, ctx.pc, BP_ANY))) { tcg_gen_movi_i32(cpu_pc, ctx.pc); gen_helper_debug(cpu_env); ctx.bstate = BS_EXCP; /* The address covered by the breakpoint must be included in [tb->pc, tb->pc + tb->size) in order to for it to be properly cleared -- thus we increment the PC here so that the logic setting tb->size below does the right thing. */ ctx.pc += 2; goto done_generating; } ctx.opcode = cpu_lduw_code(env, ctx.pc); ctx.pc += decode_opc(cpu, &ctx); if (num_insns >= max_insns) { break; } if (cs->singlestep_enabled) { break; } if ((ctx.pc & (TARGET_PAGE_SIZE - 1)) == 0) { break; } } while (ctx.bstate == BS_NONE && !tcg_op_buf_full()); if (cs->singlestep_enabled) { tcg_gen_movi_tl(cpu_pc, ctx.pc); gen_helper_debug(cpu_env); } else { switch (ctx.bstate) { case BS_STOP: case BS_NONE: gen_goto_tb(env, &ctx, 0, ctx.pc); break; case BS_EXCP: tcg_gen_exit_tb(0); break; case BS_BRANCH: default: break; } } done_generating: gen_tb_end(tb, num_insns); tb->size = ctx.pc - pc_start; tb->icount = num_insns; } void restore_state_to_opc(CPUMoxieState *env, TranslationBlock *tb, target_ulong *data) { env->pc = data[0]; }