| /* |
| * 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]; |
| } |
