root / target-mips / translate.c @ 6af0bf9c
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/*
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* MIPS32 emulation for qemu: main translation routines.
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*
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* Copyright (c) 2004-2005 Jocelyn Mayer
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <stdarg.h> |
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include <inttypes.h> |
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#include "cpu.h" |
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#include "exec-all.h" |
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#include "disas.h" |
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#define MIPS_DEBUG_DISAS
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//#define MIPS_SINGLE_STEP
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enum {
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#define DEF(s, n, copy_size) INDEX_op_ ## s, |
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#include "opc.h" |
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#undef DEF
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NB_OPS, |
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}; |
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static uint16_t *gen_opc_ptr;
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static uint32_t *gen_opparam_ptr;
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#include "gen-op.h" |
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|
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const unsigned char *regnames[] = |
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{ "r0", "at", "v0", "v1", "a0", "a1", "a2", "a3",
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"t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7", |
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"s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7", |
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"t8", "t9", "k0", "k1", "gp", "sp", "s8", "ra", }; |
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|
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/* Warning: no function for r0 register (hard wired to zero) */
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#define GEN32(func, NAME) \
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static GenOpFunc *NAME ## _table [32] = { \ |
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NULL, NAME ## 1, NAME ## 2, NAME ## 3, \ |
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NAME ## 4, NAME ## 5, NAME ## 6, NAME ## 7, \ |
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NAME ## 8, NAME ## 9, NAME ## 10, NAME ## 11, \ |
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NAME ## 12, NAME ## 13, NAME ## 14, NAME ## 15, \ |
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NAME ## 16, NAME ## 17, NAME ## 18, NAME ## 19, \ |
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NAME ## 20, NAME ## 21, NAME ## 22, NAME ## 23, \ |
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NAME ## 24, NAME ## 25, NAME ## 26, NAME ## 27, \ |
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NAME ## 28, NAME ## 29, NAME ## 30, NAME ## 31, \ |
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}; \ |
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static inline void func(int n) \ |
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{ \
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NAME ## _table[n](); \ |
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} |
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/* General purpose registers moves */
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GEN32(gen_op_load_gpr_T0, gen_op_load_gpr_T0_gpr); |
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GEN32(gen_op_load_gpr_T1, gen_op_load_gpr_T1_gpr); |
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GEN32(gen_op_load_gpr_T2, gen_op_load_gpr_T2_gpr); |
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|
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GEN32(gen_op_store_T0_gpr, gen_op_store_T0_gpr_gpr); |
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GEN32(gen_op_store_T1_gpr, gen_op_store_T1_gpr_gpr); |
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typedef struct DisasContext { |
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struct TranslationBlock *tb;
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target_ulong pc, saved_pc; |
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uint32_t opcode; |
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/* Routine used to access memory */
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int mem_idx;
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uint32_t hflags, saved_hflags; |
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uint32_t CP0_Status; |
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int bstate;
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target_ulong btarget; |
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} DisasContext; |
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enum {
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BS_NONE = 0, /* We go out of the TB without reaching a branch or an |
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* exception condition
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*/
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BS_STOP = 1, /* We want to stop translation for any reason */ |
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BS_BRANCH = 2, /* We reached a branch condition */ |
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BS_EXCP = 3, /* We reached an exception condition */ |
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}; |
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#if defined MIPS_DEBUG_DISAS
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#define MIPS_DEBUG(fmt, args...) \
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do { \
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if (loglevel & CPU_LOG_TB_IN_ASM) { \
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fprintf(logfile, "%08x: %08x " fmt "\n", \ |
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ctx->pc, ctx->opcode , ##args); \ |
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} \ |
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} while (0) |
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#else
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#define MIPS_DEBUG(fmt, args...) do { } while(0) |
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#endif
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#define MIPS_INVAL(op) \
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do { \
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MIPS_DEBUG("Invalid %s %03x %03x %03x", op, ctx->opcode >> 26, \ |
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ctx->opcode & 0x3F, ((ctx->opcode >> 16) & 0x1F)); \ |
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} while (0) |
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#define GEN_LOAD_REG_TN(Tn, Rn) \
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do { \
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if (Rn == 0) { \ |
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glue(gen_op_reset_, Tn)(); \ |
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} else { \
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glue(gen_op_load_gpr_, Tn)(Rn); \ |
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} \ |
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} while (0) |
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#define GEN_LOAD_IMM_TN(Tn, Imm) \
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do { \
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if (Imm == 0) { \ |
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glue(gen_op_reset_, Tn)(); \ |
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} else { \
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glue(gen_op_set_, Tn)(Imm); \ |
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} \ |
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} while (0) |
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#define GEN_STORE_TN_REG(Rn, Tn) \
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do { \
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if (Rn != 0) { \ |
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glue(glue(gen_op_store_, Tn),_gpr)(Rn); \ |
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} \ |
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} while (0) |
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static inline void save_cpu_state (DisasContext *ctx, int do_save_pc) |
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{
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#if defined MIPS_DEBUG_DISAS
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if (loglevel & CPU_LOG_TB_IN_ASM) {
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fprintf(logfile, "hflags %08x saved %08x\n",
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ctx->hflags, ctx->saved_hflags); |
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} |
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#endif
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if (do_save_pc && ctx->pc != ctx->saved_pc) {
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gen_op_save_pc(ctx->pc); |
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ctx->saved_pc = ctx->pc; |
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} |
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if (ctx->hflags != ctx->saved_hflags) {
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gen_op_save_state(ctx->hflags); |
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ctx->saved_hflags = ctx->hflags; |
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if (ctx->hflags & MIPS_HFLAG_BR) {
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gen_op_save_breg_target(); |
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} else if (ctx->hflags & MIPS_HFLAG_B) { |
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gen_op_save_btarget(ctx->btarget); |
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} else if (ctx->hflags & MIPS_HFLAG_BMASK) { |
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gen_op_save_bcond(); |
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gen_op_save_btarget(ctx->btarget); |
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} |
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} |
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} |
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static inline void generate_exception (DisasContext *ctx, int excp) |
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{
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#if defined MIPS_DEBUG_DISAS
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if (loglevel & CPU_LOG_TB_IN_ASM)
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fprintf(logfile, "%s: raise exception %d\n", __func__, excp);
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#endif
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save_cpu_state(ctx, 1);
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gen_op_raise_exception(excp); |
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ctx->bstate = BS_EXCP; |
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} |
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#if defined(CONFIG_USER_ONLY)
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#define op_ldst(name) gen_op_##name##_raw() |
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#define OP_LD_TABLE(width)
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#define OP_ST_TABLE(width)
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#else
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#define op_ldst(name) (*gen_op_##name[ctx->mem_idx])() |
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#define OP_LD_TABLE(width) \
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static GenOpFunc *gen_op_l##width[] = { \ |
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&gen_op_l##width##_user, \ |
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&gen_op_l##width##_kernel, \ |
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} |
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#define OP_ST_TABLE(width) \
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static GenOpFunc *gen_op_s##width[] = { \ |
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&gen_op_s##width##_user, \ |
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&gen_op_s##width##_kernel, \ |
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} |
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#endif
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#ifdef TARGET_MIPS64
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OP_LD_TABLE(d); |
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OP_LD_TABLE(dl); |
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OP_LD_TABLE(dr); |
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OP_ST_TABLE(d); |
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OP_ST_TABLE(dl); |
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OP_ST_TABLE(dr); |
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#endif
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OP_LD_TABLE(w); |
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OP_LD_TABLE(wl); |
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OP_LD_TABLE(wr); |
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OP_ST_TABLE(w); |
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OP_ST_TABLE(wl); |
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OP_ST_TABLE(wr); |
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OP_LD_TABLE(h); |
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OP_LD_TABLE(hu); |
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OP_ST_TABLE(h); |
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OP_LD_TABLE(b); |
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OP_LD_TABLE(bu); |
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OP_ST_TABLE(b); |
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OP_LD_TABLE(l); |
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OP_ST_TABLE(c); |
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|
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/* Load and store */
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static void gen_ldst (DisasContext *ctx, uint16_t opc, int rt, |
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int base, int16_t offset)
|
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{
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const unsigned char *opn = "unk"; |
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|
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if (base == 0) { |
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GEN_LOAD_IMM_TN(T0, offset); |
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} else if (offset == 0) { |
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gen_op_load_gpr_T0(base); |
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} else {
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gen_op_load_gpr_T0(base); |
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gen_op_set_T1(offset); |
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gen_op_add(); |
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} |
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/* Don't do NOP if destination is zero: we must perform the actual
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* memory access
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*/
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switch (opc) {
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#if defined(TARGET_MIPS64)
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case OPC_LD:
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#if defined (MIPS_HAS_UNALIGNED_LS)
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case OPC_ULD:
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#endif
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op_ldst(ld); |
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GEN_STORE_TN_REG(rt, T0); |
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opn = "ld";
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break;
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case OPC_SD:
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#if defined (MIPS_HAS_UNALIGNED_LS)
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case OPC_USD:
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#endif
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GEN_LOAD_REG_TN(T1, rt); |
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op_ldst(sd); |
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opn = "sd";
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break;
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case OPC_LDL:
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op_ldst(ldl); |
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GEN_STORE_TN_REG(rt, T0); |
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opn = "ldl";
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break;
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case OPC_SDL:
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GEN_LOAD_REG_TN(T1, rt); |
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op_ldst(sdl); |
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opn = "sdl";
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break;
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case OPC_LDR:
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op_ldst(ldr); |
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GEN_STORE_TN_REG(rt, T0); |
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opn = "ldr";
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break;
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case OPC_SDR:
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GEN_LOAD_REG_TN(T1, rt); |
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op_ldst(sdr); |
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opn = "sdr";
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break;
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#endif
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case OPC_LW:
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#if defined (MIPS_HAS_UNALIGNED_LS)
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case OPC_ULW:
|
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#endif
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op_ldst(lw); |
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GEN_STORE_TN_REG(rt, T0); |
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opn = "lw";
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break;
|
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case OPC_SW:
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#if defined (MIPS_HAS_UNALIGNED_LS)
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case OPC_USW:
|
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#endif
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GEN_LOAD_REG_TN(T1, rt); |
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op_ldst(sw); |
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opn = "sw";
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break;
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case OPC_LH:
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#if defined (MIPS_HAS_UNALIGNED_LS)
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case OPC_ULH:
|
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#endif
|
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op_ldst(lh); |
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GEN_STORE_TN_REG(rt, T0); |
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opn = "lh";
|
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break;
|
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case OPC_SH:
|
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#if defined (MIPS_HAS_UNALIGNED_LS)
|
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case OPC_USH:
|
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#endif
|
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GEN_LOAD_REG_TN(T1, rt); |
| 305 |
op_ldst(sh); |
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opn = "sh";
|
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break;
|
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case OPC_LHU:
|
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#if defined (MIPS_HAS_UNALIGNED_LS)
|
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case OPC_ULHU:
|
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#endif
|
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op_ldst(lhu); |
| 313 |
GEN_STORE_TN_REG(rt, T0); |
| 314 |
opn = "lhu";
|
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break;
|
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case OPC_LB:
|
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op_ldst(lb); |
| 318 |
GEN_STORE_TN_REG(rt, T0); |
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opn = "lb";
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break;
|
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case OPC_SB:
|
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GEN_LOAD_REG_TN(T1, rt); |
| 323 |
op_ldst(sb); |
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opn = "sb";
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break;
|
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case OPC_LBU:
|
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op_ldst(lbu); |
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GEN_STORE_TN_REG(rt, T0); |
| 329 |
opn = "lbu";
|
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break;
|
| 331 |
case OPC_LWL:
|
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op_ldst(lwl); |
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GEN_STORE_TN_REG(rt, T0); |
| 334 |
opn = "lwl";
|
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break;
|
| 336 |
case OPC_SWL:
|
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GEN_LOAD_REG_TN(T1, rt); |
| 338 |
op_ldst(swl); |
| 339 |
opn = "swr";
|
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break;
|
| 341 |
case OPC_LWR:
|
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op_ldst(lwr); |
| 343 |
GEN_STORE_TN_REG(rt, T0); |
| 344 |
opn = "lwr";
|
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break;
|
| 346 |
case OPC_SWR:
|
| 347 |
GEN_LOAD_REG_TN(T1, rt); |
| 348 |
op_ldst(swr); |
| 349 |
opn = "swr";
|
| 350 |
break;
|
| 351 |
case OPC_LL:
|
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op_ldst(ll); |
| 353 |
GEN_STORE_TN_REG(rt, T0); |
| 354 |
opn = "ll";
|
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break;
|
| 356 |
case OPC_SC:
|
| 357 |
GEN_LOAD_REG_TN(T1, rt); |
| 358 |
op_ldst(sc); |
| 359 |
GEN_STORE_TN_REG(rt, T0); |
| 360 |
opn = "sc";
|
| 361 |
break;
|
| 362 |
default:
|
| 363 |
MIPS_INVAL("load/store");
|
| 364 |
generate_exception(ctx, EXCP_RI); |
| 365 |
return;
|
| 366 |
} |
| 367 |
MIPS_DEBUG("%s %s, %d(%s)", opn, regnames[rt], offset, regnames[base]);
|
| 368 |
} |
| 369 |
|
| 370 |
/* Arithmetic with immediate operand */
|
| 371 |
static void gen_arith_imm (DisasContext *ctx, uint16_t opc, int rt, |
| 372 |
int rs, int16_t imm)
|
| 373 |
{
|
| 374 |
uint32_t uimm; |
| 375 |
const unsigned char *opn = "unk"; |
| 376 |
|
| 377 |
if (rt == 0 && opc != OPC_ADDI) { |
| 378 |
/* if no destination, treat it as a NOP
|
| 379 |
* For addi, we must generate the overflow exception when needed.
|
| 380 |
*/
|
| 381 |
MIPS_DEBUG("NOP");
|
| 382 |
return;
|
| 383 |
} |
| 384 |
if (opc == OPC_ADDI || opc == OPC_ADDIU ||
|
| 385 |
opc == OPC_SLTI || opc == OPC_SLTIU) |
| 386 |
uimm = (int32_t)imm; /* Sign extent to 32 bits */
|
| 387 |
else
|
| 388 |
uimm = (uint16_t)imm; |
| 389 |
if (opc != OPC_LUI) {
|
| 390 |
GEN_LOAD_REG_TN(T0, rs); |
| 391 |
GEN_LOAD_IMM_TN(T1, uimm); |
| 392 |
} else {
|
| 393 |
uimm = uimm << 16;
|
| 394 |
GEN_LOAD_IMM_TN(T0, uimm); |
| 395 |
} |
| 396 |
switch (opc) {
|
| 397 |
case OPC_ADDI:
|
| 398 |
save_cpu_state(ctx, 1);
|
| 399 |
gen_op_addo(); |
| 400 |
opn = "addi";
|
| 401 |
break;
|
| 402 |
case OPC_ADDIU:
|
| 403 |
gen_op_add(); |
| 404 |
opn = "addiu";
|
| 405 |
break;
|
| 406 |
case OPC_SLTI:
|
| 407 |
gen_op_lt(); |
| 408 |
opn = "slti";
|
| 409 |
break;
|
| 410 |
case OPC_SLTIU:
|
| 411 |
gen_op_ltu(); |
| 412 |
opn = "sltiu";
|
| 413 |
break;
|
| 414 |
case OPC_ANDI:
|
| 415 |
gen_op_and(); |
| 416 |
opn = "andi";
|
| 417 |
break;
|
| 418 |
case OPC_ORI:
|
| 419 |
gen_op_or(); |
| 420 |
opn = "ori";
|
| 421 |
break;
|
| 422 |
case OPC_XORI:
|
| 423 |
gen_op_xor(); |
| 424 |
opn = "xori";
|
| 425 |
break;
|
| 426 |
case OPC_LUI:
|
| 427 |
opn = "lui";
|
| 428 |
break;
|
| 429 |
case OPC_SLL:
|
| 430 |
gen_op_sll(); |
| 431 |
opn = "sll";
|
| 432 |
break;
|
| 433 |
case OPC_SRA:
|
| 434 |
gen_op_sra(); |
| 435 |
opn = "sra";
|
| 436 |
break;
|
| 437 |
case OPC_SRL:
|
| 438 |
gen_op_srl(); |
| 439 |
opn = "srl";
|
| 440 |
break;
|
| 441 |
default:
|
| 442 |
MIPS_INVAL("imm arith");
|
| 443 |
generate_exception(ctx, EXCP_RI); |
| 444 |
return;
|
| 445 |
} |
| 446 |
GEN_STORE_TN_REG(rt, T0); |
| 447 |
MIPS_DEBUG("%s %s, %s, %x", opn, regnames[rt], regnames[rs], uimm);
|
| 448 |
} |
| 449 |
|
| 450 |
/* Arithmetic */
|
| 451 |
static void gen_arith (DisasContext *ctx, uint16_t opc, |
| 452 |
int rd, int rs, int rt) |
| 453 |
{
|
| 454 |
const unsigned char *opn = "unk"; |
| 455 |
|
| 456 |
if (rd == 0 && opc != OPC_ADD && opc != OPC_SUB) { |
| 457 |
/* if no destination, treat it as a NOP
|
| 458 |
* For add & sub, we must generate the overflow exception when needed.
|
| 459 |
*/
|
| 460 |
MIPS_DEBUG("NOP");
|
| 461 |
return;
|
| 462 |
} |
| 463 |
GEN_LOAD_REG_TN(T0, rs); |
| 464 |
GEN_LOAD_REG_TN(T1, rt); |
| 465 |
switch (opc) {
|
| 466 |
case OPC_ADD:
|
| 467 |
save_cpu_state(ctx, 1);
|
| 468 |
gen_op_addo(); |
| 469 |
opn = "add";
|
| 470 |
break;
|
| 471 |
case OPC_ADDU:
|
| 472 |
gen_op_add(); |
| 473 |
opn = "addu";
|
| 474 |
break;
|
| 475 |
case OPC_SUB:
|
| 476 |
save_cpu_state(ctx, 1);
|
| 477 |
gen_op_subo(); |
| 478 |
opn = "sub";
|
| 479 |
break;
|
| 480 |
case OPC_SUBU:
|
| 481 |
gen_op_sub(); |
| 482 |
opn = "subu";
|
| 483 |
break;
|
| 484 |
case OPC_SLT:
|
| 485 |
gen_op_lt(); |
| 486 |
opn = "slt";
|
| 487 |
break;
|
| 488 |
case OPC_SLTU:
|
| 489 |
gen_op_ltu(); |
| 490 |
opn = "sltu";
|
| 491 |
break;
|
| 492 |
case OPC_AND:
|
| 493 |
gen_op_and(); |
| 494 |
opn = "and";
|
| 495 |
break;
|
| 496 |
case OPC_NOR:
|
| 497 |
gen_op_nor(); |
| 498 |
opn = "nor";
|
| 499 |
break;
|
| 500 |
case OPC_OR:
|
| 501 |
gen_op_or(); |
| 502 |
opn = "or";
|
| 503 |
break;
|
| 504 |
case OPC_XOR:
|
| 505 |
gen_op_xor(); |
| 506 |
opn = "xor";
|
| 507 |
break;
|
| 508 |
case OPC_MUL:
|
| 509 |
gen_op_mul(); |
| 510 |
opn = "mul";
|
| 511 |
break;
|
| 512 |
case OPC_MOVN:
|
| 513 |
gen_op_movn(rd); |
| 514 |
opn = "movn";
|
| 515 |
goto print;
|
| 516 |
case OPC_MOVZ:
|
| 517 |
gen_op_movz(rd); |
| 518 |
opn = "movz";
|
| 519 |
goto print;
|
| 520 |
case OPC_SLLV:
|
| 521 |
gen_op_sllv(); |
| 522 |
opn = "sllv";
|
| 523 |
break;
|
| 524 |
case OPC_SRAV:
|
| 525 |
gen_op_srav(); |
| 526 |
opn = "srav";
|
| 527 |
break;
|
| 528 |
case OPC_SRLV:
|
| 529 |
gen_op_srlv(); |
| 530 |
opn = "srlv";
|
| 531 |
break;
|
| 532 |
default:
|
| 533 |
MIPS_INVAL("arith");
|
| 534 |
generate_exception(ctx, EXCP_RI); |
| 535 |
return;
|
| 536 |
} |
| 537 |
GEN_STORE_TN_REG(rd, T0); |
| 538 |
print:
|
| 539 |
MIPS_DEBUG("%s %s, %s, %s", opn, regnames[rd], regnames[rs], regnames[rt]);
|
| 540 |
} |
| 541 |
|
| 542 |
/* Arithmetic on HI/LO registers */
|
| 543 |
static void gen_HILO (DisasContext *ctx, uint16_t opc, int reg) |
| 544 |
{
|
| 545 |
const unsigned char *opn = "unk"; |
| 546 |
|
| 547 |
if (reg == 0 && (opc == OPC_MFHI || opc == OPC_MFLO)) { |
| 548 |
/* Treat as a NOP */
|
| 549 |
MIPS_DEBUG("NOP");
|
| 550 |
return;
|
| 551 |
} |
| 552 |
switch (opc) {
|
| 553 |
case OPC_MFHI:
|
| 554 |
gen_op_load_HI(); |
| 555 |
GEN_STORE_TN_REG(reg, T0); |
| 556 |
opn = "mfhi";
|
| 557 |
break;
|
| 558 |
case OPC_MFLO:
|
| 559 |
gen_op_load_LO(); |
| 560 |
GEN_STORE_TN_REG(reg, T0); |
| 561 |
opn = "mflo";
|
| 562 |
break;
|
| 563 |
case OPC_MTHI:
|
| 564 |
GEN_LOAD_REG_TN(T0, reg); |
| 565 |
gen_op_store_HI(); |
| 566 |
opn = "mthi";
|
| 567 |
break;
|
| 568 |
case OPC_MTLO:
|
| 569 |
GEN_LOAD_REG_TN(T0, reg); |
| 570 |
gen_op_store_LO(); |
| 571 |
opn = "mtlo";
|
| 572 |
break;
|
| 573 |
default:
|
| 574 |
MIPS_INVAL("HILO");
|
| 575 |
generate_exception(ctx, EXCP_RI); |
| 576 |
return;
|
| 577 |
} |
| 578 |
MIPS_DEBUG("%s %s", opn, regnames[reg]);
|
| 579 |
} |
| 580 |
|
| 581 |
static void gen_muldiv (DisasContext *ctx, uint16_t opc, |
| 582 |
int rs, int rt) |
| 583 |
{
|
| 584 |
const unsigned char *opn = "unk"; |
| 585 |
|
| 586 |
GEN_LOAD_REG_TN(T0, rs); |
| 587 |
GEN_LOAD_REG_TN(T1, rt); |
| 588 |
switch (opc) {
|
| 589 |
case OPC_DIV:
|
| 590 |
gen_op_div(); |
| 591 |
opn = "div";
|
| 592 |
break;
|
| 593 |
case OPC_DIVU:
|
| 594 |
gen_op_divu(); |
| 595 |
opn = "divu";
|
| 596 |
break;
|
| 597 |
case OPC_MULT:
|
| 598 |
gen_op_mult(); |
| 599 |
opn = "mult";
|
| 600 |
break;
|
| 601 |
case OPC_MULTU:
|
| 602 |
gen_op_multu(); |
| 603 |
opn = "multu";
|
| 604 |
break;
|
| 605 |
case OPC_MADD:
|
| 606 |
gen_op_madd(); |
| 607 |
opn = "madd";
|
| 608 |
break;
|
| 609 |
case OPC_MADDU:
|
| 610 |
gen_op_maddu(); |
| 611 |
opn = "maddu";
|
| 612 |
break;
|
| 613 |
case OPC_MSUB:
|
| 614 |
gen_op_msub(); |
| 615 |
opn = "msub";
|
| 616 |
break;
|
| 617 |
case OPC_MSUBU:
|
| 618 |
gen_op_msubu(); |
| 619 |
opn = "msubu";
|
| 620 |
break;
|
| 621 |
default:
|
| 622 |
MIPS_INVAL("mul/div");
|
| 623 |
generate_exception(ctx, EXCP_RI); |
| 624 |
return;
|
| 625 |
} |
| 626 |
MIPS_DEBUG("%s %s %s", opn, regnames[rs], regnames[rt]);
|
| 627 |
} |
| 628 |
|
| 629 |
static void gen_cl (DisasContext *ctx, uint16_t opc, |
| 630 |
int rd, int rs) |
| 631 |
{
|
| 632 |
const unsigned char *opn = "unk"; |
| 633 |
if (rd == 0) { |
| 634 |
/* Treat as a NOP */
|
| 635 |
MIPS_DEBUG("NOP");
|
| 636 |
return;
|
| 637 |
} |
| 638 |
GEN_LOAD_REG_TN(T0, rs); |
| 639 |
switch (opc) {
|
| 640 |
case OPC_CLO:
|
| 641 |
/* CLO */
|
| 642 |
gen_op_clo(); |
| 643 |
opn = "clo";
|
| 644 |
break;
|
| 645 |
case OPC_CLZ:
|
| 646 |
/* CLZ */
|
| 647 |
gen_op_clz(); |
| 648 |
opn = "clz";
|
| 649 |
break;
|
| 650 |
default:
|
| 651 |
MIPS_INVAL("CLx");
|
| 652 |
generate_exception(ctx, EXCP_RI); |
| 653 |
return;
|
| 654 |
} |
| 655 |
gen_op_store_T0_gpr(rd); |
| 656 |
MIPS_DEBUG("%s %s, %s", opn, regnames[rd], regnames[rs]);
|
| 657 |
} |
| 658 |
|
| 659 |
/* Traps */
|
| 660 |
static void gen_trap (DisasContext *ctx, uint16_t opc, |
| 661 |
int rs, int rt, int16_t imm) |
| 662 |
{
|
| 663 |
int cond;
|
| 664 |
|
| 665 |
cond = 0;
|
| 666 |
/* Load needed operands */
|
| 667 |
switch (opc) {
|
| 668 |
case OPC_TEQ:
|
| 669 |
case OPC_TGE:
|
| 670 |
case OPC_TGEU:
|
| 671 |
case OPC_TLT:
|
| 672 |
case OPC_TLTU:
|
| 673 |
case OPC_TNE:
|
| 674 |
/* Compare two registers */
|
| 675 |
if (rs != rt) {
|
| 676 |
GEN_LOAD_REG_TN(T0, rs); |
| 677 |
GEN_LOAD_REG_TN(T1, rt); |
| 678 |
cond = 1;
|
| 679 |
} |
| 680 |
case OPC_TEQI:
|
| 681 |
case OPC_TGEI:
|
| 682 |
case OPC_TGEIU:
|
| 683 |
case OPC_TLTI:
|
| 684 |
case OPC_TLTIU:
|
| 685 |
case OPC_TNEI:
|
| 686 |
/* Compare register to immediate */
|
| 687 |
if (rs != 0 || imm != 0) { |
| 688 |
GEN_LOAD_REG_TN(T0, rs); |
| 689 |
GEN_LOAD_IMM_TN(T1, (int32_t)imm); |
| 690 |
cond = 1;
|
| 691 |
} |
| 692 |
break;
|
| 693 |
} |
| 694 |
if (cond == 0) { |
| 695 |
switch (opc) {
|
| 696 |
case OPC_TEQ: /* rs == rs */ |
| 697 |
case OPC_TEQI: /* r0 == 0 */ |
| 698 |
case OPC_TGE: /* rs >= rs */ |
| 699 |
case OPC_TGEI: /* r0 >= 0 */ |
| 700 |
case OPC_TGEU: /* rs >= rs unsigned */ |
| 701 |
case OPC_TGEIU: /* r0 >= 0 unsigned */ |
| 702 |
/* Always trap */
|
| 703 |
gen_op_set_T0(1);
|
| 704 |
break;
|
| 705 |
case OPC_TLT: /* rs < rs */ |
| 706 |
case OPC_TLTI: /* r0 < 0 */ |
| 707 |
case OPC_TLTU: /* rs < rs unsigned */ |
| 708 |
case OPC_TLTIU: /* r0 < 0 unsigned */ |
| 709 |
case OPC_TNE: /* rs != rs */ |
| 710 |
case OPC_TNEI: /* r0 != 0 */ |
| 711 |
/* Never trap: treat as NOP */
|
| 712 |
return;
|
| 713 |
default:
|
| 714 |
MIPS_INVAL("TRAP");
|
| 715 |
generate_exception(ctx, EXCP_RI); |
| 716 |
return;
|
| 717 |
} |
| 718 |
} else {
|
| 719 |
switch (opc) {
|
| 720 |
case OPC_TEQ:
|
| 721 |
case OPC_TEQI:
|
| 722 |
gen_op_eq(); |
| 723 |
break;
|
| 724 |
case OPC_TGE:
|
| 725 |
case OPC_TGEI:
|
| 726 |
gen_op_ge(); |
| 727 |
break;
|
| 728 |
case OPC_TGEU:
|
| 729 |
case OPC_TGEIU:
|
| 730 |
gen_op_geu(); |
| 731 |
break;
|
| 732 |
case OPC_TLT:
|
| 733 |
case OPC_TLTI:
|
| 734 |
gen_op_lt(); |
| 735 |
break;
|
| 736 |
case OPC_TLTU:
|
| 737 |
case OPC_TLTIU:
|
| 738 |
gen_op_ltu(); |
| 739 |
break;
|
| 740 |
case OPC_TNE:
|
| 741 |
case OPC_TNEI:
|
| 742 |
gen_op_ne(); |
| 743 |
break;
|
| 744 |
default:
|
| 745 |
MIPS_INVAL("TRAP");
|
| 746 |
generate_exception(ctx, EXCP_RI); |
| 747 |
return;
|
| 748 |
} |
| 749 |
} |
| 750 |
save_cpu_state(ctx, 1);
|
| 751 |
gen_op_trap(); |
| 752 |
ctx->bstate = BS_STOP; |
| 753 |
} |
| 754 |
|
| 755 |
/* Branches (before delay slot) */
|
| 756 |
static void gen_compute_branch (DisasContext *ctx, uint16_t opc, |
| 757 |
int rs, int rt, int32_t offset) |
| 758 |
{
|
| 759 |
target_ulong btarget; |
| 760 |
int blink, bcond;
|
| 761 |
|
| 762 |
btarget = -1;
|
| 763 |
blink = 0;
|
| 764 |
bcond = 0;
|
| 765 |
/* Load needed operands */
|
| 766 |
switch (opc) {
|
| 767 |
case OPC_BEQ:
|
| 768 |
case OPC_BEQL:
|
| 769 |
case OPC_BNE:
|
| 770 |
case OPC_BNEL:
|
| 771 |
/* Compare two registers */
|
| 772 |
if (rs != rt) {
|
| 773 |
GEN_LOAD_REG_TN(T0, rs); |
| 774 |
GEN_LOAD_REG_TN(T1, rt); |
| 775 |
bcond = 1;
|
| 776 |
} |
| 777 |
btarget = ctx->pc + 4 + offset;
|
| 778 |
break;
|
| 779 |
case OPC_BGEZ:
|
| 780 |
case OPC_BGEZAL:
|
| 781 |
case OPC_BGEZALL:
|
| 782 |
case OPC_BGEZL:
|
| 783 |
case OPC_BGTZ:
|
| 784 |
case OPC_BGTZL:
|
| 785 |
case OPC_BLEZ:
|
| 786 |
case OPC_BLEZL:
|
| 787 |
case OPC_BLTZ:
|
| 788 |
case OPC_BLTZAL:
|
| 789 |
case OPC_BLTZALL:
|
| 790 |
case OPC_BLTZL:
|
| 791 |
/* Compare to zero */
|
| 792 |
if (rs != 0) { |
| 793 |
gen_op_load_gpr_T0(rs); |
| 794 |
bcond = 1;
|
| 795 |
} |
| 796 |
btarget = ctx->pc + 4 + offset;
|
| 797 |
break;
|
| 798 |
case OPC_J:
|
| 799 |
case OPC_JAL:
|
| 800 |
/* Jump to immediate */
|
| 801 |
btarget = ((ctx->pc + 4) & 0xFF000000) | offset; |
| 802 |
break;
|
| 803 |
case OPC_JR:
|
| 804 |
case OPC_JALR:
|
| 805 |
/* Jump to register */
|
| 806 |
if (offset != 0) { |
| 807 |
/* Only hint = 0 is valid */
|
| 808 |
generate_exception(ctx, EXCP_RI); |
| 809 |
return;
|
| 810 |
} |
| 811 |
GEN_LOAD_REG_TN(T2, rs); |
| 812 |
break;
|
| 813 |
default:
|
| 814 |
MIPS_INVAL("branch/jump");
|
| 815 |
generate_exception(ctx, EXCP_RI); |
| 816 |
return;
|
| 817 |
} |
| 818 |
if (bcond == 0) { |
| 819 |
/* No condition to be computed */
|
| 820 |
switch (opc) {
|
| 821 |
case OPC_BEQ: /* rx == rx */ |
| 822 |
case OPC_BEQL: /* rx == rx likely */ |
| 823 |
case OPC_BGEZ: /* 0 >= 0 */ |
| 824 |
case OPC_BGEZL: /* 0 >= 0 likely */ |
| 825 |
case OPC_BLEZ: /* 0 <= 0 */ |
| 826 |
case OPC_BLEZL: /* 0 <= 0 likely */ |
| 827 |
/* Always take */
|
| 828 |
ctx->hflags |= MIPS_HFLAG_DS | MIPS_HFLAG_B; |
| 829 |
MIPS_DEBUG("balways");
|
| 830 |
break;
|
| 831 |
case OPC_BGEZAL: /* 0 >= 0 */ |
| 832 |
case OPC_BGEZALL: /* 0 >= 0 likely */ |
| 833 |
/* Always take and link */
|
| 834 |
blink = 31;
|
| 835 |
ctx->hflags |= MIPS_HFLAG_DS | MIPS_HFLAG_B; |
| 836 |
MIPS_DEBUG("balways and link");
|
| 837 |
break;
|
| 838 |
case OPC_BNE: /* rx != rx */ |
| 839 |
case OPC_BGTZ: /* 0 > 0 */ |
| 840 |
case OPC_BLTZ: /* 0 < 0 */ |
| 841 |
case OPC_BLTZAL: /* 0 < 0 */ |
| 842 |
/* Treated as NOP */
|
| 843 |
MIPS_DEBUG("bnever (NOP)");
|
| 844 |
return;
|
| 845 |
case OPC_BNEL: /* rx != rx likely */ |
| 846 |
case OPC_BGTZL: /* 0 > 0 likely */ |
| 847 |
case OPC_BLTZALL: /* 0 < 0 likely */ |
| 848 |
case OPC_BLTZL: /* 0 < 0 likely */ |
| 849 |
/* Skip the instruction in the delay slot */
|
| 850 |
MIPS_DEBUG("bnever and skip");
|
| 851 |
gen_op_branch((long)ctx->tb, ctx->pc + 4); |
| 852 |
return;
|
| 853 |
case OPC_J:
|
| 854 |
ctx->hflags |= MIPS_HFLAG_DS | MIPS_HFLAG_B; |
| 855 |
MIPS_DEBUG("j %08x", btarget);
|
| 856 |
break;
|
| 857 |
case OPC_JAL:
|
| 858 |
blink = 31;
|
| 859 |
ctx->hflags |= MIPS_HFLAG_DS | MIPS_HFLAG_B; |
| 860 |
MIPS_DEBUG("jal %08x", btarget);
|
| 861 |
break;
|
| 862 |
case OPC_JR:
|
| 863 |
ctx->hflags |= MIPS_HFLAG_DS | MIPS_HFLAG_BR; |
| 864 |
MIPS_DEBUG("jr %s", regnames[rs]);
|
| 865 |
break;
|
| 866 |
case OPC_JALR:
|
| 867 |
blink = rt; |
| 868 |
ctx->hflags |= MIPS_HFLAG_DS | MIPS_HFLAG_BR; |
| 869 |
MIPS_DEBUG("jalr %s, %s", regnames[rt], regnames[rs]);
|
| 870 |
break;
|
| 871 |
default:
|
| 872 |
MIPS_INVAL("branch/jump");
|
| 873 |
generate_exception(ctx, EXCP_RI); |
| 874 |
return;
|
| 875 |
} |
| 876 |
} else {
|
| 877 |
switch (opc) {
|
| 878 |
case OPC_BEQ:
|
| 879 |
gen_op_eq(); |
| 880 |
MIPS_DEBUG("beq %s, %s, %08x",
|
| 881 |
regnames[rs], regnames[rt], btarget); |
| 882 |
goto not_likely;
|
| 883 |
case OPC_BEQL:
|
| 884 |
gen_op_eq(); |
| 885 |
MIPS_DEBUG("beql %s, %s, %08x",
|
| 886 |
regnames[rs], regnames[rt], btarget); |
| 887 |
goto likely;
|
| 888 |
case OPC_BNE:
|
| 889 |
gen_op_ne(); |
| 890 |
MIPS_DEBUG("bne %s, %s, %08x",
|
| 891 |
regnames[rs], regnames[rt], btarget); |
| 892 |
goto not_likely;
|
| 893 |
case OPC_BNEL:
|
| 894 |
gen_op_ne(); |
| 895 |
MIPS_DEBUG("bnel %s, %s, %08x",
|
| 896 |
regnames[rs], regnames[rt], btarget); |
| 897 |
goto likely;
|
| 898 |
case OPC_BGEZ:
|
| 899 |
gen_op_gez(); |
| 900 |
MIPS_DEBUG("bgez %s, %08x", regnames[rs], btarget);
|
| 901 |
goto not_likely;
|
| 902 |
case OPC_BGEZL:
|
| 903 |
gen_op_gez(); |
| 904 |
MIPS_DEBUG("bgezl %s, %08x", regnames[rs], btarget);
|
| 905 |
goto likely;
|
| 906 |
case OPC_BGEZAL:
|
| 907 |
gen_op_gez(); |
| 908 |
MIPS_DEBUG("bgezal %s, %08x", regnames[rs], btarget);
|
| 909 |
blink = 31;
|
| 910 |
goto not_likely;
|
| 911 |
case OPC_BGEZALL:
|
| 912 |
gen_op_gez(); |
| 913 |
blink = 31;
|
| 914 |
MIPS_DEBUG("bgezall %s, %08x", regnames[rs], btarget);
|
| 915 |
goto likely;
|
| 916 |
case OPC_BGTZ:
|
| 917 |
gen_op_gtz(); |
| 918 |
MIPS_DEBUG("bgtz %s, %08x", regnames[rs], btarget);
|
| 919 |
goto not_likely;
|
| 920 |
case OPC_BGTZL:
|
| 921 |
gen_op_gtz(); |
| 922 |
MIPS_DEBUG("bgtzl %s, %08x", regnames[rs], btarget);
|
| 923 |
goto likely;
|
| 924 |
case OPC_BLEZ:
|
| 925 |
gen_op_lez(); |
| 926 |
MIPS_DEBUG("blez %s, %08x", regnames[rs], btarget);
|
| 927 |
goto not_likely;
|
| 928 |
case OPC_BLEZL:
|
| 929 |
gen_op_lez(); |
| 930 |
MIPS_DEBUG("blezl %s, %08x", regnames[rs], btarget);
|
| 931 |
goto likely;
|
| 932 |
case OPC_BLTZ:
|
| 933 |
gen_op_ltz(); |
| 934 |
MIPS_DEBUG("bltz %s, %08x", regnames[rs], btarget);
|
| 935 |
goto not_likely;
|
| 936 |
case OPC_BLTZL:
|
| 937 |
gen_op_ltz(); |
| 938 |
MIPS_DEBUG("bltzl %s, %08x", regnames[rs], btarget);
|
| 939 |
goto likely;
|
| 940 |
case OPC_BLTZAL:
|
| 941 |
gen_op_ltz(); |
| 942 |
blink = 31;
|
| 943 |
MIPS_DEBUG("bltzal %s, %08x", regnames[rs], btarget);
|
| 944 |
not_likely:
|
| 945 |
ctx->hflags |= MIPS_HFLAG_DS | MIPS_HFLAG_BC; |
| 946 |
break;
|
| 947 |
case OPC_BLTZALL:
|
| 948 |
gen_op_ltz(); |
| 949 |
blink = 31;
|
| 950 |
MIPS_DEBUG("bltzall %s, %08x", regnames[rs], btarget);
|
| 951 |
likely:
|
| 952 |
ctx->hflags |= MIPS_HFLAG_DS | MIPS_HFLAG_BL; |
| 953 |
break;
|
| 954 |
} |
| 955 |
gen_op_set_bcond(); |
| 956 |
} |
| 957 |
MIPS_DEBUG("enter ds: link %d cond %02x target %08x",
|
| 958 |
blink, ctx->hflags, btarget); |
| 959 |
ctx->btarget = btarget; |
| 960 |
if (blink > 0) { |
| 961 |
gen_op_set_T0(ctx->pc + 8);
|
| 962 |
gen_op_store_T0_gpr(blink); |
| 963 |
} |
| 964 |
return;
|
| 965 |
} |
| 966 |
|
| 967 |
/* CP0 (MMU and control) */
|
| 968 |
static void gen_cp0 (DisasContext *ctx, uint16_t opc, int rt, int rd) |
| 969 |
{
|
| 970 |
const unsigned char *opn = "unk"; |
| 971 |
|
| 972 |
if (!(ctx->CP0_Status & (1 << CP0St_CU0))) { |
| 973 |
if (loglevel & CPU_LOG_TB_IN_ASM) {
|
| 974 |
fprintf(logfile, "CP0 is not usable\n");
|
| 975 |
} |
| 976 |
gen_op_raise_exception_err(EXCP_CpU, 0);
|
| 977 |
return;
|
| 978 |
} |
| 979 |
switch (opc) {
|
| 980 |
case OPC_MFC0:
|
| 981 |
if (rt == 0) { |
| 982 |
/* Treat as NOP */
|
| 983 |
return;
|
| 984 |
} |
| 985 |
gen_op_mfc0(rd, ctx->opcode & 0x7);
|
| 986 |
gen_op_store_T0_gpr(rt); |
| 987 |
opn = "mfc0";
|
| 988 |
break;
|
| 989 |
case OPC_MTC0:
|
| 990 |
/* If we get an exception, we want to restart at next instruction */
|
| 991 |
ctx->pc += 4;
|
| 992 |
save_cpu_state(ctx, 1);
|
| 993 |
ctx->pc -= 4;
|
| 994 |
GEN_LOAD_REG_TN(T0, rt); |
| 995 |
gen_op_mtc0(rd, ctx->opcode & 0x7);
|
| 996 |
/* Stop translation as we may have switched the execution mode */
|
| 997 |
ctx->bstate = BS_STOP; |
| 998 |
opn = "mtc0";
|
| 999 |
break;
|
| 1000 |
#if defined(MIPS_USES_R4K_TLB)
|
| 1001 |
case OPC_TLBWI:
|
| 1002 |
gen_op_tlbwi(); |
| 1003 |
opn = "tlbwi";
|
| 1004 |
break;
|
| 1005 |
case OPC_TLBWR:
|
| 1006 |
gen_op_tlbwr(); |
| 1007 |
opn = "tlbwr";
|
| 1008 |
break;
|
| 1009 |
case OPC_TLBP:
|
| 1010 |
gen_op_tlbp(); |
| 1011 |
opn = "tlbp";
|
| 1012 |
break;
|
| 1013 |
case OPC_TLBR:
|
| 1014 |
gen_op_tlbr(); |
| 1015 |
opn = "tlbr";
|
| 1016 |
break;
|
| 1017 |
#endif
|
| 1018 |
case OPC_ERET:
|
| 1019 |
opn = "eret";
|
| 1020 |
save_cpu_state(ctx, 0);
|
| 1021 |
gen_op_eret(); |
| 1022 |
ctx->bstate = BS_EXCP; |
| 1023 |
break;
|
| 1024 |
case OPC_DERET:
|
| 1025 |
opn = "deret";
|
| 1026 |
if (!(ctx->hflags & MIPS_HFLAG_DM)) {
|
| 1027 |
generate_exception(ctx, EXCP_RI); |
| 1028 |
} else {
|
| 1029 |
save_cpu_state(ctx, 0);
|
| 1030 |
gen_op_deret(); |
| 1031 |
ctx->bstate = BS_EXCP; |
| 1032 |
} |
| 1033 |
break;
|
| 1034 |
/* XXX: TODO: WAIT */
|
| 1035 |
default:
|
| 1036 |
if (loglevel & CPU_LOG_TB_IN_ASM) {
|
| 1037 |
fprintf(logfile, "Invalid CP0 opcode: %08x %03x %03x %03x\n",
|
| 1038 |
ctx->opcode, ctx->opcode >> 26, ctx->opcode & 0x3F, |
| 1039 |
((ctx->opcode >> 16) & 0x1F)); |
| 1040 |
} |
| 1041 |
generate_exception(ctx, EXCP_RI); |
| 1042 |
return;
|
| 1043 |
} |
| 1044 |
MIPS_DEBUG("%s %s %d", opn, regnames[rt], rd);
|
| 1045 |
} |
| 1046 |
|
| 1047 |
/* Coprocessor 1 (FPU) */
|
| 1048 |
|
| 1049 |
/* ISA extensions */
|
| 1050 |
/* MIPS16 extension to MIPS32 */
|
| 1051 |
/* SmartMIPS extension to MIPS32 */
|
| 1052 |
|
| 1053 |
#ifdef TARGET_MIPS64
|
| 1054 |
static void gen_arith64 (DisasContext *ctx, uint16_t opc) |
| 1055 |
{
|
| 1056 |
if (func == 0x02 && rd == 0) { |
| 1057 |
/* NOP */
|
| 1058 |
return;
|
| 1059 |
} |
| 1060 |
if (rs == 0 || rt == 0) { |
| 1061 |
gen_op_reset_T0(); |
| 1062 |
gen_op_save64(); |
| 1063 |
} else {
|
| 1064 |
gen_op_load_gpr_T0(rs); |
| 1065 |
gen_op_load_gpr_T1(rt); |
| 1066 |
gen_op_save64(); |
| 1067 |
if (func & 0x01) |
| 1068 |
gen_op_mul64u(); |
| 1069 |
else
|
| 1070 |
gen_op_mul64s(); |
| 1071 |
} |
| 1072 |
if (func & 0x02) |
| 1073 |
gen_op_add64(); |
| 1074 |
else
|
| 1075 |
gen_op_sub64(); |
| 1076 |
} |
| 1077 |
|
| 1078 |
/* Coprocessor 3 (FPU) */
|
| 1079 |
|
| 1080 |
/* MDMX extension to MIPS64 */
|
| 1081 |
/* MIPS-3D extension to MIPS64 */
|
| 1082 |
|
| 1083 |
#endif
|
| 1084 |
|
| 1085 |
static void decode_opc (DisasContext *ctx) |
| 1086 |
{
|
| 1087 |
int32_t offset; |
| 1088 |
int rs, rt, rd, sa;
|
| 1089 |
uint16_t op, op1; |
| 1090 |
int16_t imm; |
| 1091 |
|
| 1092 |
if ((ctx->hflags & MIPS_HFLAG_DS) &&
|
| 1093 |
(ctx->hflags & MIPS_HFLAG_BL)) {
|
| 1094 |
/* Handle blikely not taken case */
|
| 1095 |
MIPS_DEBUG("blikely condition (%08x)", ctx->pc + 4); |
| 1096 |
gen_op_blikely((long)ctx->tb, ctx->pc + 4, |
| 1097 |
ctx->hflags & ~(MIPS_HFLAG_BMASK | MIPS_HFLAG_DS)); |
| 1098 |
} |
| 1099 |
op = ctx->opcode >> 26;
|
| 1100 |
rs = ((ctx->opcode >> 21) & 0x1F); |
| 1101 |
rt = ((ctx->opcode >> 16) & 0x1F); |
| 1102 |
rd = ((ctx->opcode >> 11) & 0x1F); |
| 1103 |
sa = ((ctx->opcode >> 6) & 0x1F); |
| 1104 |
imm = (int16_t)ctx->opcode; |
| 1105 |
switch (op) {
|
| 1106 |
case 0x00: /* Special opcode */ |
| 1107 |
op1 = ctx->opcode & 0x3F;
|
| 1108 |
switch (op1) {
|
| 1109 |
case 0x00: /* Arithmetic with immediate */ |
| 1110 |
case 0x02 ... 0x03: |
| 1111 |
gen_arith_imm(ctx, op1 | EXT_SPECIAL, rd, rt, sa); |
| 1112 |
break;
|
| 1113 |
case 0x04: /* Arithmetic */ |
| 1114 |
case 0x06 ... 0x07: |
| 1115 |
case 0x0A ... 0x0B: |
| 1116 |
case 0x20 ... 0x27: |
| 1117 |
case 0x2A ... 0x2B: |
| 1118 |
gen_arith(ctx, op1 | EXT_SPECIAL, rd, rs, rt); |
| 1119 |
break;
|
| 1120 |
case 0x18 ... 0x1B: /* MULT / DIV */ |
| 1121 |
gen_muldiv(ctx, op1 | EXT_SPECIAL, rs, rt); |
| 1122 |
break;
|
| 1123 |
case 0x08 ... 0x09: /* Jumps */ |
| 1124 |
gen_compute_branch(ctx, op1 | EXT_SPECIAL, rs, rd, sa); |
| 1125 |
return;
|
| 1126 |
case 0x30 ... 0x34: /* Traps */ |
| 1127 |
case 0x36: |
| 1128 |
gen_trap(ctx, op1 | EXT_SPECIAL, rs, rt, -1);
|
| 1129 |
break;
|
| 1130 |
case 0x10: /* Move from HI/LO */ |
| 1131 |
case 0x12: |
| 1132 |
gen_HILO(ctx, op1 | EXT_SPECIAL, rd); |
| 1133 |
break;
|
| 1134 |
case 0x11: |
| 1135 |
case 0x13: /* Move to HI/LO */ |
| 1136 |
gen_HILO(ctx, op1 | EXT_SPECIAL, rs); |
| 1137 |
break;
|
| 1138 |
case 0x0C: /* SYSCALL */ |
| 1139 |
generate_exception(ctx, EXCP_SYSCALL); |
| 1140 |
break;
|
| 1141 |
case 0x0D: /* BREAK */ |
| 1142 |
generate_exception(ctx, EXCP_BREAK); |
| 1143 |
break;
|
| 1144 |
case 0x0F: /* SYNC */ |
| 1145 |
/* Treat as a noop */
|
| 1146 |
break;
|
| 1147 |
case 0x05: /* Pmon entry point */ |
| 1148 |
gen_op_pmon((ctx->opcode >> 6) & 0x1F); |
| 1149 |
break;
|
| 1150 |
#if defined (MIPS_HAS_MOVCI)
|
| 1151 |
case 0x01: /* MOVCI */ |
| 1152 |
#endif
|
| 1153 |
#if defined (TARGET_MIPS64)
|
| 1154 |
case 0x14: /* MIPS64 specific opcodes */ |
| 1155 |
case 0x16: |
| 1156 |
case 0x17: |
| 1157 |
case 0x1C ... 0x1F: |
| 1158 |
case 0x2C ... 0x2F: |
| 1159 |
case 0x37: |
| 1160 |
case 0x39 ... 0x3B: |
| 1161 |
case 0x3E ... 0x3F: |
| 1162 |
#endif
|
| 1163 |
default: /* Invalid */ |
| 1164 |
MIPS_INVAL("special");
|
| 1165 |
generate_exception(ctx, EXCP_RI); |
| 1166 |
break;
|
| 1167 |
} |
| 1168 |
break;
|
| 1169 |
case 0x1C: /* Special2 opcode */ |
| 1170 |
op1 = ctx->opcode & 0x3F;
|
| 1171 |
switch (op1) {
|
| 1172 |
#if defined (MIPS_USES_R4K_EXT)
|
| 1173 |
/* Those instructions are not part of MIPS32 core */
|
| 1174 |
case 0x00 ... 0x01: /* Multiply and add/sub */ |
| 1175 |
case 0x04 ... 0x05: |
| 1176 |
gen_muldiv(ctx, op1 | EXT_SPECIAL2, rs, rt); |
| 1177 |
break;
|
| 1178 |
case 0x02: /* MUL */ |
| 1179 |
gen_arith(ctx, op1 | EXT_SPECIAL2, rd, rs, rt); |
| 1180 |
break;
|
| 1181 |
case 0x20 ... 0x21: /* CLO / CLZ */ |
| 1182 |
gen_cl(ctx, op1 | EXT_SPECIAL2, rd, rs); |
| 1183 |
break;
|
| 1184 |
#endif
|
| 1185 |
case 0x3F: /* SDBBP */ |
| 1186 |
/* XXX: not clear which exception should be raised
|
| 1187 |
* when in debug mode...
|
| 1188 |
*/
|
| 1189 |
if (!(ctx->hflags & MIPS_HFLAG_DM)) {
|
| 1190 |
generate_exception(ctx, EXCP_DBp); |
| 1191 |
} else {
|
| 1192 |
generate_exception(ctx, EXCP_DBp); |
| 1193 |
} |
| 1194 |
/* Treat as a noop */
|
| 1195 |
break;
|
| 1196 |
default: /* Invalid */ |
| 1197 |
MIPS_INVAL("special2");
|
| 1198 |
generate_exception(ctx, EXCP_RI); |
| 1199 |
break;
|
| 1200 |
} |
| 1201 |
break;
|
| 1202 |
case 0x01: /* B REGIMM opcode */ |
| 1203 |
op1 = ((ctx->opcode >> 16) & 0x1F); |
| 1204 |
switch (op1) {
|
| 1205 |
case 0x00 ... 0x03: /* REGIMM branches */ |
| 1206 |
case 0x10 ... 0x13: |
| 1207 |
gen_compute_branch(ctx, op1 | EXT_REGIMM, rs, -1, imm << 2); |
| 1208 |
return;
|
| 1209 |
case 0x08 ... 0x0C: /* Traps */ |
| 1210 |
case 0x0E: |
| 1211 |
gen_trap(ctx, op1 | EXT_REGIMM, rs, -1, imm);
|
| 1212 |
break;
|
| 1213 |
default: /* Invalid */ |
| 1214 |
MIPS_INVAL("REGIMM");
|
| 1215 |
generate_exception(ctx, EXCP_RI); |
| 1216 |
break;
|
| 1217 |
} |
| 1218 |
break;
|
| 1219 |
case 0x10: /* CP0 opcode */ |
| 1220 |
op1 = ((ctx->opcode >> 21) & 0x1F); |
| 1221 |
switch (op1) {
|
| 1222 |
case 0x00: |
| 1223 |
case 0x04: |
| 1224 |
gen_cp0(ctx, op1 | EXT_CP0, rt, rd); |
| 1225 |
break;
|
| 1226 |
default:
|
| 1227 |
gen_cp0(ctx, (ctx->opcode & 0x1F) | EXT_CP0, rt, rd);
|
| 1228 |
break;
|
| 1229 |
} |
| 1230 |
break;
|
| 1231 |
case 0x08 ... 0x0F: /* Arithmetic with immediate opcode */ |
| 1232 |
gen_arith_imm(ctx, op, rt, rs, imm); |
| 1233 |
break;
|
| 1234 |
case 0x02 ... 0x03: /* Jump */ |
| 1235 |
offset = (int32_t)(ctx->opcode & 0x03FFFFFF) << 2; |
| 1236 |
gen_compute_branch(ctx, op, rs, rt, offset); |
| 1237 |
return;
|
| 1238 |
case 0x04 ... 0x07: /* Branch */ |
| 1239 |
case 0x14 ... 0x17: |
| 1240 |
gen_compute_branch(ctx, op, rs, rt, imm << 2);
|
| 1241 |
return;
|
| 1242 |
case 0x20 ... 0x26: /* Load and stores */ |
| 1243 |
case 0x28 ... 0x2E: |
| 1244 |
case 0x30: |
| 1245 |
case 0x38: |
| 1246 |
gen_ldst(ctx, op, rt, rs, imm); |
| 1247 |
break;
|
| 1248 |
case 0x2F: /* Cache operation */ |
| 1249 |
/* Treat as a noop */
|
| 1250 |
break;
|
| 1251 |
case 0x33: /* Prefetch */ |
| 1252 |
/* Treat as a noop */
|
| 1253 |
break;
|
| 1254 |
case 0x3F: /* HACK */ |
| 1255 |
break;
|
| 1256 |
#if defined(MIPS_USES_FPU)
|
| 1257 |
case 0x31 ... 0x32: /* Floating point load/store */ |
| 1258 |
case 0x35 ... 0x36: |
| 1259 |
case 0x3A ... 0x3B: |
| 1260 |
case 0x3D ... 0x3E: |
| 1261 |
/* Not implemented */
|
| 1262 |
/* XXX: not correct */
|
| 1263 |
#endif
|
| 1264 |
case 0x11: /* CP1 opcode */ |
| 1265 |
/* Not implemented */
|
| 1266 |
/* XXX: not correct */
|
| 1267 |
case 0x12: /* CP2 opcode */ |
| 1268 |
/* Not implemented */
|
| 1269 |
/* XXX: not correct */
|
| 1270 |
case 0x13: /* CP3 opcode */ |
| 1271 |
/* Not implemented */
|
| 1272 |
/* XXX: not correct */
|
| 1273 |
#if defined (TARGET_MIPS64)
|
| 1274 |
case 0x18 ... 0x1B: |
| 1275 |
case 0x27: |
| 1276 |
case 0x34: |
| 1277 |
case 0x37: |
| 1278 |
/* MIPS64 opcodes */
|
| 1279 |
#endif
|
| 1280 |
#if defined (MIPS_HAS_JALX)
|
| 1281 |
case 0x1D: |
| 1282 |
/* JALX: not implemented */
|
| 1283 |
#endif
|
| 1284 |
case 0x1E: |
| 1285 |
/* ASE specific */
|
| 1286 |
#if defined (MIPS_HAS_LSC)
|
| 1287 |
case 0x31: /* LWC1 */ |
| 1288 |
case 0x32: /* LWC2 */ |
| 1289 |
case 0x35: /* SDC1 */ |
| 1290 |
case 0x36: /* SDC2 */ |
| 1291 |
#endif
|
| 1292 |
default: /* Invalid */ |
| 1293 |
MIPS_INVAL("");
|
| 1294 |
generate_exception(ctx, EXCP_RI); |
| 1295 |
break;
|
| 1296 |
} |
| 1297 |
if (ctx->hflags & MIPS_HFLAG_DS) {
|
| 1298 |
int hflags = ctx->hflags;
|
| 1299 |
/* Branches completion */
|
| 1300 |
ctx->hflags &= ~(MIPS_HFLAG_BMASK | MIPS_HFLAG_DS); |
| 1301 |
ctx->bstate = BS_BRANCH; |
| 1302 |
save_cpu_state(ctx, 0);
|
| 1303 |
switch (hflags & MIPS_HFLAG_BMASK) {
|
| 1304 |
case MIPS_HFLAG_B:
|
| 1305 |
/* unconditional branch */
|
| 1306 |
MIPS_DEBUG("unconditional branch");
|
| 1307 |
gen_op_branch((long)ctx->tb, ctx->btarget);
|
| 1308 |
break;
|
| 1309 |
case MIPS_HFLAG_BL:
|
| 1310 |
/* blikely taken case */
|
| 1311 |
MIPS_DEBUG("blikely branch taken");
|
| 1312 |
gen_op_branch((long)ctx->tb, ctx->btarget);
|
| 1313 |
break;
|
| 1314 |
case MIPS_HFLAG_BC:
|
| 1315 |
/* Conditional branch */
|
| 1316 |
MIPS_DEBUG("conditional branch");
|
| 1317 |
gen_op_bcond((long)ctx->tb, ctx->btarget, ctx->pc + 4); |
| 1318 |
break;
|
| 1319 |
case MIPS_HFLAG_BR:
|
| 1320 |
/* unconditional branch to register */
|
| 1321 |
MIPS_DEBUG("branch to register");
|
| 1322 |
gen_op_breg(); |
| 1323 |
break;
|
| 1324 |
default:
|
| 1325 |
MIPS_DEBUG("unknown branch");
|
| 1326 |
break;
|
| 1327 |
} |
| 1328 |
} |
| 1329 |
} |
| 1330 |
|
| 1331 |
int gen_intermediate_code_internal (CPUState *env, TranslationBlock *tb,
|
| 1332 |
int search_pc)
|
| 1333 |
{
|
| 1334 |
DisasContext ctx, *ctxp = &ctx; |
| 1335 |
target_ulong pc_start; |
| 1336 |
uint16_t *gen_opc_end; |
| 1337 |
int j, lj = -1; |
| 1338 |
|
| 1339 |
pc_start = tb->pc; |
| 1340 |
gen_opc_ptr = gen_opc_buf; |
| 1341 |
gen_opc_end = gen_opc_buf + OPC_MAX_SIZE; |
| 1342 |
gen_opparam_ptr = gen_opparam_buf; |
| 1343 |
ctx.pc = pc_start; |
| 1344 |
ctx.tb = tb; |
| 1345 |
ctx.bstate = BS_NONE; |
| 1346 |
/* Restore delay slot state */
|
| 1347 |
ctx.hflags = env->hflags; |
| 1348 |
ctx.saved_hflags = ctx.hflags; |
| 1349 |
if (ctx.hflags & MIPS_HFLAG_BR) {
|
| 1350 |
gen_op_restore_breg_target(); |
| 1351 |
} else if (ctx.hflags & MIPS_HFLAG_B) { |
| 1352 |
ctx.btarget = env->btarget; |
| 1353 |
} else if (ctx.hflags & MIPS_HFLAG_BMASK) { |
| 1354 |
/* If we are in the delay slot of a conditional branch,
|
| 1355 |
* restore the branch condition from env->bcond to T2
|
| 1356 |
*/
|
| 1357 |
ctx.btarget = env->btarget; |
| 1358 |
gen_op_restore_bcond(); |
| 1359 |
} |
| 1360 |
#if defined(CONFIG_USER_ONLY)
|
| 1361 |
ctx.mem_idx = 0;
|
| 1362 |
#else
|
| 1363 |
ctx.mem_idx = (ctx.hflags & MIPS_HFLAG_MODE) == MIPS_HFLAG_UM ? 0 : 1; |
| 1364 |
#endif
|
| 1365 |
ctx.CP0_Status = env->CP0_Status; |
| 1366 |
#ifdef DEBUG_DISAS
|
| 1367 |
if (loglevel & CPU_LOG_TB_CPU) {
|
| 1368 |
fprintf(logfile, "------------------------------------------------\n");
|
| 1369 |
cpu_dump_state(env, logfile, fprintf, 0);
|
| 1370 |
} |
| 1371 |
#endif
|
| 1372 |
#if defined MIPS_DEBUG_DISAS
|
| 1373 |
if (loglevel & CPU_LOG_TB_IN_ASM)
|
| 1374 |
fprintf(logfile, "\ntb %p super %d cond %04x %04x\n",
|
| 1375 |
tb, ctx.mem_idx, ctx.hflags, env->hflags); |
| 1376 |
#endif
|
| 1377 |
while (ctx.bstate == BS_NONE && gen_opc_ptr < gen_opc_end) {
|
| 1378 |
if (search_pc) {
|
| 1379 |
j = gen_opc_ptr - gen_opc_buf; |
| 1380 |
save_cpu_state(ctxp, 1);
|
| 1381 |
if (lj < j) {
|
| 1382 |
lj++; |
| 1383 |
while (lj < j)
|
| 1384 |
gen_opc_instr_start[lj++] = 0;
|
| 1385 |
gen_opc_pc[lj] = ctx.pc; |
| 1386 |
gen_opc_instr_start[lj] = 1;
|
| 1387 |
} |
| 1388 |
} |
| 1389 |
ctx.opcode = ldl_code(ctx.pc); |
| 1390 |
decode_opc(&ctx); |
| 1391 |
ctx.pc += 4;
|
| 1392 |
if ((ctx.pc & (TARGET_PAGE_SIZE - 1)) == 0) |
| 1393 |
break;
|
| 1394 |
#if defined (MIPS_SINGLE_STEP)
|
| 1395 |
break;
|
| 1396 |
#endif
|
| 1397 |
} |
| 1398 |
if (ctx.bstate != BS_BRANCH && ctx.bstate != BS_EXCP) {
|
| 1399 |
save_cpu_state(ctxp, 0);
|
| 1400 |
gen_op_branch((long)ctx.tb, ctx.pc);
|
| 1401 |
} |
| 1402 |
gen_op_reset_T0(); |
| 1403 |
/* Generate the return instruction */
|
| 1404 |
gen_op_exit_tb(); |
| 1405 |
*gen_opc_ptr = INDEX_op_end; |
| 1406 |
if (search_pc) {
|
| 1407 |
j = gen_opc_ptr - gen_opc_buf; |
| 1408 |
lj++; |
| 1409 |
while (lj <= j)
|
| 1410 |
gen_opc_instr_start[lj++] = 0;
|
| 1411 |
tb->size = 0;
|
| 1412 |
} else {
|
| 1413 |
tb->size = ctx.pc - pc_start; |
| 1414 |
} |
| 1415 |
#ifdef DEBUG_DISAS
|
| 1416 |
#if defined MIPS_DEBUG_DISAS
|
| 1417 |
if (loglevel & CPU_LOG_TB_IN_ASM)
|
| 1418 |
fprintf(logfile, "\n");
|
| 1419 |
#endif
|
| 1420 |
if (loglevel & CPU_LOG_TB_IN_ASM) {
|
| 1421 |
fprintf(logfile, "IN: %s\n", lookup_symbol(pc_start));
|
| 1422 |
target_disas(logfile, pc_start, ctx.pc - pc_start, 0);
|
| 1423 |
fprintf(logfile, "\n");
|
| 1424 |
} |
| 1425 |
if (loglevel & CPU_LOG_TB_OP) {
|
| 1426 |
fprintf(logfile, "OP:\n");
|
| 1427 |
dump_ops(gen_opc_buf, gen_opparam_buf); |
| 1428 |
fprintf(logfile, "\n");
|
| 1429 |
} |
| 1430 |
if (loglevel & CPU_LOG_TB_CPU) {
|
| 1431 |
fprintf(logfile, "---------------- %d %08x\n", ctx.bstate, ctx.hflags);
|
| 1432 |
} |
| 1433 |
#endif
|
| 1434 |
|
| 1435 |
return 0; |
| 1436 |
} |
| 1437 |
|
| 1438 |
int gen_intermediate_code (CPUState *env, struct TranslationBlock *tb) |
| 1439 |
{
|
| 1440 |
return gen_intermediate_code_internal(env, tb, 0); |
| 1441 |
} |
| 1442 |
|
| 1443 |
int gen_intermediate_code_pc (CPUState *env, struct TranslationBlock *tb) |
| 1444 |
{
|
| 1445 |
return gen_intermediate_code_internal(env, tb, 1); |
| 1446 |
} |
| 1447 |
|
| 1448 |
void cpu_dump_state (CPUState *env, FILE *f,
|
| 1449 |
int (*cpu_fprintf)(FILE *f, const char *fmt, ...), |
| 1450 |
int flags)
|
| 1451 |
{
|
| 1452 |
int i;
|
| 1453 |
|
| 1454 |
cpu_fprintf(f, "pc=0x%08x HI=0x%08x LO=0x%08x ds %04x %08x %d\n",
|
| 1455 |
env->PC, env->HI, env->LO, env->hflags, env->btarget, env->bcond); |
| 1456 |
for (i = 0; i < 32; i++) { |
| 1457 |
if ((i & 3) == 0) |
| 1458 |
cpu_fprintf(f, "GPR%02d:", i);
|
| 1459 |
cpu_fprintf(f, " %s %08x", regnames[i], env->gpr[i]);
|
| 1460 |
if ((i & 3) == 3) |
| 1461 |
cpu_fprintf(f, "\n");
|
| 1462 |
} |
| 1463 |
cpu_fprintf(f, "CP0 Status 0x%08x Cause 0x%08x EPC 0x%08x\n",
|
| 1464 |
env->CP0_Status, env->CP0_Cause, env->CP0_EPC); |
| 1465 |
cpu_fprintf(f, " Config0 0x%08x Config1 0x%08x LLAddr 0x%08x\n",
|
| 1466 |
env->CP0_Config0, env->CP0_Config1, env->CP0_LLAddr); |
| 1467 |
} |
| 1468 |
|
| 1469 |
CPUMIPSState *cpu_mips_init (void)
|
| 1470 |
{
|
| 1471 |
CPUMIPSState *env; |
| 1472 |
|
| 1473 |
cpu_exec_init(); |
| 1474 |
env = qemu_mallocz(sizeof(CPUMIPSState));
|
| 1475 |
if (!env)
|
| 1476 |
return NULL; |
| 1477 |
tlb_flush(env, 1);
|
| 1478 |
/* Minimal init */
|
| 1479 |
env->PC = 0xBFC00000;
|
| 1480 |
#if defined (MIPS_USES_R4K_TLB)
|
| 1481 |
env->CP0_random = MIPS_TLB_NB - 1;
|
| 1482 |
#endif
|
| 1483 |
env->CP0_Wired = 0;
|
| 1484 |
env->CP0_Config0 = MIPS_CONFIG0; |
| 1485 |
#if defined (MIPS_CONFIG1)
|
| 1486 |
env->CP0_Config1 = MIPS_CONFIG1; |
| 1487 |
#endif
|
| 1488 |
#if defined (MIPS_CONFIG2)
|
| 1489 |
env->CP0_Config2 = MIPS_CONFIG2; |
| 1490 |
#endif
|
| 1491 |
#if defined (MIPS_CONFIG3)
|
| 1492 |
env->CP0_Config3 = MIPS_CONFIG3; |
| 1493 |
#endif
|
| 1494 |
env->CP0_Status = (1 << CP0St_CU0) | (1 << CP0St_BEV); |
| 1495 |
env->CP0_WatchLo = 0;
|
| 1496 |
env->hflags = MIPS_HFLAG_ERL; |
| 1497 |
/* Count register increments in debug mode, EJTAG version 1 */
|
| 1498 |
env->CP0_Debug = (1 << CP0DB_CNT) | (0x1 << CP0DB_VER); |
| 1499 |
env->CP0_PRid = MIPS_CPU; |
| 1500 |
env->exception_index = EXCP_NONE; |
| 1501 |
|
| 1502 |
cpu_single_env = env; |
| 1503 |
|
| 1504 |
return env;
|
| 1505 |
} |