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/*
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* m68k translation
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*
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* Copyright (c) 2005-2007 CodeSourcery
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* Written by Paul Brook
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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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* 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 "config.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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#include "m68k-qreg.h" |
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//#define DEBUG_DISPATCH 1
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static inline void qemu_assert(int cond, const char *msg) |
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{ |
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if (!cond) {
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fprintf (stderr, "badness: %s\n", msg);
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abort(); |
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} |
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} |
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/* internal defines */
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typedef struct DisasContext { |
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CPUM68KState *env; |
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target_ulong insn_pc; /* Start of the current instruction. */
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target_ulong pc; |
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int is_jmp;
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int cc_op;
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int user;
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uint32_t fpcr; |
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struct TranslationBlock *tb;
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int singlestep_enabled;
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} DisasContext; |
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#define DISAS_JUMP_NEXT 4 |
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#if defined(CONFIG_USER_ONLY)
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#define IS_USER(s) 1 |
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#else
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#define IS_USER(s) s->user
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#endif
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/* XXX: move that elsewhere */
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/* ??? Fix exceptions. */
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static void *gen_throws_exception; |
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#define gen_last_qop NULL |
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static uint16_t *gen_opc_ptr;
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static uint32_t *gen_opparam_ptr;
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extern FILE *logfile;
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extern int loglevel; |
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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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#include "gen-op.h" |
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#if defined(CONFIG_USER_ONLY)
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#define gen_st(s, name, addr, val) gen_op_st##name##_raw(addr, val) |
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#define gen_ld(s, name, val, addr) gen_op_ld##name##_raw(val, addr) |
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#else
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#define gen_st(s, name, addr, val) do { \ |
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if (IS_USER(s)) \
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gen_op_st##name##_user(addr, val); \ |
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else \
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gen_op_st##name##_kernel(addr, val); \ |
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} while (0) |
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#define gen_ld(s, name, val, addr) do { \ |
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if (IS_USER(s)) \
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gen_op_ld##name##_user(val, addr); \ |
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else \
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gen_op_ld##name##_kernel(val, addr); \ |
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} while (0) |
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#endif
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#include "op-hacks.h" |
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#define OS_BYTE 0 |
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#define OS_WORD 1 |
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#define OS_LONG 2 |
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#define OS_SINGLE 4 |
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#define OS_DOUBLE 5 |
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#define DREG(insn, pos) (((insn >> pos) & 7) + QREG_D0) |
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#define AREG(insn, pos) (((insn >> pos) & 7) + QREG_A0) |
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#define FREG(insn, pos) (((insn >> pos) & 7) + QREG_F0) |
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typedef void (*disas_proc)(DisasContext *, uint16_t); |
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#ifdef DEBUG_DISPATCH
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#define DISAS_INSN(name) \
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static void real_disas_##name (DisasContext *s, uint16_t insn); \ |
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static void disas_##name (DisasContext *s, uint16_t insn) { \ |
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if (logfile) fprintf(logfile, "Dispatch " #name "\n"); \ |
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real_disas_##name(s, insn); } \ |
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static void real_disas_##name (DisasContext *s, uint16_t insn) |
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#else
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#define DISAS_INSN(name) \
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static void disas_##name (DisasContext *s, uint16_t insn) |
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#endif
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/* Generate a load from the specified address. Narrow values are
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sign extended to full register width. */
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static inline int gen_load(DisasContext * s, int opsize, int addr, int sign) |
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{ |
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int tmp;
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switch(opsize) {
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case OS_BYTE:
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tmp = gen_new_qreg(QMODE_I32); |
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if (sign)
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gen_ld(s, 8s32, tmp, addr);
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else
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gen_ld(s, 8u32, tmp, addr);
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break;
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case OS_WORD:
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tmp = gen_new_qreg(QMODE_I32); |
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if (sign)
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gen_ld(s, 16s32, tmp, addr);
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else
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gen_ld(s, 16u32, tmp, addr);
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break;
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case OS_LONG:
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tmp = gen_new_qreg(QMODE_I32); |
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gen_ld(s, 32, tmp, addr);
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break;
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case OS_SINGLE:
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tmp = gen_new_qreg(QMODE_F32); |
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gen_ld(s, f32, tmp, addr); |
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break;
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case OS_DOUBLE:
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tmp = gen_new_qreg(QMODE_F64); |
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gen_ld(s, f64, tmp, addr); |
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break;
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default:
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qemu_assert(0, "bad load size"); |
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} |
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gen_throws_exception = gen_last_qop; |
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return tmp;
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} |
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/* Generate a store. */
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static inline void gen_store(DisasContext *s, int opsize, int addr, int val) |
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{ |
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switch(opsize) {
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case OS_BYTE:
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gen_st(s, 8, addr, val);
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break;
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case OS_WORD:
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gen_st(s, 16, addr, val);
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break;
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case OS_LONG:
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gen_st(s, 32, addr, val);
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break;
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case OS_SINGLE:
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gen_st(s, f32, addr, val); |
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break;
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case OS_DOUBLE:
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gen_st(s, f64, addr, val); |
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break;
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default:
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qemu_assert(0, "bad store size"); |
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} |
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gen_throws_exception = gen_last_qop; |
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} |
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/* Generate an unsigned load if VAL is 0 a signed load if val is -1,
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otherwise generate a store. */
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static int gen_ldst(DisasContext *s, int opsize, int addr, int val) |
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{ |
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if (val > 0) { |
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gen_store(s, opsize, addr, val); |
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return 0; |
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} else {
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return gen_load(s, opsize, addr, val != 0); |
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} |
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} |
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/* Read a 32-bit immediate constant. */
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static inline uint32_t read_im32(DisasContext *s) |
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{ |
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uint32_t im; |
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im = ((uint32_t)lduw_code(s->pc)) << 16;
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s->pc += 2;
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im |= lduw_code(s->pc); |
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s->pc += 2;
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return im;
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} |
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/* Calculate and address index. */
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static int gen_addr_index(uint16_t ext, int tmp) |
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{ |
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int add;
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int scale;
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add = (ext & 0x8000) ? AREG(ext, 12) : DREG(ext, 12); |
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if ((ext & 0x800) == 0) { |
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gen_op_ext16s32(tmp, add); |
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add = tmp; |
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} |
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scale = (ext >> 9) & 3; |
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if (scale != 0) { |
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gen_op_shl32(tmp, add, gen_im32(scale)); |
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add = tmp; |
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} |
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return add;
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} |
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/* Handle a base + index + displacement effective addresss. A base of
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-1 means pc-relative. */
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static int gen_lea_indexed(DisasContext *s, int opsize, int base) |
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{ |
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uint32_t offset; |
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uint16_t ext; |
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int add;
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int tmp;
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uint32_t bd, od; |
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offset = s->pc; |
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ext = lduw_code(s->pc); |
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s->pc += 2;
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if ((ext & 0x800) == 0 && !m68k_feature(s->env, M68K_FEATURE_WORD_INDEX)) |
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return -1; |
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if (ext & 0x100) { |
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/* full extension word format */
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if (!m68k_feature(s->env, M68K_FEATURE_EXT_FULL))
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return -1; |
254 |
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if ((ext & 0x30) > 0x10) { |
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/* base displacement */
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if ((ext & 0x30) == 0x20) { |
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bd = (int16_t)lduw_code(s->pc); |
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s->pc += 2;
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} else {
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bd = read_im32(s); |
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} |
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} else {
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bd = 0;
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} |
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tmp = gen_new_qreg(QMODE_I32); |
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if ((ext & 0x44) == 0) { |
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/* pre-index */
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add = gen_addr_index(ext, tmp); |
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} else {
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add = QREG_NULL; |
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} |
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if ((ext & 0x80) == 0) { |
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/* base not suppressed */
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if (base == -1) { |
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base = gen_im32(offset + bd); |
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bd = 0;
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} |
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if (add) {
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gen_op_add32(tmp, add, base); |
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add = tmp; |
282 |
} else {
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add = base; |
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} |
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} |
286 |
if (add) {
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if (bd != 0) { |
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gen_op_add32(tmp, add, gen_im32(bd)); |
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add = tmp; |
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} |
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} else {
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add = gen_im32(bd); |
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} |
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if ((ext & 3) != 0) { |
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/* memory indirect */
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base = gen_load(s, OS_LONG, add, 0);
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if ((ext & 0x44) == 4) { |
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add = gen_addr_index(ext, tmp); |
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gen_op_add32(tmp, add, base); |
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add = tmp; |
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} else {
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add = base; |
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} |
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if ((ext & 3) > 1) { |
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/* outer displacement */
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if ((ext & 3) == 2) { |
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od = (int16_t)lduw_code(s->pc); |
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s->pc += 2;
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} else {
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od = read_im32(s); |
311 |
} |
312 |
} else {
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od = 0;
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} |
315 |
if (od != 0) { |
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gen_op_add32(tmp, add, gen_im32(od)); |
317 |
add = tmp; |
318 |
} |
319 |
} |
320 |
} else {
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/* brief extension word format */
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tmp = gen_new_qreg(QMODE_I32); |
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add = gen_addr_index(ext, tmp); |
324 |
if (base != -1) { |
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gen_op_add32(tmp, add, base); |
326 |
if ((int8_t)ext)
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gen_op_add32(tmp, tmp, gen_im32((int8_t)ext)); |
328 |
} else {
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gen_op_add32(tmp, add, gen_im32(offset + (int8_t)ext)); |
330 |
} |
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add = tmp; |
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} |
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return add;
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} |
335 |
|
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/* Update the CPU env CC_OP state. */
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static inline void gen_flush_cc_op(DisasContext *s) |
338 |
{ |
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if (s->cc_op != CC_OP_DYNAMIC)
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gen_op_mov32(QREG_CC_OP, gen_im32(s->cc_op)); |
341 |
} |
342 |
|
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/* Evaluate all the CC flags. */
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344 |
static inline void gen_flush_flags(DisasContext *s) |
345 |
{ |
346 |
if (s->cc_op == CC_OP_FLAGS)
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return;
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gen_op_flush_flags(s->cc_op); |
349 |
s->cc_op = CC_OP_FLAGS; |
350 |
} |
351 |
|
352 |
static inline int opsize_bytes(int opsize) |
353 |
{ |
354 |
switch (opsize) {
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case OS_BYTE: return 1; |
356 |
case OS_WORD: return 2; |
357 |
case OS_LONG: return 4; |
358 |
case OS_SINGLE: return 4; |
359 |
case OS_DOUBLE: return 8; |
360 |
default:
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361 |
qemu_assert(0, "bad operand size"); |
362 |
} |
363 |
} |
364 |
|
365 |
/* Assign value to a register. If the width is less than the register width
|
366 |
only the low part of the register is set. */
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367 |
static void gen_partset_reg(int opsize, int reg, int val) |
368 |
{ |
369 |
int tmp;
|
370 |
switch (opsize) {
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371 |
case OS_BYTE:
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372 |
gen_op_and32(reg, reg, gen_im32(0xffffff00));
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373 |
tmp = gen_new_qreg(QMODE_I32); |
374 |
gen_op_and32(tmp, val, gen_im32(0xff));
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375 |
gen_op_or32(reg, reg, tmp); |
376 |
break;
|
377 |
case OS_WORD:
|
378 |
gen_op_and32(reg, reg, gen_im32(0xffff0000));
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379 |
tmp = gen_new_qreg(QMODE_I32); |
380 |
gen_op_and32(tmp, val, gen_im32(0xffff));
|
381 |
gen_op_or32(reg, reg, tmp); |
382 |
break;
|
383 |
case OS_LONG:
|
384 |
gen_op_mov32(reg, val); |
385 |
break;
|
386 |
case OS_SINGLE:
|
387 |
gen_op_pack_32_f32(reg, val); |
388 |
break;
|
389 |
default:
|
390 |
qemu_assert(0, "Bad operand size"); |
391 |
break;
|
392 |
} |
393 |
} |
394 |
|
395 |
/* Sign or zero extend a value. */
|
396 |
static inline int gen_extend(int val, int opsize, int sign) |
397 |
{ |
398 |
int tmp;
|
399 |
|
400 |
switch (opsize) {
|
401 |
case OS_BYTE:
|
402 |
tmp = gen_new_qreg(QMODE_I32); |
403 |
if (sign)
|
404 |
gen_op_ext8s32(tmp, val); |
405 |
else
|
406 |
gen_op_ext8u32(tmp, val); |
407 |
break;
|
408 |
case OS_WORD:
|
409 |
tmp = gen_new_qreg(QMODE_I32); |
410 |
if (sign)
|
411 |
gen_op_ext16s32(tmp, val); |
412 |
else
|
413 |
gen_op_ext16u32(tmp, val); |
414 |
break;
|
415 |
case OS_LONG:
|
416 |
tmp = val; |
417 |
break;
|
418 |
case OS_SINGLE:
|
419 |
tmp = gen_new_qreg(QMODE_F32); |
420 |
gen_op_pack_f32_32(tmp, val); |
421 |
break;
|
422 |
default:
|
423 |
qemu_assert(0, "Bad operand size"); |
424 |
} |
425 |
return tmp;
|
426 |
} |
427 |
|
428 |
/* Generate code for an "effective address". Does not adjust the base
|
429 |
register for autoincrememnt addressing modes. */
|
430 |
static int gen_lea(DisasContext *s, uint16_t insn, int opsize) |
431 |
{ |
432 |
int reg;
|
433 |
int tmp;
|
434 |
uint16_t ext; |
435 |
uint32_t offset; |
436 |
|
437 |
reg = insn & 7;
|
438 |
switch ((insn >> 3) & 7) { |
439 |
case 0: /* Data register direct. */ |
440 |
case 1: /* Address register direct. */ |
441 |
return -1; |
442 |
case 2: /* Indirect register */ |
443 |
case 3: /* Indirect postincrement. */ |
444 |
reg += QREG_A0; |
445 |
return reg;
|
446 |
case 4: /* Indirect predecrememnt. */ |
447 |
reg += QREG_A0; |
448 |
tmp = gen_new_qreg(QMODE_I32); |
449 |
gen_op_sub32(tmp, reg, gen_im32(opsize_bytes(opsize))); |
450 |
return tmp;
|
451 |
case 5: /* Indirect displacement. */ |
452 |
reg += QREG_A0; |
453 |
tmp = gen_new_qreg(QMODE_I32); |
454 |
ext = lduw_code(s->pc); |
455 |
s->pc += 2;
|
456 |
gen_op_add32(tmp, reg, gen_im32((int16_t)ext)); |
457 |
return tmp;
|
458 |
case 6: /* Indirect index + displacement. */ |
459 |
reg += QREG_A0; |
460 |
return gen_lea_indexed(s, opsize, reg);
|
461 |
case 7: /* Other */ |
462 |
switch (reg) {
|
463 |
case 0: /* Absolute short. */ |
464 |
offset = ldsw_code(s->pc); |
465 |
s->pc += 2;
|
466 |
return gen_im32(offset);
|
467 |
case 1: /* Absolute long. */ |
468 |
offset = read_im32(s); |
469 |
return gen_im32(offset);
|
470 |
case 2: /* pc displacement */ |
471 |
tmp = gen_new_qreg(QMODE_I32); |
472 |
offset = s->pc; |
473 |
offset += ldsw_code(s->pc); |
474 |
s->pc += 2;
|
475 |
return gen_im32(offset);
|
476 |
case 3: /* pc index+displacement. */ |
477 |
return gen_lea_indexed(s, opsize, -1); |
478 |
case 4: /* Immediate. */ |
479 |
default:
|
480 |
return -1; |
481 |
} |
482 |
} |
483 |
/* Should never happen. */
|
484 |
return -1; |
485 |
} |
486 |
|
487 |
/* Helper function for gen_ea. Reuse the computed address between the
|
488 |
for read/write operands. */
|
489 |
static inline int gen_ea_once(DisasContext *s, uint16_t insn, int opsize, |
490 |
int val, int *addrp) |
491 |
{ |
492 |
int tmp;
|
493 |
|
494 |
if (addrp && val > 0) { |
495 |
tmp = *addrp; |
496 |
} else {
|
497 |
tmp = gen_lea(s, insn, opsize); |
498 |
if (tmp == -1) |
499 |
return -1; |
500 |
if (addrp)
|
501 |
*addrp = tmp; |
502 |
} |
503 |
return gen_ldst(s, opsize, tmp, val);
|
504 |
} |
505 |
|
506 |
/* Generate code to load/store a value ito/from an EA. If VAL > 0 this is
|
507 |
a write otherwise it is a read (0 == sign extend, -1 == zero extend).
|
508 |
ADDRP is non-null for readwrite operands. */
|
509 |
static int gen_ea(DisasContext *s, uint16_t insn, int opsize, int val, |
510 |
int *addrp)
|
511 |
{ |
512 |
int reg;
|
513 |
int result;
|
514 |
uint32_t offset; |
515 |
|
516 |
reg = insn & 7;
|
517 |
switch ((insn >> 3) & 7) { |
518 |
case 0: /* Data register direct. */ |
519 |
reg += QREG_D0; |
520 |
if (val > 0) { |
521 |
gen_partset_reg(opsize, reg, val); |
522 |
return 0; |
523 |
} else {
|
524 |
return gen_extend(reg, opsize, val);
|
525 |
} |
526 |
case 1: /* Address register direct. */ |
527 |
reg += QREG_A0; |
528 |
if (val > 0) { |
529 |
gen_op_mov32(reg, val); |
530 |
return 0; |
531 |
} else {
|
532 |
return gen_extend(reg, opsize, val);
|
533 |
} |
534 |
case 2: /* Indirect register */ |
535 |
reg += QREG_A0; |
536 |
return gen_ldst(s, opsize, reg, val);
|
537 |
case 3: /* Indirect postincrement. */ |
538 |
reg += QREG_A0; |
539 |
result = gen_ldst(s, opsize, reg, val); |
540 |
/* ??? This is not exception safe. The instruction may still
|
541 |
fault after this point. */
|
542 |
if (val > 0 || !addrp) |
543 |
gen_op_add32(reg, reg, gen_im32(opsize_bytes(opsize))); |
544 |
return result;
|
545 |
case 4: /* Indirect predecrememnt. */ |
546 |
{ |
547 |
int tmp;
|
548 |
if (addrp && val > 0) { |
549 |
tmp = *addrp; |
550 |
} else {
|
551 |
tmp = gen_lea(s, insn, opsize); |
552 |
if (tmp == -1) |
553 |
return -1; |
554 |
if (addrp)
|
555 |
*addrp = tmp; |
556 |
} |
557 |
result = gen_ldst(s, opsize, tmp, val); |
558 |
/* ??? This is not exception safe. The instruction may still
|
559 |
fault after this point. */
|
560 |
if (val > 0 || !addrp) { |
561 |
reg += QREG_A0; |
562 |
gen_op_mov32(reg, tmp); |
563 |
} |
564 |
} |
565 |
return result;
|
566 |
case 5: /* Indirect displacement. */ |
567 |
case 6: /* Indirect index + displacement. */ |
568 |
return gen_ea_once(s, insn, opsize, val, addrp);
|
569 |
case 7: /* Other */ |
570 |
switch (reg) {
|
571 |
case 0: /* Absolute short. */ |
572 |
case 1: /* Absolute long. */ |
573 |
case 2: /* pc displacement */ |
574 |
case 3: /* pc index+displacement. */ |
575 |
return gen_ea_once(s, insn, opsize, val, addrp);
|
576 |
case 4: /* Immediate. */ |
577 |
/* Sign extend values for consistency. */
|
578 |
switch (opsize) {
|
579 |
case OS_BYTE:
|
580 |
if (val)
|
581 |
offset = ldsb_code(s->pc + 1);
|
582 |
else
|
583 |
offset = ldub_code(s->pc + 1);
|
584 |
s->pc += 2;
|
585 |
break;
|
586 |
case OS_WORD:
|
587 |
if (val)
|
588 |
offset = ldsw_code(s->pc); |
589 |
else
|
590 |
offset = lduw_code(s->pc); |
591 |
s->pc += 2;
|
592 |
break;
|
593 |
case OS_LONG:
|
594 |
offset = read_im32(s); |
595 |
break;
|
596 |
default:
|
597 |
qemu_assert(0, "Bad immediate operand"); |
598 |
} |
599 |
return gen_im32(offset);
|
600 |
default:
|
601 |
return -1; |
602 |
} |
603 |
} |
604 |
/* Should never happen. */
|
605 |
return -1; |
606 |
} |
607 |
|
608 |
static void gen_logic_cc(DisasContext *s, int val) |
609 |
{ |
610 |
gen_op_logic_cc(val); |
611 |
s->cc_op = CC_OP_LOGIC; |
612 |
} |
613 |
|
614 |
static void gen_jmpcc(DisasContext *s, int cond, int l1) |
615 |
{ |
616 |
int tmp;
|
617 |
|
618 |
gen_flush_flags(s); |
619 |
switch (cond) {
|
620 |
case 0: /* T */ |
621 |
gen_op_jmp(l1); |
622 |
break;
|
623 |
case 1: /* F */ |
624 |
break;
|
625 |
case 2: /* HI (!C && !Z) */ |
626 |
tmp = gen_new_qreg(QMODE_I32); |
627 |
gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_C | CCF_Z)); |
628 |
gen_op_jmp_z32(tmp, l1); |
629 |
break;
|
630 |
case 3: /* LS (C || Z) */ |
631 |
tmp = gen_new_qreg(QMODE_I32); |
632 |
gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_C | CCF_Z)); |
633 |
gen_op_jmp_nz32(tmp, l1); |
634 |
break;
|
635 |
case 4: /* CC (!C) */ |
636 |
tmp = gen_new_qreg(QMODE_I32); |
637 |
gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_C)); |
638 |
gen_op_jmp_z32(tmp, l1); |
639 |
break;
|
640 |
case 5: /* CS (C) */ |
641 |
tmp = gen_new_qreg(QMODE_I32); |
642 |
gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_C)); |
643 |
gen_op_jmp_nz32(tmp, l1); |
644 |
break;
|
645 |
case 6: /* NE (!Z) */ |
646 |
tmp = gen_new_qreg(QMODE_I32); |
647 |
gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_Z)); |
648 |
gen_op_jmp_z32(tmp, l1); |
649 |
break;
|
650 |
case 7: /* EQ (Z) */ |
651 |
tmp = gen_new_qreg(QMODE_I32); |
652 |
gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_Z)); |
653 |
gen_op_jmp_nz32(tmp, l1); |
654 |
break;
|
655 |
case 8: /* VC (!V) */ |
656 |
tmp = gen_new_qreg(QMODE_I32); |
657 |
gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_V)); |
658 |
gen_op_jmp_z32(tmp, l1); |
659 |
break;
|
660 |
case 9: /* VS (V) */ |
661 |
tmp = gen_new_qreg(QMODE_I32); |
662 |
gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_V)); |
663 |
gen_op_jmp_nz32(tmp, l1); |
664 |
break;
|
665 |
case 10: /* PL (!N) */ |
666 |
tmp = gen_new_qreg(QMODE_I32); |
667 |
gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_N)); |
668 |
gen_op_jmp_z32(tmp, l1); |
669 |
break;
|
670 |
case 11: /* MI (N) */ |
671 |
tmp = gen_new_qreg(QMODE_I32); |
672 |
gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_N)); |
673 |
gen_op_jmp_nz32(tmp, l1); |
674 |
break;
|
675 |
case 12: /* GE (!(N ^ V)) */ |
676 |
tmp = gen_new_qreg(QMODE_I32); |
677 |
gen_op_shr32(tmp, QREG_CC_DEST, gen_im32(2));
|
678 |
gen_op_xor32(tmp, tmp, QREG_CC_DEST); |
679 |
gen_op_and32(tmp, tmp, gen_im32(CCF_V)); |
680 |
gen_op_jmp_z32(tmp, l1); |
681 |
break;
|
682 |
case 13: /* LT (N ^ V) */ |
683 |
tmp = gen_new_qreg(QMODE_I32); |
684 |
gen_op_shr32(tmp, QREG_CC_DEST, gen_im32(2));
|
685 |
gen_op_xor32(tmp, tmp, QREG_CC_DEST); |
686 |
gen_op_and32(tmp, tmp, gen_im32(CCF_V)); |
687 |
gen_op_jmp_nz32(tmp, l1); |
688 |
break;
|
689 |
case 14: /* GT (!(Z || (N ^ V))) */ |
690 |
{ |
691 |
int l2;
|
692 |
l2 = gen_new_label(); |
693 |
tmp = gen_new_qreg(QMODE_I32); |
694 |
gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_Z)); |
695 |
gen_op_jmp_nz32(tmp, l2); |
696 |
tmp = gen_new_qreg(QMODE_I32); |
697 |
gen_op_shr32(tmp, QREG_CC_DEST, gen_im32(2));
|
698 |
gen_op_xor32(tmp, tmp, QREG_CC_DEST); |
699 |
gen_op_and32(tmp, tmp, gen_im32(CCF_V)); |
700 |
gen_op_jmp_nz32(tmp, l2); |
701 |
gen_op_jmp(l1); |
702 |
gen_set_label(l2); |
703 |
} |
704 |
break;
|
705 |
case 15: /* LE (Z || (N ^ V)) */ |
706 |
tmp = gen_new_qreg(QMODE_I32); |
707 |
gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_Z)); |
708 |
gen_op_jmp_nz32(tmp, l1); |
709 |
tmp = gen_new_qreg(QMODE_I32); |
710 |
gen_op_shr32(tmp, QREG_CC_DEST, gen_im32(2));
|
711 |
gen_op_xor32(tmp, tmp, QREG_CC_DEST); |
712 |
gen_op_and32(tmp, tmp, gen_im32(CCF_V)); |
713 |
gen_op_jmp_nz32(tmp, l1); |
714 |
break;
|
715 |
default:
|
716 |
/* Should ever happen. */
|
717 |
abort(); |
718 |
} |
719 |
} |
720 |
|
721 |
DISAS_INSN(scc) |
722 |
{ |
723 |
int l1;
|
724 |
int cond;
|
725 |
int reg;
|
726 |
|
727 |
l1 = gen_new_label(); |
728 |
cond = (insn >> 8) & 0xf; |
729 |
reg = DREG(insn, 0);
|
730 |
gen_op_and32(reg, reg, gen_im32(0xffffff00));
|
731 |
gen_jmpcc(s, cond ^ 1, l1);
|
732 |
gen_op_or32(reg, reg, gen_im32(0xff));
|
733 |
gen_set_label(l1); |
734 |
} |
735 |
|
736 |
/* Force a TB lookup after an instruction that changes the CPU state. */
|
737 |
static void gen_lookup_tb(DisasContext *s) |
738 |
{ |
739 |
gen_flush_cc_op(s); |
740 |
gen_op_mov32(QREG_PC, gen_im32(s->pc)); |
741 |
s->is_jmp = DISAS_UPDATE; |
742 |
} |
743 |
|
744 |
/* Generate a jump to to the address in qreg DEST. */
|
745 |
static void gen_jmp(DisasContext *s, int dest) |
746 |
{ |
747 |
gen_flush_cc_op(s); |
748 |
gen_op_mov32(QREG_PC, dest); |
749 |
s->is_jmp = DISAS_JUMP; |
750 |
} |
751 |
|
752 |
static void gen_exception(DisasContext *s, uint32_t where, int nr) |
753 |
{ |
754 |
gen_flush_cc_op(s); |
755 |
gen_jmp(s, gen_im32(where)); |
756 |
gen_op_raise_exception(nr); |
757 |
} |
758 |
|
759 |
static inline void gen_addr_fault(DisasContext *s) |
760 |
{ |
761 |
gen_exception(s, s->insn_pc, EXCP_ADDRESS); |
762 |
} |
763 |
|
764 |
#define SRC_EA(result, opsize, val, addrp) do { \ |
765 |
result = gen_ea(s, insn, opsize, val, addrp); \ |
766 |
if (result == -1) { \ |
767 |
gen_addr_fault(s); \ |
768 |
return; \
|
769 |
} \ |
770 |
} while (0) |
771 |
|
772 |
#define DEST_EA(insn, opsize, val, addrp) do { \ |
773 |
int ea_result = gen_ea(s, insn, opsize, val, addrp); \
|
774 |
if (ea_result == -1) { \ |
775 |
gen_addr_fault(s); \ |
776 |
return; \
|
777 |
} \ |
778 |
} while (0) |
779 |
|
780 |
/* Generate a jump to an immediate address. */
|
781 |
static void gen_jmp_tb(DisasContext *s, int n, uint32_t dest) |
782 |
{ |
783 |
TranslationBlock *tb; |
784 |
|
785 |
tb = s->tb; |
786 |
if (__builtin_expect (s->singlestep_enabled, 0)) { |
787 |
gen_exception(s, dest, EXCP_DEBUG); |
788 |
} else if ((tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK) || |
789 |
(s->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK)) { |
790 |
gen_op_goto_tb(0, n, (long)tb); |
791 |
gen_op_mov32(QREG_PC, gen_im32(dest)); |
792 |
gen_op_mov32(QREG_T0, gen_im32((long)tb + n));
|
793 |
gen_op_exit_tb(); |
794 |
} else {
|
795 |
gen_jmp(s, gen_im32(dest)); |
796 |
gen_op_mov32(QREG_T0, gen_im32(0));
|
797 |
gen_op_exit_tb(); |
798 |
} |
799 |
s->is_jmp = DISAS_TB_JUMP; |
800 |
} |
801 |
|
802 |
DISAS_INSN(undef_mac) |
803 |
{ |
804 |
gen_exception(s, s->pc - 2, EXCP_LINEA);
|
805 |
} |
806 |
|
807 |
DISAS_INSN(undef_fpu) |
808 |
{ |
809 |
gen_exception(s, s->pc - 2, EXCP_LINEF);
|
810 |
} |
811 |
|
812 |
DISAS_INSN(undef) |
813 |
{ |
814 |
gen_exception(s, s->pc - 2, EXCP_UNSUPPORTED);
|
815 |
cpu_abort(cpu_single_env, "Illegal instruction: %04x @ %08x",
|
816 |
insn, s->pc - 2);
|
817 |
} |
818 |
|
819 |
DISAS_INSN(mulw) |
820 |
{ |
821 |
int reg;
|
822 |
int tmp;
|
823 |
int src;
|
824 |
int sign;
|
825 |
|
826 |
sign = (insn & 0x100) != 0; |
827 |
reg = DREG(insn, 9);
|
828 |
tmp = gen_new_qreg(QMODE_I32); |
829 |
if (sign)
|
830 |
gen_op_ext16s32(tmp, reg); |
831 |
else
|
832 |
gen_op_ext16u32(tmp, reg); |
833 |
SRC_EA(src, OS_WORD, sign ? -1 : 0, NULL); |
834 |
gen_op_mul32(tmp, tmp, src); |
835 |
gen_op_mov32(reg, tmp); |
836 |
/* Unlike m68k, coldfire always clears the overflow bit. */
|
837 |
gen_logic_cc(s, tmp); |
838 |
} |
839 |
|
840 |
DISAS_INSN(divw) |
841 |
{ |
842 |
int reg;
|
843 |
int tmp;
|
844 |
int src;
|
845 |
int sign;
|
846 |
|
847 |
sign = (insn & 0x100) != 0; |
848 |
reg = DREG(insn, 9);
|
849 |
if (sign) {
|
850 |
gen_op_ext16s32(QREG_DIV1, reg); |
851 |
} else {
|
852 |
gen_op_ext16u32(QREG_DIV1, reg); |
853 |
} |
854 |
SRC_EA(src, OS_WORD, sign ? -1 : 0, NULL); |
855 |
gen_op_mov32(QREG_DIV2, src); |
856 |
if (sign) {
|
857 |
gen_op_divs(1);
|
858 |
} else {
|
859 |
gen_op_divu(1);
|
860 |
} |
861 |
|
862 |
tmp = gen_new_qreg(QMODE_I32); |
863 |
src = gen_new_qreg(QMODE_I32); |
864 |
gen_op_ext16u32(tmp, QREG_DIV1); |
865 |
gen_op_shl32(src, QREG_DIV2, gen_im32(16));
|
866 |
gen_op_or32(reg, tmp, src); |
867 |
gen_op_flags_set(); |
868 |
s->cc_op = CC_OP_FLAGS; |
869 |
} |
870 |
|
871 |
DISAS_INSN(divl) |
872 |
{ |
873 |
int num;
|
874 |
int den;
|
875 |
int reg;
|
876 |
uint16_t ext; |
877 |
|
878 |
ext = lduw_code(s->pc); |
879 |
s->pc += 2;
|
880 |
if (ext & 0x87f8) { |
881 |
gen_exception(s, s->pc - 4, EXCP_UNSUPPORTED);
|
882 |
return;
|
883 |
} |
884 |
num = DREG(ext, 12);
|
885 |
reg = DREG(ext, 0);
|
886 |
gen_op_mov32(QREG_DIV1, num); |
887 |
SRC_EA(den, OS_LONG, 0, NULL); |
888 |
gen_op_mov32(QREG_DIV2, den); |
889 |
if (ext & 0x0800) { |
890 |
gen_op_divs(2);
|
891 |
} else {
|
892 |
gen_op_divu(2);
|
893 |
} |
894 |
if (num == reg) {
|
895 |
/* div */
|
896 |
gen_op_mov32 (reg, QREG_DIV1); |
897 |
} else {
|
898 |
/* rem */
|
899 |
gen_op_mov32 (reg, QREG_DIV2); |
900 |
} |
901 |
gen_op_flags_set(); |
902 |
s->cc_op = CC_OP_FLAGS; |
903 |
} |
904 |
|
905 |
DISAS_INSN(addsub) |
906 |
{ |
907 |
int reg;
|
908 |
int dest;
|
909 |
int src;
|
910 |
int tmp;
|
911 |
int addr;
|
912 |
int add;
|
913 |
|
914 |
add = (insn & 0x4000) != 0; |
915 |
reg = DREG(insn, 9);
|
916 |
dest = gen_new_qreg(QMODE_I32); |
917 |
if (insn & 0x100) { |
918 |
SRC_EA(tmp, OS_LONG, 0, &addr);
|
919 |
src = reg; |
920 |
} else {
|
921 |
tmp = reg; |
922 |
SRC_EA(src, OS_LONG, 0, NULL); |
923 |
} |
924 |
if (add) {
|
925 |
gen_op_add32(dest, tmp, src); |
926 |
gen_op_update_xflag_lt(dest, src); |
927 |
s->cc_op = CC_OP_ADD; |
928 |
} else {
|
929 |
gen_op_update_xflag_lt(tmp, src); |
930 |
gen_op_sub32(dest, tmp, src); |
931 |
s->cc_op = CC_OP_SUB; |
932 |
} |
933 |
gen_op_update_cc_add(dest, src); |
934 |
if (insn & 0x100) { |
935 |
DEST_EA(insn, OS_LONG, dest, &addr); |
936 |
} else {
|
937 |
gen_op_mov32(reg, dest); |
938 |
} |
939 |
} |
940 |
|
941 |
|
942 |
/* Reverse the order of the bits in REG. */
|
943 |
DISAS_INSN(bitrev) |
944 |
{ |
945 |
int val;
|
946 |
int tmp1;
|
947 |
int tmp2;
|
948 |
int reg;
|
949 |
|
950 |
val = gen_new_qreg(QMODE_I32); |
951 |
tmp1 = gen_new_qreg(QMODE_I32); |
952 |
tmp2 = gen_new_qreg(QMODE_I32); |
953 |
reg = DREG(insn, 0);
|
954 |
gen_op_mov32(val, reg); |
955 |
/* Reverse bits within each nibble. */
|
956 |
gen_op_shl32(tmp1, val, gen_im32(3));
|
957 |
gen_op_and32(tmp1, tmp1, gen_im32(0x88888888));
|
958 |
gen_op_shl32(tmp2, val, gen_im32(1));
|
959 |
gen_op_and32(tmp2, tmp2, gen_im32(0x44444444));
|
960 |
gen_op_or32(tmp1, tmp1, tmp2); |
961 |
gen_op_shr32(tmp2, val, gen_im32(1));
|
962 |
gen_op_and32(tmp2, tmp2, gen_im32(0x22222222));
|
963 |
gen_op_or32(tmp1, tmp1, tmp2); |
964 |
gen_op_shr32(tmp2, val, gen_im32(3));
|
965 |
gen_op_and32(tmp2, tmp2, gen_im32(0x11111111));
|
966 |
gen_op_or32(tmp1, tmp1, tmp2); |
967 |
/* Reverse nibbles withing bytes. */
|
968 |
gen_op_shl32(val, tmp1, gen_im32(4));
|
969 |
gen_op_and32(val, val, gen_im32(0xf0f0f0f0));
|
970 |
gen_op_shr32(tmp2, tmp1, gen_im32(4));
|
971 |
gen_op_and32(tmp2, tmp2, gen_im32(0x0f0f0f0f));
|
972 |
gen_op_or32(val, val, tmp2); |
973 |
/* Reverse bytes. */
|
974 |
gen_op_bswap32(reg, val); |
975 |
gen_op_mov32(reg, val); |
976 |
} |
977 |
|
978 |
DISAS_INSN(bitop_reg) |
979 |
{ |
980 |
int opsize;
|
981 |
int op;
|
982 |
int src1;
|
983 |
int src2;
|
984 |
int tmp;
|
985 |
int addr;
|
986 |
int dest;
|
987 |
|
988 |
if ((insn & 0x38) != 0) |
989 |
opsize = OS_BYTE; |
990 |
else
|
991 |
opsize = OS_LONG; |
992 |
op = (insn >> 6) & 3; |
993 |
SRC_EA(src1, opsize, 0, op ? &addr: NULL); |
994 |
src2 = DREG(insn, 9);
|
995 |
dest = gen_new_qreg(QMODE_I32); |
996 |
|
997 |
gen_flush_flags(s); |
998 |
tmp = gen_new_qreg(QMODE_I32); |
999 |
if (opsize == OS_BYTE)
|
1000 |
gen_op_and32(tmp, src2, gen_im32(7));
|
1001 |
else
|
1002 |
gen_op_and32(tmp, src2, gen_im32(31));
|
1003 |
src2 = tmp; |
1004 |
tmp = gen_new_qreg(QMODE_I32); |
1005 |
gen_op_shl32(tmp, gen_im32(1), src2);
|
1006 |
|
1007 |
gen_op_btest(src1, tmp); |
1008 |
switch (op) {
|
1009 |
case 1: /* bchg */ |
1010 |
gen_op_xor32(dest, src1, tmp); |
1011 |
break;
|
1012 |
case 2: /* bclr */ |
1013 |
gen_op_not32(tmp, tmp); |
1014 |
gen_op_and32(dest, src1, tmp); |
1015 |
break;
|
1016 |
case 3: /* bset */ |
1017 |
gen_op_or32(dest, src1, tmp); |
1018 |
break;
|
1019 |
default: /* btst */ |
1020 |
break;
|
1021 |
} |
1022 |
if (op)
|
1023 |
DEST_EA(insn, opsize, dest, &addr); |
1024 |
} |
1025 |
|
1026 |
DISAS_INSN(sats) |
1027 |
{ |
1028 |
int reg;
|
1029 |
int tmp;
|
1030 |
int l1;
|
1031 |
|
1032 |
reg = DREG(insn, 0);
|
1033 |
tmp = gen_new_qreg(QMODE_I32); |
1034 |
gen_flush_flags(s); |
1035 |
gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_V)); |
1036 |
l1 = gen_new_label(); |
1037 |
gen_op_jmp_z32(tmp, l1); |
1038 |
tmp = gen_new_qreg(QMODE_I32); |
1039 |
gen_op_shr32(tmp, reg, gen_im32(31));
|
1040 |
gen_op_xor32(tmp, tmp, gen_im32(0x80000000));
|
1041 |
gen_op_mov32(reg, tmp); |
1042 |
gen_set_label(l1); |
1043 |
gen_logic_cc(s, tmp); |
1044 |
} |
1045 |
|
1046 |
static void gen_push(DisasContext *s, int val) |
1047 |
{ |
1048 |
int tmp;
|
1049 |
|
1050 |
tmp = gen_new_qreg(QMODE_I32); |
1051 |
gen_op_sub32(tmp, QREG_SP, gen_im32(4));
|
1052 |
gen_store(s, OS_LONG, tmp, val); |
1053 |
gen_op_mov32(QREG_SP, tmp); |
1054 |
} |
1055 |
|
1056 |
DISAS_INSN(movem) |
1057 |
{ |
1058 |
int addr;
|
1059 |
int i;
|
1060 |
uint16_t mask; |
1061 |
int reg;
|
1062 |
int tmp;
|
1063 |
int is_load;
|
1064 |
|
1065 |
mask = lduw_code(s->pc); |
1066 |
s->pc += 2;
|
1067 |
tmp = gen_lea(s, insn, OS_LONG); |
1068 |
if (tmp == -1) { |
1069 |
gen_addr_fault(s); |
1070 |
return;
|
1071 |
} |
1072 |
addr = gen_new_qreg(QMODE_I32); |
1073 |
gen_op_mov32(addr, tmp); |
1074 |
is_load = ((insn & 0x0400) != 0); |
1075 |
for (i = 0; i < 16; i++, mask >>= 1) { |
1076 |
if (mask & 1) { |
1077 |
if (i < 8) |
1078 |
reg = DREG(i, 0);
|
1079 |
else
|
1080 |
reg = AREG(i, 0);
|
1081 |
if (is_load) {
|
1082 |
tmp = gen_load(s, OS_LONG, addr, 0);
|
1083 |
gen_op_mov32(reg, tmp); |
1084 |
} else {
|
1085 |
gen_store(s, OS_LONG, addr, reg); |
1086 |
} |
1087 |
if (mask != 1) |
1088 |
gen_op_add32(addr, addr, gen_im32(4));
|
1089 |
} |
1090 |
} |
1091 |
} |
1092 |
|
1093 |
DISAS_INSN(bitop_im) |
1094 |
{ |
1095 |
int opsize;
|
1096 |
int op;
|
1097 |
int src1;
|
1098 |
uint32_t mask; |
1099 |
int bitnum;
|
1100 |
int tmp;
|
1101 |
int addr;
|
1102 |
int dest;
|
1103 |
|
1104 |
if ((insn & 0x38) != 0) |
1105 |
opsize = OS_BYTE; |
1106 |
else
|
1107 |
opsize = OS_LONG; |
1108 |
op = (insn >> 6) & 3; |
1109 |
|
1110 |
bitnum = lduw_code(s->pc); |
1111 |
s->pc += 2;
|
1112 |
if (bitnum & 0xff00) { |
1113 |
disas_undef(s, insn); |
1114 |
return;
|
1115 |
} |
1116 |
|
1117 |
SRC_EA(src1, opsize, 0, op ? &addr: NULL); |
1118 |
|
1119 |
gen_flush_flags(s); |
1120 |
tmp = gen_new_qreg(QMODE_I32); |
1121 |
if (opsize == OS_BYTE)
|
1122 |
bitnum &= 7;
|
1123 |
else
|
1124 |
bitnum &= 31;
|
1125 |
mask = 1 << bitnum;
|
1126 |
|
1127 |
gen_op_btest(src1, gen_im32(mask)); |
1128 |
if (op)
|
1129 |
dest = gen_new_qreg(QMODE_I32); |
1130 |
else
|
1131 |
dest = -1;
|
1132 |
|
1133 |
switch (op) {
|
1134 |
case 1: /* bchg */ |
1135 |
gen_op_xor32(dest, src1, gen_im32(mask)); |
1136 |
break;
|
1137 |
case 2: /* bclr */ |
1138 |
gen_op_and32(dest, src1, gen_im32(~mask)); |
1139 |
break;
|
1140 |
case 3: /* bset */ |
1141 |
gen_op_or32(dest, src1, gen_im32(mask)); |
1142 |
break;
|
1143 |
default: /* btst */ |
1144 |
break;
|
1145 |
} |
1146 |
if (op)
|
1147 |
DEST_EA(insn, opsize, dest, &addr); |
1148 |
} |
1149 |
|
1150 |
DISAS_INSN(arith_im) |
1151 |
{ |
1152 |
int op;
|
1153 |
int src1;
|
1154 |
int dest;
|
1155 |
int src2;
|
1156 |
int addr;
|
1157 |
|
1158 |
op = (insn >> 9) & 7; |
1159 |
SRC_EA(src1, OS_LONG, 0, (op == 6) ? NULL : &addr); |
1160 |
src2 = gen_im32(read_im32(s)); |
1161 |
dest = gen_new_qreg(QMODE_I32); |
1162 |
switch (op) {
|
1163 |
case 0: /* ori */ |
1164 |
gen_op_or32(dest, src1, src2); |
1165 |
gen_logic_cc(s, dest); |
1166 |
break;
|
1167 |
case 1: /* andi */ |
1168 |
gen_op_and32(dest, src1, src2); |
1169 |
gen_logic_cc(s, dest); |
1170 |
break;
|
1171 |
case 2: /* subi */ |
1172 |
gen_op_mov32(dest, src1); |
1173 |
gen_op_update_xflag_lt(dest, src2); |
1174 |
gen_op_sub32(dest, dest, src2); |
1175 |
gen_op_update_cc_add(dest, src2); |
1176 |
s->cc_op = CC_OP_SUB; |
1177 |
break;
|
1178 |
case 3: /* addi */ |
1179 |
gen_op_mov32(dest, src1); |
1180 |
gen_op_add32(dest, dest, src2); |
1181 |
gen_op_update_cc_add(dest, src2); |
1182 |
gen_op_update_xflag_lt(dest, src2); |
1183 |
s->cc_op = CC_OP_ADD; |
1184 |
break;
|
1185 |
case 5: /* eori */ |
1186 |
gen_op_xor32(dest, src1, src2); |
1187 |
gen_logic_cc(s, dest); |
1188 |
break;
|
1189 |
case 6: /* cmpi */ |
1190 |
gen_op_mov32(dest, src1); |
1191 |
gen_op_sub32(dest, dest, src2); |
1192 |
gen_op_update_cc_add(dest, src2); |
1193 |
s->cc_op = CC_OP_SUB; |
1194 |
break;
|
1195 |
default:
|
1196 |
abort(); |
1197 |
} |
1198 |
if (op != 6) { |
1199 |
DEST_EA(insn, OS_LONG, dest, &addr); |
1200 |
} |
1201 |
} |
1202 |
|
1203 |
DISAS_INSN(byterev) |
1204 |
{ |
1205 |
int reg;
|
1206 |
|
1207 |
reg = DREG(insn, 0);
|
1208 |
gen_op_bswap32(reg, reg); |
1209 |
} |
1210 |
|
1211 |
DISAS_INSN(move) |
1212 |
{ |
1213 |
int src;
|
1214 |
int dest;
|
1215 |
int op;
|
1216 |
int opsize;
|
1217 |
|
1218 |
switch (insn >> 12) { |
1219 |
case 1: /* move.b */ |
1220 |
opsize = OS_BYTE; |
1221 |
break;
|
1222 |
case 2: /* move.l */ |
1223 |
opsize = OS_LONG; |
1224 |
break;
|
1225 |
case 3: /* move.w */ |
1226 |
opsize = OS_WORD; |
1227 |
break;
|
1228 |
default:
|
1229 |
abort(); |
1230 |
} |
1231 |
SRC_EA(src, opsize, -1, NULL); |
1232 |
op = (insn >> 6) & 7; |
1233 |
if (op == 1) { |
1234 |
/* movea */
|
1235 |
/* The value will already have been sign extended. */
|
1236 |
dest = AREG(insn, 9);
|
1237 |
gen_op_mov32(dest, src); |
1238 |
} else {
|
1239 |
/* normal move */
|
1240 |
uint16_t dest_ea; |
1241 |
dest_ea = ((insn >> 9) & 7) | (op << 3); |
1242 |
DEST_EA(dest_ea, opsize, src, NULL);
|
1243 |
/* This will be correct because loads sign extend. */
|
1244 |
gen_logic_cc(s, src); |
1245 |
} |
1246 |
} |
1247 |
|
1248 |
DISAS_INSN(negx) |
1249 |
{ |
1250 |
int reg;
|
1251 |
int dest;
|
1252 |
int tmp;
|
1253 |
|
1254 |
gen_flush_flags(s); |
1255 |
reg = DREG(insn, 0);
|
1256 |
dest = gen_new_qreg(QMODE_I32); |
1257 |
gen_op_mov32 (dest, gen_im32(0));
|
1258 |
gen_op_subx_cc(dest, reg); |
1259 |
/* !Z is sticky. */
|
1260 |
tmp = gen_new_qreg(QMODE_I32); |
1261 |
gen_op_mov32 (tmp, QREG_CC_DEST); |
1262 |
gen_op_update_cc_add(dest, reg); |
1263 |
gen_op_mov32(reg, dest); |
1264 |
s->cc_op = CC_OP_DYNAMIC; |
1265 |
gen_flush_flags(s); |
1266 |
gen_op_or32(tmp, tmp, gen_im32(~CCF_Z)); |
1267 |
gen_op_and32(QREG_CC_DEST, QREG_CC_DEST, tmp); |
1268 |
s->cc_op = CC_OP_FLAGS; |
1269 |
} |
1270 |
|
1271 |
DISAS_INSN(lea) |
1272 |
{ |
1273 |
int reg;
|
1274 |
int tmp;
|
1275 |
|
1276 |
reg = AREG(insn, 9);
|
1277 |
tmp = gen_lea(s, insn, OS_LONG); |
1278 |
if (tmp == -1) { |
1279 |
gen_addr_fault(s); |
1280 |
return;
|
1281 |
} |
1282 |
gen_op_mov32(reg, tmp); |
1283 |
} |
1284 |
|
1285 |
DISAS_INSN(clr) |
1286 |
{ |
1287 |
int opsize;
|
1288 |
|
1289 |
switch ((insn >> 6) & 3) { |
1290 |
case 0: /* clr.b */ |
1291 |
opsize = OS_BYTE; |
1292 |
break;
|
1293 |
case 1: /* clr.w */ |
1294 |
opsize = OS_WORD; |
1295 |
break;
|
1296 |
case 2: /* clr.l */ |
1297 |
opsize = OS_LONG; |
1298 |
break;
|
1299 |
default:
|
1300 |
abort(); |
1301 |
} |
1302 |
DEST_EA(insn, opsize, gen_im32(0), NULL); |
1303 |
gen_logic_cc(s, gen_im32(0));
|
1304 |
} |
1305 |
|
1306 |
static int gen_get_ccr(DisasContext *s) |
1307 |
{ |
1308 |
int dest;
|
1309 |
|
1310 |
gen_flush_flags(s); |
1311 |
dest = gen_new_qreg(QMODE_I32); |
1312 |
gen_op_get_xflag(dest); |
1313 |
gen_op_shl32(dest, dest, gen_im32(4));
|
1314 |
gen_op_or32(dest, dest, QREG_CC_DEST); |
1315 |
return dest;
|
1316 |
} |
1317 |
|
1318 |
DISAS_INSN(move_from_ccr) |
1319 |
{ |
1320 |
int reg;
|
1321 |
int ccr;
|
1322 |
|
1323 |
ccr = gen_get_ccr(s); |
1324 |
reg = DREG(insn, 0);
|
1325 |
gen_partset_reg(OS_WORD, reg, ccr); |
1326 |
} |
1327 |
|
1328 |
DISAS_INSN(neg) |
1329 |
{ |
1330 |
int reg;
|
1331 |
int src1;
|
1332 |
|
1333 |
reg = DREG(insn, 0);
|
1334 |
src1 = gen_new_qreg(QMODE_I32); |
1335 |
gen_op_mov32(src1, reg); |
1336 |
gen_op_neg32(reg, src1); |
1337 |
s->cc_op = CC_OP_SUB; |
1338 |
gen_op_update_cc_add(reg, src1); |
1339 |
gen_op_update_xflag_lt(gen_im32(0), src1);
|
1340 |
s->cc_op = CC_OP_SUB; |
1341 |
} |
1342 |
|
1343 |
static void gen_set_sr_im(DisasContext *s, uint16_t val, int ccr_only) |
1344 |
{ |
1345 |
gen_op_logic_cc(gen_im32(val & 0xf));
|
1346 |
gen_op_update_xflag_tst(gen_im32((val & 0x10) >> 4)); |
1347 |
if (!ccr_only) {
|
1348 |
gen_op_set_sr(gen_im32(val & 0xff00));
|
1349 |
} |
1350 |
} |
1351 |
|
1352 |
static void gen_set_sr(DisasContext *s, uint16_t insn, int ccr_only) |
1353 |
{ |
1354 |
int src1;
|
1355 |
int reg;
|
1356 |
|
1357 |
s->cc_op = CC_OP_FLAGS; |
1358 |
if ((insn & 0x38) == 0) |
1359 |
{ |
1360 |
src1 = gen_new_qreg(QMODE_I32); |
1361 |
reg = DREG(insn, 0);
|
1362 |
gen_op_and32(src1, reg, gen_im32(0xf));
|
1363 |
gen_op_logic_cc(src1); |
1364 |
gen_op_shr32(src1, reg, gen_im32(4));
|
1365 |
gen_op_and32(src1, src1, gen_im32(1));
|
1366 |
gen_op_update_xflag_tst(src1); |
1367 |
if (!ccr_only) {
|
1368 |
gen_op_set_sr(reg); |
1369 |
} |
1370 |
} |
1371 |
else if ((insn & 0x3f) == 0x3c) |
1372 |
{ |
1373 |
uint16_t val; |
1374 |
val = lduw_code(s->pc); |
1375 |
s->pc += 2;
|
1376 |
gen_set_sr_im(s, val, ccr_only); |
1377 |
} |
1378 |
else
|
1379 |
disas_undef(s, insn); |
1380 |
} |
1381 |
|
1382 |
DISAS_INSN(move_to_ccr) |
1383 |
{ |
1384 |
gen_set_sr(s, insn, 1);
|
1385 |
} |
1386 |
|
1387 |
DISAS_INSN(not) |
1388 |
{ |
1389 |
int reg;
|
1390 |
|
1391 |
reg = DREG(insn, 0);
|
1392 |
gen_op_not32(reg, reg); |
1393 |
gen_logic_cc(s, reg); |
1394 |
} |
1395 |
|
1396 |
DISAS_INSN(swap) |
1397 |
{ |
1398 |
int dest;
|
1399 |
int src1;
|
1400 |
int src2;
|
1401 |
int reg;
|
1402 |
|
1403 |
dest = gen_new_qreg(QMODE_I32); |
1404 |
src1 = gen_new_qreg(QMODE_I32); |
1405 |
src2 = gen_new_qreg(QMODE_I32); |
1406 |
reg = DREG(insn, 0);
|
1407 |
gen_op_shl32(src1, reg, gen_im32(16));
|
1408 |
gen_op_shr32(src2, reg, gen_im32(16));
|
1409 |
gen_op_or32(dest, src1, src2); |
1410 |
gen_op_mov32(reg, dest); |
1411 |
gen_logic_cc(s, dest); |
1412 |
} |
1413 |
|
1414 |
DISAS_INSN(pea) |
1415 |
{ |
1416 |
int tmp;
|
1417 |
|
1418 |
tmp = gen_lea(s, insn, OS_LONG); |
1419 |
if (tmp == -1) { |
1420 |
gen_addr_fault(s); |
1421 |
return;
|
1422 |
} |
1423 |
gen_push(s, tmp); |
1424 |
} |
1425 |
|
1426 |
DISAS_INSN(ext) |
1427 |
{ |
1428 |
int reg;
|
1429 |
int op;
|
1430 |
int tmp;
|
1431 |
|
1432 |
reg = DREG(insn, 0);
|
1433 |
op = (insn >> 6) & 7; |
1434 |
tmp = gen_new_qreg(QMODE_I32); |
1435 |
if (op == 3) |
1436 |
gen_op_ext16s32(tmp, reg); |
1437 |
else
|
1438 |
gen_op_ext8s32(tmp, reg); |
1439 |
if (op == 2) |
1440 |
gen_partset_reg(OS_WORD, reg, tmp); |
1441 |
else
|
1442 |
gen_op_mov32(reg, tmp); |
1443 |
gen_logic_cc(s, tmp); |
1444 |
} |
1445 |
|
1446 |
DISAS_INSN(tst) |
1447 |
{ |
1448 |
int opsize;
|
1449 |
int tmp;
|
1450 |
|
1451 |
switch ((insn >> 6) & 3) { |
1452 |
case 0: /* tst.b */ |
1453 |
opsize = OS_BYTE; |
1454 |
break;
|
1455 |
case 1: /* tst.w */ |
1456 |
opsize = OS_WORD; |
1457 |
break;
|
1458 |
case 2: /* tst.l */ |
1459 |
opsize = OS_LONG; |
1460 |
break;
|
1461 |
default:
|
1462 |
abort(); |
1463 |
} |
1464 |
SRC_EA(tmp, opsize, -1, NULL); |
1465 |
gen_logic_cc(s, tmp); |
1466 |
} |
1467 |
|
1468 |
DISAS_INSN(pulse) |
1469 |
{ |
1470 |
/* Implemented as a NOP. */
|
1471 |
} |
1472 |
|
1473 |
DISAS_INSN(illegal) |
1474 |
{ |
1475 |
gen_exception(s, s->pc - 2, EXCP_ILLEGAL);
|
1476 |
} |
1477 |
|
1478 |
/* ??? This should be atomic. */
|
1479 |
DISAS_INSN(tas) |
1480 |
{ |
1481 |
int dest;
|
1482 |
int src1;
|
1483 |
int addr;
|
1484 |
|
1485 |
dest = gen_new_qreg(QMODE_I32); |
1486 |
SRC_EA(src1, OS_BYTE, -1, &addr);
|
1487 |
gen_logic_cc(s, src1); |
1488 |
gen_op_or32(dest, src1, gen_im32(0x80));
|
1489 |
DEST_EA(insn, OS_BYTE, dest, &addr); |
1490 |
} |
1491 |
|
1492 |
DISAS_INSN(mull) |
1493 |
{ |
1494 |
uint16_t ext; |
1495 |
int reg;
|
1496 |
int src1;
|
1497 |
int dest;
|
1498 |
|
1499 |
/* The upper 32 bits of the product are discarded, so
|
1500 |
muls.l and mulu.l are functionally equivalent. */
|
1501 |
ext = lduw_code(s->pc); |
1502 |
s->pc += 2;
|
1503 |
if (ext & 0x87ff) { |
1504 |
gen_exception(s, s->pc - 4, EXCP_UNSUPPORTED);
|
1505 |
return;
|
1506 |
} |
1507 |
reg = DREG(ext, 12);
|
1508 |
SRC_EA(src1, OS_LONG, 0, NULL); |
1509 |
dest = gen_new_qreg(QMODE_I32); |
1510 |
gen_op_mul32(dest, src1, reg); |
1511 |
gen_op_mov32(reg, dest); |
1512 |
/* Unlike m68k, coldfire always clears the overflow bit. */
|
1513 |
gen_logic_cc(s, dest); |
1514 |
} |
1515 |
|
1516 |
DISAS_INSN(link) |
1517 |
{ |
1518 |
int16_t offset; |
1519 |
int reg;
|
1520 |
int tmp;
|
1521 |
|
1522 |
offset = ldsw_code(s->pc); |
1523 |
s->pc += 2;
|
1524 |
reg = AREG(insn, 0);
|
1525 |
tmp = gen_new_qreg(QMODE_I32); |
1526 |
gen_op_sub32(tmp, QREG_SP, gen_im32(4));
|
1527 |
gen_store(s, OS_LONG, tmp, reg); |
1528 |
if (reg != QREG_SP)
|
1529 |
gen_op_mov32(reg, tmp); |
1530 |
gen_op_add32(QREG_SP, tmp, gen_im32(offset)); |
1531 |
} |
1532 |
|
1533 |
DISAS_INSN(unlk) |
1534 |
{ |
1535 |
int src;
|
1536 |
int reg;
|
1537 |
int tmp;
|
1538 |
|
1539 |
src = gen_new_qreg(QMODE_I32); |
1540 |
reg = AREG(insn, 0);
|
1541 |
gen_op_mov32(src, reg); |
1542 |
tmp = gen_load(s, OS_LONG, src, 0);
|
1543 |
gen_op_mov32(reg, tmp); |
1544 |
gen_op_add32(QREG_SP, src, gen_im32(4));
|
1545 |
} |
1546 |
|
1547 |
DISAS_INSN(nop) |
1548 |
{ |
1549 |
} |
1550 |
|
1551 |
DISAS_INSN(rts) |
1552 |
{ |
1553 |
int tmp;
|
1554 |
|
1555 |
tmp = gen_load(s, OS_LONG, QREG_SP, 0);
|
1556 |
gen_op_add32(QREG_SP, QREG_SP, gen_im32(4));
|
1557 |
gen_jmp(s, tmp); |
1558 |
} |
1559 |
|
1560 |
DISAS_INSN(jump) |
1561 |
{ |
1562 |
int tmp;
|
1563 |
|
1564 |
/* Load the target address first to ensure correct exception
|
1565 |
behavior. */
|
1566 |
tmp = gen_lea(s, insn, OS_LONG); |
1567 |
if (tmp == -1) { |
1568 |
gen_addr_fault(s); |
1569 |
return;
|
1570 |
} |
1571 |
if ((insn & 0x40) == 0) { |
1572 |
/* jsr */
|
1573 |
gen_push(s, gen_im32(s->pc)); |
1574 |
} |
1575 |
gen_jmp(s, tmp); |
1576 |
} |
1577 |
|
1578 |
DISAS_INSN(addsubq) |
1579 |
{ |
1580 |
int src1;
|
1581 |
int src2;
|
1582 |
int dest;
|
1583 |
int val;
|
1584 |
int addr;
|
1585 |
|
1586 |
SRC_EA(src1, OS_LONG, 0, &addr);
|
1587 |
val = (insn >> 9) & 7; |
1588 |
if (val == 0) |
1589 |
val = 8;
|
1590 |
src2 = gen_im32(val); |
1591 |
dest = gen_new_qreg(QMODE_I32); |
1592 |
gen_op_mov32(dest, src1); |
1593 |
if ((insn & 0x38) == 0x08) { |
1594 |
/* Don't update condition codes if the destination is an
|
1595 |
address register. */
|
1596 |
if (insn & 0x0100) { |
1597 |
gen_op_sub32(dest, dest, src2); |
1598 |
} else {
|
1599 |
gen_op_add32(dest, dest, src2); |
1600 |
} |
1601 |
} else {
|
1602 |
if (insn & 0x0100) { |
1603 |
gen_op_update_xflag_lt(dest, src2); |
1604 |
gen_op_sub32(dest, dest, src2); |
1605 |
s->cc_op = CC_OP_SUB; |
1606 |
} else {
|
1607 |
gen_op_add32(dest, dest, src2); |
1608 |
gen_op_update_xflag_lt(dest, src2); |
1609 |
s->cc_op = CC_OP_ADD; |
1610 |
} |
1611 |
gen_op_update_cc_add(dest, src2); |
1612 |
} |
1613 |
DEST_EA(insn, OS_LONG, dest, &addr); |
1614 |
} |
1615 |
|
1616 |
DISAS_INSN(tpf) |
1617 |
{ |
1618 |
switch (insn & 7) { |
1619 |
case 2: /* One extension word. */ |
1620 |
s->pc += 2;
|
1621 |
break;
|
1622 |
case 3: /* Two extension words. */ |
1623 |
s->pc += 4;
|
1624 |
break;
|
1625 |
case 4: /* No extension words. */ |
1626 |
break;
|
1627 |
default:
|
1628 |
disas_undef(s, insn); |
1629 |
} |
1630 |
} |
1631 |
|
1632 |
DISAS_INSN(branch) |
1633 |
{ |
1634 |
int32_t offset; |
1635 |
uint32_t base; |
1636 |
int op;
|
1637 |
int l1;
|
1638 |
|
1639 |
base = s->pc; |
1640 |
op = (insn >> 8) & 0xf; |
1641 |
offset = (int8_t)insn; |
1642 |
if (offset == 0) { |
1643 |
offset = ldsw_code(s->pc); |
1644 |
s->pc += 2;
|
1645 |
} else if (offset == -1) { |
1646 |
offset = read_im32(s); |
1647 |
} |
1648 |
if (op == 1) { |
1649 |
/* bsr */
|
1650 |
gen_push(s, gen_im32(s->pc)); |
1651 |
} |
1652 |
gen_flush_cc_op(s); |
1653 |
if (op > 1) { |
1654 |
/* Bcc */
|
1655 |
l1 = gen_new_label(); |
1656 |
gen_jmpcc(s, ((insn >> 8) & 0xf) ^ 1, l1); |
1657 |
gen_jmp_tb(s, 1, base + offset);
|
1658 |
gen_set_label(l1); |
1659 |
gen_jmp_tb(s, 0, s->pc);
|
1660 |
} else {
|
1661 |
/* Unconditional branch. */
|
1662 |
gen_jmp_tb(s, 0, base + offset);
|
1663 |
} |
1664 |
} |
1665 |
|
1666 |
DISAS_INSN(moveq) |
1667 |
{ |
1668 |
int tmp;
|
1669 |
|
1670 |
tmp = gen_im32((int8_t)insn); |
1671 |
gen_op_mov32(DREG(insn, 9), tmp);
|
1672 |
gen_logic_cc(s, tmp); |
1673 |
} |
1674 |
|
1675 |
DISAS_INSN(mvzs) |
1676 |
{ |
1677 |
int opsize;
|
1678 |
int src;
|
1679 |
int reg;
|
1680 |
|
1681 |
if (insn & 0x40) |
1682 |
opsize = OS_WORD; |
1683 |
else
|
1684 |
opsize = OS_BYTE; |
1685 |
SRC_EA(src, opsize, (insn & 0x80) ? 0 : -1, NULL); |
1686 |
reg = DREG(insn, 9);
|
1687 |
gen_op_mov32(reg, src); |
1688 |
gen_logic_cc(s, src); |
1689 |
} |
1690 |
|
1691 |
DISAS_INSN(or) |
1692 |
{ |
1693 |
int reg;
|
1694 |
int dest;
|
1695 |
int src;
|
1696 |
int addr;
|
1697 |
|
1698 |
reg = DREG(insn, 9);
|
1699 |
dest = gen_new_qreg(QMODE_I32); |
1700 |
if (insn & 0x100) { |
1701 |
SRC_EA(src, OS_LONG, 0, &addr);
|
1702 |
gen_op_or32(dest, src, reg); |
1703 |
DEST_EA(insn, OS_LONG, dest, &addr); |
1704 |
} else {
|
1705 |
SRC_EA(src, OS_LONG, 0, NULL); |
1706 |
gen_op_or32(dest, src, reg); |
1707 |
gen_op_mov32(reg, dest); |
1708 |
} |
1709 |
gen_logic_cc(s, dest); |
1710 |
} |
1711 |
|
1712 |
DISAS_INSN(suba) |
1713 |
{ |
1714 |
int src;
|
1715 |
int reg;
|
1716 |
|
1717 |
SRC_EA(src, OS_LONG, 0, NULL); |
1718 |
reg = AREG(insn, 9);
|
1719 |
gen_op_sub32(reg, reg, src); |
1720 |
} |
1721 |
|
1722 |
DISAS_INSN(subx) |
1723 |
{ |
1724 |
int reg;
|
1725 |
int src;
|
1726 |
int dest;
|
1727 |
int tmp;
|
1728 |
|
1729 |
gen_flush_flags(s); |
1730 |
reg = DREG(insn, 9);
|
1731 |
src = DREG(insn, 0);
|
1732 |
dest = gen_new_qreg(QMODE_I32); |
1733 |
gen_op_mov32 (dest, reg); |
1734 |
gen_op_subx_cc(dest, src); |
1735 |
/* !Z is sticky. */
|
1736 |
tmp = gen_new_qreg(QMODE_I32); |
1737 |
gen_op_mov32 (tmp, QREG_CC_DEST); |
1738 |
gen_op_update_cc_add(dest, src); |
1739 |
gen_op_mov32(reg, dest); |
1740 |
s->cc_op = CC_OP_DYNAMIC; |
1741 |
gen_flush_flags(s); |
1742 |
gen_op_or32(tmp, tmp, gen_im32(~CCF_Z)); |
1743 |
gen_op_and32(QREG_CC_DEST, QREG_CC_DEST, tmp); |
1744 |
s->cc_op = CC_OP_FLAGS; |
1745 |
} |
1746 |
|
1747 |
DISAS_INSN(mov3q) |
1748 |
{ |
1749 |
int src;
|
1750 |
int val;
|
1751 |
|
1752 |
val = (insn >> 9) & 7; |
1753 |
if (val == 0) |
1754 |
val = -1;
|
1755 |
src = gen_im32(val); |
1756 |
gen_logic_cc(s, src); |
1757 |
DEST_EA(insn, OS_LONG, src, NULL);
|
1758 |
} |
1759 |
|
1760 |
DISAS_INSN(cmp) |
1761 |
{ |
1762 |
int op;
|
1763 |
int src;
|
1764 |
int reg;
|
1765 |
int dest;
|
1766 |
int opsize;
|
1767 |
|
1768 |
op = (insn >> 6) & 3; |
1769 |
switch (op) {
|
1770 |
case 0: /* cmp.b */ |
1771 |
opsize = OS_BYTE; |
1772 |
s->cc_op = CC_OP_CMPB; |
1773 |
break;
|
1774 |
case 1: /* cmp.w */ |
1775 |
opsize = OS_WORD; |
1776 |
s->cc_op = CC_OP_CMPW; |
1777 |
break;
|
1778 |
case 2: /* cmp.l */ |
1779 |
opsize = OS_LONG; |
1780 |
s->cc_op = CC_OP_SUB; |
1781 |
break;
|
1782 |
default:
|
1783 |
abort(); |
1784 |
} |
1785 |
SRC_EA(src, opsize, -1, NULL); |
1786 |
reg = DREG(insn, 9);
|
1787 |
dest = gen_new_qreg(QMODE_I32); |
1788 |
gen_op_sub32(dest, reg, src); |
1789 |
gen_op_update_cc_add(dest, src); |
1790 |
} |
1791 |
|
1792 |
DISAS_INSN(cmpa) |
1793 |
{ |
1794 |
int opsize;
|
1795 |
int src;
|
1796 |
int reg;
|
1797 |
int dest;
|
1798 |
|
1799 |
if (insn & 0x100) { |
1800 |
opsize = OS_LONG; |
1801 |
} else {
|
1802 |
opsize = OS_WORD; |
1803 |
} |
1804 |
SRC_EA(src, opsize, -1, NULL); |
1805 |
reg = AREG(insn, 9);
|
1806 |
dest = gen_new_qreg(QMODE_I32); |
1807 |
gen_op_sub32(dest, reg, src); |
1808 |
gen_op_update_cc_add(dest, src); |
1809 |
s->cc_op = CC_OP_SUB; |
1810 |
} |
1811 |
|
1812 |
DISAS_INSN(eor) |
1813 |
{ |
1814 |
int src;
|
1815 |
int reg;
|
1816 |
int dest;
|
1817 |
int addr;
|
1818 |
|
1819 |
SRC_EA(src, OS_LONG, 0, &addr);
|
1820 |
reg = DREG(insn, 9);
|
1821 |
dest = gen_new_qreg(QMODE_I32); |
1822 |
gen_op_xor32(dest, src, reg); |
1823 |
gen_logic_cc(s, dest); |
1824 |
DEST_EA(insn, OS_LONG, dest, &addr); |
1825 |
} |
1826 |
|
1827 |
DISAS_INSN(and) |
1828 |
{ |
1829 |
int src;
|
1830 |
int reg;
|
1831 |
int dest;
|
1832 |
int addr;
|
1833 |
|
1834 |
reg = DREG(insn, 9);
|
1835 |
dest = gen_new_qreg(QMODE_I32); |
1836 |
if (insn & 0x100) { |
1837 |
SRC_EA(src, OS_LONG, 0, &addr);
|
1838 |
gen_op_and32(dest, src, reg); |
1839 |
DEST_EA(insn, OS_LONG, dest, &addr); |
1840 |
} else {
|
1841 |
SRC_EA(src, OS_LONG, 0, NULL); |
1842 |
gen_op_and32(dest, src, reg); |
1843 |
gen_op_mov32(reg, dest); |
1844 |
} |
1845 |
gen_logic_cc(s, dest); |
1846 |
} |
1847 |
|
1848 |
DISAS_INSN(adda) |
1849 |
{ |
1850 |
int src;
|
1851 |
int reg;
|
1852 |
|
1853 |
SRC_EA(src, OS_LONG, 0, NULL); |
1854 |
reg = AREG(insn, 9);
|
1855 |
gen_op_add32(reg, reg, src); |
1856 |
} |
1857 |
|
1858 |
DISAS_INSN(addx) |
1859 |
{ |
1860 |
int reg;
|
1861 |
int src;
|
1862 |
int dest;
|
1863 |
int tmp;
|
1864 |
|
1865 |
gen_flush_flags(s); |
1866 |
reg = DREG(insn, 9);
|
1867 |
src = DREG(insn, 0);
|
1868 |
dest = gen_new_qreg(QMODE_I32); |
1869 |
gen_op_mov32 (dest, reg); |
1870 |
gen_op_addx_cc(dest, src); |
1871 |
/* !Z is sticky. */
|
1872 |
tmp = gen_new_qreg(QMODE_I32); |
1873 |
gen_op_mov32 (tmp, QREG_CC_DEST); |
1874 |
gen_op_update_cc_add(dest, src); |
1875 |
gen_op_mov32(reg, dest); |
1876 |
s->cc_op = CC_OP_DYNAMIC; |
1877 |
gen_flush_flags(s); |
1878 |
gen_op_or32(tmp, tmp, gen_im32(~CCF_Z)); |
1879 |
gen_op_and32(QREG_CC_DEST, QREG_CC_DEST, tmp); |
1880 |
s->cc_op = CC_OP_FLAGS; |
1881 |
} |
1882 |
|
1883 |
DISAS_INSN(shift_im) |
1884 |
{ |
1885 |
int reg;
|
1886 |
int tmp;
|
1887 |
|
1888 |
reg = DREG(insn, 0);
|
1889 |
tmp = (insn >> 9) & 7; |
1890 |
if (tmp == 0) |
1891 |
tmp = 8;
|
1892 |
if (insn & 0x100) { |
1893 |
gen_op_shl_im_cc(reg, tmp); |
1894 |
s->cc_op = CC_OP_SHL; |
1895 |
} else {
|
1896 |
if (insn & 8) { |
1897 |
gen_op_shr_im_cc(reg, tmp); |
1898 |
s->cc_op = CC_OP_SHR; |
1899 |
} else {
|
1900 |
gen_op_sar_im_cc(reg, tmp); |
1901 |
s->cc_op = CC_OP_SAR; |
1902 |
} |
1903 |
} |
1904 |
} |
1905 |
|
1906 |
DISAS_INSN(shift_reg) |
1907 |
{ |
1908 |
int reg;
|
1909 |
int src;
|
1910 |
int tmp;
|
1911 |
|
1912 |
reg = DREG(insn, 0);
|
1913 |
src = DREG(insn, 9);
|
1914 |
tmp = gen_new_qreg(QMODE_I32); |
1915 |
gen_op_and32(tmp, src, gen_im32(63));
|
1916 |
if (insn & 0x100) { |
1917 |
gen_op_shl_cc(reg, tmp); |
1918 |
s->cc_op = CC_OP_SHL; |
1919 |
} else {
|
1920 |
if (insn & 8) { |
1921 |
gen_op_shr_cc(reg, tmp); |
1922 |
s->cc_op = CC_OP_SHR; |
1923 |
} else {
|
1924 |
gen_op_sar_cc(reg, tmp); |
1925 |
s->cc_op = CC_OP_SAR; |
1926 |
} |
1927 |
} |
1928 |
} |
1929 |
|
1930 |
DISAS_INSN(ff1) |
1931 |
{ |
1932 |
int reg;
|
1933 |
reg = DREG(insn, 0);
|
1934 |
gen_logic_cc(s, reg); |
1935 |
gen_op_ff1(reg, reg); |
1936 |
} |
1937 |
|
1938 |
static int gen_get_sr(DisasContext *s) |
1939 |
{ |
1940 |
int ccr;
|
1941 |
int sr;
|
1942 |
|
1943 |
ccr = gen_get_ccr(s); |
1944 |
sr = gen_new_qreg(QMODE_I32); |
1945 |
gen_op_and32(sr, QREG_SR, gen_im32(0xffe0));
|
1946 |
gen_op_or32(sr, sr, ccr); |
1947 |
return sr;
|
1948 |
} |
1949 |
|
1950 |
DISAS_INSN(strldsr) |
1951 |
{ |
1952 |
uint16_t ext; |
1953 |
uint32_t addr; |
1954 |
|
1955 |
addr = s->pc - 2;
|
1956 |
ext = lduw_code(s->pc); |
1957 |
s->pc += 2;
|
1958 |
if (ext != 0x46FC) { |
1959 |
gen_exception(s, addr, EXCP_UNSUPPORTED); |
1960 |
return;
|
1961 |
} |
1962 |
ext = lduw_code(s->pc); |
1963 |
s->pc += 2;
|
1964 |
if (IS_USER(s) || (ext & SR_S) == 0) { |
1965 |
gen_exception(s, addr, EXCP_PRIVILEGE); |
1966 |
return;
|
1967 |
} |
1968 |
gen_push(s, gen_get_sr(s)); |
1969 |
gen_set_sr_im(s, ext, 0);
|
1970 |
} |
1971 |
|
1972 |
DISAS_INSN(move_from_sr) |
1973 |
{ |
1974 |
int reg;
|
1975 |
int sr;
|
1976 |
|
1977 |
if (IS_USER(s)) {
|
1978 |
gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
|
1979 |
return;
|
1980 |
} |
1981 |
sr = gen_get_sr(s); |
1982 |
reg = DREG(insn, 0);
|
1983 |
gen_partset_reg(OS_WORD, reg, sr); |
1984 |
} |
1985 |
|
1986 |
DISAS_INSN(move_to_sr) |
1987 |
{ |
1988 |
if (IS_USER(s)) {
|
1989 |
gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
|
1990 |
return;
|
1991 |
} |
1992 |
gen_set_sr(s, insn, 0);
|
1993 |
gen_lookup_tb(s); |
1994 |
} |
1995 |
|
1996 |
DISAS_INSN(move_from_usp) |
1997 |
{ |
1998 |
if (IS_USER(s)) {
|
1999 |
gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
|
2000 |
return;
|
2001 |
} |
2002 |
/* TODO: Implement USP. */
|
2003 |
gen_exception(s, s->pc - 2, EXCP_ILLEGAL);
|
2004 |
} |
2005 |
|
2006 |
DISAS_INSN(move_to_usp) |
2007 |
{ |
2008 |
if (IS_USER(s)) {
|
2009 |
gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
|
2010 |
return;
|
2011 |
} |
2012 |
/* TODO: Implement USP. */
|
2013 |
gen_exception(s, s->pc - 2, EXCP_ILLEGAL);
|
2014 |
} |
2015 |
|
2016 |
DISAS_INSN(halt) |
2017 |
{ |
2018 |
gen_jmp(s, gen_im32(s->pc)); |
2019 |
gen_op_halt(); |
2020 |
} |
2021 |
|
2022 |
DISAS_INSN(stop) |
2023 |
{ |
2024 |
uint16_t ext; |
2025 |
|
2026 |
if (IS_USER(s)) {
|
2027 |
gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
|
2028 |
return;
|
2029 |
} |
2030 |
|
2031 |
ext = lduw_code(s->pc); |
2032 |
s->pc += 2;
|
2033 |
|
2034 |
gen_set_sr_im(s, ext, 0);
|
2035 |
gen_jmp(s, gen_im32(s->pc)); |
2036 |
gen_op_stop(); |
2037 |
} |
2038 |
|
2039 |
DISAS_INSN(rte) |
2040 |
{ |
2041 |
if (IS_USER(s)) {
|
2042 |
gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
|
2043 |
return;
|
2044 |
} |
2045 |
gen_exception(s, s->pc - 2, EXCP_RTE);
|
2046 |
} |
2047 |
|
2048 |
DISAS_INSN(movec) |
2049 |
{ |
2050 |
uint16_t ext; |
2051 |
int reg;
|
2052 |
|
2053 |
if (IS_USER(s)) {
|
2054 |
gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
|
2055 |
return;
|
2056 |
} |
2057 |
|
2058 |
ext = lduw_code(s->pc); |
2059 |
s->pc += 2;
|
2060 |
|
2061 |
if (ext & 0x8000) { |
2062 |
reg = AREG(ext, 12);
|
2063 |
} else {
|
2064 |
reg = DREG(ext, 12);
|
2065 |
} |
2066 |
gen_op_movec(gen_im32(ext & 0xfff), reg);
|
2067 |
gen_lookup_tb(s); |
2068 |
} |
2069 |
|
2070 |
DISAS_INSN(intouch) |
2071 |
{ |
2072 |
if (IS_USER(s)) {
|
2073 |
gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
|
2074 |
return;
|
2075 |
} |
2076 |
/* ICache fetch. Implement as no-op. */
|
2077 |
} |
2078 |
|
2079 |
DISAS_INSN(cpushl) |
2080 |
{ |
2081 |
if (IS_USER(s)) {
|
2082 |
gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
|
2083 |
return;
|
2084 |
} |
2085 |
/* Cache push/invalidate. Implement as no-op. */
|
2086 |
} |
2087 |
|
2088 |
DISAS_INSN(wddata) |
2089 |
{ |
2090 |
gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
|
2091 |
} |
2092 |
|
2093 |
DISAS_INSN(wdebug) |
2094 |
{ |
2095 |
if (IS_USER(s)) {
|
2096 |
gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
|
2097 |
return;
|
2098 |
} |
2099 |
/* TODO: Implement wdebug. */
|
2100 |
qemu_assert(0, "WDEBUG not implemented"); |
2101 |
} |
2102 |
|
2103 |
DISAS_INSN(trap) |
2104 |
{ |
2105 |
gen_exception(s, s->pc - 2, EXCP_TRAP0 + (insn & 0xf)); |
2106 |
} |
2107 |
|
2108 |
/* ??? FP exceptions are not implemented. Most exceptions are deferred until
|
2109 |
immediately before the next FP instruction is executed. */
|
2110 |
DISAS_INSN(fpu) |
2111 |
{ |
2112 |
uint16_t ext; |
2113 |
int opmode;
|
2114 |
int src;
|
2115 |
int dest;
|
2116 |
int res;
|
2117 |
int round;
|
2118 |
int opsize;
|
2119 |
|
2120 |
ext = lduw_code(s->pc); |
2121 |
s->pc += 2;
|
2122 |
opmode = ext & 0x7f;
|
2123 |
switch ((ext >> 13) & 7) { |
2124 |
case 0: case 2: |
2125 |
break;
|
2126 |
case 1: |
2127 |
goto undef;
|
2128 |
case 3: /* fmove out */ |
2129 |
src = FREG(ext, 7);
|
2130 |
/* fmove */
|
2131 |
/* ??? TODO: Proper behavior on overflow. */
|
2132 |
switch ((ext >> 10) & 7) { |
2133 |
case 0: |
2134 |
opsize = OS_LONG; |
2135 |
res = gen_new_qreg(QMODE_I32); |
2136 |
gen_op_f64_to_i32(res, src); |
2137 |
break;
|
2138 |
case 1: |
2139 |
opsize = OS_SINGLE; |
2140 |
res = gen_new_qreg(QMODE_F32); |
2141 |
gen_op_f64_to_f32(res, src); |
2142 |
break;
|
2143 |
case 4: |
2144 |
opsize = OS_WORD; |
2145 |
res = gen_new_qreg(QMODE_I32); |
2146 |
gen_op_f64_to_i32(res, src); |
2147 |
break;
|
2148 |
case 5: |
2149 |
opsize = OS_DOUBLE; |
2150 |
res = src; |
2151 |
break;
|
2152 |
case 6: |
2153 |
opsize = OS_BYTE; |
2154 |
res = gen_new_qreg(QMODE_I32); |
2155 |
gen_op_f64_to_i32(res, src); |
2156 |
break;
|
2157 |
default:
|
2158 |
goto undef;
|
2159 |
} |
2160 |
DEST_EA(insn, opsize, res, NULL);
|
2161 |
return;
|
2162 |
case 4: /* fmove to control register. */ |
2163 |
switch ((ext >> 10) & 7) { |
2164 |
case 4: /* FPCR */ |
2165 |
/* Not implemented. Ignore writes. */
|
2166 |
break;
|
2167 |
case 1: /* FPIAR */ |
2168 |
case 2: /* FPSR */ |
2169 |
default:
|
2170 |
cpu_abort(NULL, "Unimplemented: fmove to control %d", |
2171 |
(ext >> 10) & 7); |
2172 |
} |
2173 |
break;
|
2174 |
case 5: /* fmove from control register. */ |
2175 |
switch ((ext >> 10) & 7) { |
2176 |
case 4: /* FPCR */ |
2177 |
/* Not implemented. Always return zero. */
|
2178 |
res = gen_im32(0);
|
2179 |
break;
|
2180 |
case 1: /* FPIAR */ |
2181 |
case 2: /* FPSR */ |
2182 |
default:
|
2183 |
cpu_abort(NULL, "Unimplemented: fmove from control %d", |
2184 |
(ext >> 10) & 7); |
2185 |
goto undef;
|
2186 |
} |
2187 |
DEST_EA(insn, OS_LONG, res, NULL);
|
2188 |
break;
|
2189 |
case 6: /* fmovem */ |
2190 |
case 7: |
2191 |
{ |
2192 |
int addr;
|
2193 |
uint16_t mask; |
2194 |
if ((ext & 0x1f00) != 0x1000 || (ext & 0xff) == 0) |
2195 |
goto undef;
|
2196 |
src = gen_lea(s, insn, OS_LONG); |
2197 |
if (src == -1) { |
2198 |
gen_addr_fault(s); |
2199 |
return;
|
2200 |
} |
2201 |
addr = gen_new_qreg(QMODE_I32); |
2202 |
gen_op_mov32(addr, src); |
2203 |
mask = 0x80;
|
2204 |
dest = QREG_F0; |
2205 |
while (mask) {
|
2206 |
if (ext & mask) {
|
2207 |
if (ext & (1 << 13)) { |
2208 |
/* store */
|
2209 |
gen_st(s, f64, addr, dest); |
2210 |
} else {
|
2211 |
/* load */
|
2212 |
gen_ld(s, f64, dest, addr); |
2213 |
} |
2214 |
if (ext & (mask - 1)) |
2215 |
gen_op_add32(addr, addr, gen_im32(8));
|
2216 |
} |
2217 |
mask >>= 1;
|
2218 |
dest++; |
2219 |
} |
2220 |
} |
2221 |
return;
|
2222 |
} |
2223 |
if (ext & (1 << 14)) { |
2224 |
int tmp;
|
2225 |
|
2226 |
/* Source effective address. */
|
2227 |
switch ((ext >> 10) & 7) { |
2228 |
case 0: opsize = OS_LONG; break; |
2229 |
case 1: opsize = OS_SINGLE; break; |
2230 |
case 4: opsize = OS_WORD; break; |
2231 |
case 5: opsize = OS_DOUBLE; break; |
2232 |
case 6: opsize = OS_BYTE; break; |
2233 |
default:
|
2234 |
goto undef;
|
2235 |
} |
2236 |
SRC_EA(tmp, opsize, -1, NULL); |
2237 |
if (opsize == OS_DOUBLE) {
|
2238 |
src = tmp; |
2239 |
} else {
|
2240 |
src = gen_new_qreg(QMODE_F64); |
2241 |
switch (opsize) {
|
2242 |
case OS_LONG:
|
2243 |
case OS_WORD:
|
2244 |
case OS_BYTE:
|
2245 |
gen_op_i32_to_f64(src, tmp); |
2246 |
break;
|
2247 |
case OS_SINGLE:
|
2248 |
gen_op_f32_to_f64(src, tmp); |
2249 |
break;
|
2250 |
} |
2251 |
} |
2252 |
} else {
|
2253 |
/* Source register. */
|
2254 |
src = FREG(ext, 10);
|
2255 |
} |
2256 |
dest = FREG(ext, 7);
|
2257 |
res = gen_new_qreg(QMODE_F64); |
2258 |
if (opmode != 0x3a) |
2259 |
gen_op_movf64(res, dest); |
2260 |
round = 1;
|
2261 |
switch (opmode) {
|
2262 |
case 0: case 0x40: case 0x44: /* fmove */ |
2263 |
gen_op_movf64(res, src); |
2264 |
break;
|
2265 |
case 1: /* fint */ |
2266 |
gen_op_iround_f64(res, src); |
2267 |
round = 0;
|
2268 |
break;
|
2269 |
case 3: /* fintrz */ |
2270 |
gen_op_itrunc_f64(res, src); |
2271 |
round = 0;
|
2272 |
break;
|
2273 |
case 4: case 0x41: case 0x45: /* fsqrt */ |
2274 |
gen_op_sqrtf64(res, src); |
2275 |
break;
|
2276 |
case 0x18: case 0x58: case 0x5c: /* fabs */ |
2277 |
gen_op_absf64(res, src); |
2278 |
break;
|
2279 |
case 0x1a: case 0x5a: case 0x5e: /* fneg */ |
2280 |
gen_op_chsf64(res, src); |
2281 |
break;
|
2282 |
case 0x20: case 0x60: case 0x64: /* fdiv */ |
2283 |
gen_op_divf64(res, res, src); |
2284 |
break;
|
2285 |
case 0x22: case 0x62: case 0x66: /* fadd */ |
2286 |
gen_op_addf64(res, res, src); |
2287 |
break;
|
2288 |
case 0x23: case 0x63: case 0x67: /* fmul */ |
2289 |
gen_op_mulf64(res, res, src); |
2290 |
break;
|
2291 |
case 0x28: case 0x68: case 0x6c: /* fsub */ |
2292 |
gen_op_subf64(res, res, src); |
2293 |
break;
|
2294 |
case 0x38: /* fcmp */ |
2295 |
gen_op_sub_cmpf64(res, res, src); |
2296 |
dest = 0;
|
2297 |
round = 0;
|
2298 |
break;
|
2299 |
case 0x3a: /* ftst */ |
2300 |
gen_op_movf64(res, src); |
2301 |
dest = 0;
|
2302 |
round = 0;
|
2303 |
break;
|
2304 |
default:
|
2305 |
goto undef;
|
2306 |
} |
2307 |
if (round) {
|
2308 |
if (opmode & 0x40) { |
2309 |
if ((opmode & 0x4) != 0) |
2310 |
round = 0;
|
2311 |
} else if ((s->fpcr & M68K_FPCR_PREC) == 0) { |
2312 |
round = 0;
|
2313 |
} |
2314 |
} |
2315 |
if (round) {
|
2316 |
int tmp;
|
2317 |
|
2318 |
tmp = gen_new_qreg(QMODE_F32); |
2319 |
gen_op_f64_to_f32(tmp, res); |
2320 |
gen_op_f32_to_f64(res, tmp); |
2321 |
} |
2322 |
gen_op_fp_result(res); |
2323 |
if (dest) {
|
2324 |
gen_op_movf64(dest, res); |
2325 |
} |
2326 |
return;
|
2327 |
undef:
|
2328 |
s->pc -= 2;
|
2329 |
disas_undef_fpu(s, insn); |
2330 |
} |
2331 |
|
2332 |
DISAS_INSN(fbcc) |
2333 |
{ |
2334 |
uint32_t offset; |
2335 |
uint32_t addr; |
2336 |
int flag;
|
2337 |
int zero;
|
2338 |
int l1;
|
2339 |
|
2340 |
addr = s->pc; |
2341 |
offset = ldsw_code(s->pc); |
2342 |
s->pc += 2;
|
2343 |
if (insn & (1 << 6)) { |
2344 |
offset = (offset << 16) | lduw_code(s->pc);
|
2345 |
s->pc += 2;
|
2346 |
} |
2347 |
|
2348 |
l1 = gen_new_label(); |
2349 |
/* TODO: Raise BSUN exception. */
|
2350 |
flag = gen_new_qreg(QMODE_I32); |
2351 |
zero = gen_new_qreg(QMODE_F64); |
2352 |
gen_op_zerof64(zero); |
2353 |
gen_op_compare_quietf64(flag, QREG_FP_RESULT, zero); |
2354 |
/* Jump to l1 if condition is true. */
|
2355 |
switch (insn & 0xf) { |
2356 |
case 0: /* f */ |
2357 |
break;
|
2358 |
case 1: /* eq (=0) */ |
2359 |
gen_op_jmp_z32(flag, l1); |
2360 |
break;
|
2361 |
case 2: /* ogt (=1) */ |
2362 |
gen_op_sub32(flag, flag, gen_im32(1));
|
2363 |
gen_op_jmp_z32(flag, l1); |
2364 |
break;
|
2365 |
case 3: /* oge (=0 or =1) */ |
2366 |
gen_op_jmp_z32(flag, l1); |
2367 |
gen_op_sub32(flag, flag, gen_im32(1));
|
2368 |
gen_op_jmp_z32(flag, l1); |
2369 |
break;
|
2370 |
case 4: /* olt (=-1) */ |
2371 |
gen_op_jmp_s32(flag, l1); |
2372 |
break;
|
2373 |
case 5: /* ole (=-1 or =0) */ |
2374 |
gen_op_jmp_s32(flag, l1); |
2375 |
gen_op_jmp_z32(flag, l1); |
2376 |
break;
|
2377 |
case 6: /* ogl (=-1 or =1) */ |
2378 |
gen_op_jmp_s32(flag, l1); |
2379 |
gen_op_sub32(flag, flag, gen_im32(1));
|
2380 |
gen_op_jmp_z32(flag, l1); |
2381 |
break;
|
2382 |
case 7: /* or (=2) */ |
2383 |
gen_op_sub32(flag, flag, gen_im32(2));
|
2384 |
gen_op_jmp_z32(flag, l1); |
2385 |
break;
|
2386 |
case 8: /* un (<2) */ |
2387 |
gen_op_sub32(flag, flag, gen_im32(2));
|
2388 |
gen_op_jmp_s32(flag, l1); |
2389 |
break;
|
2390 |
case 9: /* ueq (=0 or =2) */ |
2391 |
gen_op_jmp_z32(flag, l1); |
2392 |
gen_op_sub32(flag, flag, gen_im32(2));
|
2393 |
gen_op_jmp_z32(flag, l1); |
2394 |
break;
|
2395 |
case 10: /* ugt (>0) */ |
2396 |
/* ??? Add jmp_gtu. */
|
2397 |
gen_op_sub32(flag, flag, gen_im32(1));
|
2398 |
gen_op_jmp_ns32(flag, l1); |
2399 |
break;
|
2400 |
case 11: /* uge (>=0) */ |
2401 |
gen_op_jmp_ns32(flag, l1); |
2402 |
break;
|
2403 |
case 12: /* ult (=-1 or =2) */ |
2404 |
gen_op_jmp_s32(flag, l1); |
2405 |
gen_op_sub32(flag, flag, gen_im32(2));
|
2406 |
gen_op_jmp_z32(flag, l1); |
2407 |
break;
|
2408 |
case 13: /* ule (!=1) */ |
2409 |
gen_op_sub32(flag, flag, gen_im32(1));
|
2410 |
gen_op_jmp_nz32(flag, l1); |
2411 |
break;
|
2412 |
case 14: /* ne (!=0) */ |
2413 |
gen_op_jmp_nz32(flag, l1); |
2414 |
break;
|
2415 |
case 15: /* t */ |
2416 |
gen_op_mov32(flag, gen_im32(1));
|
2417 |
break;
|
2418 |
} |
2419 |
gen_jmp_tb(s, 0, s->pc);
|
2420 |
gen_set_label(l1); |
2421 |
gen_jmp_tb(s, 1, addr + offset);
|
2422 |
} |
2423 |
|
2424 |
DISAS_INSN(frestore) |
2425 |
{ |
2426 |
/* TODO: Implement frestore. */
|
2427 |
qemu_assert(0, "FRESTORE not implemented"); |
2428 |
} |
2429 |
|
2430 |
DISAS_INSN(fsave) |
2431 |
{ |
2432 |
/* TODO: Implement fsave. */
|
2433 |
qemu_assert(0, "FSAVE not implemented"); |
2434 |
} |
2435 |
|
2436 |
static inline int gen_mac_extract_word(DisasContext *s, int val, int upper) |
2437 |
{ |
2438 |
int tmp = gen_new_qreg(QMODE_I32);
|
2439 |
if (s->env->macsr & MACSR_FI) {
|
2440 |
if (upper)
|
2441 |
gen_op_and32(tmp, val, gen_im32(0xffff0000));
|
2442 |
else
|
2443 |
gen_op_shl32(tmp, val, gen_im32(16));
|
2444 |
} else if (s->env->macsr & MACSR_SU) { |
2445 |
if (upper)
|
2446 |
gen_op_sar32(tmp, val, gen_im32(16));
|
2447 |
else
|
2448 |
gen_op_ext16s32(tmp, val); |
2449 |
} else {
|
2450 |
if (upper)
|
2451 |
gen_op_shr32(tmp, val, gen_im32(16));
|
2452 |
else
|
2453 |
gen_op_ext16u32(tmp, val); |
2454 |
} |
2455 |
return tmp;
|
2456 |
} |
2457 |
|
2458 |
DISAS_INSN(mac) |
2459 |
{ |
2460 |
int rx;
|
2461 |
int ry;
|
2462 |
uint16_t ext; |
2463 |
int acc;
|
2464 |
int l1;
|
2465 |
int tmp;
|
2466 |
int addr;
|
2467 |
int loadval;
|
2468 |
int dual;
|
2469 |
int saved_flags = -1; |
2470 |
|
2471 |
ext = lduw_code(s->pc); |
2472 |
s->pc += 2;
|
2473 |
|
2474 |
acc = ((insn >> 7) & 1) | ((ext >> 3) & 2); |
2475 |
dual = ((insn & 0x30) != 0 && (ext & 3) != 0); |
2476 |
if (dual && !m68k_feature(s->env, M68K_FEATURE_CF_EMAC_B)) {
|
2477 |
disas_undef(s, insn); |
2478 |
return;
|
2479 |
} |
2480 |
if (insn & 0x30) { |
2481 |
/* MAC with load. */
|
2482 |
tmp = gen_lea(s, insn, OS_LONG); |
2483 |
addr = gen_new_qreg(QMODE_I32); |
2484 |
gen_op_and32(addr, tmp, QREG_MAC_MASK); |
2485 |
/* Load the value now to ensure correct exception behavior.
|
2486 |
Perform writeback after reading the MAC inputs. */
|
2487 |
loadval = gen_load(s, OS_LONG, addr, 0);
|
2488 |
|
2489 |
acc ^= 1;
|
2490 |
rx = (ext & 0x8000) ? AREG(ext, 12) : DREG(insn, 12); |
2491 |
ry = (ext & 8) ? AREG(ext, 0) : DREG(ext, 0); |
2492 |
} else {
|
2493 |
loadval = addr = -1;
|
2494 |
rx = (insn & 0x40) ? AREG(insn, 9) : DREG(insn, 9); |
2495 |
ry = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0); |
2496 |
} |
2497 |
|
2498 |
gen_op_mac_clear_flags(); |
2499 |
l1 = -1;
|
2500 |
if ((s->env->macsr & MACSR_OMC) != 0 && !dual) { |
2501 |
/* Skip the multiply if we know we will ignore it. */
|
2502 |
l1 = gen_new_label(); |
2503 |
tmp = gen_new_qreg(QMODE_I32); |
2504 |
gen_op_and32(tmp, QREG_MACSR, gen_im32(1 << (acc + 8))); |
2505 |
gen_op_jmp_nz32(tmp, l1); |
2506 |
} |
2507 |
|
2508 |
if ((ext & 0x0800) == 0) { |
2509 |
/* Word. */
|
2510 |
rx = gen_mac_extract_word(s, rx, (ext & 0x80) != 0); |
2511 |
ry = gen_mac_extract_word(s, ry, (ext & 0x40) != 0); |
2512 |
} |
2513 |
if (s->env->macsr & MACSR_FI) {
|
2514 |
gen_op_macmulf(rx, ry); |
2515 |
} else {
|
2516 |
if (s->env->macsr & MACSR_SU)
|
2517 |
gen_op_macmuls(rx, ry); |
2518 |
else
|
2519 |
gen_op_macmulu(rx, ry); |
2520 |
switch ((ext >> 9) & 3) { |
2521 |
case 1: |
2522 |
gen_op_macshl(); |
2523 |
break;
|
2524 |
case 3: |
2525 |
gen_op_macshr(); |
2526 |
break;
|
2527 |
} |
2528 |
} |
2529 |
|
2530 |
if (dual) {
|
2531 |
/* Save the overflow flag from the multiply. */
|
2532 |
saved_flags = gen_new_qreg(QMODE_I32); |
2533 |
gen_op_mov32(saved_flags, QREG_MACSR); |
2534 |
} |
2535 |
|
2536 |
if ((s->env->macsr & MACSR_OMC) != 0 && dual) { |
2537 |
/* Skip the accumulate if the value is already saturated. */
|
2538 |
l1 = gen_new_label(); |
2539 |
tmp = gen_new_qreg(QMODE_I32); |
2540 |
gen_op_and32(tmp, QREG_MACSR, gen_im32(MACSR_PAV0 << acc)); |
2541 |
gen_op_jmp_nz32(tmp, l1); |
2542 |
} |
2543 |
|
2544 |
if (insn & 0x100) |
2545 |
gen_op_macsub(acc); |
2546 |
else
|
2547 |
gen_op_macadd(acc); |
2548 |
|
2549 |
if (s->env->macsr & MACSR_FI)
|
2550 |
gen_op_macsatf(acc); |
2551 |
else if (s->env->macsr & MACSR_SU) |
2552 |
gen_op_macsats(acc); |
2553 |
else
|
2554 |
gen_op_macsatu(acc); |
2555 |
|
2556 |
if (l1 != -1) |
2557 |
gen_set_label(l1); |
2558 |
|
2559 |
if (dual) {
|
2560 |
/* Dual accumulate variant. */
|
2561 |
acc = (ext >> 2) & 3; |
2562 |
/* Restore the overflow flag from the multiplier. */
|
2563 |
gen_op_mov32(QREG_MACSR, saved_flags); |
2564 |
if ((s->env->macsr & MACSR_OMC) != 0) { |
2565 |
/* Skip the accumulate if the value is already saturated. */
|
2566 |
l1 = gen_new_label(); |
2567 |
tmp = gen_new_qreg(QMODE_I32); |
2568 |
gen_op_and32(tmp, QREG_MACSR, gen_im32(MACSR_PAV0 << acc)); |
2569 |
gen_op_jmp_nz32(tmp, l1); |
2570 |
} |
2571 |
if (ext & 2) |
2572 |
gen_op_macsub(acc); |
2573 |
else
|
2574 |
gen_op_macadd(acc); |
2575 |
if (s->env->macsr & MACSR_FI)
|
2576 |
gen_op_macsatf(acc); |
2577 |
else if (s->env->macsr & MACSR_SU) |
2578 |
gen_op_macsats(acc); |
2579 |
else
|
2580 |
gen_op_macsatu(acc); |
2581 |
if (l1 != -1) |
2582 |
gen_set_label(l1); |
2583 |
} |
2584 |
gen_op_mac_set_flags(acc); |
2585 |
|
2586 |
if (insn & 0x30) { |
2587 |
int rw;
|
2588 |
rw = (insn & 0x40) ? AREG(insn, 9) : DREG(insn, 9); |
2589 |
gen_op_mov32(rw, loadval); |
2590 |
/* FIXME: Should address writeback happen with the masked or
|
2591 |
unmasked value? */
|
2592 |
switch ((insn >> 3) & 7) { |
2593 |
case 3: /* Post-increment. */ |
2594 |
gen_op_add32(AREG(insn, 0), addr, gen_im32(4)); |
2595 |
break;
|
2596 |
case 4: /* Pre-decrement. */ |
2597 |
gen_op_mov32(AREG(insn, 0), addr);
|
2598 |
} |
2599 |
} |
2600 |
} |
2601 |
|
2602 |
DISAS_INSN(from_mac) |
2603 |
{ |
2604 |
int rx;
|
2605 |
int acc;
|
2606 |
|
2607 |
rx = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0); |
2608 |
acc = (insn >> 9) & 3; |
2609 |
if (s->env->macsr & MACSR_FI) {
|
2610 |
gen_op_get_macf(rx, acc); |
2611 |
} else if ((s->env->macsr & MACSR_OMC) == 0) { |
2612 |
gen_op_get_maci(rx, acc); |
2613 |
} else if (s->env->macsr & MACSR_SU) { |
2614 |
gen_op_get_macs(rx, acc); |
2615 |
} else {
|
2616 |
gen_op_get_macu(rx, acc); |
2617 |
} |
2618 |
if (insn & 0x40) |
2619 |
gen_op_clear_mac(acc); |
2620 |
} |
2621 |
|
2622 |
DISAS_INSN(move_mac) |
2623 |
{ |
2624 |
int src;
|
2625 |
int dest;
|
2626 |
src = insn & 3;
|
2627 |
dest = (insn >> 9) & 3; |
2628 |
gen_op_move_mac(dest, src); |
2629 |
gen_op_mac_clear_flags(); |
2630 |
gen_op_mac_set_flags(dest); |
2631 |
} |
2632 |
|
2633 |
DISAS_INSN(from_macsr) |
2634 |
{ |
2635 |
int reg;
|
2636 |
|
2637 |
reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0); |
2638 |
gen_op_mov32(reg, QREG_MACSR); |
2639 |
} |
2640 |
|
2641 |
DISAS_INSN(from_mask) |
2642 |
{ |
2643 |
int reg;
|
2644 |
reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0); |
2645 |
gen_op_mov32(reg, QREG_MAC_MASK); |
2646 |
} |
2647 |
|
2648 |
DISAS_INSN(from_mext) |
2649 |
{ |
2650 |
int reg;
|
2651 |
int acc;
|
2652 |
reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0); |
2653 |
acc = (insn & 0x400) ? 2 : 0; |
2654 |
if (s->env->macsr & MACSR_FI)
|
2655 |
gen_op_get_mac_extf(reg, acc); |
2656 |
else
|
2657 |
gen_op_get_mac_exti(reg, acc); |
2658 |
} |
2659 |
|
2660 |
DISAS_INSN(macsr_to_ccr) |
2661 |
{ |
2662 |
gen_op_mov32(QREG_CC_X, gen_im32(0));
|
2663 |
gen_op_and32(QREG_CC_DEST, QREG_MACSR, gen_im32(0xf));
|
2664 |
s->cc_op = CC_OP_FLAGS; |
2665 |
} |
2666 |
|
2667 |
DISAS_INSN(to_mac) |
2668 |
{ |
2669 |
int acc;
|
2670 |
int val;
|
2671 |
acc = (insn >>9) & 3; |
2672 |
SRC_EA(val, OS_LONG, 0, NULL); |
2673 |
if (s->env->macsr & MACSR_FI) {
|
2674 |
gen_op_set_macf(val, acc); |
2675 |
} else if (s->env->macsr & MACSR_SU) { |
2676 |
gen_op_set_macs(val, acc); |
2677 |
} else {
|
2678 |
gen_op_set_macu(val, acc); |
2679 |
} |
2680 |
gen_op_mac_clear_flags(); |
2681 |
gen_op_mac_set_flags(acc); |
2682 |
} |
2683 |
|
2684 |
DISAS_INSN(to_macsr) |
2685 |
{ |
2686 |
int val;
|
2687 |
SRC_EA(val, OS_LONG, 0, NULL); |
2688 |
gen_op_set_macsr(val); |
2689 |
gen_lookup_tb(s); |
2690 |
} |
2691 |
|
2692 |
DISAS_INSN(to_mask) |
2693 |
{ |
2694 |
int val;
|
2695 |
SRC_EA(val, OS_LONG, 0, NULL); |
2696 |
gen_op_or32(QREG_MAC_MASK, val, gen_im32(0xffff0000));
|
2697 |
} |
2698 |
|
2699 |
DISAS_INSN(to_mext) |
2700 |
{ |
2701 |
int val;
|
2702 |
int acc;
|
2703 |
SRC_EA(val, OS_LONG, 0, NULL); |
2704 |
acc = (insn & 0x400) ? 2 : 0; |
2705 |
if (s->env->macsr & MACSR_FI)
|
2706 |
gen_op_set_mac_extf(val, acc); |
2707 |
else if (s->env->macsr & MACSR_SU) |
2708 |
gen_op_set_mac_exts(val, acc); |
2709 |
else
|
2710 |
gen_op_set_mac_extu(val, acc); |
2711 |
} |
2712 |
|
2713 |
static disas_proc opcode_table[65536]; |
2714 |
|
2715 |
static void |
2716 |
register_opcode (disas_proc proc, uint16_t opcode, uint16_t mask) |
2717 |
{ |
2718 |
int i;
|
2719 |
int from;
|
2720 |
int to;
|
2721 |
|
2722 |
/* Sanity check. All set bits must be included in the mask. */
|
2723 |
if (opcode & ~mask) {
|
2724 |
fprintf(stderr, |
2725 |
"qemu internal error: bogus opcode definition %04x/%04x\n",
|
2726 |
opcode, mask); |
2727 |
abort(); |
2728 |
} |
2729 |
/* This could probably be cleverer. For now just optimize the case where
|
2730 |
the top bits are known. */
|
2731 |
/* Find the first zero bit in the mask. */
|
2732 |
i = 0x8000;
|
2733 |
while ((i & mask) != 0) |
2734 |
i >>= 1;
|
2735 |
/* Iterate over all combinations of this and lower bits. */
|
2736 |
if (i == 0) |
2737 |
i = 1;
|
2738 |
else
|
2739 |
i <<= 1;
|
2740 |
from = opcode & ~(i - 1);
|
2741 |
to = from + i; |
2742 |
for (i = from; i < to; i++) {
|
2743 |
if ((i & mask) == opcode)
|
2744 |
opcode_table[i] = proc; |
2745 |
} |
2746 |
} |
2747 |
|
2748 |
/* Register m68k opcode handlers. Order is important.
|
2749 |
Later insn override earlier ones. */
|
2750 |
void register_m68k_insns (CPUM68KState *env)
|
2751 |
{ |
2752 |
#define INSN(name, opcode, mask, feature) do { \ |
2753 |
if (m68k_feature(env, M68K_FEATURE_##feature)) \ |
2754 |
register_opcode(disas_##name, 0x##opcode, 0x##mask); \ |
2755 |
} while(0) |
2756 |
INSN(undef, 0000, 0000, CF_ISA_A); |
2757 |
INSN(arith_im, 0080, fff8, CF_ISA_A);
|
2758 |
INSN(bitrev, 00c0, fff8, CF_ISA_APLUSC);
|
2759 |
INSN(bitop_reg, 0100, f1c0, CF_ISA_A);
|
2760 |
INSN(bitop_reg, 0140, f1c0, CF_ISA_A);
|
2761 |
INSN(bitop_reg, 0180, f1c0, CF_ISA_A);
|
2762 |
INSN(bitop_reg, 01c0, f1c0, CF_ISA_A);
|
2763 |
INSN(arith_im, 0280, fff8, CF_ISA_A);
|
2764 |
INSN(byterev, 02c0, fff8, CF_ISA_APLUSC);
|
2765 |
INSN(arith_im, 0480, fff8, CF_ISA_A);
|
2766 |
INSN(ff1, 04c0, fff8, CF_ISA_APLUSC);
|
2767 |
INSN(arith_im, 0680, fff8, CF_ISA_A);
|
2768 |
INSN(bitop_im, 0800, ffc0, CF_ISA_A);
|
2769 |
INSN(bitop_im, 0840, ffc0, CF_ISA_A);
|
2770 |
INSN(bitop_im, 0880, ffc0, CF_ISA_A);
|
2771 |
INSN(bitop_im, 08c0, ffc0, CF_ISA_A);
|
2772 |
INSN(arith_im, 0a80, fff8, CF_ISA_A);
|
2773 |
INSN(arith_im, 0c00, ff38, CF_ISA_A);
|
2774 |
INSN(move, 1000, f000, CF_ISA_A);
|
2775 |
INSN(move, 2000, f000, CF_ISA_A);
|
2776 |
INSN(move, 3000, f000, CF_ISA_A);
|
2777 |
INSN(strldsr, 40e7, ffff, CF_ISA_APLUSC); |
2778 |
INSN(negx, 4080, fff8, CF_ISA_A);
|
2779 |
INSN(move_from_sr, 40c0, fff8, CF_ISA_A);
|
2780 |
INSN(lea, 41c0, f1c0, CF_ISA_A);
|
2781 |
INSN(clr, 4200, ff00, CF_ISA_A);
|
2782 |
INSN(undef, 42c0, ffc0, CF_ISA_A);
|
2783 |
INSN(move_from_ccr, 42c0, fff8, CF_ISA_A);
|
2784 |
INSN(neg, 4480, fff8, CF_ISA_A);
|
2785 |
INSN(move_to_ccr, 44c0, ffc0, CF_ISA_A);
|
2786 |
INSN(not, 4680, fff8, CF_ISA_A);
|
2787 |
INSN(move_to_sr, 46c0, ffc0, CF_ISA_A);
|
2788 |
INSN(pea, 4840, ffc0, CF_ISA_A);
|
2789 |
INSN(swap, 4840, fff8, CF_ISA_A);
|
2790 |
INSN(movem, 48c0, fbc0, CF_ISA_A);
|
2791 |
INSN(ext, 4880, fff8, CF_ISA_A);
|
2792 |
INSN(ext, 48c0, fff8, CF_ISA_A);
|
2793 |
INSN(ext, 49c0, fff8, CF_ISA_A);
|
2794 |
INSN(tst, 4a00, ff00, CF_ISA_A);
|
2795 |
INSN(tas, 4ac0, ffc0, CF_ISA_B);
|
2796 |
INSN(halt, 4ac8, ffff, CF_ISA_A);
|
2797 |
INSN(pulse, 4acc, ffff, CF_ISA_A);
|
2798 |
INSN(illegal, 4afc, ffff, CF_ISA_A);
|
2799 |
INSN(mull, 4c00, ffc0, CF_ISA_A);
|
2800 |
INSN(divl, 4c40, ffc0, CF_ISA_A);
|
2801 |
INSN(sats, 4c80, fff8, CF_ISA_B);
|
2802 |
INSN(trap, 4e40, fff0, CF_ISA_A);
|
2803 |
INSN(link, 4e50, fff8, CF_ISA_A);
|
2804 |
INSN(unlk, 4e58, fff8, CF_ISA_A);
|
2805 |
INSN(move_to_usp, 4e60, fff8, USP);
|
2806 |
INSN(move_from_usp, 4e68, fff8, USP);
|
2807 |
INSN(nop, 4e71, ffff, CF_ISA_A);
|
2808 |
INSN(stop, 4e72, ffff, CF_ISA_A);
|
2809 |
INSN(rte, 4e73, ffff, CF_ISA_A);
|
2810 |
INSN(rts, 4e75, ffff, CF_ISA_A);
|
2811 |
INSN(movec, 4e7b, ffff, CF_ISA_A);
|
2812 |
INSN(jump, 4e80, ffc0, CF_ISA_A);
|
2813 |
INSN(jump, 4ec0, ffc0, CF_ISA_A);
|
2814 |
INSN(addsubq, 5180, f1c0, CF_ISA_A);
|
2815 |
INSN(scc, 50c0, f0f8, CF_ISA_A);
|
2816 |
INSN(addsubq, 5080, f1c0, CF_ISA_A);
|
2817 |
INSN(tpf, 51f8, fff8, CF_ISA_A); |
2818 |
|
2819 |
/* Branch instructions. */
|
2820 |
INSN(branch, 6000, f000, CF_ISA_A);
|
2821 |
/* Disable long branch instructions, then add back the ones we want. */
|
2822 |
INSN(undef, 60ff, f0ff, CF_ISA_A); /* All long branches. */ |
2823 |
INSN(branch, 60ff, f0ff, CF_ISA_B); |
2824 |
INSN(undef, 60ff, ffff, CF_ISA_B); /* bra.l */ |
2825 |
INSN(branch, 60ff, ffff, BRAL); |
2826 |
|
2827 |
INSN(moveq, 7000, f100, CF_ISA_A);
|
2828 |
INSN(mvzs, 7100, f100, CF_ISA_B);
|
2829 |
INSN(or, 8000, f000, CF_ISA_A);
|
2830 |
INSN(divw, 80c0, f0c0, CF_ISA_A);
|
2831 |
INSN(addsub, 9000, f000, CF_ISA_A);
|
2832 |
INSN(subx, 9180, f1f8, CF_ISA_A);
|
2833 |
INSN(suba, 91c0, f1c0, CF_ISA_A);
|
2834 |
|
2835 |
INSN(undef_mac, a000, f000, CF_ISA_A); |
2836 |
INSN(mac, a000, f100, CF_EMAC); |
2837 |
INSN(from_mac, a180, f9b0, CF_EMAC); |
2838 |
INSN(move_mac, a110, f9fc, CF_EMAC); |
2839 |
INSN(from_macsr,a980, f9f0, CF_EMAC); |
2840 |
INSN(from_mask, ad80, fff0, CF_EMAC); |
2841 |
INSN(from_mext, ab80, fbf0, CF_EMAC); |
2842 |
INSN(macsr_to_ccr, a9c0, ffff, CF_EMAC); |
2843 |
INSN(to_mac, a100, f9c0, CF_EMAC); |
2844 |
INSN(to_macsr, a900, ffc0, CF_EMAC); |
2845 |
INSN(to_mext, ab00, fbc0, CF_EMAC); |
2846 |
INSN(to_mask, ad00, ffc0, CF_EMAC); |
2847 |
|
2848 |
INSN(mov3q, a140, f1c0, CF_ISA_B); |
2849 |
INSN(cmp, b000, f1c0, CF_ISA_B); /* cmp.b */
|
2850 |
INSN(cmp, b040, f1c0, CF_ISA_B); /* cmp.w */
|
2851 |
INSN(cmpa, b0c0, f1c0, CF_ISA_B); /* cmpa.w */
|
2852 |
INSN(cmp, b080, f1c0, CF_ISA_A); |
2853 |
INSN(cmpa, b1c0, f1c0, CF_ISA_A); |
2854 |
INSN(eor, b180, f1c0, CF_ISA_A); |
2855 |
INSN(and, c000, f000, CF_ISA_A); |
2856 |
INSN(mulw, c0c0, f0c0, CF_ISA_A); |
2857 |
INSN(addsub, d000, f000, CF_ISA_A); |
2858 |
INSN(addx, d180, f1f8, CF_ISA_A); |
2859 |
INSN(adda, d1c0, f1c0, CF_ISA_A); |
2860 |
INSN(shift_im, e080, f0f0, CF_ISA_A); |
2861 |
INSN(shift_reg, e0a0, f0f0, CF_ISA_A); |
2862 |
INSN(undef_fpu, f000, f000, CF_ISA_A); |
2863 |
INSN(fpu, f200, ffc0, CF_FPU); |
2864 |
INSN(fbcc, f280, ffc0, CF_FPU); |
2865 |
INSN(frestore, f340, ffc0, CF_FPU); |
2866 |
INSN(fsave, f340, ffc0, CF_FPU); |
2867 |
INSN(intouch, f340, ffc0, CF_ISA_A); |
2868 |
INSN(cpushl, f428, ff38, CF_ISA_A); |
2869 |
INSN(wddata, fb00, ff00, CF_ISA_A); |
2870 |
INSN(wdebug, fbc0, ffc0, CF_ISA_A); |
2871 |
#undef INSN
|
2872 |
} |
2873 |
|
2874 |
/* ??? Some of this implementation is not exception safe. We should always
|
2875 |
write back the result to memory before setting the condition codes. */
|
2876 |
static void disas_m68k_insn(CPUState * env, DisasContext *s) |
2877 |
{ |
2878 |
uint16_t insn; |
2879 |
|
2880 |
insn = lduw_code(s->pc); |
2881 |
s->pc += 2;
|
2882 |
|
2883 |
opcode_table[insn](s, insn); |
2884 |
} |
2885 |
|
2886 |
#if 0
|
2887 |
/* Save the result of a floating point operation. */
|
2888 |
static void expand_op_fp_result(qOP *qop)
|
2889 |
{
|
2890 |
gen_op_movf64(QREG_FP_RESULT, qop->args[0]);
|
2891 |
}
|
2892 |
|
2893 |
/* Dummy op to indicate that the flags have been set. */
|
2894 |
static void expand_op_flags_set(qOP *qop)
|
2895 |
{
|
2896 |
}
|
2897 |
|
2898 |
/* Convert the confition codes into CC_OP_FLAGS format. */
|
2899 |
static void expand_op_flush_flags(qOP *qop)
|
2900 |
{
|
2901 |
int cc_opreg;
|
2902 |
|
2903 |
if (qop->args[0] == CC_OP_DYNAMIC)
|
2904 |
cc_opreg = QREG_CC_OP;
|
2905 |
else
|
2906 |
cc_opreg = gen_im32(qop->args[0]);
|
2907 |
gen_op_helper32(QREG_NULL, cc_opreg, HELPER_flush_flags);
|
2908 |
}
|
2909 |
|
2910 |
/* Set CC_DEST after a logical or direct flag setting operation. */
|
2911 |
static void expand_op_logic_cc(qOP *qop)
|
2912 |
{
|
2913 |
gen_op_mov32(QREG_CC_DEST, qop->args[0]);
|
2914 |
}
|
2915 |
|
2916 |
/* Set CC_SRC and CC_DEST after an arithmetic operation. */
|
2917 |
static void expand_op_update_cc_add(qOP *qop)
|
2918 |
{
|
2919 |
gen_op_mov32(QREG_CC_DEST, qop->args[0]);
|
2920 |
gen_op_mov32(QREG_CC_SRC, qop->args[1]);
|
2921 |
}
|
2922 |
|
2923 |
/* Update the X flag. */
|
2924 |
static void expand_op_update_xflag(qOP *qop)
|
2925 |
{
|
2926 |
int arg0;
|
2927 |
int arg1;
|
2928 |
|
2929 |
arg0 = qop->args[0];
|
2930 |
arg1 = qop->args[1];
|
2931 |
if (arg1 == QREG_NULL) {
|
2932 |
/* CC_X = arg0. */
|
2933 |
gen_op_mov32(QREG_CC_X, arg0);
|
2934 |
} else {
|
2935 |
/* CC_X = arg0 < (unsigned)arg1. */
|
2936 |
gen_op_set_ltu32(QREG_CC_X, arg0, arg1);
|
2937 |
}
|
2938 |
}
|
2939 |
|
2940 |
/* Set arg0 to the contents of the X flag. */
|
2941 |
static void expand_op_get_xflag(qOP *qop)
|
2942 |
{
|
2943 |
gen_op_mov32(qop->args[0], QREG_CC_X);
|
2944 |
}
|
2945 |
|
2946 |
/* Expand a shift by immediate. The ISA only allows shifts by 1-8, so we
|
2947 |
already know the shift is within range. */
|
2948 |
static inline void expand_shift_im(qOP *qop, int right, int arith)
|
2949 |
{
|
2950 |
int val;
|
2951 |
int reg;
|
2952 |
int tmp;
|
2953 |
int im;
|
2954 |
|
2955 |
reg = qop->args[0];
|
2956 |
im = qop->args[1];
|
2957 |
tmp = gen_im32(im);
|
2958 |
val = gen_new_qreg(QMODE_I32);
|
2959 |
gen_op_mov32(val, reg);
|
2960 |
gen_op_mov32(QREG_CC_DEST, val);
|
2961 |
gen_op_mov32(QREG_CC_SRC, tmp);
|
2962 |
if (right) {
|
2963 |
if (arith) {
|
2964 |
gen_op_sar32(reg, val, tmp);
|
2965 |
} else {
|
2966 |
gen_op_shr32(reg, val, tmp);
|
2967 |
}
|
2968 |
if (im == 1)
|
2969 |
tmp = QREG_NULL;
|
2970 |
else
|
2971 |
tmp = gen_im32(im - 1);
|
2972 |
} else {
|
2973 |
gen_op_shl32(reg, val, tmp);
|
2974 |
tmp = gen_im32(32 - im);
|
2975 |
}
|
2976 |
if (tmp != QREG_NULL)
|
2977 |
gen_op_shr32(val, val, tmp);
|
2978 |
gen_op_and32(QREG_CC_X, val, gen_im32(1));
|
2979 |
}
|
2980 |
|
2981 |
static void expand_op_shl_im_cc(qOP *qop)
|
2982 |
{
|
2983 |
expand_shift_im(qop, 0, 0);
|
2984 |
}
|
2985 |
|
2986 |
static void expand_op_shr_im_cc(qOP *qop)
|
2987 |
{
|
2988 |
expand_shift_im(qop, 1, 0);
|
2989 |
}
|
2990 |
|
2991 |
static void expand_op_sar_im_cc(qOP *qop)
|
2992 |
{
|
2993 |
expand_shift_im(qop, 1, 1);
|
2994 |
}
|
2995 |
|
2996 |
/* Expand a shift by register. */
|
2997 |
/* ??? This gives incorrect answers for shifts by 0 or >= 32 */
|
2998 |
static inline void expand_shift_reg(qOP *qop, int right, int arith)
|
2999 |
{
|
3000 |
int val;
|
3001 |
int reg;
|
3002 |
int shift;
|
3003 |
int tmp;
|
3004 |
|
3005 |
reg = qop->args[0];
|
3006 |
shift = qop->args[1];
|
3007 |
val = gen_new_qreg(QMODE_I32);
|
3008 |
gen_op_mov32(val, reg);
|
3009 |
gen_op_mov32(QREG_CC_DEST, val);
|
3010 |
gen_op_mov32(QREG_CC_SRC, shift);
|
3011 |
tmp = gen_new_qreg(QMODE_I32);
|
3012 |
if (right) {
|
3013 |
if (arith) {
|
3014 |
gen_op_sar32(reg, val, shift);
|
3015 |
} else {
|
3016 |
gen_op_shr32(reg, val, shift);
|
3017 |
}
|
3018 |
gen_op_sub32(tmp, shift, gen_im32(1));
|
3019 |
} else {
|
3020 |
gen_op_shl32(reg, val, shift);
|
3021 |
gen_op_sub32(tmp, gen_im32(31), shift);
|
3022 |
}
|
3023 |
gen_op_shl32(val, val, tmp);
|
3024 |
gen_op_and32(QREG_CC_X, val, gen_im32(1));
|
3025 |
}
|
3026 |
|
3027 |
static void expand_op_shl_cc(qOP *qop)
|
3028 |
{
|
3029 |
expand_shift_reg(qop, 0, 0);
|
3030 |
}
|
3031 |
|
3032 |
static void expand_op_shr_cc(qOP *qop)
|
3033 |
{
|
3034 |
expand_shift_reg(qop, 1, 0);
|
3035 |
}
|
3036 |
|
3037 |
static void expand_op_sar_cc(qOP *qop)
|
3038 |
{
|
3039 |
expand_shift_reg(qop, 1, 1);
|
3040 |
}
|
3041 |
|
3042 |
/* Set the Z flag to (arg0 & arg1) == 0. */
|
3043 |
static void expand_op_btest(qOP *qop)
|
3044 |
{
|
3045 |
int tmp;
|
3046 |
int l1;
|
3047 |
|
3048 |
l1 = gen_new_label();
|
3049 |
tmp = gen_new_qreg(QMODE_I32);
|
3050 |
gen_op_and32(tmp, qop->args[0], qop->args[1]);
|
3051 |
gen_op_and32(QREG_CC_DEST, QREG_CC_DEST, gen_im32(~(uint32_t)CCF_Z));
|
3052 |
gen_op_jmp_nz32(tmp, l1);
|
3053 |
gen_op_or32(QREG_CC_DEST, QREG_CC_DEST, gen_im32(CCF_Z));
|
3054 |
gen_op_label(l1);
|
3055 |
}
|
3056 |
|
3057 |
/* arg0 += arg1 + CC_X */
|
3058 |
static void expand_op_addx_cc(qOP *qop)
|
3059 |
{
|
3060 |
int arg0 = qop->args[0];
|
3061 |
int arg1 = qop->args[1];
|
3062 |
int l1, l2;
|
3063 |
|
3064 |
gen_op_add32 (arg0, arg0, arg1);
|
3065 |
l1 = gen_new_label();
|
3066 |
l2 = gen_new_label();
|
3067 |
gen_op_jmp_z32(QREG_CC_X, l1);
|
3068 |
gen_op_add32(arg0, arg0, gen_im32(1));
|
3069 |
gen_op_mov32(QREG_CC_OP, gen_im32(CC_OP_ADDX));
|
3070 |
gen_op_set_leu32(QREG_CC_X, arg0, arg1);
|
3071 |
gen_op_jmp(l2);
|
3072 |
gen_set_label(l1);
|
3073 |
gen_op_mov32(QREG_CC_OP, gen_im32(CC_OP_ADD));
|
3074 |
gen_op_set_ltu32(QREG_CC_X, arg0, arg1);
|
3075 |
gen_set_label(l2);
|
3076 |
}
|
3077 |
|
3078 |
/* arg0 -= arg1 + CC_X */
|
3079 |
static void expand_op_subx_cc(qOP *qop)
|
3080 |
{
|
3081 |
int arg0 = qop->args[0];
|
3082 |
int arg1 = qop->args[1];
|
3083 |
int l1, l2;
|
3084 |
|
3085 |
l1 = gen_new_label();
|
3086 |
l2 = gen_new_label();
|
3087 |
gen_op_jmp_z32(QREG_CC_X, l1);
|
3088 |
gen_op_set_leu32(QREG_CC_X, arg0, arg1);
|
3089 |
gen_op_sub32(arg0, arg0, gen_im32(1));
|
3090 |
gen_op_mov32(QREG_CC_OP, gen_im32(CC_OP_SUBX));
|
3091 |
gen_op_jmp(l2);
|
3092 |
gen_set_label(l1);
|
3093 |
gen_op_set_ltu32(QREG_CC_X, arg0, arg1);
|
3094 |
gen_op_mov32(QREG_CC_OP, gen_im32(CC_OP_SUB));
|
3095 |
gen_set_label(l2);
|
3096 |
gen_op_sub32 (arg0, arg0, arg1);
|
3097 |
}
|
3098 |
|
3099 |
/* Expand target specific ops to generic qops. */
|
3100 |
static void expand_target_qops(void)
|
3101 |
{
|
3102 |
qOP *qop;
|
3103 |
qOP *next;
|
3104 |
int c;
|
3105 |
|
3106 |
/* Copy the list of qops, expanding target specific ops as we go. */
|
3107 |
qop = gen_first_qop;
|
3108 |
gen_first_qop = NULL;
|
3109 |
gen_last_qop = NULL;
|
3110 |
for (; qop; qop = next) {
|
3111 |
c = qop->opcode;
|
3112 |
next = qop->next;
|
3113 |
if (c < FIRST_TARGET_OP) {
|
3114 |
qop->prev = gen_last_qop;
|
3115 |
qop->next = NULL;
|
3116 |
if (gen_last_qop)
|
3117 |
gen_last_qop->next = qop;
|
3118 |
else
|
3119 |
gen_first_qop = qop;
|
3120 |
gen_last_qop = qop;
|
3121 |
continue;
|
3122 |
}
|
3123 |
switch (c) {
|
3124 |
#define DEF(name, nargs, barrier) \
|
3125 |
case INDEX_op_##name: \
|
3126 |
expand_op_##name(qop); \
|
3127 |
break;
|
3128 |
#include "qop-target.def"
|
3129 |
#undef DEF
|
3130 |
default:
|
3131 |
cpu_abort(NULL, "Unexpanded target qop");
|
3132 |
}
|
3133 |
}
|
3134 |
}
|
3135 |
|
3136 |
/* ??? Implement this. */
|
3137 |
static void
|
3138 |
optimize_flags(void)
|
3139 |
{
|
3140 |
}
|
3141 |
#endif
|
3142 |
|
3143 |
/* generate intermediate code for basic block 'tb'. */
|
3144 |
static inline int |
3145 |
gen_intermediate_code_internal(CPUState *env, TranslationBlock *tb, |
3146 |
int search_pc)
|
3147 |
{ |
3148 |
DisasContext dc1, *dc = &dc1; |
3149 |
uint16_t *gen_opc_end; |
3150 |
int j, lj;
|
3151 |
target_ulong pc_start; |
3152 |
int pc_offset;
|
3153 |
int last_cc_op;
|
3154 |
|
3155 |
/* generate intermediate code */
|
3156 |
pc_start = tb->pc; |
3157 |
|
3158 |
dc->tb = tb; |
3159 |
|
3160 |
gen_opc_ptr = gen_opc_buf; |
3161 |
gen_opc_end = gen_opc_buf + OPC_MAX_SIZE; |
3162 |
gen_opparam_ptr = gen_opparam_buf; |
3163 |
|
3164 |
dc->env = env; |
3165 |
dc->is_jmp = DISAS_NEXT; |
3166 |
dc->pc = pc_start; |
3167 |
dc->cc_op = CC_OP_DYNAMIC; |
3168 |
dc->singlestep_enabled = env->singlestep_enabled; |
3169 |
dc->fpcr = env->fpcr; |
3170 |
dc->user = (env->sr & SR_S) == 0;
|
3171 |
nb_gen_labels = 0;
|
3172 |
lj = -1;
|
3173 |
do {
|
3174 |
free_qreg = 0;
|
3175 |
pc_offset = dc->pc - pc_start; |
3176 |
gen_throws_exception = NULL;
|
3177 |
if (env->nb_breakpoints > 0) { |
3178 |
for(j = 0; j < env->nb_breakpoints; j++) { |
3179 |
if (env->breakpoints[j] == dc->pc) {
|
3180 |
gen_exception(dc, dc->pc, EXCP_DEBUG); |
3181 |
dc->is_jmp = DISAS_JUMP; |
3182 |
break;
|
3183 |
} |
3184 |
} |
3185 |
if (dc->is_jmp)
|
3186 |
break;
|
3187 |
} |
3188 |
if (search_pc) {
|
3189 |
j = gen_opc_ptr - gen_opc_buf; |
3190 |
if (lj < j) {
|
3191 |
lj++; |
3192 |
while (lj < j)
|
3193 |
gen_opc_instr_start[lj++] = 0;
|
3194 |
} |
3195 |
gen_opc_pc[lj] = dc->pc; |
3196 |
gen_opc_instr_start[lj] = 1;
|
3197 |
} |
3198 |
last_cc_op = dc->cc_op; |
3199 |
dc->insn_pc = dc->pc; |
3200 |
disas_m68k_insn(env, dc); |
3201 |
} while (!dc->is_jmp && gen_opc_ptr < gen_opc_end &&
|
3202 |
!env->singlestep_enabled && |
3203 |
(pc_offset) < (TARGET_PAGE_SIZE - 32));
|
3204 |
|
3205 |
if (__builtin_expect(env->singlestep_enabled, 0)) { |
3206 |
/* Make sure the pc is updated, and raise a debug exception. */
|
3207 |
if (!dc->is_jmp) {
|
3208 |
gen_flush_cc_op(dc); |
3209 |
gen_op_mov32(QREG_PC, gen_im32((long)dc->pc));
|
3210 |
} |
3211 |
gen_op_raise_exception(EXCP_DEBUG); |
3212 |
} else {
|
3213 |
switch(dc->is_jmp) {
|
3214 |
case DISAS_NEXT:
|
3215 |
gen_flush_cc_op(dc); |
3216 |
gen_jmp_tb(dc, 0, dc->pc);
|
3217 |
break;
|
3218 |
default:
|
3219 |
case DISAS_JUMP:
|
3220 |
case DISAS_UPDATE:
|
3221 |
gen_flush_cc_op(dc); |
3222 |
/* indicate that the hash table must be used to find the next TB */
|
3223 |
gen_op_mov32(QREG_T0, gen_im32(0));
|
3224 |
gen_op_exit_tb(); |
3225 |
break;
|
3226 |
case DISAS_TB_JUMP:
|
3227 |
/* nothing more to generate */
|
3228 |
break;
|
3229 |
} |
3230 |
} |
3231 |
*gen_opc_ptr = INDEX_op_end; |
3232 |
|
3233 |
#ifdef DEBUG_DISAS
|
3234 |
if (loglevel & CPU_LOG_TB_IN_ASM) {
|
3235 |
fprintf(logfile, "----------------\n");
|
3236 |
fprintf(logfile, "IN: %s\n", lookup_symbol(pc_start));
|
3237 |
target_disas(logfile, pc_start, dc->pc - pc_start, 0);
|
3238 |
fprintf(logfile, "\n");
|
3239 |
if (loglevel & (CPU_LOG_TB_OP)) {
|
3240 |
fprintf(logfile, "OP:\n");
|
3241 |
dump_ops(gen_opc_buf, gen_opparam_buf); |
3242 |
fprintf(logfile, "\n");
|
3243 |
} |
3244 |
} |
3245 |
#endif
|
3246 |
if (search_pc) {
|
3247 |
j = gen_opc_ptr - gen_opc_buf; |
3248 |
lj++; |
3249 |
while (lj <= j)
|
3250 |
gen_opc_instr_start[lj++] = 0;
|
3251 |
tb->size = 0;
|
3252 |
} else {
|
3253 |
tb->size = dc->pc - pc_start; |
3254 |
} |
3255 |
|
3256 |
//optimize_flags();
|
3257 |
//expand_target_qops();
|
3258 |
return 0; |
3259 |
} |
3260 |
|
3261 |
int gen_intermediate_code(CPUState *env, TranslationBlock *tb)
|
3262 |
{ |
3263 |
return gen_intermediate_code_internal(env, tb, 0); |
3264 |
} |
3265 |
|
3266 |
int gen_intermediate_code_pc(CPUState *env, TranslationBlock *tb)
|
3267 |
{ |
3268 |
return gen_intermediate_code_internal(env, tb, 1); |
3269 |
} |
3270 |
|
3271 |
void cpu_reset(CPUM68KState *env)
|
3272 |
{ |
3273 |
memset(env, 0, offsetof(CPUM68KState, breakpoints));
|
3274 |
#if !defined (CONFIG_USER_ONLY)
|
3275 |
env->sr = 0x2700;
|
3276 |
#endif
|
3277 |
m68k_switch_sp(env); |
3278 |
/* ??? FP regs should be initialized to NaN. */
|
3279 |
env->cc_op = CC_OP_FLAGS; |
3280 |
/* TODO: We should set PC from the interrupt vector. */
|
3281 |
env->pc = 0;
|
3282 |
tlb_flush(env, 1);
|
3283 |
} |
3284 |
|
3285 |
CPUM68KState *cpu_m68k_init(void)
|
3286 |
{ |
3287 |
CPUM68KState *env; |
3288 |
|
3289 |
env = malloc(sizeof(CPUM68KState));
|
3290 |
if (!env)
|
3291 |
return NULL; |
3292 |
cpu_exec_init(env); |
3293 |
|
3294 |
cpu_reset(env); |
3295 |
return env;
|
3296 |
} |
3297 |
|
3298 |
void cpu_m68k_close(CPUM68KState *env)
|
3299 |
{ |
3300 |
free(env); |
3301 |
} |
3302 |
|
3303 |
void cpu_dump_state(CPUState *env, FILE *f,
|
3304 |
int (*cpu_fprintf)(FILE *f, const char *fmt, ...), |
3305 |
int flags)
|
3306 |
{ |
3307 |
int i;
|
3308 |
uint16_t sr; |
3309 |
CPU_DoubleU u; |
3310 |
for (i = 0; i < 8; i++) |
3311 |
{ |
3312 |
u.d = env->fregs[i]; |
3313 |
cpu_fprintf (f, "D%d = %08x A%d = %08x F%d = %08x%08x (%12g)\n",
|
3314 |
i, env->dregs[i], i, env->aregs[i], |
3315 |
i, u.l.upper, u.l.lower, u.d); |
3316 |
} |
3317 |
cpu_fprintf (f, "PC = %08x ", env->pc);
|
3318 |
sr = env->sr; |
3319 |
cpu_fprintf (f, "SR = %04x %c%c%c%c%c ", sr, (sr & 0x10) ? 'X' : '-', |
3320 |
(sr & CCF_N) ? 'N' : '-', (sr & CCF_Z) ? 'Z' : '-', |
3321 |
(sr & CCF_V) ? 'V' : '-', (sr & CCF_C) ? 'C' : '-'); |
3322 |
cpu_fprintf (f, "FPRESULT = %12g\n", env->fp_result);
|
3323 |
} |
3324 |
|