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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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|
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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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|
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//#define DEBUG_DISPATCH 1
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|
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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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|
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/* internal defines */
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typedef struct DisasContext { |
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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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|
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#define DISAS_JUMP_NEXT 4 |
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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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typedef void (*disas_proc)(DisasContext *, uint16_t); |
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|
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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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|
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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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|
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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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/* 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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int scale;
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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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offset = s->pc; |
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ext = lduw_code(s->pc); |
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s->pc += 2;
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tmp = ((ext >> 12) & 7) + ((ext & 0x8000) ? QREG_A0 : QREG_D0); |
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/* ??? Check W/L bit. */
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scale = (ext >> 9) & 3; |
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if (scale == 0) { |
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add = tmp; |
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} else {
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add = gen_new_qreg(QMODE_I32); |
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gen_op_shl32(add, tmp, gen_im32(scale)); |
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} |
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tmp = gen_new_qreg(QMODE_I32); |
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if (base != -1) { |
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gen_op_add32(tmp, base, gen_im32((int8_t)ext)); |
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gen_op_add32(tmp, tmp, add); |
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} else {
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gen_op_add32(tmp, add, gen_im32(offset + (int8_t)ext)); |
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} |
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return tmp;
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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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|
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|
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/* Update the CPU env CC_OP state. */
|
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static inline void gen_flush_cc_op(DisasContext *s) |
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{
|
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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)); |
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} |
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|
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/* Evaluate all the CC flags. */
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static inline void gen_flush_flags(DisasContext *s) |
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{
|
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if (s->cc_op == CC_OP_FLAGS)
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return;
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gen_op_flush_flags(s->cc_op); |
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s->cc_op = CC_OP_FLAGS; |
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} |
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|
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static inline int opsize_bytes(int opsize) |
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{
|
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switch (opsize) {
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case OS_BYTE: return 1; |
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case OS_WORD: return 2; |
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case OS_LONG: return 4; |
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case OS_SINGLE: return 4; |
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case OS_DOUBLE: return 8; |
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default:
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qemu_assert(0, "bad operand size"); |
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} |
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} |
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|
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/* Assign value to a register. If the width is less than the register width
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only the low part of the register is set. */
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static void gen_partset_reg(int opsize, int reg, int val) |
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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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gen_op_and32(reg, reg, gen_im32(0xffffff00));
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tmp = gen_new_qreg(QMODE_I32); |
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gen_op_and32(tmp, val, gen_im32(0xff));
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gen_op_or32(reg, reg, tmp); |
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break;
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case OS_WORD:
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gen_op_and32(reg, reg, gen_im32(0xffff0000));
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tmp = gen_new_qreg(QMODE_I32); |
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gen_op_and32(tmp, val, gen_im32(0xffff));
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gen_op_or32(reg, reg, tmp); |
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break;
|
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case OS_LONG:
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gen_op_mov32(reg, val); |
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break;
|
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case OS_SINGLE:
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gen_op_pack_32_f32(reg, val); |
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break;
|
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default:
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qemu_assert(0, "Bad operand size"); |
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break;
|
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} |
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} |
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|
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/* Sign or zero extend a value. */
|
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static inline int gen_extend(int val, int opsize, int sign) |
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{
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int tmp;
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|
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switch (opsize) {
|
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case OS_BYTE:
|
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tmp = gen_new_qreg(QMODE_I32); |
| 312 |
if (sign)
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gen_op_ext8s32(tmp, val); |
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else
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gen_op_ext8u32(tmp, val); |
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break;
|
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case OS_WORD:
|
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tmp = gen_new_qreg(QMODE_I32); |
| 319 |
if (sign)
|
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gen_op_ext16s32(tmp, val); |
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else
|
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gen_op_ext16u32(tmp, val); |
| 323 |
break;
|
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case OS_LONG:
|
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tmp = val; |
| 326 |
break;
|
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case OS_SINGLE:
|
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tmp = gen_new_qreg(QMODE_F32); |
| 329 |
gen_op_pack_f32_32(tmp, val); |
| 330 |
break;
|
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default:
|
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qemu_assert(0, "Bad operand size"); |
| 333 |
} |
| 334 |
return tmp;
|
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} |
| 336 |
|
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/* Generate code for an "effective address". Does not adjust the base
|
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register for autoincrememnt addressing modes. */
|
| 339 |
static int gen_lea(DisasContext *s, uint16_t insn, int opsize) |
| 340 |
{
|
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int reg;
|
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int tmp;
|
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uint16_t ext; |
| 344 |
uint32_t offset; |
| 345 |
|
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reg = insn & 7;
|
| 347 |
switch ((insn >> 3) & 7) { |
| 348 |
case 0: /* Data register direct. */ |
| 349 |
case 1: /* Address register direct. */ |
| 350 |
/* ??? generate bad addressing mode fault. */
|
| 351 |
qemu_assert(0, "invalid addressing mode"); |
| 352 |
case 2: /* Indirect register */ |
| 353 |
case 3: /* Indirect postincrement. */ |
| 354 |
reg += QREG_A0; |
| 355 |
return reg;
|
| 356 |
case 4: /* Indirect predecrememnt. */ |
| 357 |
reg += QREG_A0; |
| 358 |
tmp = gen_new_qreg(QMODE_I32); |
| 359 |
gen_op_sub32(tmp, reg, gen_im32(opsize_bytes(opsize))); |
| 360 |
return tmp;
|
| 361 |
case 5: /* Indirect displacement. */ |
| 362 |
reg += QREG_A0; |
| 363 |
tmp = gen_new_qreg(QMODE_I32); |
| 364 |
ext = lduw_code(s->pc); |
| 365 |
s->pc += 2;
|
| 366 |
gen_op_add32(tmp, reg, gen_im32((int16_t)ext)); |
| 367 |
return tmp;
|
| 368 |
case 6: /* Indirect index + displacement. */ |
| 369 |
reg += QREG_A0; |
| 370 |
return gen_lea_indexed(s, opsize, reg);
|
| 371 |
case 7: /* Other */ |
| 372 |
switch (reg) {
|
| 373 |
case 0: /* Absolute short. */ |
| 374 |
offset = ldsw_code(s->pc); |
| 375 |
s->pc += 2;
|
| 376 |
return gen_im32(offset);
|
| 377 |
case 1: /* Absolute long. */ |
| 378 |
offset = read_im32(s); |
| 379 |
return gen_im32(offset);
|
| 380 |
case 2: /* pc displacement */ |
| 381 |
tmp = gen_new_qreg(QMODE_I32); |
| 382 |
offset = s->pc; |
| 383 |
offset += ldsw_code(s->pc); |
| 384 |
s->pc += 2;
|
| 385 |
return gen_im32(offset);
|
| 386 |
case 3: /* pc index+displacement. */ |
| 387 |
return gen_lea_indexed(s, opsize, -1); |
| 388 |
case 4: /* Immediate. */ |
| 389 |
default:
|
| 390 |
/* ??? generate bad addressing mode fault. */
|
| 391 |
qemu_assert(0, "invalid addressing mode"); |
| 392 |
} |
| 393 |
} |
| 394 |
/* Should never happen. */
|
| 395 |
return -1; |
| 396 |
} |
| 397 |
|
| 398 |
/* Helper function for gen_ea. Reuse the computed address between the
|
| 399 |
for read/write operands. */
|
| 400 |
static inline int gen_ea_once(DisasContext *s, uint16_t insn, int opsize, |
| 401 |
int val, int *addrp) |
| 402 |
{
|
| 403 |
int tmp;
|
| 404 |
|
| 405 |
if (addrp && val > 0) { |
| 406 |
tmp = *addrp; |
| 407 |
} else {
|
| 408 |
tmp = gen_lea(s, insn, opsize); |
| 409 |
if (addrp)
|
| 410 |
*addrp = tmp; |
| 411 |
} |
| 412 |
return gen_ldst(s, opsize, tmp, val);
|
| 413 |
} |
| 414 |
|
| 415 |
/* Generate code to load/store a value ito/from an EA. If VAL > 0 this is
|
| 416 |
a write otherwise it is a read (0 == sign extend, -1 == zero extend).
|
| 417 |
ADDRP is non-null for readwrite operands. */
|
| 418 |
static int gen_ea(DisasContext *s, uint16_t insn, int opsize, int val, |
| 419 |
int *addrp)
|
| 420 |
{
|
| 421 |
int reg;
|
| 422 |
int result;
|
| 423 |
uint32_t offset; |
| 424 |
|
| 425 |
reg = insn & 7;
|
| 426 |
switch ((insn >> 3) & 7) { |
| 427 |
case 0: /* Data register direct. */ |
| 428 |
reg += QREG_D0; |
| 429 |
if (val > 0) { |
| 430 |
gen_partset_reg(opsize, reg, val); |
| 431 |
return 0; |
| 432 |
} else {
|
| 433 |
return gen_extend(reg, opsize, val);
|
| 434 |
} |
| 435 |
case 1: /* Address register direct. */ |
| 436 |
reg += QREG_A0; |
| 437 |
if (val > 0) { |
| 438 |
gen_op_mov32(reg, val); |
| 439 |
return 0; |
| 440 |
} else {
|
| 441 |
return gen_extend(reg, opsize, val);
|
| 442 |
} |
| 443 |
case 2: /* Indirect register */ |
| 444 |
reg += QREG_A0; |
| 445 |
return gen_ldst(s, opsize, reg, val);
|
| 446 |
case 3: /* Indirect postincrement. */ |
| 447 |
reg += QREG_A0; |
| 448 |
result = gen_ldst(s, opsize, reg, val); |
| 449 |
/* ??? This is not exception safe. The instruction may still
|
| 450 |
fault after this point. */
|
| 451 |
if (val > 0 || !addrp) |
| 452 |
gen_op_add32(reg, reg, gen_im32(opsize_bytes(opsize))); |
| 453 |
return result;
|
| 454 |
case 4: /* Indirect predecrememnt. */ |
| 455 |
{
|
| 456 |
int tmp;
|
| 457 |
if (addrp && val > 0) { |
| 458 |
tmp = *addrp; |
| 459 |
} else {
|
| 460 |
tmp = gen_lea(s, insn, opsize); |
| 461 |
if (addrp)
|
| 462 |
*addrp = tmp; |
| 463 |
} |
| 464 |
result = gen_ldst(s, opsize, tmp, val); |
| 465 |
/* ??? This is not exception safe. The instruction may still
|
| 466 |
fault after this point. */
|
| 467 |
if (val > 0 || !addrp) { |
| 468 |
reg += QREG_A0; |
| 469 |
gen_op_mov32(reg, tmp); |
| 470 |
} |
| 471 |
} |
| 472 |
return result;
|
| 473 |
case 5: /* Indirect displacement. */ |
| 474 |
case 6: /* Indirect index + displacement. */ |
| 475 |
return gen_ea_once(s, insn, opsize, val, addrp);
|
| 476 |
case 7: /* Other */ |
| 477 |
switch (reg) {
|
| 478 |
case 0: /* Absolute short. */ |
| 479 |
case 1: /* Absolute long. */ |
| 480 |
case 2: /* pc displacement */ |
| 481 |
case 3: /* pc index+displacement. */ |
| 482 |
return gen_ea_once(s, insn, opsize, val, addrp);
|
| 483 |
case 4: /* Immediate. */ |
| 484 |
/* Sign extend values for consistency. */
|
| 485 |
switch (opsize) {
|
| 486 |
case OS_BYTE:
|
| 487 |
if (val)
|
| 488 |
offset = ldsb_code(s->pc + 1);
|
| 489 |
else
|
| 490 |
offset = ldub_code(s->pc + 1);
|
| 491 |
s->pc += 2;
|
| 492 |
break;
|
| 493 |
case OS_WORD:
|
| 494 |
if (val)
|
| 495 |
offset = ldsw_code(s->pc); |
| 496 |
else
|
| 497 |
offset = lduw_code(s->pc); |
| 498 |
s->pc += 2;
|
| 499 |
break;
|
| 500 |
case OS_LONG:
|
| 501 |
offset = read_im32(s); |
| 502 |
break;
|
| 503 |
default:
|
| 504 |
qemu_assert(0, "Bad immediate operand"); |
| 505 |
} |
| 506 |
return gen_im32(offset);
|
| 507 |
default:
|
| 508 |
qemu_assert(0, "invalid addressing mode"); |
| 509 |
} |
| 510 |
} |
| 511 |
/* Should never happen. */
|
| 512 |
return -1; |
| 513 |
} |
| 514 |
|
| 515 |
static void gen_logic_cc(DisasContext *s, int val) |
| 516 |
{
|
| 517 |
gen_op_logic_cc(val); |
| 518 |
s->cc_op = CC_OP_LOGIC; |
| 519 |
} |
| 520 |
|
| 521 |
static void gen_jmpcc(DisasContext *s, int cond, int l1) |
| 522 |
{
|
| 523 |
int tmp;
|
| 524 |
|
| 525 |
gen_flush_flags(s); |
| 526 |
switch (cond) {
|
| 527 |
case 0: /* T */ |
| 528 |
gen_op_jmp(l1); |
| 529 |
break;
|
| 530 |
case 1: /* F */ |
| 531 |
break;
|
| 532 |
case 2: /* HI (!C && !Z) */ |
| 533 |
tmp = gen_new_qreg(QMODE_I32); |
| 534 |
gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_C | CCF_Z)); |
| 535 |
gen_op_jmp_z32(tmp, l1); |
| 536 |
break;
|
| 537 |
case 3: /* LS (C || Z) */ |
| 538 |
tmp = gen_new_qreg(QMODE_I32); |
| 539 |
gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_C | CCF_Z)); |
| 540 |
gen_op_jmp_nz32(tmp, l1); |
| 541 |
break;
|
| 542 |
case 4: /* CC (!C) */ |
| 543 |
tmp = gen_new_qreg(QMODE_I32); |
| 544 |
gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_C)); |
| 545 |
gen_op_jmp_z32(tmp, l1); |
| 546 |
break;
|
| 547 |
case 5: /* CS (C) */ |
| 548 |
tmp = gen_new_qreg(QMODE_I32); |
| 549 |
gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_C)); |
| 550 |
gen_op_jmp_nz32(tmp, l1); |
| 551 |
break;
|
| 552 |
case 6: /* NE (!Z) */ |
| 553 |
tmp = gen_new_qreg(QMODE_I32); |
| 554 |
gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_Z)); |
| 555 |
gen_op_jmp_z32(tmp, l1); |
| 556 |
break;
|
| 557 |
case 7: /* EQ (Z) */ |
| 558 |
tmp = gen_new_qreg(QMODE_I32); |
| 559 |
gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_Z)); |
| 560 |
gen_op_jmp_nz32(tmp, l1); |
| 561 |
break;
|
| 562 |
case 8: /* VC (!V) */ |
| 563 |
tmp = gen_new_qreg(QMODE_I32); |
| 564 |
gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_V)); |
| 565 |
gen_op_jmp_z32(tmp, l1); |
| 566 |
break;
|
| 567 |
case 9: /* VS (V) */ |
| 568 |
tmp = gen_new_qreg(QMODE_I32); |
| 569 |
gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_V)); |
| 570 |
gen_op_jmp_nz32(tmp, l1); |
| 571 |
break;
|
| 572 |
case 10: /* PL (!N) */ |
| 573 |
tmp = gen_new_qreg(QMODE_I32); |
| 574 |
gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_N)); |
| 575 |
gen_op_jmp_z32(tmp, l1); |
| 576 |
break;
|
| 577 |
case 11: /* MI (N) */ |
| 578 |
tmp = gen_new_qreg(QMODE_I32); |
| 579 |
gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_N)); |
| 580 |
gen_op_jmp_nz32(tmp, l1); |
| 581 |
break;
|
| 582 |
case 12: /* GE (!(N ^ V)) */ |
| 583 |
tmp = gen_new_qreg(QMODE_I32); |
| 584 |
gen_op_shr32(tmp, QREG_CC_DEST, gen_im32(2));
|
| 585 |
gen_op_xor32(tmp, tmp, QREG_CC_DEST); |
| 586 |
gen_op_and32(tmp, tmp, gen_im32(CCF_V)); |
| 587 |
gen_op_jmp_z32(tmp, l1); |
| 588 |
break;
|
| 589 |
case 13: /* LT (N ^ V) */ |
| 590 |
tmp = gen_new_qreg(QMODE_I32); |
| 591 |
gen_op_shr32(tmp, QREG_CC_DEST, gen_im32(2));
|
| 592 |
gen_op_xor32(tmp, tmp, QREG_CC_DEST); |
| 593 |
gen_op_and32(tmp, tmp, gen_im32(CCF_V)); |
| 594 |
gen_op_jmp_nz32(tmp, l1); |
| 595 |
break;
|
| 596 |
case 14: /* GT (!(Z || (N ^ V))) */ |
| 597 |
{
|
| 598 |
int l2;
|
| 599 |
l2 = gen_new_label(); |
| 600 |
tmp = gen_new_qreg(QMODE_I32); |
| 601 |
gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_Z)); |
| 602 |
gen_op_jmp_nz32(tmp, l2); |
| 603 |
tmp = gen_new_qreg(QMODE_I32); |
| 604 |
gen_op_shr32(tmp, QREG_CC_DEST, gen_im32(2));
|
| 605 |
gen_op_xor32(tmp, tmp, QREG_CC_DEST); |
| 606 |
gen_op_and32(tmp, tmp, gen_im32(CCF_V)); |
| 607 |
gen_op_jmp_nz32(tmp, l2); |
| 608 |
gen_op_jmp(l1); |
| 609 |
gen_set_label(l2); |
| 610 |
} |
| 611 |
break;
|
| 612 |
case 15: /* LE (Z || (N ^ V)) */ |
| 613 |
tmp = gen_new_qreg(QMODE_I32); |
| 614 |
gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_Z)); |
| 615 |
gen_op_jmp_nz32(tmp, l1); |
| 616 |
tmp = gen_new_qreg(QMODE_I32); |
| 617 |
gen_op_shr32(tmp, QREG_CC_DEST, gen_im32(2));
|
| 618 |
gen_op_xor32(tmp, tmp, QREG_CC_DEST); |
| 619 |
gen_op_and32(tmp, tmp, gen_im32(CCF_V)); |
| 620 |
gen_op_jmp_nz32(tmp, l1); |
| 621 |
break;
|
| 622 |
default:
|
| 623 |
/* Should ever happen. */
|
| 624 |
abort(); |
| 625 |
} |
| 626 |
} |
| 627 |
|
| 628 |
DISAS_INSN(scc) |
| 629 |
{
|
| 630 |
int l1;
|
| 631 |
int cond;
|
| 632 |
int reg;
|
| 633 |
|
| 634 |
l1 = gen_new_label(); |
| 635 |
cond = (insn >> 8) & 0xf; |
| 636 |
reg = DREG(insn, 0);
|
| 637 |
gen_op_and32(reg, reg, gen_im32(0xffffff00));
|
| 638 |
gen_jmpcc(s, cond ^ 1, l1);
|
| 639 |
gen_op_or32(reg, reg, gen_im32(0xff));
|
| 640 |
gen_set_label(l1); |
| 641 |
} |
| 642 |
|
| 643 |
/* Force a TB lookup after an instruction that changes the CPU state. */
|
| 644 |
static void gen_lookup_tb(DisasContext *s) |
| 645 |
{
|
| 646 |
gen_flush_cc_op(s); |
| 647 |
gen_op_mov32(QREG_PC, gen_im32(s->pc)); |
| 648 |
s->is_jmp = DISAS_UPDATE; |
| 649 |
} |
| 650 |
|
| 651 |
/* Generate a jump to to the address in qreg DEST. */
|
| 652 |
static void gen_jmp(DisasContext *s, int dest) |
| 653 |
{
|
| 654 |
gen_flush_cc_op(s); |
| 655 |
gen_op_mov32(QREG_PC, dest); |
| 656 |
s->is_jmp = DISAS_JUMP; |
| 657 |
} |
| 658 |
|
| 659 |
static void gen_exception(DisasContext *s, uint32_t where, int nr) |
| 660 |
{
|
| 661 |
gen_flush_cc_op(s); |
| 662 |
gen_jmp(s, gen_im32(where)); |
| 663 |
gen_op_raise_exception(nr); |
| 664 |
} |
| 665 |
|
| 666 |
/* Generate a jump to an immediate address. */
|
| 667 |
static void gen_jmp_tb(DisasContext *s, int n, uint32_t dest) |
| 668 |
{
|
| 669 |
TranslationBlock *tb; |
| 670 |
|
| 671 |
tb = s->tb; |
| 672 |
if (__builtin_expect (s->singlestep_enabled, 0)) { |
| 673 |
gen_exception(s, dest, EXCP_DEBUG); |
| 674 |
} else if ((tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK) || |
| 675 |
(s->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK)) {
|
| 676 |
gen_op_goto_tb(0, n, (long)tb); |
| 677 |
gen_op_mov32(QREG_PC, gen_im32(dest)); |
| 678 |
gen_op_mov32(QREG_T0, gen_im32((long)tb + n));
|
| 679 |
gen_op_exit_tb(); |
| 680 |
} else {
|
| 681 |
gen_jmp(s, gen_im32(dest)); |
| 682 |
gen_op_mov32(QREG_T0, gen_im32(0));
|
| 683 |
gen_op_exit_tb(); |
| 684 |
} |
| 685 |
s->is_jmp = DISAS_TB_JUMP; |
| 686 |
} |
| 687 |
|
| 688 |
DISAS_INSN(undef_mac) |
| 689 |
{
|
| 690 |
gen_exception(s, s->pc - 2, EXCP_LINEA);
|
| 691 |
} |
| 692 |
|
| 693 |
DISAS_INSN(undef_fpu) |
| 694 |
{
|
| 695 |
gen_exception(s, s->pc - 2, EXCP_LINEF);
|
| 696 |
} |
| 697 |
|
| 698 |
DISAS_INSN(undef) |
| 699 |
{
|
| 700 |
gen_exception(s, s->pc - 2, EXCP_UNSUPPORTED);
|
| 701 |
cpu_abort(cpu_single_env, "Illegal instruction: %04x @ %08x",
|
| 702 |
insn, s->pc - 2);
|
| 703 |
} |
| 704 |
|
| 705 |
DISAS_INSN(mulw) |
| 706 |
{
|
| 707 |
int reg;
|
| 708 |
int tmp;
|
| 709 |
int src;
|
| 710 |
int sign;
|
| 711 |
|
| 712 |
sign = (insn & 0x100) != 0; |
| 713 |
reg = DREG(insn, 9);
|
| 714 |
tmp = gen_new_qreg(QMODE_I32); |
| 715 |
if (sign)
|
| 716 |
gen_op_ext16s32(tmp, reg); |
| 717 |
else
|
| 718 |
gen_op_ext16u32(tmp, reg); |
| 719 |
src = gen_ea(s, insn, OS_WORD, sign ? -1 : 0, NULL); |
| 720 |
gen_op_mul32(tmp, tmp, src); |
| 721 |
gen_op_mov32(reg, tmp); |
| 722 |
/* Unlike m68k, coldfire always clears the overflow bit. */
|
| 723 |
gen_logic_cc(s, tmp); |
| 724 |
} |
| 725 |
|
| 726 |
DISAS_INSN(divw) |
| 727 |
{
|
| 728 |
int reg;
|
| 729 |
int tmp;
|
| 730 |
int src;
|
| 731 |
int sign;
|
| 732 |
|
| 733 |
sign = (insn & 0x100) != 0; |
| 734 |
reg = DREG(insn, 9);
|
| 735 |
if (sign) {
|
| 736 |
gen_op_ext16s32(QREG_DIV1, reg); |
| 737 |
} else {
|
| 738 |
gen_op_ext16u32(QREG_DIV1, reg); |
| 739 |
} |
| 740 |
src = gen_ea(s, insn, OS_WORD, sign ? -1 : 0, NULL); |
| 741 |
gen_op_mov32(QREG_DIV2, src); |
| 742 |
if (sign) {
|
| 743 |
gen_op_divs(1);
|
| 744 |
} else {
|
| 745 |
gen_op_divu(1);
|
| 746 |
} |
| 747 |
|
| 748 |
tmp = gen_new_qreg(QMODE_I32); |
| 749 |
src = gen_new_qreg(QMODE_I32); |
| 750 |
gen_op_ext16u32(tmp, QREG_DIV1); |
| 751 |
gen_op_shl32(src, QREG_DIV2, gen_im32(16));
|
| 752 |
gen_op_or32(reg, tmp, src); |
| 753 |
gen_op_flags_set(); |
| 754 |
s->cc_op = CC_OP_FLAGS; |
| 755 |
} |
| 756 |
|
| 757 |
DISAS_INSN(divl) |
| 758 |
{
|
| 759 |
int num;
|
| 760 |
int den;
|
| 761 |
int reg;
|
| 762 |
uint16_t ext; |
| 763 |
|
| 764 |
ext = lduw_code(s->pc); |
| 765 |
s->pc += 2;
|
| 766 |
if (ext & 0x87f8) { |
| 767 |
gen_exception(s, s->pc - 4, EXCP_UNSUPPORTED);
|
| 768 |
return;
|
| 769 |
} |
| 770 |
num = DREG(ext, 12);
|
| 771 |
reg = DREG(ext, 0);
|
| 772 |
gen_op_mov32(QREG_DIV1, num); |
| 773 |
den = gen_ea(s, insn, OS_LONG, 0, NULL); |
| 774 |
gen_op_mov32(QREG_DIV2, den); |
| 775 |
if (ext & 0x0800) { |
| 776 |
gen_op_divs(2);
|
| 777 |
} else {
|
| 778 |
gen_op_divu(2);
|
| 779 |
} |
| 780 |
if (num == reg) {
|
| 781 |
/* div */
|
| 782 |
gen_op_mov32 (reg, QREG_DIV1); |
| 783 |
} else {
|
| 784 |
/* rem */
|
| 785 |
gen_op_mov32 (reg, QREG_DIV2); |
| 786 |
} |
| 787 |
gen_op_flags_set(); |
| 788 |
s->cc_op = CC_OP_FLAGS; |
| 789 |
} |
| 790 |
|
| 791 |
DISAS_INSN(addsub) |
| 792 |
{
|
| 793 |
int reg;
|
| 794 |
int dest;
|
| 795 |
int src;
|
| 796 |
int tmp;
|
| 797 |
int addr;
|
| 798 |
int add;
|
| 799 |
|
| 800 |
add = (insn & 0x4000) != 0; |
| 801 |
reg = DREG(insn, 9);
|
| 802 |
dest = gen_new_qreg(QMODE_I32); |
| 803 |
if (insn & 0x100) { |
| 804 |
tmp = gen_ea(s, insn, OS_LONG, 0, &addr);
|
| 805 |
src = reg; |
| 806 |
} else {
|
| 807 |
tmp = reg; |
| 808 |
src = gen_ea(s, insn, OS_LONG, 0, NULL); |
| 809 |
} |
| 810 |
if (add) {
|
| 811 |
gen_op_add32(dest, tmp, src); |
| 812 |
gen_op_update_xflag_lt(dest, src); |
| 813 |
s->cc_op = CC_OP_ADD; |
| 814 |
} else {
|
| 815 |
gen_op_update_xflag_lt(tmp, src); |
| 816 |
gen_op_sub32(dest, tmp, src); |
| 817 |
s->cc_op = CC_OP_SUB; |
| 818 |
} |
| 819 |
gen_op_update_cc_add(dest, src); |
| 820 |
if (insn & 0x100) { |
| 821 |
gen_ea(s, insn, OS_LONG, dest, &addr); |
| 822 |
} else {
|
| 823 |
gen_op_mov32(reg, dest); |
| 824 |
} |
| 825 |
} |
| 826 |
|
| 827 |
|
| 828 |
/* Reverse the order of the bits in REG. */
|
| 829 |
DISAS_INSN(bitrev) |
| 830 |
{
|
| 831 |
int val;
|
| 832 |
int tmp1;
|
| 833 |
int tmp2;
|
| 834 |
int reg;
|
| 835 |
|
| 836 |
val = gen_new_qreg(QMODE_I32); |
| 837 |
tmp1 = gen_new_qreg(QMODE_I32); |
| 838 |
tmp2 = gen_new_qreg(QMODE_I32); |
| 839 |
reg = DREG(insn, 0);
|
| 840 |
gen_op_mov32(val, reg); |
| 841 |
/* Reverse bits within each nibble. */
|
| 842 |
gen_op_shl32(tmp1, val, gen_im32(3));
|
| 843 |
gen_op_and32(tmp1, tmp1, gen_im32(0x88888888));
|
| 844 |
gen_op_shl32(tmp2, val, gen_im32(1));
|
| 845 |
gen_op_and32(tmp2, tmp2, gen_im32(0x44444444));
|
| 846 |
gen_op_or32(tmp1, tmp1, tmp2); |
| 847 |
gen_op_shr32(tmp2, val, gen_im32(1));
|
| 848 |
gen_op_and32(tmp2, tmp2, gen_im32(0x22222222));
|
| 849 |
gen_op_or32(tmp1, tmp1, tmp2); |
| 850 |
gen_op_shr32(tmp2, val, gen_im32(3));
|
| 851 |
gen_op_and32(tmp2, tmp2, gen_im32(0x11111111));
|
| 852 |
gen_op_or32(tmp1, tmp1, tmp2); |
| 853 |
/* Reverse nibbles withing bytes. */
|
| 854 |
gen_op_shl32(val, tmp1, gen_im32(4));
|
| 855 |
gen_op_and32(val, val, gen_im32(0xf0f0f0f0));
|
| 856 |
gen_op_shr32(tmp2, tmp1, gen_im32(4));
|
| 857 |
gen_op_and32(tmp2, tmp2, gen_im32(0x0f0f0f0f));
|
| 858 |
gen_op_or32(val, val, tmp2); |
| 859 |
/* Reverse bytes. */
|
| 860 |
gen_op_bswap32(reg, val); |
| 861 |
gen_op_mov32(reg, val); |
| 862 |
} |
| 863 |
|
| 864 |
DISAS_INSN(bitop_reg) |
| 865 |
{
|
| 866 |
int opsize;
|
| 867 |
int op;
|
| 868 |
int src1;
|
| 869 |
int src2;
|
| 870 |
int tmp;
|
| 871 |
int addr;
|
| 872 |
int dest;
|
| 873 |
|
| 874 |
if ((insn & 0x38) != 0) |
| 875 |
opsize = OS_BYTE; |
| 876 |
else
|
| 877 |
opsize = OS_LONG; |
| 878 |
op = (insn >> 6) & 3; |
| 879 |
src1 = gen_ea(s, insn, opsize, 0, op ? &addr: NULL); |
| 880 |
src2 = DREG(insn, 9);
|
| 881 |
dest = gen_new_qreg(QMODE_I32); |
| 882 |
|
| 883 |
gen_flush_flags(s); |
| 884 |
tmp = gen_new_qreg(QMODE_I32); |
| 885 |
if (opsize == OS_BYTE)
|
| 886 |
gen_op_and32(tmp, src2, gen_im32(7));
|
| 887 |
else
|
| 888 |
gen_op_and32(tmp, src2, gen_im32(31));
|
| 889 |
src2 = tmp; |
| 890 |
tmp = gen_new_qreg(QMODE_I32); |
| 891 |
gen_op_shl32(tmp, gen_im32(1), src2);
|
| 892 |
|
| 893 |
gen_op_btest(src1, tmp); |
| 894 |
switch (op) {
|
| 895 |
case 1: /* bchg */ |
| 896 |
gen_op_xor32(dest, src1, tmp); |
| 897 |
break;
|
| 898 |
case 2: /* bclr */ |
| 899 |
gen_op_not32(tmp, tmp); |
| 900 |
gen_op_and32(dest, src1, tmp); |
| 901 |
break;
|
| 902 |
case 3: /* bset */ |
| 903 |
gen_op_or32(dest, src1, tmp); |
| 904 |
break;
|
| 905 |
default: /* btst */ |
| 906 |
break;
|
| 907 |
} |
| 908 |
if (op)
|
| 909 |
gen_ea(s, insn, opsize, dest, &addr); |
| 910 |
} |
| 911 |
|
| 912 |
DISAS_INSN(sats) |
| 913 |
{
|
| 914 |
int reg;
|
| 915 |
int tmp;
|
| 916 |
int l1;
|
| 917 |
|
| 918 |
reg = DREG(insn, 0);
|
| 919 |
tmp = gen_new_qreg(QMODE_I32); |
| 920 |
gen_flush_flags(s); |
| 921 |
gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_V)); |
| 922 |
l1 = gen_new_label(); |
| 923 |
gen_op_jmp_z32(tmp, l1); |
| 924 |
tmp = gen_new_qreg(QMODE_I32); |
| 925 |
gen_op_shr32(tmp, reg, gen_im32(31));
|
| 926 |
gen_op_xor32(tmp, tmp, gen_im32(0x80000000));
|
| 927 |
gen_op_mov32(reg, tmp); |
| 928 |
gen_set_label(l1); |
| 929 |
gen_logic_cc(s, tmp); |
| 930 |
} |
| 931 |
|
| 932 |
static void gen_push(DisasContext *s, int val) |
| 933 |
{
|
| 934 |
int tmp;
|
| 935 |
|
| 936 |
tmp = gen_new_qreg(QMODE_I32); |
| 937 |
gen_op_sub32(tmp, QREG_SP, gen_im32(4));
|
| 938 |
gen_store(s, OS_LONG, tmp, val); |
| 939 |
gen_op_mov32(QREG_SP, tmp); |
| 940 |
} |
| 941 |
|
| 942 |
DISAS_INSN(movem) |
| 943 |
{
|
| 944 |
int addr;
|
| 945 |
int i;
|
| 946 |
uint16_t mask; |
| 947 |
int reg;
|
| 948 |
int tmp;
|
| 949 |
int is_load;
|
| 950 |
|
| 951 |
mask = lduw_code(s->pc); |
| 952 |
s->pc += 2;
|
| 953 |
tmp = gen_lea(s, insn, OS_LONG); |
| 954 |
addr = gen_new_qreg(QMODE_I32); |
| 955 |
gen_op_mov32(addr, tmp); |
| 956 |
is_load = ((insn & 0x0400) != 0); |
| 957 |
for (i = 0; i < 16; i++, mask >>= 1) { |
| 958 |
if (mask & 1) { |
| 959 |
if (i < 8) |
| 960 |
reg = DREG(i, 0);
|
| 961 |
else
|
| 962 |
reg = AREG(i, 0);
|
| 963 |
if (is_load) {
|
| 964 |
tmp = gen_load(s, OS_LONG, addr, 0);
|
| 965 |
gen_op_mov32(reg, tmp); |
| 966 |
} else {
|
| 967 |
gen_store(s, OS_LONG, addr, reg); |
| 968 |
} |
| 969 |
if (mask != 1) |
| 970 |
gen_op_add32(addr, addr, gen_im32(4));
|
| 971 |
} |
| 972 |
} |
| 973 |
} |
| 974 |
|
| 975 |
DISAS_INSN(bitop_im) |
| 976 |
{
|
| 977 |
int opsize;
|
| 978 |
int op;
|
| 979 |
int src1;
|
| 980 |
uint32_t mask; |
| 981 |
int bitnum;
|
| 982 |
int tmp;
|
| 983 |
int addr;
|
| 984 |
int dest;
|
| 985 |
|
| 986 |
if ((insn & 0x38) != 0) |
| 987 |
opsize = OS_BYTE; |
| 988 |
else
|
| 989 |
opsize = OS_LONG; |
| 990 |
op = (insn >> 6) & 3; |
| 991 |
|
| 992 |
bitnum = lduw_code(s->pc); |
| 993 |
s->pc += 2;
|
| 994 |
if (bitnum & 0xff00) { |
| 995 |
disas_undef(s, insn); |
| 996 |
return;
|
| 997 |
} |
| 998 |
|
| 999 |
src1 = gen_ea(s, insn, opsize, 0, op ? &addr: NULL); |
| 1000 |
|
| 1001 |
gen_flush_flags(s); |
| 1002 |
tmp = gen_new_qreg(QMODE_I32); |
| 1003 |
if (opsize == OS_BYTE)
|
| 1004 |
bitnum &= 7;
|
| 1005 |
else
|
| 1006 |
bitnum &= 31;
|
| 1007 |
mask = 1 << bitnum;
|
| 1008 |
|
| 1009 |
gen_op_btest(src1, gen_im32(mask)); |
| 1010 |
if (op)
|
| 1011 |
dest = gen_new_qreg(QMODE_I32); |
| 1012 |
else
|
| 1013 |
dest = -1;
|
| 1014 |
|
| 1015 |
switch (op) {
|
| 1016 |
case 1: /* bchg */ |
| 1017 |
gen_op_xor32(dest, src1, gen_im32(mask)); |
| 1018 |
break;
|
| 1019 |
case 2: /* bclr */ |
| 1020 |
gen_op_and32(dest, src1, gen_im32(~mask)); |
| 1021 |
break;
|
| 1022 |
case 3: /* bset */ |
| 1023 |
gen_op_or32(dest, src1, gen_im32(mask)); |
| 1024 |
break;
|
| 1025 |
default: /* btst */ |
| 1026 |
break;
|
| 1027 |
} |
| 1028 |
if (op)
|
| 1029 |
gen_ea(s, insn, opsize, dest, &addr); |
| 1030 |
} |
| 1031 |
|
| 1032 |
DISAS_INSN(arith_im) |
| 1033 |
{
|
| 1034 |
int op;
|
| 1035 |
int src1;
|
| 1036 |
int dest;
|
| 1037 |
int src2;
|
| 1038 |
int addr;
|
| 1039 |
|
| 1040 |
op = (insn >> 9) & 7; |
| 1041 |
src1 = gen_ea(s, insn, OS_LONG, 0, (op == 6) ? NULL : &addr); |
| 1042 |
src2 = gen_im32(read_im32(s)); |
| 1043 |
dest = gen_new_qreg(QMODE_I32); |
| 1044 |
switch (op) {
|
| 1045 |
case 0: /* ori */ |
| 1046 |
gen_op_or32(dest, src1, src2); |
| 1047 |
gen_logic_cc(s, dest); |
| 1048 |
break;
|
| 1049 |
case 1: /* andi */ |
| 1050 |
gen_op_and32(dest, src1, src2); |
| 1051 |
gen_logic_cc(s, dest); |
| 1052 |
break;
|
| 1053 |
case 2: /* subi */ |
| 1054 |
gen_op_mov32(dest, src1); |
| 1055 |
gen_op_update_xflag_lt(dest, src2); |
| 1056 |
gen_op_sub32(dest, dest, src2); |
| 1057 |
gen_op_update_cc_add(dest, src2); |
| 1058 |
s->cc_op = CC_OP_SUB; |
| 1059 |
break;
|
| 1060 |
case 3: /* addi */ |
| 1061 |
gen_op_mov32(dest, src1); |
| 1062 |
gen_op_add32(dest, dest, src2); |
| 1063 |
gen_op_update_cc_add(dest, src2); |
| 1064 |
gen_op_update_xflag_lt(dest, src2); |
| 1065 |
s->cc_op = CC_OP_ADD; |
| 1066 |
break;
|
| 1067 |
case 5: /* eori */ |
| 1068 |
gen_op_xor32(dest, src1, src2); |
| 1069 |
gen_logic_cc(s, dest); |
| 1070 |
break;
|
| 1071 |
case 6: /* cmpi */ |
| 1072 |
gen_op_mov32(dest, src1); |
| 1073 |
gen_op_sub32(dest, dest, src2); |
| 1074 |
gen_op_update_cc_add(dest, src2); |
| 1075 |
s->cc_op = CC_OP_SUB; |
| 1076 |
break;
|
| 1077 |
default:
|
| 1078 |
abort(); |
| 1079 |
} |
| 1080 |
if (op != 6) { |
| 1081 |
gen_ea(s, insn, OS_LONG, dest, &addr); |
| 1082 |
} |
| 1083 |
} |
| 1084 |
|
| 1085 |
DISAS_INSN(byterev) |
| 1086 |
{
|
| 1087 |
int reg;
|
| 1088 |
|
| 1089 |
reg = DREG(insn, 0);
|
| 1090 |
gen_op_bswap32(reg, reg); |
| 1091 |
} |
| 1092 |
|
| 1093 |
DISAS_INSN(move) |
| 1094 |
{
|
| 1095 |
int src;
|
| 1096 |
int dest;
|
| 1097 |
int op;
|
| 1098 |
int opsize;
|
| 1099 |
|
| 1100 |
switch (insn >> 12) { |
| 1101 |
case 1: /* move.b */ |
| 1102 |
opsize = OS_BYTE; |
| 1103 |
break;
|
| 1104 |
case 2: /* move.l */ |
| 1105 |
opsize = OS_LONG; |
| 1106 |
break;
|
| 1107 |
case 3: /* move.w */ |
| 1108 |
opsize = OS_WORD; |
| 1109 |
break;
|
| 1110 |
default:
|
| 1111 |
abort(); |
| 1112 |
} |
| 1113 |
src = gen_ea(s, insn, opsize, -1, NULL); |
| 1114 |
op = (insn >> 6) & 7; |
| 1115 |
if (op == 1) { |
| 1116 |
/* movea */
|
| 1117 |
/* The value will already have been sign extended. */
|
| 1118 |
dest = AREG(insn, 9);
|
| 1119 |
gen_op_mov32(dest, src); |
| 1120 |
} else {
|
| 1121 |
/* normal move */
|
| 1122 |
uint16_t dest_ea; |
| 1123 |
dest_ea = ((insn >> 9) & 7) | (op << 3); |
| 1124 |
gen_ea(s, dest_ea, opsize, src, NULL);
|
| 1125 |
/* This will be correct because loads sign extend. */
|
| 1126 |
gen_logic_cc(s, src); |
| 1127 |
} |
| 1128 |
} |
| 1129 |
|
| 1130 |
DISAS_INSN(negx) |
| 1131 |
{
|
| 1132 |
int reg;
|
| 1133 |
int dest;
|
| 1134 |
int tmp;
|
| 1135 |
|
| 1136 |
gen_flush_flags(s); |
| 1137 |
reg = DREG(insn, 0);
|
| 1138 |
dest = gen_new_qreg(QMODE_I32); |
| 1139 |
gen_op_mov32 (dest, gen_im32(0));
|
| 1140 |
gen_op_subx_cc(dest, reg); |
| 1141 |
/* !Z is sticky. */
|
| 1142 |
tmp = gen_new_qreg(QMODE_I32); |
| 1143 |
gen_op_mov32 (tmp, QREG_CC_DEST); |
| 1144 |
gen_op_update_cc_add(dest, reg); |
| 1145 |
gen_op_mov32(reg, dest); |
| 1146 |
s->cc_op = CC_OP_DYNAMIC; |
| 1147 |
gen_flush_flags(s); |
| 1148 |
gen_op_or32(tmp, tmp, gen_im32(~CCF_Z)); |
| 1149 |
gen_op_and32(QREG_CC_DEST, QREG_CC_DEST, tmp); |
| 1150 |
s->cc_op = CC_OP_FLAGS; |
| 1151 |
} |
| 1152 |
|
| 1153 |
DISAS_INSN(lea) |
| 1154 |
{
|
| 1155 |
int reg;
|
| 1156 |
int tmp;
|
| 1157 |
|
| 1158 |
reg = AREG(insn, 9);
|
| 1159 |
tmp = gen_lea(s, insn, OS_LONG); |
| 1160 |
gen_op_mov32(reg, tmp); |
| 1161 |
} |
| 1162 |
|
| 1163 |
DISAS_INSN(clr) |
| 1164 |
{
|
| 1165 |
int opsize;
|
| 1166 |
|
| 1167 |
switch ((insn >> 6) & 3) { |
| 1168 |
case 0: /* clr.b */ |
| 1169 |
opsize = OS_BYTE; |
| 1170 |
break;
|
| 1171 |
case 1: /* clr.w */ |
| 1172 |
opsize = OS_WORD; |
| 1173 |
break;
|
| 1174 |
case 2: /* clr.l */ |
| 1175 |
opsize = OS_LONG; |
| 1176 |
break;
|
| 1177 |
default:
|
| 1178 |
abort(); |
| 1179 |
} |
| 1180 |
gen_ea (s, insn, opsize, gen_im32(0), NULL); |
| 1181 |
gen_logic_cc(s, gen_im32(0));
|
| 1182 |
} |
| 1183 |
|
| 1184 |
static int gen_get_ccr(DisasContext *s) |
| 1185 |
{
|
| 1186 |
int dest;
|
| 1187 |
|
| 1188 |
gen_flush_flags(s); |
| 1189 |
dest = gen_new_qreg(QMODE_I32); |
| 1190 |
gen_op_get_xflag(dest); |
| 1191 |
gen_op_shl32(dest, dest, gen_im32(4));
|
| 1192 |
gen_op_or32(dest, dest, QREG_CC_DEST); |
| 1193 |
return dest;
|
| 1194 |
} |
| 1195 |
|
| 1196 |
DISAS_INSN(move_from_ccr) |
| 1197 |
{
|
| 1198 |
int reg;
|
| 1199 |
int ccr;
|
| 1200 |
|
| 1201 |
ccr = gen_get_ccr(s); |
| 1202 |
reg = DREG(insn, 0);
|
| 1203 |
gen_partset_reg(OS_WORD, reg, ccr); |
| 1204 |
} |
| 1205 |
|
| 1206 |
DISAS_INSN(neg) |
| 1207 |
{
|
| 1208 |
int reg;
|
| 1209 |
int src1;
|
| 1210 |
|
| 1211 |
reg = DREG(insn, 0);
|
| 1212 |
src1 = gen_new_qreg(QMODE_I32); |
| 1213 |
gen_op_mov32(src1, reg); |
| 1214 |
gen_op_neg32(reg, src1); |
| 1215 |
s->cc_op = CC_OP_SUB; |
| 1216 |
gen_op_update_cc_add(reg, src1); |
| 1217 |
gen_op_update_xflag_lt(gen_im32(0), src1);
|
| 1218 |
s->cc_op = CC_OP_SUB; |
| 1219 |
} |
| 1220 |
|
| 1221 |
static void gen_set_sr_im(DisasContext *s, uint16_t val, int ccr_only) |
| 1222 |
{
|
| 1223 |
gen_op_logic_cc(gen_im32(val & 0xf));
|
| 1224 |
gen_op_update_xflag_tst(gen_im32((val & 0x10) >> 4)); |
| 1225 |
if (!ccr_only) {
|
| 1226 |
gen_op_mov32(QREG_SR, gen_im32(val & 0xff00));
|
| 1227 |
} |
| 1228 |
} |
| 1229 |
|
| 1230 |
static void gen_set_sr(DisasContext *s, uint16_t insn, int ccr_only) |
| 1231 |
{
|
| 1232 |
int src1;
|
| 1233 |
int reg;
|
| 1234 |
|
| 1235 |
s->cc_op = CC_OP_FLAGS; |
| 1236 |
if ((insn & 0x38) == 0) |
| 1237 |
{
|
| 1238 |
src1 = gen_new_qreg(QMODE_I32); |
| 1239 |
reg = DREG(insn, 0);
|
| 1240 |
gen_op_and32(src1, reg, gen_im32(0xf));
|
| 1241 |
gen_op_logic_cc(src1); |
| 1242 |
gen_op_shr32(src1, reg, gen_im32(4));
|
| 1243 |
gen_op_and32(src1, src1, gen_im32(1));
|
| 1244 |
gen_op_update_xflag_tst(src1); |
| 1245 |
if (!ccr_only) {
|
| 1246 |
gen_op_and32(QREG_SR, reg, gen_im32(0xff00));
|
| 1247 |
} |
| 1248 |
} |
| 1249 |
else if ((insn & 0x3f) == 0x3c) |
| 1250 |
{
|
| 1251 |
uint16_t val; |
| 1252 |
val = lduw_code(s->pc); |
| 1253 |
s->pc += 2;
|
| 1254 |
gen_set_sr_im(s, val, ccr_only); |
| 1255 |
} |
| 1256 |
else
|
| 1257 |
disas_undef(s, insn); |
| 1258 |
} |
| 1259 |
|
| 1260 |
DISAS_INSN(move_to_ccr) |
| 1261 |
{
|
| 1262 |
gen_set_sr(s, insn, 1);
|
| 1263 |
} |
| 1264 |
|
| 1265 |
DISAS_INSN(not) |
| 1266 |
{
|
| 1267 |
int reg;
|
| 1268 |
|
| 1269 |
reg = DREG(insn, 0);
|
| 1270 |
gen_op_not32(reg, reg); |
| 1271 |
gen_logic_cc(s, reg); |
| 1272 |
} |
| 1273 |
|
| 1274 |
DISAS_INSN(swap) |
| 1275 |
{
|
| 1276 |
int dest;
|
| 1277 |
int src1;
|
| 1278 |
int src2;
|
| 1279 |
int reg;
|
| 1280 |
|
| 1281 |
dest = gen_new_qreg(QMODE_I32); |
| 1282 |
src1 = gen_new_qreg(QMODE_I32); |
| 1283 |
src2 = gen_new_qreg(QMODE_I32); |
| 1284 |
reg = DREG(insn, 0);
|
| 1285 |
gen_op_shl32(src1, reg, gen_im32(16));
|
| 1286 |
gen_op_shr32(src2, reg, gen_im32(16));
|
| 1287 |
gen_op_or32(dest, src1, src2); |
| 1288 |
gen_op_mov32(reg, dest); |
| 1289 |
gen_logic_cc(s, dest); |
| 1290 |
} |
| 1291 |
|
| 1292 |
DISAS_INSN(pea) |
| 1293 |
{
|
| 1294 |
int tmp;
|
| 1295 |
|
| 1296 |
tmp = gen_lea(s, insn, OS_LONG); |
| 1297 |
gen_push(s, tmp); |
| 1298 |
} |
| 1299 |
|
| 1300 |
DISAS_INSN(ext) |
| 1301 |
{
|
| 1302 |
int reg;
|
| 1303 |
int op;
|
| 1304 |
int tmp;
|
| 1305 |
|
| 1306 |
reg = DREG(insn, 0);
|
| 1307 |
op = (insn >> 6) & 7; |
| 1308 |
tmp = gen_new_qreg(QMODE_I32); |
| 1309 |
if (op == 3) |
| 1310 |
gen_op_ext16s32(tmp, reg); |
| 1311 |
else
|
| 1312 |
gen_op_ext8s32(tmp, reg); |
| 1313 |
if (op == 2) |
| 1314 |
gen_partset_reg(OS_WORD, reg, tmp); |
| 1315 |
else
|
| 1316 |
gen_op_mov32(reg, tmp); |
| 1317 |
gen_logic_cc(s, tmp); |
| 1318 |
} |
| 1319 |
|
| 1320 |
DISAS_INSN(tst) |
| 1321 |
{
|
| 1322 |
int opsize;
|
| 1323 |
int tmp;
|
| 1324 |
|
| 1325 |
switch ((insn >> 6) & 3) { |
| 1326 |
case 0: /* tst.b */ |
| 1327 |
opsize = OS_BYTE; |
| 1328 |
break;
|
| 1329 |
case 1: /* tst.w */ |
| 1330 |
opsize = OS_WORD; |
| 1331 |
break;
|
| 1332 |
case 2: /* tst.l */ |
| 1333 |
opsize = OS_LONG; |
| 1334 |
break;
|
| 1335 |
default:
|
| 1336 |
abort(); |
| 1337 |
} |
| 1338 |
tmp = gen_ea(s, insn, opsize, -1, NULL); |
| 1339 |
gen_logic_cc(s, tmp); |
| 1340 |
} |
| 1341 |
|
| 1342 |
DISAS_INSN(pulse) |
| 1343 |
{
|
| 1344 |
/* Implemented as a NOP. */
|
| 1345 |
} |
| 1346 |
|
| 1347 |
DISAS_INSN(illegal) |
| 1348 |
{
|
| 1349 |
gen_exception(s, s->pc - 2, EXCP_ILLEGAL);
|
| 1350 |
} |
| 1351 |
|
| 1352 |
/* ??? This should be atomic. */
|
| 1353 |
DISAS_INSN(tas) |
| 1354 |
{
|
| 1355 |
int dest;
|
| 1356 |
int src1;
|
| 1357 |
int addr;
|
| 1358 |
|
| 1359 |
dest = gen_new_qreg(QMODE_I32); |
| 1360 |
src1 = gen_ea(s, insn, OS_BYTE, -1, &addr);
|
| 1361 |
gen_logic_cc(s, src1); |
| 1362 |
gen_op_or32(dest, src1, gen_im32(0x80));
|
| 1363 |
gen_ea(s, insn, OS_BYTE, dest, &addr); |
| 1364 |
} |
| 1365 |
|
| 1366 |
DISAS_INSN(mull) |
| 1367 |
{
|
| 1368 |
uint16_t ext; |
| 1369 |
int reg;
|
| 1370 |
int src1;
|
| 1371 |
int dest;
|
| 1372 |
|
| 1373 |
/* The upper 32 bits of the product are discarded, so
|
| 1374 |
muls.l and mulu.l are functionally equivalent. */
|
| 1375 |
ext = lduw_code(s->pc); |
| 1376 |
s->pc += 2;
|
| 1377 |
if (ext & 0x87ff) { |
| 1378 |
gen_exception(s, s->pc - 4, EXCP_UNSUPPORTED);
|
| 1379 |
return;
|
| 1380 |
} |
| 1381 |
reg = DREG(ext, 12);
|
| 1382 |
src1 = gen_ea(s, insn, OS_LONG, 0, NULL); |
| 1383 |
dest = gen_new_qreg(QMODE_I32); |
| 1384 |
gen_op_mul32(dest, src1, reg); |
| 1385 |
gen_op_mov32(reg, dest); |
| 1386 |
/* Unlike m68k, coldfire always clears the overflow bit. */
|
| 1387 |
gen_logic_cc(s, dest); |
| 1388 |
} |
| 1389 |
|
| 1390 |
DISAS_INSN(link) |
| 1391 |
{
|
| 1392 |
int16_t offset; |
| 1393 |
int reg;
|
| 1394 |
int tmp;
|
| 1395 |
|
| 1396 |
offset = ldsw_code(s->pc); |
| 1397 |
s->pc += 2;
|
| 1398 |
reg = AREG(insn, 0);
|
| 1399 |
tmp = gen_new_qreg(QMODE_I32); |
| 1400 |
gen_op_sub32(tmp, QREG_SP, gen_im32(4));
|
| 1401 |
gen_store(s, OS_LONG, tmp, reg); |
| 1402 |
if (reg != QREG_SP)
|
| 1403 |
gen_op_mov32(reg, tmp); |
| 1404 |
gen_op_add32(QREG_SP, tmp, gen_im32(offset)); |
| 1405 |
} |
| 1406 |
|
| 1407 |
DISAS_INSN(unlk) |
| 1408 |
{
|
| 1409 |
int src;
|
| 1410 |
int reg;
|
| 1411 |
int tmp;
|
| 1412 |
|
| 1413 |
src = gen_new_qreg(QMODE_I32); |
| 1414 |
reg = AREG(insn, 0);
|
| 1415 |
gen_op_mov32(src, reg); |
| 1416 |
tmp = gen_load(s, OS_LONG, src, 0);
|
| 1417 |
gen_op_mov32(reg, tmp); |
| 1418 |
gen_op_add32(QREG_SP, src, gen_im32(4));
|
| 1419 |
} |
| 1420 |
|
| 1421 |
DISAS_INSN(nop) |
| 1422 |
{
|
| 1423 |
} |
| 1424 |
|
| 1425 |
DISAS_INSN(rts) |
| 1426 |
{
|
| 1427 |
int tmp;
|
| 1428 |
|
| 1429 |
tmp = gen_load(s, OS_LONG, QREG_SP, 0);
|
| 1430 |
gen_op_add32(QREG_SP, QREG_SP, gen_im32(4));
|
| 1431 |
gen_jmp(s, tmp); |
| 1432 |
} |
| 1433 |
|
| 1434 |
DISAS_INSN(jump) |
| 1435 |
{
|
| 1436 |
int tmp;
|
| 1437 |
|
| 1438 |
/* Load the target address first to ensure correct exception
|
| 1439 |
behavior. */
|
| 1440 |
tmp = gen_lea(s, insn, OS_LONG); |
| 1441 |
if ((insn & 0x40) == 0) { |
| 1442 |
/* jsr */
|
| 1443 |
gen_push(s, gen_im32(s->pc)); |
| 1444 |
} |
| 1445 |
gen_jmp(s, tmp); |
| 1446 |
} |
| 1447 |
|
| 1448 |
DISAS_INSN(addsubq) |
| 1449 |
{
|
| 1450 |
int src1;
|
| 1451 |
int src2;
|
| 1452 |
int dest;
|
| 1453 |
int val;
|
| 1454 |
int addr;
|
| 1455 |
|
| 1456 |
src1 = gen_ea(s, insn, OS_LONG, 0, &addr);
|
| 1457 |
val = (insn >> 9) & 7; |
| 1458 |
if (val == 0) |
| 1459 |
val = 8;
|
| 1460 |
src2 = gen_im32(val); |
| 1461 |
dest = gen_new_qreg(QMODE_I32); |
| 1462 |
gen_op_mov32(dest, src1); |
| 1463 |
if ((insn & 0x38) == 0x08) { |
| 1464 |
/* Don't update condition codes if the destination is an
|
| 1465 |
address register. */
|
| 1466 |
if (insn & 0x0100) { |
| 1467 |
gen_op_sub32(dest, dest, src2); |
| 1468 |
} else {
|
| 1469 |
gen_op_add32(dest, dest, src2); |
| 1470 |
} |
| 1471 |
} else {
|
| 1472 |
if (insn & 0x0100) { |
| 1473 |
gen_op_update_xflag_lt(dest, src2); |
| 1474 |
gen_op_sub32(dest, dest, src2); |
| 1475 |
s->cc_op = CC_OP_SUB; |
| 1476 |
} else {
|
| 1477 |
gen_op_add32(dest, dest, src2); |
| 1478 |
gen_op_update_xflag_lt(dest, src2); |
| 1479 |
s->cc_op = CC_OP_ADD; |
| 1480 |
} |
| 1481 |
gen_op_update_cc_add(dest, src2); |
| 1482 |
} |
| 1483 |
gen_ea(s, insn, OS_LONG, dest, &addr); |
| 1484 |
} |
| 1485 |
|
| 1486 |
DISAS_INSN(tpf) |
| 1487 |
{
|
| 1488 |
switch (insn & 7) { |
| 1489 |
case 2: /* One extension word. */ |
| 1490 |
s->pc += 2;
|
| 1491 |
break;
|
| 1492 |
case 3: /* Two extension words. */ |
| 1493 |
s->pc += 4;
|
| 1494 |
break;
|
| 1495 |
case 4: /* No extension words. */ |
| 1496 |
break;
|
| 1497 |
default:
|
| 1498 |
disas_undef(s, insn); |
| 1499 |
} |
| 1500 |
} |
| 1501 |
|
| 1502 |
DISAS_INSN(branch) |
| 1503 |
{
|
| 1504 |
int32_t offset; |
| 1505 |
uint32_t base; |
| 1506 |
int op;
|
| 1507 |
int l1;
|
| 1508 |
|
| 1509 |
base = s->pc; |
| 1510 |
op = (insn >> 8) & 0xf; |
| 1511 |
offset = (int8_t)insn; |
| 1512 |
if (offset == 0) { |
| 1513 |
offset = ldsw_code(s->pc); |
| 1514 |
s->pc += 2;
|
| 1515 |
} else if (offset == -1) { |
| 1516 |
offset = read_im32(s); |
| 1517 |
} |
| 1518 |
if (op == 1) { |
| 1519 |
/* bsr */
|
| 1520 |
gen_push(s, gen_im32(s->pc)); |
| 1521 |
} |
| 1522 |
gen_flush_cc_op(s); |
| 1523 |
if (op > 1) { |
| 1524 |
/* Bcc */
|
| 1525 |
l1 = gen_new_label(); |
| 1526 |
gen_jmpcc(s, ((insn >> 8) & 0xf) ^ 1, l1); |
| 1527 |
gen_jmp_tb(s, 1, base + offset);
|
| 1528 |
gen_set_label(l1); |
| 1529 |
gen_jmp_tb(s, 0, s->pc);
|
| 1530 |
} else {
|
| 1531 |
/* Unconditional branch. */
|
| 1532 |
gen_jmp_tb(s, 0, base + offset);
|
| 1533 |
} |
| 1534 |
} |
| 1535 |
|
| 1536 |
DISAS_INSN(moveq) |
| 1537 |
{
|
| 1538 |
int tmp;
|
| 1539 |
|
| 1540 |
tmp = gen_im32((int8_t)insn); |
| 1541 |
gen_op_mov32(DREG(insn, 9), tmp);
|
| 1542 |
gen_logic_cc(s, tmp); |
| 1543 |
} |
| 1544 |
|
| 1545 |
DISAS_INSN(mvzs) |
| 1546 |
{
|
| 1547 |
int opsize;
|
| 1548 |
int src;
|
| 1549 |
int reg;
|
| 1550 |
|
| 1551 |
if (insn & 0x40) |
| 1552 |
opsize = OS_WORD; |
| 1553 |
else
|
| 1554 |
opsize = OS_BYTE; |
| 1555 |
src = gen_ea(s, insn, opsize, (insn & 0x80) ? 0 : -1, NULL); |
| 1556 |
reg = DREG(insn, 9);
|
| 1557 |
gen_op_mov32(reg, src); |
| 1558 |
gen_logic_cc(s, src); |
| 1559 |
} |
| 1560 |
|
| 1561 |
DISAS_INSN(or) |
| 1562 |
{
|
| 1563 |
int reg;
|
| 1564 |
int dest;
|
| 1565 |
int src;
|
| 1566 |
int addr;
|
| 1567 |
|
| 1568 |
reg = DREG(insn, 9);
|
| 1569 |
dest = gen_new_qreg(QMODE_I32); |
| 1570 |
if (insn & 0x100) { |
| 1571 |
src = gen_ea(s, insn, OS_LONG, 0, &addr);
|
| 1572 |
gen_op_or32(dest, src, reg); |
| 1573 |
gen_ea(s, insn, OS_LONG, dest, &addr); |
| 1574 |
} else {
|
| 1575 |
src = gen_ea(s, insn, OS_LONG, 0, NULL); |
| 1576 |
gen_op_or32(dest, src, reg); |
| 1577 |
gen_op_mov32(reg, dest); |
| 1578 |
} |
| 1579 |
gen_logic_cc(s, dest); |
| 1580 |
} |
| 1581 |
|
| 1582 |
DISAS_INSN(suba) |
| 1583 |
{
|
| 1584 |
int src;
|
| 1585 |
int reg;
|
| 1586 |
|
| 1587 |
src = gen_ea(s, insn, OS_LONG, 0, NULL); |
| 1588 |
reg = AREG(insn, 9);
|
| 1589 |
gen_op_sub32(reg, reg, src); |
| 1590 |
} |
| 1591 |
|
| 1592 |
DISAS_INSN(subx) |
| 1593 |
{
|
| 1594 |
int reg;
|
| 1595 |
int src;
|
| 1596 |
int dest;
|
| 1597 |
int tmp;
|
| 1598 |
|
| 1599 |
gen_flush_flags(s); |
| 1600 |
reg = DREG(insn, 9);
|
| 1601 |
src = DREG(insn, 0);
|
| 1602 |
dest = gen_new_qreg(QMODE_I32); |
| 1603 |
gen_op_mov32 (dest, reg); |
| 1604 |
gen_op_subx_cc(dest, src); |
| 1605 |
/* !Z is sticky. */
|
| 1606 |
tmp = gen_new_qreg(QMODE_I32); |
| 1607 |
gen_op_mov32 (tmp, QREG_CC_DEST); |
| 1608 |
gen_op_update_cc_add(dest, src); |
| 1609 |
gen_op_mov32(reg, dest); |
| 1610 |
s->cc_op = CC_OP_DYNAMIC; |
| 1611 |
gen_flush_flags(s); |
| 1612 |
gen_op_or32(tmp, tmp, gen_im32(~CCF_Z)); |
| 1613 |
gen_op_and32(QREG_CC_DEST, QREG_CC_DEST, tmp); |
| 1614 |
s->cc_op = CC_OP_FLAGS; |
| 1615 |
} |
| 1616 |
|
| 1617 |
DISAS_INSN(mov3q) |
| 1618 |
{
|
| 1619 |
int src;
|
| 1620 |
int val;
|
| 1621 |
|
| 1622 |
val = (insn >> 9) & 7; |
| 1623 |
if (val == 0) |
| 1624 |
val = -1;
|
| 1625 |
src = gen_im32(val); |
| 1626 |
gen_logic_cc(s, src); |
| 1627 |
gen_ea(s, insn, OS_LONG, src, NULL);
|
| 1628 |
} |
| 1629 |
|
| 1630 |
DISAS_INSN(cmp) |
| 1631 |
{
|
| 1632 |
int op;
|
| 1633 |
int src;
|
| 1634 |
int reg;
|
| 1635 |
int dest;
|
| 1636 |
int opsize;
|
| 1637 |
|
| 1638 |
op = (insn >> 6) & 3; |
| 1639 |
switch (op) {
|
| 1640 |
case 0: /* cmp.b */ |
| 1641 |
opsize = OS_BYTE; |
| 1642 |
s->cc_op = CC_OP_CMPB; |
| 1643 |
break;
|
| 1644 |
case 1: /* cmp.w */ |
| 1645 |
opsize = OS_WORD; |
| 1646 |
s->cc_op = CC_OP_CMPW; |
| 1647 |
break;
|
| 1648 |
case 2: /* cmp.l */ |
| 1649 |
opsize = OS_LONG; |
| 1650 |
s->cc_op = CC_OP_SUB; |
| 1651 |
break;
|
| 1652 |
default:
|
| 1653 |
abort(); |
| 1654 |
} |
| 1655 |
src = gen_ea(s, insn, opsize, -1, NULL); |
| 1656 |
reg = DREG(insn, 9);
|
| 1657 |
dest = gen_new_qreg(QMODE_I32); |
| 1658 |
gen_op_sub32(dest, reg, src); |
| 1659 |
gen_op_update_cc_add(dest, src); |
| 1660 |
} |
| 1661 |
|
| 1662 |
DISAS_INSN(cmpa) |
| 1663 |
{
|
| 1664 |
int opsize;
|
| 1665 |
int src;
|
| 1666 |
int reg;
|
| 1667 |
int dest;
|
| 1668 |
|
| 1669 |
if (insn & 0x100) { |
| 1670 |
opsize = OS_LONG; |
| 1671 |
} else {
|
| 1672 |
opsize = OS_WORD; |
| 1673 |
} |
| 1674 |
src = gen_ea(s, insn, opsize, -1, NULL); |
| 1675 |
reg = AREG(insn, 9);
|
| 1676 |
dest = gen_new_qreg(QMODE_I32); |
| 1677 |
gen_op_sub32(dest, reg, src); |
| 1678 |
gen_op_update_cc_add(dest, src); |
| 1679 |
s->cc_op = CC_OP_SUB; |
| 1680 |
} |
| 1681 |
|
| 1682 |
DISAS_INSN(eor) |
| 1683 |
{
|
| 1684 |
int src;
|
| 1685 |
int reg;
|
| 1686 |
int dest;
|
| 1687 |
int addr;
|
| 1688 |
|
| 1689 |
src = gen_ea(s, insn, OS_LONG, 0, &addr);
|
| 1690 |
reg = DREG(insn, 9);
|
| 1691 |
dest = gen_new_qreg(QMODE_I32); |
| 1692 |
gen_op_xor32(dest, src, reg); |
| 1693 |
gen_logic_cc(s, dest); |
| 1694 |
gen_ea(s, insn, OS_LONG, dest, &addr); |
| 1695 |
} |
| 1696 |
|
| 1697 |
DISAS_INSN(and) |
| 1698 |
{
|
| 1699 |
int src;
|
| 1700 |
int reg;
|
| 1701 |
int dest;
|
| 1702 |
int addr;
|
| 1703 |
|
| 1704 |
reg = DREG(insn, 9);
|
| 1705 |
dest = gen_new_qreg(QMODE_I32); |
| 1706 |
if (insn & 0x100) { |
| 1707 |
src = gen_ea(s, insn, OS_LONG, 0, &addr);
|
| 1708 |
gen_op_and32(dest, src, reg); |
| 1709 |
gen_ea(s, insn, OS_LONG, dest, &addr); |
| 1710 |
} else {
|
| 1711 |
src = gen_ea(s, insn, OS_LONG, 0, NULL); |
| 1712 |
gen_op_and32(dest, src, reg); |
| 1713 |
gen_op_mov32(reg, dest); |
| 1714 |
} |
| 1715 |
gen_logic_cc(s, dest); |
| 1716 |
} |
| 1717 |
|
| 1718 |
DISAS_INSN(adda) |
| 1719 |
{
|
| 1720 |
int src;
|
| 1721 |
int reg;
|
| 1722 |
|
| 1723 |
src = gen_ea(s, insn, OS_LONG, 0, NULL); |
| 1724 |
reg = AREG(insn, 9);
|
| 1725 |
gen_op_add32(reg, reg, src); |
| 1726 |
} |
| 1727 |
|
| 1728 |
DISAS_INSN(addx) |
| 1729 |
{
|
| 1730 |
int reg;
|
| 1731 |
int src;
|
| 1732 |
int dest;
|
| 1733 |
int tmp;
|
| 1734 |
|
| 1735 |
gen_flush_flags(s); |
| 1736 |
reg = DREG(insn, 9);
|
| 1737 |
src = DREG(insn, 0);
|
| 1738 |
dest = gen_new_qreg(QMODE_I32); |
| 1739 |
gen_op_mov32 (dest, reg); |
| 1740 |
gen_op_addx_cc(dest, src); |
| 1741 |
/* !Z is sticky. */
|
| 1742 |
tmp = gen_new_qreg(QMODE_I32); |
| 1743 |
gen_op_mov32 (tmp, QREG_CC_DEST); |
| 1744 |
gen_op_update_cc_add(dest, src); |
| 1745 |
gen_op_mov32(reg, dest); |
| 1746 |
s->cc_op = CC_OP_DYNAMIC; |
| 1747 |
gen_flush_flags(s); |
| 1748 |
gen_op_or32(tmp, tmp, gen_im32(~CCF_Z)); |
| 1749 |
gen_op_and32(QREG_CC_DEST, QREG_CC_DEST, tmp); |
| 1750 |
s->cc_op = CC_OP_FLAGS; |
| 1751 |
} |
| 1752 |
|
| 1753 |
DISAS_INSN(shift_im) |
| 1754 |
{
|
| 1755 |
int reg;
|
| 1756 |
int tmp;
|
| 1757 |
|
| 1758 |
reg = DREG(insn, 0);
|
| 1759 |
tmp = (insn >> 9) & 7; |
| 1760 |
if (tmp == 0) |
| 1761 |
tmp = 8;
|
| 1762 |
if (insn & 0x100) { |
| 1763 |
gen_op_shl_im_cc(reg, tmp); |
| 1764 |
s->cc_op = CC_OP_SHL; |
| 1765 |
} else {
|
| 1766 |
if (insn & 8) { |
| 1767 |
gen_op_shr_im_cc(reg, tmp); |
| 1768 |
s->cc_op = CC_OP_SHR; |
| 1769 |
} else {
|
| 1770 |
gen_op_sar_im_cc(reg, tmp); |
| 1771 |
s->cc_op = CC_OP_SAR; |
| 1772 |
} |
| 1773 |
} |
| 1774 |
} |
| 1775 |
|
| 1776 |
DISAS_INSN(shift_reg) |
| 1777 |
{
|
| 1778 |
int reg;
|
| 1779 |
int src;
|
| 1780 |
int tmp;
|
| 1781 |
|
| 1782 |
reg = DREG(insn, 0);
|
| 1783 |
src = DREG(insn, 9);
|
| 1784 |
tmp = gen_new_qreg(QMODE_I32); |
| 1785 |
gen_op_and32(tmp, src, gen_im32(63));
|
| 1786 |
if (insn & 0x100) { |
| 1787 |
gen_op_shl_cc(reg, tmp); |
| 1788 |
s->cc_op = CC_OP_SHL; |
| 1789 |
} else {
|
| 1790 |
if (insn & 8) { |
| 1791 |
gen_op_shr_cc(reg, tmp); |
| 1792 |
s->cc_op = CC_OP_SHR; |
| 1793 |
} else {
|
| 1794 |
gen_op_sar_cc(reg, tmp); |
| 1795 |
s->cc_op = CC_OP_SAR; |
| 1796 |
} |
| 1797 |
} |
| 1798 |
} |
| 1799 |
|
| 1800 |
DISAS_INSN(ff1) |
| 1801 |
{
|
| 1802 |
cpu_abort(NULL, "Unimplemented insn: ff1"); |
| 1803 |
} |
| 1804 |
|
| 1805 |
static int gen_get_sr(DisasContext *s) |
| 1806 |
{
|
| 1807 |
int ccr;
|
| 1808 |
int sr;
|
| 1809 |
|
| 1810 |
ccr = gen_get_ccr(s); |
| 1811 |
sr = gen_new_qreg(QMODE_I32); |
| 1812 |
gen_op_and32(sr, QREG_SR, gen_im32(0xffe0));
|
| 1813 |
gen_op_or32(sr, sr, ccr); |
| 1814 |
return sr;
|
| 1815 |
} |
| 1816 |
|
| 1817 |
DISAS_INSN(strldsr) |
| 1818 |
{
|
| 1819 |
uint16_t ext; |
| 1820 |
uint32_t addr; |
| 1821 |
|
| 1822 |
addr = s->pc - 2;
|
| 1823 |
ext = lduw_code(s->pc); |
| 1824 |
s->pc += 2;
|
| 1825 |
if (ext != 0x46FC) { |
| 1826 |
gen_exception(s, addr, EXCP_UNSUPPORTED); |
| 1827 |
return;
|
| 1828 |
} |
| 1829 |
ext = lduw_code(s->pc); |
| 1830 |
s->pc += 2;
|
| 1831 |
if (IS_USER(s) || (ext & SR_S) == 0) { |
| 1832 |
gen_exception(s, addr, EXCP_PRIVILEGE); |
| 1833 |
return;
|
| 1834 |
} |
| 1835 |
gen_push(s, gen_get_sr(s)); |
| 1836 |
gen_set_sr_im(s, ext, 0);
|
| 1837 |
} |
| 1838 |
|
| 1839 |
DISAS_INSN(move_from_sr) |
| 1840 |
{
|
| 1841 |
int reg;
|
| 1842 |
int sr;
|
| 1843 |
|
| 1844 |
if (IS_USER(s)) {
|
| 1845 |
gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
|
| 1846 |
return;
|
| 1847 |
} |
| 1848 |
sr = gen_get_sr(s); |
| 1849 |
reg = DREG(insn, 0);
|
| 1850 |
gen_partset_reg(OS_WORD, reg, sr); |
| 1851 |
} |
| 1852 |
|
| 1853 |
DISAS_INSN(move_to_sr) |
| 1854 |
{
|
| 1855 |
if (IS_USER(s)) {
|
| 1856 |
gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
|
| 1857 |
return;
|
| 1858 |
} |
| 1859 |
gen_set_sr(s, insn, 0);
|
| 1860 |
gen_lookup_tb(s); |
| 1861 |
} |
| 1862 |
|
| 1863 |
DISAS_INSN(move_from_usp) |
| 1864 |
{
|
| 1865 |
if (IS_USER(s)) {
|
| 1866 |
gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
|
| 1867 |
return;
|
| 1868 |
} |
| 1869 |
/* TODO: Implement USP. */
|
| 1870 |
gen_exception(s, s->pc - 2, EXCP_ILLEGAL);
|
| 1871 |
} |
| 1872 |
|
| 1873 |
DISAS_INSN(move_to_usp) |
| 1874 |
{
|
| 1875 |
if (IS_USER(s)) {
|
| 1876 |
gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
|
| 1877 |
return;
|
| 1878 |
} |
| 1879 |
/* TODO: Implement USP. */
|
| 1880 |
gen_exception(s, s->pc - 2, EXCP_ILLEGAL);
|
| 1881 |
} |
| 1882 |
|
| 1883 |
DISAS_INSN(halt) |
| 1884 |
{
|
| 1885 |
gen_jmp(s, gen_im32(s->pc)); |
| 1886 |
gen_op_halt(); |
| 1887 |
} |
| 1888 |
|
| 1889 |
DISAS_INSN(stop) |
| 1890 |
{
|
| 1891 |
uint16_t ext; |
| 1892 |
|
| 1893 |
if (IS_USER(s)) {
|
| 1894 |
gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
|
| 1895 |
return;
|
| 1896 |
} |
| 1897 |
|
| 1898 |
ext = lduw_code(s->pc); |
| 1899 |
s->pc += 2;
|
| 1900 |
|
| 1901 |
gen_set_sr_im(s, ext, 0);
|
| 1902 |
gen_jmp(s, gen_im32(s->pc)); |
| 1903 |
gen_op_stop(); |
| 1904 |
} |
| 1905 |
|
| 1906 |
DISAS_INSN(rte) |
| 1907 |
{
|
| 1908 |
if (IS_USER(s)) {
|
| 1909 |
gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
|
| 1910 |
return;
|
| 1911 |
} |
| 1912 |
gen_exception(s, s->pc - 2, EXCP_RTE);
|
| 1913 |
} |
| 1914 |
|
| 1915 |
DISAS_INSN(movec) |
| 1916 |
{
|
| 1917 |
uint16_t ext; |
| 1918 |
int reg;
|
| 1919 |
|
| 1920 |
if (IS_USER(s)) {
|
| 1921 |
gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
|
| 1922 |
return;
|
| 1923 |
} |
| 1924 |
|
| 1925 |
ext = lduw_code(s->pc); |
| 1926 |
s->pc += 2;
|
| 1927 |
|
| 1928 |
if (ext & 0x8000) { |
| 1929 |
reg = AREG(ext, 12);
|
| 1930 |
} else {
|
| 1931 |
reg = DREG(ext, 12);
|
| 1932 |
} |
| 1933 |
gen_op_movec(gen_im32(ext & 0xfff), reg);
|
| 1934 |
gen_lookup_tb(s); |
| 1935 |
} |
| 1936 |
|
| 1937 |
DISAS_INSN(intouch) |
| 1938 |
{
|
| 1939 |
if (IS_USER(s)) {
|
| 1940 |
gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
|
| 1941 |
return;
|
| 1942 |
} |
| 1943 |
/* ICache fetch. Implement as no-op. */
|
| 1944 |
} |
| 1945 |
|
| 1946 |
DISAS_INSN(cpushl) |
| 1947 |
{
|
| 1948 |
if (IS_USER(s)) {
|
| 1949 |
gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
|
| 1950 |
return;
|
| 1951 |
} |
| 1952 |
/* Cache push/invalidate. Implement as no-op. */
|
| 1953 |
} |
| 1954 |
|
| 1955 |
DISAS_INSN(wddata) |
| 1956 |
{
|
| 1957 |
gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
|
| 1958 |
} |
| 1959 |
|
| 1960 |
DISAS_INSN(wdebug) |
| 1961 |
{
|
| 1962 |
if (IS_USER(s)) {
|
| 1963 |
gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
|
| 1964 |
return;
|
| 1965 |
} |
| 1966 |
/* TODO: Implement wdebug. */
|
| 1967 |
qemu_assert(0, "WDEBUG not implemented"); |
| 1968 |
} |
| 1969 |
|
| 1970 |
DISAS_INSN(trap) |
| 1971 |
{
|
| 1972 |
gen_exception(s, s->pc - 2, EXCP_TRAP0 + (insn & 0xf)); |
| 1973 |
} |
| 1974 |
|
| 1975 |
/* ??? FP exceptions are not implemented. Most exceptions are deferred until
|
| 1976 |
immediately before the next FP instruction is executed. */
|
| 1977 |
DISAS_INSN(fpu) |
| 1978 |
{
|
| 1979 |
uint16_t ext; |
| 1980 |
int opmode;
|
| 1981 |
int src;
|
| 1982 |
int dest;
|
| 1983 |
int res;
|
| 1984 |
int round;
|
| 1985 |
int opsize;
|
| 1986 |
|
| 1987 |
ext = lduw_code(s->pc); |
| 1988 |
s->pc += 2;
|
| 1989 |
opmode = ext & 0x7f;
|
| 1990 |
switch ((ext >> 13) & 7) { |
| 1991 |
case 0: case 2: |
| 1992 |
break;
|
| 1993 |
case 1: |
| 1994 |
goto undef;
|
| 1995 |
case 3: /* fmove out */ |
| 1996 |
src = FREG(ext, 7);
|
| 1997 |
/* fmove */
|
| 1998 |
/* ??? TODO: Proper behavior on overflow. */
|
| 1999 |
switch ((ext >> 10) & 7) { |
| 2000 |
case 0: |
| 2001 |
opsize = OS_LONG; |
| 2002 |
res = gen_new_qreg(QMODE_I32); |
| 2003 |
gen_op_f64_to_i32(res, src); |
| 2004 |
break;
|
| 2005 |
case 1: |
| 2006 |
opsize = OS_SINGLE; |
| 2007 |
res = gen_new_qreg(QMODE_F32); |
| 2008 |
gen_op_f64_to_f32(res, src); |
| 2009 |
break;
|
| 2010 |
case 4: |
| 2011 |
opsize = OS_WORD; |
| 2012 |
res = gen_new_qreg(QMODE_I32); |
| 2013 |
gen_op_f64_to_i32(res, src); |
| 2014 |
break;
|
| 2015 |
case 5: |
| 2016 |
opsize = OS_DOUBLE; |
| 2017 |
res = src; |
| 2018 |
break;
|
| 2019 |
case 6: |
| 2020 |
opsize = OS_BYTE; |
| 2021 |
res = gen_new_qreg(QMODE_I32); |
| 2022 |
gen_op_f64_to_i32(res, src); |
| 2023 |
break;
|
| 2024 |
default:
|
| 2025 |
goto undef;
|
| 2026 |
} |
| 2027 |
gen_ea(s, insn, opsize, res, NULL);
|
| 2028 |
return;
|
| 2029 |
case 4: /* fmove to control register. */ |
| 2030 |
switch ((ext >> 10) & 7) { |
| 2031 |
case 4: /* FPCR */ |
| 2032 |
/* Not implemented. Ignore writes. */
|
| 2033 |
break;
|
| 2034 |
case 1: /* FPIAR */ |
| 2035 |
case 2: /* FPSR */ |
| 2036 |
default:
|
| 2037 |
cpu_abort(NULL, "Unimplemented: fmove to control %d", |
| 2038 |
(ext >> 10) & 7); |
| 2039 |
} |
| 2040 |
break;
|
| 2041 |
case 5: /* fmove from control register. */ |
| 2042 |
switch ((ext >> 10) & 7) { |
| 2043 |
case 4: /* FPCR */ |
| 2044 |
/* Not implemented. Always return zero. */
|
| 2045 |
res = gen_im32(0);
|
| 2046 |
break;
|
| 2047 |
case 1: /* FPIAR */ |
| 2048 |
case 2: /* FPSR */ |
| 2049 |
default:
|
| 2050 |
cpu_abort(NULL, "Unimplemented: fmove from control %d", |
| 2051 |
(ext >> 10) & 7); |
| 2052 |
goto undef;
|
| 2053 |
} |
| 2054 |
gen_ea(s, insn, OS_LONG, res, NULL);
|
| 2055 |
break;
|
| 2056 |
case 6: /* fmovem */ |
| 2057 |
case 7: |
| 2058 |
{
|
| 2059 |
int addr;
|
| 2060 |
uint16_t mask; |
| 2061 |
if ((ext & 0x1f00) != 0x1000 || (ext & 0xff) == 0) |
| 2062 |
goto undef;
|
| 2063 |
src = gen_lea(s, insn, OS_LONG); |
| 2064 |
addr = gen_new_qreg(QMODE_I32); |
| 2065 |
gen_op_mov32(addr, src); |
| 2066 |
mask = 0x80;
|
| 2067 |
dest = QREG_F0; |
| 2068 |
while (mask) {
|
| 2069 |
if (ext & mask) {
|
| 2070 |
if (ext & (1 << 13)) { |
| 2071 |
/* store */
|
| 2072 |
gen_st(s, f64, addr, dest); |
| 2073 |
} else {
|
| 2074 |
/* load */
|
| 2075 |
gen_ld(s, f64, dest, addr); |
| 2076 |
} |
| 2077 |
if (ext & (mask - 1)) |
| 2078 |
gen_op_add32(addr, addr, gen_im32(8));
|
| 2079 |
} |
| 2080 |
mask >>= 1;
|
| 2081 |
dest++; |
| 2082 |
} |
| 2083 |
} |
| 2084 |
return;
|
| 2085 |
} |
| 2086 |
if (ext & (1 << 14)) { |
| 2087 |
int tmp;
|
| 2088 |
|
| 2089 |
/* Source effective address. */
|
| 2090 |
switch ((ext >> 10) & 7) { |
| 2091 |
case 0: opsize = OS_LONG; break; |
| 2092 |
case 1: opsize = OS_SINGLE; break; |
| 2093 |
case 4: opsize = OS_WORD; break; |
| 2094 |
case 5: opsize = OS_DOUBLE; break; |
| 2095 |
case 6: opsize = OS_BYTE; break; |
| 2096 |
default:
|
| 2097 |
goto undef;
|
| 2098 |
} |
| 2099 |
tmp = gen_ea(s, insn, opsize, -1, NULL); |
| 2100 |
if (opsize == OS_DOUBLE) {
|
| 2101 |
src = tmp; |
| 2102 |
} else {
|
| 2103 |
src = gen_new_qreg(QMODE_F64); |
| 2104 |
switch (opsize) {
|
| 2105 |
case OS_LONG:
|
| 2106 |
case OS_WORD:
|
| 2107 |
case OS_BYTE:
|
| 2108 |
gen_op_i32_to_f64(src, tmp); |
| 2109 |
break;
|
| 2110 |
case OS_SINGLE:
|
| 2111 |
gen_op_f32_to_f64(src, tmp); |
| 2112 |
break;
|
| 2113 |
} |
| 2114 |
} |
| 2115 |
} else {
|
| 2116 |
/* Source register. */
|
| 2117 |
src = FREG(ext, 10);
|
| 2118 |
} |
| 2119 |
dest = FREG(ext, 7);
|
| 2120 |
res = gen_new_qreg(QMODE_F64); |
| 2121 |
if (opmode != 0x3a) |
| 2122 |
gen_op_movf64(res, dest); |
| 2123 |
round = 1;
|
| 2124 |
switch (opmode) {
|
| 2125 |
case 0: case 0x40: case 0x44: /* fmove */ |
| 2126 |
gen_op_movf64(res, src); |
| 2127 |
break;
|
| 2128 |
case 1: /* fint */ |
| 2129 |
gen_op_iround_f64(res, src); |
| 2130 |
round = 0;
|
| 2131 |
break;
|
| 2132 |
case 3: /* fintrz */ |
| 2133 |
gen_op_itrunc_f64(res, src); |
| 2134 |
round = 0;
|
| 2135 |
break;
|
| 2136 |
case 4: case 0x41: case 0x45: /* fsqrt */ |
| 2137 |
gen_op_sqrtf64(res, src); |
| 2138 |
break;
|
| 2139 |
case 0x18: case 0x58: case 0x5c: /* fabs */ |
| 2140 |
gen_op_absf64(res, src); |
| 2141 |
break;
|
| 2142 |
case 0x1a: case 0x5a: case 0x5e: /* fneg */ |
| 2143 |
gen_op_chsf64(res, src); |
| 2144 |
break;
|
| 2145 |
case 0x20: case 0x60: case 0x64: /* fdiv */ |
| 2146 |
gen_op_divf64(res, res, src); |
| 2147 |
break;
|
| 2148 |
case 0x22: case 0x62: case 0x66: /* fadd */ |
| 2149 |
gen_op_addf64(res, res, src); |
| 2150 |
break;
|
| 2151 |
case 0x23: case 0x63: case 0x67: /* fmul */ |
| 2152 |
gen_op_mulf64(res, res, src); |
| 2153 |
break;
|
| 2154 |
case 0x28: case 0x68: case 0x6c: /* fsub */ |
| 2155 |
gen_op_subf64(res, res, src); |
| 2156 |
break;
|
| 2157 |
case 0x38: /* fcmp */ |
| 2158 |
gen_op_sub_cmpf64(res, res, src); |
| 2159 |
dest = 0;
|
| 2160 |
round = 0;
|
| 2161 |
break;
|
| 2162 |
case 0x3a: /* ftst */ |
| 2163 |
gen_op_movf64(res, src); |
| 2164 |
dest = 0;
|
| 2165 |
round = 0;
|
| 2166 |
break;
|
| 2167 |
default:
|
| 2168 |
goto undef;
|
| 2169 |
} |
| 2170 |
if (round) {
|
| 2171 |
if (opmode & 0x40) { |
| 2172 |
if ((opmode & 0x4) != 0) |
| 2173 |
round = 0;
|
| 2174 |
} else if ((s->fpcr & M68K_FPCR_PREC) == 0) { |
| 2175 |
round = 0;
|
| 2176 |
} |
| 2177 |
} |
| 2178 |
if (round) {
|
| 2179 |
int tmp;
|
| 2180 |
|
| 2181 |
tmp = gen_new_qreg(QMODE_F32); |
| 2182 |
gen_op_f64_to_f32(tmp, res); |
| 2183 |
gen_op_f32_to_f64(res, tmp); |
| 2184 |
} |
| 2185 |
gen_op_fp_result(res); |
| 2186 |
if (dest) {
|
| 2187 |
gen_op_movf64(dest, res); |
| 2188 |
} |
| 2189 |
return;
|
| 2190 |
undef:
|
| 2191 |
s->pc -= 2;
|
| 2192 |
disas_undef_fpu(s, insn); |
| 2193 |
} |
| 2194 |
|
| 2195 |
DISAS_INSN(fbcc) |
| 2196 |
{
|
| 2197 |
uint32_t offset; |
| 2198 |
uint32_t addr; |
| 2199 |
int flag;
|
| 2200 |
int zero;
|
| 2201 |
int l1;
|
| 2202 |
|
| 2203 |
addr = s->pc; |
| 2204 |
offset = ldsw_code(s->pc); |
| 2205 |
s->pc += 2;
|
| 2206 |
if (insn & (1 << 6)) { |
| 2207 |
offset = (offset << 16) | lduw_code(s->pc);
|
| 2208 |
s->pc += 2;
|
| 2209 |
} |
| 2210 |
|
| 2211 |
l1 = gen_new_label(); |
| 2212 |
/* TODO: Raise BSUN exception. */
|
| 2213 |
flag = gen_new_qreg(QMODE_I32); |
| 2214 |
zero = gen_new_qreg(QMODE_F64); |
| 2215 |
gen_op_zerof64(zero); |
| 2216 |
gen_op_compare_quietf64(flag, QREG_FP_RESULT, zero); |
| 2217 |
/* Jump to l1 if condition is true. */
|
| 2218 |
switch (insn & 0xf) { |
| 2219 |
case 0: /* f */ |
| 2220 |
break;
|
| 2221 |
case 1: /* eq (=0) */ |
| 2222 |
gen_op_jmp_z32(flag, l1); |
| 2223 |
break;
|
| 2224 |
case 2: /* ogt (=1) */ |
| 2225 |
gen_op_sub32(flag, flag, gen_im32(1));
|
| 2226 |
gen_op_jmp_z32(flag, l1); |
| 2227 |
break;
|
| 2228 |
case 3: /* oge (=0 or =1) */ |
| 2229 |
gen_op_jmp_z32(flag, l1); |
| 2230 |
gen_op_sub32(flag, flag, gen_im32(1));
|
| 2231 |
gen_op_jmp_z32(flag, l1); |
| 2232 |
break;
|
| 2233 |
case 4: /* olt (=-1) */ |
| 2234 |
gen_op_jmp_s32(flag, l1); |
| 2235 |
break;
|
| 2236 |
case 5: /* ole (=-1 or =0) */ |
| 2237 |
gen_op_jmp_s32(flag, l1); |
| 2238 |
gen_op_jmp_z32(flag, l1); |
| 2239 |
break;
|
| 2240 |
case 6: /* ogl (=-1 or =1) */ |
| 2241 |
gen_op_jmp_s32(flag, l1); |
| 2242 |
gen_op_sub32(flag, flag, gen_im32(1));
|
| 2243 |
gen_op_jmp_z32(flag, l1); |
| 2244 |
break;
|
| 2245 |
case 7: /* or (=2) */ |
| 2246 |
gen_op_sub32(flag, flag, gen_im32(2));
|
| 2247 |
gen_op_jmp_z32(flag, l1); |
| 2248 |
break;
|
| 2249 |
case 8: /* un (<2) */ |
| 2250 |
gen_op_sub32(flag, flag, gen_im32(2));
|
| 2251 |
gen_op_jmp_s32(flag, l1); |
| 2252 |
break;
|
| 2253 |
case 9: /* ueq (=0 or =2) */ |
| 2254 |
gen_op_jmp_z32(flag, l1); |
| 2255 |
gen_op_sub32(flag, flag, gen_im32(2));
|
| 2256 |
gen_op_jmp_z32(flag, l1); |
| 2257 |
break;
|
| 2258 |
case 10: /* ugt (>0) */ |
| 2259 |
/* ??? Add jmp_gtu. */
|
| 2260 |
gen_op_sub32(flag, flag, gen_im32(1));
|
| 2261 |
gen_op_jmp_ns32(flag, l1); |
| 2262 |
break;
|
| 2263 |
case 11: /* uge (>=0) */ |
| 2264 |
gen_op_jmp_ns32(flag, l1); |
| 2265 |
break;
|
| 2266 |
case 12: /* ult (=-1 or =2) */ |
| 2267 |
gen_op_jmp_s32(flag, l1); |
| 2268 |
gen_op_sub32(flag, flag, gen_im32(2));
|
| 2269 |
gen_op_jmp_z32(flag, l1); |
| 2270 |
break;
|
| 2271 |
case 13: /* ule (!=1) */ |
| 2272 |
gen_op_sub32(flag, flag, gen_im32(1));
|
| 2273 |
gen_op_jmp_nz32(flag, l1); |
| 2274 |
break;
|
| 2275 |
case 14: /* ne (!=0) */ |
| 2276 |
gen_op_jmp_nz32(flag, l1); |
| 2277 |
break;
|
| 2278 |
case 15: /* t */ |
| 2279 |
gen_op_mov32(flag, gen_im32(1));
|
| 2280 |
break;
|
| 2281 |
} |
| 2282 |
gen_jmp_tb(s, 0, s->pc);
|
| 2283 |
gen_set_label(l1); |
| 2284 |
gen_jmp_tb(s, 1, addr + offset);
|
| 2285 |
} |
| 2286 |
|
| 2287 |
DISAS_INSN(frestore) |
| 2288 |
{
|
| 2289 |
/* TODO: Implement frestore. */
|
| 2290 |
qemu_assert(0, "FRESTORE not implemented"); |
| 2291 |
} |
| 2292 |
|
| 2293 |
DISAS_INSN(fsave) |
| 2294 |
{
|
| 2295 |
/* TODO: Implement fsave. */
|
| 2296 |
qemu_assert(0, "FSAVE not implemented"); |
| 2297 |
} |
| 2298 |
|
| 2299 |
static disas_proc opcode_table[65536]; |
| 2300 |
|
| 2301 |
static void |
| 2302 |
register_opcode (disas_proc proc, uint16_t opcode, uint16_t mask) |
| 2303 |
{
|
| 2304 |
int i;
|
| 2305 |
int from;
|
| 2306 |
int to;
|
| 2307 |
|
| 2308 |
/* Sanity check. All set bits must be included in the mask. */
|
| 2309 |
if (opcode & ~mask)
|
| 2310 |
abort(); |
| 2311 |
/* This could probably be cleverer. For now just optimize the case where
|
| 2312 |
the top bits are known. */
|
| 2313 |
/* Find the first zero bit in the mask. */
|
| 2314 |
i = 0x8000;
|
| 2315 |
while ((i & mask) != 0) |
| 2316 |
i >>= 1;
|
| 2317 |
/* Iterate over all combinations of this and lower bits. */
|
| 2318 |
if (i == 0) |
| 2319 |
i = 1;
|
| 2320 |
else
|
| 2321 |
i <<= 1;
|
| 2322 |
from = opcode & ~(i - 1);
|
| 2323 |
to = from + i; |
| 2324 |
for (i = from; i < to; i++) {
|
| 2325 |
if ((i & mask) == opcode)
|
| 2326 |
opcode_table[i] = proc; |
| 2327 |
} |
| 2328 |
} |
| 2329 |
|
| 2330 |
/* Register m68k opcode handlers. Order is important.
|
| 2331 |
Later insn override earlier ones. */
|
| 2332 |
void register_m68k_insns (CPUM68KState *env)
|
| 2333 |
{
|
| 2334 |
#define INSN(name, opcode, mask, feature) \
|
| 2335 |
if (m68k_feature(env, M68K_FEATURE_##feature)) \ |
| 2336 |
register_opcode(disas_##name, 0x##opcode, 0x##mask) |
| 2337 |
INSN(undef, 0000, 0000, CF_ISA_A); |
| 2338 |
INSN(arith_im, 0080, fff8, CF_ISA_A);
|
| 2339 |
INSN(bitrev, 00c0, fff8, CF_ISA_C);
|
| 2340 |
INSN(bitop_reg, 0100, f1c0, CF_ISA_A);
|
| 2341 |
INSN(bitop_reg, 0140, f1c0, CF_ISA_A);
|
| 2342 |
INSN(bitop_reg, 0180, f1c0, CF_ISA_A);
|
| 2343 |
INSN(bitop_reg, 01c0, f1c0, CF_ISA_A);
|
| 2344 |
INSN(arith_im, 0280, fff8, CF_ISA_A);
|
| 2345 |
INSN(byterev, 02c0, fff8, CF_ISA_A);
|
| 2346 |
INSN(arith_im, 0480, fff8, CF_ISA_A);
|
| 2347 |
INSN(ff1, 04c0, fff8, CF_ISA_C);
|
| 2348 |
INSN(arith_im, 0680, fff8, CF_ISA_A);
|
| 2349 |
INSN(bitop_im, 0800, ffc0, CF_ISA_A);
|
| 2350 |
INSN(bitop_im, 0840, ffc0, CF_ISA_A);
|
| 2351 |
INSN(bitop_im, 0880, ffc0, CF_ISA_A);
|
| 2352 |
INSN(bitop_im, 08c0, ffc0, CF_ISA_A);
|
| 2353 |
INSN(arith_im, 0a80, fff8, CF_ISA_A);
|
| 2354 |
INSN(arith_im, 0c00, ff38, CF_ISA_A);
|
| 2355 |
INSN(move, 1000, f000, CF_ISA_A);
|
| 2356 |
INSN(move, 2000, f000, CF_ISA_A);
|
| 2357 |
INSN(move, 3000, f000, CF_ISA_A);
|
| 2358 |
INSN(strldsr, 40e7, ffff, CF_ISA_A); |
| 2359 |
INSN(negx, 4080, fff8, CF_ISA_A);
|
| 2360 |
INSN(move_from_sr, 40c0, fff8, CF_ISA_A);
|
| 2361 |
INSN(lea, 41c0, f1c0, CF_ISA_A);
|
| 2362 |
INSN(clr, 4200, ff00, CF_ISA_A);
|
| 2363 |
INSN(undef, 42c0, ffc0, CF_ISA_A);
|
| 2364 |
INSN(move_from_ccr, 42c0, fff8, CF_ISA_A);
|
| 2365 |
INSN(neg, 4480, fff8, CF_ISA_A);
|
| 2366 |
INSN(move_to_ccr, 44c0, ffc0, CF_ISA_A);
|
| 2367 |
INSN(not, 4680, fff8, CF_ISA_A);
|
| 2368 |
INSN(move_to_sr, 46c0, ffc0, CF_ISA_A);
|
| 2369 |
INSN(pea, 4840, ffc0, CF_ISA_A);
|
| 2370 |
INSN(swap, 4840, fff8, CF_ISA_A);
|
| 2371 |
INSN(movem, 48c0, fbc0, CF_ISA_A);
|
| 2372 |
INSN(ext, 4880, fff8, CF_ISA_A);
|
| 2373 |
INSN(ext, 48c0, fff8, CF_ISA_A);
|
| 2374 |
INSN(ext, 49c0, fff8, CF_ISA_A);
|
| 2375 |
INSN(tst, 4a00, ff00, CF_ISA_A);
|
| 2376 |
INSN(tas, 4ac0, ffc0, CF_ISA_B);
|
| 2377 |
INSN(halt, 4ac8, ffff, CF_ISA_A);
|
| 2378 |
INSN(pulse, 4acc, ffff, CF_ISA_A);
|
| 2379 |
INSN(illegal, 4afc, ffff, CF_ISA_A);
|
| 2380 |
INSN(mull, 4c00, ffc0, CF_ISA_A);
|
| 2381 |
INSN(divl, 4c40, ffc0, CF_ISA_A);
|
| 2382 |
INSN(sats, 4c80, fff8, CF_ISA_B);
|
| 2383 |
INSN(trap, 4e40, fff0, CF_ISA_A);
|
| 2384 |
INSN(link, 4e50, fff8, CF_ISA_A);
|
| 2385 |
INSN(unlk, 4e58, fff8, CF_ISA_A);
|
| 2386 |
INSN(move_to_usp, 4e60, fff8, CF_ISA_B);
|
| 2387 |
INSN(move_from_usp, 4e68, fff8, CF_ISA_B);
|
| 2388 |
INSN(nop, 4e71, ffff, CF_ISA_A);
|
| 2389 |
INSN(stop, 4e72, ffff, CF_ISA_A);
|
| 2390 |
INSN(rte, 4e73, ffff, CF_ISA_A);
|
| 2391 |
INSN(rts, 4e75, ffff, CF_ISA_A);
|
| 2392 |
INSN(movec, 4e7b, ffff, CF_ISA_A);
|
| 2393 |
INSN(jump, 4e80, ffc0, CF_ISA_A);
|
| 2394 |
INSN(jump, 4ec0, ffc0, CF_ISA_A);
|
| 2395 |
INSN(addsubq, 5180, f1c0, CF_ISA_A);
|
| 2396 |
INSN(scc, 50c0, f0f8, CF_ISA_A);
|
| 2397 |
INSN(addsubq, 5080, f1c0, CF_ISA_A);
|
| 2398 |
INSN(tpf, 51f8, fff8, CF_ISA_A); |
| 2399 |
INSN(branch, 6000, f000, CF_ISA_A);
|
| 2400 |
INSN(moveq, 7000, f100, CF_ISA_A);
|
| 2401 |
INSN(mvzs, 7100, f100, CF_ISA_B);
|
| 2402 |
INSN(or, 8000, f000, CF_ISA_A);
|
| 2403 |
INSN(divw, 80c0, f0c0, CF_ISA_A);
|
| 2404 |
INSN(addsub, 9000, f000, CF_ISA_A);
|
| 2405 |
INSN(subx, 9180, f1f8, CF_ISA_A);
|
| 2406 |
INSN(suba, 91c0, f1c0, CF_ISA_A);
|
| 2407 |
INSN(undef_mac, a000, f000, CF_ISA_A); |
| 2408 |
INSN(mov3q, a140, f1c0, CF_ISA_B); |
| 2409 |
INSN(cmp, b000, f1c0, CF_ISA_B); /* cmp.b */
|
| 2410 |
INSN(cmp, b040, f1c0, CF_ISA_B); /* cmp.w */
|
| 2411 |
INSN(cmpa, b0c0, f1c0, CF_ISA_B); /* cmpa.w */
|
| 2412 |
INSN(cmp, b080, f1c0, CF_ISA_A); |
| 2413 |
INSN(cmpa, b1c0, f1c0, CF_ISA_A); |
| 2414 |
INSN(eor, b180, f1c0, CF_ISA_A); |
| 2415 |
INSN(and, c000, f000, CF_ISA_A); |
| 2416 |
INSN(mulw, c0c0, f0c0, CF_ISA_A); |
| 2417 |
INSN(addsub, d000, f000, CF_ISA_A); |
| 2418 |
INSN(addx, d180, f1f8, CF_ISA_A); |
| 2419 |
INSN(adda, d1c0, f1c0, CF_ISA_A); |
| 2420 |
INSN(shift_im, e080, f0f0, CF_ISA_A); |
| 2421 |
INSN(shift_reg, e0a0, f0f0, CF_ISA_A); |
| 2422 |
INSN(undef_fpu, f000, f000, CF_ISA_A); |
| 2423 |
INSN(fpu, f200, ffc0, CF_FPU); |
| 2424 |
INSN(fbcc, f280, ffc0, CF_FPU); |
| 2425 |
INSN(frestore, f340, ffc0, CF_FPU); |
| 2426 |
INSN(fsave, f340, ffc0, CF_FPU); |
| 2427 |
INSN(intouch, f340, ffc0, CF_ISA_A); |
| 2428 |
INSN(cpushl, f428, ff38, CF_ISA_A); |
| 2429 |
INSN(wddata, fb00, ff00, CF_ISA_A); |
| 2430 |
INSN(wdebug, fbc0, ffc0, CF_ISA_A); |
| 2431 |
#undef INSN
|
| 2432 |
} |
| 2433 |
|
| 2434 |
/* ??? Some of this implementation is not exception safe. We should always
|
| 2435 |
write back the result to memory before setting the condition codes. */
|
| 2436 |
static void disas_m68k_insn(CPUState * env, DisasContext *s) |
| 2437 |
{
|
| 2438 |
uint16_t insn; |
| 2439 |
|
| 2440 |
insn = lduw_code(s->pc); |
| 2441 |
s->pc += 2;
|
| 2442 |
|
| 2443 |
opcode_table[insn](s, insn); |
| 2444 |
} |
| 2445 |
|
| 2446 |
#if 0
|
| 2447 |
/* Save the result of a floating point operation. */
|
| 2448 |
static void expand_op_fp_result(qOP *qop)
|
| 2449 |
{
|
| 2450 |
gen_op_movf64(QREG_FP_RESULT, qop->args[0]);
|
| 2451 |
}
|
| 2452 |
|
| 2453 |
/* Dummy op to indicate that the flags have been set. */
|
| 2454 |
static void expand_op_flags_set(qOP *qop)
|
| 2455 |
{
|
| 2456 |
}
|
| 2457 |
|
| 2458 |
/* Convert the confition codes into CC_OP_FLAGS format. */
|
| 2459 |
static void expand_op_flush_flags(qOP *qop)
|
| 2460 |
{
|
| 2461 |
int cc_opreg;
|
| 2462 |
|
| 2463 |
if (qop->args[0] == CC_OP_DYNAMIC)
|
| 2464 |
cc_opreg = QREG_CC_OP;
|
| 2465 |
else
|
| 2466 |
cc_opreg = gen_im32(qop->args[0]);
|
| 2467 |
gen_op_helper32(QREG_NULL, cc_opreg, HELPER_flush_flags);
|
| 2468 |
}
|
| 2469 |
|
| 2470 |
/* Set CC_DEST after a logical or direct flag setting operation. */
|
| 2471 |
static void expand_op_logic_cc(qOP *qop)
|
| 2472 |
{
|
| 2473 |
gen_op_mov32(QREG_CC_DEST, qop->args[0]);
|
| 2474 |
}
|
| 2475 |
|
| 2476 |
/* Set CC_SRC and CC_DEST after an arithmetic operation. */
|
| 2477 |
static void expand_op_update_cc_add(qOP *qop)
|
| 2478 |
{
|
| 2479 |
gen_op_mov32(QREG_CC_DEST, qop->args[0]);
|
| 2480 |
gen_op_mov32(QREG_CC_SRC, qop->args[1]);
|
| 2481 |
}
|
| 2482 |
|
| 2483 |
/* Update the X flag. */
|
| 2484 |
static void expand_op_update_xflag(qOP *qop)
|
| 2485 |
{
|
| 2486 |
int arg0;
|
| 2487 |
int arg1;
|
| 2488 |
|
| 2489 |
arg0 = qop->args[0];
|
| 2490 |
arg1 = qop->args[1];
|
| 2491 |
if (arg1 == QREG_NULL) {
|
| 2492 |
/* CC_X = arg0. */
|
| 2493 |
gen_op_mov32(QREG_CC_X, arg0);
|
| 2494 |
} else {
|
| 2495 |
/* CC_X = arg0 < (unsigned)arg1. */
|
| 2496 |
gen_op_set_ltu32(QREG_CC_X, arg0, arg1);
|
| 2497 |
}
|
| 2498 |
}
|
| 2499 |
|
| 2500 |
/* Set arg0 to the contents of the X flag. */
|
| 2501 |
static void expand_op_get_xflag(qOP *qop)
|
| 2502 |
{
|
| 2503 |
gen_op_mov32(qop->args[0], QREG_CC_X);
|
| 2504 |
}
|
| 2505 |
|
| 2506 |
/* Expand a shift by immediate. The ISA only allows shifts by 1-8, so we
|
| 2507 |
already know the shift is within range. */
|
| 2508 |
static inline void expand_shift_im(qOP *qop, int right, int arith)
|
| 2509 |
{
|
| 2510 |
int val;
|
| 2511 |
int reg;
|
| 2512 |
int tmp;
|
| 2513 |
int im;
|
| 2514 |
|
| 2515 |
reg = qop->args[0];
|
| 2516 |
im = qop->args[1];
|
| 2517 |
tmp = gen_im32(im);
|
| 2518 |
val = gen_new_qreg(QMODE_I32);
|
| 2519 |
gen_op_mov32(val, reg);
|
| 2520 |
gen_op_mov32(QREG_CC_DEST, val);
|
| 2521 |
gen_op_mov32(QREG_CC_SRC, tmp);
|
| 2522 |
if (right) {
|
| 2523 |
if (arith) {
|
| 2524 |
gen_op_sar32(reg, val, tmp);
|
| 2525 |
} else {
|
| 2526 |
gen_op_shr32(reg, val, tmp);
|
| 2527 |
}
|
| 2528 |
if (im == 1)
|
| 2529 |
tmp = QREG_NULL;
|
| 2530 |
else
|
| 2531 |
tmp = gen_im32(im - 1);
|
| 2532 |
} else {
|
| 2533 |
gen_op_shl32(reg, val, tmp);
|
| 2534 |
tmp = gen_im32(32 - im);
|
| 2535 |
}
|
| 2536 |
if (tmp != QREG_NULL)
|
| 2537 |
gen_op_shr32(val, val, tmp);
|
| 2538 |
gen_op_and32(QREG_CC_X, val, gen_im32(1));
|
| 2539 |
}
|
| 2540 |
|
| 2541 |
static void expand_op_shl_im_cc(qOP *qop)
|
| 2542 |
{
|
| 2543 |
expand_shift_im(qop, 0, 0);
|
| 2544 |
}
|
| 2545 |
|
| 2546 |
static void expand_op_shr_im_cc(qOP *qop)
|
| 2547 |
{
|
| 2548 |
expand_shift_im(qop, 1, 0);
|
| 2549 |
}
|
| 2550 |
|
| 2551 |
static void expand_op_sar_im_cc(qOP *qop)
|
| 2552 |
{
|
| 2553 |
expand_shift_im(qop, 1, 1);
|
| 2554 |
}
|
| 2555 |
|
| 2556 |
/* Expand a shift by register. */
|
| 2557 |
/* ??? This gives incorrect answers for shifts by 0 or >= 32 */
|
| 2558 |
static inline void expand_shift_reg(qOP *qop, int right, int arith)
|
| 2559 |
{
|
| 2560 |
int val;
|
| 2561 |
int reg;
|
| 2562 |
int shift;
|
| 2563 |
int tmp;
|
| 2564 |
|
| 2565 |
reg = qop->args[0];
|
| 2566 |
shift = qop->args[1];
|
| 2567 |
val = gen_new_qreg(QMODE_I32);
|
| 2568 |
gen_op_mov32(val, reg);
|
| 2569 |
gen_op_mov32(QREG_CC_DEST, val);
|
| 2570 |
gen_op_mov32(QREG_CC_SRC, shift);
|
| 2571 |
tmp = gen_new_qreg(QMODE_I32);
|
| 2572 |
if (right) {
|
| 2573 |
if (arith) {
|
| 2574 |
gen_op_sar32(reg, val, shift);
|
| 2575 |
} else {
|
| 2576 |
gen_op_shr32(reg, val, shift);
|
| 2577 |
}
|
| 2578 |
gen_op_sub32(tmp, shift, gen_im32(1));
|
| 2579 |
} else {
|
| 2580 |
gen_op_shl32(reg, val, shift);
|
| 2581 |
gen_op_sub32(tmp, gen_im32(31), shift);
|
| 2582 |
}
|
| 2583 |
gen_op_shl32(val, val, tmp);
|
| 2584 |
gen_op_and32(QREG_CC_X, val, gen_im32(1));
|
| 2585 |
}
|
| 2586 |
|
| 2587 |
static void expand_op_shl_cc(qOP *qop)
|
| 2588 |
{
|
| 2589 |
expand_shift_reg(qop, 0, 0);
|
| 2590 |
}
|
| 2591 |
|
| 2592 |
static void expand_op_shr_cc(qOP *qop)
|
| 2593 |
{
|
| 2594 |
expand_shift_reg(qop, 1, 0);
|
| 2595 |
}
|
| 2596 |
|
| 2597 |
static void expand_op_sar_cc(qOP *qop)
|
| 2598 |
{
|
| 2599 |
expand_shift_reg(qop, 1, 1);
|
| 2600 |
}
|
| 2601 |
|
| 2602 |
/* Set the Z flag to (arg0 & arg1) == 0. */
|
| 2603 |
static void expand_op_btest(qOP *qop)
|
| 2604 |
{
|
| 2605 |
int tmp;
|
| 2606 |
int l1;
|
| 2607 |
|
| 2608 |
l1 = gen_new_label();
|
| 2609 |
tmp = gen_new_qreg(QMODE_I32);
|
| 2610 |
gen_op_and32(tmp, qop->args[0], qop->args[1]);
|
| 2611 |
gen_op_and32(QREG_CC_DEST, QREG_CC_DEST, gen_im32(~(uint32_t)CCF_Z));
|
| 2612 |
gen_op_jmp_nz32(tmp, l1);
|
| 2613 |
gen_op_or32(QREG_CC_DEST, QREG_CC_DEST, gen_im32(CCF_Z));
|
| 2614 |
gen_op_label(l1);
|
| 2615 |
}
|
| 2616 |
|
| 2617 |
/* arg0 += arg1 + CC_X */
|
| 2618 |
static void expand_op_addx_cc(qOP *qop)
|
| 2619 |
{
|
| 2620 |
int arg0 = qop->args[0];
|
| 2621 |
int arg1 = qop->args[1];
|
| 2622 |
int l1, l2;
|
| 2623 |
|
| 2624 |
gen_op_add32 (arg0, arg0, arg1);
|
| 2625 |
l1 = gen_new_label();
|
| 2626 |
l2 = gen_new_label();
|
| 2627 |
gen_op_jmp_z32(QREG_CC_X, l1);
|
| 2628 |
gen_op_add32(arg0, arg0, gen_im32(1));
|
| 2629 |
gen_op_mov32(QREG_CC_OP, gen_im32(CC_OP_ADDX));
|
| 2630 |
gen_op_set_leu32(QREG_CC_X, arg0, arg1);
|
| 2631 |
gen_op_jmp(l2);
|
| 2632 |
gen_set_label(l1);
|
| 2633 |
gen_op_mov32(QREG_CC_OP, gen_im32(CC_OP_ADD));
|
| 2634 |
gen_op_set_ltu32(QREG_CC_X, arg0, arg1);
|
| 2635 |
gen_set_label(l2);
|
| 2636 |
}
|
| 2637 |
|
| 2638 |
/* arg0 -= arg1 + CC_X */
|
| 2639 |
static void expand_op_subx_cc(qOP *qop)
|
| 2640 |
{
|
| 2641 |
int arg0 = qop->args[0];
|
| 2642 |
int arg1 = qop->args[1];
|
| 2643 |
int l1, l2;
|
| 2644 |
|
| 2645 |
l1 = gen_new_label();
|
| 2646 |
l2 = gen_new_label();
|
| 2647 |
gen_op_jmp_z32(QREG_CC_X, l1);
|
| 2648 |
gen_op_set_leu32(QREG_CC_X, arg0, arg1);
|
| 2649 |
gen_op_sub32(arg0, arg0, gen_im32(1));
|
| 2650 |
gen_op_mov32(QREG_CC_OP, gen_im32(CC_OP_SUBX));
|
| 2651 |
gen_op_jmp(l2);
|
| 2652 |
gen_set_label(l1);
|
| 2653 |
gen_op_set_ltu32(QREG_CC_X, arg0, arg1);
|
| 2654 |
gen_op_mov32(QREG_CC_OP, gen_im32(CC_OP_SUB));
|
| 2655 |
gen_set_label(l2);
|
| 2656 |
gen_op_sub32 (arg0, arg0, arg1);
|
| 2657 |
}
|
| 2658 |
|
| 2659 |
/* Expand target specific ops to generic qops. */
|
| 2660 |
static void expand_target_qops(void)
|
| 2661 |
{
|
| 2662 |
qOP *qop;
|
| 2663 |
qOP *next;
|
| 2664 |
int c;
|
| 2665 |
|
| 2666 |
/* Copy the list of qops, expanding target specific ops as we go. */
|
| 2667 |
qop = gen_first_qop;
|
| 2668 |
gen_first_qop = NULL;
|
| 2669 |
gen_last_qop = NULL;
|
| 2670 |
for (; qop; qop = next) {
|
| 2671 |
c = qop->opcode;
|
| 2672 |
next = qop->next;
|
| 2673 |
if (c < FIRST_TARGET_OP) {
|
| 2674 |
qop->prev = gen_last_qop;
|
| 2675 |
qop->next = NULL;
|
| 2676 |
if (gen_last_qop)
|
| 2677 |
gen_last_qop->next = qop;
|
| 2678 |
else
|
| 2679 |
gen_first_qop = qop;
|
| 2680 |
gen_last_qop = qop;
|
| 2681 |
continue;
|
| 2682 |
}
|
| 2683 |
switch (c) {
|
| 2684 |
#define DEF(name, nargs, barrier) \
|
| 2685 |
case INDEX_op_##name: \
|
| 2686 |
expand_op_##name(qop); \
|
| 2687 |
break;
|
| 2688 |
#include "qop-target.def"
|
| 2689 |
#undef DEF
|
| 2690 |
default:
|
| 2691 |
cpu_abort(NULL, "Unexpanded target qop");
|
| 2692 |
}
|
| 2693 |
}
|
| 2694 |
}
|
| 2695 |
|
| 2696 |
/* ??? Implement this. */
|
| 2697 |
static void
|
| 2698 |
optimize_flags(void)
|
| 2699 |
{
|
| 2700 |
}
|
| 2701 |
#endif
|
| 2702 |
|
| 2703 |
/* generate intermediate code for basic block 'tb'. */
|
| 2704 |
static inline int |
| 2705 |
gen_intermediate_code_internal(CPUState *env, TranslationBlock *tb, |
| 2706 |
int search_pc)
|
| 2707 |
{
|
| 2708 |
DisasContext dc1, *dc = &dc1; |
| 2709 |
uint16_t *gen_opc_end; |
| 2710 |
int j, lj;
|
| 2711 |
target_ulong pc_start; |
| 2712 |
int pc_offset;
|
| 2713 |
int last_cc_op;
|
| 2714 |
|
| 2715 |
/* generate intermediate code */
|
| 2716 |
pc_start = tb->pc; |
| 2717 |
|
| 2718 |
dc->tb = tb; |
| 2719 |
|
| 2720 |
gen_opc_ptr = gen_opc_buf; |
| 2721 |
gen_opc_end = gen_opc_buf + OPC_MAX_SIZE; |
| 2722 |
gen_opparam_ptr = gen_opparam_buf; |
| 2723 |
|
| 2724 |
dc->is_jmp = DISAS_NEXT; |
| 2725 |
dc->pc = pc_start; |
| 2726 |
dc->cc_op = CC_OP_DYNAMIC; |
| 2727 |
dc->singlestep_enabled = env->singlestep_enabled; |
| 2728 |
dc->fpcr = env->fpcr; |
| 2729 |
dc->user = (env->sr & SR_S) == 0;
|
| 2730 |
nb_gen_labels = 0;
|
| 2731 |
lj = -1;
|
| 2732 |
do {
|
| 2733 |
free_qreg = 0;
|
| 2734 |
pc_offset = dc->pc - pc_start; |
| 2735 |
gen_throws_exception = NULL;
|
| 2736 |
if (env->nb_breakpoints > 0) { |
| 2737 |
for(j = 0; j < env->nb_breakpoints; j++) { |
| 2738 |
if (env->breakpoints[j] == dc->pc) {
|
| 2739 |
gen_exception(dc, dc->pc, EXCP_DEBUG); |
| 2740 |
dc->is_jmp = DISAS_JUMP; |
| 2741 |
break;
|
| 2742 |
} |
| 2743 |
} |
| 2744 |
if (dc->is_jmp)
|
| 2745 |
break;
|
| 2746 |
} |
| 2747 |
if (search_pc) {
|
| 2748 |
j = gen_opc_ptr - gen_opc_buf; |
| 2749 |
if (lj < j) {
|
| 2750 |
lj++; |
| 2751 |
while (lj < j)
|
| 2752 |
gen_opc_instr_start[lj++] = 0;
|
| 2753 |
} |
| 2754 |
gen_opc_pc[lj] = dc->pc; |
| 2755 |
gen_opc_instr_start[lj] = 1;
|
| 2756 |
} |
| 2757 |
last_cc_op = dc->cc_op; |
| 2758 |
disas_m68k_insn(env, dc); |
| 2759 |
} while (!dc->is_jmp && gen_opc_ptr < gen_opc_end &&
|
| 2760 |
!env->singlestep_enabled && |
| 2761 |
(pc_offset) < (TARGET_PAGE_SIZE - 32));
|
| 2762 |
|
| 2763 |
if (__builtin_expect(env->singlestep_enabled, 0)) { |
| 2764 |
/* Make sure the pc is updated, and raise a debug exception. */
|
| 2765 |
if (!dc->is_jmp) {
|
| 2766 |
gen_flush_cc_op(dc); |
| 2767 |
gen_op_mov32(QREG_PC, gen_im32((long)dc->pc));
|
| 2768 |
} |
| 2769 |
gen_op_raise_exception(EXCP_DEBUG); |
| 2770 |
} else {
|
| 2771 |
switch(dc->is_jmp) {
|
| 2772 |
case DISAS_NEXT:
|
| 2773 |
gen_flush_cc_op(dc); |
| 2774 |
gen_jmp_tb(dc, 0, dc->pc);
|
| 2775 |
break;
|
| 2776 |
default:
|
| 2777 |
case DISAS_JUMP:
|
| 2778 |
case DISAS_UPDATE:
|
| 2779 |
gen_flush_cc_op(dc); |
| 2780 |
/* indicate that the hash table must be used to find the next TB */
|
| 2781 |
gen_op_mov32(QREG_T0, gen_im32(0));
|
| 2782 |
gen_op_exit_tb(); |
| 2783 |
break;
|
| 2784 |
case DISAS_TB_JUMP:
|
| 2785 |
/* nothing more to generate */
|
| 2786 |
break;
|
| 2787 |
} |
| 2788 |
} |
| 2789 |
*gen_opc_ptr = INDEX_op_end; |
| 2790 |
|
| 2791 |
#ifdef DEBUG_DISAS
|
| 2792 |
if (loglevel & CPU_LOG_TB_IN_ASM) {
|
| 2793 |
fprintf(logfile, "----------------\n");
|
| 2794 |
fprintf(logfile, "IN: %s\n", lookup_symbol(pc_start));
|
| 2795 |
target_disas(logfile, pc_start, dc->pc - pc_start, 0);
|
| 2796 |
fprintf(logfile, "\n");
|
| 2797 |
if (loglevel & (CPU_LOG_TB_OP)) {
|
| 2798 |
fprintf(logfile, "OP:\n");
|
| 2799 |
dump_ops(gen_opc_buf, gen_opparam_buf); |
| 2800 |
fprintf(logfile, "\n");
|
| 2801 |
} |
| 2802 |
} |
| 2803 |
#endif
|
| 2804 |
if (search_pc) {
|
| 2805 |
j = gen_opc_ptr - gen_opc_buf; |
| 2806 |
lj++; |
| 2807 |
while (lj <= j)
|
| 2808 |
gen_opc_instr_start[lj++] = 0;
|
| 2809 |
tb->size = 0;
|
| 2810 |
} else {
|
| 2811 |
tb->size = dc->pc - pc_start; |
| 2812 |
} |
| 2813 |
|
| 2814 |
//optimize_flags();
|
| 2815 |
//expand_target_qops();
|
| 2816 |
return 0; |
| 2817 |
} |
| 2818 |
|
| 2819 |
int gen_intermediate_code(CPUState *env, TranslationBlock *tb)
|
| 2820 |
{
|
| 2821 |
return gen_intermediate_code_internal(env, tb, 0); |
| 2822 |
} |
| 2823 |
|
| 2824 |
int gen_intermediate_code_pc(CPUState *env, TranslationBlock *tb)
|
| 2825 |
{
|
| 2826 |
return gen_intermediate_code_internal(env, tb, 1); |
| 2827 |
} |
| 2828 |
|
| 2829 |
void cpu_reset(CPUM68KState *env)
|
| 2830 |
{
|
| 2831 |
memset(env, 0, offsetof(CPUM68KState, breakpoints));
|
| 2832 |
#if !defined (CONFIG_USER_ONLY)
|
| 2833 |
env->sr = 0x2700;
|
| 2834 |
#endif
|
| 2835 |
/* ??? FP regs should be initialized to NaN. */
|
| 2836 |
env->cc_op = CC_OP_FLAGS; |
| 2837 |
/* TODO: We should set PC from the interrupt vector. */
|
| 2838 |
env->pc = 0;
|
| 2839 |
tlb_flush(env, 1);
|
| 2840 |
} |
| 2841 |
|
| 2842 |
CPUM68KState *cpu_m68k_init(void)
|
| 2843 |
{
|
| 2844 |
CPUM68KState *env; |
| 2845 |
|
| 2846 |
env = malloc(sizeof(CPUM68KState));
|
| 2847 |
if (!env)
|
| 2848 |
return NULL; |
| 2849 |
cpu_exec_init(env); |
| 2850 |
|
| 2851 |
cpu_reset(env); |
| 2852 |
return env;
|
| 2853 |
} |
| 2854 |
|
| 2855 |
void cpu_m68k_close(CPUM68KState *env)
|
| 2856 |
{
|
| 2857 |
free(env); |
| 2858 |
} |
| 2859 |
|
| 2860 |
void cpu_dump_state(CPUState *env, FILE *f,
|
| 2861 |
int (*cpu_fprintf)(FILE *f, const char *fmt, ...), |
| 2862 |
int flags)
|
| 2863 |
{
|
| 2864 |
int i;
|
| 2865 |
uint16_t sr; |
| 2866 |
CPU_DoubleU u; |
| 2867 |
for (i = 0; i < 8; i++) |
| 2868 |
{
|
| 2869 |
u.d = env->fregs[i]; |
| 2870 |
cpu_fprintf (f, "D%d = %08x A%d = %08x F%d = %08x%08x (%12g)\n",
|
| 2871 |
i, env->dregs[i], i, env->aregs[i], |
| 2872 |
i, u.l.upper, u.l.lower, u.d); |
| 2873 |
} |
| 2874 |
cpu_fprintf (f, "PC = %08x ", env->pc);
|
| 2875 |
sr = env->sr; |
| 2876 |
cpu_fprintf (f, "SR = %04x %c%c%c%c%c ", sr, (sr & 0x10) ? 'X' : '-', |
| 2877 |
(sr & CCF_N) ? 'N' : '-', (sr & CCF_Z) ? 'Z' : '-', |
| 2878 |
(sr & CCF_V) ? 'V' : '-', (sr & CCF_C) ? 'C' : '-'); |
| 2879 |
cpu_fprintf (f, "FPRESULT = %12g\n", env->fp_result);
|
| 2880 |
} |
| 2881 |
|