4 * Copyright (c) 2005-2007 CodeSourcery
5 * Written by Paul Brook
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
31 #include "m68k-qreg.h"
33 //#define DEBUG_DISPATCH 1
35 static inline void qemu_assert(int cond, const char *msg)
38 fprintf (stderr, "badness: %s\n", msg);
43 /* internal defines */
44 typedef struct DisasContext {
46 target_ulong insn_pc; /* Start of the current instruction. */
52 struct TranslationBlock *tb;
53 int singlestep_enabled;
56 #define DISAS_JUMP_NEXT 4
58 #if defined(CONFIG_USER_ONLY)
61 #define IS_USER(s) s->user
64 /* XXX: move that elsewhere */
65 /* ??? Fix exceptions. */
66 static void *gen_throws_exception;
67 #define gen_last_qop NULL
69 static uint16_t *gen_opc_ptr;
70 static uint32_t *gen_opparam_ptr;
75 #define DEF(s, n, copy_size) INDEX_op_ ## s,
83 #if defined(CONFIG_USER_ONLY)
84 #define gen_st(s, name, addr, val) gen_op_st##name##_raw(addr, val)
85 #define gen_ld(s, name, val, addr) gen_op_ld##name##_raw(val, addr)
87 #define gen_st(s, name, addr, val) do { \
89 gen_op_st##name##_user(addr, val); \
91 gen_op_st##name##_kernel(addr, val); \
93 #define gen_ld(s, name, val, addr) do { \
95 gen_op_ld##name##_user(val, addr); \
97 gen_op_ld##name##_kernel(val, addr); \
101 #include "op-hacks.h"
109 #define DREG(insn, pos) (((insn >> pos) & 7) + QREG_D0)
110 #define AREG(insn, pos) (((insn >> pos) & 7) + QREG_A0)
111 #define FREG(insn, pos) (((insn >> pos) & 7) + QREG_F0)
113 typedef void (*disas_proc)(DisasContext *, uint16_t);
115 #ifdef DEBUG_DISPATCH
116 #define DISAS_INSN(name) \
117 static void real_disas_##name (DisasContext *s, uint16_t insn); \
118 static void disas_##name (DisasContext *s, uint16_t insn) { \
119 if (logfile) fprintf(logfile, "Dispatch " #name "\n"); \
120 real_disas_##name(s, insn); } \
121 static void real_disas_##name (DisasContext *s, uint16_t insn)
123 #define DISAS_INSN(name) \
124 static void disas_##name (DisasContext *s, uint16_t insn)
127 /* Generate a load from the specified address. Narrow values are
128 sign extended to full register width. */
129 static inline int gen_load(DisasContext * s, int opsize, int addr, int sign)
134 tmp = gen_new_qreg(QMODE_I32);
136 gen_ld(s, 8s32, tmp, addr);
138 gen_ld(s, 8u32, tmp, addr);
141 tmp = gen_new_qreg(QMODE_I32);
143 gen_ld(s, 16s32, tmp, addr);
145 gen_ld(s, 16u32, tmp, addr);
148 tmp = gen_new_qreg(QMODE_I32);
149 gen_ld(s, 32, tmp, addr);
152 tmp = gen_new_qreg(QMODE_F32);
153 gen_ld(s, f32, tmp, addr);
156 tmp = gen_new_qreg(QMODE_F64);
157 gen_ld(s, f64, tmp, addr);
160 qemu_assert(0, "bad load size");
162 gen_throws_exception = gen_last_qop;
166 /* Generate a store. */
167 static inline void gen_store(DisasContext *s, int opsize, int addr, int val)
171 gen_st(s, 8, addr, val);
174 gen_st(s, 16, addr, val);
177 gen_st(s, 32, addr, val);
180 gen_st(s, f32, addr, val);
183 gen_st(s, f64, addr, val);
186 qemu_assert(0, "bad store size");
188 gen_throws_exception = gen_last_qop;
191 /* Generate an unsigned load if VAL is 0 a signed load if val is -1,
192 otherwise generate a store. */
193 static int gen_ldst(DisasContext *s, int opsize, int addr, int val)
196 gen_store(s, opsize, addr, val);
199 return gen_load(s, opsize, addr, val != 0);
203 /* Read a 32-bit immediate constant. */
204 static inline uint32_t read_im32(DisasContext *s)
207 im = ((uint32_t)lduw_code(s->pc)) << 16;
209 im |= lduw_code(s->pc);
214 /* Calculate and address index. */
215 static int gen_addr_index(uint16_t ext, int tmp)
220 add = (ext & 0x8000) ? AREG(ext, 12) : DREG(ext, 12);
221 if ((ext & 0x800) == 0) {
222 gen_op_ext16s32(tmp, add);
225 scale = (ext >> 9) & 3;
227 gen_op_shl32(tmp, add, gen_im32(scale));
233 /* Handle a base + index + displacement effective addresss. A base of
234 -1 means pc-relative. */
235 static int gen_lea_indexed(DisasContext *s, int opsize, int base)
244 ext = lduw_code(s->pc);
247 if ((ext & 0x800) == 0 && !m68k_feature(s->env, M68K_FEATURE_WORD_INDEX))
251 /* full extension word format */
252 if (!m68k_feature(s->env, M68K_FEATURE_EXT_FULL))
255 if ((ext & 0x30) > 0x10) {
256 /* base displacement */
257 if ((ext & 0x30) == 0x20) {
258 bd = (int16_t)lduw_code(s->pc);
266 tmp = gen_new_qreg(QMODE_I32);
267 if ((ext & 0x44) == 0) {
269 add = gen_addr_index(ext, tmp);
273 if ((ext & 0x80) == 0) {
274 /* base not suppressed */
276 base = gen_im32(offset + bd);
280 gen_op_add32(tmp, add, base);
288 gen_op_add32(tmp, add, gen_im32(bd));
294 if ((ext & 3) != 0) {
295 /* memory indirect */
296 base = gen_load(s, OS_LONG, add, 0);
297 if ((ext & 0x44) == 4) {
298 add = gen_addr_index(ext, tmp);
299 gen_op_add32(tmp, add, base);
305 /* outer displacement */
306 if ((ext & 3) == 2) {
307 od = (int16_t)lduw_code(s->pc);
316 gen_op_add32(tmp, add, gen_im32(od));
321 /* brief extension word format */
322 tmp = gen_new_qreg(QMODE_I32);
323 add = gen_addr_index(ext, tmp);
325 gen_op_add32(tmp, add, base);
327 gen_op_add32(tmp, tmp, gen_im32((int8_t)ext));
329 gen_op_add32(tmp, add, gen_im32(offset + (int8_t)ext));
336 /* Update the CPU env CC_OP state. */
337 static inline void gen_flush_cc_op(DisasContext *s)
339 if (s->cc_op != CC_OP_DYNAMIC)
340 gen_op_mov32(QREG_CC_OP, gen_im32(s->cc_op));
343 /* Evaluate all the CC flags. */
344 static inline void gen_flush_flags(DisasContext *s)
346 if (s->cc_op == CC_OP_FLAGS)
348 gen_op_flush_flags(s->cc_op);
349 s->cc_op = CC_OP_FLAGS;
352 static inline int opsize_bytes(int opsize)
355 case OS_BYTE: return 1;
356 case OS_WORD: return 2;
357 case OS_LONG: return 4;
358 case OS_SINGLE: return 4;
359 case OS_DOUBLE: return 8;
361 qemu_assert(0, "bad operand size");
365 /* Assign value to a register. If the width is less than the register width
366 only the low part of the register is set. */
367 static void gen_partset_reg(int opsize, int reg, int val)
372 gen_op_and32(reg, reg, gen_im32(0xffffff00));
373 tmp = gen_new_qreg(QMODE_I32);
374 gen_op_and32(tmp, val, gen_im32(0xff));
375 gen_op_or32(reg, reg, tmp);
378 gen_op_and32(reg, reg, gen_im32(0xffff0000));
379 tmp = gen_new_qreg(QMODE_I32);
380 gen_op_and32(tmp, val, gen_im32(0xffff));
381 gen_op_or32(reg, reg, tmp);
384 gen_op_mov32(reg, val);
387 gen_op_pack_32_f32(reg, val);
390 qemu_assert(0, "Bad operand size");
395 /* Sign or zero extend a value. */
396 static inline int gen_extend(int val, int opsize, int sign)
402 tmp = gen_new_qreg(QMODE_I32);
404 gen_op_ext8s32(tmp, val);
406 gen_op_ext8u32(tmp, val);
409 tmp = gen_new_qreg(QMODE_I32);
411 gen_op_ext16s32(tmp, val);
413 gen_op_ext16u32(tmp, val);
419 tmp = gen_new_qreg(QMODE_F32);
420 gen_op_pack_f32_32(tmp, val);
423 qemu_assert(0, "Bad operand size");
428 /* Generate code for an "effective address". Does not adjust the base
429 register for autoincrememnt addressing modes. */
430 static int gen_lea(DisasContext *s, uint16_t insn, int opsize)
438 switch ((insn >> 3) & 7) {
439 case 0: /* Data register direct. */
440 case 1: /* Address register direct. */
442 case 2: /* Indirect register */
443 case 3: /* Indirect postincrement. */
446 case 4: /* Indirect predecrememnt. */
448 tmp = gen_new_qreg(QMODE_I32);
449 gen_op_sub32(tmp, reg, gen_im32(opsize_bytes(opsize)));
451 case 5: /* Indirect displacement. */
453 tmp = gen_new_qreg(QMODE_I32);
454 ext = lduw_code(s->pc);
456 gen_op_add32(tmp, reg, gen_im32((int16_t)ext));
458 case 6: /* Indirect index + displacement. */
460 return gen_lea_indexed(s, opsize, reg);
463 case 0: /* Absolute short. */
464 offset = ldsw_code(s->pc);
466 return gen_im32(offset);
467 case 1: /* Absolute long. */
468 offset = read_im32(s);
469 return gen_im32(offset);
470 case 2: /* pc displacement */
471 tmp = gen_new_qreg(QMODE_I32);
473 offset += ldsw_code(s->pc);
475 return gen_im32(offset);
476 case 3: /* pc index+displacement. */
477 return gen_lea_indexed(s, opsize, -1);
478 case 4: /* Immediate. */
483 /* Should never happen. */
487 /* Helper function for gen_ea. Reuse the computed address between the
488 for read/write operands. */
489 static inline int gen_ea_once(DisasContext *s, uint16_t insn, int opsize,
494 if (addrp && val > 0) {
497 tmp = gen_lea(s, insn, opsize);
503 return gen_ldst(s, opsize, tmp, val);
506 /* Generate code to load/store a value ito/from an EA. If VAL > 0 this is
507 a write otherwise it is a read (0 == sign extend, -1 == zero extend).
508 ADDRP is non-null for readwrite operands. */
509 static int gen_ea(DisasContext *s, uint16_t insn, int opsize, int val,
517 switch ((insn >> 3) & 7) {
518 case 0: /* Data register direct. */
521 gen_partset_reg(opsize, reg, val);
524 return gen_extend(reg, opsize, val);
526 case 1: /* Address register direct. */
529 gen_op_mov32(reg, val);
532 return gen_extend(reg, opsize, val);
534 case 2: /* Indirect register */
536 return gen_ldst(s, opsize, reg, val);
537 case 3: /* Indirect postincrement. */
539 result = gen_ldst(s, opsize, reg, val);
540 /* ??? This is not exception safe. The instruction may still
541 fault after this point. */
542 if (val > 0 || !addrp)
543 gen_op_add32(reg, reg, gen_im32(opsize_bytes(opsize)));
545 case 4: /* Indirect predecrememnt. */
548 if (addrp && val > 0) {
551 tmp = gen_lea(s, insn, opsize);
557 result = gen_ldst(s, opsize, tmp, val);
558 /* ??? This is not exception safe. The instruction may still
559 fault after this point. */
560 if (val > 0 || !addrp) {
562 gen_op_mov32(reg, tmp);
566 case 5: /* Indirect displacement. */
567 case 6: /* Indirect index + displacement. */
568 return gen_ea_once(s, insn, opsize, val, addrp);
571 case 0: /* Absolute short. */
572 case 1: /* Absolute long. */
573 case 2: /* pc displacement */
574 case 3: /* pc index+displacement. */
575 return gen_ea_once(s, insn, opsize, val, addrp);
576 case 4: /* Immediate. */
577 /* Sign extend values for consistency. */
581 offset = ldsb_code(s->pc + 1);
583 offset = ldub_code(s->pc + 1);
588 offset = ldsw_code(s->pc);
590 offset = lduw_code(s->pc);
594 offset = read_im32(s);
597 qemu_assert(0, "Bad immediate operand");
599 return gen_im32(offset);
604 /* Should never happen. */
608 static void gen_logic_cc(DisasContext *s, int val)
610 gen_op_logic_cc(val);
611 s->cc_op = CC_OP_LOGIC;
614 static void gen_jmpcc(DisasContext *s, int cond, int l1)
625 case 2: /* HI (!C && !Z) */
626 tmp = gen_new_qreg(QMODE_I32);
627 gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_C | CCF_Z));
628 gen_op_jmp_z32(tmp, l1);
630 case 3: /* LS (C || Z) */
631 tmp = gen_new_qreg(QMODE_I32);
632 gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_C | CCF_Z));
633 gen_op_jmp_nz32(tmp, l1);
635 case 4: /* CC (!C) */
636 tmp = gen_new_qreg(QMODE_I32);
637 gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_C));
638 gen_op_jmp_z32(tmp, l1);
641 tmp = gen_new_qreg(QMODE_I32);
642 gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_C));
643 gen_op_jmp_nz32(tmp, l1);
645 case 6: /* NE (!Z) */
646 tmp = gen_new_qreg(QMODE_I32);
647 gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_Z));
648 gen_op_jmp_z32(tmp, l1);
651 tmp = gen_new_qreg(QMODE_I32);
652 gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_Z));
653 gen_op_jmp_nz32(tmp, l1);
655 case 8: /* VC (!V) */
656 tmp = gen_new_qreg(QMODE_I32);
657 gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_V));
658 gen_op_jmp_z32(tmp, l1);
661 tmp = gen_new_qreg(QMODE_I32);
662 gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_V));
663 gen_op_jmp_nz32(tmp, l1);
665 case 10: /* PL (!N) */
666 tmp = gen_new_qreg(QMODE_I32);
667 gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_N));
668 gen_op_jmp_z32(tmp, l1);
670 case 11: /* MI (N) */
671 tmp = gen_new_qreg(QMODE_I32);
672 gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_N));
673 gen_op_jmp_nz32(tmp, l1);
675 case 12: /* GE (!(N ^ V)) */
676 tmp = gen_new_qreg(QMODE_I32);
677 gen_op_shr32(tmp, QREG_CC_DEST, gen_im32(2));
678 gen_op_xor32(tmp, tmp, QREG_CC_DEST);
679 gen_op_and32(tmp, tmp, gen_im32(CCF_V));
680 gen_op_jmp_z32(tmp, l1);
682 case 13: /* LT (N ^ V) */
683 tmp = gen_new_qreg(QMODE_I32);
684 gen_op_shr32(tmp, QREG_CC_DEST, gen_im32(2));
685 gen_op_xor32(tmp, tmp, QREG_CC_DEST);
686 gen_op_and32(tmp, tmp, gen_im32(CCF_V));
687 gen_op_jmp_nz32(tmp, l1);
689 case 14: /* GT (!(Z || (N ^ V))) */
692 l2 = gen_new_label();
693 tmp = gen_new_qreg(QMODE_I32);
694 gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_Z));
695 gen_op_jmp_nz32(tmp, l2);
696 tmp = gen_new_qreg(QMODE_I32);
697 gen_op_shr32(tmp, QREG_CC_DEST, gen_im32(2));
698 gen_op_xor32(tmp, tmp, QREG_CC_DEST);
699 gen_op_and32(tmp, tmp, gen_im32(CCF_V));
700 gen_op_jmp_nz32(tmp, l2);
705 case 15: /* LE (Z || (N ^ V)) */
706 tmp = gen_new_qreg(QMODE_I32);
707 gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_Z));
708 gen_op_jmp_nz32(tmp, l1);
709 tmp = gen_new_qreg(QMODE_I32);
710 gen_op_shr32(tmp, QREG_CC_DEST, gen_im32(2));
711 gen_op_xor32(tmp, tmp, QREG_CC_DEST);
712 gen_op_and32(tmp, tmp, gen_im32(CCF_V));
713 gen_op_jmp_nz32(tmp, l1);
716 /* Should ever happen. */
727 l1 = gen_new_label();
728 cond = (insn >> 8) & 0xf;
730 gen_op_and32(reg, reg, gen_im32(0xffffff00));
731 gen_jmpcc(s, cond ^ 1, l1);
732 gen_op_or32(reg, reg, gen_im32(0xff));
736 /* Force a TB lookup after an instruction that changes the CPU state. */
737 static void gen_lookup_tb(DisasContext *s)
740 gen_op_mov32(QREG_PC, gen_im32(s->pc));
741 s->is_jmp = DISAS_UPDATE;
744 /* Generate a jump to to the address in qreg DEST. */
745 static void gen_jmp(DisasContext *s, int dest)
748 gen_op_mov32(QREG_PC, dest);
749 s->is_jmp = DISAS_JUMP;
752 static void gen_exception(DisasContext *s, uint32_t where, int nr)
755 gen_jmp(s, gen_im32(where));
756 gen_op_raise_exception(nr);
759 static inline void gen_addr_fault(DisasContext *s)
761 gen_exception(s, s->insn_pc, EXCP_ADDRESS);
764 #define SRC_EA(result, opsize, val, addrp) do { \
765 result = gen_ea(s, insn, opsize, val, addrp); \
766 if (result == -1) { \
772 #define DEST_EA(insn, opsize, val, addrp) do { \
773 int ea_result = gen_ea(s, insn, opsize, val, addrp); \
774 if (ea_result == -1) { \
780 /* Generate a jump to an immediate address. */
781 static void gen_jmp_tb(DisasContext *s, int n, uint32_t dest)
783 TranslationBlock *tb;
786 if (__builtin_expect (s->singlestep_enabled, 0)) {
787 gen_exception(s, dest, EXCP_DEBUG);
788 } else if ((tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK) ||
789 (s->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK)) {
790 gen_op_goto_tb(0, n, (long)tb);
791 gen_op_mov32(QREG_PC, gen_im32(dest));
792 gen_op_mov32(QREG_T0, gen_im32((long)tb + n));
795 gen_jmp(s, gen_im32(dest));
796 gen_op_mov32(QREG_T0, gen_im32(0));
799 s->is_jmp = DISAS_TB_JUMP;
802 DISAS_INSN(undef_mac)
804 gen_exception(s, s->pc - 2, EXCP_LINEA);
807 DISAS_INSN(undef_fpu)
809 gen_exception(s, s->pc - 2, EXCP_LINEF);
814 gen_exception(s, s->pc - 2, EXCP_UNSUPPORTED);
815 cpu_abort(cpu_single_env, "Illegal instruction: %04x @ %08x",
826 sign = (insn & 0x100) != 0;
828 tmp = gen_new_qreg(QMODE_I32);
830 gen_op_ext16s32(tmp, reg);
832 gen_op_ext16u32(tmp, reg);
833 SRC_EA(src, OS_WORD, sign ? -1 : 0, NULL);
834 gen_op_mul32(tmp, tmp, src);
835 gen_op_mov32(reg, tmp);
836 /* Unlike m68k, coldfire always clears the overflow bit. */
837 gen_logic_cc(s, tmp);
847 sign = (insn & 0x100) != 0;
850 gen_op_ext16s32(QREG_DIV1, reg);
852 gen_op_ext16u32(QREG_DIV1, reg);
854 SRC_EA(src, OS_WORD, sign ? -1 : 0, NULL);
855 gen_op_mov32(QREG_DIV2, src);
862 tmp = gen_new_qreg(QMODE_I32);
863 src = gen_new_qreg(QMODE_I32);
864 gen_op_ext16u32(tmp, QREG_DIV1);
865 gen_op_shl32(src, QREG_DIV2, gen_im32(16));
866 gen_op_or32(reg, tmp, src);
868 s->cc_op = CC_OP_FLAGS;
878 ext = lduw_code(s->pc);
881 gen_exception(s, s->pc - 4, EXCP_UNSUPPORTED);
886 gen_op_mov32(QREG_DIV1, num);
887 SRC_EA(den, OS_LONG, 0, NULL);
888 gen_op_mov32(QREG_DIV2, den);
896 gen_op_mov32 (reg, QREG_DIV1);
899 gen_op_mov32 (reg, QREG_DIV2);
902 s->cc_op = CC_OP_FLAGS;
914 add = (insn & 0x4000) != 0;
916 dest = gen_new_qreg(QMODE_I32);
918 SRC_EA(tmp, OS_LONG, 0, &addr);
922 SRC_EA(src, OS_LONG, 0, NULL);
925 gen_op_add32(dest, tmp, src);
926 gen_op_update_xflag_lt(dest, src);
927 s->cc_op = CC_OP_ADD;
929 gen_op_update_xflag_lt(tmp, src);
930 gen_op_sub32(dest, tmp, src);
931 s->cc_op = CC_OP_SUB;
933 gen_op_update_cc_add(dest, src);
935 DEST_EA(insn, OS_LONG, dest, &addr);
937 gen_op_mov32(reg, dest);
942 /* Reverse the order of the bits in REG. */
950 val = gen_new_qreg(QMODE_I32);
951 tmp1 = gen_new_qreg(QMODE_I32);
952 tmp2 = gen_new_qreg(QMODE_I32);
954 gen_op_mov32(val, reg);
955 /* Reverse bits within each nibble. */
956 gen_op_shl32(tmp1, val, gen_im32(3));
957 gen_op_and32(tmp1, tmp1, gen_im32(0x88888888));
958 gen_op_shl32(tmp2, val, gen_im32(1));
959 gen_op_and32(tmp2, tmp2, gen_im32(0x44444444));
960 gen_op_or32(tmp1, tmp1, tmp2);
961 gen_op_shr32(tmp2, val, gen_im32(1));
962 gen_op_and32(tmp2, tmp2, gen_im32(0x22222222));
963 gen_op_or32(tmp1, tmp1, tmp2);
964 gen_op_shr32(tmp2, val, gen_im32(3));
965 gen_op_and32(tmp2, tmp2, gen_im32(0x11111111));
966 gen_op_or32(tmp1, tmp1, tmp2);
967 /* Reverse nibbles withing bytes. */
968 gen_op_shl32(val, tmp1, gen_im32(4));
969 gen_op_and32(val, val, gen_im32(0xf0f0f0f0));
970 gen_op_shr32(tmp2, tmp1, gen_im32(4));
971 gen_op_and32(tmp2, tmp2, gen_im32(0x0f0f0f0f));
972 gen_op_or32(val, val, tmp2);
974 gen_op_bswap32(reg, val);
975 gen_op_mov32(reg, val);
978 DISAS_INSN(bitop_reg)
988 if ((insn & 0x38) != 0)
992 op = (insn >> 6) & 3;
993 SRC_EA(src1, opsize, 0, op ? &addr: NULL);
994 src2 = DREG(insn, 9);
995 dest = gen_new_qreg(QMODE_I32);
998 tmp = gen_new_qreg(QMODE_I32);
999 if (opsize == OS_BYTE)
1000 gen_op_and32(tmp, src2, gen_im32(7));
1002 gen_op_and32(tmp, src2, gen_im32(31));
1004 tmp = gen_new_qreg(QMODE_I32);
1005 gen_op_shl32(tmp, gen_im32(1), src2);
1007 gen_op_btest(src1, tmp);
1010 gen_op_xor32(dest, src1, tmp);
1013 gen_op_not32(tmp, tmp);
1014 gen_op_and32(dest, src1, tmp);
1017 gen_op_or32(dest, src1, tmp);
1023 DEST_EA(insn, opsize, dest, &addr);
1032 reg = DREG(insn, 0);
1033 tmp = gen_new_qreg(QMODE_I32);
1035 gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_V));
1036 l1 = gen_new_label();
1037 gen_op_jmp_z32(tmp, l1);
1038 tmp = gen_new_qreg(QMODE_I32);
1039 gen_op_shr32(tmp, reg, gen_im32(31));
1040 gen_op_xor32(tmp, tmp, gen_im32(0x80000000));
1041 gen_op_mov32(reg, tmp);
1043 gen_logic_cc(s, tmp);
1046 static void gen_push(DisasContext *s, int val)
1050 tmp = gen_new_qreg(QMODE_I32);
1051 gen_op_sub32(tmp, QREG_SP, gen_im32(4));
1052 gen_store(s, OS_LONG, tmp, val);
1053 gen_op_mov32(QREG_SP, tmp);
1065 mask = lduw_code(s->pc);
1067 tmp = gen_lea(s, insn, OS_LONG);
1072 addr = gen_new_qreg(QMODE_I32);
1073 gen_op_mov32(addr, tmp);
1074 is_load = ((insn & 0x0400) != 0);
1075 for (i = 0; i < 16; i++, mask >>= 1) {
1082 tmp = gen_load(s, OS_LONG, addr, 0);
1083 gen_op_mov32(reg, tmp);
1085 gen_store(s, OS_LONG, addr, reg);
1088 gen_op_add32(addr, addr, gen_im32(4));
1093 DISAS_INSN(bitop_im)
1104 if ((insn & 0x38) != 0)
1108 op = (insn >> 6) & 3;
1110 bitnum = lduw_code(s->pc);
1112 if (bitnum & 0xff00) {
1113 disas_undef(s, insn);
1117 SRC_EA(src1, opsize, 0, op ? &addr: NULL);
1120 tmp = gen_new_qreg(QMODE_I32);
1121 if (opsize == OS_BYTE)
1127 gen_op_btest(src1, gen_im32(mask));
1129 dest = gen_new_qreg(QMODE_I32);
1135 gen_op_xor32(dest, src1, gen_im32(mask));
1138 gen_op_and32(dest, src1, gen_im32(~mask));
1141 gen_op_or32(dest, src1, gen_im32(mask));
1147 DEST_EA(insn, opsize, dest, &addr);
1150 DISAS_INSN(arith_im)
1158 op = (insn >> 9) & 7;
1159 SRC_EA(src1, OS_LONG, 0, (op == 6) ? NULL : &addr);
1160 src2 = gen_im32(read_im32(s));
1161 dest = gen_new_qreg(QMODE_I32);
1164 gen_op_or32(dest, src1, src2);
1165 gen_logic_cc(s, dest);
1168 gen_op_and32(dest, src1, src2);
1169 gen_logic_cc(s, dest);
1172 gen_op_mov32(dest, src1);
1173 gen_op_update_xflag_lt(dest, src2);
1174 gen_op_sub32(dest, dest, src2);
1175 gen_op_update_cc_add(dest, src2);
1176 s->cc_op = CC_OP_SUB;
1179 gen_op_mov32(dest, src1);
1180 gen_op_add32(dest, dest, src2);
1181 gen_op_update_cc_add(dest, src2);
1182 gen_op_update_xflag_lt(dest, src2);
1183 s->cc_op = CC_OP_ADD;
1186 gen_op_xor32(dest, src1, src2);
1187 gen_logic_cc(s, dest);
1190 gen_op_mov32(dest, src1);
1191 gen_op_sub32(dest, dest, src2);
1192 gen_op_update_cc_add(dest, src2);
1193 s->cc_op = CC_OP_SUB;
1199 DEST_EA(insn, OS_LONG, dest, &addr);
1207 reg = DREG(insn, 0);
1208 gen_op_bswap32(reg, reg);
1218 switch (insn >> 12) {
1219 case 1: /* move.b */
1222 case 2: /* move.l */
1225 case 3: /* move.w */
1231 SRC_EA(src, opsize, -1, NULL);
1232 op = (insn >> 6) & 7;
1235 /* The value will already have been sign extended. */
1236 dest = AREG(insn, 9);
1237 gen_op_mov32(dest, src);
1241 dest_ea = ((insn >> 9) & 7) | (op << 3);
1242 DEST_EA(dest_ea, opsize, src, NULL);
1243 /* This will be correct because loads sign extend. */
1244 gen_logic_cc(s, src);
1255 reg = DREG(insn, 0);
1256 dest = gen_new_qreg(QMODE_I32);
1257 gen_op_mov32 (dest, gen_im32(0));
1258 gen_op_subx_cc(dest, reg);
1260 tmp = gen_new_qreg(QMODE_I32);
1261 gen_op_mov32 (tmp, QREG_CC_DEST);
1262 gen_op_update_cc_add(dest, reg);
1263 gen_op_mov32(reg, dest);
1264 s->cc_op = CC_OP_DYNAMIC;
1266 gen_op_or32(tmp, tmp, gen_im32(~CCF_Z));
1267 gen_op_and32(QREG_CC_DEST, QREG_CC_DEST, tmp);
1268 s->cc_op = CC_OP_FLAGS;
1276 reg = AREG(insn, 9);
1277 tmp = gen_lea(s, insn, OS_LONG);
1282 gen_op_mov32(reg, tmp);
1289 switch ((insn >> 6) & 3) {
1302 DEST_EA(insn, opsize, gen_im32(0), NULL);
1303 gen_logic_cc(s, gen_im32(0));
1306 static int gen_get_ccr(DisasContext *s)
1311 dest = gen_new_qreg(QMODE_I32);
1312 gen_op_get_xflag(dest);
1313 gen_op_shl32(dest, dest, gen_im32(4));
1314 gen_op_or32(dest, dest, QREG_CC_DEST);
1318 DISAS_INSN(move_from_ccr)
1323 ccr = gen_get_ccr(s);
1324 reg = DREG(insn, 0);
1325 gen_partset_reg(OS_WORD, reg, ccr);
1333 reg = DREG(insn, 0);
1334 src1 = gen_new_qreg(QMODE_I32);
1335 gen_op_mov32(src1, reg);
1336 gen_op_neg32(reg, src1);
1337 s->cc_op = CC_OP_SUB;
1338 gen_op_update_cc_add(reg, src1);
1339 gen_op_update_xflag_lt(gen_im32(0), src1);
1340 s->cc_op = CC_OP_SUB;
1343 static void gen_set_sr_im(DisasContext *s, uint16_t val, int ccr_only)
1345 gen_op_logic_cc(gen_im32(val & 0xf));
1346 gen_op_update_xflag_tst(gen_im32((val & 0x10) >> 4));
1348 gen_op_mov32(QREG_SR, gen_im32(val & 0xff00));
1352 static void gen_set_sr(DisasContext *s, uint16_t insn, int ccr_only)
1357 s->cc_op = CC_OP_FLAGS;
1358 if ((insn & 0x38) == 0)
1360 src1 = gen_new_qreg(QMODE_I32);
1361 reg = DREG(insn, 0);
1362 gen_op_and32(src1, reg, gen_im32(0xf));
1363 gen_op_logic_cc(src1);
1364 gen_op_shr32(src1, reg, gen_im32(4));
1365 gen_op_and32(src1, src1, gen_im32(1));
1366 gen_op_update_xflag_tst(src1);
1368 gen_op_and32(QREG_SR, reg, gen_im32(0xff00));
1371 else if ((insn & 0x3f) == 0x3c)
1374 val = lduw_code(s->pc);
1376 gen_set_sr_im(s, val, ccr_only);
1379 disas_undef(s, insn);
1382 DISAS_INSN(move_to_ccr)
1384 gen_set_sr(s, insn, 1);
1391 reg = DREG(insn, 0);
1392 gen_op_not32(reg, reg);
1393 gen_logic_cc(s, reg);
1403 dest = gen_new_qreg(QMODE_I32);
1404 src1 = gen_new_qreg(QMODE_I32);
1405 src2 = gen_new_qreg(QMODE_I32);
1406 reg = DREG(insn, 0);
1407 gen_op_shl32(src1, reg, gen_im32(16));
1408 gen_op_shr32(src2, reg, gen_im32(16));
1409 gen_op_or32(dest, src1, src2);
1410 gen_op_mov32(reg, dest);
1411 gen_logic_cc(s, dest);
1418 tmp = gen_lea(s, insn, OS_LONG);
1432 reg = DREG(insn, 0);
1433 op = (insn >> 6) & 7;
1434 tmp = gen_new_qreg(QMODE_I32);
1436 gen_op_ext16s32(tmp, reg);
1438 gen_op_ext8s32(tmp, reg);
1440 gen_partset_reg(OS_WORD, reg, tmp);
1442 gen_op_mov32(reg, tmp);
1443 gen_logic_cc(s, tmp);
1451 switch ((insn >> 6) & 3) {
1464 SRC_EA(tmp, opsize, -1, NULL);
1465 gen_logic_cc(s, tmp);
1470 /* Implemented as a NOP. */
1475 gen_exception(s, s->pc - 2, EXCP_ILLEGAL);
1478 /* ??? This should be atomic. */
1485 dest = gen_new_qreg(QMODE_I32);
1486 SRC_EA(src1, OS_BYTE, -1, &addr);
1487 gen_logic_cc(s, src1);
1488 gen_op_or32(dest, src1, gen_im32(0x80));
1489 DEST_EA(insn, OS_BYTE, dest, &addr);
1499 /* The upper 32 bits of the product are discarded, so
1500 muls.l and mulu.l are functionally equivalent. */
1501 ext = lduw_code(s->pc);
1504 gen_exception(s, s->pc - 4, EXCP_UNSUPPORTED);
1507 reg = DREG(ext, 12);
1508 SRC_EA(src1, OS_LONG, 0, NULL);
1509 dest = gen_new_qreg(QMODE_I32);
1510 gen_op_mul32(dest, src1, reg);
1511 gen_op_mov32(reg, dest);
1512 /* Unlike m68k, coldfire always clears the overflow bit. */
1513 gen_logic_cc(s, dest);
1522 offset = ldsw_code(s->pc);
1524 reg = AREG(insn, 0);
1525 tmp = gen_new_qreg(QMODE_I32);
1526 gen_op_sub32(tmp, QREG_SP, gen_im32(4));
1527 gen_store(s, OS_LONG, tmp, reg);
1529 gen_op_mov32(reg, tmp);
1530 gen_op_add32(QREG_SP, tmp, gen_im32(offset));
1539 src = gen_new_qreg(QMODE_I32);
1540 reg = AREG(insn, 0);
1541 gen_op_mov32(src, reg);
1542 tmp = gen_load(s, OS_LONG, src, 0);
1543 gen_op_mov32(reg, tmp);
1544 gen_op_add32(QREG_SP, src, gen_im32(4));
1555 tmp = gen_load(s, OS_LONG, QREG_SP, 0);
1556 gen_op_add32(QREG_SP, QREG_SP, gen_im32(4));
1564 /* Load the target address first to ensure correct exception
1566 tmp = gen_lea(s, insn, OS_LONG);
1571 if ((insn & 0x40) == 0) {
1573 gen_push(s, gen_im32(s->pc));
1586 SRC_EA(src1, OS_LONG, 0, &addr);
1587 val = (insn >> 9) & 7;
1590 src2 = gen_im32(val);
1591 dest = gen_new_qreg(QMODE_I32);
1592 gen_op_mov32(dest, src1);
1593 if ((insn & 0x38) == 0x08) {
1594 /* Don't update condition codes if the destination is an
1595 address register. */
1596 if (insn & 0x0100) {
1597 gen_op_sub32(dest, dest, src2);
1599 gen_op_add32(dest, dest, src2);
1602 if (insn & 0x0100) {
1603 gen_op_update_xflag_lt(dest, src2);
1604 gen_op_sub32(dest, dest, src2);
1605 s->cc_op = CC_OP_SUB;
1607 gen_op_add32(dest, dest, src2);
1608 gen_op_update_xflag_lt(dest, src2);
1609 s->cc_op = CC_OP_ADD;
1611 gen_op_update_cc_add(dest, src2);
1613 DEST_EA(insn, OS_LONG, dest, &addr);
1619 case 2: /* One extension word. */
1622 case 3: /* Two extension words. */
1625 case 4: /* No extension words. */
1628 disas_undef(s, insn);
1640 op = (insn >> 8) & 0xf;
1641 offset = (int8_t)insn;
1643 offset = ldsw_code(s->pc);
1645 } else if (offset == -1) {
1646 offset = read_im32(s);
1650 gen_push(s, gen_im32(s->pc));
1655 l1 = gen_new_label();
1656 gen_jmpcc(s, ((insn >> 8) & 0xf) ^ 1, l1);
1657 gen_jmp_tb(s, 1, base + offset);
1659 gen_jmp_tb(s, 0, s->pc);
1661 /* Unconditional branch. */
1662 gen_jmp_tb(s, 0, base + offset);
1670 tmp = gen_im32((int8_t)insn);
1671 gen_op_mov32(DREG(insn, 9), tmp);
1672 gen_logic_cc(s, tmp);
1685 SRC_EA(src, opsize, (insn & 0x80) ? 0 : -1, NULL);
1686 reg = DREG(insn, 9);
1687 gen_op_mov32(reg, src);
1688 gen_logic_cc(s, src);
1698 reg = DREG(insn, 9);
1699 dest = gen_new_qreg(QMODE_I32);
1701 SRC_EA(src, OS_LONG, 0, &addr);
1702 gen_op_or32(dest, src, reg);
1703 DEST_EA(insn, OS_LONG, dest, &addr);
1705 SRC_EA(src, OS_LONG, 0, NULL);
1706 gen_op_or32(dest, src, reg);
1707 gen_op_mov32(reg, dest);
1709 gen_logic_cc(s, dest);
1717 SRC_EA(src, OS_LONG, 0, NULL);
1718 reg = AREG(insn, 9);
1719 gen_op_sub32(reg, reg, src);
1730 reg = DREG(insn, 9);
1731 src = DREG(insn, 0);
1732 dest = gen_new_qreg(QMODE_I32);
1733 gen_op_mov32 (dest, reg);
1734 gen_op_subx_cc(dest, src);
1736 tmp = gen_new_qreg(QMODE_I32);
1737 gen_op_mov32 (tmp, QREG_CC_DEST);
1738 gen_op_update_cc_add(dest, src);
1739 gen_op_mov32(reg, dest);
1740 s->cc_op = CC_OP_DYNAMIC;
1742 gen_op_or32(tmp, tmp, gen_im32(~CCF_Z));
1743 gen_op_and32(QREG_CC_DEST, QREG_CC_DEST, tmp);
1744 s->cc_op = CC_OP_FLAGS;
1752 val = (insn >> 9) & 7;
1755 src = gen_im32(val);
1756 gen_logic_cc(s, src);
1757 DEST_EA(insn, OS_LONG, src, NULL);
1768 op = (insn >> 6) & 3;
1772 s->cc_op = CC_OP_CMPB;
1776 s->cc_op = CC_OP_CMPW;
1780 s->cc_op = CC_OP_SUB;
1785 SRC_EA(src, opsize, -1, NULL);
1786 reg = DREG(insn, 9);
1787 dest = gen_new_qreg(QMODE_I32);
1788 gen_op_sub32(dest, reg, src);
1789 gen_op_update_cc_add(dest, src);
1804 SRC_EA(src, opsize, -1, NULL);
1805 reg = AREG(insn, 9);
1806 dest = gen_new_qreg(QMODE_I32);
1807 gen_op_sub32(dest, reg, src);
1808 gen_op_update_cc_add(dest, src);
1809 s->cc_op = CC_OP_SUB;
1819 SRC_EA(src, OS_LONG, 0, &addr);
1820 reg = DREG(insn, 9);
1821 dest = gen_new_qreg(QMODE_I32);
1822 gen_op_xor32(dest, src, reg);
1823 gen_logic_cc(s, dest);
1824 DEST_EA(insn, OS_LONG, dest, &addr);
1834 reg = DREG(insn, 9);
1835 dest = gen_new_qreg(QMODE_I32);
1837 SRC_EA(src, OS_LONG, 0, &addr);
1838 gen_op_and32(dest, src, reg);
1839 DEST_EA(insn, OS_LONG, dest, &addr);
1841 SRC_EA(src, OS_LONG, 0, NULL);
1842 gen_op_and32(dest, src, reg);
1843 gen_op_mov32(reg, dest);
1845 gen_logic_cc(s, dest);
1853 SRC_EA(src, OS_LONG, 0, NULL);
1854 reg = AREG(insn, 9);
1855 gen_op_add32(reg, reg, src);
1866 reg = DREG(insn, 9);
1867 src = DREG(insn, 0);
1868 dest = gen_new_qreg(QMODE_I32);
1869 gen_op_mov32 (dest, reg);
1870 gen_op_addx_cc(dest, src);
1872 tmp = gen_new_qreg(QMODE_I32);
1873 gen_op_mov32 (tmp, QREG_CC_DEST);
1874 gen_op_update_cc_add(dest, src);
1875 gen_op_mov32(reg, dest);
1876 s->cc_op = CC_OP_DYNAMIC;
1878 gen_op_or32(tmp, tmp, gen_im32(~CCF_Z));
1879 gen_op_and32(QREG_CC_DEST, QREG_CC_DEST, tmp);
1880 s->cc_op = CC_OP_FLAGS;
1883 DISAS_INSN(shift_im)
1888 reg = DREG(insn, 0);
1889 tmp = (insn >> 9) & 7;
1893 gen_op_shl_im_cc(reg, tmp);
1894 s->cc_op = CC_OP_SHL;
1897 gen_op_shr_im_cc(reg, tmp);
1898 s->cc_op = CC_OP_SHR;
1900 gen_op_sar_im_cc(reg, tmp);
1901 s->cc_op = CC_OP_SAR;
1906 DISAS_INSN(shift_reg)
1912 reg = DREG(insn, 0);
1913 src = DREG(insn, 9);
1914 tmp = gen_new_qreg(QMODE_I32);
1915 gen_op_and32(tmp, src, gen_im32(63));
1917 gen_op_shl_cc(reg, tmp);
1918 s->cc_op = CC_OP_SHL;
1921 gen_op_shr_cc(reg, tmp);
1922 s->cc_op = CC_OP_SHR;
1924 gen_op_sar_cc(reg, tmp);
1925 s->cc_op = CC_OP_SAR;
1933 reg = DREG(insn, 0);
1934 gen_logic_cc(s, reg);
1935 gen_op_ff1(reg, reg);
1938 static int gen_get_sr(DisasContext *s)
1943 ccr = gen_get_ccr(s);
1944 sr = gen_new_qreg(QMODE_I32);
1945 gen_op_and32(sr, QREG_SR, gen_im32(0xffe0));
1946 gen_op_or32(sr, sr, ccr);
1956 ext = lduw_code(s->pc);
1958 if (ext != 0x46FC) {
1959 gen_exception(s, addr, EXCP_UNSUPPORTED);
1962 ext = lduw_code(s->pc);
1964 if (IS_USER(s) || (ext & SR_S) == 0) {
1965 gen_exception(s, addr, EXCP_PRIVILEGE);
1968 gen_push(s, gen_get_sr(s));
1969 gen_set_sr_im(s, ext, 0);
1972 DISAS_INSN(move_from_sr)
1978 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
1982 reg = DREG(insn, 0);
1983 gen_partset_reg(OS_WORD, reg, sr);
1986 DISAS_INSN(move_to_sr)
1989 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
1992 gen_set_sr(s, insn, 0);
1996 DISAS_INSN(move_from_usp)
1999 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2002 /* TODO: Implement USP. */
2003 gen_exception(s, s->pc - 2, EXCP_ILLEGAL);
2006 DISAS_INSN(move_to_usp)
2009 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2012 /* TODO: Implement USP. */
2013 gen_exception(s, s->pc - 2, EXCP_ILLEGAL);
2018 gen_jmp(s, gen_im32(s->pc));
2027 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2031 ext = lduw_code(s->pc);
2034 gen_set_sr_im(s, ext, 0);
2035 gen_jmp(s, gen_im32(s->pc));
2042 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2045 gen_exception(s, s->pc - 2, EXCP_RTE);
2054 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2058 ext = lduw_code(s->pc);
2062 reg = AREG(ext, 12);
2064 reg = DREG(ext, 12);
2066 gen_op_movec(gen_im32(ext & 0xfff), reg);
2073 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2076 /* ICache fetch. Implement as no-op. */
2082 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2085 /* Cache push/invalidate. Implement as no-op. */
2090 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2096 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2099 /* TODO: Implement wdebug. */
2100 qemu_assert(0, "WDEBUG not implemented");
2105 gen_exception(s, s->pc - 2, EXCP_TRAP0 + (insn & 0xf));
2108 /* ??? FP exceptions are not implemented. Most exceptions are deferred until
2109 immediately before the next FP instruction is executed. */
2120 ext = lduw_code(s->pc);
2122 opmode = ext & 0x7f;
2123 switch ((ext >> 13) & 7) {
2128 case 3: /* fmove out */
2131 /* ??? TODO: Proper behavior on overflow. */
2132 switch ((ext >> 10) & 7) {
2135 res = gen_new_qreg(QMODE_I32);
2136 gen_op_f64_to_i32(res, src);
2140 res = gen_new_qreg(QMODE_F32);
2141 gen_op_f64_to_f32(res, src);
2145 res = gen_new_qreg(QMODE_I32);
2146 gen_op_f64_to_i32(res, src);
2154 res = gen_new_qreg(QMODE_I32);
2155 gen_op_f64_to_i32(res, src);
2160 DEST_EA(insn, opsize, res, NULL);
2162 case 4: /* fmove to control register. */
2163 switch ((ext >> 10) & 7) {
2165 /* Not implemented. Ignore writes. */
2170 cpu_abort(NULL, "Unimplemented: fmove to control %d",
2174 case 5: /* fmove from control register. */
2175 switch ((ext >> 10) & 7) {
2177 /* Not implemented. Always return zero. */
2183 cpu_abort(NULL, "Unimplemented: fmove from control %d",
2187 DEST_EA(insn, OS_LONG, res, NULL);
2189 case 6: /* fmovem */
2194 if ((ext & 0x1f00) != 0x1000 || (ext & 0xff) == 0)
2196 src = gen_lea(s, insn, OS_LONG);
2201 addr = gen_new_qreg(QMODE_I32);
2202 gen_op_mov32(addr, src);
2207 if (ext & (1 << 13)) {
2209 gen_st(s, f64, addr, dest);
2212 gen_ld(s, f64, dest, addr);
2214 if (ext & (mask - 1))
2215 gen_op_add32(addr, addr, gen_im32(8));
2223 if (ext & (1 << 14)) {
2226 /* Source effective address. */
2227 switch ((ext >> 10) & 7) {
2228 case 0: opsize = OS_LONG; break;
2229 case 1: opsize = OS_SINGLE; break;
2230 case 4: opsize = OS_WORD; break;
2231 case 5: opsize = OS_DOUBLE; break;
2232 case 6: opsize = OS_BYTE; break;
2236 SRC_EA(tmp, opsize, -1, NULL);
2237 if (opsize == OS_DOUBLE) {
2240 src = gen_new_qreg(QMODE_F64);
2245 gen_op_i32_to_f64(src, tmp);
2248 gen_op_f32_to_f64(src, tmp);
2253 /* Source register. */
2254 src = FREG(ext, 10);
2256 dest = FREG(ext, 7);
2257 res = gen_new_qreg(QMODE_F64);
2259 gen_op_movf64(res, dest);
2262 case 0: case 0x40: case 0x44: /* fmove */
2263 gen_op_movf64(res, src);
2266 gen_op_iround_f64(res, src);
2269 case 3: /* fintrz */
2270 gen_op_itrunc_f64(res, src);
2273 case 4: case 0x41: case 0x45: /* fsqrt */
2274 gen_op_sqrtf64(res, src);
2276 case 0x18: case 0x58: case 0x5c: /* fabs */
2277 gen_op_absf64(res, src);
2279 case 0x1a: case 0x5a: case 0x5e: /* fneg */
2280 gen_op_chsf64(res, src);
2282 case 0x20: case 0x60: case 0x64: /* fdiv */
2283 gen_op_divf64(res, res, src);
2285 case 0x22: case 0x62: case 0x66: /* fadd */
2286 gen_op_addf64(res, res, src);
2288 case 0x23: case 0x63: case 0x67: /* fmul */
2289 gen_op_mulf64(res, res, src);
2291 case 0x28: case 0x68: case 0x6c: /* fsub */
2292 gen_op_subf64(res, res, src);
2294 case 0x38: /* fcmp */
2295 gen_op_sub_cmpf64(res, res, src);
2299 case 0x3a: /* ftst */
2300 gen_op_movf64(res, src);
2308 if (opmode & 0x40) {
2309 if ((opmode & 0x4) != 0)
2311 } else if ((s->fpcr & M68K_FPCR_PREC) == 0) {
2318 tmp = gen_new_qreg(QMODE_F32);
2319 gen_op_f64_to_f32(tmp, res);
2320 gen_op_f32_to_f64(res, tmp);
2322 gen_op_fp_result(res);
2324 gen_op_movf64(dest, res);
2329 disas_undef_fpu(s, insn);
2341 offset = ldsw_code(s->pc);
2343 if (insn & (1 << 6)) {
2344 offset = (offset << 16) | lduw_code(s->pc);
2348 l1 = gen_new_label();
2349 /* TODO: Raise BSUN exception. */
2350 flag = gen_new_qreg(QMODE_I32);
2351 zero = gen_new_qreg(QMODE_F64);
2352 gen_op_zerof64(zero);
2353 gen_op_compare_quietf64(flag, QREG_FP_RESULT, zero);
2354 /* Jump to l1 if condition is true. */
2355 switch (insn & 0xf) {
2358 case 1: /* eq (=0) */
2359 gen_op_jmp_z32(flag, l1);
2361 case 2: /* ogt (=1) */
2362 gen_op_sub32(flag, flag, gen_im32(1));
2363 gen_op_jmp_z32(flag, l1);
2365 case 3: /* oge (=0 or =1) */
2366 gen_op_jmp_z32(flag, l1);
2367 gen_op_sub32(flag, flag, gen_im32(1));
2368 gen_op_jmp_z32(flag, l1);
2370 case 4: /* olt (=-1) */
2371 gen_op_jmp_s32(flag, l1);
2373 case 5: /* ole (=-1 or =0) */
2374 gen_op_jmp_s32(flag, l1);
2375 gen_op_jmp_z32(flag, l1);
2377 case 6: /* ogl (=-1 or =1) */
2378 gen_op_jmp_s32(flag, l1);
2379 gen_op_sub32(flag, flag, gen_im32(1));
2380 gen_op_jmp_z32(flag, l1);
2382 case 7: /* or (=2) */
2383 gen_op_sub32(flag, flag, gen_im32(2));
2384 gen_op_jmp_z32(flag, l1);
2386 case 8: /* un (<2) */
2387 gen_op_sub32(flag, flag, gen_im32(2));
2388 gen_op_jmp_s32(flag, l1);
2390 case 9: /* ueq (=0 or =2) */
2391 gen_op_jmp_z32(flag, l1);
2392 gen_op_sub32(flag, flag, gen_im32(2));
2393 gen_op_jmp_z32(flag, l1);
2395 case 10: /* ugt (>0) */
2396 /* ??? Add jmp_gtu. */
2397 gen_op_sub32(flag, flag, gen_im32(1));
2398 gen_op_jmp_ns32(flag, l1);
2400 case 11: /* uge (>=0) */
2401 gen_op_jmp_ns32(flag, l1);
2403 case 12: /* ult (=-1 or =2) */
2404 gen_op_jmp_s32(flag, l1);
2405 gen_op_sub32(flag, flag, gen_im32(2));
2406 gen_op_jmp_z32(flag, l1);
2408 case 13: /* ule (!=1) */
2409 gen_op_sub32(flag, flag, gen_im32(1));
2410 gen_op_jmp_nz32(flag, l1);
2412 case 14: /* ne (!=0) */
2413 gen_op_jmp_nz32(flag, l1);
2416 gen_op_mov32(flag, gen_im32(1));
2419 gen_jmp_tb(s, 0, s->pc);
2421 gen_jmp_tb(s, 1, addr + offset);
2424 DISAS_INSN(frestore)
2426 /* TODO: Implement frestore. */
2427 qemu_assert(0, "FRESTORE not implemented");
2432 /* TODO: Implement fsave. */
2433 qemu_assert(0, "FSAVE not implemented");
2436 static inline int gen_mac_extract_word(DisasContext *s, int val, int upper)
2438 int tmp = gen_new_qreg(QMODE_I32);
2439 if (s->env->macsr & MACSR_FI) {
2441 gen_op_and32(tmp, val, gen_im32(0xffff0000));
2443 gen_op_shl32(tmp, val, gen_im32(16));
2444 } else if (s->env->macsr & MACSR_SU) {
2446 gen_op_sar32(tmp, val, gen_im32(16));
2448 gen_op_ext16s32(tmp, val);
2451 gen_op_shr32(tmp, val, gen_im32(16));
2453 gen_op_ext16u32(tmp, val);
2469 int saved_flags = -1;
2471 ext = lduw_code(s->pc);
2474 acc = ((insn >> 7) & 1) | ((ext >> 3) & 2);
2475 dual = ((insn & 0x30) != 0 && (ext & 3) != 0);
2477 /* MAC with load. */
2478 tmp = gen_lea(s, insn, OS_LONG);
2479 addr = gen_new_qreg(QMODE_I32);
2480 gen_op_and32(addr, tmp, QREG_MAC_MASK);
2481 /* Load the value now to ensure correct exception behavior.
2482 Perform writeback after reading the MAC inputs. */
2483 loadval = gen_load(s, OS_LONG, addr, 0);
2486 rx = (ext & 0x8000) ? AREG(ext, 12) : DREG(insn, 12);
2487 ry = (ext & 8) ? AREG(ext, 0) : DREG(ext, 0);
2489 loadval = addr = -1;
2490 rx = (insn & 0x40) ? AREG(insn, 9) : DREG(insn, 9);
2491 ry = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
2494 gen_op_mac_clear_flags();
2496 if ((s->env->macsr & MACSR_OMC) != 0 && !dual) {
2497 /* Skip the multiply if we know we will ignore it. */
2498 l1 = gen_new_label();
2499 tmp = gen_new_qreg(QMODE_I32);
2500 gen_op_and32(tmp, QREG_MACSR, gen_im32(1 << (acc + 8)));
2501 gen_op_jmp_nz32(tmp, l1);
2504 if ((ext & 0x0800) == 0) {
2506 rx = gen_mac_extract_word(s, rx, (ext & 0x80) != 0);
2507 ry = gen_mac_extract_word(s, ry, (ext & 0x40) != 0);
2509 if (s->env->macsr & MACSR_FI) {
2510 gen_op_macmulf(rx, ry);
2512 if (s->env->macsr & MACSR_SU)
2513 gen_op_macmuls(rx, ry);
2515 gen_op_macmulu(rx, ry);
2516 switch ((ext >> 9) & 3) {
2527 /* Save the overflow flag from the multiply. */
2528 saved_flags = gen_new_qreg(QMODE_I32);
2529 gen_op_mov32(saved_flags, QREG_MACSR);
2532 if ((s->env->macsr & MACSR_OMC) != 0 && dual) {
2533 /* Skip the accumulate if the value is already saturated. */
2534 l1 = gen_new_label();
2535 tmp = gen_new_qreg(QMODE_I32);
2536 gen_op_and32(tmp, QREG_MACSR, gen_im32(MACSR_PAV0 << acc));
2537 gen_op_jmp_nz32(tmp, l1);
2545 if (s->env->macsr & MACSR_FI)
2546 gen_op_macsatf(acc);
2547 else if (s->env->macsr & MACSR_SU)
2548 gen_op_macsats(acc);
2550 gen_op_macsatu(acc);
2556 /* Dual accumulate variant. */
2557 acc = (ext >> 2) & 3;
2558 /* Restore the overflow flag from the multiplier. */
2559 gen_op_mov32(QREG_MACSR, saved_flags);
2560 if ((s->env->macsr & MACSR_OMC) != 0) {
2561 /* Skip the accumulate if the value is already saturated. */
2562 l1 = gen_new_label();
2563 tmp = gen_new_qreg(QMODE_I32);
2564 gen_op_and32(tmp, QREG_MACSR, gen_im32(MACSR_PAV0 << acc));
2565 gen_op_jmp_nz32(tmp, l1);
2571 if (s->env->macsr & MACSR_FI)
2572 gen_op_macsatf(acc);
2573 else if (s->env->macsr & MACSR_SU)
2574 gen_op_macsats(acc);
2576 gen_op_macsatu(acc);
2580 gen_op_mac_set_flags(acc);
2584 rw = (insn & 0x40) ? AREG(insn, 9) : DREG(insn, 9);
2585 gen_op_mov32(rw, loadval);
2586 /* FIXME: Should address writeback happen with the masked or
2588 switch ((insn >> 3) & 7) {
2589 case 3: /* Post-increment. */
2590 gen_op_add32(AREG(insn, 0), addr, gen_im32(4));
2592 case 4: /* Pre-decrement. */
2593 gen_op_mov32(AREG(insn, 0), addr);
2598 DISAS_INSN(from_mac)
2603 rx = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
2604 acc = (insn >> 9) & 3;
2605 if (s->env->macsr & MACSR_FI) {
2606 gen_op_get_macf(rx, acc);
2607 } else if ((s->env->macsr & MACSR_OMC) == 0) {
2608 gen_op_get_maci(rx, acc);
2609 } else if (s->env->macsr & MACSR_SU) {
2610 gen_op_get_macs(rx, acc);
2612 gen_op_get_macu(rx, acc);
2615 gen_op_clear_mac(acc);
2618 DISAS_INSN(move_mac)
2623 dest = (insn >> 9) & 3;
2624 gen_op_move_mac(dest, src);
2625 gen_op_mac_clear_flags();
2626 gen_op_mac_set_flags(dest);
2629 DISAS_INSN(from_macsr)
2633 reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
2634 gen_op_mov32(reg, QREG_MACSR);
2637 DISAS_INSN(from_mask)
2640 reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
2641 gen_op_mov32(reg, QREG_MAC_MASK);
2644 DISAS_INSN(from_mext)
2648 reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
2649 acc = (insn & 0x400) ? 2 : 0;
2650 if (s->env->macsr & MACSR_FI)
2651 gen_op_get_mac_extf(reg, acc);
2653 gen_op_get_mac_exti(reg, acc);
2656 DISAS_INSN(macsr_to_ccr)
2658 gen_op_mov32(QREG_CC_X, gen_im32(0));
2659 gen_op_and32(QREG_CC_DEST, QREG_MACSR, gen_im32(0xf));
2660 s->cc_op = CC_OP_FLAGS;
2667 acc = (insn >>9) & 3;
2668 SRC_EA(val, OS_LONG, 0, NULL);
2669 if (s->env->macsr & MACSR_FI) {
2670 gen_op_set_macf(val, acc);
2671 } else if (s->env->macsr & MACSR_SU) {
2672 gen_op_set_macs(val, acc);
2674 gen_op_set_macu(val, acc);
2676 gen_op_mac_clear_flags();
2677 gen_op_mac_set_flags(acc);
2680 DISAS_INSN(to_macsr)
2683 SRC_EA(val, OS_LONG, 0, NULL);
2684 gen_op_set_macsr(val);
2691 SRC_EA(val, OS_LONG, 0, NULL);
2692 gen_op_or32(QREG_MAC_MASK, val, gen_im32(0xffff0000));
2699 SRC_EA(val, OS_LONG, 0, NULL);
2700 acc = (insn & 0x400) ? 2 : 0;
2701 if (s->env->macsr & MACSR_FI)
2702 gen_op_set_mac_extf(val, acc);
2703 else if (s->env->macsr & MACSR_SU)
2704 gen_op_set_mac_exts(val, acc);
2706 gen_op_set_mac_extu(val, acc);
2709 static disas_proc opcode_table[65536];
2712 register_opcode (disas_proc proc, uint16_t opcode, uint16_t mask)
2718 /* Sanity check. All set bits must be included in the mask. */
2719 if (opcode & ~mask) {
2721 "qemu internal error: bogus opcode definition %04x/%04x\n",
2725 /* This could probably be cleverer. For now just optimize the case where
2726 the top bits are known. */
2727 /* Find the first zero bit in the mask. */
2729 while ((i & mask) != 0)
2731 /* Iterate over all combinations of this and lower bits. */
2736 from = opcode & ~(i - 1);
2738 for (i = from; i < to; i++) {
2739 if ((i & mask) == opcode)
2740 opcode_table[i] = proc;
2744 /* Register m68k opcode handlers. Order is important.
2745 Later insn override earlier ones. */
2746 void register_m68k_insns (CPUM68KState *env)
2748 #define INSN(name, opcode, mask, feature) \
2749 if (m68k_feature(env, M68K_FEATURE_##feature)) \
2750 register_opcode(disas_##name, 0x##opcode, 0x##mask)
2751 INSN(undef, 0000, 0000, CF_ISA_A);
2752 INSN(arith_im, 0080, fff8, CF_ISA_A);
2753 INSN(bitrev, 00c0, fff8, CF_ISA_C);
2754 INSN(bitop_reg, 0100, f1c0, CF_ISA_A);
2755 INSN(bitop_reg, 0140, f1c0, CF_ISA_A);
2756 INSN(bitop_reg, 0180, f1c0, CF_ISA_A);
2757 INSN(bitop_reg, 01c0, f1c0, CF_ISA_A);
2758 INSN(arith_im, 0280, fff8, CF_ISA_A);
2759 INSN(byterev, 02c0, fff8, CF_ISA_A);
2760 INSN(arith_im, 0480, fff8, CF_ISA_A);
2761 INSN(ff1, 04c0, fff8, CF_ISA_C);
2762 INSN(arith_im, 0680, fff8, CF_ISA_A);
2763 INSN(bitop_im, 0800, ffc0, CF_ISA_A);
2764 INSN(bitop_im, 0840, ffc0, CF_ISA_A);
2765 INSN(bitop_im, 0880, ffc0, CF_ISA_A);
2766 INSN(bitop_im, 08c0, ffc0, CF_ISA_A);
2767 INSN(arith_im, 0a80, fff8, CF_ISA_A);
2768 INSN(arith_im, 0c00, ff38, CF_ISA_A);
2769 INSN(move, 1000, f000, CF_ISA_A);
2770 INSN(move, 2000, f000, CF_ISA_A);
2771 INSN(move, 3000, f000, CF_ISA_A);
2772 INSN(strldsr, 40e7, ffff, CF_ISA_A);
2773 INSN(negx, 4080, fff8, CF_ISA_A);
2774 INSN(move_from_sr, 40c0, fff8, CF_ISA_A);
2775 INSN(lea, 41c0, f1c0, CF_ISA_A);
2776 INSN(clr, 4200, ff00, CF_ISA_A);
2777 INSN(undef, 42c0, ffc0, CF_ISA_A);
2778 INSN(move_from_ccr, 42c0, fff8, CF_ISA_A);
2779 INSN(neg, 4480, fff8, CF_ISA_A);
2780 INSN(move_to_ccr, 44c0, ffc0, CF_ISA_A);
2781 INSN(not, 4680, fff8, CF_ISA_A);
2782 INSN(move_to_sr, 46c0, ffc0, CF_ISA_A);
2783 INSN(pea, 4840, ffc0, CF_ISA_A);
2784 INSN(swap, 4840, fff8, CF_ISA_A);
2785 INSN(movem, 48c0, fbc0, CF_ISA_A);
2786 INSN(ext, 4880, fff8, CF_ISA_A);
2787 INSN(ext, 48c0, fff8, CF_ISA_A);
2788 INSN(ext, 49c0, fff8, CF_ISA_A);
2789 INSN(tst, 4a00, ff00, CF_ISA_A);
2790 INSN(tas, 4ac0, ffc0, CF_ISA_B);
2791 INSN(halt, 4ac8, ffff, CF_ISA_A);
2792 INSN(pulse, 4acc, ffff, CF_ISA_A);
2793 INSN(illegal, 4afc, ffff, CF_ISA_A);
2794 INSN(mull, 4c00, ffc0, CF_ISA_A);
2795 INSN(divl, 4c40, ffc0, CF_ISA_A);
2796 INSN(sats, 4c80, fff8, CF_ISA_B);
2797 INSN(trap, 4e40, fff0, CF_ISA_A);
2798 INSN(link, 4e50, fff8, CF_ISA_A);
2799 INSN(unlk, 4e58, fff8, CF_ISA_A);
2800 INSN(move_to_usp, 4e60, fff8, CF_ISA_B);
2801 INSN(move_from_usp, 4e68, fff8, CF_ISA_B);
2802 INSN(nop, 4e71, ffff, CF_ISA_A);
2803 INSN(stop, 4e72, ffff, CF_ISA_A);
2804 INSN(rte, 4e73, ffff, CF_ISA_A);
2805 INSN(rts, 4e75, ffff, CF_ISA_A);
2806 INSN(movec, 4e7b, ffff, CF_ISA_A);
2807 INSN(jump, 4e80, ffc0, CF_ISA_A);
2808 INSN(jump, 4ec0, ffc0, CF_ISA_A);
2809 INSN(addsubq, 5180, f1c0, CF_ISA_A);
2810 INSN(scc, 50c0, f0f8, CF_ISA_A);
2811 INSN(addsubq, 5080, f1c0, CF_ISA_A);
2812 INSN(tpf, 51f8, fff8, CF_ISA_A);
2813 INSN(branch, 6000, f000, CF_ISA_A);
2814 INSN(moveq, 7000, f100, CF_ISA_A);
2815 INSN(mvzs, 7100, f100, CF_ISA_B);
2816 INSN(or, 8000, f000, CF_ISA_A);
2817 INSN(divw, 80c0, f0c0, CF_ISA_A);
2818 INSN(addsub, 9000, f000, CF_ISA_A);
2819 INSN(subx, 9180, f1f8, CF_ISA_A);
2820 INSN(suba, 91c0, f1c0, CF_ISA_A);
2822 INSN(undef_mac, a000, f000, CF_ISA_A);
2823 INSN(mac, a000, f100, CF_EMAC);
2824 INSN(from_mac, a180, f9b0, CF_EMAC);
2825 INSN(move_mac, a110, f9fc, CF_EMAC);
2826 INSN(from_macsr,a980, f9f0, CF_EMAC);
2827 INSN(from_mask, ad80, fff0, CF_EMAC);
2828 INSN(from_mext, ab80, fbf0, CF_EMAC);
2829 INSN(macsr_to_ccr, a9c0, ffff, CF_EMAC);
2830 INSN(to_mac, a100, f9c0, CF_EMAC);
2831 INSN(to_macsr, a900, ffc0, CF_EMAC);
2832 INSN(to_mext, ab00, fbc0, CF_EMAC);
2833 INSN(to_mask, ad00, ffc0, CF_EMAC);
2835 INSN(mov3q, a140, f1c0, CF_ISA_B);
2836 INSN(cmp, b000, f1c0, CF_ISA_B); /* cmp.b */
2837 INSN(cmp, b040, f1c0, CF_ISA_B); /* cmp.w */
2838 INSN(cmpa, b0c0, f1c0, CF_ISA_B); /* cmpa.w */
2839 INSN(cmp, b080, f1c0, CF_ISA_A);
2840 INSN(cmpa, b1c0, f1c0, CF_ISA_A);
2841 INSN(eor, b180, f1c0, CF_ISA_A);
2842 INSN(and, c000, f000, CF_ISA_A);
2843 INSN(mulw, c0c0, f0c0, CF_ISA_A);
2844 INSN(addsub, d000, f000, CF_ISA_A);
2845 INSN(addx, d180, f1f8, CF_ISA_A);
2846 INSN(adda, d1c0, f1c0, CF_ISA_A);
2847 INSN(shift_im, e080, f0f0, CF_ISA_A);
2848 INSN(shift_reg, e0a0, f0f0, CF_ISA_A);
2849 INSN(undef_fpu, f000, f000, CF_ISA_A);
2850 INSN(fpu, f200, ffc0, CF_FPU);
2851 INSN(fbcc, f280, ffc0, CF_FPU);
2852 INSN(frestore, f340, ffc0, CF_FPU);
2853 INSN(fsave, f340, ffc0, CF_FPU);
2854 INSN(intouch, f340, ffc0, CF_ISA_A);
2855 INSN(cpushl, f428, ff38, CF_ISA_A);
2856 INSN(wddata, fb00, ff00, CF_ISA_A);
2857 INSN(wdebug, fbc0, ffc0, CF_ISA_A);
2861 /* ??? Some of this implementation is not exception safe. We should always
2862 write back the result to memory before setting the condition codes. */
2863 static void disas_m68k_insn(CPUState * env, DisasContext *s)
2867 insn = lduw_code(s->pc);
2870 opcode_table[insn](s, insn);
2874 /* Save the result of a floating point operation. */
2875 static void expand_op_fp_result(qOP *qop)
2877 gen_op_movf64(QREG_FP_RESULT, qop->args[0]);
2880 /* Dummy op to indicate that the flags have been set. */
2881 static void expand_op_flags_set(qOP *qop)
2885 /* Convert the confition codes into CC_OP_FLAGS format. */
2886 static void expand_op_flush_flags(qOP *qop)
2890 if (qop->args[0] == CC_OP_DYNAMIC)
2891 cc_opreg = QREG_CC_OP;
2893 cc_opreg = gen_im32(qop->args[0]);
2894 gen_op_helper32(QREG_NULL, cc_opreg, HELPER_flush_flags);
2897 /* Set CC_DEST after a logical or direct flag setting operation. */
2898 static void expand_op_logic_cc(qOP *qop)
2900 gen_op_mov32(QREG_CC_DEST, qop->args[0]);
2903 /* Set CC_SRC and CC_DEST after an arithmetic operation. */
2904 static void expand_op_update_cc_add(qOP *qop)
2906 gen_op_mov32(QREG_CC_DEST, qop->args[0]);
2907 gen_op_mov32(QREG_CC_SRC, qop->args[1]);
2910 /* Update the X flag. */
2911 static void expand_op_update_xflag(qOP *qop)
2916 arg0 = qop->args[0];
2917 arg1 = qop->args[1];
2918 if (arg1 == QREG_NULL) {
2920 gen_op_mov32(QREG_CC_X, arg0);
2922 /* CC_X = arg0 < (unsigned)arg1. */
2923 gen_op_set_ltu32(QREG_CC_X, arg0, arg1);
2927 /* Set arg0 to the contents of the X flag. */
2928 static void expand_op_get_xflag(qOP *qop)
2930 gen_op_mov32(qop->args[0], QREG_CC_X);
2933 /* Expand a shift by immediate. The ISA only allows shifts by 1-8, so we
2934 already know the shift is within range. */
2935 static inline void expand_shift_im(qOP *qop, int right, int arith)
2945 val = gen_new_qreg(QMODE_I32);
2946 gen_op_mov32(val, reg);
2947 gen_op_mov32(QREG_CC_DEST, val);
2948 gen_op_mov32(QREG_CC_SRC, tmp);
2951 gen_op_sar32(reg, val, tmp);
2953 gen_op_shr32(reg, val, tmp);
2958 tmp = gen_im32(im - 1);
2960 gen_op_shl32(reg, val, tmp);
2961 tmp = gen_im32(32 - im);
2963 if (tmp != QREG_NULL)
2964 gen_op_shr32(val, val, tmp);
2965 gen_op_and32(QREG_CC_X, val, gen_im32(1));
2968 static void expand_op_shl_im_cc(qOP *qop)
2970 expand_shift_im(qop, 0, 0);
2973 static void expand_op_shr_im_cc(qOP *qop)
2975 expand_shift_im(qop, 1, 0);
2978 static void expand_op_sar_im_cc(qOP *qop)
2980 expand_shift_im(qop, 1, 1);
2983 /* Expand a shift by register. */
2984 /* ??? This gives incorrect answers for shifts by 0 or >= 32 */
2985 static inline void expand_shift_reg(qOP *qop, int right, int arith)
2993 shift = qop->args[1];
2994 val = gen_new_qreg(QMODE_I32);
2995 gen_op_mov32(val, reg);
2996 gen_op_mov32(QREG_CC_DEST, val);
2997 gen_op_mov32(QREG_CC_SRC, shift);
2998 tmp = gen_new_qreg(QMODE_I32);
3001 gen_op_sar32(reg, val, shift);
3003 gen_op_shr32(reg, val, shift);
3005 gen_op_sub32(tmp, shift, gen_im32(1));
3007 gen_op_shl32(reg, val, shift);
3008 gen_op_sub32(tmp, gen_im32(31), shift);
3010 gen_op_shl32(val, val, tmp);
3011 gen_op_and32(QREG_CC_X, val, gen_im32(1));
3014 static void expand_op_shl_cc(qOP *qop)
3016 expand_shift_reg(qop, 0, 0);
3019 static void expand_op_shr_cc(qOP *qop)
3021 expand_shift_reg(qop, 1, 0);
3024 static void expand_op_sar_cc(qOP *qop)
3026 expand_shift_reg(qop, 1, 1);
3029 /* Set the Z flag to (arg0 & arg1) == 0. */
3030 static void expand_op_btest(qOP *qop)
3035 l1 = gen_new_label();
3036 tmp = gen_new_qreg(QMODE_I32);
3037 gen_op_and32(tmp, qop->args[0], qop->args[1]);
3038 gen_op_and32(QREG_CC_DEST, QREG_CC_DEST, gen_im32(~(uint32_t)CCF_Z));
3039 gen_op_jmp_nz32(tmp, l1);
3040 gen_op_or32(QREG_CC_DEST, QREG_CC_DEST, gen_im32(CCF_Z));
3044 /* arg0 += arg1 + CC_X */
3045 static void expand_op_addx_cc(qOP *qop)
3047 int arg0 = qop->args[0];
3048 int arg1 = qop->args[1];
3051 gen_op_add32 (arg0, arg0, arg1);
3052 l1 = gen_new_label();
3053 l2 = gen_new_label();
3054 gen_op_jmp_z32(QREG_CC_X, l1);
3055 gen_op_add32(arg0, arg0, gen_im32(1));
3056 gen_op_mov32(QREG_CC_OP, gen_im32(CC_OP_ADDX));
3057 gen_op_set_leu32(QREG_CC_X, arg0, arg1);
3060 gen_op_mov32(QREG_CC_OP, gen_im32(CC_OP_ADD));
3061 gen_op_set_ltu32(QREG_CC_X, arg0, arg1);
3065 /* arg0 -= arg1 + CC_X */
3066 static void expand_op_subx_cc(qOP *qop)
3068 int arg0 = qop->args[0];
3069 int arg1 = qop->args[1];
3072 l1 = gen_new_label();
3073 l2 = gen_new_label();
3074 gen_op_jmp_z32(QREG_CC_X, l1);
3075 gen_op_set_leu32(QREG_CC_X, arg0, arg1);
3076 gen_op_sub32(arg0, arg0, gen_im32(1));
3077 gen_op_mov32(QREG_CC_OP, gen_im32(CC_OP_SUBX));
3080 gen_op_set_ltu32(QREG_CC_X, arg0, arg1);
3081 gen_op_mov32(QREG_CC_OP, gen_im32(CC_OP_SUB));
3083 gen_op_sub32 (arg0, arg0, arg1);
3086 /* Expand target specific ops to generic qops. */
3087 static void expand_target_qops(void)
3093 /* Copy the list of qops, expanding target specific ops as we go. */
3094 qop = gen_first_qop;
3095 gen_first_qop = NULL;
3096 gen_last_qop = NULL;
3097 for (; qop; qop = next) {
3100 if (c < FIRST_TARGET_OP) {
3101 qop->prev = gen_last_qop;
3104 gen_last_qop->next = qop;
3106 gen_first_qop = qop;
3111 #define DEF(name, nargs, barrier) \
3112 case INDEX_op_##name: \
3113 expand_op_##name(qop); \
3115 #include "qop-target.def"
3118 cpu_abort(NULL, "Unexpanded target qop");
3123 /* ??? Implement this. */
3125 optimize_flags(void)
3130 /* generate intermediate code for basic block 'tb'. */
3132 gen_intermediate_code_internal(CPUState *env, TranslationBlock *tb,
3135 DisasContext dc1, *dc = &dc1;
3136 uint16_t *gen_opc_end;
3138 target_ulong pc_start;
3142 /* generate intermediate code */
3147 gen_opc_ptr = gen_opc_buf;
3148 gen_opc_end = gen_opc_buf + OPC_MAX_SIZE;
3149 gen_opparam_ptr = gen_opparam_buf;
3152 dc->is_jmp = DISAS_NEXT;
3154 dc->cc_op = CC_OP_DYNAMIC;
3155 dc->singlestep_enabled = env->singlestep_enabled;
3156 dc->fpcr = env->fpcr;
3157 dc->user = (env->sr & SR_S) == 0;
3162 pc_offset = dc->pc - pc_start;
3163 gen_throws_exception = NULL;
3164 if (env->nb_breakpoints > 0) {
3165 for(j = 0; j < env->nb_breakpoints; j++) {
3166 if (env->breakpoints[j] == dc->pc) {
3167 gen_exception(dc, dc->pc, EXCP_DEBUG);
3168 dc->is_jmp = DISAS_JUMP;
3176 j = gen_opc_ptr - gen_opc_buf;
3180 gen_opc_instr_start[lj++] = 0;
3182 gen_opc_pc[lj] = dc->pc;
3183 gen_opc_instr_start[lj] = 1;
3185 last_cc_op = dc->cc_op;
3186 dc->insn_pc = dc->pc;
3187 disas_m68k_insn(env, dc);
3188 } while (!dc->is_jmp && gen_opc_ptr < gen_opc_end &&
3189 !env->singlestep_enabled &&
3190 (pc_offset) < (TARGET_PAGE_SIZE - 32));
3192 if (__builtin_expect(env->singlestep_enabled, 0)) {
3193 /* Make sure the pc is updated, and raise a debug exception. */
3195 gen_flush_cc_op(dc);
3196 gen_op_mov32(QREG_PC, gen_im32((long)dc->pc));
3198 gen_op_raise_exception(EXCP_DEBUG);
3200 switch(dc->is_jmp) {
3202 gen_flush_cc_op(dc);
3203 gen_jmp_tb(dc, 0, dc->pc);
3208 gen_flush_cc_op(dc);
3209 /* indicate that the hash table must be used to find the next TB */
3210 gen_op_mov32(QREG_T0, gen_im32(0));
3214 /* nothing more to generate */
3218 *gen_opc_ptr = INDEX_op_end;
3221 if (loglevel & CPU_LOG_TB_IN_ASM) {
3222 fprintf(logfile, "----------------\n");
3223 fprintf(logfile, "IN: %s\n", lookup_symbol(pc_start));
3224 target_disas(logfile, pc_start, dc->pc - pc_start, 0);
3225 fprintf(logfile, "\n");
3226 if (loglevel & (CPU_LOG_TB_OP)) {
3227 fprintf(logfile, "OP:\n");
3228 dump_ops(gen_opc_buf, gen_opparam_buf);
3229 fprintf(logfile, "\n");
3234 j = gen_opc_ptr - gen_opc_buf;
3237 gen_opc_instr_start[lj++] = 0;
3240 tb->size = dc->pc - pc_start;
3244 //expand_target_qops();
3248 int gen_intermediate_code(CPUState *env, TranslationBlock *tb)
3250 return gen_intermediate_code_internal(env, tb, 0);
3253 int gen_intermediate_code_pc(CPUState *env, TranslationBlock *tb)
3255 return gen_intermediate_code_internal(env, tb, 1);
3258 void cpu_reset(CPUM68KState *env)
3260 memset(env, 0, offsetof(CPUM68KState, breakpoints));
3261 #if !defined (CONFIG_USER_ONLY)
3264 /* ??? FP regs should be initialized to NaN. */
3265 env->cc_op = CC_OP_FLAGS;
3266 /* TODO: We should set PC from the interrupt vector. */
3271 CPUM68KState *cpu_m68k_init(void)
3275 env = malloc(sizeof(CPUM68KState));
3284 void cpu_m68k_close(CPUM68KState *env)
3289 void cpu_dump_state(CPUState *env, FILE *f,
3290 int (*cpu_fprintf)(FILE *f, const char *fmt, ...),
3296 for (i = 0; i < 8; i++)
3298 u.d = env->fregs[i];
3299 cpu_fprintf (f, "D%d = %08x A%d = %08x F%d = %08x%08x (%12g)\n",
3300 i, env->dregs[i], i, env->aregs[i],
3301 i, u.l.upper, u.l.lower, u.d);
3303 cpu_fprintf (f, "PC = %08x ", env->pc);
3305 cpu_fprintf (f, "SR = %04x %c%c%c%c%c ", sr, (sr & 0x10) ? 'X' : '-',
3306 (sr & CCF_N) ? 'N' : '-', (sr & CCF_Z) ? 'Z' : '-',
3307 (sr & CCF_V) ? 'V' : '-', (sr & CCF_C) ? 'C' : '-');
3308 cpu_fprintf (f, "FPRESULT = %12g\n", env->fp_result);