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)
349 gen_op_flush_flags();
350 s->cc_op = CC_OP_FLAGS;
353 static inline int opsize_bytes(int opsize)
356 case OS_BYTE: return 1;
357 case OS_WORD: return 2;
358 case OS_LONG: return 4;
359 case OS_SINGLE: return 4;
360 case OS_DOUBLE: return 8;
362 qemu_assert(0, "bad operand size");
366 /* Assign value to a register. If the width is less than the register width
367 only the low part of the register is set. */
368 static void gen_partset_reg(int opsize, int reg, int val)
373 gen_op_and32(reg, reg, gen_im32(0xffffff00));
374 tmp = gen_new_qreg(QMODE_I32);
375 gen_op_and32(tmp, val, gen_im32(0xff));
376 gen_op_or32(reg, reg, tmp);
379 gen_op_and32(reg, reg, gen_im32(0xffff0000));
380 tmp = gen_new_qreg(QMODE_I32);
381 gen_op_and32(tmp, val, gen_im32(0xffff));
382 gen_op_or32(reg, reg, tmp);
385 gen_op_mov32(reg, val);
388 gen_op_pack_32_f32(reg, val);
391 qemu_assert(0, "Bad operand size");
396 /* Sign or zero extend a value. */
397 static inline int gen_extend(int val, int opsize, int sign)
403 tmp = gen_new_qreg(QMODE_I32);
405 gen_op_ext8s32(tmp, val);
407 gen_op_ext8u32(tmp, val);
410 tmp = gen_new_qreg(QMODE_I32);
412 gen_op_ext16s32(tmp, val);
414 gen_op_ext16u32(tmp, val);
420 tmp = gen_new_qreg(QMODE_F32);
421 gen_op_pack_f32_32(tmp, val);
424 qemu_assert(0, "Bad operand size");
429 /* Generate code for an "effective address". Does not adjust the base
430 register for autoincrememnt addressing modes. */
431 static int gen_lea(DisasContext *s, uint16_t insn, int opsize)
439 switch ((insn >> 3) & 7) {
440 case 0: /* Data register direct. */
441 case 1: /* Address register direct. */
443 case 2: /* Indirect register */
444 case 3: /* Indirect postincrement. */
447 case 4: /* Indirect predecrememnt. */
449 tmp = gen_new_qreg(QMODE_I32);
450 gen_op_sub32(tmp, reg, gen_im32(opsize_bytes(opsize)));
452 case 5: /* Indirect displacement. */
454 tmp = gen_new_qreg(QMODE_I32);
455 ext = lduw_code(s->pc);
457 gen_op_add32(tmp, reg, gen_im32((int16_t)ext));
459 case 6: /* Indirect index + displacement. */
461 return gen_lea_indexed(s, opsize, reg);
464 case 0: /* Absolute short. */
465 offset = ldsw_code(s->pc);
467 return gen_im32(offset);
468 case 1: /* Absolute long. */
469 offset = read_im32(s);
470 return gen_im32(offset);
471 case 2: /* pc displacement */
472 tmp = gen_new_qreg(QMODE_I32);
474 offset += ldsw_code(s->pc);
476 return gen_im32(offset);
477 case 3: /* pc index+displacement. */
478 return gen_lea_indexed(s, opsize, -1);
479 case 4: /* Immediate. */
484 /* Should never happen. */
488 /* Helper function for gen_ea. Reuse the computed address between the
489 for read/write operands. */
490 static inline int gen_ea_once(DisasContext *s, uint16_t insn, int opsize,
495 if (addrp && val > 0) {
498 tmp = gen_lea(s, insn, opsize);
504 return gen_ldst(s, opsize, tmp, val);
507 /* Generate code to load/store a value ito/from an EA. If VAL > 0 this is
508 a write otherwise it is a read (0 == sign extend, -1 == zero extend).
509 ADDRP is non-null for readwrite operands. */
510 static int gen_ea(DisasContext *s, uint16_t insn, int opsize, int val,
518 switch ((insn >> 3) & 7) {
519 case 0: /* Data register direct. */
522 gen_partset_reg(opsize, reg, val);
525 return gen_extend(reg, opsize, val);
527 case 1: /* Address register direct. */
530 gen_op_mov32(reg, val);
533 return gen_extend(reg, opsize, val);
535 case 2: /* Indirect register */
537 return gen_ldst(s, opsize, reg, val);
538 case 3: /* Indirect postincrement. */
540 result = gen_ldst(s, opsize, reg, val);
541 /* ??? This is not exception safe. The instruction may still
542 fault after this point. */
543 if (val > 0 || !addrp)
544 gen_op_add32(reg, reg, gen_im32(opsize_bytes(opsize)));
546 case 4: /* Indirect predecrememnt. */
549 if (addrp && val > 0) {
552 tmp = gen_lea(s, insn, opsize);
558 result = gen_ldst(s, opsize, tmp, val);
559 /* ??? This is not exception safe. The instruction may still
560 fault after this point. */
561 if (val > 0 || !addrp) {
563 gen_op_mov32(reg, tmp);
567 case 5: /* Indirect displacement. */
568 case 6: /* Indirect index + displacement. */
569 return gen_ea_once(s, insn, opsize, val, addrp);
572 case 0: /* Absolute short. */
573 case 1: /* Absolute long. */
574 case 2: /* pc displacement */
575 case 3: /* pc index+displacement. */
576 return gen_ea_once(s, insn, opsize, val, addrp);
577 case 4: /* Immediate. */
578 /* Sign extend values for consistency. */
582 offset = ldsb_code(s->pc + 1);
584 offset = ldub_code(s->pc + 1);
589 offset = ldsw_code(s->pc);
591 offset = lduw_code(s->pc);
595 offset = read_im32(s);
598 qemu_assert(0, "Bad immediate operand");
600 return gen_im32(offset);
605 /* Should never happen. */
609 static void gen_logic_cc(DisasContext *s, int val)
611 gen_op_logic_cc(val);
612 s->cc_op = CC_OP_LOGIC;
615 static void gen_jmpcc(DisasContext *s, int cond, int l1)
626 case 2: /* HI (!C && !Z) */
627 tmp = gen_new_qreg(QMODE_I32);
628 gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_C | CCF_Z));
629 gen_op_jmp_z32(tmp, l1);
631 case 3: /* LS (C || Z) */
632 tmp = gen_new_qreg(QMODE_I32);
633 gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_C | CCF_Z));
634 gen_op_jmp_nz32(tmp, l1);
636 case 4: /* CC (!C) */
637 tmp = gen_new_qreg(QMODE_I32);
638 gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_C));
639 gen_op_jmp_z32(tmp, l1);
642 tmp = gen_new_qreg(QMODE_I32);
643 gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_C));
644 gen_op_jmp_nz32(tmp, l1);
646 case 6: /* NE (!Z) */
647 tmp = gen_new_qreg(QMODE_I32);
648 gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_Z));
649 gen_op_jmp_z32(tmp, l1);
652 tmp = gen_new_qreg(QMODE_I32);
653 gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_Z));
654 gen_op_jmp_nz32(tmp, l1);
656 case 8: /* VC (!V) */
657 tmp = gen_new_qreg(QMODE_I32);
658 gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_V));
659 gen_op_jmp_z32(tmp, l1);
662 tmp = gen_new_qreg(QMODE_I32);
663 gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_V));
664 gen_op_jmp_nz32(tmp, l1);
666 case 10: /* PL (!N) */
667 tmp = gen_new_qreg(QMODE_I32);
668 gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_N));
669 gen_op_jmp_z32(tmp, l1);
671 case 11: /* MI (N) */
672 tmp = gen_new_qreg(QMODE_I32);
673 gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_N));
674 gen_op_jmp_nz32(tmp, l1);
676 case 12: /* GE (!(N ^ V)) */
677 tmp = gen_new_qreg(QMODE_I32);
678 gen_op_shr32(tmp, QREG_CC_DEST, gen_im32(2));
679 gen_op_xor32(tmp, tmp, QREG_CC_DEST);
680 gen_op_and32(tmp, tmp, gen_im32(CCF_V));
681 gen_op_jmp_z32(tmp, l1);
683 case 13: /* LT (N ^ V) */
684 tmp = gen_new_qreg(QMODE_I32);
685 gen_op_shr32(tmp, QREG_CC_DEST, gen_im32(2));
686 gen_op_xor32(tmp, tmp, QREG_CC_DEST);
687 gen_op_and32(tmp, tmp, gen_im32(CCF_V));
688 gen_op_jmp_nz32(tmp, l1);
690 case 14: /* GT (!(Z || (N ^ V))) */
693 l2 = gen_new_label();
694 tmp = gen_new_qreg(QMODE_I32);
695 gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_Z));
696 gen_op_jmp_nz32(tmp, l2);
697 tmp = gen_new_qreg(QMODE_I32);
698 gen_op_shr32(tmp, QREG_CC_DEST, gen_im32(2));
699 gen_op_xor32(tmp, tmp, QREG_CC_DEST);
700 gen_op_and32(tmp, tmp, gen_im32(CCF_V));
701 gen_op_jmp_nz32(tmp, l2);
706 case 15: /* LE (Z || (N ^ V)) */
707 tmp = gen_new_qreg(QMODE_I32);
708 gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_Z));
709 gen_op_jmp_nz32(tmp, l1);
710 tmp = gen_new_qreg(QMODE_I32);
711 gen_op_shr32(tmp, QREG_CC_DEST, gen_im32(2));
712 gen_op_xor32(tmp, tmp, QREG_CC_DEST);
713 gen_op_and32(tmp, tmp, gen_im32(CCF_V));
714 gen_op_jmp_nz32(tmp, l1);
717 /* Should ever happen. */
728 l1 = gen_new_label();
729 cond = (insn >> 8) & 0xf;
731 gen_op_and32(reg, reg, gen_im32(0xffffff00));
732 gen_jmpcc(s, cond ^ 1, l1);
733 gen_op_or32(reg, reg, gen_im32(0xff));
737 /* Force a TB lookup after an instruction that changes the CPU state. */
738 static void gen_lookup_tb(DisasContext *s)
741 gen_op_mov32(QREG_PC, gen_im32(s->pc));
742 s->is_jmp = DISAS_UPDATE;
745 /* Generate a jump to to the address in qreg DEST. */
746 static void gen_jmp(DisasContext *s, int dest)
749 gen_op_mov32(QREG_PC, dest);
750 s->is_jmp = DISAS_JUMP;
753 static void gen_exception(DisasContext *s, uint32_t where, int nr)
756 gen_jmp(s, gen_im32(where));
757 gen_op_raise_exception(nr);
760 static inline void gen_addr_fault(DisasContext *s)
762 gen_exception(s, s->insn_pc, EXCP_ADDRESS);
765 #define SRC_EA(result, opsize, val, addrp) do { \
766 result = gen_ea(s, insn, opsize, val, addrp); \
767 if (result == -1) { \
773 #define DEST_EA(insn, opsize, val, addrp) do { \
774 int ea_result = gen_ea(s, insn, opsize, val, addrp); \
775 if (ea_result == -1) { \
781 /* Generate a jump to an immediate address. */
782 static void gen_jmp_tb(DisasContext *s, int n, uint32_t dest)
784 TranslationBlock *tb;
787 if (__builtin_expect (s->singlestep_enabled, 0)) {
788 gen_exception(s, dest, EXCP_DEBUG);
789 } else if ((tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK) ||
790 (s->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK)) {
791 gen_op_goto_tb(0, n, (long)tb);
792 gen_op_mov32(QREG_PC, gen_im32(dest));
793 gen_op_mov32(QREG_T0, gen_im32((long)tb + n));
796 gen_jmp(s, gen_im32(dest));
797 gen_op_mov32(QREG_T0, gen_im32(0));
800 s->is_jmp = DISAS_TB_JUMP;
803 DISAS_INSN(undef_mac)
805 gen_exception(s, s->pc - 2, EXCP_LINEA);
808 DISAS_INSN(undef_fpu)
810 gen_exception(s, s->pc - 2, EXCP_LINEF);
815 gen_exception(s, s->pc - 2, EXCP_UNSUPPORTED);
816 cpu_abort(cpu_single_env, "Illegal instruction: %04x @ %08x",
827 sign = (insn & 0x100) != 0;
829 tmp = gen_new_qreg(QMODE_I32);
831 gen_op_ext16s32(tmp, reg);
833 gen_op_ext16u32(tmp, reg);
834 SRC_EA(src, OS_WORD, sign ? -1 : 0, NULL);
835 gen_op_mul32(tmp, tmp, src);
836 gen_op_mov32(reg, tmp);
837 /* Unlike m68k, coldfire always clears the overflow bit. */
838 gen_logic_cc(s, tmp);
848 sign = (insn & 0x100) != 0;
851 gen_op_ext16s32(QREG_DIV1, reg);
853 gen_op_ext16u32(QREG_DIV1, reg);
855 SRC_EA(src, OS_WORD, sign ? -1 : 0, NULL);
856 gen_op_mov32(QREG_DIV2, src);
863 tmp = gen_new_qreg(QMODE_I32);
864 src = gen_new_qreg(QMODE_I32);
865 gen_op_ext16u32(tmp, QREG_DIV1);
866 gen_op_shl32(src, QREG_DIV2, gen_im32(16));
867 gen_op_or32(reg, tmp, src);
869 s->cc_op = CC_OP_FLAGS;
879 ext = lduw_code(s->pc);
882 gen_exception(s, s->pc - 4, EXCP_UNSUPPORTED);
887 gen_op_mov32(QREG_DIV1, num);
888 SRC_EA(den, OS_LONG, 0, NULL);
889 gen_op_mov32(QREG_DIV2, den);
897 gen_op_mov32 (reg, QREG_DIV1);
900 gen_op_mov32 (reg, QREG_DIV2);
903 s->cc_op = CC_OP_FLAGS;
915 add = (insn & 0x4000) != 0;
917 dest = gen_new_qreg(QMODE_I32);
919 SRC_EA(tmp, OS_LONG, 0, &addr);
923 SRC_EA(src, OS_LONG, 0, NULL);
926 gen_op_add32(dest, tmp, src);
927 gen_op_update_xflag_lt(dest, src);
928 s->cc_op = CC_OP_ADD;
930 gen_op_update_xflag_lt(tmp, src);
931 gen_op_sub32(dest, tmp, src);
932 s->cc_op = CC_OP_SUB;
934 gen_op_update_cc_add(dest, src);
936 DEST_EA(insn, OS_LONG, dest, &addr);
938 gen_op_mov32(reg, dest);
943 /* Reverse the order of the bits in REG. */
951 val = gen_new_qreg(QMODE_I32);
952 tmp1 = gen_new_qreg(QMODE_I32);
953 tmp2 = gen_new_qreg(QMODE_I32);
955 gen_op_mov32(val, reg);
956 /* Reverse bits within each nibble. */
957 gen_op_shl32(tmp1, val, gen_im32(3));
958 gen_op_and32(tmp1, tmp1, gen_im32(0x88888888));
959 gen_op_shl32(tmp2, val, gen_im32(1));
960 gen_op_and32(tmp2, tmp2, gen_im32(0x44444444));
961 gen_op_or32(tmp1, tmp1, tmp2);
962 gen_op_shr32(tmp2, val, gen_im32(1));
963 gen_op_and32(tmp2, tmp2, gen_im32(0x22222222));
964 gen_op_or32(tmp1, tmp1, tmp2);
965 gen_op_shr32(tmp2, val, gen_im32(3));
966 gen_op_and32(tmp2, tmp2, gen_im32(0x11111111));
967 gen_op_or32(tmp1, tmp1, tmp2);
968 /* Reverse nibbles withing bytes. */
969 gen_op_shl32(val, tmp1, gen_im32(4));
970 gen_op_and32(val, val, gen_im32(0xf0f0f0f0));
971 gen_op_shr32(tmp2, tmp1, gen_im32(4));
972 gen_op_and32(tmp2, tmp2, gen_im32(0x0f0f0f0f));
973 gen_op_or32(val, val, tmp2);
975 gen_op_bswap32(reg, val);
976 gen_op_mov32(reg, val);
979 DISAS_INSN(bitop_reg)
989 if ((insn & 0x38) != 0)
993 op = (insn >> 6) & 3;
994 SRC_EA(src1, opsize, 0, op ? &addr: NULL);
995 src2 = DREG(insn, 9);
996 dest = gen_new_qreg(QMODE_I32);
999 tmp = gen_new_qreg(QMODE_I32);
1000 if (opsize == OS_BYTE)
1001 gen_op_and32(tmp, src2, gen_im32(7));
1003 gen_op_and32(tmp, src2, gen_im32(31));
1005 tmp = gen_new_qreg(QMODE_I32);
1006 gen_op_shl32(tmp, gen_im32(1), src2);
1008 gen_op_btest(src1, tmp);
1011 gen_op_xor32(dest, src1, tmp);
1014 gen_op_not32(tmp, tmp);
1015 gen_op_and32(dest, src1, tmp);
1018 gen_op_or32(dest, src1, tmp);
1024 DEST_EA(insn, opsize, dest, &addr);
1033 reg = DREG(insn, 0);
1034 tmp = gen_new_qreg(QMODE_I32);
1036 gen_op_and32(tmp, QREG_CC_DEST, gen_im32(CCF_V));
1037 l1 = gen_new_label();
1038 gen_op_jmp_z32(tmp, l1);
1039 tmp = gen_new_qreg(QMODE_I32);
1040 gen_op_shr32(tmp, reg, gen_im32(31));
1041 gen_op_xor32(tmp, tmp, gen_im32(0x80000000));
1042 gen_op_mov32(reg, tmp);
1044 gen_logic_cc(s, tmp);
1047 static void gen_push(DisasContext *s, int val)
1051 tmp = gen_new_qreg(QMODE_I32);
1052 gen_op_sub32(tmp, QREG_SP, gen_im32(4));
1053 gen_store(s, OS_LONG, tmp, val);
1054 gen_op_mov32(QREG_SP, tmp);
1066 mask = lduw_code(s->pc);
1068 tmp = gen_lea(s, insn, OS_LONG);
1073 addr = gen_new_qreg(QMODE_I32);
1074 gen_op_mov32(addr, tmp);
1075 is_load = ((insn & 0x0400) != 0);
1076 for (i = 0; i < 16; i++, mask >>= 1) {
1083 tmp = gen_load(s, OS_LONG, addr, 0);
1084 gen_op_mov32(reg, tmp);
1086 gen_store(s, OS_LONG, addr, reg);
1089 gen_op_add32(addr, addr, gen_im32(4));
1094 DISAS_INSN(bitop_im)
1105 if ((insn & 0x38) != 0)
1109 op = (insn >> 6) & 3;
1111 bitnum = lduw_code(s->pc);
1113 if (bitnum & 0xff00) {
1114 disas_undef(s, insn);
1118 SRC_EA(src1, opsize, 0, op ? &addr: NULL);
1121 tmp = gen_new_qreg(QMODE_I32);
1122 if (opsize == OS_BYTE)
1128 gen_op_btest(src1, gen_im32(mask));
1130 dest = gen_new_qreg(QMODE_I32);
1136 gen_op_xor32(dest, src1, gen_im32(mask));
1139 gen_op_and32(dest, src1, gen_im32(~mask));
1142 gen_op_or32(dest, src1, gen_im32(mask));
1148 DEST_EA(insn, opsize, dest, &addr);
1151 DISAS_INSN(arith_im)
1159 op = (insn >> 9) & 7;
1160 SRC_EA(src1, OS_LONG, 0, (op == 6) ? NULL : &addr);
1161 src2 = gen_im32(read_im32(s));
1162 dest = gen_new_qreg(QMODE_I32);
1165 gen_op_or32(dest, src1, src2);
1166 gen_logic_cc(s, dest);
1169 gen_op_and32(dest, src1, src2);
1170 gen_logic_cc(s, dest);
1173 gen_op_mov32(dest, src1);
1174 gen_op_update_xflag_lt(dest, src2);
1175 gen_op_sub32(dest, dest, src2);
1176 gen_op_update_cc_add(dest, src2);
1177 s->cc_op = CC_OP_SUB;
1180 gen_op_mov32(dest, src1);
1181 gen_op_add32(dest, dest, src2);
1182 gen_op_update_cc_add(dest, src2);
1183 gen_op_update_xflag_lt(dest, src2);
1184 s->cc_op = CC_OP_ADD;
1187 gen_op_xor32(dest, src1, src2);
1188 gen_logic_cc(s, dest);
1191 gen_op_mov32(dest, src1);
1192 gen_op_sub32(dest, dest, src2);
1193 gen_op_update_cc_add(dest, src2);
1194 s->cc_op = CC_OP_SUB;
1200 DEST_EA(insn, OS_LONG, dest, &addr);
1208 reg = DREG(insn, 0);
1209 gen_op_bswap32(reg, reg);
1219 switch (insn >> 12) {
1220 case 1: /* move.b */
1223 case 2: /* move.l */
1226 case 3: /* move.w */
1232 SRC_EA(src, opsize, -1, NULL);
1233 op = (insn >> 6) & 7;
1236 /* The value will already have been sign extended. */
1237 dest = AREG(insn, 9);
1238 gen_op_mov32(dest, src);
1242 dest_ea = ((insn >> 9) & 7) | (op << 3);
1243 DEST_EA(dest_ea, opsize, src, NULL);
1244 /* This will be correct because loads sign extend. */
1245 gen_logic_cc(s, src);
1256 reg = DREG(insn, 0);
1257 dest = gen_new_qreg(QMODE_I32);
1258 gen_op_mov32 (dest, gen_im32(0));
1259 gen_op_subx_cc(dest, reg);
1261 tmp = gen_new_qreg(QMODE_I32);
1262 gen_op_mov32 (tmp, QREG_CC_DEST);
1263 gen_op_update_cc_add(dest, reg);
1264 gen_op_mov32(reg, dest);
1265 s->cc_op = CC_OP_DYNAMIC;
1267 gen_op_or32(tmp, tmp, gen_im32(~CCF_Z));
1268 gen_op_and32(QREG_CC_DEST, QREG_CC_DEST, tmp);
1269 s->cc_op = CC_OP_FLAGS;
1277 reg = AREG(insn, 9);
1278 tmp = gen_lea(s, insn, OS_LONG);
1283 gen_op_mov32(reg, tmp);
1290 switch ((insn >> 6) & 3) {
1303 DEST_EA(insn, opsize, gen_im32(0), NULL);
1304 gen_logic_cc(s, gen_im32(0));
1307 static int gen_get_ccr(DisasContext *s)
1312 dest = gen_new_qreg(QMODE_I32);
1313 gen_op_get_xflag(dest);
1314 gen_op_shl32(dest, dest, gen_im32(4));
1315 gen_op_or32(dest, dest, QREG_CC_DEST);
1319 DISAS_INSN(move_from_ccr)
1324 ccr = gen_get_ccr(s);
1325 reg = DREG(insn, 0);
1326 gen_partset_reg(OS_WORD, reg, ccr);
1334 reg = DREG(insn, 0);
1335 src1 = gen_new_qreg(QMODE_I32);
1336 gen_op_mov32(src1, reg);
1337 gen_op_neg32(reg, src1);
1338 s->cc_op = CC_OP_SUB;
1339 gen_op_update_cc_add(reg, src1);
1340 gen_op_update_xflag_lt(gen_im32(0), src1);
1341 s->cc_op = CC_OP_SUB;
1344 static void gen_set_sr_im(DisasContext *s, uint16_t val, int ccr_only)
1346 gen_op_logic_cc(gen_im32(val & 0xf));
1347 gen_op_update_xflag_tst(gen_im32((val & 0x10) >> 4));
1349 gen_op_set_sr(gen_im32(val & 0xff00));
1353 static void gen_set_sr(DisasContext *s, uint16_t insn, int ccr_only)
1358 s->cc_op = CC_OP_FLAGS;
1359 if ((insn & 0x38) == 0)
1361 src1 = gen_new_qreg(QMODE_I32);
1362 reg = DREG(insn, 0);
1363 gen_op_and32(src1, reg, gen_im32(0xf));
1364 gen_op_logic_cc(src1);
1365 gen_op_shr32(src1, reg, gen_im32(4));
1366 gen_op_and32(src1, src1, gen_im32(1));
1367 gen_op_update_xflag_tst(src1);
1372 else if ((insn & 0x3f) == 0x3c)
1375 val = lduw_code(s->pc);
1377 gen_set_sr_im(s, val, ccr_only);
1380 disas_undef(s, insn);
1383 DISAS_INSN(move_to_ccr)
1385 gen_set_sr(s, insn, 1);
1392 reg = DREG(insn, 0);
1393 gen_op_not32(reg, reg);
1394 gen_logic_cc(s, reg);
1404 dest = gen_new_qreg(QMODE_I32);
1405 src1 = gen_new_qreg(QMODE_I32);
1406 src2 = gen_new_qreg(QMODE_I32);
1407 reg = DREG(insn, 0);
1408 gen_op_shl32(src1, reg, gen_im32(16));
1409 gen_op_shr32(src2, reg, gen_im32(16));
1410 gen_op_or32(dest, src1, src2);
1411 gen_op_mov32(reg, dest);
1412 gen_logic_cc(s, dest);
1419 tmp = gen_lea(s, insn, OS_LONG);
1433 reg = DREG(insn, 0);
1434 op = (insn >> 6) & 7;
1435 tmp = gen_new_qreg(QMODE_I32);
1437 gen_op_ext16s32(tmp, reg);
1439 gen_op_ext8s32(tmp, reg);
1441 gen_partset_reg(OS_WORD, reg, tmp);
1443 gen_op_mov32(reg, tmp);
1444 gen_logic_cc(s, tmp);
1452 switch ((insn >> 6) & 3) {
1465 SRC_EA(tmp, opsize, -1, NULL);
1466 gen_logic_cc(s, tmp);
1471 /* Implemented as a NOP. */
1476 gen_exception(s, s->pc - 2, EXCP_ILLEGAL);
1479 /* ??? This should be atomic. */
1486 dest = gen_new_qreg(QMODE_I32);
1487 SRC_EA(src1, OS_BYTE, -1, &addr);
1488 gen_logic_cc(s, src1);
1489 gen_op_or32(dest, src1, gen_im32(0x80));
1490 DEST_EA(insn, OS_BYTE, dest, &addr);
1500 /* The upper 32 bits of the product are discarded, so
1501 muls.l and mulu.l are functionally equivalent. */
1502 ext = lduw_code(s->pc);
1505 gen_exception(s, s->pc - 4, EXCP_UNSUPPORTED);
1508 reg = DREG(ext, 12);
1509 SRC_EA(src1, OS_LONG, 0, NULL);
1510 dest = gen_new_qreg(QMODE_I32);
1511 gen_op_mul32(dest, src1, reg);
1512 gen_op_mov32(reg, dest);
1513 /* Unlike m68k, coldfire always clears the overflow bit. */
1514 gen_logic_cc(s, dest);
1523 offset = ldsw_code(s->pc);
1525 reg = AREG(insn, 0);
1526 tmp = gen_new_qreg(QMODE_I32);
1527 gen_op_sub32(tmp, QREG_SP, gen_im32(4));
1528 gen_store(s, OS_LONG, tmp, reg);
1530 gen_op_mov32(reg, tmp);
1531 gen_op_add32(QREG_SP, tmp, gen_im32(offset));
1540 src = gen_new_qreg(QMODE_I32);
1541 reg = AREG(insn, 0);
1542 gen_op_mov32(src, reg);
1543 tmp = gen_load(s, OS_LONG, src, 0);
1544 gen_op_mov32(reg, tmp);
1545 gen_op_add32(QREG_SP, src, gen_im32(4));
1556 tmp = gen_load(s, OS_LONG, QREG_SP, 0);
1557 gen_op_add32(QREG_SP, QREG_SP, gen_im32(4));
1565 /* Load the target address first to ensure correct exception
1567 tmp = gen_lea(s, insn, OS_LONG);
1572 if ((insn & 0x40) == 0) {
1574 gen_push(s, gen_im32(s->pc));
1587 SRC_EA(src1, OS_LONG, 0, &addr);
1588 val = (insn >> 9) & 7;
1591 src2 = gen_im32(val);
1592 dest = gen_new_qreg(QMODE_I32);
1593 gen_op_mov32(dest, src1);
1594 if ((insn & 0x38) == 0x08) {
1595 /* Don't update condition codes if the destination is an
1596 address register. */
1597 if (insn & 0x0100) {
1598 gen_op_sub32(dest, dest, src2);
1600 gen_op_add32(dest, dest, src2);
1603 if (insn & 0x0100) {
1604 gen_op_update_xflag_lt(dest, src2);
1605 gen_op_sub32(dest, dest, src2);
1606 s->cc_op = CC_OP_SUB;
1608 gen_op_add32(dest, dest, src2);
1609 gen_op_update_xflag_lt(dest, src2);
1610 s->cc_op = CC_OP_ADD;
1612 gen_op_update_cc_add(dest, src2);
1614 DEST_EA(insn, OS_LONG, dest, &addr);
1620 case 2: /* One extension word. */
1623 case 3: /* Two extension words. */
1626 case 4: /* No extension words. */
1629 disas_undef(s, insn);
1641 op = (insn >> 8) & 0xf;
1642 offset = (int8_t)insn;
1644 offset = ldsw_code(s->pc);
1646 } else if (offset == -1) {
1647 offset = read_im32(s);
1651 gen_push(s, gen_im32(s->pc));
1656 l1 = gen_new_label();
1657 gen_jmpcc(s, ((insn >> 8) & 0xf) ^ 1, l1);
1658 gen_jmp_tb(s, 1, base + offset);
1660 gen_jmp_tb(s, 0, s->pc);
1662 /* Unconditional branch. */
1663 gen_jmp_tb(s, 0, base + offset);
1671 tmp = gen_im32((int8_t)insn);
1672 gen_op_mov32(DREG(insn, 9), tmp);
1673 gen_logic_cc(s, tmp);
1686 SRC_EA(src, opsize, (insn & 0x80) ? 0 : -1, NULL);
1687 reg = DREG(insn, 9);
1688 gen_op_mov32(reg, src);
1689 gen_logic_cc(s, src);
1699 reg = DREG(insn, 9);
1700 dest = gen_new_qreg(QMODE_I32);
1702 SRC_EA(src, OS_LONG, 0, &addr);
1703 gen_op_or32(dest, src, reg);
1704 DEST_EA(insn, OS_LONG, dest, &addr);
1706 SRC_EA(src, OS_LONG, 0, NULL);
1707 gen_op_or32(dest, src, reg);
1708 gen_op_mov32(reg, dest);
1710 gen_logic_cc(s, dest);
1718 SRC_EA(src, OS_LONG, 0, NULL);
1719 reg = AREG(insn, 9);
1720 gen_op_sub32(reg, reg, src);
1731 reg = DREG(insn, 9);
1732 src = DREG(insn, 0);
1733 dest = gen_new_qreg(QMODE_I32);
1734 gen_op_mov32 (dest, reg);
1735 gen_op_subx_cc(dest, src);
1737 tmp = gen_new_qreg(QMODE_I32);
1738 gen_op_mov32 (tmp, QREG_CC_DEST);
1739 gen_op_update_cc_add(dest, src);
1740 gen_op_mov32(reg, dest);
1741 s->cc_op = CC_OP_DYNAMIC;
1743 gen_op_or32(tmp, tmp, gen_im32(~CCF_Z));
1744 gen_op_and32(QREG_CC_DEST, QREG_CC_DEST, tmp);
1745 s->cc_op = CC_OP_FLAGS;
1753 val = (insn >> 9) & 7;
1756 src = gen_im32(val);
1757 gen_logic_cc(s, src);
1758 DEST_EA(insn, OS_LONG, src, NULL);
1769 op = (insn >> 6) & 3;
1773 s->cc_op = CC_OP_CMPB;
1777 s->cc_op = CC_OP_CMPW;
1781 s->cc_op = CC_OP_SUB;
1786 SRC_EA(src, opsize, -1, NULL);
1787 reg = DREG(insn, 9);
1788 dest = gen_new_qreg(QMODE_I32);
1789 gen_op_sub32(dest, reg, src);
1790 gen_op_update_cc_add(dest, src);
1805 SRC_EA(src, opsize, -1, NULL);
1806 reg = AREG(insn, 9);
1807 dest = gen_new_qreg(QMODE_I32);
1808 gen_op_sub32(dest, reg, src);
1809 gen_op_update_cc_add(dest, src);
1810 s->cc_op = CC_OP_SUB;
1820 SRC_EA(src, OS_LONG, 0, &addr);
1821 reg = DREG(insn, 9);
1822 dest = gen_new_qreg(QMODE_I32);
1823 gen_op_xor32(dest, src, reg);
1824 gen_logic_cc(s, dest);
1825 DEST_EA(insn, OS_LONG, dest, &addr);
1835 reg = DREG(insn, 9);
1836 dest = gen_new_qreg(QMODE_I32);
1838 SRC_EA(src, OS_LONG, 0, &addr);
1839 gen_op_and32(dest, src, reg);
1840 DEST_EA(insn, OS_LONG, dest, &addr);
1842 SRC_EA(src, OS_LONG, 0, NULL);
1843 gen_op_and32(dest, src, reg);
1844 gen_op_mov32(reg, dest);
1846 gen_logic_cc(s, dest);
1854 SRC_EA(src, OS_LONG, 0, NULL);
1855 reg = AREG(insn, 9);
1856 gen_op_add32(reg, reg, src);
1867 reg = DREG(insn, 9);
1868 src = DREG(insn, 0);
1869 dest = gen_new_qreg(QMODE_I32);
1870 gen_op_mov32 (dest, reg);
1871 gen_op_addx_cc(dest, src);
1873 tmp = gen_new_qreg(QMODE_I32);
1874 gen_op_mov32 (tmp, QREG_CC_DEST);
1875 gen_op_update_cc_add(dest, src);
1876 gen_op_mov32(reg, dest);
1877 s->cc_op = CC_OP_DYNAMIC;
1879 gen_op_or32(tmp, tmp, gen_im32(~CCF_Z));
1880 gen_op_and32(QREG_CC_DEST, QREG_CC_DEST, tmp);
1881 s->cc_op = CC_OP_FLAGS;
1884 DISAS_INSN(shift_im)
1889 reg = DREG(insn, 0);
1890 tmp = (insn >> 9) & 7;
1894 gen_op_shl_im_cc(reg, tmp);
1895 s->cc_op = CC_OP_SHL;
1898 gen_op_shr_im_cc(reg, tmp);
1899 s->cc_op = CC_OP_SHR;
1901 gen_op_sar_im_cc(reg, tmp);
1902 s->cc_op = CC_OP_SAR;
1907 DISAS_INSN(shift_reg)
1913 reg = DREG(insn, 0);
1914 src = DREG(insn, 9);
1915 tmp = gen_new_qreg(QMODE_I32);
1916 gen_op_and32(tmp, src, gen_im32(63));
1918 gen_op_shl_cc(reg, tmp);
1919 s->cc_op = CC_OP_SHL;
1922 gen_op_shr_cc(reg, tmp);
1923 s->cc_op = CC_OP_SHR;
1925 gen_op_sar_cc(reg, tmp);
1926 s->cc_op = CC_OP_SAR;
1934 reg = DREG(insn, 0);
1935 gen_logic_cc(s, reg);
1936 gen_op_ff1(reg, reg);
1939 static int gen_get_sr(DisasContext *s)
1944 ccr = gen_get_ccr(s);
1945 sr = gen_new_qreg(QMODE_I32);
1946 gen_op_and32(sr, QREG_SR, gen_im32(0xffe0));
1947 gen_op_or32(sr, sr, ccr);
1957 ext = lduw_code(s->pc);
1959 if (ext != 0x46FC) {
1960 gen_exception(s, addr, EXCP_UNSUPPORTED);
1963 ext = lduw_code(s->pc);
1965 if (IS_USER(s) || (ext & SR_S) == 0) {
1966 gen_exception(s, addr, EXCP_PRIVILEGE);
1969 gen_push(s, gen_get_sr(s));
1970 gen_set_sr_im(s, ext, 0);
1973 DISAS_INSN(move_from_sr)
1979 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
1983 reg = DREG(insn, 0);
1984 gen_partset_reg(OS_WORD, reg, sr);
1987 DISAS_INSN(move_to_sr)
1990 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
1993 gen_set_sr(s, insn, 0);
1997 DISAS_INSN(move_from_usp)
2000 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2003 /* TODO: Implement USP. */
2004 gen_exception(s, s->pc - 2, EXCP_ILLEGAL);
2007 DISAS_INSN(move_to_usp)
2010 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2013 /* TODO: Implement USP. */
2014 gen_exception(s, s->pc - 2, EXCP_ILLEGAL);
2019 gen_jmp(s, gen_im32(s->pc));
2028 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2032 ext = lduw_code(s->pc);
2035 gen_set_sr_im(s, ext, 0);
2036 gen_jmp(s, gen_im32(s->pc));
2043 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2046 gen_exception(s, s->pc - 2, EXCP_RTE);
2055 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2059 ext = lduw_code(s->pc);
2063 reg = AREG(ext, 12);
2065 reg = DREG(ext, 12);
2067 gen_op_movec(gen_im32(ext & 0xfff), reg);
2074 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2077 /* ICache fetch. Implement as no-op. */
2083 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2086 /* Cache push/invalidate. Implement as no-op. */
2091 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2097 gen_exception(s, s->pc - 2, EXCP_PRIVILEGE);
2100 /* TODO: Implement wdebug. */
2101 qemu_assert(0, "WDEBUG not implemented");
2106 gen_exception(s, s->pc - 2, EXCP_TRAP0 + (insn & 0xf));
2109 /* ??? FP exceptions are not implemented. Most exceptions are deferred until
2110 immediately before the next FP instruction is executed. */
2121 ext = lduw_code(s->pc);
2123 opmode = ext & 0x7f;
2124 switch ((ext >> 13) & 7) {
2129 case 3: /* fmove out */
2132 /* ??? TODO: Proper behavior on overflow. */
2133 switch ((ext >> 10) & 7) {
2136 res = gen_new_qreg(QMODE_I32);
2137 gen_op_f64_to_i32(res, src);
2141 res = gen_new_qreg(QMODE_F32);
2142 gen_op_f64_to_f32(res, src);
2146 res = gen_new_qreg(QMODE_I32);
2147 gen_op_f64_to_i32(res, src);
2155 res = gen_new_qreg(QMODE_I32);
2156 gen_op_f64_to_i32(res, src);
2161 DEST_EA(insn, opsize, res, NULL);
2163 case 4: /* fmove to control register. */
2164 switch ((ext >> 10) & 7) {
2166 /* Not implemented. Ignore writes. */
2171 cpu_abort(NULL, "Unimplemented: fmove to control %d",
2175 case 5: /* fmove from control register. */
2176 switch ((ext >> 10) & 7) {
2178 /* Not implemented. Always return zero. */
2184 cpu_abort(NULL, "Unimplemented: fmove from control %d",
2188 DEST_EA(insn, OS_LONG, res, NULL);
2190 case 6: /* fmovem */
2195 if ((ext & 0x1f00) != 0x1000 || (ext & 0xff) == 0)
2197 src = gen_lea(s, insn, OS_LONG);
2202 addr = gen_new_qreg(QMODE_I32);
2203 gen_op_mov32(addr, src);
2208 if (ext & (1 << 13)) {
2210 gen_st(s, f64, addr, dest);
2213 gen_ld(s, f64, dest, addr);
2215 if (ext & (mask - 1))
2216 gen_op_add32(addr, addr, gen_im32(8));
2224 if (ext & (1 << 14)) {
2227 /* Source effective address. */
2228 switch ((ext >> 10) & 7) {
2229 case 0: opsize = OS_LONG; break;
2230 case 1: opsize = OS_SINGLE; break;
2231 case 4: opsize = OS_WORD; break;
2232 case 5: opsize = OS_DOUBLE; break;
2233 case 6: opsize = OS_BYTE; break;
2237 SRC_EA(tmp, opsize, -1, NULL);
2238 if (opsize == OS_DOUBLE) {
2241 src = gen_new_qreg(QMODE_F64);
2246 gen_op_i32_to_f64(src, tmp);
2249 gen_op_f32_to_f64(src, tmp);
2254 /* Source register. */
2255 src = FREG(ext, 10);
2257 dest = FREG(ext, 7);
2258 res = gen_new_qreg(QMODE_F64);
2260 gen_op_movf64(res, dest);
2263 case 0: case 0x40: case 0x44: /* fmove */
2264 gen_op_movf64(res, src);
2267 gen_op_iround_f64(res, src);
2270 case 3: /* fintrz */
2271 gen_op_itrunc_f64(res, src);
2274 case 4: case 0x41: case 0x45: /* fsqrt */
2275 gen_op_sqrtf64(res, src);
2277 case 0x18: case 0x58: case 0x5c: /* fabs */
2278 gen_op_absf64(res, src);
2280 case 0x1a: case 0x5a: case 0x5e: /* fneg */
2281 gen_op_chsf64(res, src);
2283 case 0x20: case 0x60: case 0x64: /* fdiv */
2284 gen_op_divf64(res, res, src);
2286 case 0x22: case 0x62: case 0x66: /* fadd */
2287 gen_op_addf64(res, res, src);
2289 case 0x23: case 0x63: case 0x67: /* fmul */
2290 gen_op_mulf64(res, res, src);
2292 case 0x28: case 0x68: case 0x6c: /* fsub */
2293 gen_op_subf64(res, res, src);
2295 case 0x38: /* fcmp */
2296 gen_op_sub_cmpf64(res, res, src);
2300 case 0x3a: /* ftst */
2301 gen_op_movf64(res, src);
2309 if (opmode & 0x40) {
2310 if ((opmode & 0x4) != 0)
2312 } else if ((s->fpcr & M68K_FPCR_PREC) == 0) {
2319 tmp = gen_new_qreg(QMODE_F32);
2320 gen_op_f64_to_f32(tmp, res);
2321 gen_op_f32_to_f64(res, tmp);
2323 gen_op_fp_result(res);
2325 gen_op_movf64(dest, res);
2330 disas_undef_fpu(s, insn);
2342 offset = ldsw_code(s->pc);
2344 if (insn & (1 << 6)) {
2345 offset = (offset << 16) | lduw_code(s->pc);
2349 l1 = gen_new_label();
2350 /* TODO: Raise BSUN exception. */
2351 flag = gen_new_qreg(QMODE_I32);
2352 zero = gen_new_qreg(QMODE_F64);
2353 gen_op_zerof64(zero);
2354 gen_op_compare_quietf64(flag, QREG_FP_RESULT, zero);
2355 /* Jump to l1 if condition is true. */
2356 switch (insn & 0xf) {
2359 case 1: /* eq (=0) */
2360 gen_op_jmp_z32(flag, l1);
2362 case 2: /* ogt (=1) */
2363 gen_op_sub32(flag, flag, gen_im32(1));
2364 gen_op_jmp_z32(flag, l1);
2366 case 3: /* oge (=0 or =1) */
2367 gen_op_jmp_z32(flag, l1);
2368 gen_op_sub32(flag, flag, gen_im32(1));
2369 gen_op_jmp_z32(flag, l1);
2371 case 4: /* olt (=-1) */
2372 gen_op_jmp_s32(flag, l1);
2374 case 5: /* ole (=-1 or =0) */
2375 gen_op_jmp_s32(flag, l1);
2376 gen_op_jmp_z32(flag, l1);
2378 case 6: /* ogl (=-1 or =1) */
2379 gen_op_jmp_s32(flag, l1);
2380 gen_op_sub32(flag, flag, gen_im32(1));
2381 gen_op_jmp_z32(flag, l1);
2383 case 7: /* or (=2) */
2384 gen_op_sub32(flag, flag, gen_im32(2));
2385 gen_op_jmp_z32(flag, l1);
2387 case 8: /* un (<2) */
2388 gen_op_sub32(flag, flag, gen_im32(2));
2389 gen_op_jmp_s32(flag, l1);
2391 case 9: /* ueq (=0 or =2) */
2392 gen_op_jmp_z32(flag, l1);
2393 gen_op_sub32(flag, flag, gen_im32(2));
2394 gen_op_jmp_z32(flag, l1);
2396 case 10: /* ugt (>0) */
2397 /* ??? Add jmp_gtu. */
2398 gen_op_sub32(flag, flag, gen_im32(1));
2399 gen_op_jmp_ns32(flag, l1);
2401 case 11: /* uge (>=0) */
2402 gen_op_jmp_ns32(flag, l1);
2404 case 12: /* ult (=-1 or =2) */
2405 gen_op_jmp_s32(flag, l1);
2406 gen_op_sub32(flag, flag, gen_im32(2));
2407 gen_op_jmp_z32(flag, l1);
2409 case 13: /* ule (!=1) */
2410 gen_op_sub32(flag, flag, gen_im32(1));
2411 gen_op_jmp_nz32(flag, l1);
2413 case 14: /* ne (!=0) */
2414 gen_op_jmp_nz32(flag, l1);
2417 gen_op_mov32(flag, gen_im32(1));
2420 gen_jmp_tb(s, 0, s->pc);
2422 gen_jmp_tb(s, 1, addr + offset);
2425 DISAS_INSN(frestore)
2427 /* TODO: Implement frestore. */
2428 qemu_assert(0, "FRESTORE not implemented");
2433 /* TODO: Implement fsave. */
2434 qemu_assert(0, "FSAVE not implemented");
2437 static inline int gen_mac_extract_word(DisasContext *s, int val, int upper)
2439 int tmp = gen_new_qreg(QMODE_I32);
2440 if (s->env->macsr & MACSR_FI) {
2442 gen_op_and32(tmp, val, gen_im32(0xffff0000));
2444 gen_op_shl32(tmp, val, gen_im32(16));
2445 } else if (s->env->macsr & MACSR_SU) {
2447 gen_op_sar32(tmp, val, gen_im32(16));
2449 gen_op_ext16s32(tmp, val);
2452 gen_op_shr32(tmp, val, gen_im32(16));
2454 gen_op_ext16u32(tmp, val);
2470 int saved_flags = -1;
2472 ext = lduw_code(s->pc);
2475 acc = ((insn >> 7) & 1) | ((ext >> 3) & 2);
2476 dual = ((insn & 0x30) != 0 && (ext & 3) != 0);
2477 if (dual && !m68k_feature(s->env, M68K_FEATURE_CF_EMAC_B)) {
2478 disas_undef(s, insn);
2482 /* MAC with load. */
2483 tmp = gen_lea(s, insn, OS_LONG);
2484 addr = gen_new_qreg(QMODE_I32);
2485 gen_op_and32(addr, tmp, QREG_MAC_MASK);
2486 /* Load the value now to ensure correct exception behavior.
2487 Perform writeback after reading the MAC inputs. */
2488 loadval = gen_load(s, OS_LONG, addr, 0);
2491 rx = (ext & 0x8000) ? AREG(ext, 12) : DREG(insn, 12);
2492 ry = (ext & 8) ? AREG(ext, 0) : DREG(ext, 0);
2494 loadval = addr = -1;
2495 rx = (insn & 0x40) ? AREG(insn, 9) : DREG(insn, 9);
2496 ry = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
2499 gen_op_mac_clear_flags();
2501 if ((s->env->macsr & MACSR_OMC) != 0 && !dual) {
2502 /* Skip the multiply if we know we will ignore it. */
2503 l1 = gen_new_label();
2504 tmp = gen_new_qreg(QMODE_I32);
2505 gen_op_and32(tmp, QREG_MACSR, gen_im32(1 << (acc + 8)));
2506 gen_op_jmp_nz32(tmp, l1);
2509 if ((ext & 0x0800) == 0) {
2511 rx = gen_mac_extract_word(s, rx, (ext & 0x80) != 0);
2512 ry = gen_mac_extract_word(s, ry, (ext & 0x40) != 0);
2514 if (s->env->macsr & MACSR_FI) {
2515 gen_op_macmulf(rx, ry);
2517 if (s->env->macsr & MACSR_SU)
2518 gen_op_macmuls(rx, ry);
2520 gen_op_macmulu(rx, ry);
2521 switch ((ext >> 9) & 3) {
2532 /* Save the overflow flag from the multiply. */
2533 saved_flags = gen_new_qreg(QMODE_I32);
2534 gen_op_mov32(saved_flags, QREG_MACSR);
2537 if ((s->env->macsr & MACSR_OMC) != 0 && dual) {
2538 /* Skip the accumulate if the value is already saturated. */
2539 l1 = gen_new_label();
2540 tmp = gen_new_qreg(QMODE_I32);
2541 gen_op_and32(tmp, QREG_MACSR, gen_im32(MACSR_PAV0 << acc));
2542 gen_op_jmp_nz32(tmp, l1);
2550 if (s->env->macsr & MACSR_FI)
2551 gen_op_macsatf(acc);
2552 else if (s->env->macsr & MACSR_SU)
2553 gen_op_macsats(acc);
2555 gen_op_macsatu(acc);
2561 /* Dual accumulate variant. */
2562 acc = (ext >> 2) & 3;
2563 /* Restore the overflow flag from the multiplier. */
2564 gen_op_mov32(QREG_MACSR, saved_flags);
2565 if ((s->env->macsr & MACSR_OMC) != 0) {
2566 /* Skip the accumulate if the value is already saturated. */
2567 l1 = gen_new_label();
2568 tmp = gen_new_qreg(QMODE_I32);
2569 gen_op_and32(tmp, QREG_MACSR, gen_im32(MACSR_PAV0 << acc));
2570 gen_op_jmp_nz32(tmp, l1);
2576 if (s->env->macsr & MACSR_FI)
2577 gen_op_macsatf(acc);
2578 else if (s->env->macsr & MACSR_SU)
2579 gen_op_macsats(acc);
2581 gen_op_macsatu(acc);
2585 gen_op_mac_set_flags(acc);
2589 rw = (insn & 0x40) ? AREG(insn, 9) : DREG(insn, 9);
2590 gen_op_mov32(rw, loadval);
2591 /* FIXME: Should address writeback happen with the masked or
2593 switch ((insn >> 3) & 7) {
2594 case 3: /* Post-increment. */
2595 gen_op_add32(AREG(insn, 0), addr, gen_im32(4));
2597 case 4: /* Pre-decrement. */
2598 gen_op_mov32(AREG(insn, 0), addr);
2603 DISAS_INSN(from_mac)
2608 rx = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
2609 acc = (insn >> 9) & 3;
2610 if (s->env->macsr & MACSR_FI) {
2611 gen_op_get_macf(rx, acc);
2612 } else if ((s->env->macsr & MACSR_OMC) == 0) {
2613 gen_op_get_maci(rx, acc);
2614 } else if (s->env->macsr & MACSR_SU) {
2615 gen_op_get_macs(rx, acc);
2617 gen_op_get_macu(rx, acc);
2620 gen_op_clear_mac(acc);
2623 DISAS_INSN(move_mac)
2628 dest = (insn >> 9) & 3;
2629 gen_op_move_mac(dest, src);
2630 gen_op_mac_clear_flags();
2631 gen_op_mac_set_flags(dest);
2634 DISAS_INSN(from_macsr)
2638 reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
2639 gen_op_mov32(reg, QREG_MACSR);
2642 DISAS_INSN(from_mask)
2645 reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
2646 gen_op_mov32(reg, QREG_MAC_MASK);
2649 DISAS_INSN(from_mext)
2653 reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0);
2654 acc = (insn & 0x400) ? 2 : 0;
2655 if (s->env->macsr & MACSR_FI)
2656 gen_op_get_mac_extf(reg, acc);
2658 gen_op_get_mac_exti(reg, acc);
2661 DISAS_INSN(macsr_to_ccr)
2663 gen_op_mov32(QREG_CC_X, gen_im32(0));
2664 gen_op_and32(QREG_CC_DEST, QREG_MACSR, gen_im32(0xf));
2665 s->cc_op = CC_OP_FLAGS;
2672 acc = (insn >>9) & 3;
2673 SRC_EA(val, OS_LONG, 0, NULL);
2674 if (s->env->macsr & MACSR_FI) {
2675 gen_op_set_macf(val, acc);
2676 } else if (s->env->macsr & MACSR_SU) {
2677 gen_op_set_macs(val, acc);
2679 gen_op_set_macu(val, acc);
2681 gen_op_mac_clear_flags();
2682 gen_op_mac_set_flags(acc);
2685 DISAS_INSN(to_macsr)
2688 SRC_EA(val, OS_LONG, 0, NULL);
2689 gen_op_set_macsr(val);
2696 SRC_EA(val, OS_LONG, 0, NULL);
2697 gen_op_or32(QREG_MAC_MASK, val, gen_im32(0xffff0000));
2704 SRC_EA(val, OS_LONG, 0, NULL);
2705 acc = (insn & 0x400) ? 2 : 0;
2706 if (s->env->macsr & MACSR_FI)
2707 gen_op_set_mac_extf(val, acc);
2708 else if (s->env->macsr & MACSR_SU)
2709 gen_op_set_mac_exts(val, acc);
2711 gen_op_set_mac_extu(val, acc);
2714 static disas_proc opcode_table[65536];
2717 register_opcode (disas_proc proc, uint16_t opcode, uint16_t mask)
2723 /* Sanity check. All set bits must be included in the mask. */
2724 if (opcode & ~mask) {
2726 "qemu internal error: bogus opcode definition %04x/%04x\n",
2730 /* This could probably be cleverer. For now just optimize the case where
2731 the top bits are known. */
2732 /* Find the first zero bit in the mask. */
2734 while ((i & mask) != 0)
2736 /* Iterate over all combinations of this and lower bits. */
2741 from = opcode & ~(i - 1);
2743 for (i = from; i < to; i++) {
2744 if ((i & mask) == opcode)
2745 opcode_table[i] = proc;
2749 /* Register m68k opcode handlers. Order is important.
2750 Later insn override earlier ones. */
2751 void register_m68k_insns (CPUM68KState *env)
2753 #define INSN(name, opcode, mask, feature) do { \
2754 if (m68k_feature(env, M68K_FEATURE_##feature)) \
2755 register_opcode(disas_##name, 0x##opcode, 0x##mask); \
2757 INSN(undef, 0000, 0000, CF_ISA_A);
2758 INSN(arith_im, 0080, fff8, CF_ISA_A);
2759 INSN(bitrev, 00c0, fff8, CF_ISA_APLUSC);
2760 INSN(bitop_reg, 0100, f1c0, CF_ISA_A);
2761 INSN(bitop_reg, 0140, f1c0, CF_ISA_A);
2762 INSN(bitop_reg, 0180, f1c0, CF_ISA_A);
2763 INSN(bitop_reg, 01c0, f1c0, CF_ISA_A);
2764 INSN(arith_im, 0280, fff8, CF_ISA_A);
2765 INSN(byterev, 02c0, fff8, CF_ISA_APLUSC);
2766 INSN(arith_im, 0480, fff8, CF_ISA_A);
2767 INSN(ff1, 04c0, fff8, CF_ISA_APLUSC);
2768 INSN(arith_im, 0680, fff8, CF_ISA_A);
2769 INSN(bitop_im, 0800, ffc0, CF_ISA_A);
2770 INSN(bitop_im, 0840, ffc0, CF_ISA_A);
2771 INSN(bitop_im, 0880, ffc0, CF_ISA_A);
2772 INSN(bitop_im, 08c0, ffc0, CF_ISA_A);
2773 INSN(arith_im, 0a80, fff8, CF_ISA_A);
2774 INSN(arith_im, 0c00, ff38, CF_ISA_A);
2775 INSN(move, 1000, f000, CF_ISA_A);
2776 INSN(move, 2000, f000, CF_ISA_A);
2777 INSN(move, 3000, f000, CF_ISA_A);
2778 INSN(strldsr, 40e7, ffff, CF_ISA_APLUSC);
2779 INSN(negx, 4080, fff8, CF_ISA_A);
2780 INSN(move_from_sr, 40c0, fff8, CF_ISA_A);
2781 INSN(lea, 41c0, f1c0, CF_ISA_A);
2782 INSN(clr, 4200, ff00, CF_ISA_A);
2783 INSN(undef, 42c0, ffc0, CF_ISA_A);
2784 INSN(move_from_ccr, 42c0, fff8, CF_ISA_A);
2785 INSN(neg, 4480, fff8, CF_ISA_A);
2786 INSN(move_to_ccr, 44c0, ffc0, CF_ISA_A);
2787 INSN(not, 4680, fff8, CF_ISA_A);
2788 INSN(move_to_sr, 46c0, ffc0, CF_ISA_A);
2789 INSN(pea, 4840, ffc0, CF_ISA_A);
2790 INSN(swap, 4840, fff8, CF_ISA_A);
2791 INSN(movem, 48c0, fbc0, CF_ISA_A);
2792 INSN(ext, 4880, fff8, CF_ISA_A);
2793 INSN(ext, 48c0, fff8, CF_ISA_A);
2794 INSN(ext, 49c0, fff8, CF_ISA_A);
2795 INSN(tst, 4a00, ff00, CF_ISA_A);
2796 INSN(tas, 4ac0, ffc0, CF_ISA_B);
2797 INSN(halt, 4ac8, ffff, CF_ISA_A);
2798 INSN(pulse, 4acc, ffff, CF_ISA_A);
2799 INSN(illegal, 4afc, ffff, CF_ISA_A);
2800 INSN(mull, 4c00, ffc0, CF_ISA_A);
2801 INSN(divl, 4c40, ffc0, CF_ISA_A);
2802 INSN(sats, 4c80, fff8, CF_ISA_B);
2803 INSN(trap, 4e40, fff0, CF_ISA_A);
2804 INSN(link, 4e50, fff8, CF_ISA_A);
2805 INSN(unlk, 4e58, fff8, CF_ISA_A);
2806 INSN(move_to_usp, 4e60, fff8, USP);
2807 INSN(move_from_usp, 4e68, fff8, USP);
2808 INSN(nop, 4e71, ffff, CF_ISA_A);
2809 INSN(stop, 4e72, ffff, CF_ISA_A);
2810 INSN(rte, 4e73, ffff, CF_ISA_A);
2811 INSN(rts, 4e75, ffff, CF_ISA_A);
2812 INSN(movec, 4e7b, ffff, CF_ISA_A);
2813 INSN(jump, 4e80, ffc0, CF_ISA_A);
2814 INSN(jump, 4ec0, ffc0, CF_ISA_A);
2815 INSN(addsubq, 5180, f1c0, CF_ISA_A);
2816 INSN(scc, 50c0, f0f8, CF_ISA_A);
2817 INSN(addsubq, 5080, f1c0, CF_ISA_A);
2818 INSN(tpf, 51f8, fff8, CF_ISA_A);
2820 /* Branch instructions. */
2821 INSN(branch, 6000, f000, CF_ISA_A);
2822 /* Disable long branch instructions, then add back the ones we want. */
2823 INSN(undef, 60ff, f0ff, CF_ISA_A); /* All long branches. */
2824 INSN(branch, 60ff, f0ff, CF_ISA_B);
2825 INSN(undef, 60ff, ffff, CF_ISA_B); /* bra.l */
2826 INSN(branch, 60ff, ffff, BRAL);
2828 INSN(moveq, 7000, f100, CF_ISA_A);
2829 INSN(mvzs, 7100, f100, CF_ISA_B);
2830 INSN(or, 8000, f000, CF_ISA_A);
2831 INSN(divw, 80c0, f0c0, CF_ISA_A);
2832 INSN(addsub, 9000, f000, CF_ISA_A);
2833 INSN(subx, 9180, f1f8, CF_ISA_A);
2834 INSN(suba, 91c0, f1c0, CF_ISA_A);
2836 INSN(undef_mac, a000, f000, CF_ISA_A);
2837 INSN(mac, a000, f100, CF_EMAC);
2838 INSN(from_mac, a180, f9b0, CF_EMAC);
2839 INSN(move_mac, a110, f9fc, CF_EMAC);
2840 INSN(from_macsr,a980, f9f0, CF_EMAC);
2841 INSN(from_mask, ad80, fff0, CF_EMAC);
2842 INSN(from_mext, ab80, fbf0, CF_EMAC);
2843 INSN(macsr_to_ccr, a9c0, ffff, CF_EMAC);
2844 INSN(to_mac, a100, f9c0, CF_EMAC);
2845 INSN(to_macsr, a900, ffc0, CF_EMAC);
2846 INSN(to_mext, ab00, fbc0, CF_EMAC);
2847 INSN(to_mask, ad00, ffc0, CF_EMAC);
2849 INSN(mov3q, a140, f1c0, CF_ISA_B);
2850 INSN(cmp, b000, f1c0, CF_ISA_B); /* cmp.b */
2851 INSN(cmp, b040, f1c0, CF_ISA_B); /* cmp.w */
2852 INSN(cmpa, b0c0, f1c0, CF_ISA_B); /* cmpa.w */
2853 INSN(cmp, b080, f1c0, CF_ISA_A);
2854 INSN(cmpa, b1c0, f1c0, CF_ISA_A);
2855 INSN(eor, b180, f1c0, CF_ISA_A);
2856 INSN(and, c000, f000, CF_ISA_A);
2857 INSN(mulw, c0c0, f0c0, CF_ISA_A);
2858 INSN(addsub, d000, f000, CF_ISA_A);
2859 INSN(addx, d180, f1f8, CF_ISA_A);
2860 INSN(adda, d1c0, f1c0, CF_ISA_A);
2861 INSN(shift_im, e080, f0f0, CF_ISA_A);
2862 INSN(shift_reg, e0a0, f0f0, CF_ISA_A);
2863 INSN(undef_fpu, f000, f000, CF_ISA_A);
2864 INSN(fpu, f200, ffc0, CF_FPU);
2865 INSN(fbcc, f280, ffc0, CF_FPU);
2866 INSN(frestore, f340, ffc0, CF_FPU);
2867 INSN(fsave, f340, ffc0, CF_FPU);
2868 INSN(intouch, f340, ffc0, CF_ISA_A);
2869 INSN(cpushl, f428, ff38, CF_ISA_A);
2870 INSN(wddata, fb00, ff00, CF_ISA_A);
2871 INSN(wdebug, fbc0, ffc0, CF_ISA_A);
2875 /* ??? Some of this implementation is not exception safe. We should always
2876 write back the result to memory before setting the condition codes. */
2877 static void disas_m68k_insn(CPUState * env, DisasContext *s)
2881 insn = lduw_code(s->pc);
2884 opcode_table[insn](s, insn);
2888 /* Save the result of a floating point operation. */
2889 static void expand_op_fp_result(qOP *qop)
2891 gen_op_movf64(QREG_FP_RESULT, qop->args[0]);
2894 /* Dummy op to indicate that the flags have been set. */
2895 static void expand_op_flags_set(qOP *qop)
2899 /* Convert the confition codes into CC_OP_FLAGS format. */
2900 static void expand_op_flush_flags(qOP *qop)
2904 if (qop->args[0] == CC_OP_DYNAMIC)
2905 cc_opreg = QREG_CC_OP;
2907 cc_opreg = gen_im32(qop->args[0]);
2908 gen_op_helper32(QREG_NULL, cc_opreg, HELPER_flush_flags);
2911 /* Set CC_DEST after a logical or direct flag setting operation. */
2912 static void expand_op_logic_cc(qOP *qop)
2914 gen_op_mov32(QREG_CC_DEST, qop->args[0]);
2917 /* Set CC_SRC and CC_DEST after an arithmetic operation. */
2918 static void expand_op_update_cc_add(qOP *qop)
2920 gen_op_mov32(QREG_CC_DEST, qop->args[0]);
2921 gen_op_mov32(QREG_CC_SRC, qop->args[1]);
2924 /* Update the X flag. */
2925 static void expand_op_update_xflag(qOP *qop)
2930 arg0 = qop->args[0];
2931 arg1 = qop->args[1];
2932 if (arg1 == QREG_NULL) {
2934 gen_op_mov32(QREG_CC_X, arg0);
2936 /* CC_X = arg0 < (unsigned)arg1. */
2937 gen_op_set_ltu32(QREG_CC_X, arg0, arg1);
2941 /* Set arg0 to the contents of the X flag. */
2942 static void expand_op_get_xflag(qOP *qop)
2944 gen_op_mov32(qop->args[0], QREG_CC_X);
2947 /* Expand a shift by immediate. The ISA only allows shifts by 1-8, so we
2948 already know the shift is within range. */
2949 static inline void expand_shift_im(qOP *qop, int right, int arith)
2959 val = gen_new_qreg(QMODE_I32);
2960 gen_op_mov32(val, reg);
2961 gen_op_mov32(QREG_CC_DEST, val);
2962 gen_op_mov32(QREG_CC_SRC, tmp);
2965 gen_op_sar32(reg, val, tmp);
2967 gen_op_shr32(reg, val, tmp);
2972 tmp = gen_im32(im - 1);
2974 gen_op_shl32(reg, val, tmp);
2975 tmp = gen_im32(32 - im);
2977 if (tmp != QREG_NULL)
2978 gen_op_shr32(val, val, tmp);
2979 gen_op_and32(QREG_CC_X, val, gen_im32(1));
2982 static void expand_op_shl_im_cc(qOP *qop)
2984 expand_shift_im(qop, 0, 0);
2987 static void expand_op_shr_im_cc(qOP *qop)
2989 expand_shift_im(qop, 1, 0);
2992 static void expand_op_sar_im_cc(qOP *qop)
2994 expand_shift_im(qop, 1, 1);
2997 /* Expand a shift by register. */
2998 /* ??? This gives incorrect answers for shifts by 0 or >= 32 */
2999 static inline void expand_shift_reg(qOP *qop, int right, int arith)
3007 shift = qop->args[1];
3008 val = gen_new_qreg(QMODE_I32);
3009 gen_op_mov32(val, reg);
3010 gen_op_mov32(QREG_CC_DEST, val);
3011 gen_op_mov32(QREG_CC_SRC, shift);
3012 tmp = gen_new_qreg(QMODE_I32);
3015 gen_op_sar32(reg, val, shift);
3017 gen_op_shr32(reg, val, shift);
3019 gen_op_sub32(tmp, shift, gen_im32(1));
3021 gen_op_shl32(reg, val, shift);
3022 gen_op_sub32(tmp, gen_im32(31), shift);
3024 gen_op_shl32(val, val, tmp);
3025 gen_op_and32(QREG_CC_X, val, gen_im32(1));
3028 static void expand_op_shl_cc(qOP *qop)
3030 expand_shift_reg(qop, 0, 0);
3033 static void expand_op_shr_cc(qOP *qop)
3035 expand_shift_reg(qop, 1, 0);
3038 static void expand_op_sar_cc(qOP *qop)
3040 expand_shift_reg(qop, 1, 1);
3043 /* Set the Z flag to (arg0 & arg1) == 0. */
3044 static void expand_op_btest(qOP *qop)
3049 l1 = gen_new_label();
3050 tmp = gen_new_qreg(QMODE_I32);
3051 gen_op_and32(tmp, qop->args[0], qop->args[1]);
3052 gen_op_and32(QREG_CC_DEST, QREG_CC_DEST, gen_im32(~(uint32_t)CCF_Z));
3053 gen_op_jmp_nz32(tmp, l1);
3054 gen_op_or32(QREG_CC_DEST, QREG_CC_DEST, gen_im32(CCF_Z));
3058 /* arg0 += arg1 + CC_X */
3059 static void expand_op_addx_cc(qOP *qop)
3061 int arg0 = qop->args[0];
3062 int arg1 = qop->args[1];
3065 gen_op_add32 (arg0, arg0, arg1);
3066 l1 = gen_new_label();
3067 l2 = gen_new_label();
3068 gen_op_jmp_z32(QREG_CC_X, l1);
3069 gen_op_add32(arg0, arg0, gen_im32(1));
3070 gen_op_mov32(QREG_CC_OP, gen_im32(CC_OP_ADDX));
3071 gen_op_set_leu32(QREG_CC_X, arg0, arg1);
3074 gen_op_mov32(QREG_CC_OP, gen_im32(CC_OP_ADD));
3075 gen_op_set_ltu32(QREG_CC_X, arg0, arg1);
3079 /* arg0 -= arg1 + CC_X */
3080 static void expand_op_subx_cc(qOP *qop)
3082 int arg0 = qop->args[0];
3083 int arg1 = qop->args[1];
3086 l1 = gen_new_label();
3087 l2 = gen_new_label();
3088 gen_op_jmp_z32(QREG_CC_X, l1);
3089 gen_op_set_leu32(QREG_CC_X, arg0, arg1);
3090 gen_op_sub32(arg0, arg0, gen_im32(1));
3091 gen_op_mov32(QREG_CC_OP, gen_im32(CC_OP_SUBX));
3094 gen_op_set_ltu32(QREG_CC_X, arg0, arg1);
3095 gen_op_mov32(QREG_CC_OP, gen_im32(CC_OP_SUB));
3097 gen_op_sub32 (arg0, arg0, arg1);
3100 /* Expand target specific ops to generic qops. */
3101 static void expand_target_qops(void)
3107 /* Copy the list of qops, expanding target specific ops as we go. */
3108 qop = gen_first_qop;
3109 gen_first_qop = NULL;
3110 gen_last_qop = NULL;
3111 for (; qop; qop = next) {
3114 if (c < FIRST_TARGET_OP) {
3115 qop->prev = gen_last_qop;
3118 gen_last_qop->next = qop;
3120 gen_first_qop = qop;
3125 #define DEF(name, nargs, barrier) \
3126 case INDEX_op_##name: \
3127 expand_op_##name(qop); \
3129 #include "qop-target.def"
3132 cpu_abort(NULL, "Unexpanded target qop");
3137 /* ??? Implement this. */
3139 optimize_flags(void)
3144 /* generate intermediate code for basic block 'tb'. */
3146 gen_intermediate_code_internal(CPUState *env, TranslationBlock *tb,
3149 DisasContext dc1, *dc = &dc1;
3150 uint16_t *gen_opc_end;
3152 target_ulong pc_start;
3156 /* generate intermediate code */
3161 gen_opc_ptr = gen_opc_buf;
3162 gen_opc_end = gen_opc_buf + OPC_MAX_SIZE;
3163 gen_opparam_ptr = gen_opparam_buf;
3166 dc->is_jmp = DISAS_NEXT;
3168 dc->cc_op = CC_OP_DYNAMIC;
3169 dc->singlestep_enabled = env->singlestep_enabled;
3170 dc->fpcr = env->fpcr;
3171 dc->user = (env->sr & SR_S) == 0;
3176 pc_offset = dc->pc - pc_start;
3177 gen_throws_exception = NULL;
3178 if (env->nb_breakpoints > 0) {
3179 for(j = 0; j < env->nb_breakpoints; j++) {
3180 if (env->breakpoints[j] == dc->pc) {
3181 gen_exception(dc, dc->pc, EXCP_DEBUG);
3182 dc->is_jmp = DISAS_JUMP;
3190 j = gen_opc_ptr - gen_opc_buf;
3194 gen_opc_instr_start[lj++] = 0;
3196 gen_opc_pc[lj] = dc->pc;
3197 gen_opc_instr_start[lj] = 1;
3199 last_cc_op = dc->cc_op;
3200 dc->insn_pc = dc->pc;
3201 disas_m68k_insn(env, dc);
3202 } while (!dc->is_jmp && gen_opc_ptr < gen_opc_end &&
3203 !env->singlestep_enabled &&
3204 (pc_offset) < (TARGET_PAGE_SIZE - 32));
3206 if (__builtin_expect(env->singlestep_enabled, 0)) {
3207 /* Make sure the pc is updated, and raise a debug exception. */
3209 gen_flush_cc_op(dc);
3210 gen_op_mov32(QREG_PC, gen_im32((long)dc->pc));
3212 gen_op_raise_exception(EXCP_DEBUG);
3214 switch(dc->is_jmp) {
3216 gen_flush_cc_op(dc);
3217 gen_jmp_tb(dc, 0, dc->pc);
3222 gen_flush_cc_op(dc);
3223 /* indicate that the hash table must be used to find the next TB */
3224 gen_op_mov32(QREG_T0, gen_im32(0));
3228 /* nothing more to generate */
3232 *gen_opc_ptr = INDEX_op_end;
3235 if (loglevel & CPU_LOG_TB_IN_ASM) {
3236 fprintf(logfile, "----------------\n");
3237 fprintf(logfile, "IN: %s\n", lookup_symbol(pc_start));
3238 target_disas(logfile, pc_start, dc->pc - pc_start, 0);
3239 fprintf(logfile, "\n");
3240 if (loglevel & (CPU_LOG_TB_OP)) {
3241 fprintf(logfile, "OP:\n");
3242 dump_ops(gen_opc_buf, gen_opparam_buf);
3243 fprintf(logfile, "\n");
3248 j = gen_opc_ptr - gen_opc_buf;
3251 gen_opc_instr_start[lj++] = 0;
3254 tb->size = dc->pc - pc_start;
3258 //expand_target_qops();
3262 int gen_intermediate_code(CPUState *env, TranslationBlock *tb)
3264 return gen_intermediate_code_internal(env, tb, 0);
3267 int gen_intermediate_code_pc(CPUState *env, TranslationBlock *tb)
3269 return gen_intermediate_code_internal(env, tb, 1);
3272 void cpu_reset(CPUM68KState *env)
3274 memset(env, 0, offsetof(CPUM68KState, breakpoints));
3275 #if !defined (CONFIG_USER_ONLY)
3278 m68k_switch_sp(env);
3279 /* ??? FP regs should be initialized to NaN. */
3280 env->cc_op = CC_OP_FLAGS;
3281 /* TODO: We should set PC from the interrupt vector. */
3286 CPUM68KState *cpu_m68k_init(void)
3290 env = malloc(sizeof(CPUM68KState));
3299 void cpu_m68k_close(CPUM68KState *env)
3304 void cpu_dump_state(CPUState *env, FILE *f,
3305 int (*cpu_fprintf)(FILE *f, const char *fmt, ...),
3311 for (i = 0; i < 8; i++)
3313 u.d = env->fregs[i];
3314 cpu_fprintf (f, "D%d = %08x A%d = %08x F%d = %08x%08x (%12g)\n",
3315 i, env->dregs[i], i, env->aregs[i],
3316 i, u.l.upper, u.l.lower, u.d);
3318 cpu_fprintf (f, "PC = %08x ", env->pc);
3320 cpu_fprintf (f, "SR = %04x %c%c%c%c%c ", sr, (sr & 0x10) ? 'X' : '-',
3321 (sr & CCF_N) ? 'N' : '-', (sr & CCF_Z) ? 'Z' : '-',
3322 (sr & CCF_V) ? 'V' : '-', (sr & CCF_C) ? 'C' : '-');
3323 cpu_fprintf (f, "FPRESULT = %12g\n", env->fp_result);