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| author | fishsoupisgood <github@madingley.org> | 2019-04-29 01:17:54 +0100 |
|---|---|---|
| committer | fishsoupisgood <github@madingley.org> | 2019-05-27 03:43:43 +0100 |
| commit | 3f2546b2ef55b661fd8dd69682b38992225e86f6 (patch) | |
| tree | 65ca85f13617aee1dce474596800950f266a456c /target-m68k/translate.c | |
| download | qemu-3f2546b2ef55b661fd8dd69682b38992225e86f6.tar.gz qemu-3f2546b2ef55b661fd8dd69682b38992225e86f6.tar.bz2 qemu-3f2546b2ef55b661fd8dd69682b38992225e86f6.zip | |
Diffstat (limited to 'target-m68k/translate.c')
| -rw-r--r-- | target-m68k/translate.c | 3126 |
1 files changed, 3126 insertions, 0 deletions
diff --git a/target-m68k/translate.c b/target-m68k/translate.c new file mode 100644 index 00000000..a57d2415 --- /dev/null +++ b/target-m68k/translate.c @@ -0,0 +1,3126 @@ +/* + * m68k translation + * + * Copyright (c) 2005-2007 CodeSourcery + * Written by Paul Brook + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, see <http://www.gnu.org/licenses/>. + */ + +#include "cpu.h" +#include "disas/disas.h" +#include "tcg-op.h" +#include "qemu/log.h" +#include "exec/cpu_ldst.h" + +#include "exec/helper-proto.h" +#include "exec/helper-gen.h" + +#include "trace-tcg.h" + + +//#define DEBUG_DISPATCH 1 + +/* Fake floating point. */ +#define tcg_gen_mov_f64 tcg_gen_mov_i64 +#define tcg_gen_qemu_ldf64 tcg_gen_qemu_ld64 +#define tcg_gen_qemu_stf64 tcg_gen_qemu_st64 + +#define DEFO32(name, offset) static TCGv QREG_##name; +#define DEFO64(name, offset) static TCGv_i64 QREG_##name; +#define DEFF64(name, offset) static TCGv_i64 QREG_##name; +#include "qregs.def" +#undef DEFO32 +#undef DEFO64 +#undef DEFF64 + +static TCGv_i32 cpu_halted; +static TCGv_i32 cpu_exception_index; + +static TCGv_ptr cpu_env; + +static char cpu_reg_names[3*8*3 + 5*4]; +static TCGv cpu_dregs[8]; +static TCGv cpu_aregs[8]; +static TCGv_i64 cpu_fregs[8]; +static TCGv_i64 cpu_macc[4]; + +#define DREG(insn, pos) cpu_dregs[((insn) >> (pos)) & 7] +#define AREG(insn, pos) cpu_aregs[((insn) >> (pos)) & 7] +#define FREG(insn, pos) cpu_fregs[((insn) >> (pos)) & 7] +#define MACREG(acc) cpu_macc[acc] +#define QREG_SP cpu_aregs[7] + +static TCGv NULL_QREG; +#define IS_NULL_QREG(t) (TCGV_EQUAL(t, NULL_QREG)) +/* Used to distinguish stores from bad addressing modes. */ +static TCGv store_dummy; + +#include "exec/gen-icount.h" + +void m68k_tcg_init(void) +{ + char *p; + int i; + +#define DEFO32(name, offset) QREG_##name = tcg_global_mem_new_i32(TCG_AREG0, offsetof(CPUM68KState, offset), #name); +#define DEFO64(name, offset) QREG_##name = tcg_global_mem_new_i64(TCG_AREG0, offsetof(CPUM68KState, offset), #name); +#define DEFF64(name, offset) DEFO64(name, offset) +#include "qregs.def" +#undef DEFO32 +#undef DEFO64 +#undef DEFF64 + + cpu_halted = tcg_global_mem_new_i32(TCG_AREG0, + -offsetof(M68kCPU, env) + + offsetof(CPUState, halted), "HALTED"); + cpu_exception_index = tcg_global_mem_new_i32(TCG_AREG0, + -offsetof(M68kCPU, env) + + offsetof(CPUState, exception_index), + "EXCEPTION"); + + cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env"); + + p = cpu_reg_names; + for (i = 0; i < 8; i++) { + sprintf(p, "D%d", i); + cpu_dregs[i] = tcg_global_mem_new(TCG_AREG0, + offsetof(CPUM68KState, dregs[i]), p); + p += 3; + sprintf(p, "A%d", i); + cpu_aregs[i] = tcg_global_mem_new(TCG_AREG0, + offsetof(CPUM68KState, aregs[i]), p); + p += 3; + sprintf(p, "F%d", i); + cpu_fregs[i] = tcg_global_mem_new_i64(TCG_AREG0, + offsetof(CPUM68KState, fregs[i]), p); + p += 3; + } + for (i = 0; i < 4; i++) { + sprintf(p, "ACC%d", i); + cpu_macc[i] = tcg_global_mem_new_i64(TCG_AREG0, + offsetof(CPUM68KState, macc[i]), p); + p += 5; + } + + NULL_QREG = tcg_global_mem_new(TCG_AREG0, -4, "NULL"); + store_dummy = tcg_global_mem_new(TCG_AREG0, -8, "NULL"); +} + +/* internal defines */ +typedef struct DisasContext { + CPUM68KState *env; + target_ulong insn_pc; /* Start of the current instruction. */ + target_ulong pc; + int is_jmp; + int cc_op; + int user; + uint32_t fpcr; + struct TranslationBlock *tb; + int singlestep_enabled; + TCGv_i64 mactmp; + int done_mac; +} DisasContext; + +#define DISAS_JUMP_NEXT 4 + +#if defined(CONFIG_USER_ONLY) +#define IS_USER(s) 1 +#else +#define IS_USER(s) s->user +#endif + +/* XXX: move that elsewhere */ +/* ??? Fix exceptions. */ +static void *gen_throws_exception; +#define gen_last_qop NULL + +#define OS_BYTE 0 +#define OS_WORD 1 +#define OS_LONG 2 +#define OS_SINGLE 4 +#define OS_DOUBLE 5 + +typedef void (*disas_proc)(CPUM68KState *env, DisasContext *s, uint16_t insn); + +#ifdef DEBUG_DISPATCH +#define DISAS_INSN(name) \ + static void real_disas_##name(CPUM68KState *env, DisasContext *s, \ + uint16_t insn); \ + static void disas_##name(CPUM68KState *env, DisasContext *s, \ + uint16_t insn) \ + { \ + qemu_log("Dispatch " #name "\n"); \ + real_disas_##name(s, env, insn); \ + } \ + static void real_disas_##name(CPUM68KState *env, DisasContext *s, \ + uint16_t insn) +#else +#define DISAS_INSN(name) \ + static void disas_##name(CPUM68KState *env, DisasContext *s, \ + uint16_t insn) +#endif + +/* Generate a load from the specified address. Narrow values are + sign extended to full register width. */ +static inline TCGv gen_load(DisasContext * s, int opsize, TCGv addr, int sign) +{ + TCGv tmp; + int index = IS_USER(s); + tmp = tcg_temp_new_i32(); + switch(opsize) { + case OS_BYTE: + if (sign) + tcg_gen_qemu_ld8s(tmp, addr, index); + else + tcg_gen_qemu_ld8u(tmp, addr, index); + break; + case OS_WORD: + if (sign) + tcg_gen_qemu_ld16s(tmp, addr, index); + else + tcg_gen_qemu_ld16u(tmp, addr, index); + break; + case OS_LONG: + case OS_SINGLE: + tcg_gen_qemu_ld32u(tmp, addr, index); + break; + default: + g_assert_not_reached(); + } + gen_throws_exception = gen_last_qop; + return tmp; +} + +static inline TCGv_i64 gen_load64(DisasContext * s, TCGv addr) +{ + TCGv_i64 tmp; + int index = IS_USER(s); + tmp = tcg_temp_new_i64(); + tcg_gen_qemu_ldf64(tmp, addr, index); + gen_throws_exception = gen_last_qop; + return tmp; +} + +/* Generate a store. */ +static inline void gen_store(DisasContext *s, int opsize, TCGv addr, TCGv val) +{ + int index = IS_USER(s); + switch(opsize) { + case OS_BYTE: + tcg_gen_qemu_st8(val, addr, index); + break; + case OS_WORD: + tcg_gen_qemu_st16(val, addr, index); + break; + case OS_LONG: + case OS_SINGLE: + tcg_gen_qemu_st32(val, addr, index); + break; + default: + g_assert_not_reached(); + } + gen_throws_exception = gen_last_qop; +} + +static inline void gen_store64(DisasContext *s, TCGv addr, TCGv_i64 val) +{ + int index = IS_USER(s); + tcg_gen_qemu_stf64(val, addr, index); + gen_throws_exception = gen_last_qop; +} + +typedef enum { + EA_STORE, + EA_LOADU, + EA_LOADS +} ea_what; + +/* Generate an unsigned load if VAL is 0 a signed load if val is -1, + otherwise generate a store. */ +static TCGv gen_ldst(DisasContext *s, int opsize, TCGv addr, TCGv val, + ea_what what) +{ + if (what == EA_STORE) { + gen_store(s, opsize, addr, val); + return store_dummy; + } else { + return gen_load(s, opsize, addr, what == EA_LOADS); + } +} + +/* Read a 32-bit immediate constant. */ +static inline uint32_t read_im32(CPUM68KState *env, DisasContext *s) +{ + uint32_t im; + im = ((uint32_t)cpu_lduw_code(env, s->pc)) << 16; + s->pc += 2; + im |= cpu_lduw_code(env, s->pc); + s->pc += 2; + return im; +} + +/* Calculate and address index. */ +static TCGv gen_addr_index(uint16_t ext, TCGv tmp) +{ + TCGv add; + int scale; + + add = (ext & 0x8000) ? AREG(ext, 12) : DREG(ext, 12); + if ((ext & 0x800) == 0) { + tcg_gen_ext16s_i32(tmp, add); + add = tmp; + } + scale = (ext >> 9) & 3; + if (scale != 0) { + tcg_gen_shli_i32(tmp, add, scale); + add = tmp; + } + return add; +} + +/* Handle a base + index + displacement effective addresss. + A NULL_QREG base means pc-relative. */ +static TCGv gen_lea_indexed(CPUM68KState *env, DisasContext *s, TCGv base) +{ + uint32_t offset; + uint16_t ext; + TCGv add; + TCGv tmp; + uint32_t bd, od; + + offset = s->pc; + ext = cpu_lduw_code(env, s->pc); + s->pc += 2; + + if ((ext & 0x800) == 0 && !m68k_feature(s->env, M68K_FEATURE_WORD_INDEX)) + return NULL_QREG; + + if (ext & 0x100) { + /* full extension word format */ + if (!m68k_feature(s->env, M68K_FEATURE_EXT_FULL)) + return NULL_QREG; + + if ((ext & 0x30) > 0x10) { + /* base displacement */ + if ((ext & 0x30) == 0x20) { + bd = (int16_t)cpu_lduw_code(env, s->pc); + s->pc += 2; + } else { + bd = read_im32(env, s); + } + } else { + bd = 0; + } + tmp = tcg_temp_new(); + if ((ext & 0x44) == 0) { + /* pre-index */ + add = gen_addr_index(ext, tmp); + } else { + add = NULL_QREG; + } + if ((ext & 0x80) == 0) { + /* base not suppressed */ + if (IS_NULL_QREG(base)) { + base = tcg_const_i32(offset + bd); + bd = 0; + } + if (!IS_NULL_QREG(add)) { + tcg_gen_add_i32(tmp, add, base); + add = tmp; + } else { + add = base; + } + } + if (!IS_NULL_QREG(add)) { + if (bd != 0) { + tcg_gen_addi_i32(tmp, add, bd); + add = tmp; + } + } else { + add = tcg_const_i32(bd); + } + if ((ext & 3) != 0) { + /* memory indirect */ + base = gen_load(s, OS_LONG, add, 0); + if ((ext & 0x44) == 4) { + add = gen_addr_index(ext, tmp); + tcg_gen_add_i32(tmp, add, base); + add = tmp; + } else { + add = base; + } + if ((ext & 3) > 1) { + /* outer displacement */ + if ((ext & 3) == 2) { + od = (int16_t)cpu_lduw_code(env, s->pc); + s->pc += 2; + } else { + od = read_im32(env, s); + } + } else { + od = 0; + } + if (od != 0) { + tcg_gen_addi_i32(tmp, add, od); + add = tmp; + } + } + } else { + /* brief extension word format */ + tmp = tcg_temp_new(); + add = gen_addr_index(ext, tmp); + if (!IS_NULL_QREG(base)) { + tcg_gen_add_i32(tmp, add, base); + if ((int8_t)ext) + tcg_gen_addi_i32(tmp, tmp, (int8_t)ext); + } else { + tcg_gen_addi_i32(tmp, add, offset + (int8_t)ext); + } + add = tmp; + } + return add; +} + +/* Update the CPU env CC_OP state. */ +static inline void gen_flush_cc_op(DisasContext *s) +{ + if (s->cc_op != CC_OP_DYNAMIC) + tcg_gen_movi_i32(QREG_CC_OP, s->cc_op); +} + +/* Evaluate all the CC flags. */ +static inline void gen_flush_flags(DisasContext *s) +{ + if (s->cc_op == CC_OP_FLAGS) + return; + gen_flush_cc_op(s); + gen_helper_flush_flags(cpu_env, QREG_CC_OP); + s->cc_op = CC_OP_FLAGS; +} + +static void gen_logic_cc(DisasContext *s, TCGv val) +{ + tcg_gen_mov_i32(QREG_CC_DEST, val); + s->cc_op = CC_OP_LOGIC; +} + +static void gen_update_cc_add(TCGv dest, TCGv src) +{ + tcg_gen_mov_i32(QREG_CC_DEST, dest); + tcg_gen_mov_i32(QREG_CC_SRC, src); +} + +static inline int opsize_bytes(int opsize) +{ + switch (opsize) { + case OS_BYTE: return 1; + case OS_WORD: return 2; + case OS_LONG: return 4; + case OS_SINGLE: return 4; + case OS_DOUBLE: return 8; + default: + g_assert_not_reached(); + } +} + +/* Assign value to a register. If the width is less than the register width + only the low part of the register is set. */ +static void gen_partset_reg(int opsize, TCGv reg, TCGv val) +{ + TCGv tmp; + switch (opsize) { + case OS_BYTE: + tcg_gen_andi_i32(reg, reg, 0xffffff00); + tmp = tcg_temp_new(); + tcg_gen_ext8u_i32(tmp, val); + tcg_gen_or_i32(reg, reg, tmp); + break; + case OS_WORD: + tcg_gen_andi_i32(reg, reg, 0xffff0000); + tmp = tcg_temp_new(); + tcg_gen_ext16u_i32(tmp, val); + tcg_gen_or_i32(reg, reg, tmp); + break; + case OS_LONG: + case OS_SINGLE: + tcg_gen_mov_i32(reg, val); + break; + default: + g_assert_not_reached(); + } +} + +/* Sign or zero extend a value. */ +static inline TCGv gen_extend(TCGv val, int opsize, int sign) +{ + TCGv tmp; + + switch (opsize) { + case OS_BYTE: + tmp = tcg_temp_new(); + if (sign) + tcg_gen_ext8s_i32(tmp, val); + else + tcg_gen_ext8u_i32(tmp, val); + break; + case OS_WORD: + tmp = tcg_temp_new(); + if (sign) + tcg_gen_ext16s_i32(tmp, val); + else + tcg_gen_ext16u_i32(tmp, val); + break; + case OS_LONG: + case OS_SINGLE: + tmp = val; + break; + default: + g_assert_not_reached(); + } + return tmp; +} + +/* Generate code for an "effective address". Does not adjust the base + register for autoincrement addressing modes. */ +static TCGv gen_lea(CPUM68KState *env, DisasContext *s, uint16_t insn, + int opsize) +{ + TCGv reg; + TCGv tmp; + uint16_t ext; + uint32_t offset; + + switch ((insn >> 3) & 7) { + case 0: /* Data register direct. */ + case 1: /* Address register direct. */ + return NULL_QREG; + case 2: /* Indirect register */ + case 3: /* Indirect postincrement. */ + return AREG(insn, 0); + case 4: /* Indirect predecrememnt. */ + reg = AREG(insn, 0); + tmp = tcg_temp_new(); + tcg_gen_subi_i32(tmp, reg, opsize_bytes(opsize)); + return tmp; + case 5: /* Indirect displacement. */ + reg = AREG(insn, 0); + tmp = tcg_temp_new(); + ext = cpu_lduw_code(env, s->pc); + s->pc += 2; + tcg_gen_addi_i32(tmp, reg, (int16_t)ext); + return tmp; + case 6: /* Indirect index + displacement. */ + reg = AREG(insn, 0); + return gen_lea_indexed(env, s, reg); + case 7: /* Other */ + switch (insn & 7) { + case 0: /* Absolute short. */ + offset = cpu_ldsw_code(env, s->pc); + s->pc += 2; + return tcg_const_i32(offset); + case 1: /* Absolute long. */ + offset = read_im32(env, s); + return tcg_const_i32(offset); + case 2: /* pc displacement */ + offset = s->pc; + offset += cpu_ldsw_code(env, s->pc); + s->pc += 2; + return tcg_const_i32(offset); + case 3: /* pc index+displacement. */ + return gen_lea_indexed(env, s, NULL_QREG); + case 4: /* Immediate. */ + default: + return NULL_QREG; + } + } + /* Should never happen. */ + return NULL_QREG; +} + +/* Helper function for gen_ea. Reuse the computed address between the + for read/write operands. */ +static inline TCGv gen_ea_once(CPUM68KState *env, DisasContext *s, + uint16_t insn, int opsize, TCGv val, + TCGv *addrp, ea_what what) +{ + TCGv tmp; + + if (addrp && what == EA_STORE) { + tmp = *addrp; + } else { + tmp = gen_lea(env, s, insn, opsize); + if (IS_NULL_QREG(tmp)) + return tmp; + if (addrp) + *addrp = tmp; + } + return gen_ldst(s, opsize, tmp, val, what); +} + +/* Generate code to load/store a value from/into an EA. If VAL > 0 this is + a write otherwise it is a read (0 == sign extend, -1 == zero extend). + ADDRP is non-null for readwrite operands. */ +static TCGv gen_ea(CPUM68KState *env, DisasContext *s, uint16_t insn, + int opsize, TCGv val, TCGv *addrp, ea_what what) +{ + TCGv reg; + TCGv result; + uint32_t offset; + + switch ((insn >> 3) & 7) { + case 0: /* Data register direct. */ + reg = DREG(insn, 0); + if (what == EA_STORE) { + gen_partset_reg(opsize, reg, val); + return store_dummy; + } else { + return gen_extend(reg, opsize, what == EA_LOADS); + } + case 1: /* Address register direct. */ + reg = AREG(insn, 0); + if (what == EA_STORE) { + tcg_gen_mov_i32(reg, val); + return store_dummy; + } else { + return gen_extend(reg, opsize, what == EA_LOADS); + } + case 2: /* Indirect register */ + reg = AREG(insn, 0); + return gen_ldst(s, opsize, reg, val, what); + case 3: /* Indirect postincrement. */ + reg = AREG(insn, 0); + result = gen_ldst(s, opsize, reg, val, what); + /* ??? This is not exception safe. The instruction may still + fault after this point. */ + if (what == EA_STORE || !addrp) + tcg_gen_addi_i32(reg, reg, opsize_bytes(opsize)); + return result; + case 4: /* Indirect predecrememnt. */ + { + TCGv tmp; + if (addrp && what == EA_STORE) { + tmp = *addrp; + } else { + tmp = gen_lea(env, s, insn, opsize); + if (IS_NULL_QREG(tmp)) + return tmp; + if (addrp) + *addrp = tmp; + } + result = gen_ldst(s, opsize, tmp, val, what); + /* ??? This is not exception safe. The instruction may still + fault after this point. */ + if (what == EA_STORE || !addrp) { + reg = AREG(insn, 0); + tcg_gen_mov_i32(reg, tmp); + } + } + return result; + case 5: /* Indirect displacement. */ + case 6: /* Indirect index + displacement. */ + return gen_ea_once(env, s, insn, opsize, val, addrp, what); + case 7: /* Other */ + switch (insn & 7) { + case 0: /* Absolute short. */ + case 1: /* Absolute long. */ + case 2: /* pc displacement */ + case 3: /* pc index+displacement. */ + return gen_ea_once(env, s, insn, opsize, val, addrp, what); + case 4: /* Immediate. */ + /* Sign extend values for consistency. */ + switch (opsize) { + case OS_BYTE: + if (what == EA_LOADS) { + offset = cpu_ldsb_code(env, s->pc + 1); + } else { + offset = cpu_ldub_code(env, s->pc + 1); + } + s->pc += 2; + break; + case OS_WORD: + if (what == EA_LOADS) { + offset = cpu_ldsw_code(env, s->pc); + } else { + offset = cpu_lduw_code(env, s->pc); + } + s->pc += 2; + break; + case OS_LONG: + offset = read_im32(env, s); + break; + default: + g_assert_not_reached(); + } + return tcg_const_i32(offset); + default: + return NULL_QREG; + } + } + /* Should never happen. */ + return NULL_QREG; +} + +/* This generates a conditional branch, clobbering all temporaries. */ +static void gen_jmpcc(DisasContext *s, int cond, TCGLabel *l1) +{ + TCGv tmp; + + /* TODO: Optimize compare/branch pairs rather than always flushing + flag state to CC_OP_FLAGS. */ + gen_flush_flags(s); + switch (cond) { + case 0: /* T */ + tcg_gen_br(l1); + break; + case 1: /* F */ + break; + case 2: /* HI (!C && !Z) */ + tmp = tcg_temp_new(); + tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_C | CCF_Z); + tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1); + break; + case 3: /* LS (C || Z) */ + tmp = tcg_temp_new(); + tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_C | CCF_Z); + tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1); + break; + case 4: /* CC (!C) */ + tmp = tcg_temp_new(); + tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_C); + tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1); + break; + case 5: /* CS (C) */ + tmp = tcg_temp_new(); + tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_C); + tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1); + break; + case 6: /* NE (!Z) */ + tmp = tcg_temp_new(); + tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_Z); + tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1); + break; + case 7: /* EQ (Z) */ + tmp = tcg_temp_new(); + tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_Z); + tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1); + break; + case 8: /* VC (!V) */ + tmp = tcg_temp_new(); + tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_V); + tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1); + break; + case 9: /* VS (V) */ + tmp = tcg_temp_new(); + tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_V); + tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1); + break; + case 10: /* PL (!N) */ + tmp = tcg_temp_new(); + tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_N); + tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1); + break; + case 11: /* MI (N) */ + tmp = tcg_temp_new(); + tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_N); + tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1); + break; + case 12: /* GE (!(N ^ V)) */ + tmp = tcg_temp_new(); + assert(CCF_V == (CCF_N >> 2)); + tcg_gen_shri_i32(tmp, QREG_CC_DEST, 2); + tcg_gen_xor_i32(tmp, tmp, QREG_CC_DEST); + tcg_gen_andi_i32(tmp, tmp, CCF_V); + tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1); + break; + case 13: /* LT (N ^ V) */ + tmp = tcg_temp_new(); + assert(CCF_V == (CCF_N >> 2)); + tcg_gen_shri_i32(tmp, QREG_CC_DEST, 2); + tcg_gen_xor_i32(tmp, tmp, QREG_CC_DEST); + tcg_gen_andi_i32(tmp, tmp, CCF_V); + tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1); + break; + case 14: /* GT (!(Z || (N ^ V))) */ + tmp = tcg_temp_new(); + assert(CCF_V == (CCF_N >> 2)); + tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_N); + tcg_gen_shri_i32(tmp, tmp, 2); + tcg_gen_xor_i32(tmp, tmp, QREG_CC_DEST); + tcg_gen_andi_i32(tmp, tmp, CCF_V | CCF_Z); + tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, l1); + break; + case 15: /* LE (Z || (N ^ V)) */ + tmp = tcg_temp_new(); + assert(CCF_V == (CCF_N >> 2)); + tcg_gen_andi_i32(tmp, QREG_CC_DEST, CCF_N); + tcg_gen_shri_i32(tmp, tmp, 2); + tcg_gen_xor_i32(tmp, tmp, QREG_CC_DEST); + tcg_gen_andi_i32(tmp, tmp, CCF_V | CCF_Z); + tcg_gen_brcondi_i32(TCG_COND_NE, tmp, 0, l1); + break; + default: + /* Should ever happen. */ + abort(); + } +} + +DISAS_INSN(scc) +{ + TCGLabel *l1; + int cond; + TCGv reg; + + l1 = gen_new_label(); + cond = (insn >> 8) & 0xf; + reg = DREG(insn, 0); + tcg_gen_andi_i32(reg, reg, 0xffffff00); + /* This is safe because we modify the reg directly, with no other values + live. */ + gen_jmpcc(s, cond ^ 1, l1); + tcg_gen_ori_i32(reg, reg, 0xff); + gen_set_label(l1); +} + +/* Force a TB lookup after an instruction that changes the CPU state. */ +static void gen_lookup_tb(DisasContext *s) +{ + gen_flush_cc_op(s); + tcg_gen_movi_i32(QREG_PC, s->pc); + s->is_jmp = DISAS_UPDATE; +} + +/* Generate a jump to an immediate address. */ +static void gen_jmp_im(DisasContext *s, uint32_t dest) +{ + gen_flush_cc_op(s); + tcg_gen_movi_i32(QREG_PC, dest); + s->is_jmp = DISAS_JUMP; +} + +/* Generate a jump to the address in qreg DEST. */ +static void gen_jmp(DisasContext *s, TCGv dest) +{ + gen_flush_cc_op(s); + tcg_gen_mov_i32(QREG_PC, dest); + s->is_jmp = DISAS_JUMP; +} + +static void gen_exception(DisasContext *s, uint32_t where, int nr) +{ + gen_flush_cc_op(s); + gen_jmp_im(s, where); + gen_helper_raise_exception(cpu_env, tcg_const_i32(nr)); +} + +static inline void gen_addr_fault(DisasContext *s) +{ + gen_exception(s, s->insn_pc, EXCP_ADDRESS); +} + +#define SRC_EA(env, result, opsize, op_sign, addrp) do { \ + result = gen_ea(env, s, insn, opsize, NULL_QREG, addrp, \ + op_sign ? EA_LOADS : EA_LOADU); \ + if (IS_NULL_QREG(result)) { \ + gen_addr_fault(s); \ + return; \ + } \ + } while (0) + +#define DEST_EA(env, insn, opsize, val, addrp) do { \ + TCGv ea_result = gen_ea(env, s, insn, opsize, val, addrp, EA_STORE); \ + if (IS_NULL_QREG(ea_result)) { \ + gen_addr_fault(s); \ + return; \ + } \ + } while (0) + +/* Generate a jump to an immediate address. */ +static void gen_jmp_tb(DisasContext *s, int n, uint32_t dest) +{ + TranslationBlock *tb; + + tb = s->tb; + if (unlikely(s->singlestep_enabled)) { + gen_exception(s, dest, EXCP_DEBUG); + } else if ((tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK) || + (s->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK)) { + tcg_gen_goto_tb(n); + tcg_gen_movi_i32(QREG_PC, dest); + tcg_gen_exit_tb((uintptr_t)tb + n); + } else { + gen_jmp_im(s, dest); + tcg_gen_exit_tb(0); + } + s->is_jmp = DISAS_TB_JUMP; +} + +DISAS_INSN(undef_mac) +{ + gen_exception(s, s->pc - 2, EXCP_LINEA); +} + +DISAS_INSN(undef_fpu) +{ + gen_exception(s, s->pc - 2, EXCP_LINEF); +} + +DISAS_INSN(undef) +{ + M68kCPU *cpu = m68k_env_get_cpu(env); + + gen_exception(s, s->pc - 2, EXCP_UNSUPPORTED); + cpu_abort(CPU(cpu), "Illegal instruction: %04x @ %08x", insn, s->pc - 2); +} + +DISAS_INSN(mulw) +{ + TCGv reg; + TCGv tmp; + TCGv src; + int sign; + + sign = (insn & 0x100) != 0; + reg = DREG(insn, 9); + tmp = tcg_temp_new(); + if (sign) + tcg_gen_ext16s_i32(tmp, reg); + else + tcg_gen_ext16u_i32(tmp, reg); + SRC_EA(env, src, OS_WORD, sign, NULL); + tcg_gen_mul_i32(tmp, tmp, src); + tcg_gen_mov_i32(reg, tmp); + /* Unlike m68k, coldfire always clears the overflow bit. */ + gen_logic_cc(s, tmp); +} + +DISAS_INSN(divw) +{ + TCGv reg; + TCGv tmp; + TCGv src; + int sign; + + sign = (insn & 0x100) != 0; + reg = DREG(insn, 9); + if (sign) { + tcg_gen_ext16s_i32(QREG_DIV1, reg); + } else { + tcg_gen_ext16u_i32(QREG_DIV1, reg); + } + SRC_EA(env, src, OS_WORD, sign, NULL); + tcg_gen_mov_i32(QREG_DIV2, src); + if (sign) { + gen_helper_divs(cpu_env, tcg_const_i32(1)); + } else { + gen_helper_divu(cpu_env, tcg_const_i32(1)); + } + + tmp = tcg_temp_new(); + src = tcg_temp_new(); + tcg_gen_ext16u_i32(tmp, QREG_DIV1); + tcg_gen_shli_i32(src, QREG_DIV2, 16); + tcg_gen_or_i32(reg, tmp, src); + s->cc_op = CC_OP_FLAGS; +} + +DISAS_INSN(divl) +{ + TCGv num; + TCGv den; + TCGv reg; + uint16_t ext; + + ext = cpu_lduw_code(env, s->pc); + s->pc += 2; + if (ext & 0x87f8) { + gen_exception(s, s->pc - 4, EXCP_UNSUPPORTED); + return; + } + num = DREG(ext, 12); + reg = DREG(ext, 0); + tcg_gen_mov_i32(QREG_DIV1, num); + SRC_EA(env, den, OS_LONG, 0, NULL); + tcg_gen_mov_i32(QREG_DIV2, den); + if (ext & 0x0800) { + gen_helper_divs(cpu_env, tcg_const_i32(0)); + } else { + gen_helper_divu(cpu_env, tcg_const_i32(0)); + } + if ((ext & 7) == ((ext >> 12) & 7)) { + /* div */ + tcg_gen_mov_i32 (reg, QREG_DIV1); + } else { + /* rem */ + tcg_gen_mov_i32 (reg, QREG_DIV2); + } + s->cc_op = CC_OP_FLAGS; +} + +DISAS_INSN(addsub) +{ + TCGv reg; + TCGv dest; + TCGv src; + TCGv tmp; + TCGv addr; + int add; + + add = (insn & 0x4000) != 0; + reg = DREG(insn, 9); + dest = tcg_temp_new(); + if (insn & 0x100) { + SRC_EA(env, tmp, OS_LONG, 0, &addr); + src = reg; + } else { + tmp = reg; + SRC_EA(env, src, OS_LONG, 0, NULL); + } + if (add) { + tcg_gen_add_i32(dest, tmp, src); + gen_helper_xflag_lt(QREG_CC_X, dest, src); + s->cc_op = CC_OP_ADD; + } else { + gen_helper_xflag_lt(QREG_CC_X, tmp, src); + tcg_gen_sub_i32(dest, tmp, src); + s->cc_op = CC_OP_SUB; + } + gen_update_cc_add(dest, src); + if (insn & 0x100) { + DEST_EA(env, insn, OS_LONG, dest, &addr); + } else { + tcg_gen_mov_i32(reg, dest); + } +} + + +/* Reverse the order of the bits in REG. */ +DISAS_INSN(bitrev) +{ + TCGv reg; + reg = DREG(insn, 0); + gen_helper_bitrev(reg, reg); +} + +DISAS_INSN(bitop_reg) +{ + int opsize; + int op; + TCGv src1; + TCGv src2; + TCGv tmp; + TCGv addr; + TCGv dest; + + if ((insn & 0x38) != 0) + opsize = OS_BYTE; + else + opsize = OS_LONG; + op = (insn >> 6) & 3; + SRC_EA(env, src1, opsize, 0, op ? &addr: NULL); + src2 = DREG(insn, 9); + dest = tcg_temp_new(); + + gen_flush_flags(s); + tmp = tcg_temp_new(); + if (opsize == OS_BYTE) + tcg_gen_andi_i32(tmp, src2, 7); + else + tcg_gen_andi_i32(tmp, src2, 31); + src2 = tmp; + tmp = tcg_temp_new(); + tcg_gen_shr_i32(tmp, src1, src2); + tcg_gen_andi_i32(tmp, tmp, 1); + tcg_gen_shli_i32(tmp, tmp, 2); + /* Clear CCF_Z if bit set. */ + tcg_gen_ori_i32(QREG_CC_DEST, QREG_CC_DEST, CCF_Z); + tcg_gen_xor_i32(QREG_CC_DEST, QREG_CC_DEST, tmp); + + tcg_gen_shl_i32(tmp, tcg_const_i32(1), src2); + switch (op) { + case 1: /* bchg */ + tcg_gen_xor_i32(dest, src1, tmp); + break; + case 2: /* bclr */ + tcg_gen_not_i32(tmp, tmp); + tcg_gen_and_i32(dest, src1, tmp); + break; + case 3: /* bset */ + tcg_gen_or_i32(dest, src1, tmp); + break; + default: /* btst */ + break; + } + if (op) + DEST_EA(env, insn, opsize, dest, &addr); +} + +DISAS_INSN(sats) +{ + TCGv reg; + reg = DREG(insn, 0); + gen_flush_flags(s); + gen_helper_sats(reg, reg, QREG_CC_DEST); + gen_logic_cc(s, reg); +} + +static void gen_push(DisasContext *s, TCGv val) +{ + TCGv tmp; + + tmp = tcg_temp_new(); + tcg_gen_subi_i32(tmp, QREG_SP, 4); + gen_store(s, OS_LONG, tmp, val); + tcg_gen_mov_i32(QREG_SP, tmp); +} + +DISAS_INSN(movem) +{ + TCGv addr; + int i; + uint16_t mask; + TCGv reg; + TCGv tmp; + int is_load; + + mask = cpu_lduw_code(env, s->pc); + s->pc += 2; + tmp = gen_lea(env, s, insn, OS_LONG); + if (IS_NULL_QREG(tmp)) { + gen_addr_fault(s); + return; + } + addr = tcg_temp_new(); + tcg_gen_mov_i32(addr, tmp); + is_load = ((insn & 0x0400) != 0); + for (i = 0; i < 16; i++, mask >>= 1) { + if (mask & 1) { + if (i < 8) + reg = DREG(i, 0); + else + reg = AREG(i, 0); + if (is_load) { + tmp = gen_load(s, OS_LONG, addr, 0); + tcg_gen_mov_i32(reg, tmp); + } else { + gen_store(s, OS_LONG, addr, reg); + } + if (mask != 1) + tcg_gen_addi_i32(addr, addr, 4); + } + } +} + +DISAS_INSN(bitop_im) +{ + int opsize; + int op; + TCGv src1; + uint32_t mask; + int bitnum; + TCGv tmp; + TCGv addr; + + if ((insn & 0x38) != 0) + opsize = OS_BYTE; + else + opsize = OS_LONG; + op = (insn >> 6) & 3; + + bitnum = cpu_lduw_code(env, s->pc); + s->pc += 2; + if (bitnum & 0xff00) { + disas_undef(env, s, insn); + return; + } + + SRC_EA(env, src1, opsize, 0, op ? &addr: NULL); + + gen_flush_flags(s); + if (opsize == OS_BYTE) + bitnum &= 7; + else + bitnum &= 31; + mask = 1 << bitnum; + + tmp = tcg_temp_new(); + assert (CCF_Z == (1 << 2)); + if (bitnum > 2) + tcg_gen_shri_i32(tmp, src1, bitnum - 2); + else if (bitnum < 2) + tcg_gen_shli_i32(tmp, src1, 2 - bitnum); + else + tcg_gen_mov_i32(tmp, src1); + tcg_gen_andi_i32(tmp, tmp, CCF_Z); + /* Clear CCF_Z if bit set. */ + tcg_gen_ori_i32(QREG_CC_DEST, QREG_CC_DEST, CCF_Z); + tcg_gen_xor_i32(QREG_CC_DEST, QREG_CC_DEST, tmp); + if (op) { + switch (op) { + case 1: /* bchg */ + tcg_gen_xori_i32(tmp, src1, mask); + break; + case 2: /* bclr */ + tcg_gen_andi_i32(tmp, src1, ~mask); + break; + case 3: /* bset */ + tcg_gen_ori_i32(tmp, src1, mask); + break; + default: /* btst */ + break; + } + DEST_EA(env, insn, opsize, tmp, &addr); + } +} + +DISAS_INSN(arith_im) +{ + int op; + uint32_t im; + TCGv src1; + TCGv dest; + TCGv addr; + + op = (insn >> 9) & 7; + SRC_EA(env, src1, OS_LONG, 0, (op == 6) ? NULL : &addr); + im = read_im32(env, s); + dest = tcg_temp_new(); + switch (op) { + case 0: /* ori */ + tcg_gen_ori_i32(dest, src1, im); + gen_logic_cc(s, dest); + break; + case 1: /* andi */ + tcg_gen_andi_i32(dest, src1, im); + gen_logic_cc(s, dest); + break; + case 2: /* subi */ + tcg_gen_mov_i32(dest, src1); + gen_helper_xflag_lt(QREG_CC_X, dest, tcg_const_i32(im)); + tcg_gen_subi_i32(dest, dest, im); + gen_update_cc_add(dest, tcg_const_i32(im)); + s->cc_op = CC_OP_SUB; + break; + case 3: /* addi */ + tcg_gen_mov_i32(dest, src1); + tcg_gen_addi_i32(dest, dest, im); + gen_update_cc_add(dest, tcg_const_i32(im)); + gen_helper_xflag_lt(QREG_CC_X, dest, tcg_const_i32(im)); + s->cc_op = CC_OP_ADD; + break; + case 5: /* eori */ + tcg_gen_xori_i32(dest, src1, im); + gen_logic_cc(s, dest); + break; + case 6: /* cmpi */ + tcg_gen_mov_i32(dest, src1); + tcg_gen_subi_i32(dest, dest, im); + gen_update_cc_add(dest, tcg_const_i32(im)); + s->cc_op = CC_OP_SUB; + break; + default: + abort(); + } + if (op != 6) { + DEST_EA(env, insn, OS_LONG, dest, &addr); + } +} + +DISAS_INSN(byterev) +{ + TCGv reg; + + reg = DREG(insn, 0); + tcg_gen_bswap32_i32(reg, reg); +} + +DISAS_INSN(move) +{ + TCGv src; + TCGv dest; + int op; + int opsize; + + switch (insn >> 12) { + case 1: /* move.b */ + opsize = OS_BYTE; + break; + case 2: /* move.l */ + opsize = OS_LONG; + break; + case 3: /* move.w */ + opsize = OS_WORD; + break; + default: + abort(); + } + SRC_EA(env, src, opsize, 1, NULL); + op = (insn >> 6) & 7; + if (op == 1) { + /* movea */ + /* The value will already have been sign extended. */ + dest = AREG(insn, 9); + tcg_gen_mov_i32(dest, src); + } else { + /* normal move */ + uint16_t dest_ea; + dest_ea = ((insn >> 9) & 7) | (op << 3); + DEST_EA(env, dest_ea, opsize, src, NULL); + /* This will be correct because loads sign extend. */ + gen_logic_cc(s, src); + } +} + +DISAS_INSN(negx) +{ + TCGv reg; + + gen_flush_flags(s); + reg = DREG(insn, 0); + gen_helper_subx_cc(reg, cpu_env, tcg_const_i32(0), reg); +} + +DISAS_INSN(lea) +{ + TCGv reg; + TCGv tmp; + + reg = AREG(insn, 9); + tmp = gen_lea(env, s, insn, OS_LONG); + if (IS_NULL_QREG(tmp)) { + gen_addr_fault(s); + return; + } + tcg_gen_mov_i32(reg, tmp); +} + +DISAS_INSN(clr) +{ + int opsize; + + switch ((insn >> 6) & 3) { + case 0: /* clr.b */ + opsize = OS_BYTE; + break; + case 1: /* clr.w */ + opsize = OS_WORD; + break; + case 2: /* clr.l */ + opsize = OS_LONG; + break; + default: + abort(); + } + DEST_EA(env, insn, opsize, tcg_const_i32(0), NULL); + gen_logic_cc(s, tcg_const_i32(0)); +} + +static TCGv gen_get_ccr(DisasContext *s) +{ + TCGv dest; + + gen_flush_flags(s); + dest = tcg_temp_new(); + tcg_gen_shli_i32(dest, QREG_CC_X, 4); + tcg_gen_or_i32(dest, dest, QREG_CC_DEST); + return dest; +} + +DISAS_INSN(move_from_ccr) +{ + TCGv reg; + TCGv ccr; + + ccr = gen_get_ccr(s); + reg = DREG(insn, 0); + gen_partset_reg(OS_WORD, reg, ccr); +} + +DISAS_INSN(neg) +{ + TCGv reg; + TCGv src1; + + reg = DREG(insn, 0); + src1 = tcg_temp_new(); + tcg_gen_mov_i32(src1, reg); + tcg_gen_neg_i32(reg, src1); + s->cc_op = CC_OP_SUB; + gen_update_cc_add(reg, src1); + gen_helper_xflag_lt(QREG_CC_X, tcg_const_i32(0), src1); + s->cc_op = CC_OP_SUB; +} + +static void gen_set_sr_im(DisasContext *s, uint16_t val, int ccr_only) +{ + tcg_gen_movi_i32(QREG_CC_DEST, val & 0xf); + tcg_gen_movi_i32(QREG_CC_X, (val & 0x10) >> 4); + if (!ccr_only) { + gen_helper_set_sr(cpu_env, tcg_const_i32(val & 0xff00)); + } +} + +static void gen_set_sr(CPUM68KState *env, DisasContext *s, uint16_t insn, + int ccr_only) +{ + TCGv tmp; + TCGv reg; + + s->cc_op = CC_OP_FLAGS; + if ((insn & 0x38) == 0) + { + tmp = tcg_temp_new(); + reg = DREG(insn, 0); + tcg_gen_andi_i32(QREG_CC_DEST, reg, 0xf); + tcg_gen_shri_i32(tmp, reg, 4); + tcg_gen_andi_i32(QREG_CC_X, tmp, 1); + if (!ccr_only) { + gen_helper_set_sr(cpu_env, reg); + } + } + else if ((insn & 0x3f) == 0x3c) + { + uint16_t val; + val = cpu_lduw_code(env, s->pc); + s->pc += 2; + gen_set_sr_im(s, val, ccr_only); + } + else + disas_undef(env, s, insn); +} + +DISAS_INSN(move_to_ccr) +{ + gen_set_sr(env, s, insn, 1); +} + +DISAS_INSN(not) +{ + TCGv reg; + + reg = DREG(insn, 0); + tcg_gen_not_i32(reg, reg); + gen_logic_cc(s, reg); +} + +DISAS_INSN(swap) +{ + TCGv src1; + TCGv src2; + TCGv reg; + + src1 = tcg_temp_new(); + src2 = tcg_temp_new(); + reg = DREG(insn, 0); + tcg_gen_shli_i32(src1, reg, 16); + tcg_gen_shri_i32(src2, reg, 16); + tcg_gen_or_i32(reg, src1, src2); + gen_logic_cc(s, reg); +} + +DISAS_INSN(pea) +{ + TCGv tmp; + + tmp = gen_lea(env, s, insn, OS_LONG); + if (IS_NULL_QREG(tmp)) { + gen_addr_fault(s); + return; + } + gen_push(s, tmp); +} + +DISAS_INSN(ext) +{ + int op; + TCGv reg; + TCGv tmp; + + reg = DREG(insn, 0); + op = (insn >> 6) & 7; + tmp = tcg_temp_new(); + if (op == 3) + tcg_gen_ext16s_i32(tmp, reg); + else + tcg_gen_ext8s_i32(tmp, reg); + if (op == 2) + gen_partset_reg(OS_WORD, reg, tmp); + else + tcg_gen_mov_i32(reg, tmp); + gen_logic_cc(s, tmp); +} + +DISAS_INSN(tst) +{ + int opsize; + TCGv tmp; + + switch ((insn >> 6) & 3) { + case 0: /* tst.b */ + opsize = OS_BYTE; + break; + case 1: /* tst.w */ + opsize = OS_WORD; + break; + case 2: /* tst.l */ + opsize = OS_LONG; + break; + default: + abort(); + } + SRC_EA(env, tmp, opsize, 1, NULL); + gen_logic_cc(s, tmp); +} + +DISAS_INSN(pulse) +{ + /* Implemented as a NOP. */ +} + +DISAS_INSN(illegal) +{ + gen_exception(s, s->pc - 2, EXCP_ILLEGAL); +} + +/* ??? This should be atomic. */ +DISAS_INSN(tas) +{ + TCGv dest; + TCGv src1; + TCGv addr; + + dest = tcg_temp_new(); + SRC_EA(env, src1, OS_BYTE, 1, &addr); + gen_logic_cc(s, src1); + tcg_gen_ori_i32(dest, src1, 0x80); + DEST_EA(env, insn, OS_BYTE, dest, &addr); +} + +DISAS_INSN(mull) +{ + uint16_t ext; + TCGv reg; + TCGv src1; + TCGv dest; + + /* The upper 32 bits of the product are discarded, so + muls.l and mulu.l are functionally equivalent. */ + ext = cpu_lduw_code(env, s->pc); + s->pc += 2; + if (ext & 0x87ff) { + gen_exception(s, s->pc - 4, EXCP_UNSUPPORTED); + return; + } + reg = DREG(ext, 12); + SRC_EA(env, src1, OS_LONG, 0, NULL); + dest = tcg_temp_new(); + tcg_gen_mul_i32(dest, src1, reg); + tcg_gen_mov_i32(reg, dest); + /* Unlike m68k, coldfire always clears the overflow bit. */ + gen_logic_cc(s, dest); +} + +DISAS_INSN(link) +{ + int16_t offset; + TCGv reg; + TCGv tmp; + + offset = cpu_ldsw_code(env, s->pc); + s->pc += 2; + reg = AREG(insn, 0); + tmp = tcg_temp_new(); + tcg_gen_subi_i32(tmp, QREG_SP, 4); + gen_store(s, OS_LONG, tmp, reg); + if ((insn & 7) != 7) + tcg_gen_mov_i32(reg, tmp); + tcg_gen_addi_i32(QREG_SP, tmp, offset); +} + +DISAS_INSN(unlk) +{ + TCGv src; + TCGv reg; + TCGv tmp; + + src = tcg_temp_new(); + reg = AREG(insn, 0); + tcg_gen_mov_i32(src, reg); + tmp = gen_load(s, OS_LONG, src, 0); + tcg_gen_mov_i32(reg, tmp); + tcg_gen_addi_i32(QREG_SP, src, 4); +} + +DISAS_INSN(nop) +{ +} + +DISAS_INSN(rts) +{ + TCGv tmp; + + tmp = gen_load(s, OS_LONG, QREG_SP, 0); + tcg_gen_addi_i32(QREG_SP, QREG_SP, 4); + gen_jmp(s, tmp); +} + +DISAS_INSN(jump) +{ + TCGv tmp; + + /* Load the target address first to ensure correct exception + behavior. */ + tmp = gen_lea(env, s, insn, OS_LONG); + if (IS_NULL_QREG(tmp)) { + gen_addr_fault(s); + return; + } + if ((insn & 0x40) == 0) { + /* jsr */ + gen_push(s, tcg_const_i32(s->pc)); + } + gen_jmp(s, tmp); +} + +DISAS_INSN(addsubq) +{ + TCGv src1; + TCGv src2; + TCGv dest; + int val; + TCGv addr; + + SRC_EA(env, src1, OS_LONG, 0, &addr); + val = (insn >> 9) & 7; + if (val == 0) + val = 8; + dest = tcg_temp_new(); + tcg_gen_mov_i32(dest, src1); + if ((insn & 0x38) == 0x08) { + /* Don't update condition codes if the destination is an + address register. */ + if (insn & 0x0100) { + tcg_gen_subi_i32(dest, dest, val); + } else { + tcg_gen_addi_i32(dest, dest, val); + } + } else { + src2 = tcg_const_i32(val); + if (insn & 0x0100) { + gen_helper_xflag_lt(QREG_CC_X, dest, src2); + tcg_gen_subi_i32(dest, dest, val); + s->cc_op = CC_OP_SUB; + } else { + tcg_gen_addi_i32(dest, dest, val); + gen_helper_xflag_lt(QREG_CC_X, dest, src2); + s->cc_op = CC_OP_ADD; + } + gen_update_cc_add(dest, src2); + } + DEST_EA(env, insn, OS_LONG, dest, &addr); +} + +DISAS_INSN(tpf) +{ + switch (insn & 7) { + case 2: /* One extension word. */ + s->pc += 2; + break; + case 3: /* Two extension words. */ + s->pc += 4; + break; + case 4: /* No extension words. */ + break; + default: + disas_undef(env, s, insn); + } +} + +DISAS_INSN(branch) +{ + int32_t offset; + uint32_t base; + int op; + TCGLabel *l1; + + base = s->pc; + op = (insn >> 8) & 0xf; + offset = (int8_t)insn; + if (offset == 0) { + offset = cpu_ldsw_code(env, s->pc); + s->pc += 2; + } else if (offset == -1) { + offset = read_im32(env, s); + } + if (op == 1) { + /* bsr */ + gen_push(s, tcg_const_i32(s->pc)); + } + gen_flush_cc_op(s); + if (op > 1) { + /* Bcc */ + l1 = gen_new_label(); + gen_jmpcc(s, ((insn >> 8) & 0xf) ^ 1, l1); + gen_jmp_tb(s, 1, base + offset); + gen_set_label(l1); + gen_jmp_tb(s, 0, s->pc); + } else { + /* Unconditional branch. */ + gen_jmp_tb(s, 0, base + offset); + } +} + +DISAS_INSN(moveq) +{ + uint32_t val; + + val = (int8_t)insn; + tcg_gen_movi_i32(DREG(insn, 9), val); + gen_logic_cc(s, tcg_const_i32(val)); +} + +DISAS_INSN(mvzs) +{ + int opsize; + TCGv src; + TCGv reg; + + if (insn & 0x40) + opsize = OS_WORD; + else + opsize = OS_BYTE; + SRC_EA(env, src, opsize, (insn & 0x80) == 0, NULL); + reg = DREG(insn, 9); + tcg_gen_mov_i32(reg, src); + gen_logic_cc(s, src); +} + +DISAS_INSN(or) +{ + TCGv reg; + TCGv dest; + TCGv src; + TCGv addr; + + reg = DREG(insn, 9); + dest = tcg_temp_new(); + if (insn & 0x100) { + SRC_EA(env, src, OS_LONG, 0, &addr); + tcg_gen_or_i32(dest, src, reg); + DEST_EA(env, insn, OS_LONG, dest, &addr); + } else { + SRC_EA(env, src, OS_LONG, 0, NULL); + tcg_gen_or_i32(dest, src, reg); + tcg_gen_mov_i32(reg, dest); + } + gen_logic_cc(s, dest); +} + +DISAS_INSN(suba) +{ + TCGv src; + TCGv reg; + + SRC_EA(env, src, OS_LONG, 0, NULL); + reg = AREG(insn, 9); + tcg_gen_sub_i32(reg, reg, src); +} + +DISAS_INSN(subx) +{ + TCGv reg; + TCGv src; + + gen_flush_flags(s); + reg = DREG(insn, 9); + src = DREG(insn, 0); + gen_helper_subx_cc(reg, cpu_env, reg, src); +} + +DISAS_INSN(mov3q) +{ + TCGv src; + int val; + + val = (insn >> 9) & 7; + if (val == 0) + val = -1; + src = tcg_const_i32(val); + gen_logic_cc(s, src); + DEST_EA(env, insn, OS_LONG, src, NULL); +} + +DISAS_INSN(cmp) +{ + int op; + TCGv src; + TCGv reg; + TCGv dest; + int opsize; + + op = (insn >> 6) & 3; + switch (op) { + case 0: /* cmp.b */ + opsize = OS_BYTE; + s->cc_op = CC_OP_CMPB; + break; + case 1: /* cmp.w */ + opsize = OS_WORD; + s->cc_op = CC_OP_CMPW; + break; + case 2: /* cmp.l */ + opsize = OS_LONG; + s->cc_op = CC_OP_SUB; + break; + default: + abort(); + } + SRC_EA(env, src, opsize, 1, NULL); + reg = DREG(insn, 9); + dest = tcg_temp_new(); + tcg_gen_sub_i32(dest, reg, src); + gen_update_cc_add(dest, src); +} + +DISAS_INSN(cmpa) +{ + int opsize; + TCGv src; + TCGv reg; + TCGv dest; + + if (insn & 0x100) { + opsize = OS_LONG; + } else { + opsize = OS_WORD; + } + SRC_EA(env, src, opsize, 1, NULL); + reg = AREG(insn, 9); + dest = tcg_temp_new(); + tcg_gen_sub_i32(dest, reg, src); + gen_update_cc_add(dest, src); + s->cc_op = CC_OP_SUB; +} + +DISAS_INSN(eor) +{ + TCGv src; + TCGv reg; + TCGv dest; + TCGv addr; + + SRC_EA(env, src, OS_LONG, 0, &addr); + reg = DREG(insn, 9); + dest = tcg_temp_new(); + tcg_gen_xor_i32(dest, src, reg); + gen_logic_cc(s, dest); + DEST_EA(env, insn, OS_LONG, dest, &addr); +} + +DISAS_INSN(and) +{ + TCGv src; + TCGv reg; + TCGv dest; + TCGv addr; + + reg = DREG(insn, 9); + dest = tcg_temp_new(); + if (insn & 0x100) { + SRC_EA(env, src, OS_LONG, 0, &addr); + tcg_gen_and_i32(dest, src, reg); + DEST_EA(env, insn, OS_LONG, dest, &addr); + } else { + SRC_EA(env, src, OS_LONG, 0, NULL); + tcg_gen_and_i32(dest, src, reg); + tcg_gen_mov_i32(reg, dest); + } + gen_logic_cc(s, dest); +} + +DISAS_INSN(adda) +{ + TCGv src; + TCGv reg; + + SRC_EA(env, src, OS_LONG, 0, NULL); + reg = AREG(insn, 9); + tcg_gen_add_i32(reg, reg, src); +} + +DISAS_INSN(addx) +{ + TCGv reg; + TCGv src; + + gen_flush_flags(s); + reg = DREG(insn, 9); + src = DREG(insn, 0); + gen_helper_addx_cc(reg, cpu_env, reg, src); + s->cc_op = CC_OP_FLAGS; +} + +/* TODO: This could be implemented without helper functions. */ +DISAS_INSN(shift_im) +{ + TCGv reg; + int tmp; + TCGv shift; + + reg = DREG(insn, 0); + tmp = (insn >> 9) & 7; + if (tmp == 0) + tmp = 8; + shift = tcg_const_i32(tmp); + /* No need to flush flags becuse we know we will set C flag. */ + if (insn & 0x100) { + gen_helper_shl_cc(reg, cpu_env, reg, shift); + } else { + if (insn & 8) { + gen_helper_shr_cc(reg, cpu_env, reg, shift); + } else { + gen_helper_sar_cc(reg, cpu_env, reg, shift); + } + } + s->cc_op = CC_OP_SHIFT; +} + +DISAS_INSN(shift_reg) +{ + TCGv reg; + TCGv shift; + + reg = DREG(insn, 0); + shift = DREG(insn, 9); + /* Shift by zero leaves C flag unmodified. */ + gen_flush_flags(s); + if (insn & 0x100) { + gen_helper_shl_cc(reg, cpu_env, reg, shift); + } else { + if (insn & 8) { + gen_helper_shr_cc(reg, cpu_env, reg, shift); + } else { + gen_helper_sar_cc(reg, cpu_env, reg, shift); + } + } + s->cc_op = CC_OP_SHIFT; +} + +DISAS_INSN(ff1) +{ + TCGv reg; + reg = DREG(insn, 0); + gen_logic_cc(s, reg); + gen_helper_ff1(reg, reg); +} + +static TCGv gen_get_sr(DisasContext *s) +{ + TCGv ccr; + TCGv sr; + + ccr = gen_get_ccr(s); + sr = tcg_temp_new(); + tcg_gen_andi_i32(sr, QREG_SR, 0xffe0); + tcg_gen_or_i32(sr, sr, ccr); + return sr; +} + +DISAS_INSN(strldsr) +{ + uint16_t ext; + uint32_t addr; + + addr = s->pc - 2; + ext = cpu_lduw_code(env, s->pc); + s->pc += 2; + if (ext != 0x46FC) { + gen_exception(s, addr, EXCP_UNSUPPORTED); + return; + } + ext = cpu_lduw_code(env, s->pc); + s->pc += 2; + if (IS_USER(s) || (ext & SR_S) == 0) { + gen_exception(s, addr, EXCP_PRIVILEGE); + return; + } + gen_push(s, gen_get_sr(s)); + gen_set_sr_im(s, ext, 0); +} + +DISAS_INSN(move_from_sr) +{ + TCGv reg; + TCGv sr; + + if (IS_USER(s)) { + gen_exception(s, s->pc - 2, EXCP_PRIVILEGE); + return; + } + sr = gen_get_sr(s); + reg = DREG(insn, 0); + gen_partset_reg(OS_WORD, reg, sr); +} + +DISAS_INSN(move_to_sr) +{ + if (IS_USER(s)) { + gen_exception(s, s->pc - 2, EXCP_PRIVILEGE); + return; + } + gen_set_sr(env, s, insn, 0); + gen_lookup_tb(s); +} + +DISAS_INSN(move_from_usp) +{ + if (IS_USER(s)) { + gen_exception(s, s->pc - 2, EXCP_PRIVILEGE); + return; + } + tcg_gen_ld_i32(AREG(insn, 0), cpu_env, + offsetof(CPUM68KState, sp[M68K_USP])); +} + +DISAS_INSN(move_to_usp) +{ + if (IS_USER(s)) { + gen_exception(s, s->pc - 2, EXCP_PRIVILEGE); + return; + } + tcg_gen_st_i32(AREG(insn, 0), cpu_env, + offsetof(CPUM68KState, sp[M68K_USP])); +} + +DISAS_INSN(halt) +{ + gen_exception(s, s->pc, EXCP_HALT_INSN); +} + +DISAS_INSN(stop) +{ + uint16_t ext; + + if (IS_USER(s)) { + gen_exception(s, s->pc - 2, EXCP_PRIVILEGE); + return; + } + + ext = cpu_lduw_code(env, s->pc); + s->pc += 2; + + gen_set_sr_im(s, ext, 0); + tcg_gen_movi_i32(cpu_halted, 1); + gen_exception(s, s->pc, EXCP_HLT); +} + +DISAS_INSN(rte) +{ + if (IS_USER(s)) { + gen_exception(s, s->pc - 2, EXCP_PRIVILEGE); + return; + } + gen_exception(s, s->pc - 2, EXCP_RTE); +} + +DISAS_INSN(movec) +{ + uint16_t ext; + TCGv reg; + + if (IS_USER(s)) { + gen_exception(s, s->pc - 2, EXCP_PRIVILEGE); + return; + } + + ext = cpu_lduw_code(env, s->pc); + s->pc += 2; + + if (ext & 0x8000) { + reg = AREG(ext, 12); + } else { + reg = DREG(ext, 12); + } + gen_helper_movec(cpu_env, tcg_const_i32(ext & 0xfff), reg); + gen_lookup_tb(s); +} + +DISAS_INSN(intouch) +{ + if (IS_USER(s)) { + gen_exception(s, s->pc - 2, EXCP_PRIVILEGE); + return; + } + /* ICache fetch. Implement as no-op. */ +} + +DISAS_INSN(cpushl) +{ + if (IS_USER(s)) { + gen_exception(s, s->pc - 2, EXCP_PRIVILEGE); + return; + } + /* Cache push/invalidate. Implement as no-op. */ +} + +DISAS_INSN(wddata) +{ + gen_exception(s, s->pc - 2, EXCP_PRIVILEGE); +} + +DISAS_INSN(wdebug) +{ + M68kCPU *cpu = m68k_env_get_cpu(env); + + if (IS_USER(s)) { + gen_exception(s, s->pc - 2, EXCP_PRIVILEGE); + return; + } + /* TODO: Implement wdebug. */ + cpu_abort(CPU(cpu), "WDEBUG not implemented"); +} + +DISAS_INSN(trap) +{ + gen_exception(s, s->pc - 2, EXCP_TRAP0 + (insn & 0xf)); +} + +/* ??? FP exceptions are not implemented. Most exceptions are deferred until + immediately before the next FP instruction is executed. */ +DISAS_INSN(fpu) +{ + uint16_t ext; + int32_t offset; + int opmode; + TCGv_i64 src; + TCGv_i64 dest; + TCGv_i64 res; + TCGv tmp32; + int round; + int set_dest; + int opsize; + + ext = cpu_lduw_code(env, s->pc); + s->pc += 2; + opmode = ext & 0x7f; + switch ((ext >> 13) & 7) { + case 0: case 2: + break; + case 1: + goto undef; + case 3: /* fmove out */ + src = FREG(ext, 7); + tmp32 = tcg_temp_new_i32(); + /* fmove */ + /* ??? TODO: Proper behavior on overflow. */ + switch ((ext >> 10) & 7) { + case 0: + opsize = OS_LONG; + gen_helper_f64_to_i32(tmp32, cpu_env, src); + break; + case 1: + opsize = OS_SINGLE; + gen_helper_f64_to_f32(tmp32, cpu_env, src); + break; + case 4: + opsize = OS_WORD; + gen_helper_f64_to_i32(tmp32, cpu_env, src); + break; + case 5: /* OS_DOUBLE */ + tcg_gen_mov_i32(tmp32, AREG(insn, 0)); + switch ((insn >> 3) & 7) { + case 2: + case 3: + break; + case 4: + tcg_gen_addi_i32(tmp32, tmp32, -8); + break; + case 5: + offset = cpu_ldsw_code(env, s->pc); + s->pc += 2; + tcg_gen_addi_i32(tmp32, tmp32, offset); + break; + default: + goto undef; + } + gen_store64(s, tmp32, src); + switch ((insn >> 3) & 7) { + case 3: + tcg_gen_addi_i32(tmp32, tmp32, 8); + tcg_gen_mov_i32(AREG(insn, 0), tmp32); + break; + case 4: + tcg_gen_mov_i32(AREG(insn, 0), tmp32); + break; + } + tcg_temp_free_i32(tmp32); + return; + case 6: + opsize = OS_BYTE; + gen_helper_f64_to_i32(tmp32, cpu_env, src); + break; + default: + goto undef; + } + DEST_EA(env, insn, opsize, tmp32, NULL); + tcg_temp_free_i32(tmp32); + return; + case 4: /* fmove to control register. */ + switch ((ext >> 10) & 7) { + case 4: /* FPCR */ + /* Not implemented. Ignore writes. */ + break; + case 1: /* FPIAR */ + case 2: /* FPSR */ + default: + cpu_abort(NULL, "Unimplemented: fmove to control %d", + (ext >> 10) & 7); + } + break; + case 5: /* fmove from control register. */ + switch ((ext >> 10) & 7) { + case 4: /* FPCR */ + /* Not implemented. Always return zero. */ + tmp32 = tcg_const_i32(0); + break; + case 1: /* FPIAR */ + case 2: /* FPSR */ + default: + cpu_abort(NULL, "Unimplemented: fmove from control %d", + (ext >> 10) & 7); + goto undef; + } + DEST_EA(env, insn, OS_LONG, tmp32, NULL); + break; + case 6: /* fmovem */ + case 7: + { + TCGv addr; + uint16_t mask; + int i; + if ((ext & 0x1f00) != 0x1000 || (ext & 0xff) == 0) + goto undef; + tmp32 = gen_lea(env, s, insn, OS_LONG); + if (IS_NULL_QREG(tmp32)) { + gen_addr_fault(s); + return; + } + addr = tcg_temp_new_i32(); + tcg_gen_mov_i32(addr, tmp32); + mask = 0x80; + for (i = 0; i < 8; i++) { + if (ext & mask) { + dest = FREG(i, 0); + if (ext & (1 << 13)) { + /* store */ + tcg_gen_qemu_stf64(dest, addr, IS_USER(s)); + } else { + /* load */ + tcg_gen_qemu_ldf64(dest, addr, IS_USER(s)); + } + if (ext & (mask - 1)) + tcg_gen_addi_i32(addr, addr, 8); + } + mask >>= 1; + } + tcg_temp_free_i32(addr); + } + return; + } + if (ext & (1 << 14)) { + /* Source effective address. */ + switch ((ext >> 10) & 7) { + case 0: opsize = OS_LONG; break; + case 1: opsize = OS_SINGLE; break; + case 4: opsize = OS_WORD; break; + case 5: opsize = OS_DOUBLE; break; + case 6: opsize = OS_BYTE; break; + default: + goto undef; + } + if (opsize == OS_DOUBLE) { + tmp32 = tcg_temp_new_i32(); + tcg_gen_mov_i32(tmp32, AREG(insn, 0)); + switch ((insn >> 3) & 7) { + case 2: + case 3: + break; + case 4: + tcg_gen_addi_i32(tmp32, tmp32, -8); + break; + case 5: + offset = cpu_ldsw_code(env, s->pc); + s->pc += 2; + tcg_gen_addi_i32(tmp32, tmp32, offset); + break; + case 7: + offset = cpu_ldsw_code(env, s->pc); + offset += s->pc - 2; + s->pc += 2; + tcg_gen_addi_i32(tmp32, tmp32, offset); + break; + default: + goto undef; + } + src = gen_load64(s, tmp32); + switch ((insn >> 3) & 7) { + case 3: + tcg_gen_addi_i32(tmp32, tmp32, 8); + tcg_gen_mov_i32(AREG(insn, 0), tmp32); + break; + case 4: + tcg_gen_mov_i32(AREG(insn, 0), tmp32); + break; + } + tcg_temp_free_i32(tmp32); + } else { + SRC_EA(env, tmp32, opsize, 1, NULL); + src = tcg_temp_new_i64(); + switch (opsize) { + case OS_LONG: + case OS_WORD: + case OS_BYTE: + gen_helper_i32_to_f64(src, cpu_env, tmp32); + break; + case OS_SINGLE: + gen_helper_f32_to_f64(src, cpu_env, tmp32); + break; + } + } + } else { + /* Source register. */ + src = FREG(ext, 10); + } + dest = FREG(ext, 7); + res = tcg_temp_new_i64(); + if (opmode != 0x3a) + tcg_gen_mov_f64(res, dest); + round = 1; + set_dest = 1; + switch (opmode) { + case 0: case 0x40: case 0x44: /* fmove */ + tcg_gen_mov_f64(res, src); + break; + case 1: /* fint */ + gen_helper_iround_f64(res, cpu_env, src); + round = 0; + break; + case 3: /* fintrz */ + gen_helper_itrunc_f64(res, cpu_env, src); + round = 0; + break; + case 4: case 0x41: case 0x45: /* fsqrt */ + gen_helper_sqrt_f64(res, cpu_env, src); + break; + case 0x18: case 0x58: case 0x5c: /* fabs */ + gen_helper_abs_f64(res, src); + break; + case 0x1a: case 0x5a: case 0x5e: /* fneg */ + gen_helper_chs_f64(res, src); + break; + case 0x20: case 0x60: case 0x64: /* fdiv */ + gen_helper_div_f64(res, cpu_env, res, src); + break; + case 0x22: case 0x62: case 0x66: /* fadd */ + gen_helper_add_f64(res, cpu_env, res, src); + break; + case 0x23: case 0x63: case 0x67: /* fmul */ + gen_helper_mul_f64(res, cpu_env, res, src); + break; + case 0x28: case 0x68: case 0x6c: /* fsub */ + gen_helper_sub_f64(res, cpu_env, res, src); + break; + case 0x38: /* fcmp */ + gen_helper_sub_cmp_f64(res, cpu_env, res, src); + set_dest = 0; + round = 0; + break; + case 0x3a: /* ftst */ + tcg_gen_mov_f64(res, src); + set_dest = 0; + round = 0; + break; + default: + goto undef; + } + if (ext & (1 << 14)) { + tcg_temp_free_i64(src); + } + if (round) { + if (opmode & 0x40) { + if ((opmode & 0x4) != 0) + round = 0; + } else if ((s->fpcr & M68K_FPCR_PREC) == 0) { + round = 0; + } + } + if (round) { + TCGv tmp = tcg_temp_new_i32(); + gen_helper_f64_to_f32(tmp, cpu_env, res); + gen_helper_f32_to_f64(res, cpu_env, tmp); + tcg_temp_free_i32(tmp); + } + tcg_gen_mov_f64(QREG_FP_RESULT, res); + if (set_dest) { + tcg_gen_mov_f64(dest, res); + } + tcg_temp_free_i64(res); + return; +undef: + /* FIXME: Is this right for offset addressing modes? */ + s->pc -= 2; + disas_undef_fpu(env, s, insn); +} + +DISAS_INSN(fbcc) +{ + uint32_t offset; + uint32_t addr; + TCGv flag; + TCGLabel *l1; + + addr = s->pc; + offset = cpu_ldsw_code(env, s->pc); + s->pc += 2; + if (insn & (1 << 6)) { + offset = (offset << 16) | cpu_lduw_code(env, s->pc); + s->pc += 2; + } + + l1 = gen_new_label(); + /* TODO: Raise BSUN exception. */ + flag = tcg_temp_new(); + gen_helper_compare_f64(flag, cpu_env, QREG_FP_RESULT); + /* Jump to l1 if condition is true. */ + switch (insn & 0xf) { + case 0: /* f */ + break; + case 1: /* eq (=0) */ + tcg_gen_brcond_i32(TCG_COND_EQ, flag, tcg_const_i32(0), l1); + break; + case 2: /* ogt (=1) */ + tcg_gen_brcond_i32(TCG_COND_EQ, flag, tcg_const_i32(1), l1); + break; + case 3: /* oge (=0 or =1) */ + tcg_gen_brcond_i32(TCG_COND_LEU, flag, tcg_const_i32(1), l1); + break; + case 4: /* olt (=-1) */ + tcg_gen_brcond_i32(TCG_COND_LT, flag, tcg_const_i32(0), l1); + break; + case 5: /* ole (=-1 or =0) */ + tcg_gen_brcond_i32(TCG_COND_LE, flag, tcg_const_i32(0), l1); + break; + case 6: /* ogl (=-1 or =1) */ + tcg_gen_andi_i32(flag, flag, 1); + tcg_gen_brcond_i32(TCG_COND_NE, flag, tcg_const_i32(0), l1); + break; + case 7: /* or (=2) */ + tcg_gen_brcond_i32(TCG_COND_EQ, flag, tcg_const_i32(2), l1); + break; + case 8: /* un (<2) */ + tcg_gen_brcond_i32(TCG_COND_LT, flag, tcg_const_i32(2), l1); + break; + case 9: /* ueq (=0 or =2) */ + tcg_gen_andi_i32(flag, flag, 1); + tcg_gen_brcond_i32(TCG_COND_EQ, flag, tcg_const_i32(0), l1); + break; + case 10: /* ugt (>0) */ + tcg_gen_brcond_i32(TCG_COND_GT, flag, tcg_const_i32(0), l1); + break; + case 11: /* uge (>=0) */ + tcg_gen_brcond_i32(TCG_COND_GE, flag, tcg_const_i32(0), l1); + break; + case 12: /* ult (=-1 or =2) */ + tcg_gen_brcond_i32(TCG_COND_GEU, flag, tcg_const_i32(2), l1); + break; + case 13: /* ule (!=1) */ + tcg_gen_brcond_i32(TCG_COND_NE, flag, tcg_const_i32(1), l1); + break; + case 14: /* ne (!=0) */ + tcg_gen_brcond_i32(TCG_COND_NE, flag, tcg_const_i32(0), l1); + break; + case 15: /* t */ + tcg_gen_br(l1); + break; + } + gen_jmp_tb(s, 0, s->pc); + gen_set_label(l1); + gen_jmp_tb(s, 1, addr + offset); +} + +DISAS_INSN(frestore) +{ + M68kCPU *cpu = m68k_env_get_cpu(env); + + /* TODO: Implement frestore. */ + cpu_abort(CPU(cpu), "FRESTORE not implemented"); +} + +DISAS_INSN(fsave) +{ + M68kCPU *cpu = m68k_env_get_cpu(env); + + /* TODO: Implement fsave. */ + cpu_abort(CPU(cpu), "FSAVE not implemented"); +} + +static inline TCGv gen_mac_extract_word(DisasContext *s, TCGv val, int upper) +{ + TCGv tmp = tcg_temp_new(); + if (s->env->macsr & MACSR_FI) { + if (upper) + tcg_gen_andi_i32(tmp, val, 0xffff0000); + else + tcg_gen_shli_i32(tmp, val, 16); + } else if (s->env->macsr & MACSR_SU) { + if (upper) + tcg_gen_sari_i32(tmp, val, 16); + else + tcg_gen_ext16s_i32(tmp, val); + } else { + if (upper) + tcg_gen_shri_i32(tmp, val, 16); + else + tcg_gen_ext16u_i32(tmp, val); + } + return tmp; +} + +static void gen_mac_clear_flags(void) +{ + tcg_gen_andi_i32(QREG_MACSR, QREG_MACSR, + ~(MACSR_V | MACSR_Z | MACSR_N | MACSR_EV)); +} + +DISAS_INSN(mac) +{ + TCGv rx; + TCGv ry; + uint16_t ext; + int acc; + TCGv tmp; + TCGv addr; + TCGv loadval; + int dual; + TCGv saved_flags; + + if (!s->done_mac) { + s->mactmp = tcg_temp_new_i64(); + s->done_mac = 1; + } + + ext = cpu_lduw_code(env, s->pc); + s->pc += 2; + + acc = ((insn >> 7) & 1) | ((ext >> 3) & 2); + dual = ((insn & 0x30) != 0 && (ext & 3) != 0); + if (dual && !m68k_feature(s->env, M68K_FEATURE_CF_EMAC_B)) { + disas_undef(env, s, insn); + return; + } + if (insn & 0x30) { + /* MAC with load. */ + tmp = gen_lea(env, s, insn, OS_LONG); + addr = tcg_temp_new(); + tcg_gen_and_i32(addr, tmp, QREG_MAC_MASK); + /* Load the value now to ensure correct exception behavior. + Perform writeback after reading the MAC inputs. */ + loadval = gen_load(s, OS_LONG, addr, 0); + + acc ^= 1; + rx = (ext & 0x8000) ? AREG(ext, 12) : DREG(insn, 12); + ry = (ext & 8) ? AREG(ext, 0) : DREG(ext, 0); + } else { + loadval = addr = NULL_QREG; + rx = (insn & 0x40) ? AREG(insn, 9) : DREG(insn, 9); + ry = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0); + } + + gen_mac_clear_flags(); +#if 0 + l1 = -1; + /* Disabled because conditional branches clobber temporary vars. */ + if ((s->env->macsr & MACSR_OMC) != 0 && !dual) { + /* Skip the multiply if we know we will ignore it. */ + l1 = gen_new_label(); + tmp = tcg_temp_new(); + tcg_gen_andi_i32(tmp, QREG_MACSR, 1 << (acc + 8)); + gen_op_jmp_nz32(tmp, l1); + } +#endif + + if ((ext & 0x0800) == 0) { + /* Word. */ + rx = gen_mac_extract_word(s, rx, (ext & 0x80) != 0); + ry = gen_mac_extract_word(s, ry, (ext & 0x40) != 0); + } + if (s->env->macsr & MACSR_FI) { + gen_helper_macmulf(s->mactmp, cpu_env, rx, ry); + } else { + if (s->env->macsr & MACSR_SU) + gen_helper_macmuls(s->mactmp, cpu_env, rx, ry); + else + gen_helper_macmulu(s->mactmp, cpu_env, rx, ry); + switch ((ext >> 9) & 3) { + case 1: + tcg_gen_shli_i64(s->mactmp, s->mactmp, 1); + break; + case 3: + tcg_gen_shri_i64(s->mactmp, s->mactmp, 1); + break; + } + } + + if (dual) { + /* Save the overflow flag from the multiply. */ + saved_flags = tcg_temp_new(); + tcg_gen_mov_i32(saved_flags, QREG_MACSR); + } else { + saved_flags = NULL_QREG; + } + +#if 0 + /* Disabled because conditional branches clobber temporary vars. */ + if ((s->env->macsr & MACSR_OMC) != 0 && dual) { + /* Skip the accumulate if the value is already saturated. */ + l1 = gen_new_label(); + tmp = tcg_temp_new(); + gen_op_and32(tmp, QREG_MACSR, tcg_const_i32(MACSR_PAV0 << acc)); + gen_op_jmp_nz32(tmp, l1); + } +#endif + + if (insn & 0x100) + tcg_gen_sub_i64(MACREG(acc), MACREG(acc), s->mactmp); + else + tcg_gen_add_i64(MACREG(acc), MACREG(acc), s->mactmp); + + if (s->env->macsr & MACSR_FI) + gen_helper_macsatf(cpu_env, tcg_const_i32(acc)); + else if (s->env->macsr & MACSR_SU) + gen_helper_macsats(cpu_env, tcg_const_i32(acc)); + else + gen_helper_macsatu(cpu_env, tcg_const_i32(acc)); + +#if 0 + /* Disabled because conditional branches clobber temporary vars. */ + if (l1 != -1) + gen_set_label(l1); +#endif + + if (dual) { + /* Dual accumulate variant. */ + acc = (ext >> 2) & 3; + /* Restore the overflow flag from the multiplier. */ + tcg_gen_mov_i32(QREG_MACSR, saved_flags); +#if 0 + /* Disabled because conditional branches clobber temporary vars. */ + if ((s->env->macsr & MACSR_OMC) != 0) { + /* Skip the accumulate if the value is already saturated. */ + l1 = gen_new_label(); + tmp = tcg_temp_new(); + gen_op_and32(tmp, QREG_MACSR, tcg_const_i32(MACSR_PAV0 << acc)); + gen_op_jmp_nz32(tmp, l1); + } +#endif + if (ext & 2) + tcg_gen_sub_i64(MACREG(acc), MACREG(acc), s->mactmp); + else + tcg_gen_add_i64(MACREG(acc), MACREG(acc), s->mactmp); + if (s->env->macsr & MACSR_FI) + gen_helper_macsatf(cpu_env, tcg_const_i32(acc)); + else if (s->env->macsr & MACSR_SU) + gen_helper_macsats(cpu_env, tcg_const_i32(acc)); + else + gen_helper_macsatu(cpu_env, tcg_const_i32(acc)); +#if 0 + /* Disabled because conditional branches clobber temporary vars. */ + if (l1 != -1) + gen_set_label(l1); +#endif + } + gen_helper_mac_set_flags(cpu_env, tcg_const_i32(acc)); + + if (insn & 0x30) { + TCGv rw; + rw = (insn & 0x40) ? AREG(insn, 9) : DREG(insn, 9); + tcg_gen_mov_i32(rw, loadval); + /* FIXME: Should address writeback happen with the masked or + unmasked value? */ + switch ((insn >> 3) & 7) { + case 3: /* Post-increment. */ + tcg_gen_addi_i32(AREG(insn, 0), addr, 4); + break; + case 4: /* Pre-decrement. */ + tcg_gen_mov_i32(AREG(insn, 0), addr); + } + } +} + +DISAS_INSN(from_mac) +{ + TCGv rx; + TCGv_i64 acc; + int accnum; + + rx = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0); + accnum = (insn >> 9) & 3; + acc = MACREG(accnum); + if (s->env->macsr & MACSR_FI) { + gen_helper_get_macf(rx, cpu_env, acc); + } else if ((s->env->macsr & MACSR_OMC) == 0) { + tcg_gen_trunc_i64_i32(rx, acc); + } else if (s->env->macsr & MACSR_SU) { + gen_helper_get_macs(rx, acc); + } else { + gen_helper_get_macu(rx, acc); + } + if (insn & 0x40) { + tcg_gen_movi_i64(acc, 0); + tcg_gen_andi_i32(QREG_MACSR, QREG_MACSR, ~(MACSR_PAV0 << accnum)); + } +} + +DISAS_INSN(move_mac) +{ + /* FIXME: This can be done without a helper. */ + int src; + TCGv dest; + src = insn & 3; + dest = tcg_const_i32((insn >> 9) & 3); + gen_helper_mac_move(cpu_env, dest, tcg_const_i32(src)); + gen_mac_clear_flags(); + gen_helper_mac_set_flags(cpu_env, dest); +} + +DISAS_INSN(from_macsr) +{ + TCGv reg; + + reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0); + tcg_gen_mov_i32(reg, QREG_MACSR); +} + +DISAS_INSN(from_mask) +{ + TCGv reg; + reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0); + tcg_gen_mov_i32(reg, QREG_MAC_MASK); +} + +DISAS_INSN(from_mext) +{ + TCGv reg; + TCGv acc; + reg = (insn & 8) ? AREG(insn, 0) : DREG(insn, 0); + acc = tcg_const_i32((insn & 0x400) ? 2 : 0); + if (s->env->macsr & MACSR_FI) + gen_helper_get_mac_extf(reg, cpu_env, acc); + else + gen_helper_get_mac_exti(reg, cpu_env, acc); +} + +DISAS_INSN(macsr_to_ccr) +{ + tcg_gen_movi_i32(QREG_CC_X, 0); + tcg_gen_andi_i32(QREG_CC_DEST, QREG_MACSR, 0xf); + s->cc_op = CC_OP_FLAGS; +} + +DISAS_INSN(to_mac) +{ + TCGv_i64 acc; + TCGv val; + int accnum; + accnum = (insn >> 9) & 3; + acc = MACREG(accnum); + SRC_EA(env, val, OS_LONG, 0, NULL); + if (s->env->macsr & MACSR_FI) { + tcg_gen_ext_i32_i64(acc, val); + tcg_gen_shli_i64(acc, acc, 8); + } else if (s->env->macsr & MACSR_SU) { + tcg_gen_ext_i32_i64(acc, val); + } else { + tcg_gen_extu_i32_i64(acc, val); + } + tcg_gen_andi_i32(QREG_MACSR, QREG_MACSR, ~(MACSR_PAV0 << accnum)); + gen_mac_clear_flags(); + gen_helper_mac_set_flags(cpu_env, tcg_const_i32(accnum)); +} + +DISAS_INSN(to_macsr) +{ + TCGv val; + SRC_EA(env, val, OS_LONG, 0, NULL); + gen_helper_set_macsr(cpu_env, val); + gen_lookup_tb(s); +} + +DISAS_INSN(to_mask) +{ + TCGv val; + SRC_EA(env, val, OS_LONG, 0, NULL); + tcg_gen_ori_i32(QREG_MAC_MASK, val, 0xffff0000); +} + +DISAS_INSN(to_mext) +{ + TCGv val; + TCGv acc; + SRC_EA(env, val, OS_LONG, 0, NULL); + acc = tcg_const_i32((insn & 0x400) ? 2 : 0); + if (s->env->macsr & MACSR_FI) + gen_helper_set_mac_extf(cpu_env, val, acc); + else if (s->env->macsr & MACSR_SU) + gen_helper_set_mac_exts(cpu_env, val, acc); + else + gen_helper_set_mac_extu(cpu_env, val, acc); +} + +static disas_proc opcode_table[65536]; + +static void +register_opcode (disas_proc proc, uint16_t opcode, uint16_t mask) +{ + int i; + int from; + int to; + + /* Sanity check. All set bits must be included in the mask. */ + if (opcode & ~mask) { + fprintf(stderr, + "qemu internal error: bogus opcode definition %04x/%04x\n", + opcode, mask); + abort(); + } + /* This could probably be cleverer. For now just optimize the case where + the top bits are known. */ + /* Find the first zero bit in the mask. */ + i = 0x8000; + while ((i & mask) != 0) + i >>= 1; + /* Iterate over all combinations of this and lower bits. */ + if (i == 0) + i = 1; + else + i <<= 1; + from = opcode & ~(i - 1); + to = from + i; + for (i = from; i < to; i++) { + if ((i & mask) == opcode) + opcode_table[i] = proc; + } +} + +/* Register m68k opcode handlers. Order is important. + Later insn override earlier ones. */ +void register_m68k_insns (CPUM68KState *env) +{ +#define INSN(name, opcode, mask, feature) do { \ + if (m68k_feature(env, M68K_FEATURE_##feature)) \ + register_opcode(disas_##name, 0x##opcode, 0x##mask); \ + } while(0) + INSN(undef, 0000, 0000, CF_ISA_A); + INSN(arith_im, 0080, fff8, CF_ISA_A); + INSN(bitrev, 00c0, fff8, CF_ISA_APLUSC); + INSN(bitop_reg, 0100, f1c0, CF_ISA_A); + INSN(bitop_reg, 0140, f1c0, CF_ISA_A); + INSN(bitop_reg, 0180, f1c0, CF_ISA_A); + INSN(bitop_reg, 01c0, f1c0, CF_ISA_A); + INSN(arith_im, 0280, fff8, CF_ISA_A); + INSN(byterev, 02c0, fff8, CF_ISA_APLUSC); + INSN(arith_im, 0480, fff8, CF_ISA_A); + INSN(ff1, 04c0, fff8, CF_ISA_APLUSC); + INSN(arith_im, 0680, fff8, CF_ISA_A); + INSN(bitop_im, 0800, ffc0, CF_ISA_A); + INSN(bitop_im, 0840, ffc0, CF_ISA_A); + INSN(bitop_im, 0880, ffc0, CF_ISA_A); + INSN(bitop_im, 08c0, ffc0, CF_ISA_A); + INSN(arith_im, 0a80, fff8, CF_ISA_A); + INSN(arith_im, 0c00, ff38, CF_ISA_A); + INSN(move, 1000, f000, CF_ISA_A); + INSN(move, 2000, f000, CF_ISA_A); + INSN(move, 3000, f000, CF_ISA_A); + INSN(strldsr, 40e7, ffff, CF_ISA_APLUSC); + INSN(negx, 4080, fff8, CF_ISA_A); + INSN(move_from_sr, 40c0, fff8, CF_ISA_A); + INSN(lea, 41c0, f1c0, CF_ISA_A); + INSN(clr, 4200, ff00, CF_ISA_A); + INSN(undef, 42c0, ffc0, CF_ISA_A); + INSN(move_from_ccr, 42c0, fff8, CF_ISA_A); + INSN(neg, 4480, fff8, CF_ISA_A); + INSN(move_to_ccr, 44c0, ffc0, CF_ISA_A); + INSN(not, 4680, fff8, CF_ISA_A); + INSN(move_to_sr, 46c0, ffc0, CF_ISA_A); + INSN(pea, 4840, ffc0, CF_ISA_A); + INSN(swap, 4840, fff8, CF_ISA_A); + INSN(movem, 48c0, fbc0, CF_ISA_A); + INSN(ext, 4880, fff8, CF_ISA_A); + INSN(ext, 48c0, fff8, CF_ISA_A); + INSN(ext, 49c0, fff8, CF_ISA_A); + INSN(tst, 4a00, ff00, CF_ISA_A); + INSN(tas, 4ac0, ffc0, CF_ISA_B); + INSN(halt, 4ac8, ffff, CF_ISA_A); + INSN(pulse, 4acc, ffff, CF_ISA_A); + INSN(illegal, 4afc, ffff, CF_ISA_A); + INSN(mull, 4c00, ffc0, CF_ISA_A); + INSN(divl, 4c40, ffc0, CF_ISA_A); + INSN(sats, 4c80, fff8, CF_ISA_B); + INSN(trap, 4e40, fff0, CF_ISA_A); + INSN(link, 4e50, fff8, CF_ISA_A); + INSN(unlk, 4e58, fff8, CF_ISA_A); + INSN(move_to_usp, 4e60, fff8, USP); + INSN(move_from_usp, 4e68, fff8, USP); + INSN(nop, 4e71, ffff, CF_ISA_A); + INSN(stop, 4e72, ffff, CF_ISA_A); + INSN(rte, 4e73, ffff, CF_ISA_A); + INSN(rts, 4e75, ffff, CF_ISA_A); + INSN(movec, 4e7b, ffff, CF_ISA_A); + INSN(jump, 4e80, ffc0, CF_ISA_A); + INSN(jump, 4ec0, ffc0, CF_ISA_A); + INSN(addsubq, 5180, f1c0, CF_ISA_A); + INSN(scc, 50c0, f0f8, CF_ISA_A); + INSN(addsubq, 5080, f1c0, CF_ISA_A); + INSN(tpf, 51f8, fff8, CF_ISA_A); + + /* Branch instructions. */ + INSN(branch, 6000, f000, CF_ISA_A); + /* Disable long branch instructions, then add back the ones we want. */ + INSN(undef, 60ff, f0ff, CF_ISA_A); /* All long branches. */ + INSN(branch, 60ff, f0ff, CF_ISA_B); + INSN(undef, 60ff, ffff, CF_ISA_B); /* bra.l */ + INSN(branch, 60ff, ffff, BRAL); + + INSN(moveq, 7000, f100, CF_ISA_A); + INSN(mvzs, 7100, f100, CF_ISA_B); + INSN(or, 8000, f000, CF_ISA_A); + INSN(divw, 80c0, f0c0, CF_ISA_A); + INSN(addsub, 9000, f000, CF_ISA_A); + INSN(subx, 9180, f1f8, CF_ISA_A); + INSN(suba, 91c0, f1c0, CF_ISA_A); + + INSN(undef_mac, a000, f000, CF_ISA_A); + INSN(mac, a000, f100, CF_EMAC); + INSN(from_mac, a180, f9b0, CF_EMAC); + INSN(move_mac, a110, f9fc, CF_EMAC); + INSN(from_macsr,a980, f9f0, CF_EMAC); + INSN(from_mask, ad80, fff0, CF_EMAC); + INSN(from_mext, ab80, fbf0, CF_EMAC); + INSN(macsr_to_ccr, a9c0, ffff, CF_EMAC); + INSN(to_mac, a100, f9c0, CF_EMAC); + INSN(to_macsr, a900, ffc0, CF_EMAC); + INSN(to_mext, ab00, fbc0, CF_EMAC); + INSN(to_mask, ad00, ffc0, CF_EMAC); + + INSN(mov3q, a140, f1c0, CF_ISA_B); + INSN(cmp, b000, f1c0, CF_ISA_B); /* cmp.b */ + INSN(cmp, b040, f1c0, CF_ISA_B); /* cmp.w */ + INSN(cmpa, b0c0, f1c0, CF_ISA_B); /* cmpa.w */ + INSN(cmp, b080, f1c0, CF_ISA_A); + INSN(cmpa, b1c0, f1c0, CF_ISA_A); + INSN(eor, b180, f1c0, CF_ISA_A); + INSN(and, c000, f000, CF_ISA_A); + INSN(mulw, c0c0, f0c0, CF_ISA_A); + INSN(addsub, d000, f000, CF_ISA_A); + INSN(addx, d180, f1f8, CF_ISA_A); + INSN(adda, d1c0, f1c0, CF_ISA_A); + INSN(shift_im, e080, f0f0, CF_ISA_A); + INSN(shift_reg, e0a0, f0f0, CF_ISA_A); + INSN(undef_fpu, f000, f000, CF_ISA_A); + INSN(fpu, f200, ffc0, CF_FPU); + INSN(fbcc, f280, ffc0, CF_FPU); + INSN(frestore, f340, ffc0, CF_FPU); + INSN(fsave, f340, ffc0, CF_FPU); + INSN(intouch, f340, ffc0, CF_ISA_A); + INSN(cpushl, f428, ff38, CF_ISA_A); + INSN(wddata, fb00, ff00, CF_ISA_A); + INSN(wdebug, fbc0, ffc0, CF_ISA_A); +#undef INSN +} + +/* ??? Some of this implementation is not exception safe. We should always + write back the result to memory before setting the condition codes. */ +static void disas_m68k_insn(CPUM68KState * env, DisasContext *s) +{ + uint16_t insn; + + if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP | CPU_LOG_TB_OP_OPT))) { + tcg_gen_debug_insn_start(s->pc); + } + + insn = cpu_lduw_code(env, s->pc); + s->pc += 2; + + opcode_table[insn](env, s, insn); +} + +/* generate intermediate code for basic block 'tb'. */ +static inline void +gen_intermediate_code_internal(M68kCPU *cpu, TranslationBlock *tb, + bool search_pc) +{ + CPUState *cs = CPU(cpu); + CPUM68KState *env = &cpu->env; + DisasContext dc1, *dc = &dc1; + CPUBreakpoint *bp; + int j, lj; + target_ulong pc_start; + int pc_offset; + int num_insns; + int max_insns; + + /* generate intermediate code */ + pc_start = tb->pc; + + dc->tb = tb; + + dc->env = env; + dc->is_jmp = DISAS_NEXT; + dc->pc = pc_start; + dc->cc_op = CC_OP_DYNAMIC; + dc->singlestep_enabled = cs->singlestep_enabled; + dc->fpcr = env->fpcr; + dc->user = (env->sr & SR_S) == 0; + dc->done_mac = 0; + lj = -1; + num_insns = 0; + max_insns = tb->cflags & CF_COUNT_MASK; + if (max_insns == 0) + max_insns = CF_COUNT_MASK; + + gen_tb_start(tb); + do { + pc_offset = dc->pc - pc_start; + gen_throws_exception = NULL; + if (unlikely(!QTAILQ_EMPTY(&cs->breakpoints))) { + QTAILQ_FOREACH(bp, &cs->breakpoints, entry) { + if (bp->pc == dc->pc) { + gen_exception(dc, dc->pc, EXCP_DEBUG); + dc->is_jmp = DISAS_JUMP; + break; + } + } + if (dc->is_jmp) + break; + } + if (search_pc) { + j = tcg_op_buf_count(); + if (lj < j) { + lj++; + while (lj < j) + tcg_ctx.gen_opc_instr_start[lj++] = 0; + } + tcg_ctx.gen_opc_pc[lj] = dc->pc; + tcg_ctx.gen_opc_instr_start[lj] = 1; + tcg_ctx.gen_opc_icount[lj] = num_insns; + } + if (num_insns + 1 == max_insns && (tb->cflags & CF_LAST_IO)) + gen_io_start(); + dc->insn_pc = dc->pc; + disas_m68k_insn(env, dc); + num_insns++; + } while (!dc->is_jmp && !tcg_op_buf_full() && + !cs->singlestep_enabled && + !singlestep && + (pc_offset) < (TARGET_PAGE_SIZE - 32) && + num_insns < max_insns); + + if (tb->cflags & CF_LAST_IO) + gen_io_end(); + if (unlikely(cs->singlestep_enabled)) { + /* Make sure the pc is updated, and raise a debug exception. */ + if (!dc->is_jmp) { + gen_flush_cc_op(dc); + tcg_gen_movi_i32(QREG_PC, dc->pc); + } + gen_helper_raise_exception(cpu_env, tcg_const_i32(EXCP_DEBUG)); + } else { + switch(dc->is_jmp) { + case DISAS_NEXT: + gen_flush_cc_op(dc); + gen_jmp_tb(dc, 0, dc->pc); + break; + default: + case DISAS_JUMP: + case DISAS_UPDATE: + gen_flush_cc_op(dc); + /* indicate that the hash table must be used to find the next TB */ + tcg_gen_exit_tb(0); + break; + case DISAS_TB_JUMP: + /* nothing more to generate */ + break; + } + } + gen_tb_end(tb, num_insns); + +#ifdef DEBUG_DISAS + if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) { + qemu_log("----------------\n"); + qemu_log("IN: %s\n", lookup_symbol(pc_start)); + log_target_disas(cs, pc_start, dc->pc - pc_start, 0); + qemu_log("\n"); + } +#endif + if (search_pc) { + j = tcg_op_buf_count(); + lj++; + while (lj <= j) + tcg_ctx.gen_opc_instr_start[lj++] = 0; + } else { + tb->size = dc->pc - pc_start; + tb->icount = num_insns; + } + + //optimize_flags(); + //expand_target_qops(); +} + +void gen_intermediate_code(CPUM68KState *env, TranslationBlock *tb) +{ + gen_intermediate_code_internal(m68k_env_get_cpu(env), tb, false); +} + +void gen_intermediate_code_pc(CPUM68KState *env, TranslationBlock *tb) +{ + gen_intermediate_code_internal(m68k_env_get_cpu(env), tb, true); +} + +void m68k_cpu_dump_state(CPUState *cs, FILE *f, fprintf_function cpu_fprintf, + int flags) +{ + M68kCPU *cpu = M68K_CPU(cs); + CPUM68KState *env = &cpu->env; + int i; + uint16_t sr; + CPU_DoubleU u; + for (i = 0; i < 8; i++) + { + u.d = env->fregs[i]; + cpu_fprintf (f, "D%d = %08x A%d = %08x F%d = %08x%08x (%12g)\n", + i, env->dregs[i], i, env->aregs[i], + i, u.l.upper, u.l.lower, *(double *)&u.d); + } + cpu_fprintf (f, "PC = %08x ", env->pc); + sr = env->sr; + cpu_fprintf (f, "SR = %04x %c%c%c%c%c ", sr, (sr & 0x10) ? 'X' : '-', + (sr & CCF_N) ? 'N' : '-', (sr & CCF_Z) ? 'Z' : '-', + (sr & CCF_V) ? 'V' : '-', (sr & CCF_C) ? 'C' : '-'); + cpu_fprintf (f, "FPRESULT = %12g\n", *(double *)&env->fp_result); +} + +void restore_state_to_opc(CPUM68KState *env, TranslationBlock *tb, int pc_pos) +{ + env->pc = tcg_ctx.gen_opc_pc[pc_pos]; +} |