diff options
Diffstat (limited to 'target-m68k/translate.c')
| -rw-r--r-- | target-m68k/translate.c | 3595 |
1 files changed, 0 insertions, 3595 deletions
diff --git a/target-m68k/translate.c b/target-m68k/translate.c deleted file mode 100644 index d6ed883882..0000000000 --- a/target-m68k/translate.c +++ /dev/null @@ -1,3595 +0,0 @@ -/* - * 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 "qemu/osdep.h" -#include "cpu.h" -#include "disas/disas.h" -#include "exec/exec-all.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" -#include "exec/log.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_env 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 REG(insn, pos) (((insn) >> (pos)) & 7) -#define DREG(insn, pos) cpu_dregs[REG(insn, pos)] -#define AREG(insn, pos) cpu_aregs[REG(insn, pos)] -#define FREG(insn, pos) cpu_fregs[REG(insn, pos)] -#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; - - cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env"); - tcg_ctx.tcg_env = cpu_env; - -#define DEFO32(name, offset) \ - QREG_##name = tcg_global_mem_new_i32(cpu_env, \ - offsetof(CPUM68KState, offset), #name); -#define DEFO64(name, offset) \ - QREG_##name = tcg_global_mem_new_i64(cpu_env, \ - 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(cpu_env, - -offsetof(M68kCPU, env) + - offsetof(CPUState, halted), "HALTED"); - cpu_exception_index = tcg_global_mem_new_i32(cpu_env, - -offsetof(M68kCPU, env) + - offsetof(CPUState, exception_index), - "EXCEPTION"); - - p = cpu_reg_names; - for (i = 0; i < 8; i++) { - sprintf(p, "D%d", i); - cpu_dregs[i] = tcg_global_mem_new(cpu_env, - offsetof(CPUM68KState, dregs[i]), p); - p += 3; - sprintf(p, "A%d", i); - cpu_aregs[i] = tcg_global_mem_new(cpu_env, - offsetof(CPUM68KState, aregs[i]), p); - p += 3; - sprintf(p, "F%d", i); - cpu_fregs[i] = tcg_global_mem_new_i64(cpu_env, - 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(cpu_env, - offsetof(CPUM68KState, macc[i]), p); - p += 5; - } - - NULL_QREG = tcg_global_mem_new(cpu_env, -4, "NULL"); - store_dummy = tcg_global_mem_new(cpu_env, -8, "NULL"); -} - -/* internal defines */ -typedef struct DisasContext { - CPUM68KState *env; - target_ulong insn_pc; /* Start of the current instruction. */ - target_ulong pc; - int is_jmp; - CCOp cc_op; /* Current CC operation */ - int cc_op_synced; - 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 - -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(env, s, 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 - -static const uint8_t cc_op_live[CC_OP_NB] = { - [CC_OP_FLAGS] = CCF_C | CCF_V | CCF_Z | CCF_N | CCF_X, - [CC_OP_ADDB ... CC_OP_ADDL] = CCF_X | CCF_N | CCF_V, - [CC_OP_SUBB ... CC_OP_SUBL] = CCF_X | CCF_N | CCF_V, - [CC_OP_CMPB ... CC_OP_CMPL] = CCF_X | CCF_N | CCF_V, - [CC_OP_LOGIC] = CCF_X | CCF_N -}; - -static void set_cc_op(DisasContext *s, CCOp op) -{ - CCOp old_op = s->cc_op; - int dead; - - if (old_op == op) { - return; - } - s->cc_op = op; - s->cc_op_synced = 0; - - /* Discard CC computation that will no longer be used. - Note that X and N are never dead. */ - dead = cc_op_live[old_op] & ~cc_op_live[op]; - if (dead & CCF_C) { - tcg_gen_discard_i32(QREG_CC_C); - } - if (dead & CCF_Z) { - tcg_gen_discard_i32(QREG_CC_Z); - } - if (dead & CCF_V) { - tcg_gen_discard_i32(QREG_CC_V); - } -} - -/* Update the CPU env CC_OP state. */ -static void update_cc_op(DisasContext *s) -{ - if (!s->cc_op_synced) { - s->cc_op_synced = 1; - tcg_gen_movi_i32(QREG_CC_OP, s->cc_op); - } -} - -/* 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 16-bit immediate constant */ -static inline uint16_t read_im16(CPUM68KState *env, DisasContext *s) -{ - uint16_t im; - im = cpu_lduw_code(env, s->pc); - s->pc += 2; - return im; -} - -/* Read an 8-bit immediate constant */ -static inline uint8_t read_im8(CPUM68KState *env, DisasContext *s) -{ - return read_im16(env, s); -} - -/* Read a 32-bit immediate constant. */ -static inline uint32_t read_im32(CPUM68KState *env, DisasContext *s) -{ - uint32_t im; - im = read_im16(env, s) << 16; - im |= 0xffff & read_im16(env, s); - 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 = read_im16(env, s); - - if ((ext & 0x800) == 0 && !m68k_feature(s->env, M68K_FEATURE_WORD_INDEX)) - return NULL_QREG; - - if (m68k_feature(s->env, M68K_FEATURE_M68000) && - !m68k_feature(s->env, M68K_FEATURE_SCALED_INDEX)) { - ext &= ~(3 << 9); - } - - 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)read_im16(env, s); - } 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)read_im16(env, s); - } 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; -} - -/* Sign or zero extend a value. */ - -static inline void gen_ext(TCGv res, TCGv val, int opsize, int sign) -{ - switch (opsize) { - case OS_BYTE: - if (sign) { - tcg_gen_ext8s_i32(res, val); - } else { - tcg_gen_ext8u_i32(res, val); - } - break; - case OS_WORD: - if (sign) { - tcg_gen_ext16s_i32(res, val); - } else { - tcg_gen_ext16u_i32(res, val); - } - break; - case OS_LONG: - tcg_gen_mov_i32(res, val); - break; - default: - g_assert_not_reached(); - } -} - -/* Evaluate all the CC flags. */ - -static void gen_flush_flags(DisasContext *s) -{ - TCGv t0, t1; - - switch (s->cc_op) { - case CC_OP_FLAGS: - return; - - case CC_OP_ADDB: - case CC_OP_ADDW: - case CC_OP_ADDL: - tcg_gen_mov_i32(QREG_CC_C, QREG_CC_X); - tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N); - /* Compute signed overflow for addition. */ - t0 = tcg_temp_new(); - t1 = tcg_temp_new(); - tcg_gen_sub_i32(t0, QREG_CC_N, QREG_CC_V); - gen_ext(t0, t0, s->cc_op - CC_OP_ADDB, 1); - tcg_gen_xor_i32(t1, QREG_CC_N, QREG_CC_V); - tcg_gen_xor_i32(QREG_CC_V, QREG_CC_V, t0); - tcg_temp_free(t0); - tcg_gen_andc_i32(QREG_CC_V, t1, QREG_CC_V); - tcg_temp_free(t1); - break; - - case CC_OP_SUBB: - case CC_OP_SUBW: - case CC_OP_SUBL: - tcg_gen_mov_i32(QREG_CC_C, QREG_CC_X); - tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N); - /* Compute signed overflow for subtraction. */ - t0 = tcg_temp_new(); - t1 = tcg_temp_new(); - tcg_gen_add_i32(t0, QREG_CC_N, QREG_CC_V); - gen_ext(t0, t0, s->cc_op - CC_OP_SUBB, 1); - tcg_gen_xor_i32(t1, QREG_CC_N, QREG_CC_V); - tcg_gen_xor_i32(QREG_CC_V, QREG_CC_V, t0); - tcg_temp_free(t0); - tcg_gen_and_i32(QREG_CC_V, QREG_CC_V, t1); - tcg_temp_free(t1); - break; - - case CC_OP_CMPB: - case CC_OP_CMPW: - case CC_OP_CMPL: - tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_C, QREG_CC_N, QREG_CC_V); - tcg_gen_sub_i32(QREG_CC_Z, QREG_CC_N, QREG_CC_V); - gen_ext(QREG_CC_Z, QREG_CC_Z, s->cc_op - CC_OP_CMPB, 1); - /* Compute signed overflow for subtraction. */ - t0 = tcg_temp_new(); - tcg_gen_xor_i32(t0, QREG_CC_Z, QREG_CC_N); - tcg_gen_xor_i32(QREG_CC_V, QREG_CC_V, QREG_CC_N); - tcg_gen_and_i32(QREG_CC_V, QREG_CC_V, t0); - tcg_temp_free(t0); - tcg_gen_mov_i32(QREG_CC_N, QREG_CC_Z); - break; - - case CC_OP_LOGIC: - tcg_gen_mov_i32(QREG_CC_Z, QREG_CC_N); - tcg_gen_movi_i32(QREG_CC_C, 0); - tcg_gen_movi_i32(QREG_CC_V, 0); - break; - - case CC_OP_DYNAMIC: - gen_helper_flush_flags(cpu_env, QREG_CC_OP); - break; - - default: - t0 = tcg_const_i32(s->cc_op); - gen_helper_flush_flags(cpu_env, t0); - tcg_temp_free(t0); - break; - } - - /* Note that flush_flags also assigned to env->cc_op. */ - s->cc_op = CC_OP_FLAGS; - s->cc_op_synced = 1; -} - -static inline TCGv gen_extend(TCGv val, int opsize, int sign) -{ - TCGv tmp; - - if (opsize == OS_LONG) { - tmp = val; - } else { - tmp = tcg_temp_new(); - gen_ext(tmp, val, opsize, sign); - } - - return tmp; -} - -static void gen_logic_cc(DisasContext *s, TCGv val, int opsize) -{ - gen_ext(QREG_CC_N, val, opsize, 1); - set_cc_op(s, CC_OP_LOGIC); -} - -static void gen_update_cc_cmp(DisasContext *s, TCGv dest, TCGv src, int opsize) -{ - tcg_gen_mov_i32(QREG_CC_N, dest); - tcg_gen_mov_i32(QREG_CC_V, src); - set_cc_op(s, CC_OP_CMPB + opsize); -} - -static void gen_update_cc_add(TCGv dest, TCGv src, int opsize) -{ - gen_ext(QREG_CC_N, dest, opsize, 1); - tcg_gen_mov_i32(QREG_CC_V, 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; - case OS_EXTENDED: return 12; - case OS_PACKED: return 12; - default: - g_assert_not_reached(); - } -} - -static inline int insn_opsize(int insn) -{ - switch ((insn >> 6) & 3) { - case 0: return OS_BYTE; - case 1: return OS_WORD; - case 2: return OS_LONG; - 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(); - } -} - -/* 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 = read_im16(env, s); - 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 = (int16_t)read_im16(env, s); - 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 += (int16_t)read_im16(env, s); - 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 = (int8_t)read_im8(env, s); - } else { - offset = read_im8(env, s); - } - break; - case OS_WORD: - if (what == EA_LOADS) { - offset = (int16_t)read_im16(env, s); - } else { - offset = read_im16(env, s); - } - 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; -} - -typedef struct { - TCGCond tcond; - bool g1; - bool g2; - TCGv v1; - TCGv v2; -} DisasCompare; - -static void gen_cc_cond(DisasCompare *c, DisasContext *s, int cond) -{ - TCGv tmp, tmp2; - TCGCond tcond; - CCOp op = s->cc_op; - - /* The CC_OP_CMP form can handle most normal comparisons directly. */ - if (op == CC_OP_CMPB || op == CC_OP_CMPW || op == CC_OP_CMPL) { - c->g1 = c->g2 = 1; - c->v1 = QREG_CC_N; - c->v2 = QREG_CC_V; - switch (cond) { - case 2: /* HI */ - case 3: /* LS */ - tcond = TCG_COND_LEU; - goto done; - case 4: /* CC */ - case 5: /* CS */ - tcond = TCG_COND_LTU; - goto done; - case 6: /* NE */ - case 7: /* EQ */ - tcond = TCG_COND_EQ; - goto done; - case 10: /* PL */ - case 11: /* MI */ - c->g1 = c->g2 = 0; - c->v2 = tcg_const_i32(0); - c->v1 = tmp = tcg_temp_new(); - tcg_gen_sub_i32(tmp, QREG_CC_N, QREG_CC_V); - gen_ext(tmp, tmp, op - CC_OP_CMPB, 1); - /* fallthru */ - case 12: /* GE */ - case 13: /* LT */ - tcond = TCG_COND_LT; - goto done; - case 14: /* GT */ - case 15: /* LE */ - tcond = TCG_COND_LE; - goto done; - } - } - - c->g1 = 1; - c->g2 = 0; - c->v2 = tcg_const_i32(0); - - switch (cond) { - case 0: /* T */ - case 1: /* F */ - c->v1 = c->v2; - tcond = TCG_COND_NEVER; - goto done; - case 14: /* GT (!(Z || (N ^ V))) */ - case 15: /* LE (Z || (N ^ V)) */ - /* Logic operations clear V, which simplifies LE to (Z || N), - and since Z and N are co-located, this becomes a normal - comparison vs N. */ - if (op == CC_OP_LOGIC) { - c->v1 = QREG_CC_N; - tcond = TCG_COND_LE; - goto done; - } - break; - case 12: /* GE (!(N ^ V)) */ - case 13: /* LT (N ^ V) */ - /* Logic operations clear V, which simplifies this to N. */ - if (op != CC_OP_LOGIC) { - break; - } - /* fallthru */ - case 10: /* PL (!N) */ - case 11: /* MI (N) */ - /* Several cases represent N normally. */ - if (op == CC_OP_ADDB || op == CC_OP_ADDW || op == CC_OP_ADDL || - op == CC_OP_SUBB || op == CC_OP_SUBW || op == CC_OP_SUBL || - op == CC_OP_LOGIC) { - c->v1 = QREG_CC_N; - tcond = TCG_COND_LT; - goto done; - } - break; - case 6: /* NE (!Z) */ - case 7: /* EQ (Z) */ - /* Some cases fold Z into N. */ - if (op == CC_OP_ADDB || op == CC_OP_ADDW || op == CC_OP_ADDL || - op == CC_OP_SUBB || op == CC_OP_SUBW || op == CC_OP_SUBL || - op == CC_OP_LOGIC) { - tcond = TCG_COND_EQ; - c->v1 = QREG_CC_N; - goto done; - } - break; - case 4: /* CC (!C) */ - case 5: /* CS (C) */ - /* Some cases fold C into X. */ - if (op == CC_OP_ADDB || op == CC_OP_ADDW || op == CC_OP_ADDL || - op == CC_OP_ADDB || op == CC_OP_ADDW || op == CC_OP_ADDL) { - tcond = TCG_COND_NE; - c->v1 = QREG_CC_X; - goto done; - } - /* fallthru */ - case 8: /* VC (!V) */ - case 9: /* VS (V) */ - /* Logic operations clear V and C. */ - if (op == CC_OP_LOGIC) { - tcond = TCG_COND_NEVER; - c->v1 = c->v2; - goto done; - } - break; - } - - /* Otherwise, flush flag state to CC_OP_FLAGS. */ - gen_flush_flags(s); - - switch (cond) { - case 0: /* T */ - case 1: /* F */ - default: - /* Invalid, or handled above. */ - abort(); - case 2: /* HI (!C && !Z) -> !(C || Z)*/ - case 3: /* LS (C || Z) */ - c->v1 = tmp = tcg_temp_new(); - c->g1 = 0; - tcg_gen_setcond_i32(TCG_COND_EQ, tmp, QREG_CC_Z, c->v2); - tcg_gen_or_i32(tmp, tmp, QREG_CC_C); - tcond = TCG_COND_NE; - break; - case 4: /* CC (!C) */ - case 5: /* CS (C) */ - c->v1 = QREG_CC_C; - tcond = TCG_COND_NE; - break; - case 6: /* NE (!Z) */ - case 7: /* EQ (Z) */ - c->v1 = QREG_CC_Z; - tcond = TCG_COND_EQ; - break; - case 8: /* VC (!V) */ - case 9: /* VS (V) */ - c->v1 = QREG_CC_V; - tcond = TCG_COND_LT; - break; - case 10: /* PL (!N) */ - case 11: /* MI (N) */ - c->v1 = QREG_CC_N; - tcond = TCG_COND_LT; - break; - case 12: /* GE (!(N ^ V)) */ - case 13: /* LT (N ^ V) */ - c->v1 = tmp = tcg_temp_new(); - c->g1 = 0; - tcg_gen_xor_i32(tmp, QREG_CC_N, QREG_CC_V); - tcond = TCG_COND_LT; - break; - case 14: /* GT (!(Z || (N ^ V))) */ - case 15: /* LE (Z || (N ^ V)) */ - c->v1 = tmp = tcg_temp_new(); - c->g1 = 0; - tcg_gen_setcond_i32(TCG_COND_EQ, tmp, QREG_CC_Z, c->v2); - tcg_gen_neg_i32(tmp, tmp); - tmp2 = tcg_temp_new(); - tcg_gen_xor_i32(tmp2, QREG_CC_N, QREG_CC_V); - tcg_gen_or_i32(tmp, tmp, tmp2); - tcg_temp_free(tmp2); - tcond = TCG_COND_LT; - break; - } - - done: - if ((cond & 1) == 0) { - tcond = tcg_invert_cond(tcond); - } - c->tcond = tcond; -} - -static void free_cond(DisasCompare *c) -{ - if (!c->g1) { - tcg_temp_free(c->v1); - } - if (!c->g2) { - tcg_temp_free(c->v2); - } -} - -static void gen_jmpcc(DisasContext *s, int cond, TCGLabel *l1) -{ - DisasCompare c; - - gen_cc_cond(&c, s, cond); - update_cc_op(s); - tcg_gen_brcond_i32(c.tcond, c.v1, c.v2, l1); - free_cond(&c); -} - -/* Force a TB lookup after an instruction that changes the CPU state. */ -static void gen_lookup_tb(DisasContext *s) -{ - update_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) -{ - update_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) -{ - update_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) -{ - update_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) - -static inline bool use_goto_tb(DisasContext *s, uint32_t dest) -{ -#ifndef CONFIG_USER_ONLY - return (s->tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK) || - (s->insn_pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK); -#else - return true; -#endif -} - -/* Generate a jump to an immediate address. */ -static void gen_jmp_tb(DisasContext *s, int n, uint32_t dest) -{ - if (unlikely(s->singlestep_enabled)) { - gen_exception(s, dest, EXCP_DEBUG); - } else if (use_goto_tb(s, dest)) { - tcg_gen_goto_tb(n); - tcg_gen_movi_i32(QREG_PC, dest); - tcg_gen_exit_tb((uintptr_t)s->tb + n); - } else { - gen_jmp_im(s, dest); - tcg_gen_exit_tb(0); - } - s->is_jmp = DISAS_TB_JUMP; -} - -DISAS_INSN(scc) -{ - DisasCompare c; - int cond; - TCGv tmp; - - cond = (insn >> 8) & 0xf; - gen_cc_cond(&c, s, cond); - - tmp = tcg_temp_new(); - tcg_gen_setcond_i32(c.tcond, tmp, c.v1, c.v2); - free_cond(&c); - - tcg_gen_neg_i32(tmp, tmp); - DEST_EA(env, insn, OS_BYTE, tmp, NULL); - tcg_temp_free(tmp); -} - -DISAS_INSN(dbcc) -{ - TCGLabel *l1; - TCGv reg; - TCGv tmp; - int16_t offset; - uint32_t base; - - reg = DREG(insn, 0); - base = s->pc; - offset = (int16_t)read_im16(env, s); - l1 = gen_new_label(); - gen_jmpcc(s, (insn >> 8) & 0xf, l1); - - tmp = tcg_temp_new(); - tcg_gen_ext16s_i32(tmp, reg); - tcg_gen_addi_i32(tmp, tmp, -1); - gen_partset_reg(OS_WORD, reg, tmp); - tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, -1, l1); - gen_jmp_tb(s, 1, base + offset); - gen_set_label(l1); - gen_jmp_tb(s, 0, s->pc); -} - -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); - gen_logic_cc(s, tmp, OS_LONG); -} - -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); - - set_cc_op(s, CC_OP_FLAGS); -} - -DISAS_INSN(divl) -{ - TCGv num; - TCGv den; - TCGv reg; - uint16_t ext; - - ext = read_im16(env, s); - 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); - } - set_cc_op(s, CC_OP_FLAGS); -} - -DISAS_INSN(addsub) -{ - TCGv reg; - TCGv dest; - TCGv src; - TCGv tmp; - TCGv addr; - int add; - int opsize; - - add = (insn & 0x4000) != 0; - opsize = insn_opsize(insn); - reg = gen_extend(DREG(insn, 9), opsize, 1); - dest = tcg_temp_new(); - if (insn & 0x100) { - SRC_EA(env, tmp, opsize, 1, &addr); - src = reg; - } else { - tmp = reg; - SRC_EA(env, src, opsize, 1, NULL); - } - if (add) { - tcg_gen_add_i32(dest, tmp, src); - tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, dest, src); - set_cc_op(s, CC_OP_ADDB + opsize); - } else { - tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, tmp, src); - tcg_gen_sub_i32(dest, tmp, src); - set_cc_op(s, CC_OP_SUBB + opsize); - } - gen_update_cc_add(dest, src, opsize); - if (insn & 0x100) { - DEST_EA(env, insn, opsize, dest, &addr); - } else { - gen_partset_reg(opsize, DREG(insn, 9), dest); - } - tcg_temp_free(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); - - gen_flush_flags(s); - src2 = tcg_temp_new(); - if (opsize == OS_BYTE) - tcg_gen_andi_i32(src2, DREG(insn, 9), 7); - else - tcg_gen_andi_i32(src2, DREG(insn, 9), 31); - - tmp = tcg_const_i32(1); - tcg_gen_shl_i32(tmp, tmp, src2); - tcg_temp_free(src2); - - tcg_gen_and_i32(QREG_CC_Z, src1, tmp); - - dest = tcg_temp_new(); - switch (op) { - case 1: /* bchg */ - tcg_gen_xor_i32(dest, src1, tmp); - break; - case 2: /* bclr */ - tcg_gen_andc_i32(dest, src1, tmp); - break; - case 3: /* bset */ - tcg_gen_or_i32(dest, src1, tmp); - break; - default: /* btst */ - break; - } - tcg_temp_free(tmp); - if (op) { - DEST_EA(env, insn, opsize, dest, &addr); - } - tcg_temp_free(dest); -} - -DISAS_INSN(sats) -{ - TCGv reg; - reg = DREG(insn, 0); - gen_flush_flags(s); - gen_helper_sats(reg, reg, QREG_CC_V); - gen_logic_cc(s, reg, OS_LONG); -} - -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 = read_im16(env, s); - 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 = read_im16(env, s); - 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; - - tcg_gen_andi_i32(QREG_CC_Z, src1, mask); - - if (op) { - tmp = tcg_temp_new(); - 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); - tcg_temp_free(tmp); - } -} - -DISAS_INSN(arith_im) -{ - int op; - TCGv im; - TCGv src1; - TCGv dest; - TCGv addr; - int opsize; - - op = (insn >> 9) & 7; - opsize = insn_opsize(insn); - switch (opsize) { - case OS_BYTE: - im = tcg_const_i32((int8_t)read_im8(env, s)); - break; - case OS_WORD: - im = tcg_const_i32((int16_t)read_im16(env, s)); - break; - case OS_LONG: - im = tcg_const_i32(read_im32(env, s)); - break; - default: - abort(); - } - SRC_EA(env, src1, opsize, 1, (op == 6) ? NULL : &addr); - dest = tcg_temp_new(); - switch (op) { - case 0: /* ori */ - tcg_gen_or_i32(dest, src1, im); - gen_logic_cc(s, dest, opsize); - break; - case 1: /* andi */ - tcg_gen_and_i32(dest, src1, im); - gen_logic_cc(s, dest, opsize); - break; - case 2: /* subi */ - tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, src1, im); - tcg_gen_sub_i32(dest, src1, im); - gen_update_cc_add(dest, im, opsize); - set_cc_op(s, CC_OP_SUBB + opsize); - break; - case 3: /* addi */ - tcg_gen_add_i32(dest, src1, im); - gen_update_cc_add(dest, im, opsize); - tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, dest, im); - set_cc_op(s, CC_OP_ADDB + opsize); - break; - case 5: /* eori */ - tcg_gen_xor_i32(dest, src1, im); - gen_logic_cc(s, dest, opsize); - break; - case 6: /* cmpi */ - gen_update_cc_cmp(s, src1, im, opsize); - break; - default: - abort(); - } - tcg_temp_free(im); - if (op != 6) { - DEST_EA(env, insn, opsize, dest, &addr); - } - tcg_temp_free(dest); -} - -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, opsize); - } -} - -DISAS_INSN(negx) -{ - TCGv z; - TCGv src; - TCGv addr; - int opsize; - - opsize = insn_opsize(insn); - SRC_EA(env, src, opsize, 1, &addr); - - gen_flush_flags(s); /* compute old Z */ - - /* Perform substract with borrow. - * (X, N) = -(src + X); - */ - - z = tcg_const_i32(0); - tcg_gen_add2_i32(QREG_CC_N, QREG_CC_X, src, z, QREG_CC_X, z); - tcg_gen_sub2_i32(QREG_CC_N, QREG_CC_X, z, z, QREG_CC_N, QREG_CC_X); - tcg_temp_free(z); - gen_ext(QREG_CC_N, QREG_CC_N, opsize, 1); - - tcg_gen_andi_i32(QREG_CC_X, QREG_CC_X, 1); - - /* Compute signed-overflow for negation. The normal formula for - * subtraction is (res ^ src) & (src ^ dest), but with dest==0 - * this simplies to res & src. - */ - - tcg_gen_and_i32(QREG_CC_V, QREG_CC_N, src); - - /* Copy the rest of the results into place. */ - tcg_gen_or_i32(QREG_CC_Z, QREG_CC_Z, QREG_CC_N); /* !Z is sticky */ - tcg_gen_mov_i32(QREG_CC_C, QREG_CC_X); - - set_cc_op(s, CC_OP_FLAGS); - - /* result is in QREG_CC_N */ - - DEST_EA(env, insn, opsize, QREG_CC_N, &addr); -} - -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; - - opsize = insn_opsize(insn); - DEST_EA(env, insn, opsize, tcg_const_i32(0), NULL); - gen_logic_cc(s, tcg_const_i32(0), opsize); -} - -static TCGv gen_get_ccr(DisasContext *s) -{ - TCGv dest; - - gen_flush_flags(s); - update_cc_op(s); - dest = tcg_temp_new(); - gen_helper_get_ccr(dest, cpu_env); - return dest; -} - -DISAS_INSN(move_from_ccr) -{ - TCGv ccr; - - ccr = gen_get_ccr(s); - DEST_EA(env, insn, OS_WORD, ccr, NULL); -} - -DISAS_INSN(neg) -{ - TCGv src1; - TCGv dest; - TCGv addr; - int opsize; - - opsize = insn_opsize(insn); - SRC_EA(env, src1, opsize, 1, &addr); - dest = tcg_temp_new(); - tcg_gen_neg_i32(dest, src1); - set_cc_op(s, CC_OP_SUBB + opsize); - gen_update_cc_add(dest, src1, opsize); - tcg_gen_setcondi_i32(TCG_COND_NE, QREG_CC_X, dest, 0); - DEST_EA(env, insn, opsize, dest, &addr); - tcg_temp_free(dest); -} - -static void gen_set_sr_im(DisasContext *s, uint16_t val, int ccr_only) -{ - if (ccr_only) { - tcg_gen_movi_i32(QREG_CC_C, val & CCF_C ? 1 : 0); - tcg_gen_movi_i32(QREG_CC_V, val & CCF_V ? -1 : 0); - tcg_gen_movi_i32(QREG_CC_Z, val & CCF_Z ? 0 : 1); - tcg_gen_movi_i32(QREG_CC_N, val & CCF_N ? -1 : 0); - tcg_gen_movi_i32(QREG_CC_X, val & CCF_X ? 1 : 0); - } else { - gen_helper_set_sr(cpu_env, tcg_const_i32(val)); - } - set_cc_op(s, CC_OP_FLAGS); -} - -static void gen_set_sr(CPUM68KState *env, DisasContext *s, uint16_t insn, - int ccr_only) -{ - if ((insn & 0x38) == 0) { - if (ccr_only) { - gen_helper_set_ccr(cpu_env, DREG(insn, 0)); - } else { - gen_helper_set_sr(cpu_env, DREG(insn, 0)); - } - set_cc_op(s, CC_OP_FLAGS); - } else if ((insn & 0x3f) == 0x3c) { - uint16_t val; - val = read_im16(env, s); - 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 src1; - TCGv dest; - TCGv addr; - int opsize; - - opsize = insn_opsize(insn); - SRC_EA(env, src1, opsize, 1, &addr); - dest = tcg_temp_new(); - tcg_gen_not_i32(dest, src1); - DEST_EA(env, insn, opsize, dest, &addr); - gen_logic_cc(s, dest, opsize); -} - -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, OS_LONG); -} - -DISAS_INSN(bkpt) -{ - gen_exception(s, s->pc - 2, EXCP_DEBUG); -} - -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, OS_LONG); -} - -DISAS_INSN(tst) -{ - int opsize; - TCGv tmp; - - opsize = insn_opsize(insn); - SRC_EA(env, tmp, opsize, 1, NULL); - gen_logic_cc(s, tmp, opsize); -} - -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, OS_BYTE); - 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 = read_im16(env, s); - 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, OS_LONG); -} - -static void gen_link(DisasContext *s, uint16_t insn, int32_t offset) -{ - TCGv reg; - TCGv tmp; - - 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); - tcg_temp_free(tmp); -} - -DISAS_INSN(link) -{ - int16_t offset; - - offset = read_im16(env, s); - gen_link(s, insn, offset); -} - -DISAS_INSN(linkl) -{ - int32_t offset; - - offset = read_im32(env, s); - gen_link(s, insn, 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 src; - TCGv dest; - TCGv val; - int imm; - TCGv addr; - int opsize; - - if ((insn & 070) == 010) { - /* Operation on address register is always long. */ - opsize = OS_LONG; - } else { - opsize = insn_opsize(insn); - } - SRC_EA(env, src, opsize, 1, &addr); - imm = (insn >> 9) & 7; - if (imm == 0) { - imm = 8; - } - val = tcg_const_i32(imm); - dest = tcg_temp_new(); - tcg_gen_mov_i32(dest, src); - if ((insn & 0x38) == 0x08) { - /* Don't update condition codes if the destination is an - address register. */ - if (insn & 0x0100) { - tcg_gen_sub_i32(dest, dest, val); - } else { - tcg_gen_add_i32(dest, dest, val); - } - } else { - if (insn & 0x0100) { - tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, dest, val); - tcg_gen_sub_i32(dest, dest, val); - set_cc_op(s, CC_OP_SUBB + opsize); - } else { - tcg_gen_add_i32(dest, dest, val); - tcg_gen_setcond_i32(TCG_COND_LTU, QREG_CC_X, dest, val); - set_cc_op(s, CC_OP_ADDB + opsize); - } - gen_update_cc_add(dest, val, opsize); - } - DEST_EA(env, insn, opsize, 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 = (int16_t)read_im16(env, s); - } else if (offset == -1) { - offset = read_im32(env, s); - } - if (op == 1) { - /* bsr */ - gen_push(s, tcg_const_i32(s->pc)); - } - 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), OS_LONG); -} - -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, opsize); -} - -DISAS_INSN(or) -{ - TCGv reg; - TCGv dest; - TCGv src; - TCGv addr; - int opsize; - - opsize = insn_opsize(insn); - reg = gen_extend(DREG(insn, 9), opsize, 0); - dest = tcg_temp_new(); - if (insn & 0x100) { - SRC_EA(env, src, opsize, 0, &addr); - tcg_gen_or_i32(dest, src, reg); - DEST_EA(env, insn, opsize, dest, &addr); - } else { - SRC_EA(env, src, opsize, 0, NULL); - tcg_gen_or_i32(dest, src, reg); - gen_partset_reg(opsize, DREG(insn, 9), dest); - } - gen_logic_cc(s, dest, opsize); -} - -DISAS_INSN(suba) -{ - TCGv src; - TCGv reg; - - SRC_EA(env, src, (insn & 0x100) ? OS_LONG : OS_WORD, 1, NULL); - reg = AREG(insn, 9); - tcg_gen_sub_i32(reg, reg, src); -} - -static inline void gen_subx(DisasContext *s, TCGv src, TCGv dest, int opsize) -{ - TCGv tmp; - - gen_flush_flags(s); /* compute old Z */ - - /* Perform substract with borrow. - * (X, N) = dest - (src + X); - */ - - tmp = tcg_const_i32(0); - tcg_gen_add2_i32(QREG_CC_N, QREG_CC_X, src, tmp, QREG_CC_X, tmp); - tcg_gen_sub2_i32(QREG_CC_N, QREG_CC_X, dest, tmp, QREG_CC_N, QREG_CC_X); - gen_ext(QREG_CC_N, QREG_CC_N, opsize, 1); - tcg_gen_andi_i32(QREG_CC_X, QREG_CC_X, 1); - - /* Compute signed-overflow for substract. */ - - tcg_gen_xor_i32(QREG_CC_V, QREG_CC_N, dest); - tcg_gen_xor_i32(tmp, dest, src); - tcg_gen_and_i32(QREG_CC_V, QREG_CC_V, tmp); - tcg_temp_free(tmp); - - /* Copy the rest of the results into place. */ - tcg_gen_or_i32(QREG_CC_Z, QREG_CC_Z, QREG_CC_N); /* !Z is sticky */ - tcg_gen_mov_i32(QREG_CC_C, QREG_CC_X); - - set_cc_op(s, CC_OP_FLAGS); - - /* result is in QREG_CC_N */ -} - -DISAS_INSN(subx_reg) -{ - TCGv dest; - TCGv src; - int opsize; - - opsize = insn_opsize(insn); - - src = gen_extend(DREG(insn, 0), opsize, 1); - dest = gen_extend(DREG(insn, 9), opsize, 1); - - gen_subx(s, src, dest, opsize); - - gen_partset_reg(opsize, DREG(insn, 9), QREG_CC_N); -} - -DISAS_INSN(subx_mem) -{ - TCGv src; - TCGv addr_src; - TCGv dest; - TCGv addr_dest; - int opsize; - - opsize = insn_opsize(insn); - - addr_src = AREG(insn, 0); - tcg_gen_subi_i32(addr_src, addr_src, opsize); - src = gen_load(s, opsize, addr_src, 1); - - addr_dest = AREG(insn, 9); - tcg_gen_subi_i32(addr_dest, addr_dest, opsize); - dest = gen_load(s, opsize, addr_dest, 1); - - gen_subx(s, src, dest, opsize); - - gen_store(s, opsize, addr_dest, QREG_CC_N); -} - -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, OS_LONG); - DEST_EA(env, insn, OS_LONG, src, NULL); -} - -DISAS_INSN(cmp) -{ - TCGv src; - TCGv reg; - int opsize; - - opsize = insn_opsize(insn); - SRC_EA(env, src, opsize, 1, NULL); - reg = gen_extend(DREG(insn, 9), opsize, 1); - gen_update_cc_cmp(s, reg, src, opsize); -} - -DISAS_INSN(cmpa) -{ - int opsize; - TCGv src; - TCGv reg; - - if (insn & 0x100) { - opsize = OS_LONG; - } else { - opsize = OS_WORD; - } - SRC_EA(env, src, opsize, 1, NULL); - reg = AREG(insn, 9); - gen_update_cc_cmp(s, reg, src, OS_LONG); -} - -DISAS_INSN(eor) -{ - TCGv src; - TCGv dest; - TCGv addr; - int opsize; - - opsize = insn_opsize(insn); - - SRC_EA(env, src, opsize, 0, &addr); - dest = tcg_temp_new(); - tcg_gen_xor_i32(dest, src, DREG(insn, 9)); - gen_logic_cc(s, dest, opsize); - DEST_EA(env, insn, opsize, dest, &addr); -} - -static void do_exg(TCGv reg1, TCGv reg2) -{ - TCGv temp = tcg_temp_new(); - tcg_gen_mov_i32(temp, reg1); - tcg_gen_mov_i32(reg1, reg2); - tcg_gen_mov_i32(reg2, temp); - tcg_temp_free(temp); -} - -DISAS_INSN(exg_dd) -{ - /* exchange Dx and Dy */ - do_exg(DREG(insn, 9), DREG(insn, 0)); -} - -DISAS_INSN(exg_aa) -{ - /* exchange Ax and Ay */ - do_exg(AREG(insn, 9), AREG(insn, 0)); -} - -DISAS_INSN(exg_da) -{ - /* exchange Dx and Ay */ - do_exg(DREG(insn, 9), AREG(insn, 0)); -} - -DISAS_INSN(and) -{ - TCGv src; - TCGv reg; - TCGv dest; - TCGv addr; - int opsize; - - dest = tcg_temp_new(); - - opsize = insn_opsize(insn); - reg = DREG(insn, 9); - if (insn & 0x100) { - SRC_EA(env, src, opsize, 0, &addr); - tcg_gen_and_i32(dest, src, reg); - DEST_EA(env, insn, opsize, dest, &addr); - } else { - SRC_EA(env, src, opsize, 0, NULL); - tcg_gen_and_i32(dest, src, reg); - gen_partset_reg(opsize, reg, dest); - } - tcg_temp_free(dest); - gen_logic_cc(s, dest, opsize); -} - -DISAS_INSN(adda) -{ - TCGv src; - TCGv reg; - - SRC_EA(env, src, (insn & 0x100) ? OS_LONG : OS_WORD, 1, NULL); - reg = AREG(insn, 9); - tcg_gen_add_i32(reg, reg, src); -} - -static inline void gen_addx(DisasContext *s, TCGv src, TCGv dest, int opsize) -{ - TCGv tmp; - - gen_flush_flags(s); /* compute old Z */ - - /* Perform addition with carry. - * (X, N) = src + dest + X; - */ - - tmp = tcg_const_i32(0); - tcg_gen_add2_i32(QREG_CC_N, QREG_CC_X, QREG_CC_X, tmp, dest, tmp); - tcg_gen_add2_i32(QREG_CC_N, QREG_CC_X, QREG_CC_N, QREG_CC_X, src, tmp); - gen_ext(QREG_CC_N, QREG_CC_N, opsize, 1); - - /* Compute signed-overflow for addition. */ - - tcg_gen_xor_i32(QREG_CC_V, QREG_CC_N, src); - tcg_gen_xor_i32(tmp, dest, src); - tcg_gen_andc_i32(QREG_CC_V, QREG_CC_V, tmp); - tcg_temp_free(tmp); - - /* Copy the rest of the results into place. */ - tcg_gen_or_i32(QREG_CC_Z, QREG_CC_Z, QREG_CC_N); /* !Z is sticky */ - tcg_gen_mov_i32(QREG_CC_C, QREG_CC_X); - - set_cc_op(s, CC_OP_FLAGS); - - /* result is in QREG_CC_N */ -} - -DISAS_INSN(addx_reg) -{ - TCGv dest; - TCGv src; - int opsize; - - opsize = insn_opsize(insn); - - dest = gen_extend(DREG(insn, 9), opsize, 1); - src = gen_extend(DREG(insn, 0), opsize, 1); - - gen_addx(s, src, dest, opsize); - - gen_partset_reg(opsize, DREG(insn, 9), QREG_CC_N); -} - -DISAS_INSN(addx_mem) -{ - TCGv src; - TCGv addr_src; - TCGv dest; - TCGv addr_dest; - int opsize; - - opsize = insn_opsize(insn); - - addr_src = AREG(insn, 0); - tcg_gen_subi_i32(addr_src, addr_src, opsize_bytes(opsize)); - src = gen_load(s, opsize, addr_src, 1); - - addr_dest = AREG(insn, 9); - tcg_gen_subi_i32(addr_dest, addr_dest, opsize_bytes(opsize)); - dest = gen_load(s, opsize, addr_dest, 1); - - gen_addx(s, src, dest, opsize); - - gen_store(s, opsize, addr_dest, QREG_CC_N); -} - -/* TODO: This could be implemented without helper functions. */ -DISAS_INSN(shift_im) -{ - TCGv reg; - int tmp; - TCGv shift; - - set_cc_op(s, CC_OP_FLAGS); - - 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); - } - } -} - -DISAS_INSN(shift_reg) -{ - TCGv reg; - TCGv shift; - - reg = DREG(insn, 0); - shift = DREG(insn, 9); - 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); - } - } - set_cc_op(s, CC_OP_FLAGS); -} - -DISAS_INSN(ff1) -{ - TCGv reg; - reg = DREG(insn, 0); - gen_logic_cc(s, reg, OS_LONG); - 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 = read_im16(env, s); - if (ext != 0x46FC) { - gen_exception(s, addr, EXCP_UNSUPPORTED); - return; - } - ext = read_im16(env, s); - 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 sr; - - if (IS_USER(s) && !m68k_feature(env, M68K_FEATURE_M68000)) { - gen_exception(s, s->pc - 2, EXCP_PRIVILEGE); - return; - } - sr = gen_get_sr(s); - DEST_EA(env, insn, OS_WORD, sr, NULL); -} - -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 = read_im16(env, s); - - 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 = read_im16(env, s); - - 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 = read_im16(env, s); - 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) | read_im16(env, s); - } - - 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 = read_im16(env, s); - - 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_extrl_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) -{ - TCGv tmp = tcg_temp_new(); - tcg_gen_andi_i32(tmp, QREG_MACSR, 0xf); - gen_helper_set_sr(cpu_env, tmp); - tcg_temp_free(tmp); - set_cc_op(s, 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) -{ - /* Build the opcode table only once to avoid - multithreading issues. */ - if (opcode_table[0] != NULL) { - return; - } - - /* use BASE() for instruction available - * for CF_ISA_A and M68000. - */ -#define BASE(name, opcode, mask) \ - register_opcode(disas_##name, 0x##opcode, 0x##mask) -#define INSN(name, opcode, mask, feature) do { \ - if (m68k_feature(env, M68K_FEATURE_##feature)) \ - BASE(name, opcode, mask); \ - } while(0) - BASE(undef, 0000, 0000); - INSN(arith_im, 0080, fff8, CF_ISA_A); - INSN(arith_im, 0000, ff00, M68000); - INSN(undef, 00c0, ffc0, M68000); - INSN(bitrev, 00c0, fff8, CF_ISA_APLUSC); - BASE(bitop_reg, 0100, f1c0); - BASE(bitop_reg, 0140, f1c0); - BASE(bitop_reg, 0180, f1c0); - BASE(bitop_reg, 01c0, f1c0); - INSN(arith_im, 0280, fff8, CF_ISA_A); - INSN(arith_im, 0200, ff00, M68000); - INSN(undef, 02c0, ffc0, M68000); - INSN(byterev, 02c0, fff8, CF_ISA_APLUSC); - INSN(arith_im, 0480, fff8, CF_ISA_A); - INSN(arith_im, 0400, ff00, M68000); - INSN(undef, 04c0, ffc0, M68000); - INSN(arith_im, 0600, ff00, M68000); - INSN(undef, 06c0, ffc0, M68000); - INSN(ff1, 04c0, fff8, CF_ISA_APLUSC); - INSN(arith_im, 0680, fff8, CF_ISA_A); - INSN(arith_im, 0c00, ff38, CF_ISA_A); - INSN(arith_im, 0c00, ff00, M68000); - BASE(bitop_im, 0800, ffc0); - BASE(bitop_im, 0840, ffc0); - BASE(bitop_im, 0880, ffc0); - BASE(bitop_im, 08c0, ffc0); - INSN(arith_im, 0a80, fff8, CF_ISA_A); - INSN(arith_im, 0a00, ff00, M68000); - BASE(move, 1000, f000); - BASE(move, 2000, f000); - BASE(move, 3000, f000); - INSN(strldsr, 40e7, ffff, CF_ISA_APLUSC); - INSN(negx, 4080, fff8, CF_ISA_A); - INSN(negx, 4000, ff00, M68000); - INSN(undef, 40c0, ffc0, M68000); - INSN(move_from_sr, 40c0, fff8, CF_ISA_A); - INSN(move_from_sr, 40c0, ffc0, M68000); - BASE(lea, 41c0, f1c0); - BASE(clr, 4200, ff00); - BASE(undef, 42c0, ffc0); - INSN(move_from_ccr, 42c0, fff8, CF_ISA_A); - INSN(move_from_ccr, 42c0, ffc0, M68000); - INSN(neg, 4480, fff8, CF_ISA_A); - INSN(neg, 4400, ff00, M68000); - INSN(undef, 44c0, ffc0, M68000); - BASE(move_to_ccr, 44c0, ffc0); - INSN(not, 4680, fff8, CF_ISA_A); - INSN(not, 4600, ff00, M68000); - INSN(undef, 46c0, ffc0, M68000); - INSN(move_to_sr, 46c0, ffc0, CF_ISA_A); - INSN(linkl, 4808, fff8, M68000); - BASE(pea, 4840, ffc0); - BASE(swap, 4840, fff8); - INSN(bkpt, 4848, fff8, BKPT); - BASE(movem, 48c0, fbc0); - BASE(ext, 4880, fff8); - BASE(ext, 48c0, fff8); - BASE(ext, 49c0, fff8); - BASE(tst, 4a00, ff00); - INSN(tas, 4ac0, ffc0, CF_ISA_B); - INSN(tas, 4ac0, ffc0, M68000); - INSN(halt, 4ac8, ffff, CF_ISA_A); - INSN(pulse, 4acc, ffff, CF_ISA_A); - BASE(illegal, 4afc, ffff); - INSN(mull, 4c00, ffc0, CF_ISA_A); - INSN(mull, 4c00, ffc0, LONG_MULDIV); - INSN(divl, 4c40, ffc0, CF_ISA_A); - INSN(divl, 4c40, ffc0, LONG_MULDIV); - INSN(sats, 4c80, fff8, CF_ISA_B); - BASE(trap, 4e40, fff0); - BASE(link, 4e50, fff8); - BASE(unlk, 4e58, fff8); - INSN(move_to_usp, 4e60, fff8, USP); - INSN(move_from_usp, 4e68, fff8, USP); - BASE(nop, 4e71, ffff); - BASE(stop, 4e72, ffff); - BASE(rte, 4e73, ffff); - BASE(rts, 4e75, ffff); - INSN(movec, 4e7b, ffff, CF_ISA_A); - BASE(jump, 4e80, ffc0); - BASE(jump, 4ec0, ffc0); - INSN(addsubq, 5000, f080, M68000); - BASE(addsubq, 5080, f0c0); - INSN(scc, 50c0, f0f8, CF_ISA_A); /* Scc.B Dx */ - INSN(scc, 50c0, f0c0, M68000); /* Scc.B <EA> */ - INSN(dbcc, 50c8, f0f8, M68000); - INSN(tpf, 51f8, fff8, CF_ISA_A); - - /* Branch instructions. */ - BASE(branch, 6000, f000); - /* Disable long branch instructions, then add back the ones we want. */ - BASE(undef, 60ff, f0ff); /* 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(branch, 60ff, f0ff, BCCL); - - BASE(moveq, 7000, f100); - INSN(mvzs, 7100, f100, CF_ISA_B); - BASE(or, 8000, f000); - BASE(divw, 80c0, f0c0); - BASE(addsub, 9000, f000); - INSN(undef, 90c0, f0c0, CF_ISA_A); - INSN(subx_reg, 9180, f1f8, CF_ISA_A); - INSN(subx_reg, 9100, f138, M68000); - INSN(subx_mem, 9108, f138, M68000); - INSN(suba, 91c0, f1c0, CF_ISA_A); - INSN(suba, 90c0, f0c0, M68000); - - BASE(undef_mac, a000, f000); - 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(cmp, b000, f100, M68000); - INSN(eor, b100, f100, M68000); - INSN(cmpa, b0c0, f0c0, M68000); - INSN(eor, b180, f1c0, CF_ISA_A); - BASE(and, c000, f000); - INSN(exg_dd, c140, f1f8, M68000); - INSN(exg_aa, c148, f1f8, M68000); - INSN(exg_da, c188, f1f8, M68000); - BASE(mulw, c0c0, f0c0); - BASE(addsub, d000, f000); - INSN(undef, d0c0, f0c0, CF_ISA_A); - INSN(addx_reg, d180, f1f8, CF_ISA_A); - INSN(addx_reg, d100, f138, M68000); - INSN(addx_mem, d108, f138, M68000); - INSN(adda, d1c0, f1c0, CF_ISA_A); - INSN(adda, d0c0, f0c0, M68000); - 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; - - insn = read_im16(env, s); - - opcode_table[insn](env, s, insn); -} - -/* generate intermediate code for basic block 'tb'. */ -void gen_intermediate_code(CPUM68KState *env, TranslationBlock *tb) -{ - M68kCPU *cpu = m68k_env_get_cpu(env); - CPUState *cs = CPU(cpu); - DisasContext dc1, *dc = &dc1; - 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->cc_op_synced = 1; - dc->singlestep_enabled = cs->singlestep_enabled; - dc->fpcr = env->fpcr; - dc->user = (env->sr & SR_S) == 0; - dc->done_mac = 0; - num_insns = 0; - max_insns = tb->cflags & CF_COUNT_MASK; - if (max_insns == 0) { - max_insns = CF_COUNT_MASK; - } - if (max_insns > TCG_MAX_INSNS) { - max_insns = TCG_MAX_INSNS; - } - - gen_tb_start(tb); - do { - pc_offset = dc->pc - pc_start; - gen_throws_exception = NULL; - tcg_gen_insn_start(dc->pc, dc->cc_op); - num_insns++; - - if (unlikely(cpu_breakpoint_test(cs, dc->pc, BP_ANY))) { - gen_exception(dc, dc->pc, EXCP_DEBUG); - dc->is_jmp = DISAS_JUMP; - /* The address covered by the breakpoint must be included in - [tb->pc, tb->pc + tb->size) in order to for it to be - properly cleared -- thus we increment the PC here so that - the logic setting tb->size below does the right thing. */ - dc->pc += 2; - break; - } - - if (num_insns == max_insns && (tb->cflags & CF_LAST_IO)) { - gen_io_start(); - } - - dc->insn_pc = dc->pc; - disas_m68k_insn(env, dc); - } 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) { - update_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: - update_cc_op(dc); - gen_jmp_tb(dc, 0, dc->pc); - break; - default: - case DISAS_JUMP: - case DISAS_UPDATE: - update_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_in_addr_range(pc_start)) { - qemu_log_lock(); - 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"); - qemu_log_unlock(); - } -#endif - tb->size = dc->pc - pc_start; - tb->icount = num_insns; -} - -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_m68k_get_ccr(env); - cpu_fprintf(f, "SR = %04x %c%c%c%c%c ", sr, (sr & CCF_X) ? '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, - target_ulong *data) -{ - int cc_op = data[1]; - env->pc = data[0]; - if (cc_op != CC_OP_DYNAMIC) { - env->cc_op = cc_op; - } -} |