static void gen_goto_tb(DisasContext *dc, int n, target_ulong dest)
{
if (use_goto_tb(dc, dest)) {
tcg_gen_goto_tb(n);
tcg_gen_movi_tl(cpu_pc, dest);
tcg_gen_exit_tb((uintptr_t)dc->tb + n);
} else {
tcg_gen_movi_tl(cpu_pc, dest);
if (dc->singlestep_enabled) {
t_gen_raise_exception(dc, EXCP_DEBUG);
}
tcg_gen_exit_tb(0);
}
}
static unsigned int dec10_setclrf(DisasContext *dc)
{
uint32_t flags;
unsigned int set = ~dc->opcode & 1;
flags = EXTRACT_FIELD(dc->ir, 0, 3)
| (EXTRACT_FIELD(dc->ir, 12, 15) << 4);
LOG_DIS("%s set=%d flags=%x\n", __func__, set, flags);
if (flags & X_FLAG) {
dc->flagx_known = 1;
if (set)
dc->flags_x = X_FLAG;
else
dc->flags_x = 0;
}
cris_evaluate_flags (dc);
cris_update_cc_op(dc, CC_OP_FLAGS, 4);
cris_update_cc_x(dc);
tcg_gen_movi_tl(cc_op, dc->cc_op);
if (set) {
tcg_gen_ori_tl(cpu_PR[PR_CCS], cpu_PR[PR_CCS], flags);
} else {
tcg_gen_andi_tl(cpu_PR[PR_CCS], cpu_PR[PR_CCS],
~(flags|F_FLAG_V10|P_FLAG_V10));
}
dc->flags_uptodate = 1;
dc->clear_x = 0;
cris_lock_irq(dc);
return 2;
}
static int dec10_prep_move_m(DisasContext *dc, int s_ext, int memsize,
TCGv dst)
{
unsigned int rs;
uint32_t imm;
int is_imm;
int insn_len = 0;
rs = dc->src;
is_imm = rs == 15 && !(dc->tb_flags & PFIX_FLAG);
LOG_DIS("rs=%d rd=%d is_imm=%d mode=%d pfix=%d\n",
rs, dc->dst, is_imm, dc->mode, dc->tb_flags & PFIX_FLAG);
/* Load [$rs] onto T1. */
if (is_imm) {
if (memsize != 4) {
if (s_ext) {
if (memsize == 1)
imm = ldsb_code(dc->pc + 2);
else
imm = ldsw_code(dc->pc + 2);
} else {
if (memsize == 1)
imm = ldub_code(dc->pc + 2);
else
imm = lduw_code(dc->pc + 2);
}
} else
imm = ldl_code(dc->pc + 2);
tcg_gen_movi_tl(dst, imm);
if (dc->mode == CRISV10_MODE_AUTOINC) {
insn_len += memsize;
if (memsize == 1)
insn_len++;
tcg_gen_addi_tl(cpu_R[15], cpu_R[15], insn_len);
}
} else {
TCGv addr;
addr = tcg_temp_new();
cris_flush_cc_state(dc);
crisv10_prepare_memaddr(dc, addr, memsize);
gen_load(dc, dst, addr, memsize, 0);
if (s_ext)
t_gen_sext(dst, dst, memsize);
else
t_gen_zext(dst, dst, memsize);
insn_len += crisv10_post_memaddr(dc, memsize);
tcg_temp_free(addr);
}
if (dc->mode == CRISV10_MODE_INDIRECT && (dc->tb_flags & PFIX_FLAG)) {
dc->dst = dc->src;
}
return insn_len;
}
static void gen_goto_tb(DisasContext *dc, int n, target_ulong dest)
{
TranslationBlock *tb;
tb = dc->tb;
if ((tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK) &&
likely(!dc->singlestep_enabled)) {
tcg_gen_goto_tb(n);
tcg_gen_movi_tl(cpu_pc, dest);
tcg_gen_exit_tb((uintptr_t)tb + n);
} else {
tcg_gen_movi_tl(cpu_pc, dest);
if (dc->singlestep_enabled) {
t_gen_raise_exception(dc, EXCP_DEBUG);
}
tcg_gen_exit_tb(0);
}
}
static void dec_call(DisasContext *dc)
{
LOG_DIS("call r%d\n", dc->r0);
tcg_gen_movi_tl(cpu_R[R_RA], dc->pc + 4);
tcg_gen_mov_tl(cpu_pc, cpu_R[dc->r0]);
dc->is_jmp = DISAS_JUMP;
}
static void dec_calli(DisasContext *dc)
{
LOG_DIS("calli %d\n", sign_extend(dc->imm26, 26) * 4);
tcg_gen_movi_tl(cpu_R[R_RA], dc->pc + 4);
gen_goto_tb(dc, 0, dc->pc + (sign_extend(dc->imm26 << 2, 26)));
dc->is_jmp = DISAS_TB_JUMP;
}
static bool trans_wfi(DisasContext *ctx, arg_wfi *a)
{
#ifndef CONFIG_USER_ONLY
tcg_gen_movi_tl(cpu_pc, ctx->pc_succ_insn);
gen_helper_wfi(cpu_env);
return true;
#else
return false;
#endif
}
static void dec_scall(DisasContext *dc)
{
switch (dc->imm5) {
case 2:
LOG_DIS("break\n");
tcg_gen_movi_tl(cpu_pc, dc->pc);
t_gen_raise_exception(dc, EXCP_BREAKPOINT);
break;
case 7:
LOG_DIS("scall\n");
tcg_gen_movi_tl(cpu_pc, dc->pc);
t_gen_raise_exception(dc, EXCP_SYSTEMCALL);
break;
default:
qemu_log_mask(LOG_GUEST_ERROR, "invalid opcode @0x%x", dc->pc);
t_gen_illegal_insn(dc);
break;
}
}
static void dec10_reg_scc(DisasContext *dc)
{
int cond = dc->dst;
LOG_DIS("s%s $r%u\n", cc_name(cond), dc->src);
if (cond != CC_A)
{
int l1;
gen_tst_cc (dc, cpu_R[dc->src], cond);
l1 = gen_new_label();
tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_R[dc->src], 0, l1);
tcg_gen_movi_tl(cpu_R[dc->src], 1);
gen_set_label(l1);
} else {
tcg_gen_movi_tl(cpu_R[dc->src], 1);
}
cris_cc_mask(dc, 0);
}
static bool trans_mret(DisasContext *ctx, arg_mret *a)
{
#ifndef CONFIG_USER_ONLY
tcg_gen_movi_tl(cpu_pc, ctx->base.pc_next);
gen_helper_mret(cpu_pc, cpu_env, cpu_pc);
tcg_gen_exit_tb(NULL, 0); /* no chaining */
ctx->base.is_jmp = DISAS_NORETURN;
return true;
#else
return false;
#endif
}
static unsigned int crisv10_decoder(DisasContext *dc)
{
unsigned int insn_len = 2;
if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP)))
tcg_gen_debug_insn_start(dc->pc);
/* Load a halfword onto the instruction register. */
dc->ir = lduw_code(dc->pc);
/* Now decode it. */
dc->opcode = EXTRACT_FIELD(dc->ir, 6, 9);
dc->mode = EXTRACT_FIELD(dc->ir, 10, 11);
dc->src = EXTRACT_FIELD(dc->ir, 0, 3);
dc->size = EXTRACT_FIELD(dc->ir, 4, 5);
dc->cond = dc->dst = EXTRACT_FIELD(dc->ir, 12, 15);
dc->postinc = EXTRACT_FIELD(dc->ir, 10, 10);
dc->clear_prefix = 1;
/* FIXME: What if this insn insn't 2 in length?? */
if (dc->src == 15 || dc->dst == 15)
tcg_gen_movi_tl(cpu_R[15], dc->pc + 2);
switch (dc->mode) {
case CRISV10_MODE_QIMMEDIATE:
insn_len = dec10_quick_imm(dc);
break;
case CRISV10_MODE_REG:
insn_len = dec10_reg(dc);
break;
case CRISV10_MODE_AUTOINC:
case CRISV10_MODE_INDIRECT:
insn_len = dec10_ind(dc);
break;
}
if (dc->clear_prefix && dc->tb_flags & PFIX_FLAG) {
dc->tb_flags &= ~PFIX_FLAG;
tcg_gen_andi_tl(cpu_PR[PR_CCS], cpu_PR[PR_CCS], ~PFIX_FLAG);
if (dc->tb_flags != dc->tb->flags) {
dc->cpustate_changed = 1;
}
}
/* CRISv10 locks out interrupts on dslots. */
if (dc->delayed_branch == 2) {
cris_lock_irq(dc);
}
return insn_len;
}
static void dec_nor(DisasContext *dc)
{
if (dc->format == OP_FMT_RI) {
LOG_DIS("nori r%d, r%d, %d\n", dc->r0, dc->r1,
zero_extend(dc->imm16, 16));
} else {
LOG_DIS("nor r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
}
if (dc->format == OP_FMT_RI) {
TCGv t0 = tcg_temp_new();
tcg_gen_movi_tl(t0, zero_extend(dc->imm16, 16));
tcg_gen_nor_tl(cpu_R[dc->r1], cpu_R[dc->r0], t0);
tcg_temp_free(t0);
} else {
tcg_gen_nor_tl(cpu_R[dc->r2], cpu_R[dc->r0], cpu_R[dc->r1]);
}
}
static void dec_modu(DisasContext *dc)
{
TCGLabel *l1;
LOG_DIS("modu r%d, r%d, %d\n", dc->r2, dc->r0, dc->r1);
if (!(dc->features & LM32_FEATURE_DIVIDE)) {
qemu_log_mask(LOG_GUEST_ERROR, "hardware divider is not available\n");
t_gen_illegal_insn(dc);
return;
}
l1 = gen_new_label();
tcg_gen_brcondi_tl(TCG_COND_NE, cpu_R[dc->r1], 0, l1);
tcg_gen_movi_tl(cpu_pc, dc->pc);
t_gen_raise_exception(dc, EXCP_DIVIDE_BY_ZERO);
gen_set_label(l1);
tcg_gen_remu_tl(cpu_R[dc->r2], cpu_R[dc->r0], cpu_R[dc->r1]);
}
static void dec_and(DisasContext *dc)
{
if (dc->format == OP_FMT_RI) {
LOG_DIS("andi r%d, r%d, %d\n", dc->r1, dc->r0,
zero_extend(dc->imm16, 16));
} else {
LOG_DIS("and r%d, r%d, r%d\n", dc->r2, dc->r0, dc->r1);
}
if (dc->format == OP_FMT_RI) {
tcg_gen_andi_tl(cpu_R[dc->r1], cpu_R[dc->r0],
zero_extend(dc->imm16, 16));
} else {
if (dc->r0 == 0 && dc->r1 == 0 && dc->r2 == 0) {
tcg_gen_movi_tl(cpu_pc, dc->pc + 4);
gen_helper_hlt(cpu_env);
} else {
tcg_gen_and_tl(cpu_R[dc->r2], cpu_R[dc->r0], cpu_R[dc->r1]);
}
}
}
static int dec10_dip(DisasContext *dc)
{
int insn_len = 2;
uint32_t imm;
LOG_DIS("dip pc=%x opcode=%d r%d r%d\n",
dc->pc, dc->opcode, dc->src, dc->dst);
if (dc->src == 15) {
imm = ldl_code(dc->pc + 2);
tcg_gen_movi_tl(cpu_PR[PR_PREFIX], imm);
if (dc->postinc)
insn_len += 4;
tcg_gen_addi_tl(cpu_R[15], cpu_R[15], insn_len - 2);
} else {
gen_load(dc, cpu_PR[PR_PREFIX], cpu_R[dc->src], 4, 0);
if (dc->postinc)
tcg_gen_addi_tl(cpu_R[dc->src], cpu_R[dc->src], 4);
}
cris_set_prefix(dc);
return insn_len;
}
static unsigned int dec10_ind(DisasContext *dc)
{
unsigned int insn_len = 2;
unsigned int size = dec10_size(dc->size);
uint32_t imm;
int32_t simm;
TCGv t[2];
if (dc->size != 3) {
switch (dc->opcode) {
case CRISV10_IND_MOVE_M_R:
return dec10_ind_move_m_r(dc, size);
break;
case CRISV10_IND_MOVE_R_M:
return dec10_ind_move_r_m(dc, size);
break;
case CRISV10_IND_CMP:
LOG_DIS("cmp size=%d op=%d %d\n", size, dc->src, dc->dst);
cris_cc_mask(dc, CC_MASK_NZVC);
insn_len += dec10_ind_alu(dc, CC_OP_CMP, size);
break;
case CRISV10_IND_TEST:
LOG_DIS("test size=%d op=%d %d\n", size, dc->src, dc->dst);
cris_evaluate_flags(dc);
cris_cc_mask(dc, CC_MASK_NZVC);
cris_alu_m_alloc_temps(t);
insn_len += dec10_prep_move_m(dc, 0, size, t[0]);
tcg_gen_andi_tl(cpu_PR[PR_CCS], cpu_PR[PR_CCS], ~3);
cris_alu(dc, CC_OP_CMP, cpu_R[dc->dst],
t[0], tcg_const_tl(0), size);
cris_alu_m_free_temps(t);
break;
case CRISV10_IND_ADD:
LOG_DIS("add size=%d op=%d %d\n", size, dc->src, dc->dst);
cris_cc_mask(dc, CC_MASK_NZVC);
insn_len += dec10_ind_alu(dc, CC_OP_ADD, size);
break;
case CRISV10_IND_SUB:
LOG_DIS("sub size=%d op=%d %d\n", size, dc->src, dc->dst);
cris_cc_mask(dc, CC_MASK_NZVC);
insn_len += dec10_ind_alu(dc, CC_OP_SUB, size);
break;
case CRISV10_IND_BOUND:
LOG_DIS("bound size=%d op=%d %d\n", size, dc->src, dc->dst);
cris_cc_mask(dc, CC_MASK_NZVC);
insn_len += dec10_ind_bound(dc, size);
break;
case CRISV10_IND_AND:
LOG_DIS("and size=%d op=%d %d\n", size, dc->src, dc->dst);
cris_cc_mask(dc, CC_MASK_NZVC);
insn_len += dec10_ind_alu(dc, CC_OP_AND, size);
break;
case CRISV10_IND_OR:
LOG_DIS("or size=%d op=%d %d\n", size, dc->src, dc->dst);
cris_cc_mask(dc, CC_MASK_NZVC);
insn_len += dec10_ind_alu(dc, CC_OP_OR, size);
break;
case CRISV10_IND_MOVX:
insn_len = dec10_alux_m(dc, CC_OP_MOVE);
break;
case CRISV10_IND_ADDX:
insn_len = dec10_alux_m(dc, CC_OP_ADD);
break;
case CRISV10_IND_SUBX:
insn_len = dec10_alux_m(dc, CC_OP_SUB);
break;
case CRISV10_IND_CMPX:
insn_len = dec10_alux_m(dc, CC_OP_CMP);
break;
case CRISV10_IND_MUL:
/* This is a reg insn coded in the mem indir space. */
LOG_DIS("mul pc=%x opcode=%d\n", dc->pc, dc->opcode);
cris_cc_mask(dc, CC_MASK_NZVC);
dec10_reg_mul(dc, size, dc->ir & (1 << 10));
break;
case CRISV10_IND_BDAP_M:
insn_len = dec10_bdap_m(dc, size);
break;
default:
LOG_DIS("pc=%x var-ind.%d %d r%d r%d\n",
dc->pc, size, dc->opcode, dc->src, dc->dst);
cpu_abort(dc->env, "Unhandled opcode");
break;
}
return insn_len;
}
switch (dc->opcode) {
case CRISV10_IND_MOVE_M_SPR:
insn_len = dec10_ind_move_m_pr(dc);
break;
case CRISV10_IND_MOVE_SPR_M:
insn_len = dec10_ind_move_pr_m(dc);
break;
case CRISV10_IND_JUMP_M:
if (dc->src == 15) {
LOG_DIS("jump.%d %d r%d r%d direct\n", size,
dc->opcode, dc->src, dc->dst);
imm = ldl_code(dc->pc + 2);
if (dc->mode == CRISV10_MODE_AUTOINC)
insn_len += size;
t_gen_mov_preg_TN(dc, dc->dst, tcg_const_tl(dc->pc + insn_len));
dc->jmp_pc = imm;
cris_prepare_jmp(dc, JMP_DIRECT);
dc->delayed_branch--; /* v10 has no dslot here. */
} else {
if (dc->dst == 14) {
LOG_DIS("break %d\n", dc->src);
cris_evaluate_flags(dc);
tcg_gen_movi_tl(env_pc, dc->pc + 2);
t_gen_raise_exception(EXCP_BREAK);
dc->is_jmp = DISAS_UPDATE;
return insn_len;
}
LOG_DIS("%d: jump.%d %d r%d r%d\n", __LINE__, size,
dc->opcode, dc->src, dc->dst);
t[0] = tcg_temp_new();
t_gen_mov_preg_TN(dc, dc->dst, tcg_const_tl(dc->pc + insn_len));
crisv10_prepare_memaddr(dc, t[0], size);
gen_load(dc, env_btarget, t[0], 4, 0);
insn_len += crisv10_post_memaddr(dc, size);
cris_prepare_jmp(dc, JMP_INDIRECT);
dc->delayed_branch--; /* v10 has no dslot here. */
tcg_temp_free(t[0]);
}
break;
case CRISV10_IND_MOVEM_R_M:
LOG_DIS("movem_r_m pc=%x opcode=%d r%d r%d\n",
dc->pc, dc->opcode, dc->dst, dc->src);
dec10_movem_r_m(dc);
break;
case CRISV10_IND_MOVEM_M_R:
LOG_DIS("movem_m_r pc=%x opcode=%d\n", dc->pc, dc->opcode);
dec10_movem_m_r(dc);
break;
case CRISV10_IND_JUMP_R:
LOG_DIS("jmp pc=%x opcode=%d r%d r%d\n",
dc->pc, dc->opcode, dc->dst, dc->src);
tcg_gen_mov_tl(env_btarget, cpu_R[dc->src]);
t_gen_mov_preg_TN(dc, dc->dst, tcg_const_tl(dc->pc + insn_len));
cris_prepare_jmp(dc, JMP_INDIRECT);
dc->delayed_branch--; /* v10 has no dslot here. */
break;
case CRISV10_IND_MOVX:
insn_len = dec10_alux_m(dc, CC_OP_MOVE);
break;
case CRISV10_IND_ADDX:
insn_len = dec10_alux_m(dc, CC_OP_ADD);
break;
case CRISV10_IND_SUBX:
insn_len = dec10_alux_m(dc, CC_OP_SUB);
break;
case CRISV10_IND_CMPX:
insn_len = dec10_alux_m(dc, CC_OP_CMP);
break;
case CRISV10_IND_DIP:
insn_len = dec10_dip(dc);
break;
case CRISV10_IND_BCC_M:
cris_cc_mask(dc, 0);
imm = ldsw_code(dc->pc + 2);
simm = (int16_t)imm;
simm += 4;
LOG_DIS("bcc_m: b%s %x\n", cc_name(dc->cond), dc->pc + simm);
cris_prepare_cc_branch(dc, simm, dc->cond);
insn_len = 4;
break;
default:
LOG_DIS("ERROR pc=%x opcode=%d\n", dc->pc, dc->opcode);
cpu_abort(dc->env, "Unhandled opcode");
break;
}
return insn_len;
}
static unsigned int dec10_quick_imm(DisasContext *dc)
{
int32_t imm, simm;
int op;
/* sign extend. */
imm = dc->ir & ((1 << 6) - 1);
simm = (int8_t) (imm << 2);
simm >>= 2;
switch (dc->opcode) {
case CRISV10_QIMM_BDAP_R0:
case CRISV10_QIMM_BDAP_R1:
case CRISV10_QIMM_BDAP_R2:
case CRISV10_QIMM_BDAP_R3:
simm = (int8_t)dc->ir;
LOG_DIS("bdap %d $r%d\n", simm, dc->dst);
LOG_DIS("pc=%x mode=%x quickimm %d r%d r%d\n",
dc->pc, dc->mode, dc->opcode, dc->src, dc->dst);
cris_set_prefix(dc);
if (dc->dst == 15) {
tcg_gen_movi_tl(cpu_PR[PR_PREFIX], dc->pc + 2 + simm);
} else {
tcg_gen_addi_tl(cpu_PR[PR_PREFIX], cpu_R[dc->dst], simm);
}
break;
case CRISV10_QIMM_MOVEQ:
LOG_DIS("moveq %d, $r%d\n", simm, dc->dst);
cris_cc_mask(dc, CC_MASK_NZVC);
cris_alu(dc, CC_OP_MOVE, cpu_R[dc->dst],
cpu_R[dc->dst], tcg_const_tl(simm), 4);
break;
case CRISV10_QIMM_CMPQ:
LOG_DIS("cmpq %d, $r%d\n", simm, dc->dst);
cris_cc_mask(dc, CC_MASK_NZVC);
cris_alu(dc, CC_OP_CMP, cpu_R[dc->dst],
cpu_R[dc->dst], tcg_const_tl(simm), 4);
break;
case CRISV10_QIMM_ADDQ:
LOG_DIS("addq %d, $r%d\n", imm, dc->dst);
cris_cc_mask(dc, CC_MASK_NZVC);
cris_alu(dc, CC_OP_ADD, cpu_R[dc->dst],
cpu_R[dc->dst], tcg_const_tl(imm), 4);
break;
case CRISV10_QIMM_ANDQ:
LOG_DIS("andq %d, $r%d\n", simm, dc->dst);
cris_cc_mask(dc, CC_MASK_NZVC);
cris_alu(dc, CC_OP_AND, cpu_R[dc->dst],
cpu_R[dc->dst], tcg_const_tl(simm), 4);
break;
case CRISV10_QIMM_ASHQ:
LOG_DIS("ashq %d, $r%d\n", simm, dc->dst);
cris_cc_mask(dc, CC_MASK_NZVC);
op = imm & (1 << 5);
imm &= 0x1f;
if (op) {
cris_alu(dc, CC_OP_ASR, cpu_R[dc->dst],
cpu_R[dc->dst], tcg_const_tl(imm), 4);
} else {
/* BTST */
cris_update_cc_op(dc, CC_OP_FLAGS, 4);
gen_helper_btst(cpu_PR[PR_CCS], cpu_R[dc->dst],
tcg_const_tl(imm), cpu_PR[PR_CCS]);
}
break;
case CRISV10_QIMM_LSHQ:
LOG_DIS("lshq %d, $r%d\n", simm, dc->dst);
op = CC_OP_LSL;
if (imm & (1 << 5)) {
op = CC_OP_LSR;
}
imm &= 0x1f;
cris_cc_mask(dc, CC_MASK_NZVC);
cris_alu(dc, op, cpu_R[dc->dst],
cpu_R[dc->dst], tcg_const_tl(imm), 4);
break;
case CRISV10_QIMM_SUBQ:
LOG_DIS("subq %d, $r%d\n", imm, dc->dst);
cris_cc_mask(dc, CC_MASK_NZVC);
cris_alu(dc, CC_OP_SUB, cpu_R[dc->dst],
cpu_R[dc->dst], tcg_const_tl(imm), 4);
break;
case CRISV10_QIMM_ORQ:
LOG_DIS("andq %d, $r%d\n", simm, dc->dst);
cris_cc_mask(dc, CC_MASK_NZVC);
cris_alu(dc, CC_OP_OR, cpu_R[dc->dst],
cpu_R[dc->dst], tcg_const_tl(simm), 4);
break;
case CRISV10_QIMM_BCC_R0:
case CRISV10_QIMM_BCC_R1:
case CRISV10_QIMM_BCC_R2:
case CRISV10_QIMM_BCC_R3:
imm = dc->ir & 0xff;
/* bit 0 is a sign bit. */
if (imm & 1) {
imm |= 0xffffff00; /* sign extend. */
imm &= ~1; /* get rid of the sign bit. */
}
imm += 2;
LOG_DIS("b%s %d\n", cc_name(dc->cond), imm);
cris_cc_mask(dc, 0);
cris_prepare_cc_branch(dc, imm, dc->cond);
break;
default:
LOG_DIS("pc=%x mode=%x quickimm %d r%d r%d\n",
dc->pc, dc->mode, dc->opcode, dc->src, dc->dst);
cpu_abort(dc->env, "Unhandled quickimm\n");
break;
}
return 2;
}
static inline void t_gen_illegal_insn(DisasContext *dc)
{
tcg_gen_movi_tl(cpu_pc, dc->pc);
gen_helper_ill(cpu_env);
}
static void dec_wcsr(DisasContext *dc)
{
int no;
LOG_DIS("wcsr r%d, %d\n", dc->r1, dc->csr);
switch (dc->csr) {
case CSR_IE:
tcg_gen_mov_tl(cpu_ie, cpu_R[dc->r1]);
tcg_gen_movi_tl(cpu_pc, dc->pc + 4);
dc->is_jmp = DISAS_UPDATE;
break;
case CSR_IM:
/* mark as an io operation because it could cause an interrupt */
if (dc->tb->cflags & CF_USE_ICOUNT) {
gen_io_start();
}
gen_helper_wcsr_im(cpu_env, cpu_R[dc->r1]);
tcg_gen_movi_tl(cpu_pc, dc->pc + 4);
if (dc->tb->cflags & CF_USE_ICOUNT) {
gen_io_end();
}
dc->is_jmp = DISAS_UPDATE;
break;
case CSR_IP:
/* mark as an io operation because it could cause an interrupt */
if (dc->tb->cflags & CF_USE_ICOUNT) {
gen_io_start();
}
gen_helper_wcsr_ip(cpu_env, cpu_R[dc->r1]);
tcg_gen_movi_tl(cpu_pc, dc->pc + 4);
if (dc->tb->cflags & CF_USE_ICOUNT) {
gen_io_end();
}
dc->is_jmp = DISAS_UPDATE;
break;
case CSR_ICC:
/* TODO */
break;
case CSR_DCC:
/* TODO */
break;
case CSR_EBA:
tcg_gen_mov_tl(cpu_eba, cpu_R[dc->r1]);
break;
case CSR_DEBA:
tcg_gen_mov_tl(cpu_deba, cpu_R[dc->r1]);
break;
case CSR_JTX:
gen_helper_wcsr_jtx(cpu_env, cpu_R[dc->r1]);
break;
case CSR_JRX:
gen_helper_wcsr_jrx(cpu_env, cpu_R[dc->r1]);
break;
case CSR_DC:
gen_helper_wcsr_dc(cpu_env, cpu_R[dc->r1]);
break;
case CSR_BP0:
case CSR_BP1:
case CSR_BP2:
case CSR_BP3:
no = dc->csr - CSR_BP0;
if (dc->num_breakpoints <= no) {
qemu_log_mask(LOG_GUEST_ERROR,
"breakpoint #%i is not available\n", no);
t_gen_illegal_insn(dc);
break;
}
gen_helper_wcsr_bp(cpu_env, cpu_R[dc->r1], tcg_const_i32(no));
break;
case CSR_WP0:
case CSR_WP1:
case CSR_WP2:
case CSR_WP3:
no = dc->csr - CSR_WP0;
if (dc->num_watchpoints <= no) {
qemu_log_mask(LOG_GUEST_ERROR,
"watchpoint #%i is not available\n", no);
t_gen_illegal_insn(dc);
break;
}
gen_helper_wcsr_wp(cpu_env, cpu_R[dc->r1], tcg_const_i32(no));
break;
case CSR_CC:
case CSR_CFG:
qemu_log_mask(LOG_GUEST_ERROR, "invalid write access csr=%x\n",
dc->csr);
break;
default:
qemu_log_mask(LOG_GUEST_ERROR, "write_csr: unknown csr=%x\n",
dc->csr);
break;
}
}
/* generate intermediate code for basic block 'tb'. */
static void gen_intermediate_code_internal(
CPUNios2State *env, TranslationBlock *tb, int search_pc)
{
DisasContext dc1, *dc = &dc1;
int num_insns;
int max_insns;
uint32_t next_page_start;
int j, lj = -1;
uint16_t *gen_opc_end = gen_opc_buf + OPC_MAX_SIZE;
/* Initialize DC */
dc->env = env;
dc->cpu_R = cpu_R;
dc->is_jmp = DISAS_NEXT;
dc->pc = tb->pc;
dc->tb = tb;
/* Dump the CPU state to the log */
if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
qemu_log("--------------\n");
log_cpu_state(env, 0);
}
/* Set up instruction counts */
num_insns = 0;
max_insns = tb->cflags & CF_COUNT_MASK;
if (max_insns == 0) {
max_insns = CF_COUNT_MASK;
}
next_page_start = (tb->pc & TARGET_PAGE_MASK) + TARGET_PAGE_SIZE;
gen_icount_start();
do {
/* Mark instruction start with associated PC */
if (search_pc) {
j = gen_opc_ptr - gen_opc_buf;
if (lj < j) {
lj++;
while (lj < j) {
gen_opc_instr_start[lj++] = 0;
}
}
gen_opc_pc[lj] = dc->pc;
gen_opc_instr_start[lj] = 1;
gen_opc_icount[lj] = num_insns;
}
LOG_DIS("%8.8x:\t", dc->pc);
if (num_insns + 1 == max_insns && (tb->cflags & CF_LAST_IO)) {
gen_io_start();
}
/* Decode an instruction */
handle_instruction(dc);
dc->pc += 4;
num_insns++;
/* Translation stops when a conditional branch is encountered.
* Otherwise the subsequent code could get translated several times.
* Also stop translation when a page boundary is reached. This
* ensures prefetch aborts occur at the right place. */
} while (!dc->is_jmp && gen_opc_ptr < gen_opc_end &&
!env->singlestep_enabled &&
!singlestep &&
dc->pc < next_page_start &&
num_insns < max_insns);
if (tb->cflags & CF_LAST_IO) {
gen_io_end();
}
/* Indicate where the next block should start */
switch (dc->is_jmp) {
case DISAS_NEXT:
/* Save the current PC back into the CPU register */
tcg_gen_movi_tl(cpu_R[R_PC], dc->pc);
tcg_gen_exit_tb(0);
break;
default:
case DISAS_JUMP:
case DISAS_UPDATE:
/* The jump will already have updated the PC register */
tcg_gen_exit_tb(0);
break;
case DISAS_TB_JUMP:
/* nothing more to generate */
break;
}
/* End off the block */
gen_icount_end(tb, num_insns);
*gen_opc_ptr = INDEX_op_end;
/* Mark instruction starts for the final generated instruction */
if (search_pc) {
j = gen_opc_ptr - gen_opc_buf;
lj++;
while (lj <= j) {
gen_opc_instr_start[lj++] = 0;
}
} else {
tb->size = dc->pc - tb->pc;
tb->icount = num_insns;
}
#ifdef DEBUG_DISAS
if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
qemu_log("----------------\n");
qemu_log("IN: %s\n", lookup_symbol(tb->pc));
log_target_disas(tb->pc, dc->pc - tb->pc, 0);
qemu_log("\nisize=%d osize=%td\n",
dc->pc - tb->pc, gen_opc_ptr - gen_opc_buf);
}
#endif
}
/* generate intermediate code for basic block 'tb'. */
void gen_intermediate_code(CPULM32State *env, struct TranslationBlock *tb)
{
LM32CPU *cpu = lm32_env_get_cpu(env);
CPUState *cs = CPU(cpu);
struct DisasContext ctx, *dc = &ctx;
uint32_t pc_start;
uint32_t next_page_start;
int num_insns;
int max_insns;
pc_start = tb->pc;
dc->features = cpu->features;
dc->num_breakpoints = cpu->num_breakpoints;
dc->num_watchpoints = cpu->num_watchpoints;
dc->tb = tb;
dc->is_jmp = DISAS_NEXT;
dc->pc = pc_start;
dc->singlestep_enabled = cs->singlestep_enabled;
if (pc_start & 3) {
qemu_log_mask(LOG_GUEST_ERROR,
"unaligned PC=%x. Ignoring lowest bits.\n", pc_start);
pc_start &= ~3;
}
next_page_start = (pc_start & TARGET_PAGE_MASK) + TARGET_PAGE_SIZE;
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 {
tcg_gen_insn_start(dc->pc);
num_insns++;
if (unlikely(cpu_breakpoint_test(cs, dc->pc, BP_ANY))) {
tcg_gen_movi_tl(cpu_pc, dc->pc);
t_gen_raise_exception(dc, EXCP_DEBUG);
dc->is_jmp = DISAS_UPDATE;
/* 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 += 4;
break;
}
/* Pretty disas. */
LOG_DIS("%8.8x:\t", dc->pc);
if (num_insns == max_insns && (tb->cflags & CF_LAST_IO)) {
gen_io_start();
}
decode(dc, cpu_ldl_code(env, dc->pc));
dc->pc += 4;
} while (!dc->is_jmp
&& !tcg_op_buf_full()
&& !cs->singlestep_enabled
&& !singlestep
&& (dc->pc < next_page_start)
&& num_insns < max_insns);
if (tb->cflags & CF_LAST_IO) {
gen_io_end();
}
if (unlikely(cs->singlestep_enabled)) {
if (dc->is_jmp == DISAS_NEXT) {
tcg_gen_movi_tl(cpu_pc, dc->pc);
}
t_gen_raise_exception(dc, EXCP_DEBUG);
} else {
switch (dc->is_jmp) {
case DISAS_NEXT:
gen_goto_tb(dc, 1, dc->pc);
break;
default:
case DISAS_JUMP:
case DISAS_UPDATE:
/* 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);
tb->size = dc->pc - pc_start;
tb->icount = num_insns;
#ifdef DEBUG_DISAS
if (qemu_loglevel_mask(CPU_LOG_TB_IN_ASM)) {
qemu_log("\n");
log_target_disas(cs, pc_start, dc->pc - pc_start, 0);
qemu_log("\nisize=%d osize=%d\n",
dc->pc - pc_start, tcg_op_buf_count());
}
#endif
}