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translate.c
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translate.c
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/*
* Xtensa ISA:
* http://www.tensilica.com/products/literature-docs/documentation/xtensa-isa-databook.htm
*
* Copyright (c) 2011, Max Filippov, Open Source and Linux Lab.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the Open Source and Linux Lab nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdio.h>
#include "cpu.h"
#include "exec-all.h"
#include "disas.h"
#include "tcg-op.h"
#include "qemu-log.h"
#include "sysemu.h"
#include "helper.h"
#define GEN_HELPER 1
#include "helper.h"
typedef struct DisasContext {
const XtensaConfig *config;
TranslationBlock *tb;
uint32_t pc;
uint32_t next_pc;
int cring;
int ring;
uint32_t lbeg;
uint32_t lend;
TCGv_i32 litbase;
int is_jmp;
int singlestep_enabled;
bool sar_5bit;
bool sar_m32_5bit;
bool sar_m32_allocated;
TCGv_i32 sar_m32;
uint32_t ccount_delta;
unsigned used_window;
bool debug;
bool icount;
TCGv_i32 next_icount;
unsigned cpenable;
} DisasContext;
static TCGv_ptr cpu_env;
static TCGv_i32 cpu_pc;
static TCGv_i32 cpu_R[16];
static TCGv_i32 cpu_FR[16];
static TCGv_i32 cpu_SR[256];
static TCGv_i32 cpu_UR[256];
#include "gen-icount.h"
static const char * const sregnames[256] = {
[LBEG] = "LBEG",
[LEND] = "LEND",
[LCOUNT] = "LCOUNT",
[SAR] = "SAR",
[BR] = "BR",
[LITBASE] = "LITBASE",
[SCOMPARE1] = "SCOMPARE1",
[ACCLO] = "ACCLO",
[ACCHI] = "ACCHI",
[MR] = "MR0",
[MR + 1] = "MR1",
[MR + 2] = "MR2",
[MR + 3] = "MR3",
[WINDOW_BASE] = "WINDOW_BASE",
[WINDOW_START] = "WINDOW_START",
[PTEVADDR] = "PTEVADDR",
[RASID] = "RASID",
[ITLBCFG] = "ITLBCFG",
[DTLBCFG] = "DTLBCFG",
[IBREAKENABLE] = "IBREAKENABLE",
[IBREAKA] = "IBREAKA0",
[IBREAKA + 1] = "IBREAKA1",
[DBREAKA] = "DBREAKA0",
[DBREAKA + 1] = "DBREAKA1",
[DBREAKC] = "DBREAKC0",
[DBREAKC + 1] = "DBREAKC1",
[EPC1] = "EPC1",
[EPC1 + 1] = "EPC2",
[EPC1 + 2] = "EPC3",
[EPC1 + 3] = "EPC4",
[EPC1 + 4] = "EPC5",
[EPC1 + 5] = "EPC6",
[EPC1 + 6] = "EPC7",
[DEPC] = "DEPC",
[EPS2] = "EPS2",
[EPS2 + 1] = "EPS3",
[EPS2 + 2] = "EPS4",
[EPS2 + 3] = "EPS5",
[EPS2 + 4] = "EPS6",
[EPS2 + 5] = "EPS7",
[EXCSAVE1] = "EXCSAVE1",
[EXCSAVE1 + 1] = "EXCSAVE2",
[EXCSAVE1 + 2] = "EXCSAVE3",
[EXCSAVE1 + 3] = "EXCSAVE4",
[EXCSAVE1 + 4] = "EXCSAVE5",
[EXCSAVE1 + 5] = "EXCSAVE6",
[EXCSAVE1 + 6] = "EXCSAVE7",
[CPENABLE] = "CPENABLE",
[INTSET] = "INTSET",
[INTCLEAR] = "INTCLEAR",
[INTENABLE] = "INTENABLE",
[PS] = "PS",
[VECBASE] = "VECBASE",
[EXCCAUSE] = "EXCCAUSE",
[DEBUGCAUSE] = "DEBUGCAUSE",
[CCOUNT] = "CCOUNT",
[PRID] = "PRID",
[ICOUNT] = "ICOUNT",
[ICOUNTLEVEL] = "ICOUNTLEVEL",
[EXCVADDR] = "EXCVADDR",
[CCOMPARE] = "CCOMPARE0",
[CCOMPARE + 1] = "CCOMPARE1",
[CCOMPARE + 2] = "CCOMPARE2",
};
static const char * const uregnames[256] = {
[THREADPTR] = "THREADPTR",
[FCR] = "FCR",
[FSR] = "FSR",
};
void xtensa_translate_init(void)
{
static const char * const regnames[] = {
"ar0", "ar1", "ar2", "ar3",
"ar4", "ar5", "ar6", "ar7",
"ar8", "ar9", "ar10", "ar11",
"ar12", "ar13", "ar14", "ar15",
};
static const char * const fregnames[] = {
"f0", "f1", "f2", "f3",
"f4", "f5", "f6", "f7",
"f8", "f9", "f10", "f11",
"f12", "f13", "f14", "f15",
};
int i;
cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
cpu_pc = tcg_global_mem_new_i32(TCG_AREG0,
offsetof(CPUXtensaState, pc), "pc");
for (i = 0; i < 16; i++) {
cpu_R[i] = tcg_global_mem_new_i32(TCG_AREG0,
offsetof(CPUXtensaState, regs[i]),
regnames[i]);
}
for (i = 0; i < 16; i++) {
cpu_FR[i] = tcg_global_mem_new_i32(TCG_AREG0,
offsetof(CPUXtensaState, fregs[i]),
fregnames[i]);
}
for (i = 0; i < 256; ++i) {
if (sregnames[i]) {
cpu_SR[i] = tcg_global_mem_new_i32(TCG_AREG0,
offsetof(CPUXtensaState, sregs[i]),
sregnames[i]);
}
}
for (i = 0; i < 256; ++i) {
if (uregnames[i]) {
cpu_UR[i] = tcg_global_mem_new_i32(TCG_AREG0,
offsetof(CPUXtensaState, uregs[i]),
uregnames[i]);
}
}
#define GEN_HELPER 2
#include "helper.h"
}
static inline bool option_bits_enabled(DisasContext *dc, uint64_t opt)
{
return xtensa_option_bits_enabled(dc->config, opt);
}
static inline bool option_enabled(DisasContext *dc, int opt)
{
return xtensa_option_enabled(dc->config, opt);
}
static void init_litbase(DisasContext *dc)
{
if (dc->tb->flags & XTENSA_TBFLAG_LITBASE) {
dc->litbase = tcg_temp_local_new_i32();
tcg_gen_andi_i32(dc->litbase, cpu_SR[LITBASE], 0xfffff000);
}
}
static void reset_litbase(DisasContext *dc)
{
if (dc->tb->flags & XTENSA_TBFLAG_LITBASE) {
tcg_temp_free(dc->litbase);
}
}
static void init_sar_tracker(DisasContext *dc)
{
dc->sar_5bit = false;
dc->sar_m32_5bit = false;
dc->sar_m32_allocated = false;
}
static void reset_sar_tracker(DisasContext *dc)
{
if (dc->sar_m32_allocated) {
tcg_temp_free(dc->sar_m32);
}
}
static void gen_right_shift_sar(DisasContext *dc, TCGv_i32 sa)
{
tcg_gen_andi_i32(cpu_SR[SAR], sa, 0x1f);
if (dc->sar_m32_5bit) {
tcg_gen_discard_i32(dc->sar_m32);
}
dc->sar_5bit = true;
dc->sar_m32_5bit = false;
}
static void gen_left_shift_sar(DisasContext *dc, TCGv_i32 sa)
{
TCGv_i32 tmp = tcg_const_i32(32);
if (!dc->sar_m32_allocated) {
dc->sar_m32 = tcg_temp_local_new_i32();
dc->sar_m32_allocated = true;
}
tcg_gen_andi_i32(dc->sar_m32, sa, 0x1f);
tcg_gen_sub_i32(cpu_SR[SAR], tmp, dc->sar_m32);
dc->sar_5bit = false;
dc->sar_m32_5bit = true;
tcg_temp_free(tmp);
}
static void gen_advance_ccount(DisasContext *dc)
{
if (dc->ccount_delta > 0) {
TCGv_i32 tmp = tcg_const_i32(dc->ccount_delta);
dc->ccount_delta = 0;
gen_helper_advance_ccount(cpu_env, tmp);
tcg_temp_free(tmp);
}
}
static void reset_used_window(DisasContext *dc)
{
dc->used_window = 0;
}
static void gen_exception(DisasContext *dc, int excp)
{
TCGv_i32 tmp = tcg_const_i32(excp);
gen_advance_ccount(dc);
gen_helper_exception(cpu_env, tmp);
tcg_temp_free(tmp);
}
static void gen_exception_cause(DisasContext *dc, uint32_t cause)
{
TCGv_i32 tpc = tcg_const_i32(dc->pc);
TCGv_i32 tcause = tcg_const_i32(cause);
gen_advance_ccount(dc);
gen_helper_exception_cause(cpu_env, tpc, tcause);
tcg_temp_free(tpc);
tcg_temp_free(tcause);
if (cause == ILLEGAL_INSTRUCTION_CAUSE ||
cause == SYSCALL_CAUSE) {
dc->is_jmp = DISAS_UPDATE;
}
}
static void gen_exception_cause_vaddr(DisasContext *dc, uint32_t cause,
TCGv_i32 vaddr)
{
TCGv_i32 tpc = tcg_const_i32(dc->pc);
TCGv_i32 tcause = tcg_const_i32(cause);
gen_advance_ccount(dc);
gen_helper_exception_cause_vaddr(cpu_env, tpc, tcause, vaddr);
tcg_temp_free(tpc);
tcg_temp_free(tcause);
}
static void gen_debug_exception(DisasContext *dc, uint32_t cause)
{
TCGv_i32 tpc = tcg_const_i32(dc->pc);
TCGv_i32 tcause = tcg_const_i32(cause);
gen_advance_ccount(dc);
gen_helper_debug_exception(cpu_env, tpc, tcause);
tcg_temp_free(tpc);
tcg_temp_free(tcause);
if (cause & (DEBUGCAUSE_IB | DEBUGCAUSE_BI | DEBUGCAUSE_BN)) {
dc->is_jmp = DISAS_UPDATE;
}
}
static void gen_check_privilege(DisasContext *dc)
{
if (dc->cring) {
gen_exception_cause(dc, PRIVILEGED_CAUSE);
dc->is_jmp = DISAS_UPDATE;
}
}
static void gen_check_cpenable(DisasContext *dc, unsigned cp)
{
if (option_enabled(dc, XTENSA_OPTION_COPROCESSOR) &&
!(dc->cpenable & (1 << cp))) {
gen_exception_cause(dc, COPROCESSOR0_DISABLED + cp);
dc->is_jmp = DISAS_UPDATE;
}
}
static void gen_jump_slot(DisasContext *dc, TCGv dest, int slot)
{
tcg_gen_mov_i32(cpu_pc, dest);
gen_advance_ccount(dc);
if (dc->icount) {
tcg_gen_mov_i32(cpu_SR[ICOUNT], dc->next_icount);
}
if (dc->singlestep_enabled) {
gen_exception(dc, EXCP_DEBUG);
} else {
if (slot >= 0) {
tcg_gen_goto_tb(slot);
tcg_gen_exit_tb((tcg_target_long)dc->tb + slot);
} else {
tcg_gen_exit_tb(0);
}
}
dc->is_jmp = DISAS_UPDATE;
}
static void gen_jump(DisasContext *dc, TCGv dest)
{
gen_jump_slot(dc, dest, -1);
}
static void gen_jumpi(DisasContext *dc, uint32_t dest, int slot)
{
TCGv_i32 tmp = tcg_const_i32(dest);
if (((dc->pc ^ dest) & TARGET_PAGE_MASK) != 0) {
slot = -1;
}
gen_jump_slot(dc, tmp, slot);
tcg_temp_free(tmp);
}
static void gen_callw_slot(DisasContext *dc, int callinc, TCGv_i32 dest,
int slot)
{
TCGv_i32 tcallinc = tcg_const_i32(callinc);
tcg_gen_deposit_i32(cpu_SR[PS], cpu_SR[PS],
tcallinc, PS_CALLINC_SHIFT, PS_CALLINC_LEN);
tcg_temp_free(tcallinc);
tcg_gen_movi_i32(cpu_R[callinc << 2],
(callinc << 30) | (dc->next_pc & 0x3fffffff));
gen_jump_slot(dc, dest, slot);
}
static void gen_callw(DisasContext *dc, int callinc, TCGv_i32 dest)
{
gen_callw_slot(dc, callinc, dest, -1);
}
static void gen_callwi(DisasContext *dc, int callinc, uint32_t dest, int slot)
{
TCGv_i32 tmp = tcg_const_i32(dest);
if (((dc->pc ^ dest) & TARGET_PAGE_MASK) != 0) {
slot = -1;
}
gen_callw_slot(dc, callinc, tmp, slot);
tcg_temp_free(tmp);
}
static bool gen_check_loop_end(DisasContext *dc, int slot)
{
if (option_enabled(dc, XTENSA_OPTION_LOOP) &&
!(dc->tb->flags & XTENSA_TBFLAG_EXCM) &&
dc->next_pc == dc->lend) {
int label = gen_new_label();
gen_advance_ccount(dc);
tcg_gen_brcondi_i32(TCG_COND_EQ, cpu_SR[LCOUNT], 0, label);
tcg_gen_subi_i32(cpu_SR[LCOUNT], cpu_SR[LCOUNT], 1);
gen_jumpi(dc, dc->lbeg, slot);
gen_set_label(label);
gen_jumpi(dc, dc->next_pc, -1);
return true;
}
return false;
}
static void gen_jumpi_check_loop_end(DisasContext *dc, int slot)
{
if (!gen_check_loop_end(dc, slot)) {
gen_jumpi(dc, dc->next_pc, slot);
}
}
static void gen_brcond(DisasContext *dc, TCGCond cond,
TCGv_i32 t0, TCGv_i32 t1, uint32_t offset)
{
int label = gen_new_label();
gen_advance_ccount(dc);
tcg_gen_brcond_i32(cond, t0, t1, label);
gen_jumpi_check_loop_end(dc, 0);
gen_set_label(label);
gen_jumpi(dc, dc->pc + offset, 1);
}
static void gen_brcondi(DisasContext *dc, TCGCond cond,
TCGv_i32 t0, uint32_t t1, uint32_t offset)
{
TCGv_i32 tmp = tcg_const_i32(t1);
gen_brcond(dc, cond, t0, tmp, offset);
tcg_temp_free(tmp);
}
static void gen_rsr_ccount(DisasContext *dc, TCGv_i32 d, uint32_t sr)
{
gen_advance_ccount(dc);
tcg_gen_mov_i32(d, cpu_SR[sr]);
}
static void gen_rsr_ptevaddr(DisasContext *dc, TCGv_i32 d, uint32_t sr)
{
tcg_gen_shri_i32(d, cpu_SR[EXCVADDR], 10);
tcg_gen_or_i32(d, d, cpu_SR[sr]);
tcg_gen_andi_i32(d, d, 0xfffffffc);
}
static void gen_rsr(DisasContext *dc, TCGv_i32 d, uint32_t sr)
{
static void (* const rsr_handler[256])(DisasContext *dc,
TCGv_i32 d, uint32_t sr) = {
[CCOUNT] = gen_rsr_ccount,
[PTEVADDR] = gen_rsr_ptevaddr,
};
if (sregnames[sr]) {
if (rsr_handler[sr]) {
rsr_handler[sr](dc, d, sr);
} else {
tcg_gen_mov_i32(d, cpu_SR[sr]);
}
} else {
qemu_log("RSR %d not implemented, ", sr);
}
}
static void gen_wsr_lbeg(DisasContext *dc, uint32_t sr, TCGv_i32 s)
{
gen_helper_wsr_lbeg(cpu_env, s);
gen_jumpi_check_loop_end(dc, 0);
}
static void gen_wsr_lend(DisasContext *dc, uint32_t sr, TCGv_i32 s)
{
gen_helper_wsr_lend(cpu_env, s);
gen_jumpi_check_loop_end(dc, 0);
}
static void gen_wsr_sar(DisasContext *dc, uint32_t sr, TCGv_i32 s)
{
tcg_gen_andi_i32(cpu_SR[sr], s, 0x3f);
if (dc->sar_m32_5bit) {
tcg_gen_discard_i32(dc->sar_m32);
}
dc->sar_5bit = false;
dc->sar_m32_5bit = false;
}
static void gen_wsr_br(DisasContext *dc, uint32_t sr, TCGv_i32 s)
{
tcg_gen_andi_i32(cpu_SR[sr], s, 0xffff);
}
static void gen_wsr_litbase(DisasContext *dc, uint32_t sr, TCGv_i32 s)
{
tcg_gen_andi_i32(cpu_SR[sr], s, 0xfffff001);
/* This can change tb->flags, so exit tb */
gen_jumpi_check_loop_end(dc, -1);
}
static void gen_wsr_acchi(DisasContext *dc, uint32_t sr, TCGv_i32 s)
{
tcg_gen_ext8s_i32(cpu_SR[sr], s);
}
static void gen_wsr_windowbase(DisasContext *dc, uint32_t sr, TCGv_i32 v)
{
gen_helper_wsr_windowbase(cpu_env, v);
reset_used_window(dc);
}
static void gen_wsr_windowstart(DisasContext *dc, uint32_t sr, TCGv_i32 v)
{
tcg_gen_andi_i32(cpu_SR[sr], v, (1 << dc->config->nareg / 4) - 1);
reset_used_window(dc);
}
static void gen_wsr_ptevaddr(DisasContext *dc, uint32_t sr, TCGv_i32 v)
{
tcg_gen_andi_i32(cpu_SR[sr], v, 0xffc00000);
}
static void gen_wsr_rasid(DisasContext *dc, uint32_t sr, TCGv_i32 v)
{
gen_helper_wsr_rasid(cpu_env, v);
/* This can change tb->flags, so exit tb */
gen_jumpi_check_loop_end(dc, -1);
}
static void gen_wsr_tlbcfg(DisasContext *dc, uint32_t sr, TCGv_i32 v)
{
tcg_gen_andi_i32(cpu_SR[sr], v, 0x01130000);
}
static void gen_wsr_ibreakenable(DisasContext *dc, uint32_t sr, TCGv_i32 v)
{
gen_helper_wsr_ibreakenable(cpu_env, v);
gen_jumpi_check_loop_end(dc, 0);
}
static void gen_wsr_ibreaka(DisasContext *dc, uint32_t sr, TCGv_i32 v)
{
unsigned id = sr - IBREAKA;
if (id < dc->config->nibreak) {
TCGv_i32 tmp = tcg_const_i32(id);
gen_helper_wsr_ibreaka(cpu_env, tmp, v);
tcg_temp_free(tmp);
gen_jumpi_check_loop_end(dc, 0);
}
}
static void gen_wsr_dbreaka(DisasContext *dc, uint32_t sr, TCGv_i32 v)
{
unsigned id = sr - DBREAKA;
if (id < dc->config->ndbreak) {
TCGv_i32 tmp = tcg_const_i32(id);
gen_helper_wsr_dbreaka(cpu_env, tmp, v);
tcg_temp_free(tmp);
}
}
static void gen_wsr_dbreakc(DisasContext *dc, uint32_t sr, TCGv_i32 v)
{
unsigned id = sr - DBREAKC;
if (id < dc->config->ndbreak) {
TCGv_i32 tmp = tcg_const_i32(id);
gen_helper_wsr_dbreakc(cpu_env, tmp, v);
tcg_temp_free(tmp);
}
}
static void gen_wsr_cpenable(DisasContext *dc, uint32_t sr, TCGv_i32 v)
{
tcg_gen_andi_i32(cpu_SR[sr], v, 0xff);
/* This can change tb->flags, so exit tb */
gen_jumpi_check_loop_end(dc, -1);
}
static void gen_wsr_intset(DisasContext *dc, uint32_t sr, TCGv_i32 v)
{
tcg_gen_andi_i32(cpu_SR[sr], v,
dc->config->inttype_mask[INTTYPE_SOFTWARE]);
gen_helper_check_interrupts(cpu_env);
gen_jumpi_check_loop_end(dc, 0);
}
static void gen_wsr_intclear(DisasContext *dc, uint32_t sr, TCGv_i32 v)
{
TCGv_i32 tmp = tcg_temp_new_i32();
tcg_gen_andi_i32(tmp, v,
dc->config->inttype_mask[INTTYPE_EDGE] |
dc->config->inttype_mask[INTTYPE_NMI] |
dc->config->inttype_mask[INTTYPE_SOFTWARE]);
tcg_gen_andc_i32(cpu_SR[INTSET], cpu_SR[INTSET], tmp);
tcg_temp_free(tmp);
gen_helper_check_interrupts(cpu_env);
}
static void gen_wsr_intenable(DisasContext *dc, uint32_t sr, TCGv_i32 v)
{
tcg_gen_mov_i32(cpu_SR[sr], v);
gen_helper_check_interrupts(cpu_env);
gen_jumpi_check_loop_end(dc, 0);
}
static void gen_wsr_ps(DisasContext *dc, uint32_t sr, TCGv_i32 v)
{
uint32_t mask = PS_WOE | PS_CALLINC | PS_OWB |
PS_UM | PS_EXCM | PS_INTLEVEL;
if (option_enabled(dc, XTENSA_OPTION_MMU)) {
mask |= PS_RING;
}
tcg_gen_andi_i32(cpu_SR[sr], v, mask);
reset_used_window(dc);
gen_helper_check_interrupts(cpu_env);
/* This can change mmu index and tb->flags, so exit tb */
gen_jumpi_check_loop_end(dc, -1);
}
static void gen_wsr_debugcause(DisasContext *dc, uint32_t sr, TCGv_i32 v)
{
}
static void gen_wsr_prid(DisasContext *dc, uint32_t sr, TCGv_i32 v)
{
}
static void gen_wsr_icount(DisasContext *dc, uint32_t sr, TCGv_i32 v)
{
if (dc->icount) {
tcg_gen_mov_i32(dc->next_icount, v);
} else {
tcg_gen_mov_i32(cpu_SR[sr], v);
}
}
static void gen_wsr_icountlevel(DisasContext *dc, uint32_t sr, TCGv_i32 v)
{
tcg_gen_andi_i32(cpu_SR[sr], v, 0xf);
/* This can change tb->flags, so exit tb */
gen_jumpi_check_loop_end(dc, -1);
}
static void gen_wsr_ccompare(DisasContext *dc, uint32_t sr, TCGv_i32 v)
{
uint32_t id = sr - CCOMPARE;
if (id < dc->config->nccompare) {
uint32_t int_bit = 1 << dc->config->timerint[id];
gen_advance_ccount(dc);
tcg_gen_mov_i32(cpu_SR[sr], v);
tcg_gen_andi_i32(cpu_SR[INTSET], cpu_SR[INTSET], ~int_bit);
gen_helper_check_interrupts(cpu_env);
}
}
static void gen_wsr(DisasContext *dc, uint32_t sr, TCGv_i32 s)
{
static void (* const wsr_handler[256])(DisasContext *dc,
uint32_t sr, TCGv_i32 v) = {
[LBEG] = gen_wsr_lbeg,
[LEND] = gen_wsr_lend,
[SAR] = gen_wsr_sar,
[BR] = gen_wsr_br,
[LITBASE] = gen_wsr_litbase,
[ACCHI] = gen_wsr_acchi,
[WINDOW_BASE] = gen_wsr_windowbase,
[WINDOW_START] = gen_wsr_windowstart,
[PTEVADDR] = gen_wsr_ptevaddr,
[RASID] = gen_wsr_rasid,
[ITLBCFG] = gen_wsr_tlbcfg,
[DTLBCFG] = gen_wsr_tlbcfg,
[IBREAKENABLE] = gen_wsr_ibreakenable,
[IBREAKA] = gen_wsr_ibreaka,
[IBREAKA + 1] = gen_wsr_ibreaka,
[DBREAKA] = gen_wsr_dbreaka,
[DBREAKA + 1] = gen_wsr_dbreaka,
[DBREAKC] = gen_wsr_dbreakc,
[DBREAKC + 1] = gen_wsr_dbreakc,
[CPENABLE] = gen_wsr_cpenable,
[INTSET] = gen_wsr_intset,
[INTCLEAR] = gen_wsr_intclear,
[INTENABLE] = gen_wsr_intenable,
[PS] = gen_wsr_ps,
[DEBUGCAUSE] = gen_wsr_debugcause,
[PRID] = gen_wsr_prid,
[ICOUNT] = gen_wsr_icount,
[ICOUNTLEVEL] = gen_wsr_icountlevel,
[CCOMPARE] = gen_wsr_ccompare,
[CCOMPARE + 1] = gen_wsr_ccompare,
[CCOMPARE + 2] = gen_wsr_ccompare,
};
if (sregnames[sr]) {
if (wsr_handler[sr]) {
wsr_handler[sr](dc, sr, s);
} else {
tcg_gen_mov_i32(cpu_SR[sr], s);
}
} else {
qemu_log("WSR %d not implemented, ", sr);
}
}
static void gen_wur(uint32_t ur, TCGv_i32 s)
{
switch (ur) {
case FCR:
gen_helper_wur_fcr(cpu_env, s);
break;
case FSR:
tcg_gen_andi_i32(cpu_UR[ur], s, 0xffffff80);
break;
default:
tcg_gen_mov_i32(cpu_UR[ur], s);
break;
}
}
static void gen_load_store_alignment(DisasContext *dc, int shift,
TCGv_i32 addr, bool no_hw_alignment)
{
if (!option_enabled(dc, XTENSA_OPTION_UNALIGNED_EXCEPTION)) {
tcg_gen_andi_i32(addr, addr, ~0 << shift);
} else if (option_enabled(dc, XTENSA_OPTION_HW_ALIGNMENT) &&
no_hw_alignment) {
int label = gen_new_label();
TCGv_i32 tmp = tcg_temp_new_i32();
tcg_gen_andi_i32(tmp, addr, ~(~0 << shift));
tcg_gen_brcondi_i32(TCG_COND_EQ, tmp, 0, label);
gen_exception_cause_vaddr(dc, LOAD_STORE_ALIGNMENT_CAUSE, addr);
gen_set_label(label);
tcg_temp_free(tmp);
}
}
static void gen_waiti(DisasContext *dc, uint32_t imm4)
{
TCGv_i32 pc = tcg_const_i32(dc->next_pc);
TCGv_i32 intlevel = tcg_const_i32(imm4);
gen_advance_ccount(dc);
gen_helper_waiti(cpu_env, pc, intlevel);
tcg_temp_free(pc);
tcg_temp_free(intlevel);
}
static void gen_window_check1(DisasContext *dc, unsigned r1)
{
if (dc->tb->flags & XTENSA_TBFLAG_EXCM) {
return;
}
if (option_enabled(dc, XTENSA_OPTION_WINDOWED_REGISTER) &&
r1 / 4 > dc->used_window) {
TCGv_i32 pc = tcg_const_i32(dc->pc);
TCGv_i32 w = tcg_const_i32(r1 / 4);
dc->used_window = r1 / 4;
gen_advance_ccount(dc);
gen_helper_window_check(cpu_env, pc, w);
tcg_temp_free(w);
tcg_temp_free(pc);
}
}
static void gen_window_check2(DisasContext *dc, unsigned r1, unsigned r2)
{
gen_window_check1(dc, r1 > r2 ? r1 : r2);
}
static void gen_window_check3(DisasContext *dc, unsigned r1, unsigned r2,
unsigned r3)
{
gen_window_check2(dc, r1, r2 > r3 ? r2 : r3);
}
static TCGv_i32 gen_mac16_m(TCGv_i32 v, bool hi, bool is_unsigned)
{
TCGv_i32 m = tcg_temp_new_i32();
if (hi) {
(is_unsigned ? tcg_gen_shri_i32 : tcg_gen_sari_i32)(m, v, 16);
} else {
(is_unsigned ? tcg_gen_ext16u_i32 : tcg_gen_ext16s_i32)(m, v);
}
return m;
}
static void disas_xtensa_insn(DisasContext *dc)
{
#define HAS_OPTION_BITS(opt) do { \
if (!option_bits_enabled(dc, opt)) { \
qemu_log("Option is not enabled %s:%d\n", \
__FILE__, __LINE__); \
goto invalid_opcode; \
} \
} while (0)
#define HAS_OPTION(opt) HAS_OPTION_BITS(XTENSA_OPTION_BIT(opt))
#define TBD() qemu_log("TBD(pc = %08x): %s:%d\n", dc->pc, __FILE__, __LINE__)
#define RESERVED() do { \
qemu_log("RESERVED(pc = %08x, %02x%02x%02x): %s:%d\n", \
dc->pc, b0, b1, b2, __FILE__, __LINE__); \
goto invalid_opcode; \
} while (0)
#ifdef TARGET_WORDS_BIGENDIAN
#define OP0 (((b0) & 0xf0) >> 4)
#define OP1 (((b2) & 0xf0) >> 4)
#define OP2 ((b2) & 0xf)
#define RRR_R ((b1) & 0xf)
#define RRR_S (((b1) & 0xf0) >> 4)
#define RRR_T ((b0) & 0xf)
#else
#define OP0 (((b0) & 0xf))
#define OP1 (((b2) & 0xf))
#define OP2 (((b2) & 0xf0) >> 4)
#define RRR_R (((b1) & 0xf0) >> 4)
#define RRR_S (((b1) & 0xf))
#define RRR_T (((b0) & 0xf0) >> 4)
#endif
#define RRR_X ((RRR_R & 0x4) >> 2)
#define RRR_Y ((RRR_T & 0x4) >> 2)
#define RRR_W (RRR_R & 0x3)
#define RRRN_R RRR_R
#define RRRN_S RRR_S
#define RRRN_T RRR_T
#define RRI8_R RRR_R
#define RRI8_S RRR_S
#define RRI8_T RRR_T
#define RRI8_IMM8 (b2)
#define RRI8_IMM8_SE ((((b2) & 0x80) ? 0xffffff00 : 0) | RRI8_IMM8)
#ifdef TARGET_WORDS_BIGENDIAN
#define RI16_IMM16 (((b1) << 8) | (b2))
#else
#define RI16_IMM16 (((b2) << 8) | (b1))
#endif
#ifdef TARGET_WORDS_BIGENDIAN
#define CALL_N (((b0) & 0xc) >> 2)
#define CALL_OFFSET ((((b0) & 0x3) << 16) | ((b1) << 8) | (b2))
#else
#define CALL_N (((b0) & 0x30) >> 4)
#define CALL_OFFSET ((((b0) & 0xc0) >> 6) | ((b1) << 2) | ((b2) << 10))
#endif
#define CALL_OFFSET_SE \
(((CALL_OFFSET & 0x20000) ? 0xfffc0000 : 0) | CALL_OFFSET)
#define CALLX_N CALL_N
#ifdef TARGET_WORDS_BIGENDIAN
#define CALLX_M ((b0) & 0x3)
#else
#define CALLX_M (((b0) & 0xc0) >> 6)
#endif
#define CALLX_S RRR_S
#define BRI12_M CALLX_M
#define BRI12_S RRR_S
#ifdef TARGET_WORDS_BIGENDIAN
#define BRI12_IMM12 ((((b1) & 0xf) << 8) | (b2))
#else
#define BRI12_IMM12 ((((b1) & 0xf0) >> 4) | ((b2) << 4))
#endif
#define BRI12_IMM12_SE (((BRI12_IMM12 & 0x800) ? 0xfffff000 : 0) | BRI12_IMM12)
#define BRI8_M BRI12_M
#define BRI8_R RRI8_R
#define BRI8_S RRI8_S
#define BRI8_IMM8 RRI8_IMM8
#define BRI8_IMM8_SE RRI8_IMM8_SE
#define RSR_SR (b1)
uint8_t b0 = cpu_ldub_code(cpu_single_env, dc->pc);
uint8_t b1 = cpu_ldub_code(cpu_single_env, dc->pc + 1);
uint8_t b2 = 0;
static const uint32_t B4CONST[] = {
0xffffffff, 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 16, 32, 64, 128, 256
};
static const uint32_t B4CONSTU[] = {
32768, 65536, 2, 3, 4, 5, 6, 7, 8, 10, 12, 16, 32, 64, 128, 256
};
if (OP0 >= 8) {
dc->next_pc = dc->pc + 2;
HAS_OPTION(XTENSA_OPTION_CODE_DENSITY);
} else {
dc->next_pc = dc->pc + 3;
b2 = cpu_ldub_code(cpu_single_env, dc->pc + 2);
}
switch (OP0) {
case 0: /*QRST*/
switch (OP1) {
case 0: /*RST0*/
switch (OP2) {
case 0: /*ST0*/
if ((RRR_R & 0xc) == 0x8) {
HAS_OPTION(XTENSA_OPTION_BOOLEAN);
}
switch (RRR_R) {
case 0: /*SNM0*/
switch (CALLX_M) {
case 0: /*ILL*/
gen_exception_cause(dc, ILLEGAL_INSTRUCTION_CAUSE);
break;
case 1: /*reserved*/
RESERVED();
break;
case 2: /*JR*/
switch (CALLX_N) {
case 0: /*RET*/
case 2: /*JX*/
gen_window_check1(dc, CALLX_S);
gen_jump(dc, cpu_R[CALLX_S]);
break;
case 1: /*RETWw*/
HAS_OPTION(XTENSA_OPTION_WINDOWED_REGISTER);
{
TCGv_i32 tmp = tcg_const_i32(dc->pc);
gen_advance_ccount(dc);
gen_helper_retw(tmp, cpu_env, tmp);
gen_jump(dc, tmp);
tcg_temp_free(tmp);
}
break;
case 3: /*reserved*/
RESERVED();
break;
}
break;
case 3: /*CALLX*/
gen_window_check2(dc, CALLX_S, CALLX_N << 2);
switch (CALLX_N) {
case 0: /*CALLX0*/
{
TCGv_i32 tmp = tcg_temp_new_i32();
tcg_gen_mov_i32(tmp, cpu_R[CALLX_S]);
tcg_gen_movi_i32(cpu_R[0], dc->next_pc);
gen_jump(dc, tmp);
tcg_temp_free(tmp);
}
break;
case 1: /*CALLX4w*/
case 2: /*CALLX8w*/
case 3: /*CALLX12w*/
HAS_OPTION(XTENSA_OPTION_WINDOWED_REGISTER);
{
TCGv_i32 tmp = tcg_temp_new_i32();
tcg_gen_mov_i32(tmp, cpu_R[CALLX_S]);
gen_callw(dc, CALLX_N, tmp);
tcg_temp_free(tmp);
}
break;
}
break;
}
break;
case 1: /*MOVSPw*/
HAS_OPTION(XTENSA_OPTION_WINDOWED_REGISTER);