/*
* Copyright(c) 2019-2021 Qualcomm Innovation Center, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#define QEMU_GENERATE
#include "qemu/osdep.h"
#include "qemu/log.h"
#include "cpu.h"
#include "internal.h"
#include "tcg/tcg-op.h"
#include "insn.h"
#include "opcodes.h"
#include "translate.h"
#include "macros.h"
#include "gen_tcg.h"
static inline TCGv gen_read_preg(TCGv pred, uint8_t num)
{
tcg_gen_mov_tl(pred, hex_pred[num]);
return pred;
}
static inline void gen_log_predicated_reg_write(int rnum, TCGv val, int slot)
{
TCGv one = tcg_const_tl(1);
TCGv zero = tcg_const_tl(0);
TCGv slot_mask = tcg_temp_new();
tcg_gen_andi_tl(slot_mask, hex_slot_cancelled, 1 << slot);
tcg_gen_movcond_tl(TCG_COND_EQ, hex_new_value[rnum], slot_mask, zero,
val, hex_new_value[rnum]);
#if HEX_DEBUG
/* Do this so HELPER(debug_commit_end) will know */
tcg_gen_movcond_tl(TCG_COND_EQ, hex_reg_written[rnum], slot_mask, zero,
one, hex_reg_written[rnum]);
#endif
tcg_temp_free(one);
tcg_temp_free(zero);
tcg_temp_free(slot_mask);
}
static inline void gen_log_reg_write(int rnum, TCGv val)
{
tcg_gen_mov_tl(hex_new_value[rnum], val);
#if HEX_DEBUG
/* Do this so HELPER(debug_commit_end) will know */
tcg_gen_movi_tl(hex_reg_written[rnum], 1);
#endif
}
static void gen_log_predicated_reg_write_pair(int rnum, TCGv_i64 val, int slot)
{
TCGv val32 = tcg_temp_new();
TCGv one = tcg_const_tl(1);
TCGv zero = tcg_const_tl(0);
TCGv slot_mask = tcg_temp_new();
tcg_gen_andi_tl(slot_mask, hex_slot_cancelled, 1 << slot);
/* Low word */
tcg_gen_extrl_i64_i32(val32, val);
tcg_gen_movcond_tl(TCG_COND_EQ, hex_new_value[rnum], slot_mask, zero,
val32, hex_new_value[rnum]);
#if HEX_DEBUG
/* Do this so HELPER(debug_commit_end) will know */
tcg_gen_movcond_tl(TCG_COND_EQ, hex_reg_written[rnum],
slot_mask, zero,
one, hex_reg_written[rnum]);
#endif
/* High word */
tcg_gen_extrh_i64_i32(val32, val);
tcg_gen_movcond_tl(TCG_COND_EQ, hex_new_value[rnum + 1],
slot_mask, zero,
val32, hex_new_value[rnum + 1]);
#if HEX_DEBUG
/* Do this so HELPER(debug_commit_end) will know */
tcg_gen_movcond_tl(TCG_COND_EQ, hex_reg_written[rnum + 1],
slot_mask, zero,
one, hex_reg_written[rnum + 1]);
#endif
tcg_temp_free(val32);
tcg_temp_free(one);
tcg_temp_free(zero);
tcg_temp_free(slot_mask);
}
static void gen_log_reg_write_pair(int rnum, TCGv_i64 val)
{
/* Low word */
tcg_gen_extrl_i64_i32(hex_new_value[rnum], val);
#if HEX_DEBUG
/* Do this so HELPER(debug_commit_end) will know */
tcg_gen_movi_tl(hex_reg_written[rnum], 1);
#endif
/* High word */
tcg_gen_extrh_i64_i32(hex_new_value[rnum + 1], val);
#if HEX_DEBUG
/* Do this so HELPER(debug_commit_end) will know */
tcg_gen_movi_tl(hex_reg_written[rnum + 1], 1);
#endif
}
static inline void gen_log_pred_write(int pnum, TCGv val)
{
TCGv zero = tcg_const_tl(0);
TCGv base_val = tcg_temp_new();
TCGv and_val = tcg_temp_new();
TCGv pred_written = tcg_temp_new();
/* Multiple writes to the same preg are and'ed together */
tcg_gen_andi_tl(base_val, val, 0xff);
tcg_gen_and_tl(and_val, base_val, hex_new_pred_value[pnum]);
tcg_gen_andi_tl(pred_written, hex_pred_written, 1 << pnum);
tcg_gen_movcond_tl(TCG_COND_NE, hex_new_pred_value[pnum],
pred_written, zero,
and_val, base_val);
tcg_gen_ori_tl(hex_pred_written, hex_pred_written, 1 << pnum);
tcg_temp_free(zero);
tcg_temp_free(base_val);
tcg_temp_free(and_val);
tcg_temp_free(pred_written);
}
static inline void gen_read_p3_0(TCGv control_reg)
{
tcg_gen_movi_tl(control_reg, 0);
for (int i = 0; i < NUM_PREGS; i++) {
tcg_gen_deposit_tl(control_reg, control_reg, hex_pred[i], i * 8, 8);
}
}
/*
* Certain control registers require special handling on read
* HEX_REG_P3_0 aliased to the predicate registers
* -> concat the 4 predicate registers together
* HEX_REG_PC actual value stored in DisasContext
* -> assign from ctx->base.pc_next
* HEX_REG_QEMU_*_CNT changes in current TB in DisasContext
* -> add current TB changes to existing reg value
*/
static inline void gen_read_ctrl_reg(DisasContext *ctx, const int reg_num,
TCGv dest)
{
if (reg_num == HEX_REG_P3_0) {
gen_read_p3_0(dest);
} else if (reg_num == HEX_REG_PC) {
tcg_gen_movi_tl(dest, ctx->base.pc_next);
} else if (reg_num == HEX_REG_QEMU_PKT_CNT) {
tcg_gen_addi_tl(dest, hex_gpr[HEX_REG_QEMU_PKT_CNT],
ctx->num_packets);
} else if (reg_num == HEX_REG_QEMU_INSN_CNT) {
tcg_gen_addi_tl(dest, hex_gpr[HEX_REG_QEMU_INSN_CNT],
ctx->num_insns);
} else {
tcg_gen_mov_tl(dest, hex_gpr[reg_num]);
}
}
static inline void gen_read_ctrl_reg_pair(DisasContext *ctx, const int reg_num,
TCGv_i64 dest)
{
if (reg_num == HEX_REG_P3_0) {
TCGv p3_0 = tcg_temp_new();
gen_read_p3_0(p3_0);
tcg_gen_concat_i32_i64(dest, p3_0, hex_gpr[reg_num + 1]);
tcg_temp_free(p3_0);
} else if (reg_num == HEX_REG_PC - 1) {
TCGv pc = tcg_const_tl(ctx->base.pc_next);
tcg_gen_concat_i32_i64(dest, hex_gpr[reg_num], pc);
tcg_temp_free(pc);
} else if (reg_num == HEX_REG_QEMU_PKT_CNT) {
TCGv pkt_cnt = tcg_temp_new();
TCGv insn_cnt = tcg_temp_new();
tcg_gen_addi_tl(pkt_cnt, hex_gpr[HEX_REG_QEMU_PKT_CNT],
ctx->num_packets);
tcg_gen_addi_tl(insn_cnt, hex_gpr[HEX_REG_QEMU_INSN_CNT],
ctx->num_insns);
tcg_gen_concat_i32_i64(dest, pkt_cnt, insn_cnt);
tcg_temp_free(pkt_cnt);
tcg_temp_free(insn_cnt);
} else {
tcg_gen_concat_i32_i64(dest,
hex_gpr[reg_num],
hex_gpr[reg_num + 1]);
}
}
static inline void gen_write_p3_0(TCGv control_reg)
{
for (int i = 0; i < NUM_PREGS; i++) {
tcg_gen_extract_tl(hex_pred[i], control_reg, i * 8, 8);
}
}
/*
* Certain control registers require special handling on write
* HEX_REG_P3_0 aliased to the predicate registers
* -> break the value across 4 predicate registers
* HEX_REG_QEMU_*_CNT changes in current TB in DisasContext
* -> clear the changes
*/
static inline void gen_write_ctrl_reg(DisasContext *ctx, int reg_num,
TCGv val)
{
if (reg_num == HEX_REG_P3_0) {
gen_write_p3_0(val);
} else {
gen_log_reg_write(reg_num, val);
ctx_log_reg_write(ctx, reg_num);
if (reg_num == HEX_REG_QEMU_PKT_CNT) {
ctx->num_packets = 0;
}
if (reg_num == HEX_REG_QEMU_INSN_CNT) {
ctx->num_insns = 0;
}
}
}
static inline void gen_write_ctrl_reg_pair(DisasContext *ctx, int reg_num,
TCGv_i64 val)
{
if (reg_num == HEX_REG_P3_0) {
TCGv val32 = tcg_temp_new();
tcg_gen_extrl_i64_i32(val32, val);
gen_write_p3_0(val32);
tcg_gen_extrh_i64_i32(val32, val);
gen_log_reg_write(reg_num + 1, val32);
tcg_temp_free(val32);
ctx_log_reg_write(ctx, reg_num + 1);
} else {
gen_log_reg_write_pair(reg_num, val);
ctx_log_reg_write_pair(ctx, reg_num);
if (reg_num == HEX_REG_QEMU_PKT_CNT) {
ctx->num_packets = 0;
ctx->num_insns = 0;
}
}
}
static inline void gen_load_locked4u(TCGv dest, TCGv vaddr, int mem_index)
{
tcg_gen_qemu_ld32u(dest, vaddr, mem_index);
tcg_gen_mov_tl(hex_llsc_addr, vaddr);
tcg_gen_mov_tl(hex_llsc_val, dest);
}
static inline void gen_load_locked8u(TCGv_i64 dest, TCGv vaddr, int mem_index)
{
tcg_gen_qemu_ld64(dest, vaddr, mem_index);
tcg_gen_mov_tl(hex_llsc_addr, vaddr);
tcg_gen_mov_i64(hex_llsc_val_i64, dest);
}
static inline void gen_store_conditional4(CPUHexagonState *env,
DisasContext *ctx, int prednum,
TCGv pred, TCGv vaddr, TCGv src)
{
TCGLabel *fail = gen_new_label();
TCGLabel *done = gen_new_label();
TCGv one, zero, tmp;
tcg_gen_brcond_tl(TCG_COND_NE, vaddr, hex_llsc_addr, fail);
one = tcg_const_tl(0xff);
zero = tcg_const_tl(0);
tmp = tcg_temp_new();
tcg_gen_atomic_cmpxchg_tl(tmp, hex_llsc_addr, hex_llsc_val, src,
ctx->mem_idx, MO_32);
tcg_gen_movcond_tl(TCG_COND_EQ, hex_pred[prednum], tmp, hex_llsc_val,
one, zero);
tcg_temp_free(one);
tcg_temp_free(zero);
tcg_temp_free(tmp);
tcg_gen_br(done);
gen_set_label(fail);
tcg_gen_movi_tl(pred, 0);
gen_set_label(done);
tcg_gen_movi_tl(hex_llsc_addr, ~0);
}
static inline void gen_store_conditional8(CPUHexagonState *env,
DisasContext *ctx, int prednum,
TCGv pred, TCGv vaddr, TCGv_i64 src)
{
TCGLabel *fail = gen_new_label();
TCGLabel *done = gen_new_label();
TCGv_i64 one, zero, tmp;
tcg_gen_brcond_tl(TCG_COND_NE, vaddr, hex_llsc_addr, fail);
one = tcg_const_i64(0xff);
zero = tcg_const_i64(0);
tmp = tcg_temp_new_i64();
tcg_gen_atomic_cmpxchg_i64(tmp, hex_llsc_addr, hex_llsc_val_i64, src,
ctx->mem_idx, MO_64);
tcg_gen_movcond_i64(TCG_COND_EQ, tmp, tmp, hex_llsc_val_i64,
one, zero);
tcg_gen_extrl_i64_i32(hex_pred[prednum], tmp);
tcg_temp_free_i64(one);
tcg_temp_free_i64(zero);
tcg_temp_free_i64(tmp);
tcg_gen_br(done);
gen_set_label(fail);
tcg_gen_movi_tl(pred, 0);
gen_set_label(done);
tcg_gen_movi_tl(hex_llsc_addr, ~0);
}
#include "tcg_funcs_generated.c.inc"
#include "tcg_func_table_generated.c.inc"
