| /* |
| * Copyright(c) 2019-2023 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 "cpu.h" |
| #include "tcg/tcg-op.h" |
| #include "tcg/tcg-op-gvec.h" |
| #include "exec/cpu_ldst.h" |
| #include "exec/log.h" |
| #include "internal.h" |
| #include "attribs.h" |
| #include "insn.h" |
| #include "decode.h" |
| #include "translate.h" |
| #include "printinsn.h" |
| |
| #include "analyze_funcs_generated.c.inc" |
| |
| typedef void (*AnalyzeInsn)(DisasContext *ctx); |
| static const AnalyzeInsn opcode_analyze[XX_LAST_OPCODE] = { |
| #define OPCODE(X) [X] = analyze_##X |
| #include "opcodes_def_generated.h.inc" |
| #undef OPCODE |
| }; |
| |
| TCGv hex_gpr[TOTAL_PER_THREAD_REGS]; |
| TCGv hex_pred[NUM_PREGS]; |
| TCGv hex_this_PC; |
| TCGv hex_slot_cancelled; |
| TCGv hex_branch_taken; |
| TCGv hex_new_value[TOTAL_PER_THREAD_REGS]; |
| TCGv hex_reg_written[TOTAL_PER_THREAD_REGS]; |
| TCGv hex_new_pred_value[NUM_PREGS]; |
| TCGv hex_pred_written; |
| TCGv hex_store_addr[STORES_MAX]; |
| TCGv hex_store_width[STORES_MAX]; |
| TCGv hex_store_val32[STORES_MAX]; |
| TCGv_i64 hex_store_val64[STORES_MAX]; |
| TCGv hex_pkt_has_store_s1; |
| TCGv hex_dczero_addr; |
| TCGv hex_llsc_addr; |
| TCGv hex_llsc_val; |
| TCGv_i64 hex_llsc_val_i64; |
| TCGv hex_vstore_addr[VSTORES_MAX]; |
| TCGv hex_vstore_size[VSTORES_MAX]; |
| TCGv hex_vstore_pending[VSTORES_MAX]; |
| |
| static const char * const hexagon_prednames[] = { |
| "p0", "p1", "p2", "p3" |
| }; |
| |
| intptr_t ctx_future_vreg_off(DisasContext *ctx, int regnum, |
| int num, bool alloc_ok) |
| { |
| intptr_t offset; |
| |
| /* See if it is already allocated */ |
| for (int i = 0; i < ctx->future_vregs_idx; i++) { |
| if (ctx->future_vregs_num[i] == regnum) { |
| return offsetof(CPUHexagonState, future_VRegs[i]); |
| } |
| } |
| |
| g_assert(alloc_ok); |
| offset = offsetof(CPUHexagonState, future_VRegs[ctx->future_vregs_idx]); |
| for (int i = 0; i < num; i++) { |
| ctx->future_vregs_num[ctx->future_vregs_idx + i] = regnum++; |
| } |
| ctx->future_vregs_idx += num; |
| g_assert(ctx->future_vregs_idx <= VECTOR_TEMPS_MAX); |
| return offset; |
| } |
| |
| intptr_t ctx_tmp_vreg_off(DisasContext *ctx, int regnum, |
| int num, bool alloc_ok) |
| { |
| intptr_t offset; |
| |
| /* See if it is already allocated */ |
| for (int i = 0; i < ctx->tmp_vregs_idx; i++) { |
| if (ctx->tmp_vregs_num[i] == regnum) { |
| return offsetof(CPUHexagonState, tmp_VRegs[i]); |
| } |
| } |
| |
| g_assert(alloc_ok); |
| offset = offsetof(CPUHexagonState, tmp_VRegs[ctx->tmp_vregs_idx]); |
| for (int i = 0; i < num; i++) { |
| ctx->tmp_vregs_num[ctx->tmp_vregs_idx + i] = regnum++; |
| } |
| ctx->tmp_vregs_idx += num; |
| g_assert(ctx->tmp_vregs_idx <= VECTOR_TEMPS_MAX); |
| return offset; |
| } |
| |
| static void gen_exception_raw(int excp) |
| { |
| gen_helper_raise_exception(cpu_env, tcg_constant_i32(excp)); |
| } |
| |
| static void gen_exec_counters(DisasContext *ctx) |
| { |
| tcg_gen_addi_tl(hex_gpr[HEX_REG_QEMU_PKT_CNT], |
| hex_gpr[HEX_REG_QEMU_PKT_CNT], ctx->num_packets); |
| tcg_gen_addi_tl(hex_gpr[HEX_REG_QEMU_INSN_CNT], |
| hex_gpr[HEX_REG_QEMU_INSN_CNT], ctx->num_insns); |
| tcg_gen_addi_tl(hex_gpr[HEX_REG_QEMU_HVX_CNT], |
| hex_gpr[HEX_REG_QEMU_HVX_CNT], ctx->num_hvx_insns); |
| } |
| |
| static bool use_goto_tb(DisasContext *ctx, target_ulong dest) |
| { |
| return translator_use_goto_tb(&ctx->base, dest); |
| } |
| |
| static void gen_goto_tb(DisasContext *ctx, int idx, target_ulong dest, bool |
| move_to_pc) |
| { |
| if (use_goto_tb(ctx, dest)) { |
| tcg_gen_goto_tb(idx); |
| if (move_to_pc) { |
| tcg_gen_movi_tl(hex_gpr[HEX_REG_PC], dest); |
| } |
| tcg_gen_exit_tb(ctx->base.tb, idx); |
| } else { |
| if (move_to_pc) { |
| tcg_gen_movi_tl(hex_gpr[HEX_REG_PC], dest); |
| } |
| tcg_gen_lookup_and_goto_ptr(); |
| } |
| } |
| |
| static void gen_end_tb(DisasContext *ctx) |
| { |
| Packet *pkt = ctx->pkt; |
| |
| gen_exec_counters(ctx); |
| |
| if (ctx->branch_cond != TCG_COND_NEVER) { |
| if (ctx->branch_cond != TCG_COND_ALWAYS) { |
| TCGLabel *skip = gen_new_label(); |
| tcg_gen_brcondi_tl(ctx->branch_cond, hex_branch_taken, 0, skip); |
| gen_goto_tb(ctx, 0, ctx->branch_dest, true); |
| gen_set_label(skip); |
| gen_goto_tb(ctx, 1, ctx->next_PC, false); |
| } else { |
| gen_goto_tb(ctx, 0, ctx->branch_dest, true); |
| } |
| } else if (ctx->is_tight_loop && |
| pkt->insn[pkt->num_insns - 1].opcode == J2_endloop0) { |
| /* |
| * When we're in a tight loop, we defer the endloop0 processing |
| * to take advantage of direct block chaining |
| */ |
| TCGLabel *skip = gen_new_label(); |
| tcg_gen_brcondi_tl(TCG_COND_LEU, hex_gpr[HEX_REG_LC0], 1, skip); |
| tcg_gen_subi_tl(hex_gpr[HEX_REG_LC0], hex_gpr[HEX_REG_LC0], 1); |
| gen_goto_tb(ctx, 0, ctx->base.tb->pc, true); |
| gen_set_label(skip); |
| gen_goto_tb(ctx, 1, ctx->next_PC, false); |
| } else { |
| tcg_gen_lookup_and_goto_ptr(); |
| } |
| |
| ctx->base.is_jmp = DISAS_NORETURN; |
| } |
| |
| static void gen_exception_end_tb(DisasContext *ctx, int excp) |
| { |
| gen_exec_counters(ctx); |
| tcg_gen_movi_tl(hex_gpr[HEX_REG_PC], ctx->next_PC); |
| gen_exception_raw(excp); |
| ctx->base.is_jmp = DISAS_NORETURN; |
| |
| } |
| |
| #define PACKET_BUFFER_LEN 1028 |
| static void print_pkt(Packet *pkt) |
| { |
| GString *buf = g_string_sized_new(PACKET_BUFFER_LEN); |
| snprint_a_pkt_debug(buf, pkt); |
| HEX_DEBUG_LOG("%s", buf->str); |
| g_string_free(buf, true); |
| } |
| #define HEX_DEBUG_PRINT_PKT(pkt) \ |
| do { \ |
| if (HEX_DEBUG) { \ |
| print_pkt(pkt); \ |
| } \ |
| } while (0) |
| |
| static int read_packet_words(CPUHexagonState *env, DisasContext *ctx, |
| uint32_t words[]) |
| { |
| bool found_end = false; |
| int nwords, max_words; |
| |
| memset(words, 0, PACKET_WORDS_MAX * sizeof(uint32_t)); |
| for (nwords = 0; !found_end && nwords < PACKET_WORDS_MAX; nwords++) { |
| words[nwords] = |
| translator_ldl(env, &ctx->base, |
| ctx->base.pc_next + nwords * sizeof(uint32_t)); |
| found_end = is_packet_end(words[nwords]); |
| } |
| if (!found_end) { |
| /* Read too many words without finding the end */ |
| return 0; |
| } |
| |
| /* Check for page boundary crossing */ |
| max_words = -(ctx->base.pc_next | TARGET_PAGE_MASK) / sizeof(uint32_t); |
| if (nwords > max_words) { |
| /* We can only cross a page boundary at the beginning of a TB */ |
| g_assert(ctx->base.num_insns == 1); |
| } |
| |
| HEX_DEBUG_LOG("decode_packet: pc = 0x%x\n", ctx->base.pc_next); |
| HEX_DEBUG_LOG(" words = { "); |
| for (int i = 0; i < nwords; i++) { |
| HEX_DEBUG_LOG("0x%x, ", words[i]); |
| } |
| HEX_DEBUG_LOG("}\n"); |
| |
| return nwords; |
| } |
| |
| static bool check_for_attrib(Packet *pkt, int attrib) |
| { |
| for (int i = 0; i < pkt->num_insns; i++) { |
| if (GET_ATTRIB(pkt->insn[i].opcode, attrib)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| static bool need_slot_cancelled(Packet *pkt) |
| { |
| /* We only need slot_cancelled for conditional store instructions */ |
| for (int i = 0; i < pkt->num_insns; i++) { |
| uint16_t opcode = pkt->insn[i].opcode; |
| if (GET_ATTRIB(opcode, A_CONDEXEC) && |
| GET_ATTRIB(opcode, A_SCALAR_STORE)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| static bool need_pred_written(Packet *pkt) |
| { |
| return check_for_attrib(pkt, A_WRITES_PRED_REG); |
| } |
| |
| static bool need_next_PC(DisasContext *ctx) |
| { |
| Packet *pkt = ctx->pkt; |
| |
| /* Check for conditional control flow or HW loop end */ |
| for (int i = 0; i < pkt->num_insns; i++) { |
| uint16_t opcode = pkt->insn[i].opcode; |
| if (GET_ATTRIB(opcode, A_CONDEXEC) && GET_ATTRIB(opcode, A_COF)) { |
| return true; |
| } |
| if (GET_ATTRIB(opcode, A_HWLOOP0_END) || |
| GET_ATTRIB(opcode, A_HWLOOP1_END)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /* |
| * The opcode_analyze functions mark most of the writes in a packet |
| * However, there are some implicit writes marked as attributes |
| * of the applicable instructions. |
| */ |
| static void mark_implicit_reg_write(DisasContext *ctx, int attrib, int rnum) |
| { |
| uint16_t opcode = ctx->insn->opcode; |
| if (GET_ATTRIB(opcode, attrib)) { |
| /* |
| * USR is used to set overflow and FP exceptions, |
| * so treat it as conditional |
| */ |
| bool is_predicated = GET_ATTRIB(opcode, A_CONDEXEC) || |
| rnum == HEX_REG_USR; |
| |
| /* LC0/LC1 is conditionally written by endloop instructions */ |
| if ((rnum == HEX_REG_LC0 || rnum == HEX_REG_LC1) && |
| (opcode == J2_endloop0 || |
| opcode == J2_endloop1 || |
| opcode == J2_endloop01)) { |
| is_predicated = true; |
| } |
| |
| ctx_log_reg_write(ctx, rnum, is_predicated); |
| } |
| } |
| |
| static void mark_implicit_reg_writes(DisasContext *ctx) |
| { |
| mark_implicit_reg_write(ctx, A_IMPLICIT_WRITES_FP, HEX_REG_FP); |
| mark_implicit_reg_write(ctx, A_IMPLICIT_WRITES_SP, HEX_REG_SP); |
| mark_implicit_reg_write(ctx, A_IMPLICIT_WRITES_LR, HEX_REG_LR); |
| mark_implicit_reg_write(ctx, A_IMPLICIT_WRITES_LC0, HEX_REG_LC0); |
| mark_implicit_reg_write(ctx, A_IMPLICIT_WRITES_SA0, HEX_REG_SA0); |
| mark_implicit_reg_write(ctx, A_IMPLICIT_WRITES_LC1, HEX_REG_LC1); |
| mark_implicit_reg_write(ctx, A_IMPLICIT_WRITES_SA1, HEX_REG_SA1); |
| mark_implicit_reg_write(ctx, A_IMPLICIT_WRITES_USR, HEX_REG_USR); |
| mark_implicit_reg_write(ctx, A_FPOP, HEX_REG_USR); |
| } |
| |
| static void mark_implicit_pred_write(DisasContext *ctx, int attrib, int pnum) |
| { |
| if (GET_ATTRIB(ctx->insn->opcode, attrib)) { |
| ctx_log_pred_write(ctx, pnum); |
| } |
| } |
| |
| static void mark_implicit_pred_writes(DisasContext *ctx) |
| { |
| mark_implicit_pred_write(ctx, A_IMPLICIT_WRITES_P0, 0); |
| mark_implicit_pred_write(ctx, A_IMPLICIT_WRITES_P1, 1); |
| mark_implicit_pred_write(ctx, A_IMPLICIT_WRITES_P2, 2); |
| mark_implicit_pred_write(ctx, A_IMPLICIT_WRITES_P3, 3); |
| } |
| |
| static void analyze_packet(DisasContext *ctx) |
| { |
| Packet *pkt = ctx->pkt; |
| ctx->need_pkt_has_store_s1 = false; |
| for (int i = 0; i < pkt->num_insns; i++) { |
| Insn *insn = &pkt->insn[i]; |
| ctx->insn = insn; |
| if (opcode_analyze[insn->opcode]) { |
| opcode_analyze[insn->opcode](ctx); |
| } |
| mark_implicit_reg_writes(ctx); |
| mark_implicit_pred_writes(ctx); |
| } |
| } |
| |
| static void gen_start_packet(DisasContext *ctx) |
| { |
| Packet *pkt = ctx->pkt; |
| target_ulong next_PC = ctx->base.pc_next + pkt->encod_pkt_size_in_bytes; |
| int i; |
| |
| /* Clear out the disassembly context */ |
| ctx->next_PC = next_PC; |
| ctx->reg_log_idx = 0; |
| bitmap_zero(ctx->regs_written, TOTAL_PER_THREAD_REGS); |
| bitmap_zero(ctx->predicated_regs, TOTAL_PER_THREAD_REGS); |
| ctx->preg_log_idx = 0; |
| bitmap_zero(ctx->pregs_written, NUM_PREGS); |
| ctx->future_vregs_idx = 0; |
| ctx->tmp_vregs_idx = 0; |
| ctx->vreg_log_idx = 0; |
| bitmap_zero(ctx->vregs_updated_tmp, NUM_VREGS); |
| bitmap_zero(ctx->vregs_updated, NUM_VREGS); |
| bitmap_zero(ctx->vregs_select, NUM_VREGS); |
| bitmap_zero(ctx->predicated_future_vregs, NUM_VREGS); |
| bitmap_zero(ctx->predicated_tmp_vregs, NUM_VREGS); |
| ctx->qreg_log_idx = 0; |
| for (i = 0; i < STORES_MAX; i++) { |
| ctx->store_width[i] = 0; |
| } |
| ctx->s1_store_processed = false; |
| ctx->pre_commit = true; |
| |
| analyze_packet(ctx); |
| |
| if (ctx->need_pkt_has_store_s1) { |
| tcg_gen_movi_tl(hex_pkt_has_store_s1, pkt->pkt_has_store_s1); |
| } |
| |
| /* |
| * pregs_written is used both in the analyze phase as well as the code |
| * gen phase, so clear it again. |
| */ |
| bitmap_zero(ctx->pregs_written, NUM_PREGS); |
| |
| if (HEX_DEBUG) { |
| /* Handy place to set a breakpoint before the packet executes */ |
| gen_helper_debug_start_packet(cpu_env); |
| tcg_gen_movi_tl(hex_this_PC, ctx->base.pc_next); |
| } |
| |
| /* Initialize the runtime state for packet semantics */ |
| if (need_slot_cancelled(pkt)) { |
| tcg_gen_movi_tl(hex_slot_cancelled, 0); |
| } |
| if (pkt->pkt_has_cof) { |
| if (pkt->pkt_has_multi_cof) { |
| tcg_gen_movi_tl(hex_branch_taken, 0); |
| } |
| if (need_next_PC(ctx)) { |
| tcg_gen_movi_tl(hex_gpr[HEX_REG_PC], next_PC); |
| } |
| } |
| if (need_pred_written(pkt)) { |
| tcg_gen_movi_tl(hex_pred_written, 0); |
| } |
| |
| /* Preload the predicated registers into hex_new_value[i] */ |
| if (!bitmap_empty(ctx->predicated_regs, TOTAL_PER_THREAD_REGS)) { |
| int i = find_first_bit(ctx->predicated_regs, TOTAL_PER_THREAD_REGS); |
| while (i < TOTAL_PER_THREAD_REGS) { |
| tcg_gen_mov_tl(hex_new_value[i], hex_gpr[i]); |
| i = find_next_bit(ctx->predicated_regs, TOTAL_PER_THREAD_REGS, |
| i + 1); |
| } |
| } |
| |
| /* Preload the predicated HVX registers into future_VRegs and tmp_VRegs */ |
| if (!bitmap_empty(ctx->predicated_future_vregs, NUM_VREGS)) { |
| int i = find_first_bit(ctx->predicated_future_vregs, NUM_VREGS); |
| while (i < NUM_VREGS) { |
| const intptr_t VdV_off = |
| ctx_future_vreg_off(ctx, i, 1, true); |
| intptr_t src_off = offsetof(CPUHexagonState, VRegs[i]); |
| tcg_gen_gvec_mov(MO_64, VdV_off, |
| src_off, |
| sizeof(MMVector), |
| sizeof(MMVector)); |
| i = find_next_bit(ctx->predicated_future_vregs, NUM_VREGS, i + 1); |
| } |
| } |
| if (!bitmap_empty(ctx->predicated_tmp_vregs, NUM_VREGS)) { |
| int i = find_first_bit(ctx->predicated_tmp_vregs, NUM_VREGS); |
| while (i < NUM_VREGS) { |
| const intptr_t VdV_off = |
| ctx_tmp_vreg_off(ctx, i, 1, true); |
| intptr_t src_off = offsetof(CPUHexagonState, VRegs[i]); |
| tcg_gen_gvec_mov(MO_64, VdV_off, |
| src_off, |
| sizeof(MMVector), |
| sizeof(MMVector)); |
| i = find_next_bit(ctx->predicated_tmp_vregs, NUM_VREGS, i + 1); |
| } |
| } |
| } |
| |
| bool is_gather_store_insn(DisasContext *ctx) |
| { |
| Packet *pkt = ctx->pkt; |
| Insn *insn = ctx->insn; |
| if (GET_ATTRIB(insn->opcode, A_CVI_NEW) && |
| insn->new_value_producer_slot == 1) { |
| /* Look for gather instruction */ |
| for (int i = 0; i < pkt->num_insns; i++) { |
| Insn *in = &pkt->insn[i]; |
| if (GET_ATTRIB(in->opcode, A_CVI_GATHER) && in->slot == 1) { |
| return true; |
| } |
| } |
| } |
| return false; |
| } |
| |
| static void mark_store_width(DisasContext *ctx) |
| { |
| uint16_t opcode = ctx->insn->opcode; |
| uint32_t slot = ctx->insn->slot; |
| uint8_t width = 0; |
| |
| if (GET_ATTRIB(opcode, A_SCALAR_STORE)) { |
| if (GET_ATTRIB(opcode, A_MEMSIZE_1B)) { |
| width |= 1; |
| } |
| if (GET_ATTRIB(opcode, A_MEMSIZE_2B)) { |
| width |= 2; |
| } |
| if (GET_ATTRIB(opcode, A_MEMSIZE_4B)) { |
| width |= 4; |
| } |
| if (GET_ATTRIB(opcode, A_MEMSIZE_8B)) { |
| width |= 8; |
| } |
| tcg_debug_assert(is_power_of_2(width)); |
| ctx->store_width[slot] = width; |
| } |
| } |
| |
| static void gen_insn(DisasContext *ctx) |
| { |
| if (ctx->insn->generate) { |
| ctx->insn->generate(ctx); |
| mark_store_width(ctx); |
| } else { |
| gen_exception_end_tb(ctx, HEX_EXCP_INVALID_OPCODE); |
| } |
| } |
| |
| /* |
| * Helpers for generating the packet commit |
| */ |
| static void gen_reg_writes(DisasContext *ctx) |
| { |
| int i; |
| |
| for (i = 0; i < ctx->reg_log_idx; i++) { |
| int reg_num = ctx->reg_log[i]; |
| |
| tcg_gen_mov_tl(hex_gpr[reg_num], hex_new_value[reg_num]); |
| |
| /* |
| * ctx->is_tight_loop is set when SA0 points to the beginning of the TB. |
| * If we write to SA0, we have to turn off tight loop handling. |
| */ |
| if (reg_num == HEX_REG_SA0) { |
| ctx->is_tight_loop = false; |
| } |
| } |
| } |
| |
| static void gen_pred_writes(DisasContext *ctx) |
| { |
| int i; |
| |
| /* Early exit if the log is empty */ |
| if (!ctx->preg_log_idx) { |
| return; |
| } |
| |
| /* |
| * Only endloop instructions will conditionally |
| * write a predicate. If there are no endloop |
| * instructions, we can use the non-conditional |
| * write of the predicates. |
| */ |
| if (ctx->pkt->pkt_has_endloop) { |
| TCGv zero = tcg_constant_tl(0); |
| TCGv pred_written = tcg_temp_new(); |
| for (i = 0; i < ctx->preg_log_idx; i++) { |
| int pred_num = ctx->preg_log[i]; |
| |
| tcg_gen_andi_tl(pred_written, hex_pred_written, 1 << pred_num); |
| tcg_gen_movcond_tl(TCG_COND_NE, hex_pred[pred_num], |
| pred_written, zero, |
| hex_new_pred_value[pred_num], |
| hex_pred[pred_num]); |
| } |
| } else { |
| for (i = 0; i < ctx->preg_log_idx; i++) { |
| int pred_num = ctx->preg_log[i]; |
| tcg_gen_mov_tl(hex_pred[pred_num], hex_new_pred_value[pred_num]); |
| if (HEX_DEBUG) { |
| /* Do this so HELPER(debug_commit_end) will know */ |
| tcg_gen_ori_tl(hex_pred_written, hex_pred_written, |
| 1 << pred_num); |
| } |
| } |
| } |
| } |
| |
| static void gen_check_store_width(DisasContext *ctx, int slot_num) |
| { |
| if (HEX_DEBUG) { |
| TCGv slot = tcg_constant_tl(slot_num); |
| TCGv check = tcg_constant_tl(ctx->store_width[slot_num]); |
| gen_helper_debug_check_store_width(cpu_env, slot, check); |
| } |
| } |
| |
| static bool slot_is_predicated(Packet *pkt, int slot_num) |
| { |
| for (int i = 0; i < pkt->num_insns; i++) { |
| if (pkt->insn[i].slot == slot_num) { |
| return GET_ATTRIB(pkt->insn[i].opcode, A_CONDEXEC); |
| } |
| } |
| /* If we get to here, we didn't find an instruction in the requested slot */ |
| g_assert_not_reached(); |
| } |
| |
| void process_store(DisasContext *ctx, int slot_num) |
| { |
| bool is_predicated = slot_is_predicated(ctx->pkt, slot_num); |
| TCGLabel *label_end = NULL; |
| |
| /* |
| * We may have already processed this store |
| * See CHECK_NOSHUF in macros.h |
| */ |
| if (slot_num == 1 && ctx->s1_store_processed) { |
| return; |
| } |
| ctx->s1_store_processed = true; |
| |
| if (is_predicated) { |
| TCGv cancelled = tcg_temp_new(); |
| label_end = gen_new_label(); |
| |
| /* Don't do anything if the slot was cancelled */ |
| tcg_gen_extract_tl(cancelled, hex_slot_cancelled, slot_num, 1); |
| tcg_gen_brcondi_tl(TCG_COND_NE, cancelled, 0, label_end); |
| } |
| { |
| TCGv address = tcg_temp_new(); |
| tcg_gen_mov_tl(address, hex_store_addr[slot_num]); |
| |
| /* |
| * If we know the width from the DisasContext, we can |
| * generate much cleaner code. |
| * Unfortunately, not all instructions execute the fSTORE |
| * macro during code generation. Anything that uses the |
| * generic helper will have this problem. Instructions |
| * that use fWRAP to generate proper TCG code will be OK. |
| */ |
| switch (ctx->store_width[slot_num]) { |
| case 1: |
| gen_check_store_width(ctx, slot_num); |
| tcg_gen_qemu_st_tl(hex_store_val32[slot_num], |
| hex_store_addr[slot_num], |
| ctx->mem_idx, MO_UB); |
| break; |
| case 2: |
| gen_check_store_width(ctx, slot_num); |
| tcg_gen_qemu_st_tl(hex_store_val32[slot_num], |
| hex_store_addr[slot_num], |
| ctx->mem_idx, MO_TEUW); |
| break; |
| case 4: |
| gen_check_store_width(ctx, slot_num); |
| tcg_gen_qemu_st_tl(hex_store_val32[slot_num], |
| hex_store_addr[slot_num], |
| ctx->mem_idx, MO_TEUL); |
| break; |
| case 8: |
| gen_check_store_width(ctx, slot_num); |
| tcg_gen_qemu_st_i64(hex_store_val64[slot_num], |
| hex_store_addr[slot_num], |
| ctx->mem_idx, MO_TEUQ); |
| break; |
| default: |
| { |
| /* |
| * If we get to here, we don't know the width at |
| * TCG generation time, we'll use a helper to |
| * avoid branching based on the width at runtime. |
| */ |
| TCGv slot = tcg_constant_tl(slot_num); |
| gen_helper_commit_store(cpu_env, slot); |
| } |
| } |
| } |
| if (is_predicated) { |
| gen_set_label(label_end); |
| } |
| } |
| |
| static void process_store_log(DisasContext *ctx) |
| { |
| /* |
| * When a packet has two stores, the hardware processes |
| * slot 1 and then slot 0. This will be important when |
| * the memory accesses overlap. |
| */ |
| Packet *pkt = ctx->pkt; |
| if (pkt->pkt_has_store_s1) { |
| g_assert(!pkt->pkt_has_dczeroa); |
| process_store(ctx, 1); |
| } |
| if (pkt->pkt_has_store_s0) { |
| g_assert(!pkt->pkt_has_dczeroa); |
| process_store(ctx, 0); |
| } |
| } |
| |
| /* Zero out a 32-bit cache line */ |
| static void process_dczeroa(DisasContext *ctx) |
| { |
| if (ctx->pkt->pkt_has_dczeroa) { |
| /* Store 32 bytes of zero starting at (addr & ~0x1f) */ |
| TCGv addr = tcg_temp_new(); |
| TCGv_i64 zero = tcg_constant_i64(0); |
| |
| tcg_gen_andi_tl(addr, hex_dczero_addr, ~0x1f); |
| tcg_gen_qemu_st_i64(zero, addr, ctx->mem_idx, MO_UQ); |
| tcg_gen_addi_tl(addr, addr, 8); |
| tcg_gen_qemu_st_i64(zero, addr, ctx->mem_idx, MO_UQ); |
| tcg_gen_addi_tl(addr, addr, 8); |
| tcg_gen_qemu_st_i64(zero, addr, ctx->mem_idx, MO_UQ); |
| tcg_gen_addi_tl(addr, addr, 8); |
| tcg_gen_qemu_st_i64(zero, addr, ctx->mem_idx, MO_UQ); |
| } |
| } |
| |
| static bool pkt_has_hvx_store(Packet *pkt) |
| { |
| int i; |
| for (i = 0; i < pkt->num_insns; i++) { |
| int opcode = pkt->insn[i].opcode; |
| if (GET_ATTRIB(opcode, A_CVI) && GET_ATTRIB(opcode, A_STORE)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| static void gen_commit_hvx(DisasContext *ctx) |
| { |
| int i; |
| |
| /* |
| * for (i = 0; i < ctx->vreg_log_idx; i++) { |
| * int rnum = ctx->vreg_log[i]; |
| * env->VRegs[rnum] = env->future_VRegs[rnum]; |
| * } |
| */ |
| for (i = 0; i < ctx->vreg_log_idx; i++) { |
| int rnum = ctx->vreg_log[i]; |
| intptr_t dstoff = offsetof(CPUHexagonState, VRegs[rnum]); |
| intptr_t srcoff = ctx_future_vreg_off(ctx, rnum, 1, false); |
| size_t size = sizeof(MMVector); |
| |
| tcg_gen_gvec_mov(MO_64, dstoff, srcoff, size, size); |
| } |
| |
| /* |
| * for (i = 0; i < ctx->qreg_log_idx; i++) { |
| * int rnum = ctx->qreg_log[i]; |
| * env->QRegs[rnum] = env->future_QRegs[rnum]; |
| * } |
| */ |
| for (i = 0; i < ctx->qreg_log_idx; i++) { |
| int rnum = ctx->qreg_log[i]; |
| intptr_t dstoff = offsetof(CPUHexagonState, QRegs[rnum]); |
| intptr_t srcoff = offsetof(CPUHexagonState, future_QRegs[rnum]); |
| size_t size = sizeof(MMQReg); |
| |
| tcg_gen_gvec_mov(MO_64, dstoff, srcoff, size, size); |
| } |
| |
| if (pkt_has_hvx_store(ctx->pkt)) { |
| gen_helper_commit_hvx_stores(cpu_env); |
| } |
| } |
| |
| static void update_exec_counters(DisasContext *ctx) |
| { |
| Packet *pkt = ctx->pkt; |
| int num_insns = pkt->num_insns; |
| int num_real_insns = 0; |
| int num_hvx_insns = 0; |
| |
| for (int i = 0; i < num_insns; i++) { |
| if (!pkt->insn[i].is_endloop && |
| !pkt->insn[i].part1 && |
| !GET_ATTRIB(pkt->insn[i].opcode, A_IT_NOP)) { |
| num_real_insns++; |
| } |
| if (GET_ATTRIB(pkt->insn[i].opcode, A_CVI)) { |
| num_hvx_insns++; |
| } |
| } |
| |
| ctx->num_packets++; |
| ctx->num_insns += num_real_insns; |
| ctx->num_hvx_insns += num_hvx_insns; |
| } |
| |
| static void gen_commit_packet(DisasContext *ctx) |
| { |
| /* |
| * If there is more than one store in a packet, make sure they are all OK |
| * before proceeding with the rest of the packet commit. |
| * |
| * dczeroa has to be the only store operation in the packet, so we go |
| * ahead and process that first. |
| * |
| * When there is an HVX store, there can also be a scalar store in either |
| * slot 0 or slot1, so we create a mask for the helper to indicate what |
| * work to do. |
| * |
| * When there are two scalar stores, we probe the one in slot 0. |
| * |
| * Note that we don't call the probe helper for packets with only one |
| * store. Therefore, we call process_store_log before anything else |
| * involved in committing the packet. |
| */ |
| Packet *pkt = ctx->pkt; |
| bool has_store_s0 = pkt->pkt_has_store_s0; |
| bool has_store_s1 = (pkt->pkt_has_store_s1 && !ctx->s1_store_processed); |
| bool has_hvx_store = pkt_has_hvx_store(pkt); |
| if (pkt->pkt_has_dczeroa) { |
| /* |
| * The dczeroa will be the store in slot 0, check that we don't have |
| * a store in slot 1 or an HVX store. |
| */ |
| g_assert(!has_store_s1 && !has_hvx_store); |
| process_dczeroa(ctx); |
| } else if (has_hvx_store) { |
| if (!has_store_s0 && !has_store_s1) { |
| TCGv mem_idx = tcg_constant_tl(ctx->mem_idx); |
| gen_helper_probe_hvx_stores(cpu_env, mem_idx); |
| } else { |
| int mask = 0; |
| |
| if (has_store_s0) { |
| mask = |
| FIELD_DP32(mask, PROBE_PKT_SCALAR_HVX_STORES, HAS_ST0, 1); |
| } |
| if (has_store_s1) { |
| mask = |
| FIELD_DP32(mask, PROBE_PKT_SCALAR_HVX_STORES, HAS_ST1, 1); |
| } |
| if (has_hvx_store) { |
| mask = |
| FIELD_DP32(mask, PROBE_PKT_SCALAR_HVX_STORES, |
| HAS_HVX_STORES, 1); |
| } |
| if (has_store_s0 && slot_is_predicated(pkt, 0)) { |
| mask = |
| FIELD_DP32(mask, PROBE_PKT_SCALAR_HVX_STORES, |
| S0_IS_PRED, 1); |
| } |
| if (has_store_s1 && slot_is_predicated(pkt, 1)) { |
| mask = |
| FIELD_DP32(mask, PROBE_PKT_SCALAR_HVX_STORES, |
| S1_IS_PRED, 1); |
| } |
| mask = FIELD_DP32(mask, PROBE_PKT_SCALAR_HVX_STORES, MMU_IDX, |
| ctx->mem_idx); |
| gen_helper_probe_pkt_scalar_hvx_stores(cpu_env, |
| tcg_constant_tl(mask)); |
| } |
| } else if (has_store_s0 && has_store_s1) { |
| /* |
| * process_store_log will execute the slot 1 store first, |
| * so we only have to probe the store in slot 0 |
| */ |
| int args = 0; |
| args = |
| FIELD_DP32(args, PROBE_PKT_SCALAR_STORE_S0, MMU_IDX, ctx->mem_idx); |
| if (slot_is_predicated(pkt, 0)) { |
| args = |
| FIELD_DP32(args, PROBE_PKT_SCALAR_STORE_S0, IS_PREDICATED, 1); |
| } |
| TCGv args_tcgv = tcg_constant_tl(args); |
| gen_helper_probe_pkt_scalar_store_s0(cpu_env, args_tcgv); |
| } |
| |
| process_store_log(ctx); |
| |
| gen_reg_writes(ctx); |
| gen_pred_writes(ctx); |
| if (pkt->pkt_has_hvx) { |
| gen_commit_hvx(ctx); |
| } |
| update_exec_counters(ctx); |
| if (HEX_DEBUG) { |
| TCGv has_st0 = |
| tcg_constant_tl(pkt->pkt_has_store_s0 && !pkt->pkt_has_dczeroa); |
| TCGv has_st1 = |
| tcg_constant_tl(pkt->pkt_has_store_s1 && !pkt->pkt_has_dczeroa); |
| |
| /* Handy place to set a breakpoint at the end of execution */ |
| gen_helper_debug_commit_end(cpu_env, has_st0, has_st1); |
| } |
| |
| if (pkt->vhist_insn != NULL) { |
| ctx->pre_commit = false; |
| ctx->insn = pkt->vhist_insn; |
| pkt->vhist_insn->generate(ctx); |
| } |
| |
| if (pkt->pkt_has_cof) { |
| gen_end_tb(ctx); |
| } |
| } |
| |
| static void decode_and_translate_packet(CPUHexagonState *env, DisasContext *ctx) |
| { |
| uint32_t words[PACKET_WORDS_MAX]; |
| int nwords; |
| Packet pkt; |
| int i; |
| |
| nwords = read_packet_words(env, ctx, words); |
| if (!nwords) { |
| gen_exception_end_tb(ctx, HEX_EXCP_INVALID_PACKET); |
| return; |
| } |
| |
| if (decode_packet(nwords, words, &pkt, false) > 0) { |
| pkt.pc = ctx->base.pc_next; |
| HEX_DEBUG_PRINT_PKT(&pkt); |
| ctx->pkt = &pkt; |
| gen_start_packet(ctx); |
| for (i = 0; i < pkt.num_insns; i++) { |
| ctx->insn = &pkt.insn[i]; |
| gen_insn(ctx); |
| } |
| gen_commit_packet(ctx); |
| ctx->base.pc_next += pkt.encod_pkt_size_in_bytes; |
| } else { |
| gen_exception_end_tb(ctx, HEX_EXCP_INVALID_PACKET); |
| } |
| } |
| |
| static void hexagon_tr_init_disas_context(DisasContextBase *dcbase, |
| CPUState *cs) |
| { |
| DisasContext *ctx = container_of(dcbase, DisasContext, base); |
| uint32_t hex_flags = dcbase->tb->flags; |
| |
| ctx->mem_idx = MMU_USER_IDX; |
| ctx->num_packets = 0; |
| ctx->num_insns = 0; |
| ctx->num_hvx_insns = 0; |
| ctx->branch_cond = TCG_COND_NEVER; |
| ctx->is_tight_loop = FIELD_EX32(hex_flags, TB_FLAGS, IS_TIGHT_LOOP); |
| } |
| |
| static void hexagon_tr_tb_start(DisasContextBase *db, CPUState *cpu) |
| { |
| } |
| |
| static void hexagon_tr_insn_start(DisasContextBase *dcbase, CPUState *cpu) |
| { |
| DisasContext *ctx = container_of(dcbase, DisasContext, base); |
| |
| tcg_gen_insn_start(ctx->base.pc_next); |
| } |
| |
| static bool pkt_crosses_page(CPUHexagonState *env, DisasContext *ctx) |
| { |
| target_ulong page_start = ctx->base.pc_first & TARGET_PAGE_MASK; |
| bool found_end = false; |
| int nwords; |
| |
| for (nwords = 0; !found_end && nwords < PACKET_WORDS_MAX; nwords++) { |
| uint32_t word = cpu_ldl_code(env, |
| ctx->base.pc_next + nwords * sizeof(uint32_t)); |
| found_end = is_packet_end(word); |
| } |
| uint32_t next_ptr = ctx->base.pc_next + nwords * sizeof(uint32_t); |
| return found_end && next_ptr - page_start >= TARGET_PAGE_SIZE; |
| } |
| |
| static void hexagon_tr_translate_packet(DisasContextBase *dcbase, CPUState *cpu) |
| { |
| DisasContext *ctx = container_of(dcbase, DisasContext, base); |
| CPUHexagonState *env = cpu->env_ptr; |
| |
| decode_and_translate_packet(env, ctx); |
| |
| if (ctx->base.is_jmp == DISAS_NEXT) { |
| target_ulong page_start = ctx->base.pc_first & TARGET_PAGE_MASK; |
| target_ulong bytes_max = PACKET_WORDS_MAX * sizeof(target_ulong); |
| |
| if (ctx->base.pc_next - page_start >= TARGET_PAGE_SIZE || |
| (ctx->base.pc_next - page_start >= TARGET_PAGE_SIZE - bytes_max && |
| pkt_crosses_page(env, ctx))) { |
| ctx->base.is_jmp = DISAS_TOO_MANY; |
| } |
| |
| /* |
| * The CPU log is used to compare against LLDB single stepping, |
| * so end the TLB after every packet. |
| */ |
| HexagonCPU *hex_cpu = env_archcpu(env); |
| if (hex_cpu->lldb_compat && qemu_loglevel_mask(CPU_LOG_TB_CPU)) { |
| ctx->base.is_jmp = DISAS_TOO_MANY; |
| } |
| } |
| } |
| |
| static void hexagon_tr_tb_stop(DisasContextBase *dcbase, CPUState *cpu) |
| { |
| DisasContext *ctx = container_of(dcbase, DisasContext, base); |
| |
| switch (ctx->base.is_jmp) { |
| case DISAS_TOO_MANY: |
| gen_exec_counters(ctx); |
| tcg_gen_movi_tl(hex_gpr[HEX_REG_PC], ctx->base.pc_next); |
| tcg_gen_exit_tb(NULL, 0); |
| break; |
| case DISAS_NORETURN: |
| break; |
| default: |
| g_assert_not_reached(); |
| } |
| } |
| |
| static void hexagon_tr_disas_log(const DisasContextBase *dcbase, |
| CPUState *cpu, FILE *logfile) |
| { |
| fprintf(logfile, "IN: %s\n", lookup_symbol(dcbase->pc_first)); |
| target_disas(logfile, cpu, dcbase->pc_first, dcbase->tb->size); |
| } |
| |
| |
| static const TranslatorOps hexagon_tr_ops = { |
| .init_disas_context = hexagon_tr_init_disas_context, |
| .tb_start = hexagon_tr_tb_start, |
| .insn_start = hexagon_tr_insn_start, |
| .translate_insn = hexagon_tr_translate_packet, |
| .tb_stop = hexagon_tr_tb_stop, |
| .disas_log = hexagon_tr_disas_log, |
| }; |
| |
| void gen_intermediate_code(CPUState *cs, TranslationBlock *tb, int *max_insns, |
| target_ulong pc, void *host_pc) |
| { |
| DisasContext ctx; |
| |
| translator_loop(cs, tb, max_insns, pc, host_pc, |
| &hexagon_tr_ops, &ctx.base); |
| } |
| |
| #define NAME_LEN 64 |
| static char new_value_names[TOTAL_PER_THREAD_REGS][NAME_LEN]; |
| static char reg_written_names[TOTAL_PER_THREAD_REGS][NAME_LEN]; |
| static char new_pred_value_names[NUM_PREGS][NAME_LEN]; |
| static char store_addr_names[STORES_MAX][NAME_LEN]; |
| static char store_width_names[STORES_MAX][NAME_LEN]; |
| static char store_val32_names[STORES_MAX][NAME_LEN]; |
| static char store_val64_names[STORES_MAX][NAME_LEN]; |
| static char vstore_addr_names[VSTORES_MAX][NAME_LEN]; |
| static char vstore_size_names[VSTORES_MAX][NAME_LEN]; |
| static char vstore_pending_names[VSTORES_MAX][NAME_LEN]; |
| |
| void hexagon_translate_init(void) |
| { |
| int i; |
| |
| opcode_init(); |
| |
| for (i = 0; i < TOTAL_PER_THREAD_REGS; i++) { |
| hex_gpr[i] = tcg_global_mem_new(cpu_env, |
| offsetof(CPUHexagonState, gpr[i]), |
| hexagon_regnames[i]); |
| |
| snprintf(new_value_names[i], NAME_LEN, "new_%s", hexagon_regnames[i]); |
| hex_new_value[i] = tcg_global_mem_new(cpu_env, |
| offsetof(CPUHexagonState, new_value[i]), |
| new_value_names[i]); |
| |
| if (HEX_DEBUG) { |
| snprintf(reg_written_names[i], NAME_LEN, "reg_written_%s", |
| hexagon_regnames[i]); |
| hex_reg_written[i] = tcg_global_mem_new(cpu_env, |
| offsetof(CPUHexagonState, reg_written[i]), |
| reg_written_names[i]); |
| } |
| } |
| for (i = 0; i < NUM_PREGS; i++) { |
| hex_pred[i] = tcg_global_mem_new(cpu_env, |
| offsetof(CPUHexagonState, pred[i]), |
| hexagon_prednames[i]); |
| |
| snprintf(new_pred_value_names[i], NAME_LEN, "new_pred_%s", |
| hexagon_prednames[i]); |
| hex_new_pred_value[i] = tcg_global_mem_new(cpu_env, |
| offsetof(CPUHexagonState, new_pred_value[i]), |
| new_pred_value_names[i]); |
| } |
| hex_pred_written = tcg_global_mem_new(cpu_env, |
| offsetof(CPUHexagonState, pred_written), "pred_written"); |
| hex_this_PC = tcg_global_mem_new(cpu_env, |
| offsetof(CPUHexagonState, this_PC), "this_PC"); |
| hex_slot_cancelled = tcg_global_mem_new(cpu_env, |
| offsetof(CPUHexagonState, slot_cancelled), "slot_cancelled"); |
| hex_branch_taken = tcg_global_mem_new(cpu_env, |
| offsetof(CPUHexagonState, branch_taken), "branch_taken"); |
| hex_pkt_has_store_s1 = tcg_global_mem_new(cpu_env, |
| offsetof(CPUHexagonState, pkt_has_store_s1), "pkt_has_store_s1"); |
| hex_dczero_addr = tcg_global_mem_new(cpu_env, |
| offsetof(CPUHexagonState, dczero_addr), "dczero_addr"); |
| hex_llsc_addr = tcg_global_mem_new(cpu_env, |
| offsetof(CPUHexagonState, llsc_addr), "llsc_addr"); |
| hex_llsc_val = tcg_global_mem_new(cpu_env, |
| offsetof(CPUHexagonState, llsc_val), "llsc_val"); |
| hex_llsc_val_i64 = tcg_global_mem_new_i64(cpu_env, |
| offsetof(CPUHexagonState, llsc_val_i64), "llsc_val_i64"); |
| for (i = 0; i < STORES_MAX; i++) { |
| snprintf(store_addr_names[i], NAME_LEN, "store_addr_%d", i); |
| hex_store_addr[i] = tcg_global_mem_new(cpu_env, |
| offsetof(CPUHexagonState, mem_log_stores[i].va), |
| store_addr_names[i]); |
| |
| snprintf(store_width_names[i], NAME_LEN, "store_width_%d", i); |
| hex_store_width[i] = tcg_global_mem_new(cpu_env, |
| offsetof(CPUHexagonState, mem_log_stores[i].width), |
| store_width_names[i]); |
| |
| snprintf(store_val32_names[i], NAME_LEN, "store_val32_%d", i); |
| hex_store_val32[i] = tcg_global_mem_new(cpu_env, |
| offsetof(CPUHexagonState, mem_log_stores[i].data32), |
| store_val32_names[i]); |
| |
| snprintf(store_val64_names[i], NAME_LEN, "store_val64_%d", i); |
| hex_store_val64[i] = tcg_global_mem_new_i64(cpu_env, |
| offsetof(CPUHexagonState, mem_log_stores[i].data64), |
| store_val64_names[i]); |
| } |
| for (int i = 0; i < VSTORES_MAX; i++) { |
| snprintf(vstore_addr_names[i], NAME_LEN, "vstore_addr_%d", i); |
| hex_vstore_addr[i] = tcg_global_mem_new(cpu_env, |
| offsetof(CPUHexagonState, vstore[i].va), |
| vstore_addr_names[i]); |
| |
| snprintf(vstore_size_names[i], NAME_LEN, "vstore_size_%d", i); |
| hex_vstore_size[i] = tcg_global_mem_new(cpu_env, |
| offsetof(CPUHexagonState, vstore[i].size), |
| vstore_size_names[i]); |
| |
| snprintf(vstore_pending_names[i], NAME_LEN, "vstore_pending_%d", i); |
| hex_vstore_pending[i] = tcg_global_mem_new(cpu_env, |
| offsetof(CPUHexagonState, vstore_pending[i]), |
| vstore_pending_names[i]); |
| } |
| } |
