Hexagon (target/hexagon) translation

Read the instruction memory
Create a packet data structure
Generate TCG code for the start of the packet
Invoke the generate function for each instruction
Generate TCG code for the end of the packet

Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Message-Id: <1612763186-18161-30-git-send-email-tsimpson@quicinc.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

target/hexagon/translate.h

+/*
+ *  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/>.
+ */
+
+#ifndef HEXAGON_TRANSLATE_H
+#define HEXAGON_TRANSLATE_H
+
+#include "qemu/bitmap.h"
+#include "cpu.h"
+#include "exec/translator.h"
+#include "tcg/tcg-op.h"
+#include "internal.h"
+
+typedef struct DisasContext {
+    DisasContextBase base;
+    uint32_t mem_idx;
+    uint32_t num_packets;
+    uint32_t num_insns;
+    int reg_log[REG_WRITES_MAX];
+    int reg_log_idx;
+    DECLARE_BITMAP(regs_written, TOTAL_PER_THREAD_REGS);
+    int preg_log[PRED_WRITES_MAX];
+    int preg_log_idx;
+    uint8_t store_width[STORES_MAX];
+    uint8_t s1_store_processed;
+} DisasContext;
+
+static inline void ctx_log_reg_write(DisasContext *ctx, int rnum)
+{
+#if HEX_DEBUG
+    if (test_bit(rnum, ctx->regs_written)) {
+        HEX_DEBUG_LOG("WARNING: Multiple writes to r%d\n", rnum);
+    }
+#endif
+    ctx->reg_log[ctx->reg_log_idx] = rnum;
+    ctx->reg_log_idx++;
+    set_bit(rnum, ctx->regs_written);
+}
+
+static inline void ctx_log_reg_write_pair(DisasContext *ctx, int rnum)
+{
+    ctx_log_reg_write(ctx, rnum);
+    ctx_log_reg_write(ctx, rnum + 1);
+}
+
+static inline void ctx_log_pred_write(DisasContext *ctx, int pnum)
+{
+    ctx->preg_log[ctx->preg_log_idx] = pnum;
+    ctx->preg_log_idx++;
+}
+
+static inline bool is_preloaded(DisasContext *ctx, int num)
+{
+    return test_bit(num, ctx->regs_written);
+}
+
+extern TCGv hex_gpr[TOTAL_PER_THREAD_REGS];
+extern TCGv hex_pred[NUM_PREGS];
+extern TCGv hex_next_PC;
+extern TCGv hex_this_PC;
+extern TCGv hex_slot_cancelled;
+extern TCGv hex_branch_taken;
+extern TCGv hex_new_value[TOTAL_PER_THREAD_REGS];
+extern TCGv hex_reg_written[TOTAL_PER_THREAD_REGS];
+extern TCGv hex_new_pred_value[NUM_PREGS];
+extern TCGv hex_pred_written;
+extern TCGv hex_store_addr[STORES_MAX];
+extern TCGv hex_store_width[STORES_MAX];
+extern TCGv hex_store_val32[STORES_MAX];
+extern TCGv_i64 hex_store_val64[STORES_MAX];
+extern TCGv hex_dczero_addr;
+extern TCGv hex_llsc_addr;
+extern TCGv hex_llsc_val;
+extern TCGv_i64 hex_llsc_val_i64;
+
+void gen_exception(int excp);
+void gen_exception_debug(void);
+
+void process_store(DisasContext *ctx, Packet *pkt, int slot_num);
+#endif