Hexagon (target/hexagon) instruction and packet types

The insn_t and packet_t are the interface between instruction decoding and
TCG code generation

Signed-off-by: Taylor Simpson <tsimpson@quicinc.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <1612763186-18161-11-git-send-email-tsimpson@quicinc.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

target/hexagon/insn.h

@@ -0,0 +1,74 @@
+/*
+ *  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_INSN_H
+#define HEXAGON_INSN_H
+
+#include "cpu.h"
+
+#define INSTRUCTIONS_MAX 7    /* 2 pairs + loopend */
+#define REG_OPERANDS_MAX 5
+#define IMMEDS_MAX 2
+
+struct Instruction;
+struct Packet;
+struct DisasContext;
+
+typedef void (*SemanticInsn)(CPUHexagonState *env,
+                             struct DisasContext *ctx,
+                             struct Instruction *insn,
+                             struct Packet *pkt);
+
+struct Instruction {
+    SemanticInsn generate;            /* pointer to genptr routine */
+    uint8_t regno[REG_OPERANDS_MAX];    /* reg operands including predicates */
+    uint16_t opcode;
+
+    uint32_t iclass:6;
+    uint32_t slot:3;
+    uint32_t part1:1;        /*
+                              * cmp-jumps are split into two insns.
+                              * set for the compare and clear for the jump
+                              */
+    uint32_t extension_valid:1;   /* Has a constant extender attached */
+    uint32_t which_extended:1;    /* If has an extender, which immediate */
+    uint32_t is_endloop:1;   /* This is an end of loop */
+    uint32_t new_value_producer_slot:4;
+    int32_t immed[IMMEDS_MAX];    /* immediate field */
+};
+
+typedef struct Instruction Insn;
+
+struct Packet {
+    uint16_t num_insns;
+    uint16_t encod_pkt_size_in_bytes;
+
+    /* Pre-decodes about COF */
+    uint32_t pkt_has_cof:1;          /* Has any change-of-flow */
+    uint32_t pkt_has_endloop:1;
+
+    uint32_t pkt_has_dczeroa:1;
+
+    uint32_t pkt_has_store_s0:1;
+    uint32_t pkt_has_store_s1:1;
+
+    Insn insn[INSTRUCTIONS_MAX];
+};
+
+typedef struct Packet Packet;
+
+#endif