xref: /openbmc/qemu/target/hexagon/insn.h (revision a67b996e)
1 /*
2  *  Copyright(c) 2019-2021 Qualcomm Innovation Center, Inc. All Rights Reserved.
3  *
4  *  This program is free software; you can redistribute it and/or modify
5  *  it under the terms of the GNU General Public License as published by
6  *  the Free Software Foundation; either version 2 of the License, or
7  *  (at your option) any later version.
8  *
9  *  This program is distributed in the hope that it will be useful,
10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12  *  GNU General Public License for more details.
13  *
14  *  You should have received a copy of the GNU General Public License
15  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
16  */
17 
18 #ifndef HEXAGON_INSN_H
19 #define HEXAGON_INSN_H
20 
21 #include "cpu.h"
22 
23 #define INSTRUCTIONS_MAX 7    /* 2 pairs + loopend */
24 #define REG_OPERANDS_MAX 5
25 #define IMMEDS_MAX 2
26 
27 struct Instruction;
28 struct Packet;
29 struct DisasContext;
30 
31 typedef void (*SemanticInsn)(CPUHexagonState *env,
32                              struct DisasContext *ctx,
33                              struct Instruction *insn,
34                              struct Packet *pkt);
35 
36 struct Instruction {
37     SemanticInsn generate;            /* pointer to genptr routine */
38     uint8_t regno[REG_OPERANDS_MAX];    /* reg operands including predicates */
39     uint16_t opcode;
40 
41     uint32_t iclass:6;
42     uint32_t slot:3;
43     uint32_t which_extended:1;    /* If has an extender, which immediate */
44     uint32_t new_value_producer_slot:4;
45 
46     bool part1;              /*
47                               * cmp-jumps are split into two insns.
48                               * set for the compare and clear for the jump
49                               */
50     bool extension_valid;   /* Has a constant extender attached */
51     bool is_endloop;   /* This is an end of loop */
52     int32_t immed[IMMEDS_MAX];    /* immediate field */
53 };
54 
55 typedef struct Instruction Insn;
56 
57 struct Packet {
58     uint16_t num_insns;
59     uint16_t encod_pkt_size_in_bytes;
60 
61     /* Pre-decodes about COF */
62     bool pkt_has_cof;          /* Has any change-of-flow */
63     bool pkt_has_endloop;
64 
65     bool pkt_has_dczeroa;
66 
67     bool pkt_has_store_s0;
68     bool pkt_has_store_s1;
69 
70     Insn insn[INSTRUCTIONS_MAX];
71 };
72 
73 typedef struct Packet Packet;
74 
75 #endif
76