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|
/*
* RISC-V emulation for qemu: Instruction decode helpers
*
* Copyright (c) 2016-2017 Sagar Karandikar, sagark@eecs.berkeley.edu
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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 MASK_OP_MAJOR(op) (op & 0x7F)
enum {
/* rv32i, rv64i, rv32m */
OPC_RISC_LUI = (0x37),
OPC_RISC_AUIPC = (0x17),
OPC_RISC_JAL = (0x6F),
OPC_RISC_JALR = (0x67),
OPC_RISC_BRANCH = (0x63),
OPC_RISC_LOAD = (0x03),
OPC_RISC_STORE = (0x23),
OPC_RISC_ARITH_IMM = (0x13),
OPC_RISC_ARITH = (0x33),
OPC_RISC_FENCE = (0x0F),
OPC_RISC_SYSTEM = (0x73),
/* rv64i, rv64m */
OPC_RISC_ARITH_IMM_W = (0x1B),
OPC_RISC_ARITH_W = (0x3B),
/* rv32a, rv64a */
OPC_RISC_ATOMIC = (0x2F),
/* floating point */
OPC_RISC_FP_LOAD = (0x7),
OPC_RISC_FP_STORE = (0x27),
OPC_RISC_FMADD = (0x43),
OPC_RISC_FMSUB = (0x47),
OPC_RISC_FNMSUB = (0x4B),
OPC_RISC_FNMADD = (0x4F),
OPC_RISC_FP_ARITH = (0x53),
};
#define MASK_OP_ARITH(op) (MASK_OP_MAJOR(op) | (op & ((0x7 << 12) | \
(0x7F << 25))))
enum {
OPC_RISC_ADD = OPC_RISC_ARITH | (0x0 << 12) | (0x00 << 25),
OPC_RISC_SUB = OPC_RISC_ARITH | (0x0 << 12) | (0x20 << 25),
OPC_RISC_SLL = OPC_RISC_ARITH | (0x1 << 12) | (0x00 << 25),
OPC_RISC_SLT = OPC_RISC_ARITH | (0x2 << 12) | (0x00 << 25),
OPC_RISC_SLTU = OPC_RISC_ARITH | (0x3 << 12) | (0x00 << 25),
OPC_RISC_XOR = OPC_RISC_ARITH | (0x4 << 12) | (0x00 << 25),
OPC_RISC_SRL = OPC_RISC_ARITH | (0x5 << 12) | (0x00 << 25),
OPC_RISC_SRA = OPC_RISC_ARITH | (0x5 << 12) | (0x20 << 25),
OPC_RISC_OR = OPC_RISC_ARITH | (0x6 << 12) | (0x00 << 25),
OPC_RISC_AND = OPC_RISC_ARITH | (0x7 << 12) | (0x00 << 25),
/* RV64M */
OPC_RISC_MUL = OPC_RISC_ARITH | (0x0 << 12) | (0x01 << 25),
OPC_RISC_MULH = OPC_RISC_ARITH | (0x1 << 12) | (0x01 << 25),
OPC_RISC_MULHSU = OPC_RISC_ARITH | (0x2 << 12) | (0x01 << 25),
OPC_RISC_MULHU = OPC_RISC_ARITH | (0x3 << 12) | (0x01 << 25),
OPC_RISC_DIV = OPC_RISC_ARITH | (0x4 << 12) | (0x01 << 25),
OPC_RISC_DIVU = OPC_RISC_ARITH | (0x5 << 12) | (0x01 << 25),
OPC_RISC_REM = OPC_RISC_ARITH | (0x6 << 12) | (0x01 << 25),
OPC_RISC_REMU = OPC_RISC_ARITH | (0x7 << 12) | (0x01 << 25),
};
#define MASK_OP_ARITH_IMM(op) (MASK_OP_MAJOR(op) | (op & (0x7 << 12)))
enum {
OPC_RISC_ADDI = OPC_RISC_ARITH_IMM | (0x0 << 12),
OPC_RISC_SLTI = OPC_RISC_ARITH_IMM | (0x2 << 12),
OPC_RISC_SLTIU = OPC_RISC_ARITH_IMM | (0x3 << 12),
OPC_RISC_XORI = OPC_RISC_ARITH_IMM | (0x4 << 12),
OPC_RISC_ORI = OPC_RISC_ARITH_IMM | (0x6 << 12),
OPC_RISC_ANDI = OPC_RISC_ARITH_IMM | (0x7 << 12),
OPC_RISC_SLLI = OPC_RISC_ARITH_IMM | (0x1 << 12), /* additional part of
IMM */
OPC_RISC_SHIFT_RIGHT_I = OPC_RISC_ARITH_IMM | (0x5 << 12) /* SRAI, SRLI */
};
#define MASK_OP_BRANCH(op) (MASK_OP_MAJOR(op) | (op & (0x7 << 12)))
enum {
OPC_RISC_BEQ = OPC_RISC_BRANCH | (0x0 << 12),
OPC_RISC_BNE = OPC_RISC_BRANCH | (0x1 << 12),
OPC_RISC_BLT = OPC_RISC_BRANCH | (0x4 << 12),
OPC_RISC_BGE = OPC_RISC_BRANCH | (0x5 << 12),
OPC_RISC_BLTU = OPC_RISC_BRANCH | (0x6 << 12),
OPC_RISC_BGEU = OPC_RISC_BRANCH | (0x7 << 12)
};
enum {
OPC_RISC_ADDIW = OPC_RISC_ARITH_IMM_W | (0x0 << 12),
OPC_RISC_SLLIW = OPC_RISC_ARITH_IMM_W | (0x1 << 12), /* additional part of
IMM */
OPC_RISC_SHIFT_RIGHT_IW = OPC_RISC_ARITH_IMM_W | (0x5 << 12) /* SRAI, SRLI
*/
};
enum {
OPC_RISC_ADDW = OPC_RISC_ARITH_W | (0x0 << 12) | (0x00 << 25),
OPC_RISC_SUBW = OPC_RISC_ARITH_W | (0x0 << 12) | (0x20 << 25),
OPC_RISC_SLLW = OPC_RISC_ARITH_W | (0x1 << 12) | (0x00 << 25),
OPC_RISC_SRLW = OPC_RISC_ARITH_W | (0x5 << 12) | (0x00 << 25),
OPC_RISC_SRAW = OPC_RISC_ARITH_W | (0x5 << 12) | (0x20 << 25),
/* RV64M */
OPC_RISC_MULW = OPC_RISC_ARITH_W | (0x0 << 12) | (0x01 << 25),
OPC_RISC_DIVW = OPC_RISC_ARITH_W | (0x4 << 12) | (0x01 << 25),
OPC_RISC_DIVUW = OPC_RISC_ARITH_W | (0x5 << 12) | (0x01 << 25),
OPC_RISC_REMW = OPC_RISC_ARITH_W | (0x6 << 12) | (0x01 << 25),
OPC_RISC_REMUW = OPC_RISC_ARITH_W | (0x7 << 12) | (0x01 << 25),
};
#define MASK_OP_LOAD(op) (MASK_OP_MAJOR(op) | (op & (0x7 << 12)))
enum {
OPC_RISC_LB = OPC_RISC_LOAD | (0x0 << 12),
OPC_RISC_LH = OPC_RISC_LOAD | (0x1 << 12),
OPC_RISC_LW = OPC_RISC_LOAD | (0x2 << 12),
OPC_RISC_LD = OPC_RISC_LOAD | (0x3 << 12),
OPC_RISC_LBU = OPC_RISC_LOAD | (0x4 << 12),
OPC_RISC_LHU = OPC_RISC_LOAD | (0x5 << 12),
OPC_RISC_LWU = OPC_RISC_LOAD | (0x6 << 12),
};
#define MASK_OP_STORE(op) (MASK_OP_MAJOR(op) | (op & (0x7 << 12)))
enum {
OPC_RISC_SB = OPC_RISC_STORE | (0x0 << 12),
OPC_RISC_SH = OPC_RISC_STORE | (0x1 << 12),
OPC_RISC_SW = OPC_RISC_STORE | (0x2 << 12),
OPC_RISC_SD = OPC_RISC_STORE | (0x3 << 12),
};
#define MASK_OP_JALR(op) (MASK_OP_MAJOR(op) | (op & (0x7 << 12)))
/* no enum since OPC_RISC_JALR is the actual value */
#define MASK_OP_ATOMIC(op) \
(MASK_OP_MAJOR(op) | (op & ((0x7 << 12) | (0x7F << 25))))
#define MASK_OP_ATOMIC_NO_AQ_RL_SZ(op) \
(MASK_OP_MAJOR(op) | (op & (0x1F << 27)))
enum {
OPC_RISC_LR = OPC_RISC_ATOMIC | (0x02 << 27),
OPC_RISC_SC = OPC_RISC_ATOMIC | (0x03 << 27),
OPC_RISC_AMOSWAP = OPC_RISC_ATOMIC | (0x01 << 27),
OPC_RISC_AMOADD = OPC_RISC_ATOMIC | (0x00 << 27),
OPC_RISC_AMOXOR = OPC_RISC_ATOMIC | (0x04 << 27),
OPC_RISC_AMOAND = OPC_RISC_ATOMIC | (0x0C << 27),
OPC_RISC_AMOOR = OPC_RISC_ATOMIC | (0x08 << 27),
OPC_RISC_AMOMIN = OPC_RISC_ATOMIC | (0x10 << 27),
OPC_RISC_AMOMAX = OPC_RISC_ATOMIC | (0x14 << 27),
OPC_RISC_AMOMINU = OPC_RISC_ATOMIC | (0x18 << 27),
OPC_RISC_AMOMAXU = OPC_RISC_ATOMIC | (0x1C << 27),
};
#define MASK_OP_SYSTEM(op) (MASK_OP_MAJOR(op) | (op & (0x7 << 12)))
enum {
OPC_RISC_ECALL = OPC_RISC_SYSTEM | (0x0 << 12),
OPC_RISC_EBREAK = OPC_RISC_SYSTEM | (0x0 << 12),
OPC_RISC_ERET = OPC_RISC_SYSTEM | (0x0 << 12),
OPC_RISC_MRTS = OPC_RISC_SYSTEM | (0x0 << 12),
OPC_RISC_MRTH = OPC_RISC_SYSTEM | (0x0 << 12),
OPC_RISC_HRTS = OPC_RISC_SYSTEM | (0x0 << 12),
OPC_RISC_WFI = OPC_RISC_SYSTEM | (0x0 << 12),
OPC_RISC_SFENCEVM = OPC_RISC_SYSTEM | (0x0 << 12),
OPC_RISC_CSRRW = OPC_RISC_SYSTEM | (0x1 << 12),
OPC_RISC_CSRRS = OPC_RISC_SYSTEM | (0x2 << 12),
OPC_RISC_CSRRC = OPC_RISC_SYSTEM | (0x3 << 12),
OPC_RISC_CSRRWI = OPC_RISC_SYSTEM | (0x5 << 12),
OPC_RISC_CSRRSI = OPC_RISC_SYSTEM | (0x6 << 12),
OPC_RISC_CSRRCI = OPC_RISC_SYSTEM | (0x7 << 12),
};
#define MASK_OP_FP_LOAD(op) (MASK_OP_MAJOR(op) | (op & (0x7 << 12)))
enum {
OPC_RISC_FLW = OPC_RISC_FP_LOAD | (0x2 << 12),
OPC_RISC_FLD = OPC_RISC_FP_LOAD | (0x3 << 12),
};
#define MASK_OP_FP_STORE(op) (MASK_OP_MAJOR(op) | (op & (0x7 << 12)))
enum {
OPC_RISC_FSW = OPC_RISC_FP_STORE | (0x2 << 12),
OPC_RISC_FSD = OPC_RISC_FP_STORE | (0x3 << 12),
};
#define MASK_OP_FP_FMADD(op) (MASK_OP_MAJOR(op) | (op & (0x3 << 25)))
enum {
OPC_RISC_FMADD_S = OPC_RISC_FMADD | (0x0 << 25),
OPC_RISC_FMADD_D = OPC_RISC_FMADD | (0x1 << 25),
};
#define MASK_OP_FP_FMSUB(op) (MASK_OP_MAJOR(op) | (op & (0x3 << 25)))
enum {
OPC_RISC_FMSUB_S = OPC_RISC_FMSUB | (0x0 << 25),
OPC_RISC_FMSUB_D = OPC_RISC_FMSUB | (0x1 << 25),
};
#define MASK_OP_FP_FNMADD(op) (MASK_OP_MAJOR(op) | (op & (0x3 << 25)))
enum {
OPC_RISC_FNMADD_S = OPC_RISC_FNMADD | (0x0 << 25),
OPC_RISC_FNMADD_D = OPC_RISC_FNMADD | (0x1 << 25),
};
#define MASK_OP_FP_FNMSUB(op) (MASK_OP_MAJOR(op) | (op & (0x3 << 25)))
enum {
OPC_RISC_FNMSUB_S = OPC_RISC_FNMSUB | (0x0 << 25),
OPC_RISC_FNMSUB_D = OPC_RISC_FNMSUB | (0x1 << 25),
};
#define MASK_OP_FP_ARITH(op) (MASK_OP_MAJOR(op) | (op & (0x7F << 25)))
enum {
/* float */
OPC_RISC_FADD_S = OPC_RISC_FP_ARITH | (0x0 << 25),
OPC_RISC_FSUB_S = OPC_RISC_FP_ARITH | (0x4 << 25),
OPC_RISC_FMUL_S = OPC_RISC_FP_ARITH | (0x8 << 25),
OPC_RISC_FDIV_S = OPC_RISC_FP_ARITH | (0xC << 25),
OPC_RISC_FSGNJ_S = OPC_RISC_FP_ARITH | (0x10 << 25),
OPC_RISC_FSGNJN_S = OPC_RISC_FP_ARITH | (0x10 << 25),
OPC_RISC_FSGNJX_S = OPC_RISC_FP_ARITH | (0x10 << 25),
OPC_RISC_FMIN_S = OPC_RISC_FP_ARITH | (0x14 << 25),
OPC_RISC_FMAX_S = OPC_RISC_FP_ARITH | (0x14 << 25),
OPC_RISC_FSQRT_S = OPC_RISC_FP_ARITH | (0x2C << 25),
OPC_RISC_FEQ_S = OPC_RISC_FP_ARITH | (0x50 << 25),
OPC_RISC_FLT_S = OPC_RISC_FP_ARITH | (0x50 << 25),
OPC_RISC_FLE_S = OPC_RISC_FP_ARITH | (0x50 << 25),
OPC_RISC_FCVT_W_S = OPC_RISC_FP_ARITH | (0x60 << 25),
OPC_RISC_FCVT_WU_S = OPC_RISC_FP_ARITH | (0x60 << 25),
OPC_RISC_FCVT_L_S = OPC_RISC_FP_ARITH | (0x60 << 25),
OPC_RISC_FCVT_LU_S = OPC_RISC_FP_ARITH | (0x60 << 25),
OPC_RISC_FCVT_S_W = OPC_RISC_FP_ARITH | (0x68 << 25),
OPC_RISC_FCVT_S_WU = OPC_RISC_FP_ARITH | (0x68 << 25),
OPC_RISC_FCVT_S_L = OPC_RISC_FP_ARITH | (0x68 << 25),
OPC_RISC_FCVT_S_LU = OPC_RISC_FP_ARITH | (0x68 << 25),
OPC_RISC_FMV_X_S = OPC_RISC_FP_ARITH | (0x70 << 25),
OPC_RISC_FCLASS_S = OPC_RISC_FP_ARITH | (0x70 << 25),
OPC_RISC_FMV_S_X = OPC_RISC_FP_ARITH | (0x78 << 25),
/* double */
OPC_RISC_FADD_D = OPC_RISC_FP_ARITH | (0x1 << 25),
OPC_RISC_FSUB_D = OPC_RISC_FP_ARITH | (0x5 << 25),
OPC_RISC_FMUL_D = OPC_RISC_FP_ARITH | (0x9 << 25),
OPC_RISC_FDIV_D = OPC_RISC_FP_ARITH | (0xD << 25),
OPC_RISC_FSGNJ_D = OPC_RISC_FP_ARITH | (0x11 << 25),
OPC_RISC_FSGNJN_D = OPC_RISC_FP_ARITH | (0x11 << 25),
OPC_RISC_FSGNJX_D = OPC_RISC_FP_ARITH | (0x11 << 25),
OPC_RISC_FMIN_D = OPC_RISC_FP_ARITH | (0x15 << 25),
OPC_RISC_FMAX_D = OPC_RISC_FP_ARITH | (0x15 << 25),
OPC_RISC_FCVT_S_D = OPC_RISC_FP_ARITH | (0x20 << 25),
OPC_RISC_FCVT_D_S = OPC_RISC_FP_ARITH | (0x21 << 25),
OPC_RISC_FSQRT_D = OPC_RISC_FP_ARITH | (0x2D << 25),
OPC_RISC_FEQ_D = OPC_RISC_FP_ARITH | (0x51 << 25),
OPC_RISC_FLT_D = OPC_RISC_FP_ARITH | (0x51 << 25),
OPC_RISC_FLE_D = OPC_RISC_FP_ARITH | (0x51 << 25),
OPC_RISC_FCVT_W_D = OPC_RISC_FP_ARITH | (0x61 << 25),
OPC_RISC_FCVT_WU_D = OPC_RISC_FP_ARITH | (0x61 << 25),
OPC_RISC_FCVT_L_D = OPC_RISC_FP_ARITH | (0x61 << 25),
OPC_RISC_FCVT_LU_D = OPC_RISC_FP_ARITH | (0x61 << 25),
OPC_RISC_FCVT_D_W = OPC_RISC_FP_ARITH | (0x69 << 25),
OPC_RISC_FCVT_D_WU = OPC_RISC_FP_ARITH | (0x69 << 25),
OPC_RISC_FCVT_D_L = OPC_RISC_FP_ARITH | (0x69 << 25),
OPC_RISC_FCVT_D_LU = OPC_RISC_FP_ARITH | (0x69 << 25),
OPC_RISC_FMV_X_D = OPC_RISC_FP_ARITH | (0x71 << 25),
OPC_RISC_FCLASS_D = OPC_RISC_FP_ARITH | (0x71 << 25),
OPC_RISC_FMV_D_X = OPC_RISC_FP_ARITH | (0x79 << 25),
};
#define GET_B_IMM(inst) ((extract32(inst, 8, 4) << 1) \
| (extract32(inst, 25, 6) << 5) \
| (extract32(inst, 7, 1) << 11) \
| (sextract64(inst, 31, 1) << 12))
#define GET_STORE_IMM(inst) ((extract32(inst, 7, 5)) \
| (sextract64(inst, 25, 7) << 5))
#define GET_JAL_IMM(inst) ((extract32(inst, 21, 10) << 1) \
| (extract32(inst, 20, 1) << 11) \
| (extract32(inst, 12, 8) << 12) \
| (sextract64(inst, 31, 1) << 20))
#define GET_RM(inst) extract32(inst, 12, 3)
#define GET_RS3(inst) extract32(inst, 27, 5)
#define GET_RS1(inst) extract32(inst, 15, 5)
#define GET_RS2(inst) extract32(inst, 20, 5)
#define GET_RD(inst) extract32(inst, 7, 5)
#define GET_IMM(inst) sextract64(inst, 20, 12)
/* RVC decoding macros */
#define GET_C_IMM(inst) (extract32(inst, 2, 5) \
| (sextract64(inst, 12, 1) << 5))
#define GET_C_ZIMM(inst) (extract32(inst, 2, 5) \
| (extract32(inst, 12, 1) << 5))
#define GET_C_ADDI4SPN_IMM(inst) ((extract32(inst, 6, 1) << 2) \
| (extract32(inst, 5, 1) << 3) \
| (extract32(inst, 11, 2) << 4) \
| (extract32(inst, 7, 4) << 6))
#define GET_C_ADDI16SP_IMM(inst) ((extract32(inst, 6, 1) << 4) \
| (extract32(inst, 2, 1) << 5) \
| (extract32(inst, 5, 1) << 6) \
| (extract32(inst, 3, 2) << 7) \
| (sextract64(inst, 12, 1) << 9))
#define GET_C_LWSP_IMM(inst) ((extract32(inst, 4, 3) << 2) \
| (extract32(inst, 12, 1) << 5) \
| (extract32(inst, 2, 2) << 6))
#define GET_C_LDSP_IMM(inst) ((extract32(inst, 5, 2) << 3) \
| (extract32(inst, 12, 1) << 5) \
| (extract32(inst, 2, 3) << 6))
#define GET_C_SWSP_IMM(inst) ((extract32(inst, 9, 4) << 2) \
| (extract32(inst, 7, 2) << 6))
#define GET_C_SDSP_IMM(inst) ((extract32(inst, 10, 3) << 3) \
| (extract32(inst, 7, 3) << 6))
#define GET_C_LW_IMM(inst) ((extract32(inst, 6, 1) << 2) \
| (extract32(inst, 10, 3) << 3) \
| (extract32(inst, 5, 1) << 6))
#define GET_C_LD_IMM(inst) ((extract32(inst, 10, 3) << 3) \
| (extract32(inst, 5, 2) << 6))
#define GET_C_J_IMM(inst) ((extract32(inst, 3, 3) << 1) \
| (extract32(inst, 11, 1) << 4) \
| (extract32(inst, 2, 1) << 5) \
| (extract32(inst, 7, 1) << 6) \
| (extract32(inst, 6, 1) << 7) \
| (extract32(inst, 9, 2) << 8) \
| (extract32(inst, 8, 1) << 10) \
| (sextract64(inst, 12, 1) << 11))
#define GET_C_B_IMM(inst) ((extract32(inst, 3, 2) << 1) \
| (extract32(inst, 10, 2) << 3) \
| (extract32(inst, 2, 1) << 5) \
| (extract32(inst, 5, 2) << 6) \
| (sextract64(inst, 12, 1) << 8))
#define GET_C_SIMM3(inst) extract32(inst, 10, 3)
#define GET_C_RD(inst) GET_RD(inst)
#define GET_C_RS1(inst) GET_RD(inst)
#define GET_C_RS2(inst) extract32(inst, 2, 5)
#define GET_C_RS1S(inst) (8 + extract32(inst, 7, 3))
#define GET_C_RS2S(inst) (8 + extract32(inst, 2, 3))
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