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150 lines
5.3 KiB
C
150 lines
5.3 KiB
C
/* RISC-V ISA encoding.
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Copyright (C) 2011-2014 Free Software Foundation, Inc.
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Contributed by Andrew Waterman (waterman@cs.berkeley.edu) at UC Berkeley.
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Based on MIPS target for GNU compiler.
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This file is part of GDB, GAS, and the GNU binutils.
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GDB, GAS, and the GNU binutils are free software; you can redistribute
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them and/or modify them under the terms of the GNU General Public
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License as published by the Free Software Foundation; either version
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1, or (at your option) any later version.
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GDB, GAS, and the GNU binutils are distributed in the hope that they
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will be useful, but WITHOUT ANY WARRANTY; without even the implied
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warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this file; see the file COPYING. If not, write to the Free
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Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
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#ifndef _RISCV_H_
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#define _RISCV_H_
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#define RV_X(x, s, n) (((x) >> (s)) & ((1<<(n))-1))
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#define RV_IMM_SIGN(x) (-(((x) >> 31) & 1))
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#define EXTRACT_ITYPE_IMM(x) \
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(RV_X(x, 20, 12) | (RV_IMM_SIGN(x) << 12))
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#define EXTRACT_STYPE_IMM(x) \
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(RV_X(x, 7, 5) | (RV_X(x, 25, 7) << 5) | (RV_IMM_SIGN(x) << 12))
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#define EXTRACT_SBTYPE_IMM(x) \
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((RV_X(x, 8, 4) << 1) | (RV_X(x, 25, 6) << 5) | (RV_X(x, 7, 1) << 11) | (RV_IMM_SIGN(x) << 12))
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#define EXTRACT_UTYPE_IMM(x) \
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((RV_X(x, 12, 20) << 20) | (RV_IMM_SIGN(x) << 32))
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#define EXTRACT_UJTYPE_IMM(x) \
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((RV_X(x, 21, 10) << 1) | (RV_X(x, 20, 1) << 11) | (RV_X(x, 12, 8) << 12) | (RV_IMM_SIGN(x) << 20))
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#define ENCODE_ITYPE_IMM(x) \
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(RV_X(x, 0, 12) << 20)
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#define ENCODE_STYPE_IMM(x) \
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((RV_X(x, 0, 5) << 7) | (RV_X(x, 5, 7) << 25))
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#define ENCODE_SBTYPE_IMM(x) \
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((RV_X(x, 1, 4) << 8) | (RV_X(x, 5, 6) << 25) | (RV_X(x, 11, 1) << 7) | (RV_X(x, 12, 1) << 31))
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#define ENCODE_UTYPE_IMM(x) \
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(RV_X(x, 12, 20) << 12)
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#define ENCODE_UJTYPE_IMM(x) \
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((RV_X(x, 1, 10) << 21) | (RV_X(x, 11, 1) << 20) | (RV_X(x, 12, 8) << 12) | (RV_X(x, 20, 1) << 31))
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#define VALID_ITYPE_IMM(x) (EXTRACT_ITYPE_IMM(ENCODE_ITYPE_IMM(x)) == (x))
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#define VALID_STYPE_IMM(x) (EXTRACT_STYPE_IMM(ENCODE_STYPE_IMM(x)) == (x))
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#define VALID_SBTYPE_IMM(x) (EXTRACT_SBTYPE_IMM(ENCODE_SBTYPE_IMM(x)) == (x))
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#define VALID_UTYPE_IMM(x) (EXTRACT_UTYPE_IMM(ENCODE_UTYPE_IMM(x)) == (x))
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#define VALID_UJTYPE_IMM(x) (EXTRACT_UJTYPE_IMM(ENCODE_UJTYPE_IMM(x)) == (x))
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#define RISCV_RTYPE(insn, rd, rs1, rs2) \
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((MATCH_ ## insn) | ((rd) << OP_SH_RD) | ((rs1) << OP_SH_RS1) | ((rs2) << OP_SH_RS2))
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#define RISCV_ITYPE(insn, rd, rs1, imm) \
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((MATCH_ ## insn) | ((rd) << OP_SH_RD) | ((rs1) << OP_SH_RS1) | ENCODE_ITYPE_IMM(imm))
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#define RISCV_STYPE(insn, rs1, rs2, imm) \
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((MATCH_ ## insn) | ((rs1) << OP_SH_RS1) | ((rs2) << OP_SH_RS2) | ENCODE_STYPE_IMM(imm))
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#define RISCV_SBTYPE(insn, rs1, rs2, target) \
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((MATCH_ ## insn) | ((rs1) << OP_SH_RS1) | ((rs2) << OP_SH_RS2) | ENCODE_SBTYPE_IMM(target))
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#define RISCV_UTYPE(insn, rd, bigimm) \
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((MATCH_ ## insn) | ((rd) << OP_SH_RD) | ENCODE_UTYPE_IMM(bigimm))
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#define RISCV_UJTYPE(insn, rd, target) \
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((MATCH_ ## insn) | ((rd) << OP_SH_RD) | ENCODE_UJTYPE_IMM(target))
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#define RISCV_NOP RISCV_ITYPE(ADDI, 0, 0, 0)
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#define RISCV_CONST_HIGH_PART(VALUE) \
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(((VALUE) + (RISCV_IMM_REACH/2)) & ~(RISCV_IMM_REACH-1))
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#define RISCV_CONST_LOW_PART(VALUE) ((VALUE) - RISCV_CONST_HIGH_PART (VALUE))
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/* RV fields */
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#define OP_MASK_OP 0x7f
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#define OP_SH_OP 0
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#define OP_MASK_RS2 0x1f
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#define OP_SH_RS2 20
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#define OP_MASK_RS1 0x1f
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#define OP_SH_RS1 15
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#define OP_MASK_RS3 0x1f
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#define OP_SH_RS3 27
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#define OP_MASK_RD 0x1f
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#define OP_SH_RD 7
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#define OP_MASK_SHAMT 0x3f
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#define OP_SH_SHAMT 20
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#define OP_MASK_SHAMTW 0x1f
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#define OP_SH_SHAMTW 20
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#define OP_MASK_RM 0x7
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#define OP_SH_RM 12
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#define OP_MASK_PRED 0xf
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#define OP_SH_PRED 24
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#define OP_MASK_SUCC 0xf
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#define OP_SH_SUCC 20
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#define OP_MASK_AQ 0x1
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#define OP_SH_AQ 26
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#define OP_MASK_RL 0x1
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#define OP_SH_RL 25
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#define OP_MASK_VRD 0x1f
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#define OP_SH_VRD 7
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#define OP_MASK_VRS 0x1f
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#define OP_SH_VRS 15
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#define OP_MASK_VRT 0x1f
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#define OP_SH_VRT 20
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#define OP_MASK_VRR 0x1f
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#define OP_SH_VRR 25
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#define OP_MASK_VFD 0x1f
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#define OP_SH_VFD 7
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#define OP_MASK_VFS 0x1f
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#define OP_SH_VFS 15
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#define OP_MASK_VFT 0x1f
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#define OP_SH_VFT 20
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#define OP_MASK_VFR 0x1f
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#define OP_SH_VFR 25
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#define OP_MASK_IMMNGPR 0x3f
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#define OP_SH_IMMNGPR 20
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#define OP_MASK_IMMNFPR 0x3f
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#define OP_SH_IMMNFPR 26
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#define OP_MASK_IMMSEGNELM 0x1f
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#define OP_SH_IMMSEGNELM 17
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#define OP_MASK_IMMSEGSTNELM 0x1f
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#define OP_SH_IMMSEGSTNELM 12
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#define OP_MASK_CUSTOM_IMM 0x7f
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#define OP_SH_CUSTOM_IMM 25
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#define LINK_REG 1
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#define RISCV_JUMP_BITS RISCV_BIGIMM_BITS
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#define RISCV_JUMP_ALIGN_BITS 1
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#define RISCV_JUMP_ALIGN (1 << RISCV_JUMP_ALIGN_BITS)
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#define RISCV_JUMP_REACH ((1ULL<<RISCV_JUMP_BITS)*RISCV_JUMP_ALIGN)
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#define RISCV_IMM_BITS 12
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#define RISCV_BIGIMM_BITS (32-RISCV_IMM_BITS)
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#define RISCV_IMM_REACH (1LL<<RISCV_IMM_BITS)
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#define RISCV_BIGIMM_REACH (1LL<<RISCV_BIGIMM_BITS)
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#define RISCV_BRANCH_BITS RISCV_IMM_BITS
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#define RISCV_BRANCH_ALIGN_BITS RISCV_JUMP_ALIGN_BITS
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#define RISCV_BRANCH_ALIGN (1 << RISCV_BRANCH_ALIGN_BITS)
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#define RISCV_BRANCH_REACH (RISCV_IMM_REACH*RISCV_BRANCH_ALIGN)
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#include "riscv-opc.h"
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#endif /* _RISCV_H_ */
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