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/* SPDX-License-Identifier: GPL-2.0 */
/*
* BPF JIT compiler for SW64
*
* Copyright (C) Mao Minkai
* Author: Mao Minkai
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* 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 _SW64_BPF_JIT_H
#define _SW64_BPF_JIT_H
#define SW64_BPF_OPCODE_OFFSET 26
#define SW64_BPF_RA_OFFSET 21
#define SW64_BPF_RB_OFFSET 16
#define SW64_BPF_SIMPLE_ALU_IMM_OFFSET 13
#define SW64_BPF_SIMPLE_ALU_FUNC_OFFSET 5
#define SW64_BPF_SIMPLE_ALU_RC_OFFSET 0
#define SW64_BPF_OPCODE_BR_CALL 0x01
#define SW64_BPF_OPCODE_BR_RET 0x02
#define SW64_BPF_OPCODE_BR_JMP 0x03
#define SW64_BPF_OPCODE_BR_BR 0x04
#define SW64_BPF_OPCODE_BR_BSR 0x05
#define SW64_BPF_OPCODE_BR_BEQ 0x30
#define SW64_BPF_OPCODE_BR_BNE 0x31
#define SW64_BPF_OPCODE_BR_BLT 0x32
#define SW64_BPF_OPCODE_BR_BLE 0x33
#define SW64_BPF_OPCODE_BR_BGT 0x34
#define SW64_BPF_OPCODE_BR_BGE 0x35
#define SW64_BPF_OPCODE_BR_BLBC 0x36
#define SW64_BPF_OPCODE_BR_BLBS 0x37
#define SW64_BPF_OPCODE_LS_LDBU 0x20
#define SW64_BPF_OPCODE_LS_LDHU 0x21
#define SW64_BPF_OPCODE_LS_LDW 0x22
#define SW64_BPF_OPCODE_LS_LDL 0x23
#define SW64_BPF_OPCODE_LS_STB 0x28
#define SW64_BPF_OPCODE_LS_STH 0x29
#define SW64_BPF_OPCODE_LS_STW 0x2A
#define SW64_BPF_OPCODE_LS_STL 0x2B
#define SW64_BPF_OPCODE_LS_LDI 0x3E
#define SW64_BPF_OPCODE_LS_LDIH 0x3F
#define SW64_BPF_OPCODE_ALU_REG 0x10
#define SW64_BPF_OPCODE_ALU_IMM 0x12
#define SW64_BPF_FUNC_ALU_ADDW 0x00
#define SW64_BPF_FUNC_ALU_SUBW 0x01
#define SW64_BPF_FUNC_ALU_ADDL 0x08
#define SW64_BPF_FUNC_ALU_SUBL 0x09
#define SW64_BPF_FUNC_ALU_MULW 0x10
#define SW64_BPF_FUNC_ALU_MULL 0x18
#define SW64_BPF_FUNC_ALU_ZAP 0x68
#define SW64_BPF_FUNC_ALU_ZAPNOT 0x69
#define SW64_BPF_FUNC_ALU_SEXTB 0x6A
#define SW64_BPF_FUNC_ALU_SEXTH 0x6B
#define SW64_BPF_OPCODE_BS_REG 0x10
#define SW64_BPF_OPCODE_BS_IMM 0x12
#define SW64_BPF_FUNC_BS_SLL 0x48
#define SW64_BPF_FUNC_BS_SRL 0x49
#define SW64_BPF_FUNC_BS_SRA 0x4A
#define SW64_BPF_OPCODE_LOGIC_REG 0x10
#define SW64_BPF_OPCODE_LOGIC_IMM 0x12
#define SW64_BPF_FUNC_LOGIC_AND 0x38
#define SW64_BPF_FUNC_LOGIC_BIC 0x39
#define SW64_BPF_FUNC_LOGIC_BIS 0x3A
#define SW64_BPF_FUNC_LOGIC_ORNOT 0x3B
#define SW64_BPF_FUNC_LOGIC_XOR 0x3C
#define SW64_BPF_FUNC_LOGIC_EQV 0x3D
#define SW64_BPF_OPCODE_CMP_REG 0x10
#define SW64_BPF_OPCODE_CMP_IMM 0x12
#define SW64_BPF_FUNC_CMP_EQ 0x28
#define SW64_BPF_FUNC_CMP_LT 0x29
#define SW64_BPF_FUNC_CMP_LE 0x2A
#define SW64_BPF_FUNC_CMP_ULT 0x2B
#define SW64_BPF_FUNC_CMP_ULE 0x2C
/* special instuction used in jit_fill_hole() */
#define SW64_BPF_ILLEGAL_INSN ((1 << 25) | 0x80)
enum sw64_bpf_registers {
SW64_BPF_REG_V0 = 0, /* keep return value */
SW64_BPF_REG_T0 = 1,
SW64_BPF_REG_T1 = 2,
SW64_BPF_REG_T2 = 3,
SW64_BPF_REG_T3 = 4,
SW64_BPF_REG_T4 = 5,
SW64_BPF_REG_T5 = 6,
SW64_BPF_REG_T6 = 7,
SW64_BPF_REG_T7 = 8,
SW64_BPF_REG_S0 = 9, /* callee saved */
SW64_BPF_REG_S1 = 10, /* callee saved */
SW64_BPF_REG_S2 = 11, /* callee saved */
SW64_BPF_REG_S3 = 12, /* callee saved */
SW64_BPF_REG_S4 = 13, /* callee saved */
SW64_BPF_REG_S5 = 14, /* callee saved */
SW64_BPF_REG_S6 = 15, /* callee saved */
SW64_BPF_REG_FP = 15, /* frame pointer if necessary */
SW64_BPF_REG_A0 = 16, /* argument 0 */
SW64_BPF_REG_A1 = 17, /* argument 1 */
SW64_BPF_REG_A2 = 18, /* argument 2 */
SW64_BPF_REG_A3 = 19, /* argument 3 */
SW64_BPF_REG_A4 = 20, /* argument 4 */
SW64_BPF_REG_A5 = 21, /* argument 5 */
SW64_BPF_REG_T8 = 22,
SW64_BPF_REG_T9 = 23,
SW64_BPF_REG_T10 = 24,
SW64_BPF_REG_T11 = 25,
SW64_BPF_REG_RA = 26, /* callee saved, keep retuen address */
SW64_BPF_REG_T12 = 27,
SW64_BPF_REG_PV = 27,
SW64_BPF_REG_AT = 28, /* reserved by assembler */
SW64_BPF_REG_GP = 29, /* global pointer */
SW64_BPF_REG_SP = 30, /* callee saved, stack pointer */
SW64_BPF_REG_ZR = 31 /* read 0 */
};
/* SW64 load and store instructions */
#define SW64_BPF_LDBU(dst, rb, offset16) \
sw64_bpf_gen_format_ls(SW64_BPF_OPCODE_LS_LDBU, dst, rb, offset16)
#define SW64_BPF_LDHU(dst, rb, offset16) \
sw64_bpf_gen_format_ls(SW64_BPF_OPCODE_LS_LDHU, dst, rb, offset16)
#define SW64_BPF_LDW(dst, rb, offset16) \
sw64_bpf_gen_format_ls(SW64_BPF_OPCODE_LS_LDW, dst, rb, offset16)
#define SW64_BPF_LDL(dst, rb, offset16) \
sw64_bpf_gen_format_ls(SW64_BPF_OPCODE_LS_LDL, dst, rb, offset16)
#define SW64_BPF_STB(src, rb, offset16) \
sw64_bpf_gen_format_ls(SW64_BPF_OPCODE_LS_STB, src, rb, offset16)
#define SW64_BPF_STH(src, rb, offset16) \
sw64_bpf_gen_format_ls(SW64_BPF_OPCODE_LS_STH, src, rb, offset16)
#define SW64_BPF_STW(src, rb, offset16) \
sw64_bpf_gen_format_ls(SW64_BPF_OPCODE_LS_STW, src, rb, offset16)
#define SW64_BPF_STL(src, rb, offset16) \
sw64_bpf_gen_format_ls(SW64_BPF_OPCODE_LS_STL, src, rb, offset16)
#define SW64_BPF_LDI(dst, rb, imm16) \
sw64_bpf_gen_format_ls(SW64_BPF_OPCODE_LS_LDI, dst, rb, imm16)
#define SW64_BPF_LDIH(dst, rb, imm16) \
sw64_bpf_gen_format_ls(SW64_BPF_OPCODE_LS_LDIH, dst, rb, imm16)
/* SW64 ALU instructions REG format */
#define SW64_BPF_ADDW_REG(ra, rb, dst) \
sw64_bpf_gen_format_simple_alu_reg(SW64_BPF_OPCODE_ALU_REG, \
ra, rb, dst, SW64_BPF_FUNC_ALU_ADDW)
#define SW64_BPF_ADDL_REG(ra, rb, dst) \
sw64_bpf_gen_format_simple_alu_reg(SW64_BPF_OPCODE_ALU_REG, \
ra, rb, dst, SW64_BPF_FUNC_ALU_ADDL)
#define SW64_BPF_SUBW_REG(ra, rb, dst) \
sw64_bpf_gen_format_simple_alu_reg(SW64_BPF_OPCODE_ALU_REG, \
ra, rb, dst, SW64_BPF_FUNC_ALU_SUBW)
#define SW64_BPF_SUBL_REG(ra, rb, dst) \
sw64_bpf_gen_format_simple_alu_reg(SW64_BPF_OPCODE_ALU_REG, \
ra, rb, dst, SW64_BPF_FUNC_ALU_SUBL)
#define SW64_BPF_MULW_REG(ra, rb, dst) \
sw64_bpf_gen_format_simple_alu_reg(SW64_BPF_OPCODE_ALU_REG, \
ra, rb, dst, SW64_BPF_FUNC_ALU_MULW)
#define SW64_BPF_MULL_REG(ra, rb, dst) \
sw64_bpf_gen_format_simple_alu_reg(SW64_BPF_OPCODE_ALU_REG, \
ra, rb, dst, SW64_BPF_FUNC_ALU_MULL)
#define SW64_BPF_ZAP_REG(ra, rb, dst) \
sw64_bpf_gen_format_simple_alu_reg(SW64_BPF_OPCODE_ALU_REG, \
ra, rb, dst, SW64_BPF_FUNC_ALU_ZAP)
#define SW64_BPF_ZAPNOT_REG(ra, rb, dst) \
sw64_bpf_gen_format_simple_alu_reg(SW64_BPF_OPCODE_ALU_REG, \
ra, rb, dst, SW64_BPF_FUNC_ALU_ZAPNOT)
#define SW64_BPF_SEXTB_REG(rb, dst) \
sw64_bpf_gen_format_simple_alu_reg(SW64_BPF_OPCODE_ALU_REG, \
0, rb, dst, SW64_BPF_FUNC_ALU_SEXTB)
#define SW64_BPF_SEXTH_REG(rb, dst) \
sw64_bpf_gen_format_simple_alu_reg(SW64_BPF_OPCODE_ALU_REG, \
0, rb, dst, SW64_BPF_FUNC_ALU_SEXTH)
/* SW64 ALU instructions IMM format */
#define SW64_BPF_ADDW_IMM(ra, imm8, dst) \
sw64_bpf_gen_format_simple_alu_imm(SW64_BPF_OPCODE_ALU_IMM, \
ra, imm8, dst, SW64_BPF_FUNC_ALU_ADDW)
#define SW64_BPF_ADDL_IMM(ra, imm8, dst) \
sw64_bpf_gen_format_simple_alu_imm(SW64_BPF_OPCODE_ALU_IMM, \
ra, imm8, dst, SW64_BPF_FUNC_ALU_ADDL)
#define SW64_BPF_SUBW_IMM(ra, imm8, dst) \
sw64_bpf_gen_format_simple_alu_imm(SW64_BPF_OPCODE_ALU_IMM, \
ra, imm8, dst, SW64_BPF_FUNC_ALU_SUBW)
#define SW64_BPF_SUBL_IMM(ra, imm8, dst) \
sw64_bpf_gen_format_simple_alu_imm(SW64_BPF_OPCODE_ALU_IMM, \
ra, imm8, dst, SW64_BPF_FUNC_ALU_SUBL)
#define SW64_BPF_MULW_IMM(ra, imm8, dst) \
sw64_bpf_gen_format_simple_alu_imm(SW64_BPF_OPCODE_ALU_IMM, \
ra, imm8, dst, SW64_BPF_FUNC_ALU_MULW)
#define SW64_BPF_MULL_IMM(ra, imm8, dst) \
sw64_bpf_gen_format_simple_alu_imm(SW64_BPF_OPCODE_ALU_IMM, \
ra, imm8, dst, SW64_BPF_FUNC_ALU_MULL)
#define SW64_BPF_ZAP_IMM(ra, imm8, dst) \
sw64_bpf_gen_format_simple_alu_imm(SW64_BPF_OPCODE_ALU_IMM, \
ra, imm8, dst, SW64_BPF_FUNC_ALU_ZAP)
#define SW64_BPF_ZAPNOT_IMM(ra, imm8, dst) \
sw64_bpf_gen_format_simple_alu_imm(SW64_BPF_OPCODE_ALU_IMM, \
ra, imm8, dst, SW64_BPF_FUNC_ALU_ZAPNOT)
#define SW64_BPF_SEXTB_IMM(imm8, dst) \
sw64_bpf_gen_format_simple_alu_imm(SW64_BPF_OPCODE_ALU_IMM, \
0, imm8, dst, SW64_BPF_FUNC_ALU_SEXTB)
/* SW64 bit shift instructions REG format */
#define SW64_BPF_SLL_REG(src, rb, dst) \
sw64_bpf_gen_format_simple_alu_reg(SW64_BPF_OPCODE_BS_REG, \
src, rb, dst, SW64_BPF_FUNC_BS_SLL)
#define SW64_BPF_SRL_REG(src, rb, dst) \
sw64_bpf_gen_format_simple_alu_reg(SW64_BPF_OPCODE_BS_REG, \
src, rb, dst, SW64_BPF_FUNC_BS_SRL)
#define SW64_BPF_SRA_REG(src, rb, dst) \
sw64_bpf_gen_format_simple_alu_reg(SW64_BPF_OPCODE_BS_REG, \
src, rb, dst, SW64_BPF_FUNC_BS_SRA)
/* SW64 bit shift instructions IMM format */
#define SW64_BPF_SLL_IMM(src, imm8, dst) \
sw64_bpf_gen_format_simple_alu_imm(SW64_BPF_OPCODE_BS_IMM, \
src, imm8, dst, SW64_BPF_FUNC_BS_SLL)
#define SW64_BPF_SRL_IMM(src, imm8, dst) \
sw64_bpf_gen_format_simple_alu_imm(SW64_BPF_OPCODE_BS_IMM, \
src, imm8, dst, SW64_BPF_FUNC_BS_SRL)
#define SW64_BPF_SRA_IMM(src, imm8, dst) \
sw64_bpf_gen_format_simple_alu_imm(SW64_BPF_OPCODE_BS_IMM, \
src, imm8, dst, SW64_BPF_FUNC_BS_SRA)
/* SW64 control instructions */
#define SW64_BPF_CALL(ra, rb) \
sw64_bpf_gen_format_ls(SW64_BPF_OPCODE_BR_CALL, ra, rb, 0)
#define SW64_BPF_RET(rb) \
sw64_bpf_gen_format_ls(SW64_BPF_OPCODE_BR_RET, SW64_BPF_REG_ZR, rb, 0)
#define SW64_BPF_JMP(ra, rb) \
sw64_bpf_gen_format_ls(SW64_BPF_OPCODE_BR_JMP, ra, rb, 0)
#define SW64_BPF_BR(ra, offset) \
sw64_bpf_gen_format_br(SW64_BPF_OPCODE_BR_BR, ra, offset)
#define SW64_BPF_BSR(ra, offset) \
sw64_bpf_gen_format_br(SW64_BPF_OPCODE_BR_BSR, ra, offset)
#define SW64_BPF_BEQ(ra, offset) \
sw64_bpf_gen_format_br(SW64_BPF_OPCODE_BR_BEQ, ra, offset)
#define SW64_BPF_BNE(ra, offset) \
sw64_bpf_gen_format_br(SW64_BPF_OPCODE_BR_BNE, ra, offset)
#define SW64_BPF_BLT(ra, offset) \
sw64_bpf_gen_format_br(SW64_BPF_OPCODE_BR_BLT, ra, offset)
#define SW64_BPF_BLE(ra, offset) \
sw64_bpf_gen_format_br(SW64_BPF_OPCODE_BR_BLE, ra, offset)
#define SW64_BPF_BGT(ra, offset) \
sw64_bpf_gen_format_br(SW64_BPF_OPCODE_BR_BGT, ra, offset)
#define SW64_BPF_BGE(ra, offset) \
sw64_bpf_gen_format_br(SW64_BPF_OPCODE_BR_BGE, ra, offset)
#define SW64_BPF_BLBC(ra, offset) \
sw64_bpf_gen_format_br(SW64_BPF_OPCODE_BR_BLBC, ra, offset)
#define SW64_BPF_BLBS(ra, offset) \
sw64_bpf_gen_format_br(SW64_BPF_OPCODE_BR_BLBS, ra, offset)
/* SW64 bit logic instructions REG format */
#define SW64_BPF_AND_REG(ra, rb, dst) \
sw64_bpf_gen_format_simple_alu_reg(SW64_BPF_OPCODE_LOGIC_REG, \
ra, rb, dst, SW64_BPF_FUNC_LOGIC_AND)
#define SW64_BPF_ANDNOT_REG(ra, rb, dst) \
sw64_bpf_gen_format_simple_alu_reg(SW64_BPF_OPCODE_LOGIC_REG, \
ra, rb, dst, SW64_BPF_FUNC_LOGIC_BIC)
#define SW64_BPF_OR_REG(ra, rb, dst) \
sw64_bpf_gen_format_simple_alu_reg(SW64_BPF_OPCODE_LOGIC_REG, \
ra, rb, dst, SW64_BPF_FUNC_LOGIC_BIS)
#define SW64_BPF_ORNOT_REG(ra, rb, dst) \
sw64_bpf_gen_format_simple_alu_reg(SW64_BPF_OPCODE_LOGIC_REG, \
ra, rb, dst, SW64_BPF_FUNC_LOGIC_ORNOT)
#define SW64_BPF_XOR_REG(ra, rb, dst) \
sw64_bpf_gen_format_simple_alu_reg(SW64_BPF_OPCODE_LOGIC_REG, \
ra, rb, dst, SW64_BPF_FUNC_LOGIC_XOR)
#define SW64_BPF_EQV_REG(ra, rb, dst) \
sw64_bpf_gen_format_simple_alu_reg(SW64_BPF_OPCODE_LOGIC_REG, \
ra, rb, dst, SW64_BPF_FUNC_LOGIC_EQV)
/* SW64 bit logic instructions IMM format */
#define SW64_BPF_AND_IMM(ra, imm8, dst) \
sw64_bpf_gen_format_simple_alu_imm(SW64_BPF_OPCODE_LOGIC_IMM, \
ra, imm8, dst, SW64_BPF_FUNC_LOGIC_AND)
#define SW64_BPF_ANDNOT_IMM(ra, imm8, dst) \
sw64_bpf_gen_format_simple_alu_imm(SW64_BPF_OPCODE_LOGIC_IMM, \
ra, imm8, dst, SW64_BPF_FUNC_LOGIC_BIC)
#define SW64_BPF_OR_IMM(ra, imm8, dst) \
sw64_bpf_gen_format_simple_alu_imm(SW64_BPF_OPCODE_LOGIC_IMM, \
ra, imm8, dst, SW64_BPF_FUNC_LOGIC_BIS)
#define SW64_BPF_ORNOT_IMM(ra, imm8, dst) \
sw64_bpf_gen_format_simple_alu_imm(SW64_BPF_OPCODE_LOGIC_IMM, \
ra, imm8, dst, SW64_BPF_FUNC_LOGIC_ORNOT)
#define SW64_BPF_XOR_IMM(ra, imm8, dst) \
sw64_bpf_gen_format_simple_alu_imm(SW64_BPF_OPCODE_LOGIC_IMM, \
ra, imm8, dst, SW64_BPF_FUNC_LOGIC_XOR)
#define SW64_BPF_EQV_IMM(ra, imm8, dst) \
sw64_bpf_gen_format_simple_alu_imm(SW64_BPF_OPCODE_LOGIC_IMM, \
ra, imm8, dst, SW64_BPF_FUNC_LOGIC_EQV)
/* SW64 compare instructions REG format */
#define SW64_BPF_CMPEQ_REG(ra, rb, dst) \
sw64_bpf_gen_format_simple_alu_reg(SW64_BPF_OPCODE_CMP_REG, \
ra, rb, dst, SW64_BPF_FUNC_CMP_EQ)
#define SW64_BPF_CMPLT_REG(ra, rb, dst) \
sw64_bpf_gen_format_simple_alu_reg(SW64_BPF_OPCODE_CMP_REG, \
ra, rb, dst, SW64_BPF_FUNC_CMP_LT)
#define SW64_BPF_CMPLE_REG(ra, rb, dst) \
sw64_bpf_gen_format_simple_alu_reg(SW64_BPF_OPCODE_CMP_REG, \
ra, rb, dst, SW64_BPF_FUNC_CMP_LE)
#define SW64_BPF_CMPULT_REG(ra, rb, dst) \
sw64_bpf_gen_format_simple_alu_reg(SW64_BPF_OPCODE_CMP_REG, \
ra, rb, dst, SW64_BPF_FUNC_CMP_ULT)
#define SW64_BPF_CMPULE_REG(ra, rb, dst) \
sw64_bpf_gen_format_simple_alu_reg(SW64_BPF_OPCODE_CMP_REG, \
ra, rb, dst, SW64_BPF_FUNC_CMP_ULE)
/* SW64 compare instructions imm format */
#define SW64_BPF_CMPEQ_IMM(ra, imm8, dst) \
sw64_bpf_gen_format_simple_alu_imm(SW64_BPF_OPCODE_CMP_IMM, \
ra, imm8, dst, SW64_BPF_FUNC_CMP_EQ)
#define SW64_BPF_CMPLT_IMM(ra, imm8, dst) \
sw64_bpf_gen_format_simple_alu_imm(SW64_BPF_OPCODE_CMP_IMM, \
ra, imm8, dst, SW64_BPF_FUNC_CMP_LT)
#define SW64_BPF_CMPLE_IMM(ra, imm8, dst) \
sw64_bpf_gen_format_simple_alu_imm(SW64_BPF_OPCODE_CMP_IMM, \
ra, imm8, dst, SW64_BPF_FUNC_CMP_LE)
#define SW64_BPF_CMPULT_IMM(ra, imm8, dst) \
sw64_bpf_gen_format_simple_alu_imm(SW64_BPF_OPCODE_CMP_IMM, \
ra, imm8, dst, SW64_BPF_FUNC_CMP_ULT)
#define SW64_BPF_CMPULE_IMM(ra, imm8, dst) \
sw64_bpf_gen_format_simple_alu_imm(SW64_BPF_OPCODE_CMP_IMM, \
ra, imm8, dst, SW64_BPF_FUNC_CMP_ULE)
#endif /* _SW64_BPF_JIT_H */
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