| /* |
| * BPF JIT compiler for ARM64 |
| * |
| * Copyright (C) 2014 Zi Shen Lim <zlim.lnx@gmail.com> |
| * |
| * 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 _BPF_JIT_H |
| #define _BPF_JIT_H |
| |
| #include <asm/insn.h> |
| |
| /* 5-bit Register Operand */ |
| #define A64_R(x) AARCH64_INSN_REG_##x |
| #define A64_FP AARCH64_INSN_REG_FP |
| #define A64_LR AARCH64_INSN_REG_LR |
| #define A64_ZR AARCH64_INSN_REG_ZR |
| #define A64_SP AARCH64_INSN_REG_SP |
| |
| #define A64_VARIANT(sf) \ |
| ((sf) ? AARCH64_INSN_VARIANT_64BIT : AARCH64_INSN_VARIANT_32BIT) |
| |
| /* Compare & branch (immediate) */ |
| #define A64_COMP_BRANCH(sf, Rt, offset, type) \ |
| aarch64_insn_gen_comp_branch_imm(0, offset, Rt, A64_VARIANT(sf), \ |
| AARCH64_INSN_BRANCH_COMP_##type) |
| #define A64_CBZ(sf, Rt, imm19) A64_COMP_BRANCH(sf, Rt, (imm19) << 2, ZERO) |
| |
| /* Conditional branch (immediate) */ |
| #define A64_COND_BRANCH(cond, offset) \ |
| aarch64_insn_gen_cond_branch_imm(0, offset, cond) |
| #define A64_COND_EQ AARCH64_INSN_COND_EQ /* == */ |
| #define A64_COND_NE AARCH64_INSN_COND_NE /* != */ |
| #define A64_COND_CS AARCH64_INSN_COND_CS /* unsigned >= */ |
| #define A64_COND_HI AARCH64_INSN_COND_HI /* unsigned > */ |
| #define A64_COND_GE AARCH64_INSN_COND_GE /* signed >= */ |
| #define A64_COND_GT AARCH64_INSN_COND_GT /* signed > */ |
| #define A64_B_(cond, imm19) A64_COND_BRANCH(cond, (imm19) << 2) |
| |
| /* Unconditional branch (immediate) */ |
| #define A64_BRANCH(offset, type) aarch64_insn_gen_branch_imm(0, offset, \ |
| AARCH64_INSN_BRANCH_##type) |
| #define A64_B(imm26) A64_BRANCH((imm26) << 2, NOLINK) |
| #define A64_BL(imm26) A64_BRANCH((imm26) << 2, LINK) |
| |
| /* Unconditional branch (register) */ |
| #define A64_BLR(Rn) aarch64_insn_gen_branch_reg(Rn, AARCH64_INSN_BRANCH_LINK) |
| #define A64_RET(Rn) aarch64_insn_gen_branch_reg(Rn, AARCH64_INSN_BRANCH_RETURN) |
| |
| /* Load/store register (register offset) */ |
| #define A64_LS_REG(Rt, Rn, Rm, size, type) \ |
| aarch64_insn_gen_load_store_reg(Rt, Rn, Rm, \ |
| AARCH64_INSN_SIZE_##size, \ |
| AARCH64_INSN_LDST_##type##_REG_OFFSET) |
| #define A64_STRB(Wt, Xn, Xm) A64_LS_REG(Wt, Xn, Xm, 8, STORE) |
| #define A64_LDRB(Wt, Xn, Xm) A64_LS_REG(Wt, Xn, Xm, 8, LOAD) |
| #define A64_STRH(Wt, Xn, Xm) A64_LS_REG(Wt, Xn, Xm, 16, STORE) |
| #define A64_LDRH(Wt, Xn, Xm) A64_LS_REG(Wt, Xn, Xm, 16, LOAD) |
| #define A64_STR32(Wt, Xn, Xm) A64_LS_REG(Wt, Xn, Xm, 32, STORE) |
| #define A64_LDR32(Wt, Xn, Xm) A64_LS_REG(Wt, Xn, Xm, 32, LOAD) |
| #define A64_STR64(Xt, Xn, Xm) A64_LS_REG(Xt, Xn, Xm, 64, STORE) |
| #define A64_LDR64(Xt, Xn, Xm) A64_LS_REG(Xt, Xn, Xm, 64, LOAD) |
| |
| /* Load/store register pair */ |
| #define A64_LS_PAIR(Rt, Rt2, Rn, offset, ls, type) \ |
| aarch64_insn_gen_load_store_pair(Rt, Rt2, Rn, offset, \ |
| AARCH64_INSN_VARIANT_64BIT, \ |
| AARCH64_INSN_LDST_##ls##_PAIR_##type) |
| /* Rn -= 16; Rn[0] = Rt; Rn[8] = Rt2; */ |
| #define A64_PUSH(Rt, Rt2, Rn) A64_LS_PAIR(Rt, Rt2, Rn, -16, STORE, PRE_INDEX) |
| /* Rt = Rn[0]; Rt2 = Rn[8]; Rn += 16; */ |
| #define A64_POP(Rt, Rt2, Rn) A64_LS_PAIR(Rt, Rt2, Rn, 16, LOAD, POST_INDEX) |
| |
| /* Add/subtract (immediate) */ |
| #define A64_ADDSUB_IMM(sf, Rd, Rn, imm12, type) \ |
| aarch64_insn_gen_add_sub_imm(Rd, Rn, imm12, \ |
| A64_VARIANT(sf), AARCH64_INSN_ADSB_##type) |
| /* Rd = Rn OP imm12 */ |
| #define A64_ADD_I(sf, Rd, Rn, imm12) A64_ADDSUB_IMM(sf, Rd, Rn, imm12, ADD) |
| #define A64_SUB_I(sf, Rd, Rn, imm12) A64_ADDSUB_IMM(sf, Rd, Rn, imm12, SUB) |
| /* Rd = Rn */ |
| #define A64_MOV(sf, Rd, Rn) A64_ADD_I(sf, Rd, Rn, 0) |
| |
| /* Bitfield move */ |
| #define A64_BITFIELD(sf, Rd, Rn, immr, imms, type) \ |
| aarch64_insn_gen_bitfield(Rd, Rn, immr, imms, \ |
| A64_VARIANT(sf), AARCH64_INSN_BITFIELD_MOVE_##type) |
| /* Signed, with sign replication to left and zeros to right */ |
| #define A64_SBFM(sf, Rd, Rn, ir, is) A64_BITFIELD(sf, Rd, Rn, ir, is, SIGNED) |
| /* Unsigned, with zeros to left and right */ |
| #define A64_UBFM(sf, Rd, Rn, ir, is) A64_BITFIELD(sf, Rd, Rn, ir, is, UNSIGNED) |
| |
| /* Rd = Rn << shift */ |
| #define A64_LSL(sf, Rd, Rn, shift) ({ \ |
| int sz = (sf) ? 64 : 32; \ |
| A64_UBFM(sf, Rd, Rn, (unsigned)-(shift) % sz, sz - 1 - (shift)); \ |
| }) |
| /* Rd = Rn >> shift */ |
| #define A64_LSR(sf, Rd, Rn, shift) A64_UBFM(sf, Rd, Rn, shift, (sf) ? 63 : 31) |
| /* Rd = Rn >> shift; signed */ |
| #define A64_ASR(sf, Rd, Rn, shift) A64_SBFM(sf, Rd, Rn, shift, (sf) ? 63 : 31) |
| |
| /* Zero extend */ |
| #define A64_UXTH(sf, Rd, Rn) A64_UBFM(sf, Rd, Rn, 0, 15) |
| #define A64_UXTW(sf, Rd, Rn) A64_UBFM(sf, Rd, Rn, 0, 31) |
| |
| /* Move wide (immediate) */ |
| #define A64_MOVEW(sf, Rd, imm16, shift, type) \ |
| aarch64_insn_gen_movewide(Rd, imm16, shift, \ |
| A64_VARIANT(sf), AARCH64_INSN_MOVEWIDE_##type) |
| /* Rd = Zeros (for MOVZ); |
| * Rd |= imm16 << shift (where shift is {0, 16, 32, 48}); |
| * Rd = ~Rd; (for MOVN); */ |
| #define A64_MOVN(sf, Rd, imm16, shift) A64_MOVEW(sf, Rd, imm16, shift, INVERSE) |
| #define A64_MOVZ(sf, Rd, imm16, shift) A64_MOVEW(sf, Rd, imm16, shift, ZERO) |
| #define A64_MOVK(sf, Rd, imm16, shift) A64_MOVEW(sf, Rd, imm16, shift, KEEP) |
| |
| /* Add/subtract (shifted register) */ |
| #define A64_ADDSUB_SREG(sf, Rd, Rn, Rm, type) \ |
| aarch64_insn_gen_add_sub_shifted_reg(Rd, Rn, Rm, 0, \ |
| A64_VARIANT(sf), AARCH64_INSN_ADSB_##type) |
| /* Rd = Rn OP Rm */ |
| #define A64_ADD(sf, Rd, Rn, Rm) A64_ADDSUB_SREG(sf, Rd, Rn, Rm, ADD) |
| #define A64_SUB(sf, Rd, Rn, Rm) A64_ADDSUB_SREG(sf, Rd, Rn, Rm, SUB) |
| #define A64_SUBS(sf, Rd, Rn, Rm) A64_ADDSUB_SREG(sf, Rd, Rn, Rm, SUB_SETFLAGS) |
| /* Rd = -Rm */ |
| #define A64_NEG(sf, Rd, Rm) A64_SUB(sf, Rd, A64_ZR, Rm) |
| /* Rn - Rm; set condition flags */ |
| #define A64_CMP(sf, Rn, Rm) A64_SUBS(sf, A64_ZR, Rn, Rm) |
| |
| /* Data-processing (1 source) */ |
| #define A64_DATA1(sf, Rd, Rn, type) aarch64_insn_gen_data1(Rd, Rn, \ |
| A64_VARIANT(sf), AARCH64_INSN_DATA1_##type) |
| /* Rd = BSWAPx(Rn) */ |
| #define A64_REV16(sf, Rd, Rn) A64_DATA1(sf, Rd, Rn, REVERSE_16) |
| #define A64_REV32(sf, Rd, Rn) A64_DATA1(sf, Rd, Rn, REVERSE_32) |
| #define A64_REV64(Rd, Rn) A64_DATA1(1, Rd, Rn, REVERSE_64) |
| |
| /* Data-processing (2 source) */ |
| /* Rd = Rn OP Rm */ |
| #define A64_DATA2(sf, Rd, Rn, Rm, type) aarch64_insn_gen_data2(Rd, Rn, Rm, \ |
| A64_VARIANT(sf), AARCH64_INSN_DATA2_##type) |
| #define A64_UDIV(sf, Rd, Rn, Rm) A64_DATA2(sf, Rd, Rn, Rm, UDIV) |
| #define A64_LSLV(sf, Rd, Rn, Rm) A64_DATA2(sf, Rd, Rn, Rm, LSLV) |
| #define A64_LSRV(sf, Rd, Rn, Rm) A64_DATA2(sf, Rd, Rn, Rm, LSRV) |
| #define A64_ASRV(sf, Rd, Rn, Rm) A64_DATA2(sf, Rd, Rn, Rm, ASRV) |
| |
| /* Data-processing (3 source) */ |
| /* Rd = Ra + Rn * Rm */ |
| #define A64_MADD(sf, Rd, Ra, Rn, Rm) aarch64_insn_gen_data3(Rd, Ra, Rn, Rm, \ |
| A64_VARIANT(sf), AARCH64_INSN_DATA3_MADD) |
| /* Rd = Rn * Rm */ |
| #define A64_MUL(sf, Rd, Rn, Rm) A64_MADD(sf, Rd, A64_ZR, Rn, Rm) |
| |
| /* Logical (shifted register) */ |
| #define A64_LOGIC_SREG(sf, Rd, Rn, Rm, type) \ |
| aarch64_insn_gen_logical_shifted_reg(Rd, Rn, Rm, 0, \ |
| A64_VARIANT(sf), AARCH64_INSN_LOGIC_##type) |
| /* Rd = Rn OP Rm */ |
| #define A64_AND(sf, Rd, Rn, Rm) A64_LOGIC_SREG(sf, Rd, Rn, Rm, AND) |
| #define A64_ORR(sf, Rd, Rn, Rm) A64_LOGIC_SREG(sf, Rd, Rn, Rm, ORR) |
| #define A64_EOR(sf, Rd, Rn, Rm) A64_LOGIC_SREG(sf, Rd, Rn, Rm, EOR) |
| #define A64_ANDS(sf, Rd, Rn, Rm) A64_LOGIC_SREG(sf, Rd, Rn, Rm, AND_SETFLAGS) |
| /* Rn & Rm; set condition flags */ |
| #define A64_TST(sf, Rn, Rm) A64_ANDS(sf, A64_ZR, Rn, Rm) |
| |
| #endif /* _BPF_JIT_H */ |
