1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * BPF JIT compiler for ARM64 4 * 5 * Copyright (C) 2014-2016 Zi Shen Lim <zlim.lnx@gmail.com> 6 */ 7 #ifndef _BPF_JIT_H 8 #define _BPF_JIT_H 9 10 #include <asm/insn.h> 11 12 /* 5-bit Register Operand */ 13 #define A64_R(x) AARCH64_INSN_REG_##x 14 #define A64_FP AARCH64_INSN_REG_FP 15 #define A64_LR AARCH64_INSN_REG_LR 16 #define A64_ZR AARCH64_INSN_REG_ZR 17 #define A64_SP AARCH64_INSN_REG_SP 18 19 #define A64_VARIANT(sf) \ 20 ((sf) ? AARCH64_INSN_VARIANT_64BIT : AARCH64_INSN_VARIANT_32BIT) 21 22 /* Compare & branch (immediate) */ 23 #define A64_COMP_BRANCH(sf, Rt, offset, type) \ 24 aarch64_insn_gen_comp_branch_imm(0, offset, Rt, A64_VARIANT(sf), \ 25 AARCH64_INSN_BRANCH_COMP_##type) 26 #define A64_CBZ(sf, Rt, imm19) A64_COMP_BRANCH(sf, Rt, (imm19) << 2, ZERO) 27 #define A64_CBNZ(sf, Rt, imm19) A64_COMP_BRANCH(sf, Rt, (imm19) << 2, NONZERO) 28 29 /* Conditional branch (immediate) */ 30 #define A64_COND_BRANCH(cond, offset) \ 31 aarch64_insn_gen_cond_branch_imm(0, offset, cond) 32 #define A64_COND_EQ AARCH64_INSN_COND_EQ /* == */ 33 #define A64_COND_NE AARCH64_INSN_COND_NE /* != */ 34 #define A64_COND_CS AARCH64_INSN_COND_CS /* unsigned >= */ 35 #define A64_COND_HI AARCH64_INSN_COND_HI /* unsigned > */ 36 #define A64_COND_LS AARCH64_INSN_COND_LS /* unsigned <= */ 37 #define A64_COND_CC AARCH64_INSN_COND_CC /* unsigned < */ 38 #define A64_COND_GE AARCH64_INSN_COND_GE /* signed >= */ 39 #define A64_COND_GT AARCH64_INSN_COND_GT /* signed > */ 40 #define A64_COND_LE AARCH64_INSN_COND_LE /* signed <= */ 41 #define A64_COND_LT AARCH64_INSN_COND_LT /* signed < */ 42 #define A64_B_(cond, imm19) A64_COND_BRANCH(cond, (imm19) << 2) 43 44 /* Unconditional branch (immediate) */ 45 #define A64_BRANCH(offset, type) aarch64_insn_gen_branch_imm(0, offset, \ 46 AARCH64_INSN_BRANCH_##type) 47 #define A64_B(imm26) A64_BRANCH((imm26) << 2, NOLINK) 48 #define A64_BL(imm26) A64_BRANCH((imm26) << 2, LINK) 49 50 /* Unconditional branch (register) */ 51 #define A64_BR(Rn) aarch64_insn_gen_branch_reg(Rn, AARCH64_INSN_BRANCH_NOLINK) 52 #define A64_BLR(Rn) aarch64_insn_gen_branch_reg(Rn, AARCH64_INSN_BRANCH_LINK) 53 #define A64_RET(Rn) aarch64_insn_gen_branch_reg(Rn, AARCH64_INSN_BRANCH_RETURN) 54 55 /* Load/store register (register offset) */ 56 #define A64_LS_REG(Rt, Rn, Rm, size, type) \ 57 aarch64_insn_gen_load_store_reg(Rt, Rn, Rm, \ 58 AARCH64_INSN_SIZE_##size, \ 59 AARCH64_INSN_LDST_##type##_REG_OFFSET) 60 #define A64_STRB(Wt, Xn, Xm) A64_LS_REG(Wt, Xn, Xm, 8, STORE) 61 #define A64_LDRB(Wt, Xn, Xm) A64_LS_REG(Wt, Xn, Xm, 8, LOAD) 62 #define A64_STRH(Wt, Xn, Xm) A64_LS_REG(Wt, Xn, Xm, 16, STORE) 63 #define A64_LDRH(Wt, Xn, Xm) A64_LS_REG(Wt, Xn, Xm, 16, LOAD) 64 #define A64_STR32(Wt, Xn, Xm) A64_LS_REG(Wt, Xn, Xm, 32, STORE) 65 #define A64_LDR32(Wt, Xn, Xm) A64_LS_REG(Wt, Xn, Xm, 32, LOAD) 66 #define A64_STR64(Xt, Xn, Xm) A64_LS_REG(Xt, Xn, Xm, 64, STORE) 67 #define A64_LDR64(Xt, Xn, Xm) A64_LS_REG(Xt, Xn, Xm, 64, LOAD) 68 69 /* Load/store register (immediate offset) */ 70 #define A64_LS_IMM(Rt, Rn, imm, size, type) \ 71 aarch64_insn_gen_load_store_imm(Rt, Rn, imm, \ 72 AARCH64_INSN_SIZE_##size, \ 73 AARCH64_INSN_LDST_##type##_IMM_OFFSET) 74 #define A64_STRBI(Wt, Xn, imm) A64_LS_IMM(Wt, Xn, imm, 8, STORE) 75 #define A64_LDRBI(Wt, Xn, imm) A64_LS_IMM(Wt, Xn, imm, 8, LOAD) 76 #define A64_STRHI(Wt, Xn, imm) A64_LS_IMM(Wt, Xn, imm, 16, STORE) 77 #define A64_LDRHI(Wt, Xn, imm) A64_LS_IMM(Wt, Xn, imm, 16, LOAD) 78 #define A64_STR32I(Wt, Xn, imm) A64_LS_IMM(Wt, Xn, imm, 32, STORE) 79 #define A64_LDR32I(Wt, Xn, imm) A64_LS_IMM(Wt, Xn, imm, 32, LOAD) 80 #define A64_STR64I(Xt, Xn, imm) A64_LS_IMM(Xt, Xn, imm, 64, STORE) 81 #define A64_LDR64I(Xt, Xn, imm) A64_LS_IMM(Xt, Xn, imm, 64, LOAD) 82 83 /* LDR (literal) */ 84 #define A64_LDR32LIT(Wt, offset) \ 85 aarch64_insn_gen_load_literal(0, offset, Wt, false) 86 #define A64_LDR64LIT(Xt, offset) \ 87 aarch64_insn_gen_load_literal(0, offset, Xt, true) 88 89 /* Load/store register pair */ 90 #define A64_LS_PAIR(Rt, Rt2, Rn, offset, ls, type) \ 91 aarch64_insn_gen_load_store_pair(Rt, Rt2, Rn, offset, \ 92 AARCH64_INSN_VARIANT_64BIT, \ 93 AARCH64_INSN_LDST_##ls##_PAIR_##type) 94 /* Rn -= 16; Rn[0] = Rt; Rn[8] = Rt2; */ 95 #define A64_PUSH(Rt, Rt2, Rn) A64_LS_PAIR(Rt, Rt2, Rn, -16, STORE, PRE_INDEX) 96 /* Rt = Rn[0]; Rt2 = Rn[8]; Rn += 16; */ 97 #define A64_POP(Rt, Rt2, Rn) A64_LS_PAIR(Rt, Rt2, Rn, 16, LOAD, POST_INDEX) 98 99 /* Load/store exclusive */ 100 #define A64_SIZE(sf) \ 101 ((sf) ? AARCH64_INSN_SIZE_64 : AARCH64_INSN_SIZE_32) 102 #define A64_LSX(sf, Rt, Rn, Rs, type) \ 103 aarch64_insn_gen_load_store_ex(Rt, Rn, Rs, A64_SIZE(sf), \ 104 AARCH64_INSN_LDST_##type) 105 /* Rt = [Rn]; (atomic) */ 106 #define A64_LDXR(sf, Rt, Rn) \ 107 A64_LSX(sf, Rt, Rn, A64_ZR, LOAD_EX) 108 /* [Rn] = Rt; (atomic) Rs = [state] */ 109 #define A64_STXR(sf, Rt, Rn, Rs) \ 110 A64_LSX(sf, Rt, Rn, Rs, STORE_EX) 111 /* [Rn] = Rt (store release); (atomic) Rs = [state] */ 112 #define A64_STLXR(sf, Rt, Rn, Rs) \ 113 aarch64_insn_gen_load_store_ex(Rt, Rn, Rs, A64_SIZE(sf), \ 114 AARCH64_INSN_LDST_STORE_REL_EX) 115 116 /* 117 * LSE atomics 118 * 119 * ST{ADD,CLR,SET,EOR} is simply encoded as an alias for 120 * LDD{ADD,CLR,SET,EOR} with XZR as the destination register. 121 */ 122 #define A64_ST_OP(sf, Rn, Rs, op) \ 123 aarch64_insn_gen_atomic_ld_op(A64_ZR, Rn, Rs, \ 124 A64_SIZE(sf), AARCH64_INSN_MEM_ATOMIC_##op, \ 125 AARCH64_INSN_MEM_ORDER_NONE) 126 /* [Rn] <op>= Rs */ 127 #define A64_STADD(sf, Rn, Rs) A64_ST_OP(sf, Rn, Rs, ADD) 128 #define A64_STCLR(sf, Rn, Rs) A64_ST_OP(sf, Rn, Rs, CLR) 129 #define A64_STEOR(sf, Rn, Rs) A64_ST_OP(sf, Rn, Rs, EOR) 130 #define A64_STSET(sf, Rn, Rs) A64_ST_OP(sf, Rn, Rs, SET) 131 132 #define A64_LD_OP_AL(sf, Rt, Rn, Rs, op) \ 133 aarch64_insn_gen_atomic_ld_op(Rt, Rn, Rs, \ 134 A64_SIZE(sf), AARCH64_INSN_MEM_ATOMIC_##op, \ 135 AARCH64_INSN_MEM_ORDER_ACQREL) 136 /* Rt = [Rn] (load acquire); [Rn] <op>= Rs (store release) */ 137 #define A64_LDADDAL(sf, Rt, Rn, Rs) A64_LD_OP_AL(sf, Rt, Rn, Rs, ADD) 138 #define A64_LDCLRAL(sf, Rt, Rn, Rs) A64_LD_OP_AL(sf, Rt, Rn, Rs, CLR) 139 #define A64_LDEORAL(sf, Rt, Rn, Rs) A64_LD_OP_AL(sf, Rt, Rn, Rs, EOR) 140 #define A64_LDSETAL(sf, Rt, Rn, Rs) A64_LD_OP_AL(sf, Rt, Rn, Rs, SET) 141 /* Rt = [Rn] (load acquire); [Rn] = Rs (store release) */ 142 #define A64_SWPAL(sf, Rt, Rn, Rs) A64_LD_OP_AL(sf, Rt, Rn, Rs, SWP) 143 /* Rs = CAS(Rn, Rs, Rt) (load acquire & store release) */ 144 #define A64_CASAL(sf, Rt, Rn, Rs) \ 145 aarch64_insn_gen_cas(Rt, Rn, Rs, A64_SIZE(sf), \ 146 AARCH64_INSN_MEM_ORDER_ACQREL) 147 148 /* Add/subtract (immediate) */ 149 #define A64_ADDSUB_IMM(sf, Rd, Rn, imm12, type) \ 150 aarch64_insn_gen_add_sub_imm(Rd, Rn, imm12, \ 151 A64_VARIANT(sf), AARCH64_INSN_ADSB_##type) 152 /* Rd = Rn OP imm12 */ 153 #define A64_ADD_I(sf, Rd, Rn, imm12) A64_ADDSUB_IMM(sf, Rd, Rn, imm12, ADD) 154 #define A64_SUB_I(sf, Rd, Rn, imm12) A64_ADDSUB_IMM(sf, Rd, Rn, imm12, SUB) 155 #define A64_ADDS_I(sf, Rd, Rn, imm12) \ 156 A64_ADDSUB_IMM(sf, Rd, Rn, imm12, ADD_SETFLAGS) 157 #define A64_SUBS_I(sf, Rd, Rn, imm12) \ 158 A64_ADDSUB_IMM(sf, Rd, Rn, imm12, SUB_SETFLAGS) 159 /* Rn + imm12; set condition flags */ 160 #define A64_CMN_I(sf, Rn, imm12) A64_ADDS_I(sf, A64_ZR, Rn, imm12) 161 /* Rn - imm12; set condition flags */ 162 #define A64_CMP_I(sf, Rn, imm12) A64_SUBS_I(sf, A64_ZR, Rn, imm12) 163 /* Rd = Rn */ 164 #define A64_MOV(sf, Rd, Rn) A64_ADD_I(sf, Rd, Rn, 0) 165 166 /* Bitfield move */ 167 #define A64_BITFIELD(sf, Rd, Rn, immr, imms, type) \ 168 aarch64_insn_gen_bitfield(Rd, Rn, immr, imms, \ 169 A64_VARIANT(sf), AARCH64_INSN_BITFIELD_MOVE_##type) 170 /* Signed, with sign replication to left and zeros to right */ 171 #define A64_SBFM(sf, Rd, Rn, ir, is) A64_BITFIELD(sf, Rd, Rn, ir, is, SIGNED) 172 /* Unsigned, with zeros to left and right */ 173 #define A64_UBFM(sf, Rd, Rn, ir, is) A64_BITFIELD(sf, Rd, Rn, ir, is, UNSIGNED) 174 175 /* Rd = Rn << shift */ 176 #define A64_LSL(sf, Rd, Rn, shift) ({ \ 177 int sz = (sf) ? 64 : 32; \ 178 A64_UBFM(sf, Rd, Rn, (unsigned)-(shift) % sz, sz - 1 - (shift)); \ 179 }) 180 /* Rd = Rn >> shift */ 181 #define A64_LSR(sf, Rd, Rn, shift) A64_UBFM(sf, Rd, Rn, shift, (sf) ? 63 : 31) 182 /* Rd = Rn >> shift; signed */ 183 #define A64_ASR(sf, Rd, Rn, shift) A64_SBFM(sf, Rd, Rn, shift, (sf) ? 63 : 31) 184 185 /* Zero extend */ 186 #define A64_UXTH(sf, Rd, Rn) A64_UBFM(sf, Rd, Rn, 0, 15) 187 #define A64_UXTW(sf, Rd, Rn) A64_UBFM(sf, Rd, Rn, 0, 31) 188 189 /* Move wide (immediate) */ 190 #define A64_MOVEW(sf, Rd, imm16, shift, type) \ 191 aarch64_insn_gen_movewide(Rd, imm16, shift, \ 192 A64_VARIANT(sf), AARCH64_INSN_MOVEWIDE_##type) 193 /* Rd = Zeros (for MOVZ); 194 * Rd |= imm16 << shift (where shift is {0, 16, 32, 48}); 195 * Rd = ~Rd; (for MOVN); */ 196 #define A64_MOVN(sf, Rd, imm16, shift) A64_MOVEW(sf, Rd, imm16, shift, INVERSE) 197 #define A64_MOVZ(sf, Rd, imm16, shift) A64_MOVEW(sf, Rd, imm16, shift, ZERO) 198 #define A64_MOVK(sf, Rd, imm16, shift) A64_MOVEW(sf, Rd, imm16, shift, KEEP) 199 200 /* Add/subtract (shifted register) */ 201 #define A64_ADDSUB_SREG(sf, Rd, Rn, Rm, type) \ 202 aarch64_insn_gen_add_sub_shifted_reg(Rd, Rn, Rm, 0, \ 203 A64_VARIANT(sf), AARCH64_INSN_ADSB_##type) 204 /* Rd = Rn OP Rm */ 205 #define A64_ADD(sf, Rd, Rn, Rm) A64_ADDSUB_SREG(sf, Rd, Rn, Rm, ADD) 206 #define A64_SUB(sf, Rd, Rn, Rm) A64_ADDSUB_SREG(sf, Rd, Rn, Rm, SUB) 207 #define A64_SUBS(sf, Rd, Rn, Rm) A64_ADDSUB_SREG(sf, Rd, Rn, Rm, SUB_SETFLAGS) 208 /* Rd = -Rm */ 209 #define A64_NEG(sf, Rd, Rm) A64_SUB(sf, Rd, A64_ZR, Rm) 210 /* Rn - Rm; set condition flags */ 211 #define A64_CMP(sf, Rn, Rm) A64_SUBS(sf, A64_ZR, Rn, Rm) 212 213 /* Data-processing (1 source) */ 214 #define A64_DATA1(sf, Rd, Rn, type) aarch64_insn_gen_data1(Rd, Rn, \ 215 A64_VARIANT(sf), AARCH64_INSN_DATA1_##type) 216 /* Rd = BSWAPx(Rn) */ 217 #define A64_REV16(sf, Rd, Rn) A64_DATA1(sf, Rd, Rn, REVERSE_16) 218 #define A64_REV32(sf, Rd, Rn) A64_DATA1(sf, Rd, Rn, REVERSE_32) 219 #define A64_REV64(Rd, Rn) A64_DATA1(1, Rd, Rn, REVERSE_64) 220 221 /* Data-processing (2 source) */ 222 /* Rd = Rn OP Rm */ 223 #define A64_DATA2(sf, Rd, Rn, Rm, type) aarch64_insn_gen_data2(Rd, Rn, Rm, \ 224 A64_VARIANT(sf), AARCH64_INSN_DATA2_##type) 225 #define A64_UDIV(sf, Rd, Rn, Rm) A64_DATA2(sf, Rd, Rn, Rm, UDIV) 226 #define A64_LSLV(sf, Rd, Rn, Rm) A64_DATA2(sf, Rd, Rn, Rm, LSLV) 227 #define A64_LSRV(sf, Rd, Rn, Rm) A64_DATA2(sf, Rd, Rn, Rm, LSRV) 228 #define A64_ASRV(sf, Rd, Rn, Rm) A64_DATA2(sf, Rd, Rn, Rm, ASRV) 229 230 /* Data-processing (3 source) */ 231 /* Rd = Ra + Rn * Rm */ 232 #define A64_MADD(sf, Rd, Ra, Rn, Rm) aarch64_insn_gen_data3(Rd, Ra, Rn, Rm, \ 233 A64_VARIANT(sf), AARCH64_INSN_DATA3_MADD) 234 /* Rd = Ra - Rn * Rm */ 235 #define A64_MSUB(sf, Rd, Ra, Rn, Rm) aarch64_insn_gen_data3(Rd, Ra, Rn, Rm, \ 236 A64_VARIANT(sf), AARCH64_INSN_DATA3_MSUB) 237 /* Rd = Rn * Rm */ 238 #define A64_MUL(sf, Rd, Rn, Rm) A64_MADD(sf, Rd, A64_ZR, Rn, Rm) 239 240 /* Logical (shifted register) */ 241 #define A64_LOGIC_SREG(sf, Rd, Rn, Rm, type) \ 242 aarch64_insn_gen_logical_shifted_reg(Rd, Rn, Rm, 0, \ 243 A64_VARIANT(sf), AARCH64_INSN_LOGIC_##type) 244 /* Rd = Rn OP Rm */ 245 #define A64_AND(sf, Rd, Rn, Rm) A64_LOGIC_SREG(sf, Rd, Rn, Rm, AND) 246 #define A64_ORR(sf, Rd, Rn, Rm) A64_LOGIC_SREG(sf, Rd, Rn, Rm, ORR) 247 #define A64_EOR(sf, Rd, Rn, Rm) A64_LOGIC_SREG(sf, Rd, Rn, Rm, EOR) 248 #define A64_ANDS(sf, Rd, Rn, Rm) A64_LOGIC_SREG(sf, Rd, Rn, Rm, AND_SETFLAGS) 249 /* Rn & Rm; set condition flags */ 250 #define A64_TST(sf, Rn, Rm) A64_ANDS(sf, A64_ZR, Rn, Rm) 251 /* Rd = ~Rm (alias of ORN with A64_ZR as Rn) */ 252 #define A64_MVN(sf, Rd, Rm) \ 253 A64_LOGIC_SREG(sf, Rd, A64_ZR, Rm, ORN) 254 255 /* Logical (immediate) */ 256 #define A64_LOGIC_IMM(sf, Rd, Rn, imm, type) ({ \ 257 u64 imm64 = (sf) ? (u64)imm : (u64)(u32)imm; \ 258 aarch64_insn_gen_logical_immediate(AARCH64_INSN_LOGIC_##type, \ 259 A64_VARIANT(sf), Rn, Rd, imm64); \ 260 }) 261 /* Rd = Rn OP imm */ 262 #define A64_AND_I(sf, Rd, Rn, imm) A64_LOGIC_IMM(sf, Rd, Rn, imm, AND) 263 #define A64_ORR_I(sf, Rd, Rn, imm) A64_LOGIC_IMM(sf, Rd, Rn, imm, ORR) 264 #define A64_EOR_I(sf, Rd, Rn, imm) A64_LOGIC_IMM(sf, Rd, Rn, imm, EOR) 265 #define A64_ANDS_I(sf, Rd, Rn, imm) A64_LOGIC_IMM(sf, Rd, Rn, imm, AND_SETFLAGS) 266 /* Rn & imm; set condition flags */ 267 #define A64_TST_I(sf, Rn, imm) A64_ANDS_I(sf, A64_ZR, Rn, imm) 268 269 /* HINTs */ 270 #define A64_HINT(x) aarch64_insn_gen_hint(x) 271 272 #define A64_PACIASP A64_HINT(AARCH64_INSN_HINT_PACIASP) 273 #define A64_AUTIASP A64_HINT(AARCH64_INSN_HINT_AUTIASP) 274 275 /* BTI */ 276 #define A64_BTI_C A64_HINT(AARCH64_INSN_HINT_BTIC) 277 #define A64_BTI_J A64_HINT(AARCH64_INSN_HINT_BTIJ) 278 #define A64_BTI_JC A64_HINT(AARCH64_INSN_HINT_BTIJC) 279 #define A64_NOP A64_HINT(AARCH64_INSN_HINT_NOP) 280 281 /* DMB */ 282 #define A64_DMB_ISH aarch64_insn_gen_dmb(AARCH64_INSN_MB_ISH) 283 284 #endif /* _BPF_JIT_H */ 285