1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * BPF JIT compiler for ARM64
5 * Copyright (C) 2014-2016 Zi Shen Lim <zlim.lnx@gmail.com>
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
19 #define A64_VARIANT(sf) \
20 ((sf) ? AARCH64_INSN_VARIANT_64BIT : AARCH64_INSN_VARIANT_32BIT)
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)
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)
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)
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)
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)
69 /* Load/store register pair */
70 #define A64_LS_PAIR(Rt, Rt2, Rn, offset, ls, type) \
71 aarch64_insn_gen_load_store_pair(Rt, Rt2, Rn, offset, \
72 AARCH64_INSN_VARIANT_64BIT, \
73 AARCH64_INSN_LDST_##ls##_PAIR_##type)
74 /* Rn -= 16; Rn[0] = Rt; Rn[8] = Rt2; */
75 #define A64_PUSH(Rt, Rt2, Rn) A64_LS_PAIR(Rt, Rt2, Rn, -16, STORE, PRE_INDEX)
76 /* Rt = Rn[0]; Rt2 = Rn[8]; Rn += 16; */
77 #define A64_POP(Rt, Rt2, Rn) A64_LS_PAIR(Rt, Rt2, Rn, 16, LOAD, POST_INDEX)
79 /* Load/store exclusive */
80 #define A64_SIZE(sf) \
81 ((sf) ? AARCH64_INSN_SIZE_64 : AARCH64_INSN_SIZE_32)
82 #define A64_LSX(sf, Rt, Rn, Rs, type) \
83 aarch64_insn_gen_load_store_ex(Rt, Rn, Rs, A64_SIZE(sf), \
84 AARCH64_INSN_LDST_##type)
85 /* Rt = [Rn]; (atomic) */
86 #define A64_LDXR(sf, Rt, Rn) \
87 A64_LSX(sf, Rt, Rn, A64_ZR, LOAD_EX)
88 /* [Rn] = Rt; (atomic) Rs = [state] */
89 #define A64_STXR(sf, Rt, Rn, Rs) \
90 A64_LSX(sf, Rt, Rn, Rs, STORE_EX)
93 #define A64_STADD(sf, Rn, Rs) \
94 aarch64_insn_gen_stadd(Rn, Rs, A64_SIZE(sf))
96 /* Add/subtract (immediate) */
97 #define A64_ADDSUB_IMM(sf, Rd, Rn, imm12, type) \
98 aarch64_insn_gen_add_sub_imm(Rd, Rn, imm12, \
99 A64_VARIANT(sf), AARCH64_INSN_ADSB_##type)
100 /* Rd = Rn OP imm12 */
101 #define A64_ADD_I(sf, Rd, Rn, imm12) A64_ADDSUB_IMM(sf, Rd, Rn, imm12, ADD)
102 #define A64_SUB_I(sf, Rd, Rn, imm12) A64_ADDSUB_IMM(sf, Rd, Rn, imm12, SUB)
103 #define A64_ADDS_I(sf, Rd, Rn, imm12) \
104 A64_ADDSUB_IMM(sf, Rd, Rn, imm12, ADD_SETFLAGS)
105 #define A64_SUBS_I(sf, Rd, Rn, imm12) \
106 A64_ADDSUB_IMM(sf, Rd, Rn, imm12, SUB_SETFLAGS)
107 /* Rn + imm12; set condition flags */
108 #define A64_CMN_I(sf, Rn, imm12) A64_ADDS_I(sf, A64_ZR, Rn, imm12)
109 /* Rn - imm12; set condition flags */
110 #define A64_CMP_I(sf, Rn, imm12) A64_SUBS_I(sf, A64_ZR, Rn, imm12)
112 #define A64_MOV(sf, Rd, Rn) A64_ADD_I(sf, Rd, Rn, 0)
115 #define A64_BITFIELD(sf, Rd, Rn, immr, imms, type) \
116 aarch64_insn_gen_bitfield(Rd, Rn, immr, imms, \
117 A64_VARIANT(sf), AARCH64_INSN_BITFIELD_MOVE_##type)
118 /* Signed, with sign replication to left and zeros to right */
119 #define A64_SBFM(sf, Rd, Rn, ir, is) A64_BITFIELD(sf, Rd, Rn, ir, is, SIGNED)
120 /* Unsigned, with zeros to left and right */
121 #define A64_UBFM(sf, Rd, Rn, ir, is) A64_BITFIELD(sf, Rd, Rn, ir, is, UNSIGNED)
123 /* Rd = Rn << shift */
124 #define A64_LSL(sf, Rd, Rn, shift) ({ \
125 int sz = (sf) ? 64 : 32; \
126 A64_UBFM(sf, Rd, Rn, (unsigned)-(shift) % sz, sz - 1 - (shift)); \
128 /* Rd = Rn >> shift */
129 #define A64_LSR(sf, Rd, Rn, shift) A64_UBFM(sf, Rd, Rn, shift, (sf) ? 63 : 31)
130 /* Rd = Rn >> shift; signed */
131 #define A64_ASR(sf, Rd, Rn, shift) A64_SBFM(sf, Rd, Rn, shift, (sf) ? 63 : 31)
134 #define A64_UXTH(sf, Rd, Rn) A64_UBFM(sf, Rd, Rn, 0, 15)
135 #define A64_UXTW(sf, Rd, Rn) A64_UBFM(sf, Rd, Rn, 0, 31)
137 /* Move wide (immediate) */
138 #define A64_MOVEW(sf, Rd, imm16, shift, type) \
139 aarch64_insn_gen_movewide(Rd, imm16, shift, \
140 A64_VARIANT(sf), AARCH64_INSN_MOVEWIDE_##type)
141 /* Rd = Zeros (for MOVZ);
142 * Rd |= imm16 << shift (where shift is {0, 16, 32, 48});
143 * Rd = ~Rd; (for MOVN); */
144 #define A64_MOVN(sf, Rd, imm16, shift) A64_MOVEW(sf, Rd, imm16, shift, INVERSE)
145 #define A64_MOVZ(sf, Rd, imm16, shift) A64_MOVEW(sf, Rd, imm16, shift, ZERO)
146 #define A64_MOVK(sf, Rd, imm16, shift) A64_MOVEW(sf, Rd, imm16, shift, KEEP)
148 /* Add/subtract (shifted register) */
149 #define A64_ADDSUB_SREG(sf, Rd, Rn, Rm, type) \
150 aarch64_insn_gen_add_sub_shifted_reg(Rd, Rn, Rm, 0, \
151 A64_VARIANT(sf), AARCH64_INSN_ADSB_##type)
153 #define A64_ADD(sf, Rd, Rn, Rm) A64_ADDSUB_SREG(sf, Rd, Rn, Rm, ADD)
154 #define A64_SUB(sf, Rd, Rn, Rm) A64_ADDSUB_SREG(sf, Rd, Rn, Rm, SUB)
155 #define A64_SUBS(sf, Rd, Rn, Rm) A64_ADDSUB_SREG(sf, Rd, Rn, Rm, SUB_SETFLAGS)
157 #define A64_NEG(sf, Rd, Rm) A64_SUB(sf, Rd, A64_ZR, Rm)
158 /* Rn - Rm; set condition flags */
159 #define A64_CMP(sf, Rn, Rm) A64_SUBS(sf, A64_ZR, Rn, Rm)
161 /* Data-processing (1 source) */
162 #define A64_DATA1(sf, Rd, Rn, type) aarch64_insn_gen_data1(Rd, Rn, \
163 A64_VARIANT(sf), AARCH64_INSN_DATA1_##type)
164 /* Rd = BSWAPx(Rn) */
165 #define A64_REV16(sf, Rd, Rn) A64_DATA1(sf, Rd, Rn, REVERSE_16)
166 #define A64_REV32(sf, Rd, Rn) A64_DATA1(sf, Rd, Rn, REVERSE_32)
167 #define A64_REV64(Rd, Rn) A64_DATA1(1, Rd, Rn, REVERSE_64)
169 /* Data-processing (2 source) */
171 #define A64_DATA2(sf, Rd, Rn, Rm, type) aarch64_insn_gen_data2(Rd, Rn, Rm, \
172 A64_VARIANT(sf), AARCH64_INSN_DATA2_##type)
173 #define A64_UDIV(sf, Rd, Rn, Rm) A64_DATA2(sf, Rd, Rn, Rm, UDIV)
174 #define A64_LSLV(sf, Rd, Rn, Rm) A64_DATA2(sf, Rd, Rn, Rm, LSLV)
175 #define A64_LSRV(sf, Rd, Rn, Rm) A64_DATA2(sf, Rd, Rn, Rm, LSRV)
176 #define A64_ASRV(sf, Rd, Rn, Rm) A64_DATA2(sf, Rd, Rn, Rm, ASRV)
178 /* Data-processing (3 source) */
179 /* Rd = Ra + Rn * Rm */
180 #define A64_MADD(sf, Rd, Ra, Rn, Rm) aarch64_insn_gen_data3(Rd, Ra, Rn, Rm, \
181 A64_VARIANT(sf), AARCH64_INSN_DATA3_MADD)
182 /* Rd = Ra - Rn * Rm */
183 #define A64_MSUB(sf, Rd, Ra, Rn, Rm) aarch64_insn_gen_data3(Rd, Ra, Rn, Rm, \
184 A64_VARIANT(sf), AARCH64_INSN_DATA3_MSUB)
186 #define A64_MUL(sf, Rd, Rn, Rm) A64_MADD(sf, Rd, A64_ZR, Rn, Rm)
188 /* Logical (shifted register) */
189 #define A64_LOGIC_SREG(sf, Rd, Rn, Rm, type) \
190 aarch64_insn_gen_logical_shifted_reg(Rd, Rn, Rm, 0, \
191 A64_VARIANT(sf), AARCH64_INSN_LOGIC_##type)
193 #define A64_AND(sf, Rd, Rn, Rm) A64_LOGIC_SREG(sf, Rd, Rn, Rm, AND)
194 #define A64_ORR(sf, Rd, Rn, Rm) A64_LOGIC_SREG(sf, Rd, Rn, Rm, ORR)
195 #define A64_EOR(sf, Rd, Rn, Rm) A64_LOGIC_SREG(sf, Rd, Rn, Rm, EOR)
196 #define A64_ANDS(sf, Rd, Rn, Rm) A64_LOGIC_SREG(sf, Rd, Rn, Rm, AND_SETFLAGS)
197 /* Rn & Rm; set condition flags */
198 #define A64_TST(sf, Rn, Rm) A64_ANDS(sf, A64_ZR, Rn, Rm)
200 /* Logical (immediate) */
201 #define A64_LOGIC_IMM(sf, Rd, Rn, imm, type) ({ \
202 u64 imm64 = (sf) ? (u64)imm : (u64)(u32)imm; \
203 aarch64_insn_gen_logical_immediate(AARCH64_INSN_LOGIC_##type, \
204 A64_VARIANT(sf), Rn, Rd, imm64); \
207 #define A64_AND_I(sf, Rd, Rn, imm) A64_LOGIC_IMM(sf, Rd, Rn, imm, AND)
208 #define A64_ORR_I(sf, Rd, Rn, imm) A64_LOGIC_IMM(sf, Rd, Rn, imm, ORR)
209 #define A64_EOR_I(sf, Rd, Rn, imm) A64_LOGIC_IMM(sf, Rd, Rn, imm, EOR)
210 #define A64_ANDS_I(sf, Rd, Rn, imm) A64_LOGIC_IMM(sf, Rd, Rn, imm, AND_SETFLAGS)
211 /* Rn & imm; set condition flags */
212 #define A64_TST_I(sf, Rn, imm) A64_ANDS_I(sf, A64_ZR, Rn, imm)
215 #define A64_HINT(x) aarch64_insn_gen_hint(x)
218 #define A64_BTI_C A64_HINT(AARCH64_INSN_HINT_BTIC)
219 #define A64_BTI_J A64_HINT(AARCH64_INSN_HINT_BTIJ)
220 #define A64_BTI_JC A64_HINT(AARCH64_INSN_HINT_BTIJC)
222 #endif /* _BPF_JIT_H */