1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
|
//===-- RISCVInstrInfoA.td - RISC-V 'A' instructions -------*- tablegen -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file describes the RISC-V instructions from the standard 'A', Atomic
// Instructions extension.
//
//===----------------------------------------------------------------------===//
//===----------------------------------------------------------------------===//
// Instruction class templates
//===----------------------------------------------------------------------===//
let hasSideEffects = 0, mayLoad = 1, mayStore = 0 in
class LR_r<bit aq, bit rl, bits<3> funct3, string opcodestr>
: RVInstRAtomic<0b00010, aq, rl, funct3, OPC_AMO,
(outs GPR:$rd), (ins GPR:$rs1),
opcodestr, "$rd, (${rs1})"> {
let rs2 = 0;
}
multiclass LR_r_aq_rl<bits<3> funct3, string opcodestr> {
def "" : LR_r<0, 0, funct3, opcodestr>;
def _AQ : LR_r<1, 0, funct3, opcodestr # ".aq">;
def _RL : LR_r<0, 1, funct3, opcodestr # ".rl">;
def _AQ_RL : LR_r<1, 1, funct3, opcodestr # ".aqrl">;
}
let hasSideEffects = 0, mayLoad = 1, mayStore = 1 in
class AMO_rr<bits<5> funct5, bit aq, bit rl, bits<3> funct3, string opcodestr>
: RVInstRAtomic<funct5, aq, rl, funct3, OPC_AMO,
(outs GPR:$rd), (ins GPR:$rs1, GPR:$rs2),
opcodestr, "$rd, $rs2, (${rs1})">;
multiclass AMO_rr_aq_rl<bits<5> funct5, bits<3> funct3, string opcodestr> {
def "" : AMO_rr<funct5, 0, 0, funct3, opcodestr>;
def _AQ : AMO_rr<funct5, 1, 0, funct3, opcodestr # ".aq">;
def _RL : AMO_rr<funct5, 0, 1, funct3, opcodestr # ".rl">;
def _AQ_RL : AMO_rr<funct5, 1, 1, funct3, opcodestr # ".aqrl">;
}
multiclass AtomicStPat<PatFrag StoreOp, RVInst Inst, RegisterClass StTy> {
def : Pat<(StoreOp GPR:$rs1, StTy:$rs2), (Inst StTy:$rs2, GPR:$rs1, 0)>;
def : Pat<(StoreOp AddrFI:$rs1, StTy:$rs2), (Inst StTy:$rs2, AddrFI:$rs1, 0)>;
def : Pat<(StoreOp (add GPR:$rs1, simm12:$imm12), StTy:$rs2),
(Inst StTy:$rs2, GPR:$rs1, simm12:$imm12)>;
def : Pat<(StoreOp (add AddrFI:$rs1, simm12:$imm12), StTy:$rs2),
(Inst StTy:$rs2, AddrFI:$rs1, simm12:$imm12)>;
def : Pat<(StoreOp (IsOrAdd AddrFI:$rs1, simm12:$imm12), StTy:$rs2),
(Inst StTy:$rs2, AddrFI:$rs1, simm12:$imm12)>;
}
//===----------------------------------------------------------------------===//
// Instructions
//===----------------------------------------------------------------------===//
let Predicates = [HasStdExtA] in {
defm LR_W : LR_r_aq_rl<0b010, "lr.w">;
defm SC_W : AMO_rr_aq_rl<0b00011, 0b010, "sc.w">;
defm AMOSWAP_W : AMO_rr_aq_rl<0b00001, 0b010, "amoswap.w">;
defm AMOADD_W : AMO_rr_aq_rl<0b00000, 0b010, "amoadd.w">;
defm AMOXOR_W : AMO_rr_aq_rl<0b00100, 0b010, "amoxor.w">;
defm AMOAND_W : AMO_rr_aq_rl<0b01100, 0b010, "amoand.w">;
defm AMOOR_W : AMO_rr_aq_rl<0b01000, 0b010, "amoor.w">;
defm AMOMIN_W : AMO_rr_aq_rl<0b10000, 0b010, "amomin.w">;
defm AMOMAX_W : AMO_rr_aq_rl<0b10100, 0b010, "amomax.w">;
defm AMOMINU_W : AMO_rr_aq_rl<0b11000, 0b010, "amominu.w">;
defm AMOMAXU_W : AMO_rr_aq_rl<0b11100, 0b010, "amomaxu.w">;
} // Predicates = [HasStdExtA]
let Predicates = [HasStdExtA, IsRV64] in {
defm LR_D : LR_r_aq_rl<0b011, "lr.d">;
defm SC_D : AMO_rr_aq_rl<0b00011, 0b011, "sc.d">;
defm AMOSWAP_D : AMO_rr_aq_rl<0b00001, 0b011, "amoswap.d">;
defm AMOADD_D : AMO_rr_aq_rl<0b00000, 0b011, "amoadd.d">;
defm AMOXOR_D : AMO_rr_aq_rl<0b00100, 0b011, "amoxor.d">;
defm AMOAND_D : AMO_rr_aq_rl<0b01100, 0b011, "amoand.d">;
defm AMOOR_D : AMO_rr_aq_rl<0b01000, 0b011, "amoor.d">;
defm AMOMIN_D : AMO_rr_aq_rl<0b10000, 0b011, "amomin.d">;
defm AMOMAX_D : AMO_rr_aq_rl<0b10100, 0b011, "amomax.d">;
defm AMOMINU_D : AMO_rr_aq_rl<0b11000, 0b011, "amominu.d">;
defm AMOMAXU_D : AMO_rr_aq_rl<0b11100, 0b011, "amomaxu.d">;
} // Predicates = [HasStedExtA, IsRV64]
//===----------------------------------------------------------------------===//
// Pseudo-instructions and codegen patterns
//===----------------------------------------------------------------------===//
let Predicates = [HasStdExtA] in {
/// Atomic loads and stores
// Fences will be inserted for atomic load/stores according to the logic in
// RISCVTargetLowering::{emitLeadingFence,emitTrailingFence}.
defm : LdPat<atomic_load_8, LB>;
defm : LdPat<atomic_load_16, LH>;
defm : LdPat<atomic_load_32, LW>;
defm : AtomicStPat<atomic_store_8, SB, GPR>;
defm : AtomicStPat<atomic_store_16, SH, GPR>;
defm : AtomicStPat<atomic_store_32, SW, GPR>;
/// AMOs
multiclass AMOPat<string AtomicOp, string BaseInst> {
def : PatGprGpr<!cast<PatFrag>(AtomicOp#"_monotonic"),
!cast<RVInst>(BaseInst)>;
def : PatGprGpr<!cast<PatFrag>(AtomicOp#"_acquire"),
!cast<RVInst>(BaseInst#"_AQ")>;
def : PatGprGpr<!cast<PatFrag>(AtomicOp#"_release"),
!cast<RVInst>(BaseInst#"_RL")>;
def : PatGprGpr<!cast<PatFrag>(AtomicOp#"_acq_rel"),
!cast<RVInst>(BaseInst#"_AQ_RL")>;
def : PatGprGpr<!cast<PatFrag>(AtomicOp#"_seq_cst"),
!cast<RVInst>(BaseInst#"_AQ_RL")>;
}
defm : AMOPat<"atomic_swap_32", "AMOSWAP_W">;
defm : AMOPat<"atomic_load_add_32", "AMOADD_W">;
defm : AMOPat<"atomic_load_and_32", "AMOAND_W">;
defm : AMOPat<"atomic_load_or_32", "AMOOR_W">;
defm : AMOPat<"atomic_load_xor_32", "AMOXOR_W">;
defm : AMOPat<"atomic_load_max_32", "AMOMAX_W">;
defm : AMOPat<"atomic_load_min_32", "AMOMIN_W">;
defm : AMOPat<"atomic_load_umax_32", "AMOMAXU_W">;
defm : AMOPat<"atomic_load_umin_32", "AMOMINU_W">;
def : Pat<(atomic_load_sub_32_monotonic GPR:$addr, GPR:$incr),
(AMOADD_W GPR:$addr, (SUB X0, GPR:$incr))>;
def : Pat<(atomic_load_sub_32_acquire GPR:$addr, GPR:$incr),
(AMOADD_W_AQ GPR:$addr, (SUB X0, GPR:$incr))>;
def : Pat<(atomic_load_sub_32_release GPR:$addr, GPR:$incr),
(AMOADD_W_RL GPR:$addr, (SUB X0, GPR:$incr))>;
def : Pat<(atomic_load_sub_32_acq_rel GPR:$addr, GPR:$incr),
(AMOADD_W_AQ_RL GPR:$addr, (SUB X0, GPR:$incr))>;
def : Pat<(atomic_load_sub_32_seq_cst GPR:$addr, GPR:$incr),
(AMOADD_W_AQ_RL GPR:$addr, (SUB X0, GPR:$incr))>;
/// Pseudo AMOs
class PseudoAMO : Pseudo<(outs GPR:$res, GPR:$scratch),
(ins GPR:$addr, GPR:$incr, ixlenimm:$ordering), []> {
let Constraints = "@earlyclobber $res,@earlyclobber $scratch";
let mayLoad = 1;
let mayStore = 1;
let hasSideEffects = 0;
}
def PseudoAtomicLoadNand32 : PseudoAMO;
// Ordering constants must be kept in sync with the AtomicOrdering enum in
// AtomicOrdering.h.
def : Pat<(atomic_load_nand_32_monotonic GPR:$addr, GPR:$incr),
(PseudoAtomicLoadNand32 GPR:$addr, GPR:$incr, 2)>;
def : Pat<(atomic_load_nand_32_acquire GPR:$addr, GPR:$incr),
(PseudoAtomicLoadNand32 GPR:$addr, GPR:$incr, 4)>;
def : Pat<(atomic_load_nand_32_release GPR:$addr, GPR:$incr),
(PseudoAtomicLoadNand32 GPR:$addr, GPR:$incr, 5)>;
def : Pat<(atomic_load_nand_32_acq_rel GPR:$addr, GPR:$incr),
(PseudoAtomicLoadNand32 GPR:$addr, GPR:$incr, 6)>;
def : Pat<(atomic_load_nand_32_seq_cst GPR:$addr, GPR:$incr),
(PseudoAtomicLoadNand32 GPR:$addr, GPR:$incr, 7)>;
class PseudoMaskedAMO
: Pseudo<(outs GPR:$res, GPR:$scratch),
(ins GPR:$addr, GPR:$incr, GPR:$mask, ixlenimm:$ordering), []> {
let Constraints = "@earlyclobber $res,@earlyclobber $scratch";
let mayLoad = 1;
let mayStore = 1;
let hasSideEffects = 0;
}
class PseudoMaskedAMOMinMax
: Pseudo<(outs GPR:$res, GPR:$scratch1, GPR:$scratch2),
(ins GPR:$addr, GPR:$incr, GPR:$mask, ixlenimm:$sextshamt,
ixlenimm:$ordering), []> {
let Constraints = "@earlyclobber $res,@earlyclobber $scratch1,"
"@earlyclobber $scratch2";
let mayLoad = 1;
let mayStore = 1;
let hasSideEffects = 0;
}
class PseudoMaskedAMOUMinUMax
: Pseudo<(outs GPR:$res, GPR:$scratch1, GPR:$scratch2),
(ins GPR:$addr, GPR:$incr, GPR:$mask, ixlenimm:$ordering), []> {
let Constraints = "@earlyclobber $res,@earlyclobber $scratch1,"
"@earlyclobber $scratch2";
let mayLoad = 1;
let mayStore = 1;
let hasSideEffects = 0;
}
class PseudoMaskedAMOPat<Intrinsic intrin, Pseudo AMOInst>
: Pat<(intrin GPR:$addr, GPR:$incr, GPR:$mask, imm:$ordering),
(AMOInst GPR:$addr, GPR:$incr, GPR:$mask, imm:$ordering)>;
class PseudoMaskedAMOMinMaxPat<Intrinsic intrin, Pseudo AMOInst>
: Pat<(intrin GPR:$addr, GPR:$incr, GPR:$mask, GPR:$shiftamt,
imm:$ordering),
(AMOInst GPR:$addr, GPR:$incr, GPR:$mask, GPR:$shiftamt,
imm:$ordering)>;
def PseudoMaskedAtomicSwap32 : PseudoMaskedAMO;
def : PseudoMaskedAMOPat<int_riscv_masked_atomicrmw_xchg_i32,
PseudoMaskedAtomicSwap32>;
def PseudoMaskedAtomicLoadAdd32 : PseudoMaskedAMO;
def : PseudoMaskedAMOPat<int_riscv_masked_atomicrmw_add_i32,
PseudoMaskedAtomicLoadAdd32>;
def PseudoMaskedAtomicLoadSub32 : PseudoMaskedAMO;
def : PseudoMaskedAMOPat<int_riscv_masked_atomicrmw_sub_i32,
PseudoMaskedAtomicLoadSub32>;
def PseudoMaskedAtomicLoadNand32 : PseudoMaskedAMO;
def : PseudoMaskedAMOPat<int_riscv_masked_atomicrmw_nand_i32,
PseudoMaskedAtomicLoadNand32>;
def PseudoMaskedAtomicLoadMax32 : PseudoMaskedAMOMinMax;
def : PseudoMaskedAMOMinMaxPat<int_riscv_masked_atomicrmw_max_i32,
PseudoMaskedAtomicLoadMax32>;
def PseudoMaskedAtomicLoadMin32 : PseudoMaskedAMOMinMax;
def : PseudoMaskedAMOMinMaxPat<int_riscv_masked_atomicrmw_min_i32,
PseudoMaskedAtomicLoadMin32>;
def PseudoMaskedAtomicLoadUMax32 : PseudoMaskedAMOUMinUMax;
def : PseudoMaskedAMOPat<int_riscv_masked_atomicrmw_umax_i32,
PseudoMaskedAtomicLoadUMax32>;
def PseudoMaskedAtomicLoadUMin32 : PseudoMaskedAMOUMinUMax;
def : PseudoMaskedAMOPat<int_riscv_masked_atomicrmw_umin_i32,
PseudoMaskedAtomicLoadUMin32>;
/// Compare and exchange
class PseudoCmpXchg
: Pseudo<(outs GPR:$res, GPR:$scratch),
(ins GPR:$addr, GPR:$cmpval, GPR:$newval, i32imm:$ordering), []> {
let Constraints = "@earlyclobber $res,@earlyclobber $scratch";
let mayLoad = 1;
let mayStore = 1;
let hasSideEffects = 0;
}
// Ordering constants must be kept in sync with the AtomicOrdering enum in
// AtomicOrdering.h.
multiclass PseudoCmpXchgPat<string Op, Pseudo CmpXchgInst> {
def : Pat<(!cast<PatFrag>(Op#"_monotonic") GPR:$addr, GPR:$cmp, GPR:$new),
(CmpXchgInst GPR:$addr, GPR:$cmp, GPR:$new, 2)>;
def : Pat<(!cast<PatFrag>(Op#"_acquire") GPR:$addr, GPR:$cmp, GPR:$new),
(CmpXchgInst GPR:$addr, GPR:$cmp, GPR:$new, 4)>;
def : Pat<(!cast<PatFrag>(Op#"_release") GPR:$addr, GPR:$cmp, GPR:$new),
(CmpXchgInst GPR:$addr, GPR:$cmp, GPR:$new, 5)>;
def : Pat<(!cast<PatFrag>(Op#"_acq_rel") GPR:$addr, GPR:$cmp, GPR:$new),
(CmpXchgInst GPR:$addr, GPR:$cmp, GPR:$new, 6)>;
def : Pat<(!cast<PatFrag>(Op#"_seq_cst") GPR:$addr, GPR:$cmp, GPR:$new),
(CmpXchgInst GPR:$addr, GPR:$cmp, GPR:$new, 7)>;
}
def PseudoCmpXchg32 : PseudoCmpXchg;
defm : PseudoCmpXchgPat<"atomic_cmp_swap_32", PseudoCmpXchg32>;
def PseudoMaskedCmpXchg32
: Pseudo<(outs GPR:$res, GPR:$scratch),
(ins GPR:$addr, GPR:$cmpval, GPR:$newval, GPR:$mask,
i32imm:$ordering), []> {
let Constraints = "@earlyclobber $res,@earlyclobber $scratch";
let mayLoad = 1;
let mayStore = 1;
let hasSideEffects = 0;
}
def : Pat<(int_riscv_masked_cmpxchg_i32
GPR:$addr, GPR:$cmpval, GPR:$newval, GPR:$mask, imm:$ordering),
(PseudoMaskedCmpXchg32
GPR:$addr, GPR:$cmpval, GPR:$newval, GPR:$mask, imm:$ordering)>;
} // Predicates = [HasStdExtA]
|
