1 //===- RISCVInstrInfoC.td - Compressed RISCV instructions -*- tblgen-*-----===//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
9 include "RISCVInstrFormatsC.td"
11 //===----------------------------------------------------------------------===//
12 // Operand definitions.
13 //===----------------------------------------------------------------------===//
15 def UImmLog2XLenNonZeroAsmOperand : AsmOperandClass {
16 let Name = "UImmLog2XLenNonZero";
17 let RenderMethod = "addImmOperands";
18 let DiagnosticType = "InvalidUImmLog2XLenNonZero";
21 def uimmlog2xlennonzero : Operand<XLenVT>, ImmLeaf<XLenVT, [{
22 if (Subtarget->is64Bit())
23 return isUInt<6>(Imm) && (Imm != 0);
24 return isUInt<5>(Imm) && (Imm != 0);
26 let ParserMatchClass = UImmLog2XLenNonZeroAsmOperand;
27 // TODO: should ensure invalid shamt is rejected when decoding.
28 let DecoderMethod = "decodeUImmOperand<6>";
29 let MCOperandPredicate = [{
31 if (!MCOp.evaluateAsConstantImm(Imm))
33 if (STI.getTargetTriple().isArch64Bit())
34 return isUInt<6>(Imm) && (Imm != 0);
35 return isUInt<5>(Imm) && (Imm != 0);
39 def simm6 : Operand<XLenVT>, ImmLeaf<XLenVT, [{return isInt<6>(Imm);}]> {
40 let ParserMatchClass = SImmAsmOperand<6>;
41 let EncoderMethod = "getImmOpValue";
42 let DecoderMethod = "decodeSImmOperand<6>";
43 let MCOperandPredicate = [{
45 if (MCOp.evaluateAsConstantImm(Imm))
47 return MCOp.isBareSymbolRef();
51 def simm6nonzero : Operand<XLenVT>,
52 ImmLeaf<XLenVT, [{return (Imm != 0) && isInt<6>(Imm);}]> {
53 let ParserMatchClass = SImmAsmOperand<6, "NonZero">;
54 let EncoderMethod = "getImmOpValue";
55 let DecoderMethod = "decodeSImmOperand<6>";
56 let MCOperandPredicate = [{
58 if (MCOp.evaluateAsConstantImm(Imm))
59 return (Imm != 0) && isInt<6>(Imm);
60 return MCOp.isBareSymbolRef();
64 def immzero : Operand<XLenVT>,
65 ImmLeaf<XLenVT, [{return (Imm == 0);}]> {
66 let ParserMatchClass = ImmZeroAsmOperand;
69 def CLUIImmAsmOperand : AsmOperandClass {
71 let RenderMethod = "addImmOperands";
72 let DiagnosticType = !strconcat("Invalid", Name);
76 // c_lui_imm checks the immediate range is in [1, 31] or [0xfffe0, 0xfffff].
77 // The RISC-V ISA describes the constraint as [1, 63], with that value being
78 // loaded in to bits 17-12 of the destination register and sign extended from
79 // bit 17. Therefore, this 6-bit immediate can represent values in the ranges
80 // [1, 31] and [0xfffe0, 0xfffff].
81 def c_lui_imm : Operand<XLenVT>,
82 ImmLeaf<XLenVT, [{return (Imm != 0) &&
84 (Imm >= 0xfffe0 && Imm <= 0xfffff));}]> {
85 let ParserMatchClass = CLUIImmAsmOperand;
86 let EncoderMethod = "getImmOpValue";
87 let DecoderMethod = "decodeCLUIImmOperand";
88 let MCOperandPredicate = [{
90 if (MCOp.evaluateAsConstantImm(Imm))
91 return (Imm != 0) && (isUInt<5>(Imm) ||
92 (Imm >= 0xfffe0 && Imm <= 0xfffff));
93 return MCOp.isBareSymbolRef();
97 // A 7-bit unsigned immediate where the least significant two bits are zero.
98 def uimm7_lsb00 : Operand<XLenVT>,
99 ImmLeaf<XLenVT, [{return isShiftedUInt<5, 2>(Imm);}]> {
100 let ParserMatchClass = UImmAsmOperand<7, "Lsb00">;
101 let EncoderMethod = "getImmOpValue";
102 let DecoderMethod = "decodeUImmOperand<7>";
103 let MCOperandPredicate = [{
105 if (!MCOp.evaluateAsConstantImm(Imm))
107 return isShiftedUInt<5, 2>(Imm);
111 // A 8-bit unsigned immediate where the least significant two bits are zero.
112 def uimm8_lsb00 : Operand<XLenVT>,
113 ImmLeaf<XLenVT, [{return isShiftedUInt<6, 2>(Imm);}]> {
114 let ParserMatchClass = UImmAsmOperand<8, "Lsb00">;
115 let EncoderMethod = "getImmOpValue";
116 let DecoderMethod = "decodeUImmOperand<8>";
117 let MCOperandPredicate = [{
119 if (!MCOp.evaluateAsConstantImm(Imm))
121 return isShiftedUInt<6, 2>(Imm);
125 // A 8-bit unsigned immediate where the least significant three bits are zero.
126 def uimm8_lsb000 : Operand<XLenVT>,
127 ImmLeaf<XLenVT, [{return isShiftedUInt<5, 3>(Imm);}]> {
128 let ParserMatchClass = UImmAsmOperand<8, "Lsb000">;
129 let EncoderMethod = "getImmOpValue";
130 let DecoderMethod = "decodeUImmOperand<8>";
131 let MCOperandPredicate = [{
133 if (!MCOp.evaluateAsConstantImm(Imm))
135 return isShiftedUInt<5, 3>(Imm);
139 // A 9-bit signed immediate where the least significant bit is zero.
140 def simm9_lsb0 : Operand<OtherVT>,
141 ImmLeaf<XLenVT, [{return isShiftedInt<8, 1>(Imm);}]> {
142 let ParserMatchClass = SImmAsmOperand<9, "Lsb0">;
143 let EncoderMethod = "getImmOpValueAsr1";
144 let DecoderMethod = "decodeSImmOperandAndLsl1<9>";
145 let MCOperandPredicate = [{
147 if (MCOp.evaluateAsConstantImm(Imm))
148 return isShiftedInt<8, 1>(Imm);
149 return MCOp.isBareSymbolRef();
154 // A 9-bit unsigned immediate where the least significant three bits are zero.
155 def uimm9_lsb000 : Operand<XLenVT>,
156 ImmLeaf<XLenVT, [{return isShiftedUInt<6, 3>(Imm);}]> {
157 let ParserMatchClass = UImmAsmOperand<9, "Lsb000">;
158 let EncoderMethod = "getImmOpValue";
159 let DecoderMethod = "decodeUImmOperand<9>";
160 let MCOperandPredicate = [{
162 if (!MCOp.evaluateAsConstantImm(Imm))
164 return isShiftedUInt<6, 3>(Imm);
168 // A 10-bit unsigned immediate where the least significant two bits are zero
169 // and the immediate can't be zero.
170 def uimm10_lsb00nonzero : Operand<XLenVT>,
172 [{return isShiftedUInt<8, 2>(Imm) && (Imm != 0);}]> {
173 let ParserMatchClass = UImmAsmOperand<10, "Lsb00NonZero">;
174 let EncoderMethod = "getImmOpValue";
175 let DecoderMethod = "decodeUImmNonZeroOperand<10>";
176 let MCOperandPredicate = [{
178 if (!MCOp.evaluateAsConstantImm(Imm))
180 return isShiftedUInt<8, 2>(Imm) && (Imm != 0);
184 // A 10-bit signed immediate where the least significant four bits are zero.
185 def simm10_lsb0000nonzero : Operand<XLenVT>,
187 [{return (Imm != 0) && isShiftedInt<6, 4>(Imm);}]> {
188 let ParserMatchClass = SImmAsmOperand<10, "Lsb0000NonZero">;
189 let EncoderMethod = "getImmOpValue";
190 let DecoderMethod = "decodeSImmNonZeroOperand<10>";
191 let MCOperandPredicate = [{
193 if (!MCOp.evaluateAsConstantImm(Imm))
195 return isShiftedInt<6, 4>(Imm) && (Imm != 0);
199 // A 12-bit signed immediate where the least significant bit is zero.
200 def simm12_lsb0 : Operand<XLenVT>,
201 ImmLeaf<XLenVT, [{return isShiftedInt<11, 1>(Imm);}]> {
202 let ParserMatchClass = SImmAsmOperand<12, "Lsb0">;
203 let EncoderMethod = "getImmOpValueAsr1";
204 let DecoderMethod = "decodeSImmOperandAndLsl1<12>";
205 let MCOperandPredicate = [{
207 if (MCOp.evaluateAsConstantImm(Imm))
208 return isShiftedInt<11, 1>(Imm);
209 return MCOp.isBareSymbolRef();
213 //===----------------------------------------------------------------------===//
214 // Instruction Class Templates
215 //===----------------------------------------------------------------------===//
217 let hasSideEffects = 0, mayLoad = 1, mayStore = 0 in
218 class CStackLoad<bits<3> funct3, string OpcodeStr,
219 RegisterClass cls, DAGOperand opnd>
220 : RVInst16CI<funct3, 0b10, (outs cls:$rd), (ins SP:$rs1, opnd:$imm),
221 OpcodeStr, "$rd, ${imm}(${rs1})">;
223 let hasSideEffects = 0, mayLoad = 0, mayStore = 1 in
224 class CStackStore<bits<3> funct3, string OpcodeStr,
225 RegisterClass cls, DAGOperand opnd>
226 : RVInst16CSS<funct3, 0b10, (outs), (ins cls:$rs2, SP:$rs1, opnd:$imm),
227 OpcodeStr, "$rs2, ${imm}(${rs1})">;
229 let hasSideEffects = 0, mayLoad = 1, mayStore = 0 in
230 class CLoad_ri<bits<3> funct3, string OpcodeStr,
231 RegisterClass cls, DAGOperand opnd>
232 : RVInst16CL<funct3, 0b00, (outs cls:$rd), (ins GPRC:$rs1, opnd:$imm),
233 OpcodeStr, "$rd, ${imm}(${rs1})">;
235 let hasSideEffects = 0, mayLoad = 0, mayStore = 1 in
236 class CStore_rri<bits<3> funct3, string OpcodeStr,
237 RegisterClass cls, DAGOperand opnd>
238 : RVInst16CS<funct3, 0b00, (outs), (ins cls:$rs2, GPRC:$rs1, opnd:$imm),
239 OpcodeStr, "$rs2, ${imm}(${rs1})">;
241 let hasSideEffects = 0, mayLoad = 0, mayStore = 0 in
242 class Bcz<bits<3> funct3, string OpcodeStr, PatFrag CondOp,
244 : RVInst16CB<funct3, 0b01, (outs), (ins cls:$rs1, simm9_lsb0:$imm),
245 OpcodeStr, "$rs1, $imm"> {
247 let isTerminator = 1;
248 let Inst{12} = imm{7};
249 let Inst{11-10} = imm{3-2};
250 let Inst{6-5} = imm{6-5};
251 let Inst{4-3} = imm{1-0};
252 let Inst{2} = imm{4};
255 let hasSideEffects = 0, mayLoad = 0, mayStore = 0 in
256 class Shift_right<bits<2> funct2, string OpcodeStr, RegisterClass cls,
258 : RVInst16CB<0b100, 0b01, (outs cls:$rs1_wb), (ins cls:$rs1, ImmOpnd:$imm),
259 OpcodeStr, "$rs1, $imm"> {
260 let Constraints = "$rs1 = $rs1_wb";
261 let Inst{12} = imm{5};
262 let Inst{11-10} = funct2;
263 let Inst{6-2} = imm{4-0};
266 let hasSideEffects = 0, mayLoad = 0, mayStore = 0 in
267 class CS_ALU<bits<6> funct6, bits<2> funct2, string OpcodeStr,
269 : RVInst16CA<funct6, funct2, 0b01, (outs cls:$rd_wb), (ins cls:$rd, cls:$rs2),
270 OpcodeStr, "$rd, $rs2"> {
272 let Constraints = "$rd = $rd_wb";
276 //===----------------------------------------------------------------------===//
278 //===----------------------------------------------------------------------===//
280 let Predicates = [HasStdExtC] in {
282 let hasSideEffects = 0, mayLoad = 0, mayStore = 0, Uses = [X2] in
283 def C_ADDI4SPN : RVInst16CIW<0b000, 0b00, (outs GPRC:$rd),
284 (ins SP:$rs1, uimm10_lsb00nonzero:$imm),
285 "c.addi4spn", "$rd, $rs1, $imm">,
286 Sched<[WriteIALU, ReadIALU]> {
288 let Inst{12-11} = imm{5-4};
289 let Inst{10-7} = imm{9-6};
290 let Inst{6} = imm{2};
291 let Inst{5} = imm{3};
294 let Predicates = [HasStdExtC, HasStdExtD] in
295 def C_FLD : CLoad_ri<0b001, "c.fld", FPR64C, uimm8_lsb000>,
296 Sched<[WriteFLD64, ReadMemBase]> {
298 let Inst{12-10} = imm{5-3};
299 let Inst{6-5} = imm{7-6};
302 def C_LW : CLoad_ri<0b010, "c.lw", GPRC, uimm7_lsb00>,
303 Sched<[WriteLDW, ReadMemBase]> {
305 let Inst{12-10} = imm{5-3};
306 let Inst{6} = imm{2};
307 let Inst{5} = imm{6};
310 let DecoderNamespace = "RISCV32Only_",
311 Predicates = [HasStdExtC, HasStdExtF, IsRV32] in
312 def C_FLW : CLoad_ri<0b011, "c.flw", FPR32C, uimm7_lsb00>,
313 Sched<[WriteFLD32, ReadMemBase]> {
315 let Inst{12-10} = imm{5-3};
316 let Inst{6} = imm{2};
317 let Inst{5} = imm{6};
320 let Predicates = [HasStdExtC, IsRV64] in
321 def C_LD : CLoad_ri<0b011, "c.ld", GPRC, uimm8_lsb000>,
322 Sched<[WriteLDD, ReadMemBase]> {
324 let Inst{12-10} = imm{5-3};
325 let Inst{6-5} = imm{7-6};
328 let Predicates = [HasStdExtC, HasStdExtD] in
329 def C_FSD : CStore_rri<0b101, "c.fsd", FPR64C, uimm8_lsb000>,
330 Sched<[WriteFST64, ReadStoreData, ReadMemBase]> {
332 let Inst{12-10} = imm{5-3};
333 let Inst{6-5} = imm{7-6};
336 def C_SW : CStore_rri<0b110, "c.sw", GPRC, uimm7_lsb00>,
337 Sched<[WriteSTW, ReadStoreData, ReadMemBase]> {
339 let Inst{12-10} = imm{5-3};
340 let Inst{6} = imm{2};
341 let Inst{5} = imm{6};
344 let DecoderNamespace = "RISCV32Only_",
345 Predicates = [HasStdExtC, HasStdExtF, IsRV32] in
346 def C_FSW : CStore_rri<0b111, "c.fsw", FPR32C, uimm7_lsb00>,
347 Sched<[WriteFST32, ReadStoreData, ReadMemBase]> {
349 let Inst{12-10} = imm{5-3};
350 let Inst{6} = imm{2};
351 let Inst{5} = imm{6};
354 let Predicates = [HasStdExtC, IsRV64] in
355 def C_SD : CStore_rri<0b111, "c.sd", GPRC, uimm8_lsb000>,
356 Sched<[WriteSTD, ReadStoreData, ReadMemBase]> {
358 let Inst{12-10} = imm{5-3};
359 let Inst{6-5} = imm{7-6};
362 let rd = 0, imm = 0, hasSideEffects = 0, mayLoad = 0, mayStore = 0 in
363 def C_NOP : RVInst16CI<0b000, 0b01, (outs), (ins), "c.nop", "">,
369 let hasSideEffects = 0, mayLoad = 0, mayStore = 0 in
370 def C_ADDI : RVInst16CI<0b000, 0b01, (outs GPRNoX0:$rd_wb),
371 (ins GPRNoX0:$rd, simm6nonzero:$imm),
372 "c.addi", "$rd, $imm">,
373 Sched<[WriteIALU, ReadIALU]> {
374 let Constraints = "$rd = $rd_wb";
375 let Inst{6-2} = imm{4-0};
378 let hasSideEffects = 0, mayLoad = 0, mayStore = 0 in
379 def C_ADDI_NOP : RVInst16CI<0b000, 0b01, (outs GPRX0:$rd_wb),
380 (ins GPRX0:$rd, immzero:$imm),
381 "c.addi", "$rd, $imm">,
382 Sched<[WriteIALU, ReadIALU]> {
383 let Constraints = "$rd = $rd_wb";
385 let isAsmParserOnly = 1;
388 let hasSideEffects = 0, mayLoad = 0, mayStore = 0, isCall = 1,
389 DecoderNamespace = "RISCV32Only_", Defs = [X1],
390 Predicates = [HasStdExtC, IsRV32] in
391 def C_JAL : RVInst16CJ<0b001, 0b01, (outs), (ins simm12_lsb0:$offset),
392 "c.jal", "$offset">, Sched<[WriteJal]>;
394 let hasSideEffects = 0, mayLoad = 0, mayStore = 0,
395 Predicates = [HasStdExtC, IsRV64] in
396 def C_ADDIW : RVInst16CI<0b001, 0b01, (outs GPRNoX0:$rd_wb),
397 (ins GPRNoX0:$rd, simm6:$imm),
398 "c.addiw", "$rd, $imm">,
399 Sched<[WriteIALU32, ReadIALU32]> {
400 let Constraints = "$rd = $rd_wb";
401 let Inst{6-2} = imm{4-0};
404 let hasSideEffects = 0, mayLoad = 0, mayStore = 0 in
405 def C_LI : RVInst16CI<0b010, 0b01, (outs GPRNoX0:$rd), (ins simm6:$imm),
406 "c.li", "$rd, $imm">,
408 let Inst{6-2} = imm{4-0};
411 let hasSideEffects = 0, mayLoad = 0, mayStore = 0 in
412 def C_ADDI16SP : RVInst16CI<0b011, 0b01, (outs SP:$rd_wb),
413 (ins SP:$rd, simm10_lsb0000nonzero:$imm),
414 "c.addi16sp", "$rd, $imm">,
415 Sched<[WriteIALU, ReadIALU]> {
416 let Constraints = "$rd = $rd_wb";
417 let Inst{12} = imm{9};
419 let Inst{6} = imm{4};
420 let Inst{5} = imm{6};
421 let Inst{4-3} = imm{8-7};
422 let Inst{2} = imm{5};
425 let hasSideEffects = 0, mayLoad = 0, mayStore = 0 in
426 def C_LUI : RVInst16CI<0b011, 0b01, (outs GPRNoX0X2:$rd),
427 (ins c_lui_imm:$imm),
428 "c.lui", "$rd, $imm">,
430 let Inst{6-2} = imm{4-0};
433 def C_SRLI : Shift_right<0b00, "c.srli", GPRC, uimmlog2xlennonzero>,
434 Sched<[WriteShift, ReadShift]>;
435 def C_SRAI : Shift_right<0b01, "c.srai", GPRC, uimmlog2xlennonzero>,
436 Sched<[WriteShift, ReadShift]>;
438 let hasSideEffects = 0, mayLoad = 0, mayStore = 0 in
439 def C_ANDI : RVInst16CB<0b100, 0b01, (outs GPRC:$rs1_wb), (ins GPRC:$rs1, simm6:$imm),
440 "c.andi", "$rs1, $imm">,
441 Sched<[WriteIALU, ReadIALU]> {
442 let Constraints = "$rs1 = $rs1_wb";
443 let Inst{12} = imm{5};
444 let Inst{11-10} = 0b10;
445 let Inst{6-2} = imm{4-0};
448 def C_SUB : CS_ALU<0b100011, 0b00, "c.sub", GPRC>,
449 Sched<[WriteIALU, ReadIALU, ReadIALU]>;
450 def C_XOR : CS_ALU<0b100011, 0b01, "c.xor", GPRC>,
451 Sched<[WriteIALU, ReadIALU, ReadIALU]>;
452 def C_OR : CS_ALU<0b100011, 0b10, "c.or" , GPRC>,
453 Sched<[WriteIALU, ReadIALU, ReadIALU]>;
454 def C_AND : CS_ALU<0b100011, 0b11, "c.and", GPRC>,
455 Sched<[WriteIALU, ReadIALU, ReadIALU]>;
457 let Predicates = [HasStdExtC, IsRV64] in {
458 def C_SUBW : CS_ALU<0b100111, 0b00, "c.subw", GPRC>,
459 Sched<[WriteIALU32, ReadIALU32, ReadIALU32]>;
460 def C_ADDW : CS_ALU<0b100111, 0b01, "c.addw", GPRC>,
461 Sched<[WriteIALU32, ReadIALU32, ReadIALU32]>;
464 let hasSideEffects = 0, mayLoad = 0, mayStore = 0 in
465 def C_J : RVInst16CJ<0b101, 0b01, (outs), (ins simm12_lsb0:$offset),
466 "c.j", "$offset">, Sched<[WriteJmp]> {
472 def C_BEQZ : Bcz<0b110, "c.beqz", seteq, GPRC>, Sched<[WriteJmp]>;
473 def C_BNEZ : Bcz<0b111, "c.bnez", setne, GPRC>, Sched<[WriteJmp]>;
475 let hasSideEffects = 0, mayLoad = 0, mayStore = 0 in
476 def C_SLLI : RVInst16CI<0b000, 0b10, (outs GPRNoX0:$rd_wb),
477 (ins GPRNoX0:$rd, uimmlog2xlennonzero:$imm),
478 "c.slli" ,"$rd, $imm">,
479 Sched<[WriteShift, ReadShift]> {
480 let Constraints = "$rd = $rd_wb";
481 let Inst{6-2} = imm{4-0};
484 let Predicates = [HasStdExtC, HasStdExtD] in
485 def C_FLDSP : CStackLoad<0b001, "c.fldsp", FPR64, uimm9_lsb000>,
486 Sched<[WriteFLD64, ReadMemBase]> {
487 let Inst{6-5} = imm{4-3};
488 let Inst{4-2} = imm{8-6};
491 def C_LWSP : CStackLoad<0b010, "c.lwsp", GPRNoX0, uimm8_lsb00>,
492 Sched<[WriteLDW, ReadMemBase]> {
493 let Inst{6-4} = imm{4-2};
494 let Inst{3-2} = imm{7-6};
497 let DecoderNamespace = "RISCV32Only_",
498 Predicates = [HasStdExtC, HasStdExtF, IsRV32] in
499 def C_FLWSP : CStackLoad<0b011, "c.flwsp", FPR32, uimm8_lsb00>,
500 Sched<[WriteFLD32, ReadMemBase]> {
501 let Inst{6-4} = imm{4-2};
502 let Inst{3-2} = imm{7-6};
505 let Predicates = [HasStdExtC, IsRV64] in
506 def C_LDSP : CStackLoad<0b011, "c.ldsp", GPRNoX0, uimm9_lsb000>,
507 Sched<[WriteLDD, ReadMemBase]> {
508 let Inst{6-5} = imm{4-3};
509 let Inst{4-2} = imm{8-6};
512 let hasSideEffects = 0, mayLoad = 0, mayStore = 0 in
513 def C_JR : RVInst16CR<0b1000, 0b10, (outs), (ins GPRNoX0:$rs1),
514 "c.jr", "$rs1">, Sched<[WriteJmpReg]> {
517 let isTerminator = 1;
518 let isIndirectBranch = 1;
522 let hasSideEffects = 0, mayLoad = 0, mayStore = 0 in
523 def C_MV : RVInst16CR<0b1000, 0b10, (outs GPRNoX0:$rs1), (ins GPRNoX0:$rs2),
524 "c.mv", "$rs1, $rs2">,
525 Sched<[WriteIALU, ReadIALU]>;
527 let rs1 = 0, rs2 = 0, hasSideEffects = 1, mayLoad = 0, mayStore = 0 in
528 def C_EBREAK : RVInst16CR<0b1001, 0b10, (outs), (ins), "c.ebreak", "">, Sched<[]>;
530 let hasSideEffects = 0, mayLoad = 0, mayStore = 0,
531 isCall=1, Defs=[X1], rs2 = 0 in
532 def C_JALR : RVInst16CR<0b1001, 0b10, (outs), (ins GPRNoX0:$rs1),
533 "c.jalr", "$rs1">, Sched<[WriteJalr, ReadJalr]>;
535 let hasSideEffects = 0, mayLoad = 0, mayStore = 0 in
536 def C_ADD : RVInst16CR<0b1001, 0b10, (outs GPRNoX0:$rs1_wb),
537 (ins GPRNoX0:$rs1, GPRNoX0:$rs2),
538 "c.add", "$rs1, $rs2">,
539 Sched<[WriteIALU, ReadIALU, ReadIALU]> {
540 let Constraints = "$rs1 = $rs1_wb";
543 let Predicates = [HasStdExtC, HasStdExtD] in
544 def C_FSDSP : CStackStore<0b101, "c.fsdsp", FPR64, uimm9_lsb000>,
545 Sched<[WriteFST64, ReadStoreData, ReadMemBase]> {
546 let Inst{12-10} = imm{5-3};
547 let Inst{9-7} = imm{8-6};
550 def C_SWSP : CStackStore<0b110, "c.swsp", GPR, uimm8_lsb00>,
551 Sched<[WriteSTW, ReadStoreData, ReadMemBase]> {
552 let Inst{12-9} = imm{5-2};
553 let Inst{8-7} = imm{7-6};
556 let DecoderNamespace = "RISCV32Only_",
557 Predicates = [HasStdExtC, HasStdExtF, IsRV32] in
558 def C_FSWSP : CStackStore<0b111, "c.fswsp", FPR32, uimm8_lsb00>,
559 Sched<[WriteFST32, ReadStoreData, ReadMemBase]> {
560 let Inst{12-9} = imm{5-2};
561 let Inst{8-7} = imm{7-6};
564 let Predicates = [HasStdExtC, IsRV64] in
565 def C_SDSP : CStackStore<0b111, "c.sdsp", GPR, uimm9_lsb000>,
566 Sched<[WriteSTD, ReadStoreData, ReadMemBase]> {
567 let Inst{12-10} = imm{5-3};
568 let Inst{9-7} = imm{8-6};
571 // The all zeros pattern isn't a valid RISC-V instruction. It's used by GNU
572 // binutils as 16-bit instruction known to be unimplemented (i.e., trapping).
573 let hasSideEffects = 1, mayLoad = 0, mayStore = 0 in
574 def C_UNIMP : RVInst16<(outs), (ins), "c.unimp", "", [], InstFormatOther>,
579 } // Predicates = [HasStdExtC]
581 //===----------------------------------------------------------------------===//
583 //===----------------------------------------------------------------------===//
585 let Predicates = [HasStdExtC, HasRVCHints], hasSideEffects = 0, mayLoad = 0,
590 def C_NOP_HINT : RVInst16CI<0b000, 0b01, (outs), (ins simm6nonzero:$imm),
591 "c.nop", "$imm">, Sched<[WriteNop]> {
592 let Inst{6-2} = imm{4-0};
593 let DecoderMethod = "decodeRVCInstrSImm";
596 // Just a different syntax for the c.nop hint: c.addi x0, simm6 vs c.nop simm6.
597 def C_ADDI_HINT_X0 : RVInst16CI<0b000, 0b01, (outs GPRX0:$rd_wb),
598 (ins GPRX0:$rd, simm6nonzero:$imm),
599 "c.addi", "$rd, $imm">,
600 Sched<[WriteIALU, ReadIALU]> {
601 let Constraints = "$rd = $rd_wb";
602 let Inst{6-2} = imm{4-0};
603 let isAsmParserOnly = 1;
606 def C_ADDI_HINT_IMM_ZERO : RVInst16CI<0b000, 0b01, (outs GPRNoX0:$rd_wb),
607 (ins GPRNoX0:$rd, immzero:$imm),
608 "c.addi", "$rd, $imm">,
609 Sched<[WriteIALU, ReadIALU]> {
610 let Constraints = "$rd = $rd_wb";
612 let isAsmParserOnly = 1;
615 def C_LI_HINT : RVInst16CI<0b010, 0b01, (outs GPRX0:$rd), (ins simm6:$imm),
616 "c.li", "$rd, $imm">,
618 let Inst{6-2} = imm{4-0};
620 let DecoderMethod = "decodeRVCInstrRdSImm";
623 def C_LUI_HINT : RVInst16CI<0b011, 0b01, (outs GPRX0:$rd),
624 (ins c_lui_imm:$imm),
625 "c.lui", "$rd, $imm">,
627 let Inst{6-2} = imm{4-0};
629 let DecoderMethod = "decodeRVCInstrRdSImm";
632 def C_MV_HINT : RVInst16CR<0b1000, 0b10, (outs GPRX0:$rs1), (ins GPRNoX0:$rs2),
633 "c.mv", "$rs1, $rs2">, Sched<[WriteIALU, ReadIALU]>
636 let DecoderMethod = "decodeRVCInstrRdRs2";
639 def C_ADD_HINT : RVInst16CR<0b1001, 0b10, (outs GPRX0:$rs1_wb),
640 (ins GPRX0:$rs1, GPRNoX0:$rs2),
641 "c.add", "$rs1, $rs2">,
642 Sched<[WriteIALU, ReadIALU, ReadIALU]> {
643 let Constraints = "$rs1 = $rs1_wb";
645 let DecoderMethod = "decodeRVCInstrRdRs1Rs2";
648 def C_SLLI_HINT : RVInst16CI<0b000, 0b10, (outs GPRX0:$rd_wb),
649 (ins GPRX0:$rd, uimmlog2xlennonzero:$imm),
650 "c.slli" ,"$rd, $imm">,
651 Sched<[WriteShift, ReadShift]> {
652 let Constraints = "$rd = $rd_wb";
653 let Inst{6-2} = imm{4-0};
655 let DecoderMethod = "decodeRVCInstrRdRs1UImm";
658 def C_SLLI64_HINT : RVInst16CI<0b000, 0b10, (outs GPR:$rd_wb), (ins GPR:$rd),
660 Sched<[WriteShift, ReadShift]> {
661 let Constraints = "$rd = $rd_wb";
666 def C_SRLI64_HINT : RVInst16CI<0b100, 0b01, (outs GPRC:$rd_wb),
669 Sched<[WriteShift, ReadShift]> {
670 let Constraints = "$rd = $rd_wb";
676 def C_SRAI64_HINT : RVInst16CI<0b100, 0b01, (outs GPRC:$rd_wb),
679 Sched<[WriteShift, ReadShift]> {
680 let Constraints = "$rd = $rd_wb";
686 } // Predicates = [HasStdExtC, HasRVCHints], hasSideEffects = 0, mayLoad = 0,
689 //===----------------------------------------------------------------------===//
690 // Assembler Pseudo Instructions
691 //===----------------------------------------------------------------------===//
693 let EmitPriority = 0 in {
694 let Predicates = [HasStdExtC, HasStdExtD] in
695 def : InstAlias<"c.fld $rd, (${rs1})", (C_FLD FPR64C:$rd, GPRC:$rs1, 0)>;
697 def : InstAlias<"c.lw $rd, (${rs1})", (C_LW GPRC:$rd, GPRC:$rs1, 0)>;
699 let Predicates = [HasStdExtC, HasStdExtF, IsRV32] in
700 def : InstAlias<"c.flw $rd, (${rs1})", (C_FLW FPR32C:$rd, GPRC:$rs1, 0)>;
702 let Predicates = [HasStdExtC, IsRV64] in
703 def : InstAlias<"c.ld $rd, (${rs1})", (C_LD GPRC:$rd, GPRC:$rs1, 0)>;
705 let Predicates = [HasStdExtC, HasStdExtD] in
706 def : InstAlias<"c.fsd $rs2, (${rs1})", (C_FSD FPR64C:$rs2, GPRC:$rs1, 0)>;
708 def : InstAlias<"c.sw $rs2, (${rs1})", (C_SW GPRC:$rs2, GPRC:$rs1, 0)>;
710 let Predicates = [HasStdExtC, HasStdExtF, IsRV32] in
711 def : InstAlias<"c.fsw $rs2, (${rs1})", (C_FSW FPR32C:$rs2, GPRC:$rs1, 0)>;
713 let Predicates = [HasStdExtC, IsRV64] in
714 def : InstAlias<"c.sd $rs2, (${rs1})", (C_SD GPRC:$rs2, GPRC:$rs1, 0)>;
716 let Predicates = [HasStdExtC, HasStdExtD] in
717 def : InstAlias<"c.fldsp $rd, (${rs1})", (C_FLDSP FPR64C:$rd, SP:$rs1, 0)>;
719 def : InstAlias<"c.lwsp $rd, (${rs1})", (C_LWSP GPRC:$rd, SP:$rs1, 0)>;
721 let Predicates = [HasStdExtC, HasStdExtF, IsRV32] in
722 def : InstAlias<"c.flwsp $rd, (${rs1})", (C_FLWSP FPR32C:$rd, SP:$rs1, 0)>;
724 let Predicates = [HasStdExtC, IsRV64] in
725 def : InstAlias<"c.ldsp $rd, (${rs1})", (C_LDSP GPRC:$rd, SP:$rs1, 0)>;
727 let Predicates = [HasStdExtC, HasStdExtD] in
728 def : InstAlias<"c.fsdsp $rs2, (${rs1})", (C_FSDSP FPR64C:$rs2, SP:$rs1, 0)>;
730 def : InstAlias<"c.swsp $rs2, (${rs1})", (C_SWSP GPRC:$rs2, SP:$rs1, 0)>;
732 let Predicates = [HasStdExtC, HasStdExtF, IsRV32] in
733 def : InstAlias<"c.fswsp $rs2, (${rs1})", (C_FSWSP FPR32C:$rs2, SP:$rs1, 0)>;
735 let Predicates = [HasStdExtC, IsRV64] in
736 def : InstAlias<"c.sdsp $rs2, (${rs1})", (C_SDSP GPRC:$rs2, SP:$rs1, 0)>;
739 //===----------------------------------------------------------------------===//
740 // Compress Instruction tablegen backend.
741 //===----------------------------------------------------------------------===//
743 class CompressPat<dag input, dag output> {
746 list<Predicate> Predicates = [];
749 // Patterns are defined in the same order the compressed instructions appear
750 // on page 82 of the ISA manual.
753 let Predicates = [HasStdExtC] in {
754 def : CompressPat<(ADDI GPRC:$rd, SP:$rs1, uimm10_lsb00nonzero:$imm),
755 (C_ADDI4SPN GPRC:$rd, SP:$rs1, uimm10_lsb00nonzero:$imm)>;
756 } // Predicates = [HasStdExtC]
758 let Predicates = [HasStdExtC, HasStdExtD] in {
759 def : CompressPat<(FLD FPR64C:$rd, GPRC:$rs1, uimm8_lsb000:$imm),
760 (C_FLD FPR64C:$rd, GPRC:$rs1, uimm8_lsb000:$imm)>;
761 } // Predicates = [HasStdExtC, HasStdExtD]
763 let Predicates = [HasStdExtC] in {
764 def : CompressPat<(LW GPRC:$rd, GPRC:$rs1, uimm7_lsb00:$imm),
765 (C_LW GPRC:$rd, GPRC:$rs1, uimm7_lsb00:$imm)>;
766 } // Predicates = [HasStdExtC]
768 let Predicates = [HasStdExtC, HasStdExtF, IsRV32] in {
769 def : CompressPat<(FLW FPR32C:$rd, GPRC:$rs1, uimm7_lsb00:$imm),
770 (C_FLW FPR32C:$rd, GPRC:$rs1, uimm7_lsb00:$imm)>;
771 } // Predicates = [HasStdExtC, HasStdExtF, IsRV32]
773 let Predicates = [HasStdExtC, IsRV64] in {
774 def : CompressPat<(LD GPRC:$rd, GPRC:$rs1, uimm8_lsb000:$imm),
775 (C_LD GPRC:$rd, GPRC:$rs1, uimm8_lsb000:$imm)>;
776 } // Predicates = [HasStdExtC, IsRV64]
778 let Predicates = [HasStdExtC, HasStdExtD] in {
779 def : CompressPat<(FSD FPR64C:$rs2, GPRC:$rs1, uimm8_lsb000:$imm),
780 (C_FSD FPR64C:$rs2, GPRC:$rs1, uimm8_lsb000:$imm)>;
781 } // Predicates = [HasStdExtC, HasStdExtD]
783 let Predicates = [HasStdExtC] in {
784 def : CompressPat<(SW GPRC:$rs2, GPRC:$rs1, uimm7_lsb00:$imm),
785 (C_SW GPRC:$rs2, GPRC:$rs1, uimm7_lsb00:$imm)>;
786 } // Predicates = [HasStdExtC]
788 let Predicates = [HasStdExtC, HasStdExtF, IsRV32] in {
789 def : CompressPat<(FSW FPR32C:$rs2, GPRC:$rs1,uimm7_lsb00:$imm),
790 (C_FSW FPR32C:$rs2, GPRC:$rs1, uimm7_lsb00:$imm)>;
791 } // Predicate = [HasStdExtC, HasStdExtF, IsRV32]
793 let Predicates = [HasStdExtC, IsRV64] in {
794 def : CompressPat<(SD GPRC:$rs2, GPRC:$rs1, uimm8_lsb000:$imm),
795 (C_SD GPRC:$rs2, GPRC:$rs1, uimm8_lsb000:$imm)>;
796 } // Predicates = [HasStdExtC, IsRV64]
799 let Predicates = [HasStdExtC] in {
800 def : CompressPat<(ADDI X0, X0, 0), (C_NOP)>;
801 def : CompressPat<(ADDI GPRNoX0:$rs1, GPRNoX0:$rs1, simm6nonzero:$imm),
802 (C_ADDI GPRNoX0:$rs1, simm6nonzero:$imm)>;
803 } // Predicates = [HasStdExtC]
805 let Predicates = [HasStdExtC, IsRV32] in {
806 def : CompressPat<(JAL X1, simm12_lsb0:$offset),
807 (C_JAL simm12_lsb0:$offset)>;
808 } // Predicates = [HasStdExtC, IsRV32]
810 let Predicates = [HasStdExtC, IsRV64] in {
811 def : CompressPat<(ADDIW GPRNoX0:$rs1, GPRNoX0:$rs1, simm6:$imm),
812 (C_ADDIW GPRNoX0:$rs1, simm6:$imm)>;
813 } // Predicates = [HasStdExtC, IsRV64]
815 let Predicates = [HasStdExtC] in {
816 def : CompressPat<(ADDI GPRNoX0:$rd, X0, simm6:$imm),
817 (C_LI GPRNoX0:$rd, simm6:$imm)>;
818 def : CompressPat<(ADDI X2, X2, simm10_lsb0000nonzero:$imm),
819 (C_ADDI16SP X2, simm10_lsb0000nonzero:$imm)>;
820 def : CompressPat<(LUI GPRNoX0X2:$rd, c_lui_imm:$imm),
821 (C_LUI GPRNoX0X2:$rd, c_lui_imm:$imm)>;
822 def : CompressPat<(SRLI GPRC:$rs1, GPRC:$rs1, uimmlog2xlennonzero:$imm),
823 (C_SRLI GPRC:$rs1, uimmlog2xlennonzero:$imm)>;
824 def : CompressPat<(SRAI GPRC:$rs1, GPRC:$rs1, uimmlog2xlennonzero:$imm),
825 (C_SRAI GPRC:$rs1, uimmlog2xlennonzero:$imm)>;
826 def : CompressPat<(ANDI GPRC:$rs1, GPRC:$rs1, simm6:$imm),
827 (C_ANDI GPRC:$rs1, simm6:$imm)>;
828 def : CompressPat<(SUB GPRC:$rs1, GPRC:$rs1, GPRC:$rs2),
829 (C_SUB GPRC:$rs1, GPRC:$rs2)>;
830 def : CompressPat<(XOR GPRC:$rs1, GPRC:$rs1, GPRC:$rs2),
831 (C_XOR GPRC:$rs1, GPRC:$rs2)>;
832 def : CompressPat<(XOR GPRC:$rs1, GPRC:$rs2, GPRC:$rs1),
833 (C_XOR GPRC:$rs1, GPRC:$rs2)>;
834 def : CompressPat<(OR GPRC:$rs1, GPRC:$rs1, GPRC:$rs2),
835 (C_OR GPRC:$rs1, GPRC:$rs2)>;
836 def : CompressPat<(OR GPRC:$rs1, GPRC:$rs2, GPRC:$rs1),
837 (C_OR GPRC:$rs1, GPRC:$rs2)>;
838 def : CompressPat<(AND GPRC:$rs1, GPRC:$rs1, GPRC:$rs2),
839 (C_AND GPRC:$rs1, GPRC:$rs2)>;
840 def : CompressPat<(AND GPRC:$rs1, GPRC:$rs2, GPRC:$rs1),
841 (C_AND GPRC:$rs1, GPRC:$rs2)>;
842 } // Predicates = [HasStdExtC]
844 let Predicates = [HasStdExtC, IsRV64] in {
845 def : CompressPat<(ADDIW GPRNoX0:$rd, X0, simm6:$imm),
846 (C_LI GPRNoX0:$rd, simm6:$imm)>;
847 def : CompressPat<(SUBW GPRC:$rs1, GPRC:$rs1, GPRC:$rs2),
848 (C_SUBW GPRC:$rs1, GPRC:$rs2)>;
849 def : CompressPat<(ADDW GPRC:$rs1, GPRC:$rs1, GPRC:$rs2),
850 (C_ADDW GPRC:$rs1, GPRC:$rs2)>;
851 def : CompressPat<(ADDW GPRC:$rs1, GPRC:$rs2, GPRC:$rs1),
852 (C_ADDW GPRC:$rs1, GPRC:$rs2)>;
853 } // Predicates = [HasStdExtC, IsRV64]
855 let Predicates = [HasStdExtC] in {
856 def : CompressPat<(JAL X0, simm12_lsb0:$offset),
857 (C_J simm12_lsb0:$offset)>;
858 def : CompressPat<(BEQ GPRC:$rs1, X0, simm9_lsb0:$imm),
859 (C_BEQZ GPRC:$rs1, simm9_lsb0:$imm)>;
860 def : CompressPat<(BNE GPRC:$rs1, X0, simm9_lsb0:$imm),
861 (C_BNEZ GPRC:$rs1, simm9_lsb0:$imm)>;
862 } // Predicates = [HasStdExtC]
865 let Predicates = [HasStdExtC] in {
866 def : CompressPat<(SLLI GPRNoX0:$rs1, GPRNoX0:$rs1, uimmlog2xlennonzero:$imm),
867 (C_SLLI GPRNoX0:$rs1, uimmlog2xlennonzero:$imm)>;
868 } // Predicates = [HasStdExtC]
870 let Predicates = [HasStdExtC, HasStdExtD] in {
871 def : CompressPat<(FLD FPR64:$rd, SP:$rs1, uimm9_lsb000:$imm),
872 (C_FLDSP FPR64:$rd, SP:$rs1, uimm9_lsb000:$imm)>;
873 } // Predicates = [HasStdExtC, HasStdExtD]
875 let Predicates = [HasStdExtC] in {
876 def : CompressPat<(LW GPRNoX0:$rd, SP:$rs1, uimm8_lsb00:$imm),
877 (C_LWSP GPRNoX0:$rd, SP:$rs1, uimm8_lsb00:$imm)>;
878 } // Predicates = [HasStdExtC]
880 let Predicates = [HasStdExtC, HasStdExtF, IsRV32] in {
881 def : CompressPat<(FLW FPR32:$rd, SP:$rs1, uimm8_lsb00:$imm),
882 (C_FLWSP FPR32:$rd, SP:$rs1, uimm8_lsb00:$imm)>;
883 } // Predicates = [HasStdExtC, HasStdExtF, IsRV32]
885 let Predicates = [HasStdExtC, IsRV64] in {
886 def : CompressPat<(LD GPRNoX0:$rd, SP:$rs1, uimm9_lsb000:$imm),
887 (C_LDSP GPRNoX0:$rd, SP:$rs1, uimm9_lsb000:$imm)>;
888 } // Predicates = [HasStdExtC, IsRV64]
890 let Predicates = [HasStdExtC] in {
891 def : CompressPat<(JALR X0, GPRNoX0:$rs1, 0),
892 (C_JR GPRNoX0:$rs1)>;
893 def : CompressPat<(ADD GPRNoX0:$rs1, X0, GPRNoX0:$rs2),
894 (C_MV GPRNoX0:$rs1, GPRNoX0:$rs2)>;
895 def : CompressPat<(ADD GPRNoX0:$rs1, GPRNoX0:$rs2, X0),
896 (C_MV GPRNoX0:$rs1, GPRNoX0:$rs2)>;
897 def : CompressPat<(ADDI GPRNoX0:$rs1, GPRNoX0:$rs2, 0),
898 (C_MV GPRNoX0:$rs1, GPRNoX0:$rs2)>;
899 def : CompressPat<(EBREAK), (C_EBREAK)>;
900 def : CompressPat<(UNIMP), (C_UNIMP)>;
901 def : CompressPat<(JALR X1, GPRNoX0:$rs1, 0),
902 (C_JALR GPRNoX0:$rs1)>;
903 def : CompressPat<(ADD GPRNoX0:$rs1, GPRNoX0:$rs1, GPRNoX0:$rs2),
904 (C_ADD GPRNoX0:$rs1, GPRNoX0:$rs2)>;
905 def : CompressPat<(ADD GPRNoX0:$rs1, GPRNoX0:$rs2, GPRNoX0:$rs1),
906 (C_ADD GPRNoX0:$rs1, GPRNoX0:$rs2)>;
907 } // Predicates = [HasStdExtC]
909 let Predicates = [HasStdExtC, HasStdExtD] in {
910 def : CompressPat<(FSD FPR64:$rs2, SP:$rs1, uimm9_lsb000:$imm),
911 (C_FSDSP FPR64:$rs2, SP:$rs1, uimm9_lsb000:$imm)>;
912 } // Predicates = [HasStdExtC, HasStdExtD]
914 let Predicates = [HasStdExtC] in {
915 def : CompressPat<(SW GPR:$rs2, SP:$rs1, uimm8_lsb00:$imm),
916 (C_SWSP GPR:$rs2, SP:$rs1, uimm8_lsb00:$imm)>;
917 } // Predicates = [HasStdExtC]
919 let Predicates = [HasStdExtC, HasStdExtF, IsRV32] in {
920 def : CompressPat<(FSW FPR32:$rs2, SP:$rs1, uimm8_lsb00:$imm),
921 (C_FSWSP FPR32:$rs2, SP:$rs1, uimm8_lsb00:$imm)>;
922 } // Predicates = [HasStdExtC, HasStdExtF, IsRV32]
924 let Predicates = [HasStdExtC, IsRV64] in {
925 def : CompressPat<(SD GPR:$rs2, SP:$rs1, uimm9_lsb000:$imm),
926 (C_SDSP GPR:$rs2, SP:$rs1, uimm9_lsb000:$imm)>;
927 } // Predicates = [HasStdExtC, IsRV64]