1 //=- Mips32r6InstrFormats.td - Mips32r6 Instruction Formats -*- tablegen -*-==//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file describes Mips32r6 instruction formats.
12 //===----------------------------------------------------------------------===//
14 class MipsR6Inst : MipsInst<(outs), (ins), "", [], NoItinerary, FrmOther>,
16 let DecoderNamespace = "Mips32r6_64r6";
17 let EncodingPredicates = [HasStdEnc];
20 //===----------------------------------------------------------------------===//
24 //===----------------------------------------------------------------------===//
26 class OPGROUP<bits<6> Val> {
29 def OPGROUP_COP1 : OPGROUP<0b010001>;
30 def OPGROUP_COP2 : OPGROUP<0b010010>;
31 def OPGROUP_ADDI : OPGROUP<0b001000>;
32 def OPGROUP_AUI : OPGROUP<0b001111>;
33 def OPGROUP_BLEZ : OPGROUP<0b000110>;
34 def OPGROUP_BGTZ : OPGROUP<0b000111>;
35 def OPGROUP_BLEZL : OPGROUP<0b010110>;
36 def OPGROUP_BGTZL : OPGROUP<0b010111>;
37 def OPGROUP_DADDI : OPGROUP<0b011000>;
38 def OPGROUP_DAUI : OPGROUP<0b011101>;
39 def OPGROUP_PCREL : OPGROUP<0b111011>;
40 def OPGROUP_REGIMM : OPGROUP<0b000001>;
41 def OPGROUP_SPECIAL : OPGROUP<0b000000>;
42 // The spec occasionally names this value LL, LLD, SC, or SCD.
43 def OPGROUP_SPECIAL3 : OPGROUP<0b011111>;
44 // The spec names this constant LWC2, LDC2, SWC2, and SDC2 in different places.
45 def OPGROUP_COP2LDST : OPGROUP<0b010010>;
47 class OPCODE2<bits<2> Val> {
50 def OPCODE2_ADDIUPC : OPCODE2<0b00>;
51 def OPCODE2_LWPC : OPCODE2<0b01>;
52 def OPCODE2_LWUPC : OPCODE2<0b10>;
54 class OPCODE3<bits<3> Val> {
57 def OPCODE3_LDPC : OPCODE3<0b110>;
59 class OPCODE5<bits<5> Val> {
62 def OPCODE5_ALUIPC : OPCODE5<0b11111>;
63 def OPCODE5_AUIPC : OPCODE5<0b11110>;
64 def OPCODE5_DAHI : OPCODE5<0b00110>;
65 def OPCODE5_DATI : OPCODE5<0b11110>;
66 def OPCODE5_BC1EQZ : OPCODE5<0b01001>;
67 def OPCODE5_BC1NEZ : OPCODE5<0b01101>;
68 def OPCODE5_BC2EQZ : OPCODE5<0b01001>;
69 def OPCODE5_BC2NEZ : OPCODE5<0b01101>;
70 def OPCODE5_BGEZAL : OPCODE5<0b10001>;
71 // The next four constants are unnamed in the spec. These names are taken from
72 // the OPGROUP names they are used with.
73 def OPCODE5_LDC2 : OPCODE5<0b01110>;
74 def OPCODE5_LWC2 : OPCODE5<0b01010>;
75 def OPCODE5_SDC2 : OPCODE5<0b01111>;
76 def OPCODE5_SWC2 : OPCODE5<0b01011>;
78 class OPCODE6<bits<6> Val> {
81 def OPCODE6_ALIGN : OPCODE6<0b100000>;
82 def OPCODE6_DALIGN : OPCODE6<0b100100>;
83 def OPCODE6_BITSWAP : OPCODE6<0b100000>;
84 def OPCODE6_DBITSWAP : OPCODE6<0b100100>;
85 def OPCODE6_JALR : OPCODE6<0b001001>;
86 def OPCODE6_CACHE : OPCODE6<0b100101>;
87 def OPCODE6_PREF : OPCODE6<0b110101>;
88 // The next four constants are unnamed in the spec. These names are taken from
89 // the OPGROUP names they are used with.
90 def OPCODE6_LL : OPCODE6<0b110110>;
91 def OPCODE6_LLD : OPCODE6<0b110111>;
92 def OPCODE6_SC : OPCODE6<0b100110>;
93 def OPCODE6_SCD : OPCODE6<0b100111>;
95 class FIELD_FMT<bits<5> Val> {
98 def FIELD_FMT_S : FIELD_FMT<0b10000>;
99 def FIELD_FMT_D : FIELD_FMT<0b10001>;
101 class FIELD_CMP_COND<bits<5> Val> {
104 def FIELD_CMP_COND_F : FIELD_CMP_COND<0b00000>;
105 def FIELD_CMP_COND_UN : FIELD_CMP_COND<0b00001>;
106 def FIELD_CMP_COND_EQ : FIELD_CMP_COND<0b00010>;
107 def FIELD_CMP_COND_UEQ : FIELD_CMP_COND<0b00011>;
108 def FIELD_CMP_COND_OLT : FIELD_CMP_COND<0b00100>;
109 def FIELD_CMP_COND_ULT : FIELD_CMP_COND<0b00101>;
110 def FIELD_CMP_COND_OLE : FIELD_CMP_COND<0b00110>;
111 def FIELD_CMP_COND_ULE : FIELD_CMP_COND<0b00111>;
112 def FIELD_CMP_COND_SF : FIELD_CMP_COND<0b01000>;
113 def FIELD_CMP_COND_NGLE : FIELD_CMP_COND<0b01001>;
114 def FIELD_CMP_COND_SEQ : FIELD_CMP_COND<0b01010>;
115 def FIELD_CMP_COND_NGL : FIELD_CMP_COND<0b01011>;
116 def FIELD_CMP_COND_LT : FIELD_CMP_COND<0b01100>;
117 def FIELD_CMP_COND_NGE : FIELD_CMP_COND<0b01101>;
118 def FIELD_CMP_COND_LE : FIELD_CMP_COND<0b01110>;
119 def FIELD_CMP_COND_NGT : FIELD_CMP_COND<0b01111>;
121 class FIELD_CMP_FORMAT<bits<5> Val> {
124 def FIELD_CMP_FORMAT_S : FIELD_CMP_FORMAT<0b10100>;
125 def FIELD_CMP_FORMAT_D : FIELD_CMP_FORMAT<0b10101>;
127 //===----------------------------------------------------------------------===//
131 //===----------------------------------------------------------------------===//
133 // Some encodings are ambiguous except by comparing field values.
135 class DecodeDisambiguates<string Name> {
136 string DecoderMethod = !strconcat("Decode", Name);
139 class DecodeDisambiguatedBy<string Name> : DecodeDisambiguates<Name> {
140 string DecoderNamespace = "Mips32r6_64r6_Ambiguous";
143 //===----------------------------------------------------------------------===//
147 //===----------------------------------------------------------------------===//
149 class AUI_FM : MipsR6Inst {
156 let Inst{31-26} = OPGROUP_AUI.Value;
157 let Inst{25-21} = rs;
158 let Inst{20-16} = rt;
159 let Inst{15-0} = imm;
162 class DAUI_FM : AUI_FM {
163 let Inst{31-26} = OPGROUP_DAUI.Value;
166 class BAL_FM : MipsR6Inst {
171 let Inst{31-26} = OPGROUP_REGIMM.Value;
172 let Inst{25-21} = 0b00000;
173 let Inst{20-16} = OPCODE5_BGEZAL.Value;
174 let Inst{15-0} = offset;
177 class COP1_2R_FM<bits<6> funct, FIELD_FMT Format> : MipsR6Inst {
183 let Inst{31-26} = OPGROUP_COP1.Value;
184 let Inst{25-21} = Format.Value;
185 let Inst{20-16} = 0b00000;
186 let Inst{15-11} = fs;
188 let Inst{5-0} = funct;
191 class COP1_3R_FM<bits<6> funct, FIELD_FMT Format> : MipsR6Inst {
198 let Inst{31-26} = OPGROUP_COP1.Value;
199 let Inst{25-21} = Format.Value;
200 let Inst{20-16} = ft;
201 let Inst{15-11} = fs;
203 let Inst{5-0} = funct;
206 class COP1_BCCZ_FM<OPCODE5 Operation> : MipsR6Inst {
212 let Inst{31-26} = OPGROUP_COP1.Value;
213 let Inst{25-21} = Operation.Value;
214 let Inst{20-16} = ft;
215 let Inst{15-0} = offset;
218 class COP2_BCCZ_FM<OPCODE5 Operation> : MipsR6Inst {
224 let Inst{31-26} = OPGROUP_COP2.Value;
225 let Inst{25-21} = Operation.Value;
226 let Inst{20-16} = ct;
227 let Inst{15-0} = offset;
230 class PCREL16_FM<OPCODE5 Operation> : MipsR6Inst {
236 let Inst{31-26} = OPGROUP_PCREL.Value;
237 let Inst{25-21} = rs;
238 let Inst{20-16} = Operation.Value;
239 let Inst{15-0} = imm;
242 class PCREL19_FM<OPCODE2 Operation> : MipsR6Inst {
248 let Inst{31-26} = OPGROUP_PCREL.Value;
249 let Inst{25-21} = rs;
250 let Inst{20-19} = Operation.Value;
251 let Inst{18-0} = imm;
254 class PCREL18_FM<OPCODE3 Operation> : MipsR6Inst {
260 let Inst{31-26} = OPGROUP_PCREL.Value;
261 let Inst{25-21} = rs;
262 let Inst{20-18} = Operation.Value;
263 let Inst{17-0} = imm;
266 class SPECIAL3_2R_FM<OPCODE6 Operation> : MipsR6Inst {
272 let Inst{31-26} = OPGROUP_SPECIAL3.Value;
273 let Inst{25-21} = 0b00000;
274 let Inst{20-16} = rt;
275 let Inst{15-11} = rd;
276 let Inst{10-6} = 0b00000;
277 let Inst{5-0} = Operation.Value;
280 class SPECIAL3_MEM_FM<OPCODE6 Operation> : MipsR6Inst {
283 bits<5> base = addr{20-16};
284 bits<9> offset = addr{8-0};
288 let Inst{31-26} = OPGROUP_SPECIAL3.Value;
289 let Inst{25-21} = base;
290 let Inst{20-16} = hint;
291 let Inst{15-7} = offset;
293 let Inst{5-0} = Operation.Value;
296 class SPECIAL_3R_FM<bits<5> mulop, bits<6> funct> : MipsR6Inst {
303 let Inst{31-26} = OPGROUP_SPECIAL.Value;
304 let Inst{25-21} = rs;
305 let Inst{20-16} = rt;
306 let Inst{15-11} = rd;
307 let Inst{10-6} = mulop;
308 let Inst{5-0} = funct;
311 // This class is ambiguous with other branches:
312 // BEQC/BNEC require that rs > rt
313 class CMP_BRANCH_2R_OFF16_FM<OPGROUP funct> : MipsR6Inst {
320 let Inst{31-26} = funct.Value;
321 let Inst{25-21} = rs;
322 let Inst{20-16} = rt;
323 let Inst{15-0} = offset;
326 // This class is ambiguous with other branches:
327 // BLEZC/BGEZC/BEQZALC/BNEZALC/BGTZALC require that rs == 0 && rt != 0
328 // The '1R_RT' in the name means 1 register in the rt field.
329 class CMP_BRANCH_1R_RT_OFF16_FM<OPGROUP funct> : MipsR6Inst {
335 let Inst{31-26} = funct.Value;
336 let Inst{25-21} = 0b00000;
337 let Inst{20-16} = rt;
338 let Inst{15-0} = offset;
341 // This class is ambiguous with other branches:
342 // BLTZC/BGTZC/BLTZALC/BGEZALC require that rs == rt && rt != 0
343 // The '1R_BOTH' in the name means 1 register in both the rs and rt fields.
344 class CMP_BRANCH_1R_BOTH_OFF16_FM<OPGROUP funct> : MipsR6Inst {
350 let Inst{31-26} = funct.Value;
351 let Inst{25-21} = rt;
352 let Inst{20-16} = rt;
353 let Inst{15-0} = offset;
356 class CMP_BRANCH_OFF21_FM<bits<6> funct> : MipsR6Inst {
357 bits<5> rs; // rs != 0
362 let Inst{31-26} = funct;
363 let Inst{25-21} = rs;
364 let Inst{20-0} = offset;
367 class JMP_IDX_COMPACT_FM<bits<6> funct> : MipsR6Inst {
373 let Inst{31-26} = funct;
374 let Inst{25-21} = 0b000000;
375 let Inst{20-16} = rt;
376 let Inst{15-0} = offset;
379 class BRANCH_OFF26_FM<bits<6> funct> : MipsR6Inst {
383 let Inst{31-26} = funct;
384 let Inst{25-0} = offset;
387 class SPECIAL3_ALIGN_FM<OPCODE6 Operation> : MipsR6Inst {
395 let Inst{31-26} = OPGROUP_SPECIAL3.Value;
396 let Inst{25-21} = rs;
397 let Inst{20-16} = rt;
398 let Inst{15-11} = rd;
399 let Inst{10-8} = 0b010;
401 let Inst{5-0} = Operation.Value;
404 class SPECIAL3_DALIGN_FM<OPCODE6 Operation> : MipsR6Inst {
412 let Inst{31-26} = OPGROUP_SPECIAL3.Value;
413 let Inst{25-21} = rs;
414 let Inst{20-16} = rt;
415 let Inst{15-11} = rd;
416 let Inst{10-9} = 0b01;
418 let Inst{5-0} = Operation.Value;
421 class SPECIAL3_LL_SC_FM<OPCODE6 Operation> : MipsR6Inst {
424 bits<5> base = addr{20-16};
425 bits<9> offset = addr{8-0};
429 let Inst{31-26} = OPGROUP_SPECIAL3.Value;
430 let Inst{25-21} = base;
431 let Inst{20-16} = rt;
432 let Inst{15-7} = offset;
433 let Inst{5-0} = Operation.Value;
435 string DecoderMethod = "DecodeSpecial3LlSc";
438 class REGIMM_FM<OPCODE5 Operation> : MipsR6Inst {
444 let Inst{31-26} = OPGROUP_REGIMM.Value;
445 let Inst{25-21} = rs;
446 let Inst{20-16} = Operation.Value;
447 let Inst{15-0} = imm;
450 class COP1_CMP_CONDN_FM<FIELD_CMP_FORMAT Format,
451 FIELD_CMP_COND Cond> : MipsR6Inst {
458 let Inst{31-26} = OPGROUP_COP1.Value;
459 let Inst{25-21} = Format.Value;
460 let Inst{20-16} = ft;
461 let Inst{15-11} = fs;
464 let Inst{4-0} = Cond.Value;
467 class JR_HB_R6_FM<OPCODE6 Operation> : MipsR6Inst {
472 let Inst{31-26} = OPGROUP_SPECIAL.Value;
473 let Inst{25-21} = rs;
478 let Inst{5-0} = Operation.Value;
481 class COP2LDST_FM<OPCODE5 Operation> : MipsR6Inst {
484 bits<5> base = addr{20-16};
485 bits<11> offset = addr{10-0};
489 let Inst{31-26} = OPGROUP_COP2LDST.Value;
490 let Inst{25-21} = Operation.Value;
491 let Inst{20-16} = rt;
492 let Inst{15-11} = base;
493 let Inst{10-0} = offset;