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 def OPGROUP_SPECIAL3 : OPGROUP<0b011111>;
43 // The spec names this constant LWC2, LDC2, SWC2, and SDC2 in different places.
44 def OPGROUP_COP2LDST : OPGROUP<0b010010>;
46 class OPCODE2<bits<2> Val> {
49 def OPCODE2_ADDIUPC : OPCODE2<0b00>;
50 def OPCODE2_LWPC : OPCODE2<0b01>;
51 def OPCODE2_LWUPC : OPCODE2<0b10>;
53 class OPCODE3<bits<3> Val> {
56 def OPCODE3_LDPC : OPCODE3<0b110>;
58 class OPCODE5<bits<5> Val> {
61 def OPCODE5_ALUIPC : OPCODE5<0b11111>;
62 def OPCODE5_AUIPC : OPCODE5<0b11110>;
63 def OPCODE5_DAHI : OPCODE5<0b00110>;
64 def OPCODE5_DATI : OPCODE5<0b11110>;
65 def OPCODE5_BC1EQZ : OPCODE5<0b01001>;
66 def OPCODE5_BC1NEZ : OPCODE5<0b01101>;
67 def OPCODE5_BC2EQZ : OPCODE5<0b01001>;
68 def OPCODE5_BC2NEZ : OPCODE5<0b01101>;
69 def OPCODE5_BGEZAL : OPCODE5<0b10001>;
70 // The next four constants are unnamed in the spec. These names are taken from
71 // the OPGROUP names they are used with.
72 def OPCODE5_LDC2 : OPCODE5<0b01110>;
73 def OPCODE5_LWC2 : OPCODE5<0b01010>;
74 def OPCODE5_SDC2 : OPCODE5<0b01111>;
75 def OPCODE5_SWC2 : OPCODE5<0b01011>;
77 class OPCODE6<bits<6> Val> {
80 def OPCODE6_ALIGN : OPCODE6<0b100000>;
81 def OPCODE6_DALIGN : OPCODE6<0b100100>;
82 def OPCODE6_BITSWAP : OPCODE6<0b100000>;
83 def OPCODE6_DBITSWAP : OPCODE6<0b100100>;
84 def OPCODE6_JALR : OPCODE6<0b001001>;
85 def OPCODE6_CACHE : OPCODE6<0b100101>;
86 def OPCODE6_PREF : OPCODE6<0b110101>;
88 class FIELD_FMT<bits<5> Val> {
91 def FIELD_FMT_S : FIELD_FMT<0b10000>;
92 def FIELD_FMT_D : FIELD_FMT<0b10001>;
94 class FIELD_CMP_COND<bits<5> Val> {
97 def FIELD_CMP_COND_F : FIELD_CMP_COND<0b00000>;
98 def FIELD_CMP_COND_UN : FIELD_CMP_COND<0b00001>;
99 def FIELD_CMP_COND_EQ : FIELD_CMP_COND<0b00010>;
100 def FIELD_CMP_COND_UEQ : FIELD_CMP_COND<0b00011>;
101 def FIELD_CMP_COND_OLT : FIELD_CMP_COND<0b00100>;
102 def FIELD_CMP_COND_ULT : FIELD_CMP_COND<0b00101>;
103 def FIELD_CMP_COND_OLE : FIELD_CMP_COND<0b00110>;
104 def FIELD_CMP_COND_ULE : FIELD_CMP_COND<0b00111>;
105 def FIELD_CMP_COND_SF : FIELD_CMP_COND<0b01000>;
106 def FIELD_CMP_COND_NGLE : FIELD_CMP_COND<0b01001>;
107 def FIELD_CMP_COND_SEQ : FIELD_CMP_COND<0b01010>;
108 def FIELD_CMP_COND_NGL : FIELD_CMP_COND<0b01011>;
109 def FIELD_CMP_COND_LT : FIELD_CMP_COND<0b01100>;
110 def FIELD_CMP_COND_NGE : FIELD_CMP_COND<0b01101>;
111 def FIELD_CMP_COND_LE : FIELD_CMP_COND<0b01110>;
112 def FIELD_CMP_COND_NGT : FIELD_CMP_COND<0b01111>;
114 class FIELD_CMP_FORMAT<bits<5> Val> {
117 def FIELD_CMP_FORMAT_S : FIELD_CMP_FORMAT<0b10100>;
118 def FIELD_CMP_FORMAT_D : FIELD_CMP_FORMAT<0b10101>;
120 //===----------------------------------------------------------------------===//
124 //===----------------------------------------------------------------------===//
126 // Some encodings are ambiguous except by comparing field values.
128 class DecodeDisambiguates<string Name> {
129 string DecoderMethod = !strconcat("Decode", Name);
132 class DecodeDisambiguatedBy<string Name> : DecodeDisambiguates<Name> {
133 string DecoderNamespace = "Mips32r6_64r6_Ambiguous";
136 //===----------------------------------------------------------------------===//
140 //===----------------------------------------------------------------------===//
142 class AUI_FM : MipsR6Inst {
149 let Inst{31-26} = OPGROUP_AUI.Value;
150 let Inst{25-21} = rs;
151 let Inst{20-16} = rt;
152 let Inst{15-0} = imm;
155 class DAUI_FM : AUI_FM {
156 let Inst{31-26} = OPGROUP_DAUI.Value;
159 class BAL_FM : MipsR6Inst {
164 let Inst{31-26} = OPGROUP_REGIMM.Value;
165 let Inst{25-21} = 0b00000;
166 let Inst{20-16} = OPCODE5_BGEZAL.Value;
167 let Inst{15-0} = offset;
170 class COP1_2R_FM<bits<6> funct, FIELD_FMT Format> : MipsR6Inst {
176 let Inst{31-26} = OPGROUP_COP1.Value;
177 let Inst{25-21} = Format.Value;
178 let Inst{20-16} = 0b00000;
179 let Inst{15-11} = fs;
181 let Inst{5-0} = funct;
184 class COP1_3R_FM<bits<6> funct, FIELD_FMT Format> : MipsR6Inst {
191 let Inst{31-26} = OPGROUP_COP1.Value;
192 let Inst{25-21} = Format.Value;
193 let Inst{20-16} = ft;
194 let Inst{15-11} = fs;
196 let Inst{5-0} = funct;
199 class COP1_BCCZ_FM<OPCODE5 Operation> : MipsR6Inst {
205 let Inst{31-26} = OPGROUP_COP1.Value;
206 let Inst{25-21} = Operation.Value;
207 let Inst{20-16} = ft;
208 let Inst{15-0} = offset;
211 class COP2_BCCZ_FM<OPCODE5 Operation> : MipsR6Inst {
217 let Inst{31-26} = OPGROUP_COP2.Value;
218 let Inst{25-21} = Operation.Value;
219 let Inst{20-16} = ct;
220 let Inst{15-0} = offset;
223 class PCREL16_FM<OPCODE5 Operation> : MipsR6Inst {
229 let Inst{31-26} = OPGROUP_PCREL.Value;
230 let Inst{25-21} = rs;
231 let Inst{20-16} = Operation.Value;
232 let Inst{15-0} = imm;
235 class PCREL19_FM<OPCODE2 Operation> : MipsR6Inst {
241 let Inst{31-26} = OPGROUP_PCREL.Value;
242 let Inst{25-21} = rs;
243 let Inst{20-19} = Operation.Value;
244 let Inst{18-0} = imm;
247 class PCREL18_FM<OPCODE3 Operation> : MipsR6Inst {
253 let Inst{31-26} = OPGROUP_PCREL.Value;
254 let Inst{25-21} = rs;
255 let Inst{20-18} = Operation.Value;
256 let Inst{17-0} = imm;
259 class SPECIAL3_2R_FM<OPCODE6 Operation> : MipsR6Inst {
265 let Inst{31-26} = OPGROUP_SPECIAL3.Value;
266 let Inst{25-21} = 0b00000;
267 let Inst{20-16} = rt;
268 let Inst{15-11} = rd;
269 let Inst{10-6} = 0b00000;
270 let Inst{5-0} = Operation.Value;
273 class SPECIAL3_MEM_FM<OPCODE6 Operation> : MipsR6Inst {
276 bits<5> base = addr{20-16};
277 bits<9> offset = addr{8-0};
281 let Inst{31-26} = OPGROUP_SPECIAL3.Value;
282 let Inst{25-21} = base;
283 let Inst{20-16} = hint;
284 let Inst{15-7} = offset;
286 let Inst{5-0} = Operation.Value;
289 class SPECIAL_3R_FM<bits<5> mulop, bits<6> funct> : MipsR6Inst {
296 let Inst{31-26} = OPGROUP_SPECIAL.Value;
297 let Inst{25-21} = rs;
298 let Inst{20-16} = rt;
299 let Inst{15-11} = rd;
300 let Inst{10-6} = mulop;
301 let Inst{5-0} = funct;
304 // This class is ambiguous with other branches:
305 // BEQC/BNEC require that rs > rt
306 class CMP_BRANCH_2R_OFF16_FM<OPGROUP funct> : MipsR6Inst {
313 let Inst{31-26} = funct.Value;
314 let Inst{25-21} = rs;
315 let Inst{20-16} = rt;
316 let Inst{15-0} = offset;
319 // This class is ambiguous with other branches:
320 // BLEZC/BGEZC/BEQZALC/BNEZALC/BGTZALC require that rs == 0 && rt != 0
321 // The '1R_RT' in the name means 1 register in the rt field.
322 class CMP_BRANCH_1R_RT_OFF16_FM<OPGROUP funct> : MipsR6Inst {
328 let Inst{31-26} = funct.Value;
329 let Inst{25-21} = 0b00000;
330 let Inst{20-16} = rt;
331 let Inst{15-0} = offset;
334 // This class is ambiguous with other branches:
335 // BLTZC/BGTZC/BLTZALC/BGEZALC require that rs == rt && rt != 0
336 // The '1R_BOTH' in the name means 1 register in both the rs and rt fields.
337 class CMP_BRANCH_1R_BOTH_OFF16_FM<OPGROUP funct> : MipsR6Inst {
343 let Inst{31-26} = funct.Value;
344 let Inst{25-21} = rt;
345 let Inst{20-16} = rt;
346 let Inst{15-0} = offset;
349 class CMP_BRANCH_OFF21_FM<bits<6> funct> : MipsR6Inst {
350 bits<5> rs; // rs != 0
355 let Inst{31-26} = funct;
356 let Inst{25-21} = rs;
357 let Inst{20-0} = offset;
360 class JMP_IDX_COMPACT_FM<bits<6> funct> : MipsR6Inst {
366 let Inst{31-26} = funct;
367 let Inst{25-21} = 0b000000;
368 let Inst{20-16} = rt;
369 let Inst{15-0} = offset;
372 class BRANCH_OFF26_FM<bits<6> funct> : MipsR6Inst {
376 let Inst{31-26} = funct;
377 let Inst{25-0} = offset;
380 class SPECIAL3_ALIGN_FM<OPCODE6 Operation> : MipsR6Inst {
388 let Inst{31-26} = OPGROUP_SPECIAL3.Value;
389 let Inst{25-21} = rs;
390 let Inst{20-16} = rt;
391 let Inst{15-11} = rd;
392 let Inst{10-8} = 0b010;
394 let Inst{5-0} = Operation.Value;
397 class SPECIAL3_DALIGN_FM<OPCODE6 Operation> : MipsR6Inst {
405 let Inst{31-26} = OPGROUP_SPECIAL3.Value;
406 let Inst{25-21} = rs;
407 let Inst{20-16} = rt;
408 let Inst{15-11} = rd;
409 let Inst{10-9} = 0b01;
411 let Inst{5-0} = Operation.Value;
414 class REGIMM_FM<OPCODE5 Operation> : MipsR6Inst {
420 let Inst{31-26} = OPGROUP_REGIMM.Value;
421 let Inst{25-21} = rs;
422 let Inst{20-16} = Operation.Value;
423 let Inst{15-0} = imm;
426 class COP1_CMP_CONDN_FM<FIELD_CMP_FORMAT Format,
427 FIELD_CMP_COND Cond> : MipsR6Inst {
434 let Inst{31-26} = OPGROUP_COP1.Value;
435 let Inst{25-21} = Format.Value;
436 let Inst{20-16} = ft;
437 let Inst{15-11} = fs;
440 let Inst{4-0} = Cond.Value;
443 class JR_HB_R6_FM<OPCODE6 Operation> : MipsR6Inst {
448 let Inst{31-26} = OPGROUP_SPECIAL.Value;
449 let Inst{25-21} = rs;
454 let Inst{5-0} = Operation.Value;
457 class COP2LDST_FM<OPCODE5 Operation> : MipsR6Inst {
460 bits<5> base = addr{20-16};
461 bits<11> offset = addr{10-0};
465 let Inst{31-26} = OPGROUP_COP2LDST.Value;
466 let Inst{25-21} = Operation.Value;
467 let Inst{20-16} = rt;
468 let Inst{15-11} = base;
469 let Inst{10-0} = offset;