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>;
44 class OPCODE2<bits<2> Val> {
47 def OPCODE2_ADDIUPC : OPCODE2<0b00>;
48 def OPCODE2_LWPC : OPCODE2<0b01>;
49 def OPCODE2_LWUPC : OPCODE2<0b10>;
51 class OPCODE5<bits<5> Val> {
54 def OPCODE5_ALUIPC : OPCODE5<0b11111>;
55 def OPCODE5_AUIPC : OPCODE5<0b11110>;
56 def OPCODE5_DAHI : OPCODE5<0b00110>;
57 def OPCODE5_DATI : OPCODE5<0b11110>;
58 def OPCODE5_BC1EQZ : OPCODE5<0b01001>;
59 def OPCODE5_BC1NEZ : OPCODE5<0b01101>;
60 def OPCODE5_BC2EQZ : OPCODE5<0b01001>;
61 def OPCODE5_BC2NEZ : OPCODE5<0b01101>;
63 class OPCODE6<bits<6> Val> {
66 def OPCODE6_ALIGN : OPCODE6<0b100000>;
67 def OPCODE6_DALIGN : OPCODE6<0b100100>;
68 def OPCODE6_BITSWAP : OPCODE6<0b100000>;
69 def OPCODE6_DBITSWAP : OPCODE6<0b100100>;
71 class FIELD_FMT<bits<5> Val> {
74 def FIELD_FMT_S : FIELD_FMT<0b10000>;
75 def FIELD_FMT_D : FIELD_FMT<0b10001>;
77 class FIELD_CMP_COND<bits<5> Val> {
80 def FIELD_CMP_COND_F : FIELD_CMP_COND<0b00000>;
81 def FIELD_CMP_COND_UN : FIELD_CMP_COND<0b00001>;
82 def FIELD_CMP_COND_EQ : FIELD_CMP_COND<0b00010>;
83 def FIELD_CMP_COND_UEQ : FIELD_CMP_COND<0b00011>;
84 def FIELD_CMP_COND_OLT : FIELD_CMP_COND<0b00100>;
85 def FIELD_CMP_COND_ULT : FIELD_CMP_COND<0b00101>;
86 def FIELD_CMP_COND_OLE : FIELD_CMP_COND<0b00110>;
87 def FIELD_CMP_COND_ULE : FIELD_CMP_COND<0b00111>;
88 def FIELD_CMP_COND_SF : FIELD_CMP_COND<0b01000>;
89 def FIELD_CMP_COND_NGLE : FIELD_CMP_COND<0b01001>;
90 def FIELD_CMP_COND_SEQ : FIELD_CMP_COND<0b01010>;
91 def FIELD_CMP_COND_NGL : FIELD_CMP_COND<0b01011>;
92 def FIELD_CMP_COND_LT : FIELD_CMP_COND<0b01100>;
93 def FIELD_CMP_COND_NGE : FIELD_CMP_COND<0b01101>;
94 def FIELD_CMP_COND_LE : FIELD_CMP_COND<0b01110>;
95 def FIELD_CMP_COND_NGT : FIELD_CMP_COND<0b01111>;
97 class FIELD_CMP_FORMAT<bits<5> Val> {
100 def FIELD_CMP_FORMAT_S : FIELD_CMP_FORMAT<0b10100>;
101 def FIELD_CMP_FORMAT_D : FIELD_CMP_FORMAT<0b10101>;
103 //===----------------------------------------------------------------------===//
107 //===----------------------------------------------------------------------===//
109 // Some encodings are ambiguous except by comparing field values.
111 class DecodeDisambiguates<string Name> {
112 string DecoderMethod = !strconcat("Decode", Name);
115 class DecodeDisambiguatedBy<string Name> : DecodeDisambiguates<Name> {
116 string DecoderNamespace = "Mips32r6_64r6_Ambiguous";
119 //===----------------------------------------------------------------------===//
123 //===----------------------------------------------------------------------===//
125 class AUI_FM : MipsR6Inst {
132 let Inst{31-26} = OPGROUP_AUI.Value;
133 let Inst{25-21} = rs;
134 let Inst{20-16} = rt;
135 let Inst{15-0} = imm;
138 class DAUI_FM : AUI_FM {
139 let Inst{31-26} = OPGROUP_DAUI.Value;
142 class COP1_2R_FM<bits<6> funct, FIELD_FMT Format> : MipsR6Inst {
148 let Inst{31-26} = OPGROUP_COP1.Value;
149 let Inst{25-21} = Format.Value;
150 let Inst{20-16} = 0b00000;
151 let Inst{15-11} = fs;
153 let Inst{5-0} = funct;
156 class COP1_3R_FM<bits<6> funct, FIELD_FMT Format> : MipsR6Inst {
163 let Inst{31-26} = OPGROUP_COP1.Value;
164 let Inst{25-21} = Format.Value;
165 let Inst{20-16} = ft;
166 let Inst{15-11} = fs;
168 let Inst{5-0} = funct;
171 class COP1_BCCZ_FM<OPCODE5 Operation> : MipsR6Inst {
177 let Inst{31-26} = OPGROUP_COP1.Value;
178 let Inst{25-21} = Operation.Value;
179 let Inst{20-16} = ft;
180 let Inst{15-0} = offset;
183 class COP2_BCCZ_FM<OPCODE5 Operation> : MipsR6Inst {
189 let Inst{31-26} = OPGROUP_COP2.Value;
190 let Inst{25-21} = Operation.Value;
191 let Inst{20-16} = ct;
192 let Inst{15-0} = offset;
195 class PCREL16_FM<OPCODE5 Operation> : MipsR6Inst {
201 let Inst{31-26} = OPGROUP_PCREL.Value;
202 let Inst{25-21} = rs;
203 let Inst{20-16} = Operation.Value;
204 let Inst{15-0} = imm;
207 class PCREL19_FM<OPCODE2 Operation> : MipsR6Inst {
213 let Inst{31-26} = OPGROUP_PCREL.Value;
214 let Inst{25-21} = rs;
215 let Inst{20-19} = Operation.Value;
216 let Inst{18-0} = imm;
219 class SPECIAL3_2R_FM<OPCODE6 Operation> : MipsR6Inst {
225 let Inst{31-26} = OPGROUP_SPECIAL3.Value;
226 let Inst{25-21} = 0b00000;
227 let Inst{20-16} = rt;
228 let Inst{15-11} = rd;
229 let Inst{10-6} = 0b00000;
230 let Inst{5-0} = Operation.Value;
233 class SPECIAL_3R_FM<bits<5> mulop, bits<6> funct> : MipsR6Inst {
240 let Inst{31-26} = OPGROUP_SPECIAL.Value;
241 let Inst{25-21} = rs;
242 let Inst{20-16} = rt;
243 let Inst{15-11} = rd;
244 let Inst{10-6} = mulop;
245 let Inst{5-0} = funct;
248 // This class is ambiguous with other branches:
249 // BEQC/BNEC require that rs > rt
250 class CMP_BRANCH_2R_OFF16_FM<OPGROUP funct> : MipsR6Inst {
257 let Inst{31-26} = funct.Value;
258 let Inst{25-21} = rs;
259 let Inst{20-16} = rt;
260 let Inst{15-0} = offset;
263 // This class is ambiguous with other branches:
264 // BLEZC/BGEZC/BEQZALC/BNEZALC/BGTZALC require that rs == 0 && rt != 0
265 // The '1R_RT' in the name means 1 register in the rt field.
266 class CMP_BRANCH_1R_RT_OFF16_FM<OPGROUP funct> : MipsR6Inst {
272 let Inst{31-26} = funct.Value;
273 let Inst{25-21} = 0b00000;
274 let Inst{20-16} = rt;
275 let Inst{15-0} = offset;
278 // This class is ambiguous with other branches:
279 // BLTZC/BGTZC/BLTZALC/BGEZALC require that rs == rt && rt != 0
280 // The '1R_BOTH' in the name means 1 register in both the rs and rt fields.
281 class CMP_BRANCH_1R_BOTH_OFF16_FM<OPGROUP funct> : MipsR6Inst {
287 let Inst{31-26} = funct.Value;
288 let Inst{25-21} = rt;
289 let Inst{20-16} = rt;
290 let Inst{15-0} = offset;
293 class CMP_BRANCH_OFF21_FM<bits<6> funct> : MipsR6Inst {
294 bits<5> rs; // rs != 0
299 let Inst{31-26} = funct;
300 let Inst{25-21} = rs;
301 let Inst{20-0} = offset;
304 class JMP_IDX_COMPACT_FM<bits<6> funct> : MipsR6Inst {
310 let Inst{31-26} = funct;
311 let Inst{25-21} = 0b000000;
312 let Inst{20-16} = rt;
313 let Inst{15-0} = offset;
316 class BRANCH_OFF26_FM<bits<6> funct> : MipsR6Inst {
320 let Inst{31-26} = funct;
321 let Inst{25-0} = offset;
324 class SPECIAL3_ALIGN_FM<OPCODE6 Operation> : MipsR6Inst {
332 let Inst{31-26} = OPGROUP_SPECIAL3.Value;
333 let Inst{25-21} = rs;
334 let Inst{20-16} = rt;
335 let Inst{15-11} = rd;
336 let Inst{10-8} = 0b010;
338 let Inst{5-0} = Operation.Value;
341 class SPECIAL3_DALIGN_FM<OPCODE6 Operation> : MipsR6Inst {
349 let Inst{31-26} = OPGROUP_SPECIAL3.Value;
350 let Inst{25-21} = rs;
351 let Inst{20-16} = rt;
352 let Inst{15-11} = rd;
353 let Inst{10-9} = 0b01;
355 let Inst{5-0} = Operation.Value;
358 class REGIMM_FM<OPCODE5 Operation> : MipsR6Inst {
364 let Inst{31-26} = OPGROUP_REGIMM.Value;
365 let Inst{25-21} = rs;
366 let Inst{20-16} = Operation.Value;
367 let Inst{15-0} = imm;
370 class COP1_CMP_CONDN_FM<FIELD_CMP_FORMAT Format,
371 FIELD_CMP_COND Cond> : MipsR6Inst {
378 let Inst{31-26} = OPGROUP_COP1.Value;
379 let Inst{25-21} = Format.Value;
380 let Inst{20-16} = ft;
381 let Inst{15-11} = fs;
384 let Inst{4-0} = Cond.Value;