1 //===- ARMInstrFormats.td - ARM 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 //===----------------------------------------------------------------------===//
12 // ARM Instruction Format Definitions.
15 // Format specifies the encoding used by the instruction. This is part of the
16 // ad-hoc solution used to emit machine instruction encodings by our machine
18 class Format<bits<5> val> {
22 def Pseudo : Format<1>;
23 def MulFrm : Format<2>;
24 def MulSMLAW : Format<3>;
25 def MulSMULW : Format<4>;
26 def MulSMLA : Format<5>;
27 def MulSMUL : Format<6>;
28 def Branch : Format<7>;
29 def BranchMisc : Format<8>;
31 def DPRdIm : Format<9>;
32 def DPRdReg : Format<10>;
33 def DPRdSoReg : Format<11>;
34 def DPRdMisc : Format<12>;
35 def DPRnIm : Format<13>;
36 def DPRnReg : Format<14>;
37 def DPRnSoReg : Format<15>;
38 def DPRIm : Format<16>;
39 def DPRReg : Format<17>;
40 def DPRSoReg : Format<18>;
41 def DPRImS : Format<19>;
42 def DPRRegS : Format<20>;
43 def DPRSoRegS : Format<21>;
45 def LdFrm : Format<22>;
46 def StFrm : Format<23>;
48 def ArithMisc : Format<24>;
49 def ThumbFrm : Format<25>;
50 def VFPFrm : Format<26>;
53 //===----------------------------------------------------------------------===//
55 // ARM Instruction templates.
58 class InstARM<bits<4> opcod, AddrMode am, SizeFlagVal sz, IndexMode im,
59 Format f, string cstr>
63 let Namespace = "ARM";
65 bits<4> Opcode = opcod;
67 bits<4> AddrModeBits = AM.Value;
70 bits<3> SizeFlag = SZ.Value;
73 bits<2> IndexModeBits = IM.Value;
76 bits<5> Form = F.Value;
78 let Constraints = cstr;
81 class PseudoInst<dag oops, dag iops, string asm, list<dag> pattern>
82 : InstARM<0, AddrModeNone, SizeSpecial, IndexModeNone, Pseudo, ""> {
83 let OutOperandList = oops;
84 let InOperandList = iops;
86 let Pattern = pattern;
89 // Almost all ARM instructions are predicable.
90 class I<bits<4> opcod, dag oops, dag iops, AddrMode am, SizeFlagVal sz,
91 IndexMode im, Format f, string opc, string asm, string cstr,
93 : InstARM<opcod, am, sz, im, f, cstr> {
94 let OutOperandList = oops;
95 let InOperandList = !con(iops, (ops pred:$p));
96 let AsmString = !strconcat(opc, !strconcat("${p}", asm));
97 let Pattern = pattern;
98 list<Predicate> Predicates = [IsARM];
101 // Same as I except it can optionally modify CPSR. Note it's modeled as
102 // an input operand since by default it's a zero register. It will
103 // become an implicit def once it's "flipped".
104 class sI<bits<4> opcod, dag oops, dag iops, AddrMode am, SizeFlagVal sz,
105 IndexMode im, Format f, string opc, string asm, string cstr,
107 : InstARM<opcod, am, sz, im, f, cstr> {
108 let OutOperandList = oops;
109 let InOperandList = !con(iops, (ops pred:$p, cc_out:$s));
110 let AsmString = !strconcat(opc, !strconcat("${p}${s}", asm));
111 let Pattern = pattern;
112 list<Predicate> Predicates = [IsARM];
115 class AI<bits<4> opcod, dag oops, dag iops, Format f, string opc,
116 string asm, list<dag> pattern>
117 : I<opcod, oops, iops, AddrModeNone, Size4Bytes, IndexModeNone, f, opc,
119 class AsI<bits<4> opcod, dag oops, dag iops, Format f, string opc,
120 string asm, list<dag> pattern>
121 : sI<opcod, oops, iops, AddrModeNone, Size4Bytes, IndexModeNone, f, opc,
123 class AI1<bits<4> opcod, dag oops, dag iops, Format f, string opc,
124 string asm, list<dag> pattern>
125 : I<opcod, oops, iops, AddrMode1, Size4Bytes, IndexModeNone, f, opc,
127 let Inst{21-24} = opcod;
130 class AsI1<bits<4> opcod, dag oops, dag iops, Format f, string opc,
131 string asm, list<dag> pattern>
132 : sI<opcod, oops, iops, AddrMode1, Size4Bytes, IndexModeNone, f, opc,
135 let Inst{21-24} = opcod;
139 class AI2<bits<4> opcod, dag oops, dag iops, Format f, string opc,
140 string asm, list<dag> pattern>
141 : I<opcod, oops, iops, AddrMode2, Size4Bytes, IndexModeNone, f, opc,
145 class AI2ldw<bits<4> opcod, dag oops, dag iops, Format f, string opc,
146 string asm, list<dag> pattern>
147 : AI2<opcod, oops, iops, f, opc, asm, pattern> {
148 let Inst{20} = 1; // load bit
149 let Inst{21} = 0; // W bit
150 let Inst{22} = 0; // B bit
151 let Inst{24} = 1; // P bit
153 class AI2ldb<bits<4> opcod, dag oops, dag iops, Format f, string opc,
154 string asm, list<dag> pattern>
155 : AI2<opcod, oops, iops, f, opc, asm, pattern> {
156 let Inst{20} = 1; // load bit
157 let Inst{21} = 0; // W bit
158 let Inst{22} = 1; // B bit
159 let Inst{24} = 1; // P bit
162 class AI3<bits<4> opcod, dag oops, dag iops, Format f, string opc,
163 string asm, list<dag> pattern>
164 : I<opcod, oops, iops, AddrMode3, Size4Bytes, IndexModeNone, f, opc,
166 class AI4<bits<4> opcod, dag oops, dag iops, Format f, string opc,
167 string asm, list<dag> pattern>
168 : I<opcod, oops, iops, AddrMode4, Size4Bytes, IndexModeNone, f, opc,
170 class AI1x2<bits<4> opcod, dag oops, dag iops, Format f, string opc,
171 string asm, list<dag> pattern>
172 : I<opcod, oops, iops, AddrMode1, Size8Bytes, IndexModeNone, f, opc,
176 class AI2pr<bits<4> opcod, dag oops, dag iops, Format f, string opc,
177 string asm, string cstr, list<dag> pattern>
178 : I<opcod, oops, iops, AddrMode2, Size4Bytes, IndexModePre, f, opc,
180 class AI3pr<bits<4> opcod, dag oops, dag iops, Format f, string opc,
181 string asm, string cstr, list<dag> pattern>
182 : I<opcod, oops, iops, AddrMode3, Size4Bytes, IndexModePre, f, opc,
186 class AI2po<bits<4> opcod, dag oops, dag iops, Format f, string opc,
187 string asm, string cstr, list<dag> pattern>
188 : I<opcod, oops, iops, AddrMode2, Size4Bytes, IndexModePost, f, opc,
190 class AI3po<bits<4> opcod, dag oops, dag iops, Format f, string opc,
191 string asm, string cstr, list<dag> pattern>
192 : I<opcod, oops, iops, AddrMode3, Size4Bytes, IndexModePost, f, opc,
197 class XI<bits<4> opcod, dag oops, dag iops, AddrMode am, SizeFlagVal sz,
198 IndexMode im, Format f, string asm, string cstr, list<dag> pattern>
199 : InstARM<opcod, am, sz, im, f, cstr> {
200 let OutOperandList = oops;
201 let InOperandList = iops;
203 let Pattern = pattern;
204 list<Predicate> Predicates = [IsARM];
207 class AXI<bits<4> opcod, dag oops, dag iops, Format f, string asm,
209 : XI<opcod, oops, iops, AddrModeNone, Size4Bytes, IndexModeNone, f, asm,
211 class AXI1<bits<4> opcod, dag oops, dag iops, Format f, string asm,
213 : XI<opcod, oops, iops, AddrMode1, Size4Bytes, IndexModeNone, f, asm,
215 class AXI2<bits<4> opcod, dag oops, dag iops, Format f, string asm,
217 : XI<opcod, oops, iops, AddrMode2, Size4Bytes, IndexModeNone, f, asm,
219 class AXI3<bits<4> opcod, dag oops, dag iops, Format f, string asm,
221 : XI<opcod, oops, iops, AddrMode3, Size4Bytes, IndexModeNone, f, asm,
223 class AXI4<bits<4> opcod, dag oops, dag iops, Format f, string asm,
225 : XI<opcod, oops, iops, AddrMode4, Size4Bytes, IndexModeNone, f, asm,
228 class AXIx2<bits<4> opcod, dag oops, dag iops, Format f, string asm,
230 : XI<opcod, oops, iops, AddrModeNone, Size8Bytes, IndexModeNone, f, asm,
233 // BR_JT instructions
234 class JTI<bits<4> opcod, dag oops, dag iops, string asm, list<dag> pattern>
235 : XI<opcod, oops, iops, AddrModeNone, SizeSpecial, IndexModeNone, BranchMisc,
237 class JTI1<bits<4> opcod, dag oops, dag iops, string asm, list<dag> pattern>
238 : XI<opcod, oops, iops, AddrMode1, SizeSpecial, IndexModeNone, BranchMisc,
240 class JTI2<bits<4> opcod, dag oops, dag iops, string asm, list<dag> pattern>
241 : XI<opcod, oops, iops, AddrMode2, SizeSpecial, IndexModeNone, BranchMisc,
245 //===----------------------------------------------------------------------===//
247 // ARMPat - Same as Pat<>, but requires that the compiler be in ARM mode.
248 class ARMPat<dag pattern, dag result> : Pat<pattern, result> {
249 list<Predicate> Predicates = [IsARM];
251 class ARMV5TEPat<dag pattern, dag result> : Pat<pattern, result> {
252 list<Predicate> Predicates = [IsARM, HasV5TE];
254 class ARMV6Pat<dag pattern, dag result> : Pat<pattern, result> {
255 list<Predicate> Predicates = [IsARM, HasV6];
258 //===----------------------------------------------------------------------===//
260 // Thumb Instruction Format Definitions.
264 // TI - Thumb instruction.
266 class ThumbI<dag outs, dag ins, AddrMode am, SizeFlagVal sz,
267 string asm, string cstr, list<dag> pattern>
268 // FIXME: Set all opcodes to 0 for now.
269 : InstARM<0, am, sz, IndexModeNone, ThumbFrm, cstr> {
270 let OutOperandList = outs;
271 let InOperandList = ins;
273 let Pattern = pattern;
274 list<Predicate> Predicates = [IsThumb];
277 class TI<dag outs, dag ins, string asm, list<dag> pattern>
278 : ThumbI<outs, ins, AddrModeNone, Size2Bytes, asm, "", pattern>;
279 class TI1<dag outs, dag ins, string asm, list<dag> pattern>
280 : ThumbI<outs, ins, AddrModeT1, Size2Bytes, asm, "", pattern>;
281 class TI2<dag outs, dag ins, string asm, list<dag> pattern>
282 : ThumbI<outs, ins, AddrModeT2, Size2Bytes, asm, "", pattern>;
283 class TI4<dag outs, dag ins, string asm, list<dag> pattern>
284 : ThumbI<outs, ins, AddrModeT4, Size2Bytes, asm, "", pattern>;
285 class TIs<dag outs, dag ins, string asm, list<dag> pattern>
286 : ThumbI<outs, ins, AddrModeTs, Size2Bytes, asm, "", pattern>;
288 // Two-address instructions
289 class TIt<dag outs, dag ins, string asm, list<dag> pattern>
290 : ThumbI<outs, ins, AddrModeNone, Size2Bytes, asm, "$lhs = $dst", pattern>;
292 // BL, BLX(1) are translated by assembler into two instructions
293 class TIx2<dag outs, dag ins, string asm, list<dag> pattern>
294 : ThumbI<outs, ins, AddrModeNone, Size4Bytes, asm, "", pattern>;
296 // BR_JT instructions
297 class TJTI<dag outs, dag ins, string asm, list<dag> pattern>
298 : ThumbI<outs, ins, AddrModeNone, SizeSpecial, asm, "", pattern>;
301 //===----------------------------------------------------------------------===//
304 // ThumbPat - Same as Pat<>, but requires that the compiler be in Thumb mode.
305 class ThumbPat<dag pattern, dag result> : Pat<pattern, result> {
306 list<Predicate> Predicates = [IsThumb];
309 class ThumbV5Pat<dag pattern, dag result> : Pat<pattern, result> {
310 list<Predicate> Predicates = [IsThumb, HasV5T];