1 //===-- HexagonRegisterInfo.td - Hexagon Register defs -----*- 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 //===----------------------------------------------------------------------===//
11 // Declarations that describe the Hexagon register file.
12 //===----------------------------------------------------------------------===//
14 let Namespace = "Hexagon" in {
16 class HexagonReg<bits<5> num, string n, list<string> alt = [],
17 list<Register> alias = []> : Register<n> {
20 let HWEncoding{4-0} = num;
23 class HexagonDoubleReg<bits<5> num, string n, list<Register> subregs,
24 list<string> alt = []> :
25 RegisterWithSubRegs<n, subregs> {
29 let HWEncoding{4-0} = num;
32 // Registers are identified with 5-bit ID numbers.
33 // Ri - 32-bit integer registers.
34 class Ri<bits<5> num, string n, list<string> alt = []> : HexagonReg<num, n, alt> {
38 // Rf - 32-bit floating-point registers.
39 class Rf<bits<5> num, string n> : HexagonReg<num, n> {
44 // Rd - 64-bit registers.
45 class Rd<bits<5> num, string n, list<Register> subregs> :
46 HexagonDoubleReg<num, n, subregs> {
48 let SubRegs = subregs;
51 // Rp - predicate registers
52 class Rp<bits<5> num, string n> : HexagonReg<num, n> {
57 // Rq - vector predicate registers
58 class Rq<bits<3> num, string n> : Register<n, []> {
59 let HWEncoding{2-0} = num;
62 // Rc - control registers
63 class Rc<bits<5> num, string n,
64 list<string> alt = [], list<Register> alias = []> :
65 HexagonReg<num, n, alt, alias> {
69 // Rcc - 64-bit control registers.
70 class Rcc<bits<5> num, string n, list<Register> subregs,
71 list<string> alt = []> :
72 HexagonDoubleReg<num, n, subregs, alt> {
74 let SubRegs = subregs;
77 // Mx - address modifier registers
78 class Mx<bits<1> num, string n> : HexagonReg<{0b0000, num}, n> {
79 let Num = !cast<bits<5>>(num);
82 def subreg_loreg : SubRegIndex<32>;
83 def subreg_hireg : SubRegIndex<32, 32>;
84 def subreg_overflow : SubRegIndex<1, 0>;
88 def R#i : Ri<i, "r"#i>, DwarfRegNum<[i]>;
91 def R29 : Ri<29, "r29", ["sp"]>, DwarfRegNum<[29]>;
92 def R30 : Ri<30, "r30", ["fp"]>, DwarfRegNum<[30]>;
93 def R31 : Ri<31, "r31", ["lr"]>, DwarfRegNum<[31]>;
95 // Aliases of the R* registers used to hold 64-bit int values (doubles).
96 let SubRegIndices = [subreg_loreg, subreg_hireg], CoveredBySubRegs = 1 in {
97 def D0 : Rd< 0, "r1:0", [R0, R1]>, DwarfRegNum<[32]>;
98 def D1 : Rd< 2, "r3:2", [R2, R3]>, DwarfRegNum<[34]>;
99 def D2 : Rd< 4, "r5:4", [R4, R5]>, DwarfRegNum<[36]>;
100 def D3 : Rd< 6, "r7:6", [R6, R7]>, DwarfRegNum<[38]>;
101 def D4 : Rd< 8, "r9:8", [R8, R9]>, DwarfRegNum<[40]>;
102 def D5 : Rd<10, "r11:10", [R10, R11]>, DwarfRegNum<[42]>;
103 def D6 : Rd<12, "r13:12", [R12, R13]>, DwarfRegNum<[44]>;
104 def D7 : Rd<14, "r15:14", [R14, R15]>, DwarfRegNum<[46]>;
105 def D8 : Rd<16, "r17:16", [R16, R17]>, DwarfRegNum<[48]>;
106 def D9 : Rd<18, "r19:18", [R18, R19]>, DwarfRegNum<[50]>;
107 def D10 : Rd<20, "r21:20", [R20, R21]>, DwarfRegNum<[52]>;
108 def D11 : Rd<22, "r23:22", [R22, R23]>, DwarfRegNum<[54]>;
109 def D12 : Rd<24, "r25:24", [R24, R25]>, DwarfRegNum<[56]>;
110 def D13 : Rd<26, "r27:26", [R26, R27]>, DwarfRegNum<[58]>;
111 def D14 : Rd<28, "r29:28", [R28, R29]>, DwarfRegNum<[60]>;
112 def D15 : Rd<30, "r31:30", [R30, R31]>, DwarfRegNum<[62]>;
115 // Predicate registers.
116 def P0 : Rp<0, "p0">, DwarfRegNum<[63]>;
117 def P1 : Rp<1, "p1">, DwarfRegNum<[64]>;
118 def P2 : Rp<2, "p2">, DwarfRegNum<[65]>;
119 def P3 : Rp<3, "p3">, DwarfRegNum<[66]>;
121 // Modifier registers.
122 // C6 and C7 can also be M0 and M1, but register names must be unique, even
123 // if belonging to different register classes.
124 def M0 : Mx<0, "m0">, DwarfRegNum<[72]>;
125 def M1 : Mx<1, "m1">, DwarfRegNum<[73]>;
127 // Fake register to represent USR.OVF bit. Artihmetic/saturating instruc-
128 // tions modify this bit, and multiple such instructions are allowed in the
129 // same packet. We need to ignore output dependencies on this bit, but not
130 // on the entire USR.
131 def USR_OVF : Rc<?, "usr.ovf">;
133 // Control registers.
134 def SA0 : Rc<0, "sa0", ["c0"]>, DwarfRegNum<[67]>;
135 def LC0 : Rc<1, "lc0", ["c1"]>, DwarfRegNum<[68]>;
136 def SA1 : Rc<2, "sa1", ["c2"]>, DwarfRegNum<[69]>;
137 def LC1 : Rc<3, "lc1", ["c3"]>, DwarfRegNum<[70]>;
138 def P3_0 : Rc<4, "p3:0", ["c4"], [P0, P1, P2, P3]>,
140 def C5 : Rc<5, "c5", ["c5"]>, DwarfRegNum<[72]>; // future use
141 def C6 : Rc<6, "c6", [], [M0]>, DwarfRegNum<[73]>;
142 def C7 : Rc<7, "c7", [], [M1]>, DwarfRegNum<[74]>;
144 def USR : Rc<8, "usr", ["c8"]>, DwarfRegNum<[75]> {
145 let SubRegIndices = [subreg_overflow];
146 let SubRegs = [USR_OVF];
148 def PC : Rc<9, "pc">, DwarfRegNum<[76]>;
149 def UGP : Rc<10, "ugp", ["c10"]>, DwarfRegNum<[77]>;
150 def GP : Rc<11, "gp">, DwarfRegNum<[78]>;
151 def CS0 : Rc<12, "cs0", ["c12"]>, DwarfRegNum<[79]>;
152 def CS1 : Rc<13, "cs1", ["c13"]>, DwarfRegNum<[80]>;
153 def UPCL : Rc<14, "upcyclelo", ["c14"]>, DwarfRegNum<[81]>;
154 def UPCH : Rc<15, "upcyclehi", ["c15"]>, DwarfRegNum<[82]>;
157 // Control registers pairs.
158 let SubRegIndices = [subreg_loreg, subreg_hireg], CoveredBySubRegs = 1 in {
159 def C1_0 : Rcc<0, "c1:0", [SA0, LC0], ["lc0:sa0"]>, DwarfRegNum<[67]>;
160 def C3_2 : Rcc<2, "c3:2", [SA1, LC1], ["lc1:sa1"]>, DwarfRegNum<[69]>;
161 def C7_6 : Rcc<6, "c7:6", [C6, C7], ["m1:0"]>, DwarfRegNum<[72]>;
162 def C9_8 : Rcc<8, "c9:8", [USR, PC]>, DwarfRegNum<[74]>;
163 def C11_10 : Rcc<10, "c11:10", [UGP, GP]>, DwarfRegNum<[76]>;
164 def CS : Rcc<12, "c13:12", [CS0, CS1], ["cs1:0"]>, DwarfRegNum<[78]>;
165 def UPC : Rcc<14, "c15:14", [UPCL, UPCH]>, DwarfRegNum<[80]>;
168 foreach i = 0-31 in {
169 def V#i : Ri<i, "v"#i>, DwarfRegNum<[!add(i, 99)]>;
172 // Aliases of the V* registers used to hold double vec values.
173 let SubRegIndices = [subreg_loreg, subreg_hireg], CoveredBySubRegs = 1 in {
174 def W0 : Rd< 0, "v1:0", [V0, V1]>, DwarfRegNum<[99]>;
175 def W1 : Rd< 2, "v3:2", [V2, V3]>, DwarfRegNum<[101]>;
176 def W2 : Rd< 4, "v5:4", [V4, V5]>, DwarfRegNum<[103]>;
177 def W3 : Rd< 6, "v7:6", [V6, V7]>, DwarfRegNum<[105]>;
178 def W4 : Rd< 8, "v9:8", [V8, V9]>, DwarfRegNum<[107]>;
179 def W5 : Rd<10, "v11:10", [V10, V11]>, DwarfRegNum<[109]>;
180 def W6 : Rd<12, "v13:12", [V12, V13]>, DwarfRegNum<[111]>;
181 def W7 : Rd<14, "v15:14", [V14, V15]>, DwarfRegNum<[113]>;
182 def W8 : Rd<16, "v17:16", [V16, V17]>, DwarfRegNum<[115]>;
183 def W9 : Rd<18, "v19:18", [V18, V19]>, DwarfRegNum<[117]>;
184 def W10 : Rd<20, "v21:20", [V20, V21]>, DwarfRegNum<[119]>;
185 def W11 : Rd<22, "v23:22", [V22, V23]>, DwarfRegNum<[121]>;
186 def W12 : Rd<24, "v25:24", [V24, V25]>, DwarfRegNum<[123]>;
187 def W13 : Rd<26, "v27:26", [V26, V27]>, DwarfRegNum<[125]>;
188 def W14 : Rd<28, "v29:28", [V28, V29]>, DwarfRegNum<[127]>;
189 def W15 : Rd<30, "v31:30", [V30, V31]>, DwarfRegNum<[129]>;
192 // Vector Predicate registers.
193 def Q0 : Rq<0, "q0">, DwarfRegNum<[131]>;
194 def Q1 : Rq<1, "q1">, DwarfRegNum<[132]>;
195 def Q2 : Rq<2, "q2">, DwarfRegNum<[133]>;
196 def Q3 : Rq<3, "q3">, DwarfRegNum<[134]>;
200 // FIXME: the register order should be defined in terms of the preferred
201 // allocation order...
203 def IntRegs : RegisterClass<"Hexagon", [i32, f32, v4i8, v2i16], 32,
204 (add (sequence "R%u", 0, 9),
205 (sequence "R%u", 12, 28),
206 R10, R11, R29, R30, R31)> {
209 // Registers are listed in reverse order for allocation preference reasons.
210 def IntRegsLow8 : RegisterClass<"Hexagon", [i32], 32,
211 (add R7, R6, R5, R4, R3, R2, R1, R0)> ;
213 def DoubleRegs : RegisterClass<"Hexagon", [i64, f64, v8i8, v4i16, v2i32], 64,
214 (add (sequence "D%u", 0, 4),
215 (sequence "D%u", 6, 13), D5, D14, D15)>;
217 def VectorRegs : RegisterClass<"Hexagon", [v64i8, v32i16, v16i32, v8i64], 512,
218 (add (sequence "V%u", 0, 31))>;
220 def VecDblRegs : RegisterClass<"Hexagon",
221 [v128i8, v64i16, v32i32, v16i64], 1024,
222 (add (sequence "W%u", 0, 15))>;
224 def VectorRegs128B : RegisterClass<"Hexagon",
225 [v128i8, v64i16, v32i32, v16i64], 1024,
226 (add (sequence "V%u", 0, 31))>;
228 def VecDblRegs128B : RegisterClass<"Hexagon",
229 [v256i8,v128i16,v64i32,v32i64], 2048,
230 (add (sequence "W%u", 0, 15))>;
232 def VecPredRegs : RegisterClass<"Hexagon", [v512i1], 512,
233 (add (sequence "Q%u", 0, 3))>;
235 def VecPredRegs128B : RegisterClass<"Hexagon", [v1024i1], 1024,
236 (add (sequence "Q%u", 0, 3))>;
238 def PredRegs : RegisterClass<"Hexagon",
239 [i1, v2i1, v4i1, v8i1, v4i8, v2i16, i32], 32,
240 (add (sequence "P%u", 0, 3))>
246 def ModRegs : RegisterClass<"Hexagon", [i32], 32, (add M0, M1)>;
248 let Size = 32, isAllocatable = 0 in
249 def CtrRegs : RegisterClass<"Hexagon", [i32], 32,
250 (add LC0, SA0, LC1, SA1,
252 M0, M1, C6, C7, CS0, CS1, UPCL, UPCH,
253 USR, USR_OVF, UGP, GP, PC)>;
255 let Size = 64, isAllocatable = 0 in
256 def CtrRegs64 : RegisterClass<"Hexagon", [i64], 64,
257 (add C1_0, C3_2, C7_6, C9_8, C11_10, CS, UPC)>;
260 list<Register> Regs = [D0, D1, D2, D3, D4, D5, D6, D7,
264 LC0, LC1, SA0, SA1, USR, USR_OVF];
267 def PositiveHalfWord : PatLeaf<(i32 IntRegs:$a),
269 return isPositiveHalfWord(N);