1//===-- CSKYRegisterInfo.td - CSKY Register defs -----------*- tablegen -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9//===----------------------------------------------------------------------===//
10//  Declarations that describe the CSKY registers.
11//===----------------------------------------------------------------------===//
12
13let Namespace = "CSKY" in {
14  class CSKYReg<bits<6> Enc, string n, list<string> alt = []> : Register<n> {
15    let HWEncoding{5 - 0} = Enc;
16    let AltNames = alt;
17  }
18
19  class CSKYFReg32<bits<5> Enc, string n, list<string> alt = []> : Register<n> {
20    let HWEncoding{4 - 0} = Enc;
21    let AltNames = alt;
22  }
23
24  // Because CSKYFReg64 register have AsmName and AltNames that alias with their
25  // 32-bit sub-register, CSKYAsmParser will need to coerce a register number
26  // from a CSKYFReg32 to the equivalent CSKYFReg64 when appropriate.
27  def sub32_0 : SubRegIndex<32, 0>;
28  def sub32_32 : SubRegIndex<32, 32>;
29  def sub64_0 : SubRegIndex<64, 0>;
30  def sub64_64 : SubRegIndex<64,64>;
31
32  class CSKYFReg64<CSKYFReg32 subreg> : Register<""> {
33    let HWEncoding{4 - 0} = subreg.HWEncoding{4 - 0};
34    let SubRegs = [subreg];
35    let SubRegIndices = [sub32_0];
36    let AsmName = subreg.AsmName;
37    let AltNames = subreg.AltNames;
38  }
39
40  class CSKYFReg128<CSKYFReg64 subreg> : Register<""> {
41    let HWEncoding{4 - 0} = subreg.HWEncoding{4 - 0};
42    let SubRegs = [subreg];
43    let SubRegIndices = [sub64_0];
44    let AsmName = subreg.AsmName;
45    let AltNames = subreg.AltNames;
46  }
47
48  def ABIRegAltName : RegAltNameIndex;
49} // Namespace = "CSKY"
50
51let RegAltNameIndices = [ABIRegAltName] in {
52  def R0 : CSKYReg<0, "r0", ["a0"]>, DwarfRegNum<[0]>;
53  def R1 : CSKYReg<1, "r1", ["a1"]>, DwarfRegNum<[1]>;
54  def R2 : CSKYReg<2, "r2", ["a2"]>, DwarfRegNum<[2]>;
55  def R3 : CSKYReg<3, "r3", ["a3"]>, DwarfRegNum<[3]>;
56  def R4 : CSKYReg<4, "r4", ["l0"]>, DwarfRegNum<[4]>;
57  def R5 : CSKYReg<5, "r5", ["l1"]>, DwarfRegNum<[5]>;
58  def R6 : CSKYReg<6, "r6", ["l2"]>, DwarfRegNum<[6]>;
59  def R7 : CSKYReg<7, "r7", ["l3"]>, DwarfRegNum<[7]>;
60  def R8 : CSKYReg<8, "r8", ["l4"]>, DwarfRegNum<[8]>;
61  def R9 : CSKYReg<9, "r9", ["l5"]>, DwarfRegNum<[9]>;
62  def R10 : CSKYReg<10, "r10", ["l6"]>, DwarfRegNum<[10]>;
63  def R11 : CSKYReg<11, "r11", ["l7"]>, DwarfRegNum<[11]>;
64  def R12 : CSKYReg<12, "r12", ["t0"]>, DwarfRegNum<[12]>;
65  def R13 : CSKYReg<13, "r13", ["t1"]>, DwarfRegNum<[13]>;
66  def R14 : CSKYReg<14, "r14", ["sp"]>, DwarfRegNum<[14]>;
67  def R15 : CSKYReg<15, "r15", ["lr"]>, DwarfRegNum<[15]>;
68  def R16 : CSKYReg<16, "r16", ["l8"]>, DwarfRegNum<[16]>;
69  def R17 : CSKYReg<17, "r17", ["l9"]>, DwarfRegNum<[17]>;
70  def R18 : CSKYReg<18, "r18", ["t2"]>, DwarfRegNum<[18]>;
71  def R19 : CSKYReg<19, "r19", ["t3"]>, DwarfRegNum<[19]>;
72  def R20 : CSKYReg<20, "r20", ["t4"]>, DwarfRegNum<[20]>;
73  def R21 : CSKYReg<21, "r21", ["t5"]>, DwarfRegNum<[21]>;
74  def R22 : CSKYReg<22, "r22", ["t6"]>, DwarfRegNum<[22]>;
75  def R23 : CSKYReg<23, "r23", ["t7"]>, DwarfRegNum<[23]>;
76  def R24 : CSKYReg<24, "r24", ["t8"]>, DwarfRegNum<[24]>;
77  def R25 : CSKYReg<25, "r25", ["t9"]>, DwarfRegNum<[25]>;
78  def R26 : CSKYReg<26, "r26", ["r26"]>, DwarfRegNum<[26]>;
79  def R27 : CSKYReg<27, "r27", ["r27"]>, DwarfRegNum<[27]>;
80  def R28 : CSKYReg<28, "r28", ["rgb"]>, DwarfRegNum<[28]>;
81  def R29 : CSKYReg<29, "r29", ["rtb"]>, DwarfRegNum<[29]>;
82  def R30 : CSKYReg<30, "r30", ["svbr"]>, DwarfRegNum<[30]>;
83  def R31 : CSKYReg<31, "r31", ["tls"]>, DwarfRegNum<[31]>;
84
85  // Faked for GPRTuple
86  def R32 : CSKYReg<32, "r32", ["r32"]>, DwarfRegNum<[32]>;
87
88  def C : CSKYReg<33, "cr0", ["psr"]>;
89
90}
91
92def GPRTuple : RegisterTuples<
93          [sub32_0, sub32_32],
94          [(add (sequence "R%u", 0, 31)), (add (sequence "R%u", 1, 32))],
95          [ "r0",  "r1",  "r2",  "r3",  "r4",  "r5",  "r6",  "r7",
96            "r8",  "r9",  "r10", "r11", "r12", "r13", "r14", "r15",
97            "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
98            "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31"
99          ]>;
100
101// Floating point registers
102let RegAltNameIndices = [ABIRegAltName] in {
103  def F0_32 : CSKYFReg32<0, "fr0", ["vr0"]>, DwarfRegNum<[32]>;
104  def F1_32 : CSKYFReg32<1, "fr1", ["vr1"]>, DwarfRegNum<[33]>;
105  def F2_32 : CSKYFReg32<2, "fr2", ["vr2"]>, DwarfRegNum<[34]>;
106  def F3_32 : CSKYFReg32<3, "fr3", ["vr3"]>, DwarfRegNum<[35]>;
107  def F4_32 : CSKYFReg32<4, "fr4", ["vr4"]>, DwarfRegNum<[36]>;
108  def F5_32 : CSKYFReg32<5, "fr5", ["vr5"]>, DwarfRegNum<[37]>;
109  def F6_32 : CSKYFReg32<6, "fr6", ["vr6"]>, DwarfRegNum<[38]>;
110  def F7_32 : CSKYFReg32<7, "fr7", ["vr7"]>, DwarfRegNum<[39]>;
111  def F8_32 : CSKYFReg32<8, "fr8", ["vr8"]>, DwarfRegNum<[40]>;
112  def F9_32 : CSKYFReg32<9, "fr9", ["vr9"]>, DwarfRegNum<[41]>;
113  def F10_32 : CSKYFReg32<10, "fr10", ["vr10"]>, DwarfRegNum<[42]>;
114  def F11_32 : CSKYFReg32<11, "fr11", ["vr11"]>, DwarfRegNum<[43]>;
115  def F12_32 : CSKYFReg32<12, "fr12", ["vr12"]>, DwarfRegNum<[44]>;
116  def F13_32 : CSKYFReg32<13, "fr13", ["vr13"]>, DwarfRegNum<[45]>;
117  def F14_32 : CSKYFReg32<14, "fr14", ["vr14"]>, DwarfRegNum<[46]>;
118  def F15_32 : CSKYFReg32<15, "fr15", ["vr15"]>, DwarfRegNum<[47]>;
119  def F16_32 : CSKYFReg32<16, "fr16", ["vr16"]>, DwarfRegNum<[48]>;
120  def F17_32 : CSKYFReg32<17, "fr17", ["vr17"]>, DwarfRegNum<[49]>;
121  def F18_32 : CSKYFReg32<18, "fr18", ["vr18"]>, DwarfRegNum<[50]>;
122  def F19_32 : CSKYFReg32<19, "fr19", ["vr19"]>, DwarfRegNum<[51]>;
123  def F20_32 : CSKYFReg32<20, "fr20", ["vr20"]>, DwarfRegNum<[52]>;
124  def F21_32 : CSKYFReg32<21, "fr21", ["vr21"]>, DwarfRegNum<[53]>;
125  def F22_32 : CSKYFReg32<22, "fr22", ["vr22"]>, DwarfRegNum<[54]>;
126  def F23_32 : CSKYFReg32<23, "fr23", ["vr23"]>, DwarfRegNum<[55]>;
127  def F24_32 : CSKYFReg32<24, "fr24", ["vr24"]>, DwarfRegNum<[56]>;
128  def F25_32 : CSKYFReg32<25, "fr25", ["vr25"]>, DwarfRegNum<[57]>;
129  def F26_32 : CSKYFReg32<26, "fr26", ["vr26"]>, DwarfRegNum<[58]>;
130  def F27_32 : CSKYFReg32<27, "fr27", ["vr27"]>, DwarfRegNum<[59]>;
131  def F28_32 : CSKYFReg32<28, "fr28", ["vr28"]>, DwarfRegNum<[60]>;
132  def F29_32 : CSKYFReg32<29, "fr29", ["vr29"]>, DwarfRegNum<[61]>;
133  def F30_32 : CSKYFReg32<30, "fr30", ["vr30"]>, DwarfRegNum<[62]>;
134  def F31_32 : CSKYFReg32<31, "fr31", ["vr31"]>, DwarfRegNum<[63]>;
135
136  foreach Index = 0 - 31 in {
137    def F#Index#_64 : CSKYFReg64<!cast<CSKYFReg32>("F"#Index#"_32")>,
138                      DwarfRegNum<[!add(Index, 32)]>;
139
140    def F#Index#_128 : CSKYFReg128<!cast<CSKYFReg64>("F"#Index#"_64")>,
141                       DwarfRegNum<[!add(Index, 32)]>;
142  }
143}
144
145
146//===----------------------------------------------------------------------===//
147// Declarations that describe the CSKY register class.
148//===----------------------------------------------------------------------===//
149
150// The order of registers represents the preferred allocation sequence.
151// Registers are listed in the order caller-save, callee-save, specials.
152def GPR : RegisterClass<"CSKY", [i32], 32,
153                        (add (sequence "R%u", 0, 3), (sequence "R%u", 12, 13),
154                             (sequence "R%u", 18, 25), R15, (sequence "R%u", 4, 11),
155                             (sequence "R%u", 16, 17), (sequence "R%u", 26, 27), R28,
156                             (sequence "R%u", 29, 30), R14, R31)> {
157  let Size = 32;
158}
159
160// Register class for R0 - R15.
161// Some 16-bit integer instructions can only access R0 - R15.
162def sGPR : RegisterClass<"CSKY", [i32], 32,
163                        (add (sequence "R%u", 0, 3), (sequence "R%u", 12, 13), R15,
164                        (sequence "R%u", 4, 11), R14)> {
165  let Size = 32;
166}
167
168// Register class for R0 - R7.
169// Some 16-bit integer instructions can only access R0 - R7.
170def mGPR : RegisterClass<"CSKY", [i32], 32,
171                        (add (sequence "R%u", 0, 7))> {
172  let Size = 32;
173}
174
175// Register class for SP only.
176def GPRSP : RegisterClass<"CSKY", [i32], 32, (add R14)> {
177  let Size = 32;
178}
179
180def GPRPair : RegisterClass<"CSKY", [untyped], 32, (add GPRTuple)> {
181  let Size = 64;
182}
183
184def CARRY : RegisterClass<"CSKY", [i32], 32, (add C)> {
185  let Size = 32;
186  let CopyCost = -1;
187}
188
189// The order of registers represents the preferred allocation sequence.
190// Registers are listed in the order caller-save, callee-save, specials.
191def FPR32 : RegisterClass<"CSKY", [f32], 32,
192                         (add (sequence "F%u_32", 0, 31))>;
193def sFPR32 : RegisterClass<"CSKY", [f32], 32,
194                         (add (sequence "F%u_32", 0, 15))>;
195
196def FPR64 : RegisterClass<"CSKY", [f64], 32,
197                         (add (sequence "F%u_64", 0, 31))>;
198def sFPR64 : RegisterClass<"CSKY", [f64], 32,
199                         (add (sequence "F%u_64", 0, 15))>;
200
201def sFPR64_V : RegisterClass<"CSKY", [v2f32], 32, (add sFPR64)>;
202
203def FPR128 : RegisterClass<"CSKY",
204             [v16i8, v8i16, v4i32, v2i64, v4f32, v2f64, v8f16], 128,
205             (add (sequence "F%u_128", 0, 31))>;
206def sFPR128 : RegisterClass<"CSKY",
207              [v16i8, v8i16, v4i32, v2i64, v4f32, v2f64, v8f16], 128,
208              (add (sequence "F%u_128", 0, 15))>;
209