1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
|
//===-- SIRegisterInfo.td - SI Register defs ---------------*- tablegen -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//===----------------------------------------------------------------------===//
// Declarations that describe the SI registers
//===----------------------------------------------------------------------===//
class SIReg <string n, bits<16> encoding = 0> : Register<n> {
let Namespace = "AMDGPU";
let HWEncoding = encoding;
}
// Special Registers
def VCC_LO : SIReg<"vcc_lo", 106>;
def VCC_HI : SIReg<"vcc_hi", 107>;
// VCC for 64-bit instructions
def VCC : RegisterWithSubRegs<"vcc", [VCC_LO, VCC_HI]> {
let Namespace = "AMDGPU";
let SubRegIndices = [sub0, sub1];
let HWEncoding = 106;
}
def EXEC_LO : SIReg<"exec_lo", 126>;
def EXEC_HI : SIReg<"exec_hi", 127>;
def EXEC : RegisterWithSubRegs<"EXEC", [EXEC_LO, EXEC_HI]> {
let Namespace = "AMDGPU";
let SubRegIndices = [sub0, sub1];
let HWEncoding = 126;
}
def SCC : SIReg<"scc", 253>;
def M0 : SIReg <"m0", 124>;
def FLAT_SCR_LO : SIReg<"flat_scr_lo", 104>; // Offset in units of 256-bytes.
def FLAT_SCR_HI : SIReg<"flat_scr_hi", 105>; // Size is the per-thread scratch size, in bytes.
// Pair to indicate location of scratch space for flat accesses.
def FLAT_SCR : RegisterWithSubRegs <"flat_scr", [FLAT_SCR_LO, FLAT_SCR_HI]> {
let Namespace = "AMDGPU";
let SubRegIndices = [sub0, sub1];
let HWEncoding = 104;
}
// SGPR registers
foreach Index = 0-101 in {
def SGPR#Index : SIReg <"SGPR"#Index, Index>;
}
// VGPR registers
foreach Index = 0-255 in {
def VGPR#Index : SIReg <"VGPR"#Index, Index> {
let HWEncoding{8} = 1;
}
}
//===----------------------------------------------------------------------===//
// Groupings using register classes and tuples
//===----------------------------------------------------------------------===//
// SGPR 32-bit registers
def SGPR_32 : RegisterClass<"AMDGPU", [f32, i32], 32,
(add (sequence "SGPR%u", 0, 101))>;
// SGPR 64-bit registers
def SGPR_64Regs : RegisterTuples<[sub0, sub1],
[(add (decimate (trunc SGPR_32, 101), 2)),
(add (decimate (shl SGPR_32, 1), 2))]>;
// SGPR 128-bit registers
def SGPR_128 : RegisterTuples<[sub0, sub1, sub2, sub3],
[(add (decimate (trunc SGPR_32, 99), 4)),
(add (decimate (shl SGPR_32, 1), 4)),
(add (decimate (shl SGPR_32, 2), 4)),
(add (decimate (shl SGPR_32, 3), 4))]>;
// SGPR 256-bit registers
def SGPR_256 : RegisterTuples<[sub0, sub1, sub2, sub3, sub4, sub5, sub6, sub7],
[(add (decimate (trunc SGPR_32, 95), 4)),
(add (decimate (shl SGPR_32, 1), 4)),
(add (decimate (shl SGPR_32, 2), 4)),
(add (decimate (shl SGPR_32, 3), 4)),
(add (decimate (shl SGPR_32, 4), 4)),
(add (decimate (shl SGPR_32, 5), 4)),
(add (decimate (shl SGPR_32, 6), 4)),
(add (decimate (shl SGPR_32, 7), 4))]>;
// SGPR 512-bit registers
def SGPR_512 : RegisterTuples<[sub0, sub1, sub2, sub3, sub4, sub5, sub6, sub7,
sub8, sub9, sub10, sub11, sub12, sub13, sub14, sub15],
[(add (decimate (trunc SGPR_32, 87), 4)),
(add (decimate (shl SGPR_32, 1), 4)),
(add (decimate (shl SGPR_32, 2), 4)),
(add (decimate (shl SGPR_32, 3), 4)),
(add (decimate (shl SGPR_32, 4), 4)),
(add (decimate (shl SGPR_32, 5), 4)),
(add (decimate (shl SGPR_32, 6), 4)),
(add (decimate (shl SGPR_32, 7), 4)),
(add (decimate (shl SGPR_32, 8), 4)),
(add (decimate (shl SGPR_32, 9), 4)),
(add (decimate (shl SGPR_32, 10), 4)),
(add (decimate (shl SGPR_32, 11), 4)),
(add (decimate (shl SGPR_32, 12), 4)),
(add (decimate (shl SGPR_32, 13), 4)),
(add (decimate (shl SGPR_32, 14), 4)),
(add (decimate (shl SGPR_32, 15), 4))]>;
// VGPR 32-bit registers
def VGPR_32 : RegisterClass<"AMDGPU", [f32, i32], 32,
(add (sequence "VGPR%u", 0, 255))>;
// VGPR 64-bit registers
def VGPR_64 : RegisterTuples<[sub0, sub1],
[(add (trunc VGPR_32, 255)),
(add (shl VGPR_32, 1))]>;
// VGPR 96-bit registers
def VGPR_96 : RegisterTuples<[sub0, sub1, sub2],
[(add (trunc VGPR_32, 254)),
(add (shl VGPR_32, 1)),
(add (shl VGPR_32, 2))]>;
// VGPR 128-bit registers
def VGPR_128 : RegisterTuples<[sub0, sub1, sub2, sub3],
[(add (trunc VGPR_32, 253)),
(add (shl VGPR_32, 1)),
(add (shl VGPR_32, 2)),
(add (shl VGPR_32, 3))]>;
// VGPR 256-bit registers
def VGPR_256 : RegisterTuples<[sub0, sub1, sub2, sub3, sub4, sub5, sub6, sub7],
[(add (trunc VGPR_32, 249)),
(add (shl VGPR_32, 1)),
(add (shl VGPR_32, 2)),
(add (shl VGPR_32, 3)),
(add (shl VGPR_32, 4)),
(add (shl VGPR_32, 5)),
(add (shl VGPR_32, 6)),
(add (shl VGPR_32, 7))]>;
// VGPR 512-bit registers
def VGPR_512 : RegisterTuples<[sub0, sub1, sub2, sub3, sub4, sub5, sub6, sub7,
sub8, sub9, sub10, sub11, sub12, sub13, sub14, sub15],
[(add (trunc VGPR_32, 241)),
(add (shl VGPR_32, 1)),
(add (shl VGPR_32, 2)),
(add (shl VGPR_32, 3)),
(add (shl VGPR_32, 4)),
(add (shl VGPR_32, 5)),
(add (shl VGPR_32, 6)),
(add (shl VGPR_32, 7)),
(add (shl VGPR_32, 8)),
(add (shl VGPR_32, 9)),
(add (shl VGPR_32, 10)),
(add (shl VGPR_32, 11)),
(add (shl VGPR_32, 12)),
(add (shl VGPR_32, 13)),
(add (shl VGPR_32, 14)),
(add (shl VGPR_32, 15))]>;
//===----------------------------------------------------------------------===//
// Register classes used as source and destination
//===----------------------------------------------------------------------===//
// Special register classes for predicates and the M0 register
def SCCReg : RegisterClass<"AMDGPU", [i32, i1], 32, (add SCC)> {
let CopyCost = -1; // Theoretically it is possible to read from SCC,
// but it should never be necessary.
}
def VCCReg : RegisterClass<"AMDGPU", [i64, i1], 64, (add VCC)>;
def EXECReg : RegisterClass<"AMDGPU", [i64, i1], 64, (add EXEC)>;
def M0Reg : RegisterClass<"AMDGPU", [i32], 32, (add M0)>;
// Register class for all scalar registers (SGPRs + Special Registers)
def SReg_32 : RegisterClass<"AMDGPU", [f32, i32], 32,
(add SGPR_32, M0Reg, VCC_LO, VCC_HI, EXEC_LO, EXEC_HI, FLAT_SCR_LO, FLAT_SCR_HI)
>;
def SGPR_64 : RegisterClass<"AMDGPU", [v2i32, i64, f64], 64, (add SGPR_64Regs)>;
def SReg_64 : RegisterClass<"AMDGPU", [v2i32, i64, f64, i1], 64,
(add SGPR_64, VCCReg, EXECReg, FLAT_SCR)
>;
def SReg_128 : RegisterClass<"AMDGPU", [v4i32, v16i8], 128, (add SGPR_128)>;
def SReg_256 : RegisterClass<"AMDGPU", [v32i8, v8i32, v8f32], 256, (add SGPR_256)>;
def SReg_512 : RegisterClass<"AMDGPU", [v64i8, v16i32], 512, (add SGPR_512)>;
// Register class for all vector registers (VGPRs + Interploation Registers)
def VReg_64 : RegisterClass<"AMDGPU", [i64, f64, v2i32, v2f32], 64, (add VGPR_64)>;
def VReg_96 : RegisterClass<"AMDGPU", [untyped], 96, (add VGPR_96)> {
let Size = 96;
}
def VReg_128 : RegisterClass<"AMDGPU", [v4i32, v4f32], 128, (add VGPR_128)>;
def VReg_256 : RegisterClass<"AMDGPU", [v32i8, v8i32, v8f32], 256, (add VGPR_256)>;
def VReg_512 : RegisterClass<"AMDGPU", [v16i32, v16f32], 512, (add VGPR_512)>;
def VReg_1 : RegisterClass<"AMDGPU", [i1], 32, (add VGPR_32)> {
let Size = 32;
}
class RegImmOperand <RegisterClass rc> : RegisterOperand<rc> {
let OperandNamespace = "AMDGPU";
let OperandType = "OPERAND_REG_IMM32";
}
class RegInlineOperand <RegisterClass rc> : RegisterOperand<rc> {
let OperandNamespace = "AMDGPU";
let OperandType = "OPERAND_REG_INLINE_C";
}
//===----------------------------------------------------------------------===//
// SSrc_* Operands with an SGPR or a 32-bit immediate
//===----------------------------------------------------------------------===//
def SSrc_32 : RegImmOperand<SReg_32>;
def SSrc_64 : RegImmOperand<SReg_64>;
//===----------------------------------------------------------------------===//
// SCSrc_* Operands with an SGPR or a inline constant
//===----------------------------------------------------------------------===//
def SCSrc_32 : RegInlineOperand<SReg_32>;
//===----------------------------------------------------------------------===//
// VSrc_* Operands with an SGPR, VGPR or a 32-bit immediate
//===----------------------------------------------------------------------===//
def VS_32 : RegisterClass<"AMDGPU", [i32, f32], 32, (add VGPR_32, SReg_32)>;
def VS_64 : RegisterClass<"AMDGPU", [i64, f64], 64, (add VReg_64, SReg_64)>;
def VSrc_32 : RegImmOperand<VS_32>;
def VSrc_64 : RegImmOperand<VS_64>;
//===----------------------------------------------------------------------===//
// VCSrc_* Operands with an SGPR, VGPR or an inline constant
//===----------------------------------------------------------------------===//
def VCSrc_32 : RegInlineOperand<VS_32>;
def VCSrc_64 : RegInlineOperand<VS_64>;
|
