1 //===- AMDKernelCodeTUtils.cpp --------------------------------------------===//
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 /// \file - utility functions to parse/print amd_kernel_code_t structure
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #include "AMDKernelCodeTUtils.h"
14 #include "AMDKernelCodeT.h"
15 #include "SIDefines.h"
16 #include "llvm/ADT/ArrayRef.h"
17 #include "llvm/ADT/StringMap.h"
18 #include "llvm/ADT/StringRef.h"
19 #include "llvm/MC/MCParser/MCAsmLexer.h"
20 #include "llvm/MC/MCParser/MCAsmParser.h"
21 #include "llvm/Support/raw_ostream.h"
22 
23 using namespace llvm;
24 
25 static ArrayRef<StringRef> get_amd_kernel_code_t_FldNames() {
26   static StringRef const Table[] = {
27     "", // not found placeholder
28 #define RECORD(name, altName, print, parse) #name
29 #include "AMDKernelCodeTInfo.h"
30 #undef RECORD
31   };
32   return makeArrayRef(Table);
33 }
34 
35 static ArrayRef<StringRef> get_amd_kernel_code_t_FldAltNames() {
36   static StringRef const Table[] = {
37     "", // not found placeholder
38 #define RECORD(name, altName, print, parse) #altName
39 #include "AMDKernelCodeTInfo.h"
40 #undef RECORD
41   };
42   return makeArrayRef(Table);
43 }
44 
45 static StringMap<int> createIndexMap(const ArrayRef<StringRef> &names,
46                                      const ArrayRef<StringRef> &altNames) {
47   StringMap<int> map;
48   assert(names.size() == altNames.size());
49   for (unsigned i = 0; i < names.size(); ++i) {
50     map.insert(std::make_pair(names[i], i));
51     map.insert(std::make_pair(altNames[i], i));
52   }
53   return map;
54 }
55 
56 static int get_amd_kernel_code_t_FieldIndex(StringRef name) {
57   static const auto map = createIndexMap(get_amd_kernel_code_t_FldNames(),
58                                          get_amd_kernel_code_t_FldAltNames());
59   return map.lookup(name) - 1; // returns -1 if not found
60 }
61 
62 static StringRef get_amd_kernel_code_t_FieldName(int index) {
63   return get_amd_kernel_code_t_FldNames()[index + 1];
64 }
65 
66 // Field printing
67 
68 static raw_ostream &printName(raw_ostream &OS, StringRef Name) {
69   return OS << Name << " = ";
70 }
71 
72 template <typename T, T amd_kernel_code_t::*ptr>
73 static void printField(StringRef Name, const amd_kernel_code_t &C,
74                        raw_ostream &OS) {
75   printName(OS, Name) << (int)(C.*ptr);
76 }
77 
78 template <typename T, T amd_kernel_code_t::*ptr, int shift, int width = 1>
79 static void printBitField(StringRef Name, const amd_kernel_code_t &c,
80                           raw_ostream &OS) {
81   const auto Mask = (static_cast<T>(1) << width) - 1;
82   printName(OS, Name) << (int)((c.*ptr >> shift) & Mask);
83 }
84 
85 using PrintFx = void(*)(StringRef, const amd_kernel_code_t &, raw_ostream &);
86 
87 static ArrayRef<PrintFx> getPrinterTable() {
88   static const PrintFx Table[] = {
89 #define RECORD(name, altName, print, parse) print
90 #include "AMDKernelCodeTInfo.h"
91 #undef RECORD
92   };
93   return makeArrayRef(Table);
94 }
95 
96 void llvm::printAmdKernelCodeField(const amd_kernel_code_t &C,
97                                    int FldIndex,
98                                    raw_ostream &OS) {
99   auto Printer = getPrinterTable()[FldIndex];
100   if (Printer)
101     Printer(get_amd_kernel_code_t_FieldName(FldIndex), C, OS);
102 }
103 
104 void llvm::dumpAmdKernelCode(const amd_kernel_code_t *C,
105                              raw_ostream &OS,
106                              const char *tab) {
107   const int Size = getPrinterTable().size();
108   for (int i = 0; i < Size; ++i) {
109     OS << tab;
110     printAmdKernelCodeField(*C, i, OS);
111     OS << '\n';
112   }
113 }
114 
115 // Field parsing
116 
117 static bool expectAbsExpression(MCAsmParser &MCParser, int64_t &Value, raw_ostream& Err) {
118 
119   if (MCParser.getLexer().isNot(AsmToken::Equal)) {
120     Err << "expected '='";
121     return false;
122   }
123   MCParser.getLexer().Lex();
124 
125   if (MCParser.parseAbsoluteExpression(Value)) {
126     Err << "integer absolute expression expected";
127     return false;
128   }
129   return true;
130 }
131 
132 template <typename T, T amd_kernel_code_t::*ptr>
133 static bool parseField(amd_kernel_code_t &C, MCAsmParser &MCParser,
134                        raw_ostream &Err) {
135   int64_t Value = 0;
136   if (!expectAbsExpression(MCParser, Value, Err))
137     return false;
138   C.*ptr = (T)Value;
139   return true;
140 }
141 
142 template <typename T, T amd_kernel_code_t::*ptr, int shift, int width = 1>
143 static bool parseBitField(amd_kernel_code_t &C, MCAsmParser &MCParser,
144                           raw_ostream &Err) {
145   int64_t Value = 0;
146   if (!expectAbsExpression(MCParser, Value, Err))
147     return false;
148   const uint64_t Mask = ((UINT64_C(1)  << width) - 1) << shift;
149   C.*ptr &= (T)~Mask;
150   C.*ptr |= (T)((Value << shift) & Mask);
151   return true;
152 }
153 
154 using ParseFx = bool(*)(amd_kernel_code_t &, MCAsmParser &MCParser,
155                         raw_ostream &Err);
156 
157 static ArrayRef<ParseFx> getParserTable() {
158   static const ParseFx Table[] = {
159 #define RECORD(name, altName, print, parse) parse
160 #include "AMDKernelCodeTInfo.h"
161 #undef RECORD
162   };
163   return makeArrayRef(Table);
164 }
165 
166 bool llvm::parseAmdKernelCodeField(StringRef ID,
167                                    MCAsmParser &MCParser,
168                                    amd_kernel_code_t &C,
169                                    raw_ostream &Err) {
170   const int Idx = get_amd_kernel_code_t_FieldIndex(ID);
171   if (Idx < 0) {
172     Err << "unexpected amd_kernel_code_t field name " << ID;
173     return false;
174   }
175   auto Parser = getParserTable()[Idx];
176   return Parser ? Parser(C, MCParser, Err) : false;
177 }
178