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 "SIDefines.h"
15 #include "llvm/ADT/ArrayRef.h"
16 #include "llvm/ADT/StringMap.h"
17 #include "llvm/ADT/StringRef.h"
18 #include "llvm/MC/MCParser/MCAsmLexer.h"
19 #include "llvm/MC/MCParser/MCAsmParser.h"
20 #include "llvm/Support/raw_ostream.h"
21 #include <cassert>
22 #include <cstdint>
23 #include <utility>
24 
25 using namespace llvm;
26 
27 static ArrayRef<StringRef> get_amd_kernel_code_t_FldNames() {
28   static StringRef const Table[] = {
29     "", // not found placeholder
30 #define RECORD(name, altName, print, parse) #name
31 #include "AMDKernelCodeTInfo.h"
32 #undef RECORD
33   };
34   return makeArrayRef(Table);
35 }
36 
37 static ArrayRef<StringRef> get_amd_kernel_code_t_FldAltNames() {
38   static StringRef const Table[] = {
39     "", // not found placeholder
40 #define RECORD(name, altName, print, parse) #altName
41 #include "AMDKernelCodeTInfo.h"
42 #undef RECORD
43   };
44   return makeArrayRef(Table);
45 }
46 
47 static StringMap<int> createIndexMap(const ArrayRef<StringRef> &names,
48                                      const ArrayRef<StringRef> &altNames) {
49   StringMap<int> map;
50   assert(names.size() == altNames.size());
51   for (unsigned i = 0; i < names.size(); ++i) {
52     map.insert(std::make_pair(names[i], i));
53     map.insert(std::make_pair(altNames[i], i));
54   }
55   return map;
56 }
57 
58 static int get_amd_kernel_code_t_FieldIndex(StringRef name) {
59   static const auto map = createIndexMap(get_amd_kernel_code_t_FldNames(),
60                                          get_amd_kernel_code_t_FldAltNames());
61   return map.lookup(name) - 1; // returns -1 if not found
62 }
63 
64 static StringRef get_amd_kernel_code_t_FieldName(int index) {
65   return get_amd_kernel_code_t_FldNames()[index + 1];
66 }
67 
68 // Field printing
69 
70 static raw_ostream &printName(raw_ostream &OS, StringRef Name) {
71   return OS << Name << " = ";
72 }
73 
74 template <typename T, T amd_kernel_code_t::*ptr>
75 static void printField(StringRef Name, const amd_kernel_code_t &C,
76                        raw_ostream &OS) {
77   printName(OS, Name) << (int)(C.*ptr);
78 }
79 
80 template <typename T, T amd_kernel_code_t::*ptr, int shift, int width = 1>
81 static void printBitField(StringRef Name, const amd_kernel_code_t &c,
82                           raw_ostream &OS) {
83   const auto Mask = (static_cast<T>(1) << width) - 1;
84   printName(OS, Name) << (int)((c.*ptr >> shift) & Mask);
85 }
86 
87 using PrintFx = void(*)(StringRef, const amd_kernel_code_t &, raw_ostream &);
88 
89 static ArrayRef<PrintFx> getPrinterTable() {
90   static const PrintFx Table[] = {
91 #define RECORD(name, altName, print, parse) print
92 #include "AMDKernelCodeTInfo.h"
93 #undef RECORD
94   };
95   return makeArrayRef(Table);
96 }
97 
98 void llvm::printAmdKernelCodeField(const amd_kernel_code_t &C,
99                                    int FldIndex,
100                                    raw_ostream &OS) {
101   auto Printer = getPrinterTable()[FldIndex];
102   if (Printer)
103     Printer(get_amd_kernel_code_t_FieldName(FldIndex), C, OS);
104 }
105 
106 void llvm::dumpAmdKernelCode(const amd_kernel_code_t *C,
107                              raw_ostream &OS,
108                              const char *tab) {
109   const int Size = getPrinterTable().size();
110   for (int i = 0; i < Size; ++i) {
111     OS << tab;
112     printAmdKernelCodeField(*C, i, OS);
113     OS << '\n';
114   }
115 }
116 
117 // Field parsing
118 
119 static bool expectAbsExpression(MCAsmParser &MCParser, int64_t &Value, raw_ostream& Err) {
120 
121   if (MCParser.getLexer().isNot(AsmToken::Equal)) {
122     Err << "expected '='";
123     return false;
124   }
125   MCParser.getLexer().Lex();
126 
127   if (MCParser.parseAbsoluteExpression(Value)) {
128     Err << "integer absolute expression expected";
129     return false;
130   }
131   return true;
132 }
133 
134 template <typename T, T amd_kernel_code_t::*ptr>
135 static bool parseField(amd_kernel_code_t &C, MCAsmParser &MCParser,
136                        raw_ostream &Err) {
137   int64_t Value = 0;
138   if (!expectAbsExpression(MCParser, Value, Err))
139     return false;
140   C.*ptr = (T)Value;
141   return true;
142 }
143 
144 template <typename T, T amd_kernel_code_t::*ptr, int shift, int width = 1>
145 static bool parseBitField(amd_kernel_code_t &C, MCAsmParser &MCParser,
146                           raw_ostream &Err) {
147   int64_t Value = 0;
148   if (!expectAbsExpression(MCParser, Value, Err))
149     return false;
150   const uint64_t Mask = ((UINT64_C(1)  << width) - 1) << shift;
151   C.*ptr &= (T)~Mask;
152   C.*ptr |= (T)((Value << shift) & Mask);
153   return true;
154 }
155 
156 using ParseFx = bool(*)(amd_kernel_code_t &, MCAsmParser &MCParser,
157                         raw_ostream &Err);
158 
159 static ArrayRef<ParseFx> getParserTable() {
160   static const ParseFx Table[] = {
161 #define RECORD(name, altName, print, parse) parse
162 #include "AMDKernelCodeTInfo.h"
163 #undef RECORD
164   };
165   return makeArrayRef(Table);
166 }
167 
168 bool llvm::parseAmdKernelCodeField(StringRef ID,
169                                    MCAsmParser &MCParser,
170                                    amd_kernel_code_t &C,
171                                    raw_ostream &Err) {
172   const int Idx = get_amd_kernel_code_t_FieldIndex(ID);
173   if (Idx < 0) {
174     Err << "unexpected amd_kernel_code_t field name " << ID;
175     return false;
176   }
177   auto Parser = getParserTable()[Idx];
178   return Parser ? Parser(C, MCParser, Err) : false;
179 }
180