lib/Target/AMDGPU/Utils/AMDKernelCodeTUtils.cpp

   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 }