[AMDGPU] table-driven parser/printer for amd_kernel_code_t structure fields

Differential Revision: http://reviews.llvm.org/D17150

llvm-svn: 262804

1 files changed, 165 insertions, 0 deletions

diff --git a/llvm/lib/Target/AMDGPU/Utils/AMDKernelCodeTUtils.cpp b/llvm/lib/Target/AMDGPU/Utils/AMDKernelCodeTUtils.cpp
new file mode 100644
index 0000000..6a416b9
--- /dev/null
+++ b/llvm/lib/Target/AMDGPU/Utils/AMDKernelCodeTUtils.cpp
@@ -0,0 +1,165 @@
+//===--------------------AMDKernelCodeTUtils.cpp --------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+//===----------------------------------------------------------------------===//
+//
+/// \file - utility functions to parse/print amd_kernel_code_t structure
+//
+//===----------------------------------------------------------------------===//
+
+#include "AMDKernelCodeTUtils.h"
+#include "SIDefines.h"
+#include <llvm/MC/MCParser/MCAsmLexer.h>
+#include <llvm/Support/raw_ostream.h>
+
+using namespace llvm;
+
+static ArrayRef<StringRef> get_amd_kernel_code_t_FldNames() {
+  static StringRef const Table[] = {
+    "", // not found placeholder
+#define RECORD(name, print, parse) #name
+#include "AMDKernelCodeTInfo.h"
+#undef RECORD
+  };
+  return makeArrayRef(Table);
+}
+
+static StringMap<int> createIndexMap(const ArrayRef<StringRef>& a) {
+  StringMap<int> map;
+  for (auto Name : a)
+    map.insert(std::make_pair(Name, map.size()));
+  return std::move(map);
+}
+
+static int get_amd_kernel_code_t_FieldIndex(StringRef name) {
+  static const auto map = createIndexMap(get_amd_kernel_code_t_FldNames());
+  return map.lookup(name) - 1; // returns -1 if not found
+}
+
+static StringRef get_amd_kernel_code_t_FieldName(int index) {
+  return get_amd_kernel_code_t_FldNames()[index + 1];
+}
+
+
+// Field printing
+
+raw_ostream& printName(raw_ostream& OS, StringRef Name) {
+  return OS << Name << " = ";
+}
+
+template <typename T, T amd_kernel_code_t::*ptr>
+void printField(StringRef Name,
+                const amd_kernel_code_t& C,
+                raw_ostream& OS) {
+  printName(OS, Name) << (int)(C.*ptr);
+}
+
+template <typename T, T amd_kernel_code_t::*ptr, int shift, int width=1>
+void printBitField(StringRef Name,
+                   const amd_kernel_code_t& c,
+                   raw_ostream& OS) {
+  const auto Mask = (static_cast<T>(1) << width) - 1;
+  printName(OS, Name) << (int)((c.*ptr >> shift) & Mask);
+}
+
+typedef void(*PrintFx)(StringRef,
+                       const amd_kernel_code_t&,
+                       raw_ostream&);
+
+static ArrayRef<PrintFx> getPrinterTable() {
+  static const PrintFx Table[] = {
+#define RECORD(name, print, parse) print
+#include "AMDKernelCodeTInfo.h"
+#undef RECORD
+  };
+  return makeArrayRef(Table);
+}
+
+void llvm::printAmdKernelCodeField(const amd_kernel_code_t& C,
+                                   int FldIndex,
+                                   raw_ostream& OS) {
+  auto Printer = getPrinterTable()[FldIndex];
+  if (Printer)
+    Printer(get_amd_kernel_code_t_FieldName(FldIndex), C, OS);
+}
+
+void llvm::dumpAmdKernelCode(const amd_kernel_code_t* C,
+                             raw_ostream& OS,
+                             const char* tab) {
+  const int Size = getPrinterTable().size();
+  for (int i = 0; i < Size; ++i) {
+    OS << tab;
+    printAmdKernelCodeField(*C, i, OS);
+    OS << '\n';
+  }
+}
+
+
+// Field parsing
+
+static bool expectEqualInt(MCAsmLexer& Lexer, raw_ostream& Err) {
+  if (Lexer.isNot(AsmToken::Equal)) {
+    Err << "expected '='";
+    return false;
+  }
+  Lexer.Lex();
+  if (Lexer.isNot(AsmToken::Integer)) {
+    Err << "integer literal expected";
+    return false;
+  }
+  return true;
+}
+
+template <typename T, T amd_kernel_code_t::*ptr>
+bool parseField(amd_kernel_code_t& C,
+                MCAsmLexer& Lexer,
+                raw_ostream& Err) {
+  if (!expectEqualInt(Lexer, Err))
+    return false;
+  C.*ptr = (T)Lexer.getTok().getIntVal();
+  return true;
+}
+
+template <typename T, T amd_kernel_code_t::*ptr, int shift, int width = 1>
+bool parseBitField(amd_kernel_code_t& C,
+                   MCAsmLexer& Lexer,
+                   raw_ostream& Err) {
+  if (!expectEqualInt(Lexer, Err))
+    return false;
+  const uint64_t Mask = ((UINT64_C(1)  << width) - 1) << shift;
+  C.*ptr &= (T)~Mask;
+  C.*ptr |= (T)((Lexer.getTok().getIntVal() << shift) & Mask);
+  return true;
+}
+
+typedef bool(*ParseFx)(amd_kernel_code_t&,
+                       MCAsmLexer& Lexer,
+                       raw_ostream& Err);
+
+static ArrayRef<ParseFx> getParserTable() {
+  static const ParseFx Table[] = {
+#define RECORD(name, print, parse) parse
+#include "AMDKernelCodeTInfo.h"
+#undef RECORD
+  };
+  return makeArrayRef(Table);
+}
+
+bool llvm::parseAmdKernelCodeField(StringRef ID,
+                                   MCAsmLexer& Lexer,
+                                   amd_kernel_code_t& C,
+                                   raw_ostream& Err) {
+  const int Idx = get_amd_kernel_code_t_FieldIndex(ID);
+  if (Idx < 0) {
+    Err << "unexpected amd_kernel_code_t field name " << ID;
+    return false;
+  }
+  auto Parser = getParserTable()[Idx];
+  return Parser ? Parser(C, Lexer, Err) : false;
+}