Moving Cost Tables up to share with other targets

[oota-llvm.git] / include / llvm / Target / CostTable.h

diff --git a/include/llvm/Target/CostTable.h b/include/llvm/Target/CostTable.h
new file mode 100644 (file)
index 0000000..a974b56
--- /dev/null
+++ b/include/llvm/Target/CostTable.h
@@ -0,0 +1,64 @@
+//===-- CostTable.h - Instruction Cost Table handling -----------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// \brief Cost tables and simple lookup functions
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_TARGET_COSTTABLE_H_
+#define LLVM_TARGET_COSTTABLE_H_
+
+namespace llvm {
+
+/// Cost Table Entry
+template <class TypeTy>
+struct CostTblEntry {
+  int ISD;
+  TypeTy Type;
+  unsigned Cost;
+};
+
+/// Find in cost table, TypeTy must be comparable by ==
+template <class TypeTy>
+int CostTableLookup(const CostTblEntry<TypeTy> *Tbl,
+                    unsigned len, int ISD, TypeTy Ty) {
+  for (unsigned int i = 0; i < len; ++i)
+    if (Tbl[i].ISD == ISD && Tbl[i].Type == Ty)
+      return i;
+
+  // Could not find an entry.
+  return -1;
+}
+
+/// Type Conversion Cost Table
+template <class TypeTy>
+struct TypeConversionCostTblEntry {
+  int ISD;
+  TypeTy Dst;
+  TypeTy Src;
+  unsigned Cost;
+};
+
+/// Find in type conversion cost table, TypeTy must be comparable by ==
+template <class TypeTy>
+int ConvertCostTableLookup(const TypeConversionCostTblEntry<TypeTy> *Tbl,
+                           unsigned len, int ISD, TypeTy Dst, TypeTy Src) {
+  for (unsigned int i = 0; i < len; ++i)
+    if (Tbl[i].ISD == ISD && Tbl[i].Src == Src && Tbl[i].Dst == Dst)
+      return i;
+
+  // Could not find an entry.
+  return -1;
+}
+
+} // namespace llvm
+
+
+#endif /* LLVM_TARGET_COSTTABLE_H_ */