From bed9dc423ceadd08500869cf03e4c0819145d48b Mon Sep 17 00:00:00 2001
From: Dale Johannesen <dalej@apple.com>
Date: Thu, 6 Sep 2007 18:13:44 +0000
Subject: Next round of APFloat changes. Use APFloat in UpgradeParser and
 AsmParser. Change all references to ConstantFP to use the APFloat interface
 rather than double.  Remove the ConstantFP double interfaces. Use APFloat
 functions for constant folding arithmetic and comparisons. (There are still
 way too many places APFloat is just a wrapper around host float/double, but
 we're getting there.)

llvm-svn: 41747
---
 llvm/tools/llvm2cpp/CppWriter.cpp | 27 ++++++++++++++++++---------
 1 file changed, 18 insertions(+), 9 deletions(-)

(limited to 'llvm/tools/llvm2cpp/CppWriter.cpp')

diff --git a/llvm/tools/llvm2cpp/CppWriter.cpp b/llvm/tools/llvm2cpp/CppWriter.cpp
index 0b7b0eea002..1551dc3be78 100644
--- a/llvm/tools/llvm2cpp/CppWriter.cpp
+++ b/llvm/tools/llvm2cpp/CppWriter.cpp
@@ -209,25 +209,30 @@ CppWriter::error(const std::string& msg) {
 // result so that we don't lose precision.
 void 
 CppWriter::printCFP(const ConstantFP *CFP) {
+  APFloat APF = APFloat(CFP->getValueAPF());  // copy
+  if (CFP->getType() == Type::FloatTy)
+    APF.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven);
   Out << "ConstantFP::get(";
   if (CFP->getType() == Type::DoubleTy)
     Out << "Type::DoubleTy, ";
   else
     Out << "Type::FloatTy, ";
+  Out << "APFloat(";
 #if HAVE_PRINTF_A
   char Buffer[100];
-  sprintf(Buffer, "%A", CFP->getValue());
+  sprintf(Buffer, "%A", APF.convertToDouble());
   if ((!strncmp(Buffer, "0x", 2) ||
        !strncmp(Buffer, "-0x", 3) ||
        !strncmp(Buffer, "+0x", 3)) &&
-      (atof(Buffer) == CFP->getValue()))
+      APF.bitwiseIsEqual(APFloat(atof(Buffer)))) {
     if (CFP->getType() == Type::DoubleTy)
       Out << "BitsToDouble(" << Buffer << ")";
     else
-      Out << "BitsToFloat(" << Buffer << ")";
-  else {
+      Out << "BitsToFloat((float)" << Buffer << ")";
+    Out << ")";
+  } else {
 #endif
-    std::string StrVal = ftostr(CFP->getValue());
+    std::string StrVal = ftostr(CFP->getValueAPF());
 
     while (StrVal[0] == ' ')
       StrVal.erase(StrVal.begin());
@@ -237,17 +242,21 @@ CppWriter::printCFP(const ConstantFP *CFP) {
     if (((StrVal[0] >= '0' && StrVal[0] <= '9') ||
         ((StrVal[0] == '-' || StrVal[0] == '+') &&
          (StrVal[1] >= '0' && StrVal[1] <= '9'))) &&
-        (atof(StrVal.c_str()) == CFP->getValue()))
+        (CFP->isExactlyValue(atof(StrVal.c_str())))) {
       if (CFP->getType() == Type::DoubleTy)
         Out <<  StrVal;
       else
-        Out << StrVal;
+        Out << StrVal << "f";
+      }
     else if (CFP->getType() == Type::DoubleTy)
-      Out << "BitsToDouble(0x" << std::hex << DoubleToBits(CFP->getValue()) 
+      Out << "BitsToDouble(0x" << std::hex 
+          << DoubleToBits(CFP->getValueAPF().convertToDouble()) 
           << std::dec << "ULL) /* " << StrVal << " */";
     else 
-      Out << "BitsToFloat(0x" << std::hex << FloatToBits(CFP->getValue()) 
+      Out << "BitsToFloat(0x" << std::hex 
+          << FloatToBits(CFP->getValueAPF().convertToFloat())
           << std::dec << "U) /* " << StrVal << " */";
+    Out << ")";
 #if HAVE_PRINTF_A
   }
 #endif
-- 
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