[llvm-commits] CVS: llvm/lib/Target/CBackend/Writer.cpp
Brian Gaeke
gaeke at cs.uiuc.edu
Wed Aug 25 12:00:53 PDT 2004
Changes in directory llvm/lib/Target/CBackend:
Writer.cpp updated: 1.193 -> 1.194
---
Log message:
New version of Bill Wendling's PR33: http://llvm.cs.uiuc.edu/PR33 patch.
---
Diffs of the changes: (+38 -24)
Index: llvm/lib/Target/CBackend/Writer.cpp
diff -u llvm/lib/Target/CBackend/Writer.cpp:1.193 llvm/lib/Target/CBackend/Writer.cpp:1.194
--- llvm/lib/Target/CBackend/Writer.cpp:1.193 Mon Aug 9 19:19:16 2004
+++ llvm/lib/Target/CBackend/Writer.cpp Wed Aug 25 14:00:42 2004
@@ -557,30 +557,40 @@
Out << "(*(" << (FPC->getType() == Type::FloatTy ? "float" : "double")
<< "*)&FPConstant" << I->second << ")";
} else {
- std::string Num;
-#if HAVE_PRINTF_A
- // Print out the constant as a floating point number.
- char Buffer[100];
- sprintf(Buffer, "%a", FPC->getValue());
- Num = Buffer;
-#else
- Num = ftostr(FPC->getValue());
-#endif
-
if (IsNAN(FPC->getValue())) {
// The value is NaN
+
+ // The prefix for a quiet NaN is 0x7FF8. For a signalling NaN,
+ // it's 0x7ff4.
+ const unsigned long QuietNaN = 0x7ff8UL;
+ const unsigned long SignalNaN = 0x7ff4UL;
+
+ // We need to grab the first part of the FP #
+ union {
+ double d;
+ uint64_t ll;
+ } DHex;
+ char Buffer[100];
+
+ DHex.d = FPC->getValue();
+ sprintf(Buffer, "0x%llx", DHex.ll);
+
+ std::string Num(&Buffer[0], &Buffer[6]);
+ unsigned long Val = strtoul(Num.c_str(), 0, 16);
+
if (FPC->getType() == Type::FloatTy)
- Out << "LLVM_NANF(\"0\") /*nan*/ ";
+ Out << "LLVM_NAN" << (Val == QuietNaN ? "" : "S") << "F(\""
+ << Buffer << "\") /*nan*/ ";
else
- Out << "LLVM_NAN(\"0\") /*nan*/ ";
+ Out << "LLVM_NAN" << (Val == QuietNaN ? "" : "S") << "(\""
+ << Buffer << "\") /*nan*/ ";
} else if (IsInf(FPC->getValue())) {
// The value is Inf
if (FPC->getValue() < 0) Out << "-";
- if (FPC->getType() == Type::FloatTy)
- Out << "LLVM_INFF /*inf*/ ";
- else
- Out << "LLVM_INF /*inf*/ ";
+ Out << "LLVM_INF" << (FPC->getType() == Type::FloatTy ? "F" : "")
+ << " /*inf*/ ";
} else {
+ std::string Num = ftostr(FPC->getValue());
Out << Num;
}
}
@@ -752,15 +762,19 @@
//
// Similar to __builtin_inf, except the return type is float.
Out << "#ifdef __GNUC__\n"
- << "#define LLVM_NAN(NanStr) __builtin_nan(NanStr) /* Double */\n"
- << "#define LLVM_NANF(NanStr) __builtin_nan(NanStr) /* Float */\n"
- << "#define LLVM_INF __builtin_inf() /* Double */\n"
- << "#define LLVM_INFF __builtin_inff() /* Float */\n"
+ << "#define LLVM_NAN(NanStr) __builtin_nan(NanStr) /* Double */\n"
+ << "#define LLVM_NANF(NanStr) __builtin_nanf(NanStr) /* Float */\n"
+ << "#define LLVM_NANS(NanStr) __builtin_nans(NanStr) /* Double */\n"
+ << "#define LLVM_NANSF(NanStr) __builtin_nansf(NanStr) /* Float */\n"
+ << "#define LLVM_INF __builtin_inf() /* Double */\n"
+ << "#define LLVM_INFF __builtin_inff() /* Float */\n"
<< "#else\n"
- << "#define LLVM_NAN(NanStr) ((double)0.0) /* Double */\n"
- << "#define LLVM_NANF(NanStr) 0.0F /* Float */\n"
- << "#define LLVM_INF ((double)0.0) /* Double */\n"
- << "#define LLVM_INFF 0.0F /* Float */\n"
+ << "#define LLVM_NAN(NanStr) ((double)0.0) /* Double */\n"
+ << "#define LLVM_NANF(NanStr) 0.0F /* Float */\n"
+ << "#define LLVM_NANS(NanStr) ((double)0.0) /* Double */\n"
+ << "#define LLVM_NANSF(NanStr) 0.0F /* Float */\n"
+ << "#define LLVM_INF ((double)0.0) /* Double */\n"
+ << "#define LLVM_INFF 0.0F /* Float */\n"
<< "#endif\n";
}
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