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Add an APFloat::convertToInt(APSInt) function that automatically manages the

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memory for the result.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135259 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jeffrey Yasskin
2011-07-15 07:04:56 +00:00
parent a83bba46b3
commit 3d42bfbbdd
3 changed files with 69 additions and 0 deletions
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18
lib/Support/APFloat.cpp
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@ -13,6 +13,7 @@
//===----------------------------------------------------------------------===//
#include "llvm/ADT/APFloat.h"
#include "llvm/ADT/APSInt.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/FoldingSet.h"
#include "llvm/Support/ErrorHandling.h"
@ -2084,6 +2085,23 @@ APFloat::convertToInteger(integerPart *parts, unsigned int width,
return fs;
}
/* Same as convertToInteger(integerPart*, ...), except the result is returned in
an APSInt, whose initial bit-width and signed-ness are used to determine the
precision of the conversion.
*/
APFloat::opStatus
APFloat::convertToInteger(APSInt &result,
roundingMode rounding_mode, bool *isExact) const
{
unsigned bitWidth = result.getBitWidth();
SmallVector<uint64_t, 4> parts(result.getNumWords());
opStatus status = convertToInteger(
parts.data(), bitWidth, result.isSigned(), rounding_mode, isExact);
// Keeps the original signed-ness.
result = APInt(bitWidth, parts.size(), parts.data());
return status;
}
/* Convert an unsigned integer SRC to a floating point number,
rounding according to ROUNDING_MODE. The sign of the floating
point number is not modified. */