Add back convertFromSignExtendedInteger.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42735 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/llvm/ADT/APFloat.h b/include/llvm/ADT/APFloat.h
index 67c979c..f5511f4 100644
--- a/include/llvm/ADT/APFloat.h
+++ b/include/llvm/ADT/APFloat.h
@@ -194,6 +194,8 @@
opStatus convert(const fltSemantics &, roundingMode);
opStatus convertToInteger(integerPart *, unsigned int, bool,
roundingMode) const;
+ opStatus convertFromSignExtendedInteger(const integerPart *, unsigned int,
+ bool, roundingMode);
opStatus convertFromZeroExtendedInteger(const integerPart *, unsigned int,
bool, roundingMode);
opStatus convertFromString(const char *, roundingMode);
diff --git a/lib/Support/APFloat.cpp b/lib/Support/APFloat.cpp
index 8343ffe..388bbd7 100644
--- a/lib/Support/APFloat.cpp
+++ b/lib/Support/APFloat.cpp
@@ -1587,6 +1587,36 @@
return normalize(rounding_mode, lost_fraction);
}
+/* Convert a two's complement integer SRC to a floating point number,
+ rounding according to ROUNDING_MODE. ISSIGNED is true if the
+ integer is signed, in which case it must be sign-extended. */
+APFloat::opStatus
+APFloat::convertFromSignExtendedInteger(const integerPart *src,
+ unsigned int srcCount,
+ bool isSigned,
+ roundingMode rounding_mode)
+{
+ opStatus status;
+
+ if (isSigned
+ && APInt::tcExtractBit(src, srcCount * integerPartWidth - 1)) {
+ integerPart *copy;
+
+ /* If we're signed and negative negate a copy. */
+ sign = true;
+ copy = new integerPart[srcCount];
+ APInt::tcAssign(copy, src, srcCount);
+ APInt::tcNegate(copy, srcCount);
+ status = convertFromUnsignedParts(copy, srcCount, rounding_mode);
+ delete [] copy;
+ } else {
+ sign = false;
+ status = convertFromUnsignedParts(src, srcCount, rounding_mode);
+ }
+
+ return status;
+}
+
/* FIXME: should this just take a const APInt reference? */
APFloat::opStatus
APFloat::convertFromZeroExtendedInteger(const integerPart *parts,