diff options
author | Neil Booth <neil@daikokuya.co.uk> | 2007-10-07 12:15:41 +0000 |
---|---|---|
committer | Neil Booth <neil@daikokuya.co.uk> | 2007-10-07 12:15:41 +0000 |
commit | f16c595252de363e0e1f6895a5a626bc30017053 (patch) | |
tree | 1a0fe293287662ec4f0f7e3d4a9cf11de7f4af31 /lib/Support | |
parent | 7a7bc0f7248881cff466e964c4409c9c7da9da85 (diff) | |
download | external_llvm-f16c595252de363e0e1f6895a5a626bc30017053.zip external_llvm-f16c595252de363e0e1f6895a5a626bc30017053.tar.gz external_llvm-f16c595252de363e0e1f6895a5a626bc30017053.tar.bz2 |
Add back convertFromSignExtendedInteger.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42735 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Support')
-rw-r--r-- | lib/Support/APFloat.cpp | 30 |
1 files changed, 30 insertions, 0 deletions
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 @@ APFloat::convertFromUnsignedParts(const integerPart *src, 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, |