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Generalize tcFullMultiply so that the operands can be of differing

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part widths.  Also, return the number of parts actually required to
hold the result's value.
Remove an over-cautious condition from rounding of float->hex conversion.

llvm-svn: 42669
This commit is contained in:
Neil Booth
2007-10-06 00:24:48 +00:00
parent 1d0d24c4fd
commit 0ea72a9a91
3 changed files with 30 additions and 20 deletions
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7
llvm/lib/Support/APFloat.cpp
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@@ -519,7 +519,7 @@ APFloat::multiplySignificand(const APFloat &rhs, const APFloat *addend)
partsCount = partCount();
APInt::tcFullMultiply(fullSignificand, lhsSignificand,
rhs.significandParts(), partsCount);
rhs.significandParts(), partsCount, partsCount);
lost_fraction = lfExactlyZero;
omsb = APInt::tcMSB(fullSignificand, newPartsCount) + 1;
@@ -1795,7 +1795,7 @@ APFloat::convertNormalToHexString(char *dst, unsigned int hexDigits,
/* hexDigits of zero means use the required number for the
precision. Otherwise, see if we are truncating. If we are,
found out if we need to round away from zero. */
find out if we need to round away from zero. */
if (hexDigits) {
if (hexDigits < outputDigits) {
/* We are dropping non-zero bits, so need to check how to round.
@@ -1845,7 +1845,8 @@ APFloat::convertNormalToHexString(char *dst, unsigned int hexDigits,
do {
q--;
*q = hexDigitChars[hexDigitValue (*q) + 1];
} while (*q == '0' && q > p);
} while (*q == '0');
assert (q >= p);
} else {
/* Add trailing zeroes. */
memset (dst, '0', outputDigits);