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- changed "AboutEqualWithoutSign()" to "AboutEqual()" because we need to take the sign into account! 

git-svn-id: svn://ttmath.org/publicrep/ttmath/branches/chk@173 e52654a7-88a9-db11-a3e9-0013d4bc506e
This commit is contained in:
Christian Kaiser 2009-06-26 15:24:27 +00:00
parent 5597373093
commit 51b2c974a1
1 changed files with 19 additions and 1 deletions
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20
ttmath/ttmathbig.h
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@ -3864,7 +3864,7 @@ public:
return false;
}
bool AboutEqualWithoutSign(const Big<exp,man> & ss2, int nBitsToIgnore = 4) const
bool AboutEqual(const Big<exp,man> & ss2, int nBitsToIgnore = 4) const
{
// we should check the mantissas beforehand because sometimes we can have
// a mantissa set to zero but in the exponent something another value
@ -3874,12 +3874,30 @@ public:
return true;
}
if( IsSign() != ss2.IsSign() )
{
return false;
}
if( exponent==ss2.exponent )
{
if (mantissa == ss2.mantissa)
{
return(true);
}
if( IsSign() != ss2.IsSign() )
{
// we need to check the difference (both might be around Zero)
Big<exp,man> temp(*this);
temp.Sub(ss2);
Int<exp> exponent_diff(exponent - temp.exponent);
return(exponent_diff > man*TTMATH_BITS_PER_UINT-nBitsToIgnore);
}
// faster to mask the bits!
ASSERT(nBitsToIgnore < TTMATH_BITS_PER_UINT);
for (int n = man-1; n > 0; --n)