Author: aandrejevic
Date: Sat Jan 3 03:52:50 2015
New Revision: 65946
URL: http://svn.reactos.org/svn/reactos?rev=65946&view=rev
Log:
[FAST486]
Fix a bug in UnsignedDivMod128.
Modified:
trunk/reactos/lib/fast486/fpu.c
Modified: trunk/reactos/lib/fast486/fpu.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/lib/fast486/fpu.c?rev=65946&r1=65945&r2=65946&view=diff
==============================================================================
--- trunk/reactos/lib/fast486/fpu.c [iso-8859-1] (original)
+++ trunk/reactos/lib/fast486/fpu.c [iso-8859-1] Sat Jan 3 03:52:50 2015
@@ -84,12 +84,14 @@
/* Initialize the quotient */
*QuotientLow = *QuotientHigh = 0ULL;
+ /* Exit early if the dividend is lower than the divisor */
+ if ((DividendHigh == 0ULL) && (DividendLow < Divisor)) return ValueLow;
+
/* Normalize the current divisor */
Bits = CountLeadingZeros64(CurrentHigh);
CurrentHigh <<= Bits;
- /* Loop while the value is higher than or equal to the original divisor */
- while ((ValueHigh > 0ULL) || (ValueLow >= Divisor))
+ while (TRUE)
{
/* Shift the quotient left by one bit */
*QuotientHigh <<= 1;
@@ -109,6 +111,9 @@
/* Set the lowest bit of the quotient */
*QuotientLow |= 1;
+
+ /* Stop if the value is lower than the original divisor */
+ if ((ValueHigh == 0ULL) && (ValueLow < Divisor)) break;
}
/* Shift the current divisor right by one bit */
