[APInt] Use getNumWords function in udiv/urem/udivrem instead of reimplementinging it.

llvm-svn: 302625

diff --git a/llvm/lib/Support/APInt.cpp b/llvm/lib/Support/APInt.cpp
index 3bfd6ba..99a7b18 100644 (file)
--- a/llvm/lib/Support/APInt.cpp
+++ b/llvm/lib/Support/APInt.cpp
@@ -1578,11 +1578,9 @@ APInt APInt::udiv(const APInt& RHS) const {
   }
 
   // Get some facts about the LHS and RHS number of bits and words
-  unsigned rhsBits = RHS.getActiveBits();
-  unsigned rhsWords = !rhsBits ? 0 : (APInt::whichWord(rhsBits - 1) + 1);
+  unsigned rhsWords = getNumWords(RHS.getActiveBits());
   assert(rhsWords && "Divided by zero???");
-  unsigned lhsBits = this->getActiveBits();
-  unsigned lhsWords = !lhsBits ? 0 : (APInt::whichWord(lhsBits - 1) + 1);
+  unsigned lhsWords = getNumWords(getActiveBits());
 
   // Deal with some degenerate cases
   if (!lhsWords)
@@ -1623,12 +1621,10 @@ APInt APInt::urem(const APInt& RHS) const {
   }
 
   // Get some facts about the LHS
-  unsigned lhsBits = getActiveBits();
-  unsigned lhsWords = !lhsBits ? 0 : (whichWord(lhsBits - 1) + 1);
+  unsigned lhsWords = getNumWords(getActiveBits());
 
   // Get some facts about the RHS
-  unsigned rhsBits = RHS.getActiveBits();
-  unsigned rhsWords = !rhsBits ? 0 : (APInt::whichWord(rhsBits - 1) + 1);
+  unsigned rhsWords = getNumWords(RHS.getActiveBits());
   assert(rhsWords && "Performing remainder operation by zero ???");
 
   // Check the degenerate cases
@@ -1677,10 +1673,8 @@ void APInt::udivrem(const APInt &LHS, const APInt &RHS,
   }
 
   // Get some size facts about the dividend and divisor
-  unsigned lhsBits  = LHS.getActiveBits();
-  unsigned lhsWords = !lhsBits ? 0 : (APInt::whichWord(lhsBits - 1) + 1);
-  unsigned rhsBits  = RHS.getActiveBits();
-  unsigned rhsWords = !rhsBits ? 0 : (APInt::whichWord(rhsBits - 1) + 1);
+  unsigned lhsWords = getNumWords(LHS.getActiveBits());
+  unsigned rhsWords = getNumWords(RHS.getActiveBits());
 
   // Check the degenerate cases
   if (lhsWords == 0) {