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Fix the carry in addition.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34465 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Spencer 2007-02-21 05:44:56 +00:00
parent f31c784f27
commit 60c0a6a74b
1 changed files with 2 additions and 2 deletions
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4
lib/Support/APInt.cpp
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@ -192,9 +192,9 @@ APInt& APInt::operator--() {
static uint64_t add(uint64_t dest[], uint64_t x[], uint64_t y[], uint32_t len) {
uint64_t carry = 0;
for (uint32_t i = 0; i< len; ++i) {
uint64_t save = std::max(x[i],y[i]);
dest[i] = x[i] + y[i] + carry;
carry = dest[i] < save ? 1 : 0;
uint64_t limit = std::min(x[i],y[i]);
carry = dest[i] < limit || (carry && dest[i] == limit);
}
return carry;
}