238     const Chunk difference = RawBigit(i + offset) - other.RawBigit(i) - borrow;  in SubtractBignum()  local
239     RawBigit(i + offset) = difference & kBigitMask;  in SubtractBignum()
240     borrow = difference >> (kChunkSize - 1);  in SubtractBignum()
243     const Chunk difference = RawBigit(i + offset) - borrow;  in SubtractBignum()  local
244     RawBigit(i + offset) = difference & kBigitMask;  in SubtractBignum()
245     borrow = difference >> (kChunkSize - 1);  in SubtractBignum()
793     const Chunk difference = RawBigit(i + exponent_diff) - (remove & kBigitMask);  in SubtractTimes()  local
794     RawBigit(i + exponent_diff) = difference & kBigitMask;  in SubtractTimes()
795     borrow = static_cast<Chunk>((difference >> (kChunkSize - 1)) +  in SubtractTimes()
802     const Chunk difference = RawBigit(i) - borrow;  in SubtractTimes()  local
803     RawBigit(i) = difference & kBigitMask;  in SubtractTimes()
804     borrow = difference >> (kChunkSize - 1);  in SubtractTimes()