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Make loop condition more readable 

Signed-off-by: Herbert Poetzl <herbert@13thfloor.at>
This commit is contained in:
Herbert Poetzl 2018-01-31 23:53:20 +01:00 committed by Rick Altherr
parent b69ed5cc7e
commit 9c4971162e
1 changed files with 4 additions and 2 deletions
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6
lib/include/prjxray/xilinx/xc7series/crc.h
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@ -16,12 +16,14 @@ namespace xc7series {
// frame data (32bit) pair and return the newly computed CRC value.
uint32_t icap_crc(uint32_t addr, uint32_t data, uint32_t prev) {
constexpr int kAddressBitWidth = 5;
constexpr int kDataBitWidth = 32;
uint64_t poly = static_cast<uint64_t>(kCrc32CastagnoliPolynomial) << 1;
uint64_t val = (static_cast<uint64_t>(addr) << 32) | data;
uint64_t crc = prev;
constexpr int kFivePlusThrityTwo = 37;
for (int i = 0; i < kFivePlusThrityTwo; i++) {
for (int i = 0; i < kAddressBitWidth + kDataBitWidth; i++) {
if ((val & 1) != (crc & 1))
crc ^= poly;