diff options
Diffstat (limited to 'common/bits.cc')
| -rw-r--r-- | common/bits.cc | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/common/bits.cc b/common/bits.cc index 1fe65544..36c7539a 100644 --- a/common/bits.cc +++ b/common/bits.cc @@ -24,7 +24,8 @@ namespace nextpnr { -int Bits::generic_popcount(unsigned int v) { +int Bits::generic_popcount(unsigned int v) +{ unsigned int c; // c accumulates the total bits set in v for (c = 0; v; c++) { v &= v - 1; // clear the least significant bit set @@ -33,13 +34,14 @@ int Bits::generic_popcount(unsigned int v) { return c; } -int Bits::generic_ctz(unsigned int x) { - if(x == 0) { +int Bits::generic_ctz(unsigned int x) +{ + if (x == 0) { throw std::runtime_error("Cannot call ctz with arg = 0"); } - for(size_t i = 0; i < std::numeric_limits<unsigned int>::digits; ++i) { - if((x & (1 << i)) != 0) { + for (size_t i = 0; i < std::numeric_limits<unsigned int>::digits; ++i) { + if ((x & (1 << i)) != 0) { return i; } } @@ -48,4 +50,4 @@ int Bits::generic_ctz(unsigned int x) { throw std::runtime_error("Unreachable!"); } -}; +}; // namespace nextpnr |