diff options
Diffstat (limited to 'core/runtime')
| -rw-r--r-- | core/runtime/core.odin | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/core/runtime/core.odin b/core/runtime/core.odin index a84430731..0599dbbed 100644 --- a/core/runtime/core.odin +++ b/core/runtime/core.odin @@ -617,6 +617,26 @@ excl_bit_set :: inline proc(s: ^$S/bit_set[$E; $U], other: S) -> S { @(builtin) excl :: proc{excl_elem, excl_elems, excl_bit_set}; +@(builtin) +card :: proc(s: $S/bit_set[$E; $U]) -> int { + when size_of(S) == 1 { + foreign { @(link_name="llvm.ctpop.i8") count_ones :: proc(i: u8) -> u8 --- } + return int(count_ones(transmute(u8)s)); + } else when size_of(S) == 2 { + foreign { @(link_name="llvm.ctpop.i16") count_ones :: proc(i: u16) -> u16 --- } + return int(count_ones(transmute(u16)s)); + } else when size_of(S) == 4 { + foreign { @(link_name="llvm.ctpop.i32") count_ones :: proc(i: u32) -> u32 --- } + return int(count_ones(transmute(u32)s)); + } else when size_of(S) == 8 { + foreign { @(link_name="llvm.ctpop.i64") count_ones :: proc(i: u64) -> u64 --- } + return int(count_ones(transmute(u64)s)); + } else { + #assert(false); + return 0; + } +} + |