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| author | James McCoy <jamessan@jamessan.com> | 2020-08-08 08:57:35 -0400 |
|---|---|---|
| committer | James McCoy <jamessan@jamessan.com> | 2020-08-08 08:57:35 -0400 |
| commit | 840c12c10741d8f70e1787534fb6ea6d2b70edee (patch) | |
| tree | f89ad27acbbf0b36db7ac08eeae0b8362da1fabb /src/tree_sitter/bits.h | |
| parent | e813ec79c201c85c5af3b10c051ae92ab5cb8606 (diff) | |
| parent | f26df8bb66158baacb79c79822babaf137607cd6 (diff) | |
| download | rneovim-840c12c10741d8f70e1787534fb6ea6d2b70edee.tar.gz rneovim-840c12c10741d8f70e1787534fb6ea6d2b70edee.tar.bz2 rneovim-840c12c10741d8f70e1787534fb6ea6d2b70edee.zip | |
Merge remote-tracking branch 'upstream/master' into libcallnr
Diffstat (limited to 'src/tree_sitter/bits.h')
| -rw-r--r-- | src/tree_sitter/bits.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/src/tree_sitter/bits.h b/src/tree_sitter/bits.h new file mode 100644 index 0000000000..ce7a715567 --- /dev/null +++ b/src/tree_sitter/bits.h @@ -0,0 +1,29 @@ +#ifndef TREE_SITTER_BITS_H_ +#define TREE_SITTER_BITS_H_ + +#include <stdint.h> + +static inline uint32_t bitmask_for_index(uint16_t id) { + return (1u << (31 - id)); +} + +#if defined _WIN32 && !defined __GNUC__ + +#include <intrin.h> + +static inline uint32_t count_leading_zeros(uint32_t x) { + if (x == 0) return 32; + uint32_t result; + _BitScanReverse(&result, x); + return 31 - result; +} + +#else + +static inline uint32_t count_leading_zeros(uint32_t x) { + if (x == 0) return 32; + return __builtin_clz(x); +} + +#endif +#endif // TREE_SITTER_BITS_H_ |