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| author | Famiu Haque <famiuhaque@proton.me> | 2024-03-22 01:43:53 +0600 |
|---|---|---|
| committer | Famiu Haque <famiuhaque@proton.me> | 2024-03-22 01:43:53 +0600 |
| commit | 1dde678757216b019fff7ac3b6226ab997b86a8b (patch) | |
| tree | b780cab9ef38a579ad52be6e7c6c9fb689119049 /src/nvim/math.c | |
| parent | 563a369a1b254851d84c41838a8562ad7e655fa3 (diff) | |
| download | rneovim-1dde678757216b019fff7ac3b6226ab997b86a8b.tar.gz rneovim-1dde678757216b019fff7ac3b6226ab997b86a8b.tar.bz2 rneovim-1dde678757216b019fff7ac3b6226ab997b86a8b.zip | |
refactor(misc): use MSVC compiler builtin for `xctz()`
Problem: `xctz()` uses a fallback algorithm for MSVC, even though a compiler builtin exists.
Solution: Make `xctz()` use the compiler builtin for MSVC compiler.
Diffstat (limited to 'src/nvim/math.c')
| -rw-r--r-- | src/nvim/math.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/nvim/math.c b/src/nvim/math.c index 9a0825823c..39d166bb53 100644 --- a/src/nvim/math.c +++ b/src/nvim/math.c @@ -4,6 +4,10 @@ #include <stdint.h> #include <string.h> +#ifdef _MSC_VER +# include <intrin.h> // Required for _BitScanForward64 +#endif + #include "nvim/math.h" #ifdef INCLUDE_GENERATED_DECLARATIONS @@ -52,6 +56,10 @@ int xctz(uint64_t x) // Use compiler builtin if possible. #if defined(__clang__) || (defined(__GNUC__) && (__GNUC__ >= 4)) return __builtin_ctzll(x); +#elif defined(_MSC_VER) + unsigned long index; + _BitScanForward64(&index, x); + return (int)index; #else int count = 0; // Set x's trailing zeroes to ones and zero the rest. |