From ebb6e97d0dbc226e93196bf3d0085443734f08dc Mon Sep 17 00:00:00 2001
From: "A. Jiang" <de34@live.cn>
Date: Wed, 14 Aug 2024 19:24:10 +0800
Subject: [PATCH] Avoid `__popcnt64` on MSVC Windows 32-bit platform

The `__popcnt64` intrinsic isn't supported on 32-bit Windows, so `__popcnt` should be used instead.
---
 sqlite-vec.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sqlite-vec.c b/sqlite-vec.c
index cb4901d..78aad2d 100644
--- a/sqlite-vec.c
+++ b/sqlite-vec.c
@@ -529,7 +529,11 @@ static unsigned int __builtin_popcountl(unsigned int x) {
 }
 #else
 #include <intrin.h>
+#ifdef _WIN64
 #define __builtin_popcountl __popcnt64
+#else
+static unsigned int __builtin_popcountl(u64 n) { return __popcnt((u32)n) + __popcnt((u32)(n >> 32)); }
+#endif
 #endif
 #endif