update simsimd to 5.4.4 (#5413)

* update simsimd to 5.4.4

* Update xmake.lua

* Update xmake.lua

packages/s/simsimd/xmake.lua

@@ -7,15 +7,36 @@ package("simsimd")
     add_urls("https://github.com/ashvardanian/SimSIMD/archive/refs/tags/$(version).tar.gz",
              "https://github.com/ashvardanian/SimSIMD.git")
 
+    add_versions("v5.4.4", "bf48d4772e82efdecd3acdc88431ea03b6110754ac263be338fd3ceb172998d2")
     add_versions("v4.3.2", "0732603a0680a4b9c70abe0b59de011447ad7db0e0631c2f7c307c0135aa4d43")
     add_versions("v4.3.1", "d3c54c5b27f8bbb161c8523c47ddc98bfeb75cac17066c959f42ebe78c518b0f")
     add_versions("v3.9.0", "8e79b628ba89beebc7c4c853323db0e10ebb6f85bcda2641e1ebaf77cfbda7f9")
 
+    if on_check then
+        on_check("android", function (package)
+            assert(package:check_cxxsnippets({test = [[
+                #include <arm_neon.h>
+                #pragma clang attribute push( \
+                    __attribute__((target("arch=armv8.2-a+dotprod"))), apply_to = function)
+                int32x4_t test_simd() {
+                    int32x4_t ab_vec = vdupq_n_s32(0);
+                    int8x16_t a_vec = vdupq_n_s8(1);
+                    int8x16_t b_vec = vdupq_n_s8(2);
+                    return vdotq_s32(ab_vec, a_vec, b_vec);
+                }
+                #pragma clang attribute pop
+            ]]}), "package(simsimd) requires a higher version of NDK.")
+        end)
+    end
+
     on_install(function (package)
         os.cp("include", package:installdir())
         if not package:has_ctypes("_Float16") then
             package:add("defines", "SIMSIMD_NATIVE_F16=0")
         end
+        if not package:has_ctypes("bfloat16_t") then
+            package:add("defines", "SIMSIMD_NATIVE_BF16=0")
+        end
     end)
 
     on_test(function (package)