fix uwp build (#5328)

src/cpu.cpp

@@ -243,6 +243,13 @@ static bool is_being_debugged()
 }
 
 #if defined _WIN32
+#if WINAPI_FAMILY == WINAPI_FAMILY_APP
+static int detectisa(const void* /*some_inst*/)
+{
+    // uwp does not support seh  :(
+    return 0;
+}
+#else  // WINAPI_FAMILY == WINAPI_FAMILY_APP
 static int g_sigill_caught = 0;
 static jmp_buf g_jmpbuf;
 
@@ -275,6 +282,7 @@ static int detectisa(const void* some_inst)
 
     return g_sigill_caught ? 0 : 1;
 }
+#endif // WINAPI_FAMILY == WINAPI_FAMILY_APP
 
 #if defined(__i386__) || defined(__x86_64__) || defined(_M_IX86) || defined(_M_X64)
 #ifdef _MSC_VER
@@ -2033,12 +2041,12 @@ static void initialize_global_cpu_info()
 
 #if defined _WIN32
 #if __arm__
-    g_cpu_support_arm_neon = detectisa(some_neon);
+    g_cpu_support_arm_neon = 1; // all modern windows arm devices have neon
     g_cpu_support_arm_vfpv4 = detectisa(some_vfpv4);
 #if __aarch64__
     g_cpu_support_arm_cpuid = detectisa(some_cpuid);
-    g_cpu_support_arm_asimdhp = detectisa(some_asimdhp);
-    g_cpu_support_arm_asimddp = detectisa(some_asimddp);
+    g_cpu_support_arm_asimdhp = detectisa(some_asimdhp) || IsProcessorFeaturePresent(43); // dp implies hp
+    g_cpu_support_arm_asimddp = detectisa(some_asimddp) || IsProcessorFeaturePresent(43); // 43 is PF_ARM_V82_DP_INSTRUCTIONS_AVAILABLE
     g_cpu_support_arm_asimdfhm = detectisa(some_asimdfhm);
     g_cpu_support_arm_bf16 = detectisa(some_bf16);
     g_cpu_support_arm_i8mm = detectisa(some_i8mm);