Fix issues where builtins not being detected

Signed-off-by: Ian <[email protected]>

Author: Rinzii

include/ccmath/internal/math/generic/builtins/basic/fma.hpp

@@ -12,6 +12,7 @@
 
 // ReSharper disable once CppUnusedIncludeDirective
 #include "ccmath/internal/math/generic/builtins/builtin_helpers.hpp"
+#include "ccmath/internal/predef/has_builtin.hpp"
 #include "ccmath/internal/support/always_false.hpp"
 
 // Checks if the cpu supports FMA instructions.
@@ -51,7 +52,7 @@ namespace ccm::builtin
 	 */
 	template <typename T>
 	inline constexpr bool has_fma =
-		#if defined(__builtin_fma) || defined(__builtin_fmaf) || defined(__builtin_fmal)
+		#if CCM_HAS_BUILTIN(__builtin_fma) || CCM_HAS_BUILTIN(__builtin_fmaf) || CCM_HAS_BUILTIN(__builtin_fmal)
 			is_valid_builtin_type<T>;
 		#else
 			false;

include/ccmath/internal/support/bits.hpp

@@ -309,7 +309,7 @@ namespace ccm::support
 		if (x < 2) { return 1; }
 
 		// Assume we got a good input
-		const unsigned n = std::numeric_limits<T>::digits - countl_zero(static_cast<T>(x - 1U));
+		const unsigned n = static_cast<unsigned>(std::numeric_limits<T>::digits - countl_zero(static_cast<T>(x - 1U)));
 
 		if constexpr (sizeof(T) >= sizeof(unsigned)) { return T{1} << n; }
 		else