fixup! [libc][math][c23] Add fabsf16 C23 math function

Simplify check for _Float16 support.

Author: overmighty

libc/include/llvm-libc-types/float16.h

@@ -9,30 +9,12 @@
 #ifndef LLVM_LIBC_TYPES_FLOAT16_H
 #define LLVM_LIBC_TYPES_FLOAT16_H
 
-#include "src/__support/macros/properties/architectures.h"
 #include "src/__support/macros/properties/compiler.h"
-#include "src/__support/macros/properties/cpu_features.h"
 
-#if defined(LIBC_TARGET_ARCH_IS_X86_64) && defined(LIBC_TARGET_CPU_HAS_SSE2)
-#if (defined(LIBC_COMPILER_CLANG_VER) && (LIBC_COMPILER_CLANG_VER >= 1500)) || \
-    (defined(LIBC_COMPILER_GCC_VER) && (LIBC_COMPILER_GCC_VER >= 1201))
+#if defined(__FLT16_MANT_DIG__) &&                                             \
+    (!defined(LIBC_COMPILER_IS_GCC) || LIBC_COMPILER_GCC_VER >= 1301)
 #define LIBC_TYPES_HAS_FLOAT16
 using float16 = _Float16;
 #endif
-#endif
-#if defined(LIBC_TARGET_ARCH_IS_AARCH64)
-#if (defined(LIBC_COMPILER_CLANG_VER) && (LIBC_COMPILER_CLANG_VER >= 900)) ||  \
-    (defined(LIBC_COMPILER_GCC_VER) && (LIBC_COMPILER_GCC_VER >= 1301))
-#define LIBC_TYPES_HAS_FLOAT16
-using float16 = _Float16;
-#endif
-#endif
-#if defined(LIBC_TARGET_ARCH_IS_ANY_RISCV)
-#if (defined(LIBC_COMPILER_CLANG_VER) && (LIBC_COMPILER_CLANG_VER >= 1300)) || \
-    (defined(LIBC_COMPILER_GCC_VER) && (LIBC_COMPILER_GCC_VER >= 1301))
-#define LIBC_TYPES_HAS_FLOAT16
-using float16 = _Float16;
-#endif
-#endif
 
 #endif // LLVM_LIBC_TYPES_FLOAT16_H