# define LOCAL_GCC_PREREQ(maj, min) 0
#endif
-#ifdef __clang__
-# define LOCAL_CLANG_VERSION ((__clang_major__ << 8) | __clang_minor__)
-# define LOCAL_CLANG_PREREQ(maj, min) \
- (LOCAL_CLANG_VERSION >= (((maj) << 8) | (min)))
-#else
-# define LOCAL_CLANG_VERSION 0
-# define LOCAL_CLANG_PREREQ(maj, min) 0
-#endif // __clang__
+// handle clang compatibility
+#ifndef __has_builtin
+# define __has_builtin(x) 0
+#endif
// some endian fix (e.g.: mips-gcc doesn't define __BIG_ENDIAN__)
#if !defined(WORDS_BIGENDIAN) && \
#define HToBE32(X) BSwap32(X)
#endif
-// clang-3.3 and gcc-4.3 have builtin functions for swap32/swap64
-#if LOCAL_GCC_PREREQ(4, 3) || LOCAL_CLANG_PREREQ(3, 3)
+#if LOCAL_GCC_PREREQ(4, 8) || __has_builtin(__builtin_bswap16)
+#define HAVE_BUILTIN_BSWAP16
+#endif
+
+#if LOCAL_GCC_PREREQ(4, 3) || __has_builtin(__builtin_bswap32)
#define HAVE_BUILTIN_BSWAP32
+#endif
+
+#if LOCAL_GCC_PREREQ(4, 3) || __has_builtin(__builtin_bswap64)
#define HAVE_BUILTIN_BSWAP64
#endif
-// clang-3.3 and gcc-4.8 have a builtin function for swap16
-#if LOCAL_GCC_PREREQ(4, 8) || LOCAL_CLANG_PREREQ(3, 3)
-#define HAVE_BUILTIN_BSWAP16
+
+#if HAVE_MIPS32 && defined(__mips__) && !defined(__mips64) && \
+ defined(__mips_isa_rev) && (__mips_isa_rev >= 2) && (__mips_isa_rev < 6)
+#define VPX_USE_MIPS32_R2
#endif
static INLINE uint16_t BSwap16(uint16_t x) {
}
static INLINE uint32_t BSwap32(uint32_t x) {
-#if HAVE_MIPS32
+#if defined(VPX_USE_MIPS32_R2)
uint32_t ret;
__asm__ volatile (
"wsbh %[ret], %[x] \n\t"