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-rw-r--r--src/include/swab.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/src/include/swab.h b/src/include/swab.h
index 956cfa5532..57fe5a2e53 100644
--- a/src/include/swab.h
+++ b/src/include/swab.h
@@ -21,6 +21,7 @@
#include <stdint.h>
+#if defined(__ROMCC__) || ENV_ARMV4
#define swab16(x) \
((unsigned short)( \
(((unsigned short)(x) & (unsigned short)0x00ffU) << 8) | \
@@ -43,5 +44,10 @@
(((uint64_t)(x) & (uint64_t)0x0000ff0000000000ULL) >> 24) | \
(((uint64_t)(x) & (uint64_t)0x00ff000000000000ULL) >> 40) | \
(((uint64_t)(x) & (uint64_t)0xff00000000000000ULL) >> 56)))
+#else /* __ROMCC__ || ENV_ARMV4 */
+#define swab16(x) ((uint16_t)__builtin_bswap16(x))
+#define swab32(x) ((uint32_t)__builtin_bswap32(x))
+#define swab64(x) ((uint64_t)__builtin_bswap64(x))
+#endif /* !(__ROMCC__ || ENV_ARMV4) */
#endif /* _SWAB_H */