diff --git a/include/endian.h b/include/endian.h
new file mode 100644
index 0000000..612e2de
--- /dev/null
+++ b/include/endian.h
@@ -0,0 +1,55 @@
+#ifndef __ENDIAN_H__
+# define __ENDIAN_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdint.h>
+
+/* Follow macros provided by GCC. */
+#define LITTLE_ENDIAN __ORDER_LITTLE_ENDIAN__
+#define BIG_ENDIAN __ORDER_BIG_ENDIAN__
+#define BYTE_ORDER __BYTE_ORDER__
+
+#if BYTE_ORDER == LITTLE_ENDIAN
+
+#define htobe16(x) __builtin_bswap16(x)
+#define htole16(x) (x)
+#define be16toh(x) __builtin_bswap16(x)
+#define le16toh(x) (x)
+
+#define htobe32(x) __builtin_bswap32(x)
+#define htole32(x) (x)
+#define be32toh(x) __builtin_bswap32(x)
+#define le32toh(x) (x)
+
+#define htobe64(x) __builtin_bswap64(x)
+#define htole64(x) (x)
+#define be64toh(x) __builtin_bswap64(x)
+#define le64toh(x) (x)
+
+#elif BYTE_ORDER == BIG_ENDIAN
+
+#define htobe16(x) (x)
+#define htole16(x) __builtin_bswap16(x)
+#define be16toh(x) (x)
+#define le16toh(x) __builtin_bswap16(x)
+
+#define htobe32(x) (x)
+#define htole32(x) __builtin_bswap32(x)
+#define be32toh(x) (x)
+#define le32toh(x) __builtin_bswap32(x)
+
+#define htobe64(x) (x)
+#define htole64(x) __builtin_bswap64(x)
+#define be64toh(x) (x)
+#define le64toh(x) __builtin_bswap64(x)
+
+#endif /* LITTLE_ENDIAN vs. BIG_ENDIAN */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /*__ENDIAN_H__*/
diff --git a/include/target/sh-generic/endian.h b/include/target/sh-generic/endian.h
deleted file mode 100644
index edec91f..0000000
--- a/include/target/sh-generic/endian.h
+++ /dev/null
@@ -1,21 +0,0 @@
-#ifndef __ENDIAN_H__
-# define __ENDIAN_H__
-
-/* CASIO calculators are configured as big-endian. */
-
-#define htobe16(x) (x)
-#define htole16(x) (__builtin_bswap16(x))
-#define be16toh(x) (x)
-#define le16toh(x) (__builtin_bswap16(x))
-
-#define htobe32(x) (x)
-#define htole32(x) (__builtin_bswap32(x))
-#define be32toh(x) (x)
-#define le32toh(x) (__builtin_bswap32(x))
-
-#define htobe64(x) (x)
-#define htole64(x) (__builtin_bswap64(x))
-#define be64toh(x) (x)
-#define le64toh(x) (__builtin_bswap64(x))
-
-#endif /*__ENDIAN_H__*/