Initial version of the CRIS port.

1 files changed, 47 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/cris/bits/byteswap.h b/libc/sysdeps/linux/cris/bits/byteswap.h
new file mode 100644
index 000000000..60544a0ad
--- /dev/null
+++ b/libc/sysdeps/linux/cris/bits/byteswap.h
@@ -0,0 +1,47 @@
+#define ___swab16(x) \
+({ \
+	unsigned short __x = (x); \
+	((unsigned short)( \
+		(((unsigned short)(__x) & (unsigned short)0x00ffU) << 8) | \
+		(((unsigned short)(__x) & (unsigned short)0xff00U) >> 8) )); \
+})
+
+#define ___swab32(x) \
+({ \
+	unsigned long __x = (x); \
+	((unsigned long)( \
+		(((unsigned long)(__x) & (unsigned long)0x000000ffUL) << 24) | \
+		(((unsigned long)(__x) & (unsigned long)0x0000ff00UL) <<  8) | \
+		(((unsigned long)(__x) & (unsigned long)0x00ff0000UL) >>  8) | \
+		(((unsigned long)(__x) & (unsigned long)0xff000000UL) >> 24) )); \
+})
+
+/* these are CRIS specific */
+
+static inline unsigned short __fswab16(unsigned short x)
+{
+	__asm__ ("swapb %0" : "=r" (x) : "0" (x));
+	
+	return(x);
+}
+
+static inline unsigned long __fswab32(unsigned long x)
+{
+	__asm__ ("swapwb %0" : "=r" (x) : "0" (x));
+	
+	return(x);
+}
+
+#  define __bswap_16(x) \
+(__builtin_constant_p((unsigned short)(x)) ? \
+ ___swab16((x)) : \
+ __fswab16((x)))
+
+#  define __bswap_32(x) \
+(__builtin_constant_p((unsigned long)(x)) ? \
+ ___swab32((x)) : \
+ __fswab32((x)))
+
+
+
+