atombios: add support for other endians.

This is a cleaned up (in as much as atombios can be..) of benh's patch.

airlied - removed benh's debugging for now, it might need to be put back later..

1 files changed, 30 insertions, 0 deletions

diff --git a/src/radeon.h b/src/radeon.h
index 6f7fadef..3f266de6 100644
--- a/src/radeon.h
+++ b/src/radeon.h
@@ -98,6 +98,36 @@
 #define MIN(a,b) ((a)>(b)?(b):(a))
 #endif
 
+#if HAVE_BYTESWAP_H
+#include <byteswap.h>
+#elif defined(USE_SYS_ENDIAN_H)
+#include <sys/endian.h>
+#else
+#define bswap_16(value)  \
+        ((((value) & 0xff) << 8) | ((value) >> 8))
+
+#define bswap_32(value) \
+        (((uint32_t)bswap_16((uint16_t)((value) & 0xffff)) << 16) | \
+        (uint32_t)bswap_16((uint16_t)((value) >> 16)))
+ 
+#define bswap_64(value) \
+        (((uint64_t)bswap_32((uint32_t)((value) & 0xffffffff)) \
+            << 32) | \
+        (uint64_t)bswap_32((uint32_t)((value) >> 32)))
+#endif
+
+#if X_BYTE_ORDER == X_BIG_ENDIAN
+#define le32_to_cpu(x) bswap_32(x)
+#define le16_to_cpu(x) bswap_16(x)
+#define cpu_to_le32(x) bswap_32(x)
+#define cpu_to_le16(x) bswap_16(x)
+#else
+#define le32_to_cpu(x) (x)
+#define le16_to_cpu(x) (x)
+#define cpu_to_le32(x) (x)
+#define cpu_to_le16(x) (x)
+#endif
+
 /* Provide substitutes for gcc's __FUNCTION__ on other compilers */
 #if !defined(__GNUC__) && !defined(__FUNCTION__)
 # define __FUNCTION__ __func__		/* C99 */