Move the lib/ stuff around a bit

[fio.git] / lib / bswap.h

diff --git a/lib/bswap.h b/lib/bswap.h
new file mode 100644 (file)
index 0000000..30fcac5
--- /dev/null
+++ b/lib/bswap.h
@@ -0,0 +1,46 @@
+#ifndef FIO_BSWAP_H
+#define FIO_BSWAP_H
+
+#include <inttypes.h>
+
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+static inline uint32_t __be32_to_cpu(uint32_t val)
+{
+       uint32_t c1, c2, c3, c4;
+
+       c1 = (val >> 24) & 0xff;
+       c2 = (val >> 16) & 0xff;
+       c3 = (val >> 8) & 0xff;
+       c4 = val & 0xff;
+
+       return c1 | c2 << 8 | c3 << 16 | c4 << 24;
+}
+
+static inline uint64_t __be64_to_cpu(uint64_t val)
+{
+       uint64_t c1, c2, c3, c4, c5, c6, c7, c8;
+
+       c1 = (val >> 56) & 0xff;
+       c2 = (val >> 48) & 0xff;
+       c3 = (val >> 40) & 0xff;
+       c4 = (val >> 32) & 0xff;
+       c5 = (val >> 24) & 0xff;
+       c6 = (val >> 16) & 0xff;
+       c7 = (val >> 8) & 0xff;
+       c8 = val & 0xff;
+
+       return c1 | c2 << 8 | c3 << 16 | c4 << 24 | c5 << 32 | c6 << 40 | c7 << 48 | c8 << 56;
+}
+#else
+static inline uint64_t __be64_to_cpu(uint64_t val)
+{
+       return val;
+}
+
+static inline uint32_t __be32_to_cpu(uint32_t val)
+{
+       return val;
+}
+#endif
+
+#endif