StdLib: Add support for AArch64

[mirror_edk2.git] / StdLib / Include / Aarch64 / machine / byte_swap.h

diff --git a/StdLib/Include/Aarch64/machine/byte_swap.h b/StdLib/Include/Aarch64/machine/byte_swap.h
new file mode 100644 (file)
index 0000000..8e1272c
--- /dev/null
+++ b/StdLib/Include/Aarch64/machine/byte_swap.h
@@ -0,0 +1,63 @@
+/*-\r
+ * Copyright (c) 1997, 1999, 2002 The NetBSD Foundation, Inc.\r
+ * All rights reserved.\r
+ *\r
+ * This code is derived from software contributed to The NetBSD Foundation\r
+ * by Charles M. Hannum, Neil A. Carson, and Jason R. Thorpe.\r
+ *\r
+ * Redistribution and use in source and binary forms, with or without\r
+ * modification, are permitted provided that the following conditions\r
+ * are met:\r
+ * 1. Redistributions of source code must retain the above copyright\r
+ *    notice, this list of conditions and the following disclaimer.\r
+ * 2. Redistributions in binary form must reproduce the above copyright\r
+ *    notice, this list of conditions and the following disclaimer in the\r
+ *    documentation and/or other materials provided with the distribution.\r
+ *\r
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS\r
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED\r
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR\r
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS\r
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR\r
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF\r
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS\r
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN\r
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)\r
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE\r
+ * POSSIBILITY OF SUCH DAMAGE.\r
+ */\r
+\r
+#ifndef _AARCH64_BYTE_SWAP_H_\r
+#define _AARCH64_BYTE_SWAP_H_\r
+\r
+#ifdef __GNUC__\r
+#include <sys/types.h>\r
+__BEGIN_DECLS\r
+\r
+#define __BYTE_SWAP_U32_VARIABLE __byte_swap_u32_variable\r
+static __inline uint32_t\r
+__byte_swap_u32_variable(uint32_t v)\r
+{\r
+        uint32_t t1;\r
+\r
+        t1 = v ^ ((v << 16) | (v >> 16));\r
+        t1 &= 0xff00ffffU;\r
+        v = (v >> 8) | (v << 24);\r
+        v ^= (t1 >> 8);\r
+        return (v);\r
+}\r
+\r
+#define __BYTE_SWAP_U16_VARIABLE __byte_swap_u16_variable\r
+static __inline uint16_t\r
+__byte_swap_u16_variable(uint16_t v)\r
+{\r
+\r
+        v &= 0xffff;\r
+        v = (v >> 8) | (v << 8);\r
+        return (v);\r
+}\r
+\r
+__END_DECLS\r
+#endif\r
+\r
+#endif /* _AARCH64_BYTE_SWAP_H_ */\r