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authorIngo Molnar <mingo@elte.hu>2009-01-11 15:34:05 +0100
committerIngo Molnar <mingo@elte.hu>2009-01-11 15:34:05 +0100
commitd19b85db9d5c44a4c21dcb10d6fbadaa4425ab2a (patch)
tree250be7a5a29069f7d1f4524fa45ab0e988833025 /include/asm-xtensa/byteorder.h
parent490dea45d00f01847ebebd007685d564aaf2cd98 (diff)
parentc59765042f53a79a7a65585042ff463b69cb248c (diff)
downloadop-kernel-dev-d19b85db9d5c44a4c21dcb10d6fbadaa4425ab2a.zip
op-kernel-dev-d19b85db9d5c44a4c21dcb10d6fbadaa4425ab2a.tar.gz
Merge commit 'v2.6.29-rc1' into timers/urgent
Diffstat (limited to 'include/asm-xtensa/byteorder.h')
-rw-r--r--include/asm-xtensa/byteorder.h82
1 files changed, 0 insertions, 82 deletions
diff --git a/include/asm-xtensa/byteorder.h b/include/asm-xtensa/byteorder.h
deleted file mode 100644
index 765edf1..0000000
--- a/include/asm-xtensa/byteorder.h
+++ /dev/null
@@ -1,82 +0,0 @@
-/*
- * include/asm-xtensa/byteorder.h
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2001 - 2005 Tensilica Inc.
- */
-
-#ifndef _XTENSA_BYTEORDER_H
-#define _XTENSA_BYTEORDER_H
-
-#include <asm/types.h>
-#include <linux/compiler.h>
-
-static __inline__ __attribute_const__ __u32 ___arch__swab32(__u32 x)
-{
- __u32 res;
- /* instruction sequence from Xtensa ISA release 2/2000 */
- __asm__("ssai 8 \n\t"
- "srli %0, %1, 16 \n\t"
- "src %0, %0, %1 \n\t"
- "src %0, %0, %0 \n\t"
- "src %0, %1, %0 \n"
- : "=&a" (res)
- : "a" (x)
- );
- return res;
-}
-
-static __inline__ __attribute_const__ __u16 ___arch__swab16(__u16 x)
-{
- /* Given that 'short' values are signed (i.e., can be negative),
- * we cannot assume that the upper 16-bits of the register are
- * zero. We are careful to mask values after shifting.
- */
-
- /* There exists an anomaly between xt-gcc and xt-xcc. xt-gcc
- * inserts an extui instruction after putting this function inline
- * to ensure that it uses only the least-significant 16 bits of
- * the result. xt-xcc doesn't use an extui, but assumes the
- * __asm__ macro follows convention that the upper 16 bits of an
- * 'unsigned short' result are still zero. This macro doesn't
- * follow convention; indeed, it leaves garbage in the upport 16
- * bits of the register.
-
- * Declaring the temporary variables 'res' and 'tmp' to be 32-bit
- * types while the return type of the function is a 16-bit type
- * forces both compilers to insert exactly one extui instruction
- * (or equivalent) to mask off the upper 16 bits. */
-
- __u32 res;
- __u32 tmp;
-
- __asm__("extui %1, %2, 8, 8\n\t"
- "slli %0, %2, 8 \n\t"
- "or %0, %0, %1 \n"
- : "=&a" (res), "=&a" (tmp)
- : "a" (x)
- );
-
- return res;
-}
-
-#define __arch__swab32(x) ___arch__swab32(x)
-#define __arch__swab16(x) ___arch__swab16(x)
-
-#if !defined(__STRICT_ANSI__) || defined(__KERNEL__)
-# define __BYTEORDER_HAS_U64__
-# define __SWAB_64_THRU_32__
-#endif
-
-#ifdef __XTENSA_EL__
-# include <linux/byteorder/little_endian.h>
-#elif defined(__XTENSA_EB__)
-# include <linux/byteorder/big_endian.h>
-#else
-# error processor byte order undefined!
-#endif
-
-#endif /* _XTENSA_BYTEORDER_H */
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