1bb3bf6226
This reverts commit e0d8b2ec53.
For at least GCC 4.8.3, adding nomips16 function attribute still cannot
prevent it from being inlined in mips16 context. So revert it first in
preparation for a better workaround.
[1] Inlining nomips16 function into mips16 function can result in
undefined builtins, https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55777
Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
Cc: Maciej W. Rozycki <macro@linux-mips.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/11240/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
70 lines
1.4 KiB
C
70 lines
1.4 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1996, 99, 2003 by Ralf Baechle
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*/
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#ifndef _ASM_SWAB_H
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#define _ASM_SWAB_H
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#include <linux/compiler.h>
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#include <linux/types.h>
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#define __SWAB_64_THRU_32__
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#if (defined(__mips_isa_rev) && (__mips_isa_rev >= 2)) || \
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defined(_MIPS_ARCH_LOONGSON3A)
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static inline __attribute_const__ __u16 __arch_swab16(__u16 x)
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{
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__asm__(
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" .set push \n"
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" .set arch=mips32r2 \n"
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" wsbh %0, %1 \n"
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" .set pop \n"
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: "=r" (x)
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: "r" (x));
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return x;
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}
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#define __arch_swab16 __arch_swab16
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static inline __attribute_const__ __u32 __arch_swab32(__u32 x)
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{
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__asm__(
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" .set push \n"
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" .set arch=mips32r2 \n"
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" wsbh %0, %1 \n"
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" rotr %0, %0, 16 \n"
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" .set pop \n"
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: "=r" (x)
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: "r" (x));
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return x;
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}
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#define __arch_swab32 __arch_swab32
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/*
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* Having already checked for MIPS R2, enable the optimized version for
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* 64-bit kernel on r2 CPUs.
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*/
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#ifdef __mips64
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static inline __attribute_const__ __u64 __arch_swab64(__u64 x)
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{
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__asm__(
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" .set push \n"
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" .set arch=mips64r2 \n"
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" dsbh %0, %1 \n"
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" dshd %0, %0 \n"
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" .set pop \n"
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: "=r" (x)
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: "r" (x));
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return x;
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}
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#define __arch_swab64 __arch_swab64
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#endif /* __mips64 */
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#endif /* MIPS R2 or newer or Loongson 3A */
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#endif /* _ASM_SWAB_H */
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