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Revert "MIPS: UAPI: Fix unrecognized opcode WSBH/DSBH/DSHD when using MIPS16."

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This reverts commit e0d8b2ec532852d4b5aabcec3e7611848c32237d.

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>
This commit is contained in:
Yousong Zhou 2015-09-26 13:41:42 +08:00 committed by Ralf Baechle
parent 049e6dde7e
commit 1bb3bf6226
1 changed files with 3 additions and 9 deletions
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12
arch/mips/include/uapi/asm/swab.h
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@ -16,13 +16,11 @@
#if (defined(__mips_isa_rev) && (__mips_isa_rev >= 2)) || \
defined(_MIPS_ARCH_LOONGSON3A)
static inline __attribute__((nomips16)) __attribute_const__
__u16 __arch_swab16(__u16 x)
static inline __attribute_const__ __u16 __arch_swab16(__u16 x)
{
__asm__(
" .set push \n"
" .set arch=mips32r2 \n"
" .set nomips16 \n"
" wsbh %0, %1 \n"
" .set pop \n"
: "=r" (x)
@ -32,13 +30,11 @@ static inline __attribute__((nomips16)) __attribute_const__
}
#define __arch_swab16 __arch_swab16
static inline __attribute__((nomips16)) __attribute_const__
__u32 __arch_swab32(__u32 x)
static inline __attribute_const__ __u32 __arch_swab32(__u32 x)
{
__asm__(
" .set push \n"
" .set arch=mips32r2 \n"
" .set nomips16 \n"
" wsbh %0, %1 \n"
" rotr %0, %0, 16 \n"
" .set pop \n"
@ -54,13 +50,11 @@ static inline __attribute__((nomips16)) __attribute_const__
* 64-bit kernel on r2 CPUs.
*/
#ifdef __mips64
static inline __attribute__((nomips16)) __attribute_const__
__u64 __arch_swab64(__u64 x)
static inline __attribute_const__ __u64 __arch_swab64(__u64 x)
{
__asm__(
" .set push \n"
" .set arch=mips64r2 \n"
" .set nomips16 \n"
" dsbh %0, %1 \n"
" dshd %0, %0 \n"
" .set pop \n"