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MIPS: Use WSBH/DSBH/DSHD on Loongson 3A

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Signed-off-by: chenj <chenj@lemote.com>
Cc: linux-mips@linux-mips.org
Cc: chenhc@lemote.com
Patchwork: https://patchwork.linux-mips.org/patch/7542/
Patchwork: https://patchwork.linux-mips.org/patch/7550/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Chen Jie
2014-08-15 16:56:58 +08:00
committed by Ralf Baechle
parent 0f33be009b
commit 3c09bae43b
6 changed files with 36 additions and 7 deletions
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18
arch/mips/include/uapi/asm/swab.h
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@@ -13,12 +13,16 @@
#define __SWAB_64_THRU_32__
#if defined(__mips_isa_rev) && (__mips_isa_rev >= 2)
#if (defined(__mips_isa_rev) && (__mips_isa_rev >= 2)) || \
defined(_MIPS_ARCH_LOONGSON3A)
static inline __attribute_const__ __u16 __arch_swab16(__u16 x)
{
__asm__(
" .set push \n"
" .set arch=mips32r2 \n"
" wsbh %0, %1 \n"
" .set pop \n"
: "=r" (x)
: "r" (x));
@@ -29,8 +33,11 @@ static inline __attribute_const__ __u16 __arch_swab16(__u16 x)
static inline __attribute_const__ __u32 __arch_swab32(__u32 x)
{
__asm__(
" .set push \n"
" .set arch=mips32r2 \n"
" wsbh %0, %1 \n"
" rotr %0, %0, 16 \n"
" .set pop \n"
: "=r" (x)
: "r" (x));
@@ -46,8 +53,11 @@ static inline __attribute_const__ __u32 __arch_swab32(__u32 x)
static inline __attribute_const__ __u64 __arch_swab64(__u64 x)
{
__asm__(
" dsbh %0, %1\n"
" dshd %0, %0"
" .set push \n"
" .set arch=mips64r2 \n"
" dsbh %0, %1 \n"
" dshd %0, %0 \n"
" .set pop \n"
: "=r" (x)
: "r" (x));
@@ -55,5 +65,5 @@ static inline __attribute_const__ __u64 __arch_swab64(__u64 x)
}
#define __arch_swab64 __arch_swab64
#endif /* __mips64 */
#endif /* MIPS R2 or newer */
#endif /* MIPS R2 or newer or Loongson 3A */
#endif /* _ASM_SWAB_H */