diff options
| author | Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> | 2017-03-27 22:37:40 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-08-17 16:04:35 +0300 |
| commit | 694fc88ce271fd48f7939c032c1247fef81db57f (patch) | |
| tree | 13473e23faddb19b97ef49d8a89cee65a584e8f1 /arch/powerpc | |
| parent | 00e7c259e9c44f414ead5fc9bb3c459d8235045c (diff) | |
| download | linux-694fc88ce271fd48f7939c032c1247fef81db57f.tar.xz | |
powerpc/string: Implement optimized memset variants
Based on Matthew Wilcox's patches for other architectures.
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/include/asm/string.h | 24 | ||||
| -rw-r--r-- | arch/powerpc/lib/mem_64.S | 19 |
2 files changed, 42 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/string.h b/arch/powerpc/include/asm/string.h index da3cdffca440..b0e82466d4e8 100644 --- a/arch/powerpc/include/asm/string.h +++ b/arch/powerpc/include/asm/string.h @@ -23,6 +23,30 @@ extern void * memmove(void *,const void *,__kernel_size_t); extern int memcmp(const void *,const void *,__kernel_size_t); extern void * memchr(const void *,int,__kernel_size_t); +#ifdef CONFIG_PPC64 +#define __HAVE_ARCH_MEMSET16 +#define __HAVE_ARCH_MEMSET32 +#define __HAVE_ARCH_MEMSET64 + +extern void *__memset16(uint16_t *, uint16_t v, __kernel_size_t); +extern void *__memset32(uint32_t *, uint32_t v, __kernel_size_t); +extern void *__memset64(uint64_t *, uint64_t v, __kernel_size_t); + +static inline void *memset16(uint16_t *p, uint16_t v, __kernel_size_t n) +{ + return __memset16(p, v, n * 2); +} + +static inline void *memset32(uint32_t *p, uint32_t v, __kernel_size_t n) +{ + return __memset32(p, v, n * 4); +} + +static inline void *memset64(uint64_t *p, uint64_t v, __kernel_size_t n) +{ + return __memset64(p, v, n * 8); +} +#endif #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_STRING_H */ diff --git a/arch/powerpc/lib/mem_64.S b/arch/powerpc/lib/mem_64.S index 85fa9869aec5..ec531de99996 100644 --- a/arch/powerpc/lib/mem_64.S +++ b/arch/powerpc/lib/mem_64.S @@ -13,6 +13,23 @@ #include <asm/ppc_asm.h> #include <asm/export.h> +_GLOBAL(__memset16) + rlwimi r4,r4,16,0,15 + /* fall through */ + +_GLOBAL(__memset32) + rldimi r4,r4,32,0 + /* fall through */ + +_GLOBAL(__memset64) + neg r0,r3 + andi. r0,r0,7 + cmplw cr1,r5,r0 + b .Lms +EXPORT_SYMBOL(__memset16) +EXPORT_SYMBOL(__memset32) +EXPORT_SYMBOL(__memset64) + _GLOBAL(memset) neg r0,r3 rlwimi r4,r4,8,16,23 @@ -20,7 +37,7 @@ _GLOBAL(memset) rlwimi r4,r4,16,0,15 cmplw cr1,r5,r0 /* do we get that far? */ rldimi r4,r4,32,0 - PPC_MTOCRF(1,r0) +.Lms: PPC_MTOCRF(1,r0) mr r6,r3 blt cr1,8f beq+ 3f /* if already 8-byte aligned */ |