linux/arch/openrisc/include/asm/string.h

#ifndef __ASM_OPENRISC_STRING_H
#define __ASM_OPENRISC_STRING_H

#define __HAVE_ARCH_MEMSET
extern void *memset(void *s, int c, __kernel_size_t n);

#define __HAVE_ARCH_MEMCPY
extern void *memcpy(void *dest, __const void *src, __kernel_size_t n);

#endif /* __ASM_OPENRISC_STRING_H */
openrisc: Add optimized memset This adds a hand-optimized assembler version of memset and sets __HAVE_ARCH_MEMSET to use this version instead of the generic C routine Signed-off-by: Olof Kindgren <olof.kindgren@gmail.com> Signed-off-by: Stafford Horne <shorne@gmail.com> 2015-02-06 20:41:51 +08:00			`#ifndef __ASM_OPENRISC_STRING_H`
			`#define __ASM_OPENRISC_STRING_H`

			`#define __HAVE_ARCH_MEMSET`
			`extern void memset(void s, int c, __kernel_size_t n);`

openrisc: Add optimized memcpy routine The generic memcpy routine provided in kernel does only byte copies. Using word copies we can lower boot time and cycles spend in memcpy quite significantly. Booting on my de0 nano I see boot times go from 7.2 to 5.6 seconds. The avg cycles in memcpy during boot go from 6467 to 1887. I tested several algorithms (see code in previous patch mails) The implementations I tested and avg cycles: - Word Copies + Loop Unrolls + Non Aligned 1882 - Word Copies + Loop Unrolls 1887 - Word Copies 2441 - Byte Copies + Loop Unrolls 6467 - Byte Copies 7600 In the end I ended up going with Word Copies + Loop Unrolls as it provides best tradeoff between simplicity and boot speedups. Signed-off-by: Stafford Horne <shorne@gmail.com> 2016-03-21 15:16:46 +08:00			`#define __HAVE_ARCH_MEMCPY`
			`extern void memcpy(void dest, __const void *src, __kernel_size_t n);`

openrisc: Add optimized memset This adds a hand-optimized assembler version of memset and sets __HAVE_ARCH_MEMSET to use this version instead of the generic C routine Signed-off-by: Olof Kindgren <olof.kindgren@gmail.com> Signed-off-by: Stafford Horne <shorne@gmail.com> 2015-02-06 20:41:51 +08:00			`#endif /* __ASM_OPENRISC_STRING_H */`