Messages in this thread | | | From | Matteo Croce <> | Subject | [PATCH 0/3] lib/string: optimized mem* functions | Date | Fri, 25 Jun 2021 03:01:57 +0200 |
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From: Matteo Croce <mcroce@microsoft.com>
Rewrite the generic mem{cpy,move,set} so that memory is accessed with the widest size possible, but without doing unaligned accesses.
This was originally posted as C string functions for RISC-V[1], but as there was no specific RISC-V code, it was proposed for the generic lib/string.c implementation.
Tested on RISC-V and on x86_64 by undefining __HAVE_ARCH_MEM{CPY,SET,MOVE} and HAVE_EFFICIENT_UNALIGNED_ACCESS.
Further testing on big endian machines will be appreciated, as I don't have such hardware at the moment.
[1] https://lore.kernel.org/linux-riscv/20210617152754.17960-1-mcroce@linux.microsoft.com/
Matteo Croce (3): lib/string: optimized memcpy lib/string: optimized memmove lib/string: optimized memset
lib/string.c | 129 ++++++++++++++++++++++++++++++++++++++++++++------- 1 file changed, 112 insertions(+), 17 deletions(-)
-- 2.31.1
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