Guillaume Chatelet 67437dd014 [reland][libc] Switch to new implementation of mem* functions
The new framework makes it explicit which processor feature is being
used and allows for easier per platform customization:
 - ARM cpu now uses trivial implementations to reduce code size.
 - Memcmp, Bcmp and Memmove have been optimized for x86
 - Bcmp has been optimized for aarch64.

This is a reland of https://reviews.llvm.org/D135134 (b3f1d58, 028414881381)

Reviewed By: courbet

Differential Revision: https://reviews.llvm.org/D136595
2022-11-02 09:09:46 +00:00

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//===-- Implementation of memcmp ------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "src/string/memcmp.h"
#include "src/string/memory_utils/memcmp_implementations.h"
#include <stddef.h> // size_t
namespace __llvm_libc {
LLVM_LIBC_FUNCTION(int, memcmp,
(const void *lhs, const void *rhs, size_t count)) {
return inline_memcmp(lhs, rhs, count);
}
} // namespace __llvm_libc