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005415a39a
MISRA complained about "0"s not being followed by an "U" (please note my protest about this!) and about values not being explicitly compared to 0 (fair enough). Also use explicit pointer types. Fix those issues to make the CI happy. Change-Id: I4d11e49c14f16223a71c78b0fc3e68ba9a1382d3 Signed-off-by: Andre Przywara <andre.przywara@arm.com>
51 lines
1 KiB
C
51 lines
1 KiB
C
/*
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* Copyright (c) 2013-2020, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <stddef.h>
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#include <string.h>
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#include <stdint.h>
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void *memset(void *dst, int val, size_t count)
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{
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uint8_t *ptr = dst;
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uint64_t *ptr64;
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uint64_t fill = (unsigned char)val;
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/* Simplify code below by making sure we write at least one byte. */
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if (count == 0U) {
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return dst;
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}
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/* Handle the first part, until the pointer becomes 64-bit aligned. */
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while (((uintptr_t)ptr & 7U) != 0U) {
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*ptr = (uint8_t)val;
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ptr++;
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if (--count == 0U) {
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return dst;
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}
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}
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/* Duplicate the fill byte to the rest of the 64-bit word. */
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fill |= fill << 8;
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fill |= fill << 16;
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fill |= fill << 32;
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/* Use 64-bit writes for as long as possible. */
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ptr64 = (uint64_t *)ptr;
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for (; count >= 8U; count -= 8) {
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*ptr64 = fill;
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ptr64++;
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}
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/* Handle the remaining part byte-per-byte. */
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ptr = (uint8_t *)ptr64;
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while (count-- > 0U) {
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*ptr = (uint8_t)val;
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ptr++;
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}
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return dst;
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}
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