andrius
/
arm-trusted-firmware
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Merge "libc: memset: Fix MISRA issues" into integration

This commit is contained in:
Joanna Farley 2021-02-24 10:59:26 +00:00 committed by TrustedFirmware Code Review
parent 0125b42e95 005415a39a
commit b852f2c35c
1 changed files with 14 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
lib/libc/memset.c
View File

@ -10,19 +10,20 @@
void *memset(void *dst, int val, size_t count)
{
char *ptr = dst;
uint8_t *ptr = dst;
uint64_t *ptr64;
uint64_t fill = (unsigned char)val;
/* Simplify code below by making sure we write at least one byte. */
if (count == 0) {
if (count == 0U) {
return dst;
}
/* Handle the first part, until the pointer becomes 64-bit aligned. */
while (((uintptr_t)ptr & 7)) {
*ptr++ = val;
if (--count == 0) {
while (((uintptr_t)ptr & 7U) != 0U) {
*ptr = (uint8_t)val;
ptr++;
if (--count == 0U) {
return dst;
}
}
@ -33,15 +34,17 @@ void *memset(void *dst, int val, size_t count)
fill |= fill << 32;
/* Use 64-bit writes for as long as possible. */
ptr64 = (void *)ptr;
for (; count >= 8; count -= 8) {
*ptr64++ = fill;
ptr64 = (uint64_t *)ptr;
for (; count >= 8U; count -= 8) {
*ptr64 = fill;
ptr64++;
}
/* Handle the remaining part byte-per-byte. */
ptr = (void *)ptr64;
while (count--) {
*ptr++ = val;
ptr = (uint8_t *)ptr64;
while (count-- > 0U) {
*ptr = (uint8_t)val;
ptr++;
}
return dst;