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Kernel/LibC: Make memset implementations the same

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I dont know why we do a fast path in the Kernel, but not in Userspace

Also simplified the byte explosion in memset to "explode_byte"
it even seemed so, that we missed the highest byte when memseting something
This commit is contained in:
Hendiadyoin1 2021-04-07 15:11:13 +02:00 • committed by Andreas Kling
parent 74de4795dc
commit e8ef10e2a6
2 changed files with 18 additions and 7 deletions
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4
Kernel/StdLib.cpp
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@ -282,9 +282,7 @@ void* memset(void* dest_ptr, int c, size_t n)
// FIXME: Support starting at an unaligned address.
if (!(dest & 0x3) && n >= 12) {
size_t size_ts = n / sizeof(size_t);
size_t expanded_c = (u8)c;
expanded_c |= expanded_c << 8;
expanded_c |= expanded_c << 16;
size_t expanded_c = explode_byte((u8)c);
asm volatile(
"rep stosl\n"
: "=D"(dest)