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Everywhere: Make the codebase more architecture aware

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Undefine 2022-07-22 20:48:24 +02:00 • committed by Brian Gianforcaro
parent 6c4b5775e1
commit 97cc33ca47
22 changed files with 108 additions and 36 deletions
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10
Userland/Libraries/LibC/string.cpp
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@ -130,17 +130,19 @@ int timingsafe_memcmp(void const* b1, void const* b2, size_t len)
// https://pubs.opengroup.org/onlinepubs/9699919799/functions/memcpy.html
void* memcpy(void* dest_ptr, void const* src_ptr, size_t n)
{
#if ARCH(I386) || ARCH(X86_64)
void* original_dest = dest_ptr;
asm volatile(
"rep movsb"
: "+D"(dest_ptr), "+S"(src_ptr), "+c"(n)::"memory");
return original_dest;
#else
# error Unknown architecture
#endif
}
#if ARCH(I386)
// https://pubs.opengroup.org/onlinepubs/9699919799/functions/memset.html
//
// For x86-64, an optimized ASM implementation is found in ./arch/x86_64/memset.S
void* memset(void* dest_ptr, int c, size_t n)
{
size_t dest = (size_t)dest_ptr;
@ -164,6 +166,10 @@ void* memset(void* dest_ptr, int c, size_t n)
: "memory");
return dest_ptr;
}
#elif ARCH(X86_64)
// For x86-64, an optimized ASM implementation is found in ./arch/x86_64/memset.S
#else
# error Unknown architecture
#endif
// https://pubs.opengroup.org/onlinepubs/9699919799/functions/memmove.html