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Optimize WindowManager::flush() with fast_dword_copy().

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This commit is contained in:
Andreas Kling 2019-01-12 21:45:45 +01:00
parent 6b4e88b515
commit edc827077e
5 changed files with 40 additions and 35 deletions
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30
AK/StdLibExtras.h
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@ -13,6 +13,36 @@
#include <utility>
#endif
ALWAYS_INLINE void fast_dword_copy(dword* dest, const dword* src, size_t count)
{
#ifdef SERENITY
asm volatile(
"rep movsl\n"
: "=S"(src), "=D"(dest)
: "S"(src), "D"(dest), "c"(count)
: "memory"
);
#else
memcpy(dest, src, count * sizeof(dword));
#endif
}
ALWAYS_INLINE void fast_dword_fill(dword* dest, dword value, size_t count)
{
#ifdef SERENITY
asm volatile(
"rep stosl\n"
: "=D"(dest)
: "D"(dest), "c"(count), "a"(value)
: "memory"
);
#else
for (size_t i = 0; x <= count; ++x) {
dest[i] = value;
}
#endif
}
namespace AK {
template<typename T>