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https://github.com/RGBCube/serenity
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Optimize WindowManager::flush() with fast_dword_copy().
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6b4e88b515
commit
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5 changed files with 40 additions and 35 deletions
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@ -13,6 +13,36 @@
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#include <utility>
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#endif
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ALWAYS_INLINE void fast_dword_copy(dword* dest, const dword* src, size_t count)
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{
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#ifdef SERENITY
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asm volatile(
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"rep movsl\n"
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: "=S"(src), "=D"(dest)
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: "S"(src), "D"(dest), "c"(count)
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: "memory"
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);
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#else
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memcpy(dest, src, count * sizeof(dword));
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#endif
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}
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ALWAYS_INLINE void fast_dword_fill(dword* dest, dword value, size_t count)
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{
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#ifdef SERENITY
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asm volatile(
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"rep stosl\n"
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: "=D"(dest)
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: "D"(dest), "c"(count), "a"(value)
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: "memory"
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);
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#else
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for (size_t i = 0; x <= count; ++x) {
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dest[i] = value;
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}
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#endif
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}
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namespace AK {
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template<typename T>
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