mirror of
https://github.com/SerenityOS/serenity
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39 lines
944 B
C
39 lines
944 B
C
#pragma once
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#include <AK/Types.h>
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#if defined(KERNEL) || defined(BOOTSTRAPPER)
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# include <LibBareMetal/StdLib.h>
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#else
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# include <stdlib.h>
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# include <string.h>
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#endif
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#if defined(__serenity__) && !defined(KERNEL) && !defined(BOOTSTRAPPER)
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extern "C" void* mmx_memcpy(void* to, const void* from, size_t);
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#endif
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ALWAYS_INLINE void fast_u32_copy(u32* dest, const u32* src, size_t count)
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{
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#if defined(__serenity__) && !defined(KERNEL) && !defined(BOOTSTRAPPER)
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if (count >= 256) {
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mmx_memcpy(dest, src, count * sizeof(count));
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return;
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}
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#endif
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asm volatile(
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"rep movsl\n"
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: "=S"(src), "=D"(dest), "=c"(count)
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: "S"(src), "D"(dest), "c"(count)
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: "memory");
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}
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ALWAYS_INLINE void fast_u32_fill(u32* dest, u32 value, size_t count)
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{
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asm volatile(
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"rep stosl\n"
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: "=D"(dest), "=c"(count)
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: "D"(dest), "c"(count), "a"(value)
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: "memory");
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}
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