Re: Replacing C's memcpy with a D implementation

[solidstate1991 via Digitalmars-d]

On Sunday, 10 June 2018 at 12:49:31 UTC, Mike Franklin wrote:

void memcpyASM()
{
    auto s = src.ptr;
    auto d = dst.ptr;
    size_t len = length;
    asm pure nothrow @nogc
    {
        mov RSI, s;
        mov RDI, d;
        cld;
        mov RCX, len;
        rep;
        movsb;
    }
}

Protip: Use SSE or AVX for an even faster copying.