Function _memcpy

js/sql-debug.js:397752–397822

(dest, src, num)

    return (((x&0xff)<<24) | (((x>>8)&0xff)<<16) | (((x>>16)&0xff)<<8) | (x>>>24))|0;
}
function _memcpy(dest, src, num) {
    dest = dest|0; src = src|0; num = num|0;
    var ret = 0;
    var aligned_dest_end = 0;
    var block_aligned_dest_end = 0;
    var dest_end = 0;
    // Test against a benchmarked cutoff limit for when HEAPU8.set() becomes faster to use.
    if ((num|0) >=
      8192
    ) {
      return _emscripten_memcpy_big(dest|0, src|0, num|0)|0;
    }

    ret = dest|0;
    dest_end = (dest + num)|0;
    if ((dest&3) == (src&3)) {
      // The initial unaligned < 4-byte front.
      while (dest & 3) {
        if ((num|0) == 0) return ret|0;
        HEAP8[((dest)>>0)]=((HEAP8[((src)>>0)])|0);
        dest = (dest+1)|0;
        src = (src+1)|0;
        num = (num-1)|0;
      }
      aligned_dest_end = (dest_end & -4)|0;
      block_aligned_dest_end = (aligned_dest_end - 64)|0;
      while ((dest|0) <= (block_aligned_dest_end|0) ) {
        HEAP32[((dest)>>2)]=((HEAP32[((src)>>2)])|0);
        HEAP32[(((dest)+(4))>>2)]=((HEAP32[(((src)+(4))>>2)])|0);
        HEAP32[(((dest)+(8))>>2)]=((HEAP32[(((src)+(8))>>2)])|0);
        HEAP32[(((dest)+(12))>>2)]=((HEAP32[(((src)+(12))>>2)])|0);
        HEAP32[(((dest)+(16))>>2)]=((HEAP32[(((src)+(16))>>2)])|0);
        HEAP32[(((dest)+(20))>>2)]=((HEAP32[(((src)+(20))>>2)])|0);
        HEAP32[(((dest)+(24))>>2)]=((HEAP32[(((src)+(24))>>2)])|0);
        HEAP32[(((dest)+(28))>>2)]=((HEAP32[(((src)+(28))>>2)])|0);
        HEAP32[(((dest)+(32))>>2)]=((HEAP32[(((src)+(32))>>2)])|0);
        HEAP32[(((dest)+(36))>>2)]=((HEAP32[(((src)+(36))>>2)])|0);
        HEAP32[(((dest)+(40))>>2)]=((HEAP32[(((src)+(40))>>2)])|0);
        HEAP32[(((dest)+(44))>>2)]=((HEAP32[(((src)+(44))>>2)])|0);
        HEAP32[(((dest)+(48))>>2)]=((HEAP32[(((src)+(48))>>2)])|0);
        HEAP32[(((dest)+(52))>>2)]=((HEAP32[(((src)+(52))>>2)])|0);
        HEAP32[(((dest)+(56))>>2)]=((HEAP32[(((src)+(56))>>2)])|0);
        HEAP32[(((dest)+(60))>>2)]=((HEAP32[(((src)+(60))>>2)])|0);
        dest = (dest+64)|0;
        src = (src+64)|0;
      }
      while ((dest|0) < (aligned_dest_end|0) ) {
        HEAP32[((dest)>>2)]=((HEAP32[((src)>>2)])|0);
        dest = (dest+4)|0;
        src = (src+4)|0;
      }
    } else {
      // In the unaligned copy case, unroll a bit as well.
      aligned_dest_end = (dest_end - 4)|0;
      while ((dest|0) < (aligned_dest_end|0) ) {
        HEAP8[((dest)>>0)]=((HEAP8[((src)>>0)])|0);
        HEAP8[(((dest)+(1))>>0)]=((HEAP8[(((src)+(1))>>0)])|0);
        HEAP8[(((dest)+(2))>>0)]=((HEAP8[(((src)+(2))>>0)])|0);