Author: giuseppe
Date: 09:39:23 11/01/05
hi,
in viusal c++ the the number of opcode of solution 1 is major of code of
solution 2
why sample 1 is more fast of solution 2 ?
unsigned buf
U64 n64
****** solution 1 *******
buf = n64 >> 32;
//the disassembly generated code is this:
//0040AB6A mov ecx,20h
//0040AB6F mov eax,dword ptr [ebp-8]
//0040AB72 mov edx,dword ptr [ebp-4]
//0040AB75 call _aullshr (0040f2c0)
//0040AB7A mov dword ptr [ebp-0Ch],eax
**************************
****** solution 2 ********
__asm{
mov eax, dword ptr n64+04h
mov buf, eax
}
**************************
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Last modified: Thu, 15 Apr 21 08:11:13 -0700
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