#define SecureZeroMemory RtlSecureZeroMemory

FORCEINLINE
PVOID
RtlSecureZeroMemory(
    IN PVOID ptr,
    IN SIZE_T cnt
    )
{
    volatile char *vptr = (volatile char *)ptr;

#if defined(_M_AMD64)

        __stosb((PBYTE )((DWORD64)vptr), 0, cnt);

#else

    while (cnt) {
        *vptr = 0;
        vptr++;
        cnt--;
    }

#endif

    return ptr;
}

.text:7849AF16                 align 10h
.text:7849AF20 ; Exported entry 692. RtlZeroMemory
.text:7849AF20
.text:7849AF20 ; ¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦ S U B R O U T I N E ¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦¦
.text:7849AF20
.text:7849AF20
.text:7849AF20                 public RtlZeroMemory
.text:7849AF20 RtlZeroMemory   proc near
.text:7849AF20
.text:7849AF20 arg_0           = dword ptr  8
.text:7849AF20 arg_4           = dword ptr  0Ch
.text:7849AF20
.text:7849AF20                 push    edi
.text:7849AF21                 mov     edi, [esp+arg_0]
.text:7849AF25                 mov     ecx, [esp+arg_4]
.text:7849AF29                 xor     eax, eax
.text:7849AF2B                 cld
.text:7849AF2C                 mov     edx, ecx
.text:7849AF2E                 and     edx, 3
.text:7849AF31                 shr     ecx, 2
.text:7849AF34                 rep stosd
.text:7849AF36                 or      ecx, edx
.text:7849AF38                 jnz     short loc_7849AF3E
.text:7849AF3A                 pop     edi
.text:7849AF3B                 retn    8
.text:7849AF3E ; ---------------------------------------------------------------------------
.text:7849AF3E
.text:7849AF3E loc_7849AF3E:                           ; CODE XREF: RtlZeroMemory+18j
.text:7849AF3E                 rep stosb
.text:7849AF40                 pop     edi
.text:7849AF41                 retn    8
.text:7849AF41 RtlZeroMemory   endp

	
	
memset in msvcrt.dll

.text:78001A1D ; void *__cdecl memset(void *,int,size_t)
.text:78001A1D                 public _memset
.text:78001A1D _memset         proc near               ; CODE XREF: ___crtGetStringTypeA+C1p
.text:78001A1D                                         ; .text:78009873p ...
.text:78001A1D                 mov     edx, [esp+0Ch]
.text:78001A21                 mov     ecx, [esp+4]
.text:78001A25                 test    edx, edx
.text:78001A27                 jz      loc_780107B7
.text:78001A2D                 xor     eax, eax
.text:78001A2F                 mov     al, [esp+8]
.text:78001A33                 push    edi
.text:78001A34                 mov     edi, ecx
.text:78001A36                 cmp     edx, 4
.text:78001A39                 jb      loc_780107AB
.text:78001A3F                 neg     ecx
.text:78001A41                 and     ecx, 3
.text:78001A44                 jnz     loc_7801079D
.text:78001A4A
.text:78001A4A loc_78001A4A:                           ; CODE XREF: .text:780107A3j
.text:78001A4A                 mov     ecx, eax
.text:78001A4C                 shl     eax, 8
.text:78001A4F                 add     eax, ecx
.text:78001A51                 mov     ecx, eax
.text:78001A53                 shl     eax, 10h
.text:78001A56                 add     eax, ecx
.text:78001A58                 mov     ecx, edx
.text:78001A5A                 and     edx, 3
.text:78001A5D                 shr     ecx, 2
.text:78001A60                 jz      loc_780107AB
.text:78001A66                 rep stosd
.text:78001A68                 test    edx, edx
.text:78001A6A                 jnz     loc_780107AB
.text:78001A70
.text:78001A70 loc_78001A70:                           ; CODE XREF: .text:780107AFj
.text:78001A70                 mov     eax, [esp+8]
.text:78001A74                 pop     edi
.text:78001A75                 retn
.text:78001A75 _memset         endp