calc_spd.asm

public calculate_xors
public calculate_xchgs
public get_cpuinfo

.data
real_num    dd 0

.code
calculate_xors proc
    xor r8, r8
    xor r9, r9

    rdtsc
    or r8, rdx
    shl r8, 32
    or r8, rax

    mov rcx, 10000

loopmark:
    xor r9, r8
    xor r8, r9
    xor r9, r8
    xor r9, r8
    xor r8, r9
    xor r9, r8
    xor r9, r8
    xor r8, r9
    xor r9, r8
    xor r9, r8
    xor r8, r9
    xor r9, r8

    xor r9, r8
    xor r8, r9
    xor r9, r8
    xor r9, r8
    xor r8, r9
    xor r9, r8
    xor r9, r8
    xor r8, r9
    xor r9, r8
    xor r9, r8
    xor r8, r9
    xor r9, r8

    loop loopmark

    rdtsc
    or r9, rdx
    shl r9, 32
    or r9, rax

    mov rax, r9
    sub rax, r8

    ret
calculate_xors endp

calculate_xchgs proc
    xor r8, r8
    xor r9, r9

    rdtsc
    or r8, rdx
    shl r8, 32
    or r8, rax

    mov rcx, 10000

loopmark:
    xchg r8, r9
    xchg r8, r9
    xchg r8, r9
    xchg r8, r9

    xchg r8, r9
    xchg r8, r9
    xchg r8, r9
    xchg r8, r9

    loop loopmark

    rdtsc
    or r9, rdx
    shl r9, 32
    or r9, rax

    mov rax, r9
    sub rax, r8

    ret
calculate_xchgs endp

get_cpuinfo proc
    push rax

    mov r8, rcx

    mov eax, 80000002h
    cpuid

    mov [r8+0], eax
    mov [r8+4], ebx
    mov [r8+8], ecx
    mov [r8+12], edx
    add r8, 16

    mov eax, 80000003h
    cpuid

    mov [r8+0], eax
    mov [r8+4], ebx
    mov [r8+8], ecx
    mov [r8+12], edx
    add r8, 16

    mov eax, 80000004h
    cpuid

    mov [r8+0], eax
    mov [r8+4], ebx
    mov [r8+8], ecx
    mov [r8+12], edx
    add r8, 16

    pop rax
    ret
get_cpuinfo endp
end