mov BYTE PTR [ebx], 2 ; Move 2 into the single byte at the address stored in EBX.
mov WORD PTR [ebx], 2 ; Move the 16-bit integer representation of 2 into the 2 bytes starting at the address in EBX.
mov DWORD PTR [ebx], 2 ; Move the 32-bit integer representation of 2 into the 4 bytes starting at the address in EBX.
mov QWORD PTR [ebx], 2 ; Move the 64-bit integer representation of 2 into the 8 bytes starting at the address in EBX.
DB ; Declare a byte
DW ; Declare a 2-byte
DD ; Declare a 4-byte value
DQ ; Declare a 8-byte value
fsub dword ptr [ebp]; subtrai ST(0) pelo valor de EBP e salva o resultado em em ST(0)
fld dword ptr [ecx] ; carrega o valor de ecx para st0
fsub dword ptr [ebp] ; subtrai st0 pelo valor de ebp e salva em st0
fstp dword ptr [ebp] ; salva o valor de st0 em ebp
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