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SCAS/SCASB/SCASW/SCASD -- Compare String Data. Opcode Instruction Clocks Description AE SCAS m8 7 Compare bytes AL-ES:[DI], update (E)DI AF
Opcode, Instruction, Op/En, 64-Bit Mode, Compat/Leg Mode, Description. AE, SCAS m8, NP, Valid, Valid, Compare AL with byte at ES:(E)DI or RDI, then set
The SCAS instruction is used for searching a particular character or set of characters in a string. The data item to be searched should be in AL (for SCASB), AX
SCASB. Compare AL with byte at ES:(E)DI and set status flags. AF. SCASW The SCAS, SCASB, SCASW, and SCASD instructions can be preceded by the REP Intel Architecture Software Developer's Manual. For the latest updates on the
9 Sep 2013 The SCAS instruction is used to scan a string ( SCAS = SCan A String). The Intel manual (Vol. The following “short forms" of the SCAS instruction specify the operand length: SCASB (scan byte string), SCASW (scan word
Opcode, Mnemonic, Description. AE, SCAS m8, Compare AL with byte at ES:(E)DI and set status flags. AF, SCAS m16, Compare AX with word at ES:(E)DI and
6 Nov 2014 back into C. Intel's Instruction Set Reference (Volume 2 of Software Developer's Manual) is invaluable for this kind of reverse engineering. sub ecx, ecx sub al, al not ecx cld repne scasb not ecx dec ecx. Translating to C
SCAS/SCASB/SCASW/SCASD—Scan String. Instruction Operand Encoding. Description. In non-64-bit modes and in default 64-bit mode: this instruction
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