difference between shr and sar
shr instruction in 8086 example
shift arithmetic left
shift instruction in assembly language
x86 cl
sar eax, 1
shr instruction example
sar %eax
Shift Instructions; SHL and SHR Shift Instructions; Shift Instructions Examples; Rotate Instructions; ROL and ROR, Rotate Without Carry; RCL and RCR, Rotate Documentation Home > x86 Assembly Language Reference Manual > Chapter 2 Instruction-Set Mapping > Arithmetic Logical Instructions > Shift (sal, shl, sar, Looks like the dissembler used short-hand for SAR EAX,1 which has an opcode of an opcode of 0xD1F8 . when the immediate is not 1, aka SAR EAX,xx , the opcode is 0xC1F8 xx , see the Intel Instruction reference, Vol. In an arithmetic shift (also referred to as signed shift), like a logical shift, the bits that slide off the end disappear Opcode, Mnemonic, Description. D0 /4, SAL r/m8, Multiply r/m8 by 2, 1 time. D2 /4, SAL r/m8,CL, Multiply r/m8 by 2, CL times. C0 /4 ib, SAL r/m8,imm8, Multiply The x86 instruction set refers to the set of instructions that x86-compatible microprocessors . SAR, Shift Arithmetically right (signed shift right), (1) (signed) r/m >>= 1; (2) (signed) r/m >>= CL;. SBB, Subtraction with borrow, alternative 1-byte x86 Instruction Set Reference. Derived from the .. PSRAW, Shift Packed Data Right Arithmetic. PSRLD, Shift PSRLDQ, Shift Double Quadword Right Logical. 17 Aug 2016 The shr or sar instruction is used to shift the bits of the operand destination to the right, by the number of bits specified in the count operand. 29 Sep 2011
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