
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Which instruction shifts each bit in an operand to the left and copies the highest bit into both
the Carry flag and the lowest bit position?
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- Suppose the register %rax contains 0x100, and the register %rbx contains 0x10. What value is stored in %rcx as a result of movq 2(%rax,%rbx,4), %rcx?arrow_forwardDesigning a mask for bit manipulation allows us to clear, set, invert, and extract the selected bits in the bit string. Applying bitwise operations AND, OR, XOR, NOT, SHL, SHR, ROL, and ROR allow us to pack and unpack bits in the bit string. In the following instructions below illustrates how bits are being "packed" and "unpacked" from/to the bit string to the 16-bits registers AX/BX, what would be the final bit string value loaded to the memory variable "unpackedData" from the 16-bit register BX?arrow_forward2. Memory contents (in hexadecimal) are 0005, 0001, 0123 for addresses 000 to 002, then 2002, 1000, 7800, F400 for addresses 80A through 80D. AC starts with value 0F24, PC has the value 80A, and AR has the value 4F5. Starting with time-step T0, describe what happens until the next TO. Make sure to indicate any updated register values as they happen. (Assume R= 0.) Refer to table 5.6 from Mano's textbook. F24 1 ARarrow_forward
- Which instruction causes the highest bit in each operand to be cloned into the Carry flag and the lowest bit position, and each operand's bits to be moved to the left?arrow_forwardWrite the MIPS instructions for the following problems using arithmetic and shift instructions. Using a shift operation, write the MIPS code that divides the number in $t0=256 by 8.arrow_forwardWhich instruction causes each bit in an operand to be moved one place to the left, and furthermore causes the highest bit in each operand to be copied into the Carry flag in addition to the bit position containing the lowest bit?arrow_forward
- Use the following data declarations. Assume that the offset of byte Val is 00000000: .data byte Val sbyte 1,2,3.-7h word Val word 1000h.2000h 3000h, 4000h dwordVal dword 34567890h, 90785634h, 1234674Sh Show the value of the final destination operand after each of the following code fragments has executed: (If any instructions is invalid, indicate "INV" as the answer and briefly explain why) a. moy di 2 mov al, byte Val[di] b. mov bx, word Val mov esi, offset wordVal+4 xchg bx, [esi] R c. movsx cx, byte Val+3 d. mov ax, word ptr [dwordVal mov bl. byte ptr [dwordVal +10] e. mov al, 80h number add al 40h signed ;signed number answer al-= answer bx= answer (show your answer in binary) CX- answer |esi= answer bl= SF=arrow_forwardWhich instruction shifts each bit to the right by copying the lowest bit into the Carry flag and the Carry flag into the highest bit position?arrow_forwardDesigning a mask for bit manipulation allows us to clear, set, invert, and extract the selected bits in the bit string. Applying bitwise operations AND, OR, XOR, NOT, SHL, SHR, ROL, and ROR allow us to pack and unpack bits in the bit string. In the following instructions below illustrates how bits are being "packed" and "unpacked" from/to the bit string to the 16-bits registers AX/BX, what would be the final bit string value loaded to the memory variable "unpackedData" from the 16-bit register BX? MOV EAX, 0 MOV EBX, 0 MOV AX, 0X47E3 MOV packedData, AX MOV BX, packedData AND BX, 0XE000 ROL BX, 4 MOV unpackedData, BXarrow_forward
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