1) Implement MOVSX: Write a sequence of shift instructions that cause AX to be sign-extended into...
1) Implement MOVSX: Write a sequence of shift instructions that cause AX to be sign-extended into EAX. In other words, the sign bit of AX is copied into the upper 16 bits of EAX.
example: 8000h in AX results in 0FFFF8000h in EAX
7000h in AX results in 00007000h in EAX
Homework Answers
To understand this problem, we need to understand what does "MOVSX" instruction does.
MOVSX is expanded as move with sign extension. It is a special vesion of MOV instruction along with MOVZX which is move with zero extention. Basically MOVSX is designed to be used for signed register and MOVZX is designed to be used for unsigned register.
In MOVSX data is moved from smaller register and the sign is preserved by either padding with zero(for positive values) or F's (for negative values.
For example:
Taking example given in question;
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1) Implement MOVSX: Write a sequence of shift instructions that
cause AX to be sign-extended into...
assembly language LAB #11-IMPLEMENT SLIDE #56 of the CHAPTER SEVEN SLIDES IN TWO WAYS EBX contains 200; ECX contains 42 1) Using SHIFT INSTRUCTIONS 2) Using the MUL and DIV INSTRUCTIONS Implement...
assembly language
LAB #11-IMPLEMENT SLIDE #56 of the CHAPTER SEVEN SLIDES IN TWO WAYS EBX contains 200; ECX contains 42 1) Using SHIFT INSTRUCTIONS 2) Using the MUL and DIV INSTRUCTIONS Implement the following expression using signed 32-bit integers: eax = (ebx * 20) / ecx mov eax,20 imul ebx idiv ecx
LAB #11-IMPLEMENT SLIDE #56 of the CHAPTER SEVEN SLIDES IN TWO WAYS EBX contains 200; ECX contains 42 1) Using SHIFT INSTRUCTIONS 2) Using the MUL and DIV...
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1. The MIPS instruction set includes several shift instructions. They include logical-shift-left ...
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1. Write a program that will store address information in unique values and
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Example:
Sam Coder
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2. Write a program that will swap the City and State fields and
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Sam Coder
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MO, Kansas City 64018...
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assembly language
LAB #11-IMPLEMENT SLIDE #56 of the CHAPTER SEVEN SLIDES IN TWO WAYS EBX contains 200; ECX contains 42 1) Using SHIFT INSTRUCTIONS 2) Using the MUL and DIV INSTRUCTIONS Implement the following expression using signed 32-bit integers: eax = (ebx * 20) / ecx mov eax,20 imul ebx idiv ecx
LAB #11-IMPLEMENT SLIDE #56 of the CHAPTER SEVEN SLIDES IN TWO WAYS EBX contains 200; ECX contains 42 1) Using SHIFT INSTRUCTIONS 2) Using the MUL and DIV...
2. Serial shift registers Draw missing connections to implement various shift registers 1. Shift right: All bits of the register move right by one position, and a new bit value from a serial input is stored in the most significant bit (leftmost flip-flop below). Serial input -02 az 02 a Do ao Serial indino 2. Shift left: All bits of the register move left by one position, and a new bit value from a serial input is stored in the...
1. The MIPS instruction set includes several shift instructions. They include logical-shift-left (sll), logical-shift-right (srl), and arithmetic-shift-right (sra). [2 +2 4 points] a) Why does not MIPS offer an "arithmetic-shift-left (sla)" instruction? b) Write a MIPS code to implement the logical-shift-left (sll) instruction for a machine that did not have this particular instruction? In other words, you have to write the equivalent of the sll instruction using mul, add and other instructions. Try writing the equivalent of sll Ss1, Ss2,...
A shift operation is often used to implement either multiply-by-power-of-2 or divide-by power-of-2 operations. For example, 0010 x4 1000. This multiplication can be achieved by shifting 0010 by 2 bits to the left. Likewise, 10004 0010, which can be obtained by shifting 1000 to the right by 2 bits. As multipliers are more "expensive" in terms of area and power consumption, multiplication by shifting is preferred if applicable. Sometime, the multiplier does not have to be power-of-2. For example, 0010...
Using the Windows Starter Visual Studio project create the following five programs.
1. Write a program that will store address information in unique values and
then display the full address in a window at runtime (10pts).
Example:
Sam Coder
1 Main Street
Kansas City, MO 64018
2. Write a program that will swap the City and State fields and
then display the full address in a window at runtime (10pts).
Example:
Sam Coder
1 Main Street
MO, Kansas City 64018...
Implement the following statements using MS430 assembly instructions. You may use more than one, but you should minimize the number of instructions required. You can use both native and emulated instructions. Use hex notation for all numbers 1. (a) Move the word located in register R14 to R15 (b) Increment the word in R6 by 2. (c) Perform a bitwise ANDing of the word located at address 0x0240 with the datum in R15, placing the results in R15. (d) Rotate...
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