Homework Answers
After the execution of the instruction "add r1, r2", the result will be:
R1 = 0x00000001
R2 = 0x2
Negative(N) flag = 0 (Not Set as MSB bit of result is zero)
Overflow(V) flag = 1 (Set i.e., overflow occurred)
Add Answer to:
4. (5 marks) Suppose that r1=0xffffffff and r2=0x2. After an "add ri, r2" instruction in Thumb-2...
Section B - ARM Assembly Language (25 marks) An ARM instruction set summary is provided at...
Section B - ARM Assembly Language (25 marks) An ARM instruction set summary is provided at the end of this paper 1. (5 marks) Consider the following assembly instruction STMFD r13!, (r5-6} Before executing this instruction, registers hold the following values: Register Value Register r9 Value r4 0x00400040 0x00000000 r5 r10 0x11223344 0x00800080 r6 0x55667788 r11 0x10001000 r7 0x99aabbcc r12 0x20002000 r8 exddeeff00 r13 ex40004000 What memory locations are affected after executing the above instruction? In a table, with a...
Exercise 1 (9 pts) We have seen that ARM has 16*32 bits registers (plus floating point...
Exercise 1 (9 pts) We have seen that ARM has 16*32 bits registers (plus floating point registers) There is also a status register: CPSR. It contains, among other things, the following important status bits N Negative, set when the result of an arithmetic operation is negative (according to the two's complement encoding of the natural numbers . Z- Zero, set when the result of an operation is zero . C Carry, set when an operation results in a carry bit...
3) (5) What value will the carry flag contain after these instructions: a) MOV R1,#3 MOVS...
3) (5) What value will the carry flag contain after these instructions: a) MOV R1,#3 MOVS R2, R1, LSR #1 b) MOV R1,#2 MOVS R2, R1, LSR #1 4) (5) Will this instruction update the flags in the CPSR? ADD R1, R0, #1 Alo it Why or why not?
A C program has been compiled into the Atmel AVR assembly language. The following instruction, which...
A C program has been compiled into the Atmel AVR assembly
language. The following instruction, which is located at address
0x002A, is executed:
i.) What is the binary value contained in the instruction
register (IR) when the instruction is executed?
ii.) What is the hexadecimal value of the program counter (PC)
when the instruction is executed?
iii.) If register r1 = 0x40 and register r2 = 0x02 prior to
executing the instruction, what are the contents of r1 and r2...
Assembly lang multiple choice Suppose we have the following pseudo-instruction in our program: push {r0, r2,...
Assembly lang multiple choice Suppose we have the following pseudo-instruction in our program: push {r0, r2, r4} ..... Which of the following instructions would be the appropriate instruction to use when cleaning up the stack space used by the three register values that were pushed onto the stack? Group of answer choices sub sp, #12 add sp, #12 add lr, #12 2) Suppose we are comparing registers R1 and R2 and we want to branch if equal to the label...
Question 2 ARM Assembly Language (25 marks) An ARM instruction set summary is provided at the...
Question 2 ARM Assembly Language (25 marks) An ARM instruction set summary is provided at the end of this paper. (5 marks) Explain the difference between eor and eors instruction. Use an example to show why both forms are useful. а. b. (5 marks) Explain using an example what the "Idr r3, [r7,#4]" instruction does. c. (10 marks) The following is the assembly language generated by a C compile type mystery, %function mystery: args 0, pretend = 0, frame =...
Page 4 3. Pipeline is an instruction-level parallel processing techni microprocessor systems. The instruction throughput can be dramaticallu increased by this key technique. However, there are so...
Page 4 3. Pipeline is an instruction-level parallel processing techni microprocessor systems. The instruction throughput can be dramaticallu increased by this key technique. However, there are so called hazard problems. (a) Branch instruction will introduce problems to a pipelined instruction execution. Explain how this may happen in a DLX machine, and state ONE strategy that can be used to resolve the problem (6 marks) (b) Data hazards occur in instruction execution in a pipelined machine. () What is meant by...
Q4 (10 marks): What are the values in registers R1, R2 and R3 at the end...
Q4 (10 marks): What are the values in registers R1, R2 and R3 at the end of this ARMv7 assembly program? MOV R1, #2 MOV R2, #10 MOV R3, #10 L1: CMP R1, R3 BGE L3 BL L2 ADD R1, R1, #3 BL1 L2: ADD R2, R2, #3 MOV R15, R14 L3: MUL R3, R1, R2 Q5 (10 marks): Please write ARMv7 assembly program for following C programs. Assume that variables are stored in memory and their addresses can be...
ASSEMBLY CODE NEED ASAP WILL RATE RIGHT AWAY all Verizon 6:48 PM What will r2 contain...
ASSEMBLY CODE NEED ASAP WILL RATE RIGHT AWAY
all Verizon 6:48 PM What will r2 contain after the execution of the following instructions assuming that the instructions are executed independently? given that initially r2=0XFFFFFFFF r1=0xFF00FF00 and r0= 0xF7 1) MVN r2, 0x7E000000 2) EOR r2,rO,r1; 3) ROR r2,ro,#2; 4)MLA r2,r2,r2,rO 5) RRX, r2,r& initial carry flag =1 6) MOV r2,(14<<3) 7)ASR r2,r1,#1 8)LSL r2,r1,#3 9) LAR r2,r1,#3
Consider the following operations: A B- C The corresponding assembly code instruction list generated by a compiler are 1 load [%r0 +4], %r1 2 load [%r0 + 8], %r2 3 sub %r1, %r2,%r3 4 load [ZrO + 1...
Consider the following operations: A B- C The corresponding assembly code instruction list generated by a compiler are 1 load [%r0 +4], %r1 2 load [%r0 + 8], %r2 3 sub %r1, %r2,%r3 4 load [ZrO + 12], %r4 5 add %r3, %r4 , %r5 6 store %r3, [%r0 + 16] 7 store %r5, [%r0 + 20] a) Identify the potential pipeline hazards. (10 points) b) State if the found hazards can be eliminated and if so propose a scheme...
Section B - ARM Assembly Language (25 marks) An ARM instruction set summary is provided at the end of this paper 1. (5 marks) Consider the following assembly instruction STMFD r13!, (r5-6} Before executing this instruction, registers hold the following values: Register Value Register r9 Value r4 0x00400040 0x00000000 r5 r10 0x11223344 0x00800080 r6 0x55667788 r11 0x10001000 r7 0x99aabbcc r12 0x20002000 r8 exddeeff00 r13 ex40004000 What memory locations are affected after executing the above instruction? In a table, with a...
Exercise 1 (9 pts) We have seen that ARM has 16*32 bits registers (plus floating point registers) There is also a status register: CPSR. It contains, among other things, the following important status bits N Negative, set when the result of an arithmetic operation is negative (according to the two's complement encoding of the natural numbers . Z- Zero, set when the result of an operation is zero . C Carry, set when an operation results in a carry bit...
3) (5) What value will the carry flag contain after these instructions: a) MOV R1,#3 MOVS R2, R1, LSR #1 b) MOV R1,#2 MOVS R2, R1, LSR #1 4) (5) Will this instruction update the flags in the CPSR? ADD R1, R0, #1 Alo it Why or why not?
A C program has been compiled into the Atmel AVR assembly
language. The following instruction, which is located at address
0x002A, is executed:
i.) What is the binary value contained in the instruction
register (IR) when the instruction is executed?
ii.) What is the hexadecimal value of the program counter (PC)
when the instruction is executed?
iii.) If register r1 = 0x40 and register r2 = 0x02 prior to
executing the instruction, what are the contents of r1 and r2...
Question 2 ARM Assembly Language (25 marks) An ARM instruction set summary is provided at the end of this paper. (5 marks) Explain the difference between eor and eors instruction. Use an example to show why both forms are useful. а. b. (5 marks) Explain using an example what the "Idr r3, [r7,#4]" instruction does. c. (10 marks) The following is the assembly language generated by a C compile type mystery, %function mystery: args 0, pretend = 0, frame =...
Page 4 3. Pipeline is an instruction-level parallel processing techni microprocessor systems. The instruction throughput can be dramaticallu increased by this key technique. However, there are so called hazard problems. (a) Branch instruction will introduce problems to a pipelined instruction execution. Explain how this may happen in a DLX machine, and state ONE strategy that can be used to resolve the problem (6 marks) (b) Data hazards occur in instruction execution in a pipelined machine. () What is meant by...
Q4 (10 marks): What are the values in registers R1, R2 and R3 at the end of this ARMv7 assembly program? MOV R1, #2 MOV R2, #10 MOV R3, #10 L1: CMP R1, R3 BGE L3 BL L2 ADD R1, R1, #3 BL1 L2: ADD R2, R2, #3 MOV R15, R14 L3: MUL R3, R1, R2 Q5 (10 marks): Please write ARMv7 assembly program for following C programs. Assume that variables are stored in memory and their addresses can be...
ASSEMBLY CODE NEED ASAP WILL RATE RIGHT AWAY
all Verizon 6:48 PM What will r2 contain after the execution of the following instructions assuming that the instructions are executed independently? given that initially r2=0XFFFFFFFF r1=0xFF00FF00 and r0= 0xF7 1) MVN r2, 0x7E000000 2) EOR r2,rO,r1; 3) ROR r2,ro,#2; 4)MLA r2,r2,r2,rO 5) RRX, r2,r& initial carry flag =1 6) MOV r2,(14<<3) 7)ASR r2,r1,#1 8)LSL r2,r1,#3 9) LAR r2,r1,#3
Consider the following operations: A B- C The corresponding assembly code instruction list generated by a compiler are 1 load [%r0 +4], %r1 2 load [%r0 + 8], %r2 3 sub %r1, %r2,%r3 4 load [ZrO + 12], %r4 5 add %r3, %r4 , %r5 6 store %r3, [%r0 + 16] 7 store %r5, [%r0 + 20] a) Identify the potential pipeline hazards. (10 points) b) State if the found hazards can be eliminated and if so propose a scheme...
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