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Problem A . On an ARM processor, determine the values of four condition flags in APSR after an arithmetic operation is executed in each case
Problem A On an ARM processor, determine the values of four condition flags in APSR after an arithmetic operation is executed in
each case assuming that Sbit is set The addition or subtraction must be performed in HEX or BIN and can NOT be performed in
DEC since those numbers represent signed OR unsigned values These instructions are NOT executed one after the other one; instead,
each instruction starts with the initial conditions given in the statement.
axxAC
bxxEDCBAoptional extra bonus points
Problem B In each of the following MOV or MVN instruction, identify whether the use of the immediate value is VALID or INVALID.
a MOV R #xD
b MOVW R #xE
c MOV R #xAC
d MVN R #xAC
e MVN R #
f MVN R #xB
g MOV R #xFF
h MOV R #xCDEF
Problem C: On an ARM processor, assuming that NbitZbitCbitVbit predict whether each of the following
branch instruction is going to make the flow of control branch to the instruction labeled by NEXT ie YES or NOThese instructions
are NOT executed one after the other one; instead, each instruction starts with the initial conditions given in the statement.
a BLS NEXT
b BNE NEXT
c BLE NEXT
d BVC NEXT
Problem D On an ARMvM or ARMvM processor, assuming that RxECDRxFDBRxC
NbitZbitCbitVbit predict the bit RNbitZbit and Cbit after an ARM instruction is executed
in EACH case. These instructions are NOT executed one after the other; instead, each instruction starts with the initial conditions given
in the statement.
a MOVS R #xFAB
b MVNS R #xFC
c MVNS R R LSL R
d LSRS R R R
e MVNS R R
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