Sprotne naloge 3

1. Zapišite ukaz v zbirniku za procesor ARM, ki v register R1 naloži konstanto 128. Uporabite takojšnje naslavljanje (ukaz MOV). Izpišite ustrezen strojni ukaz (32 – bitno število v šestnajstiški obliki). Program izvajajte po korakih in opazujte vrednosti registrov r15(PC) in R1. Kakšni sta njuni vrednosti na koncu programa?

2. Zapišite ukaz(e) v zbirniku za procesor ARM, ki v register naloži vrednost spremenljivke:

a) naloži 32-bitno vrednost 0x12345678 v register R1

b) naloži 8-bitno vrednost 128 v register R1.

c) naloži 16-bitno vrednost 0xF123 v register R1

Naloge rešite s posrednim (baznim) naslavljanjem brez odmika preko registra R0.

3. Napišite zaporedje ukazov v zbirniku za procesor ARM, ki vrednost 32-bitne spremenljivke STEV1 prepiše v 32-bitno spremenljivko STEV2. Nalogo rešite še za primer, če sta spremenljivki STEV1 in STEV2 8-bitni oziroma 16-bitni. Vse primere rešite s posrednim (baznim) naslavljanjem brez odmika preko registra R0.

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1. Write down the instruction for the ARM processor, which loads the constant 128 in the R1 register. Use Immmediate Addressing (MOV instruction). Determine the appropriate machine instruction (32 - bit number in hexadecimal form). Run the program step by step and observe the content of the R15 (PC) and R1 registers. What are their values ​​at the end of the program?

2. Write down the instructions for the ARM processor, which loads the variable value in the register R1:

Resolve tasks with indirect (base) addressing without offset through register R0.

3. Write the sequence of instructions in the ARM processor assembly language that overwrites the 32-bit STEV1 variable to the 32-bit STEV2 variable. Solve the task also if the STEV1 and STEV2 variables are 8-bit or 16-bit. Solve all cases with indirect (base) addressing without offset through register R0.