When an 8-bit or 16-bit data is loaded from the data memory into a 32-bit register,...

 

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When an 8-bit or 16-bit data is loaded from the data memory into a 32-bit register, whether sign extension or zero extension is performed depends on the data's sign. LDRSB (load register with signed byte) LDRSH loads a signed byte and LDRB (load register with byte) for an unsigned byte. LDRSH (load register with signed halfword) and LDRH (load register with halfword) read load a 16-bit signed and unsigned number from memory into a register, respectively. What is the value in register r1 in the following instructions if r0 = 0x20008000? Assume the system is little endian. (1) LDRSB r1, [ro] (2) LDRSH r1, [ro] (3) LDRB r1, [re] (4) LDRH r1, [re] Memory address Data 0x20008002 OxA1 0x20008001 OxB2 0x20008000 0xC3 0x20007FFF 0xD4 0x20007FFE 0xE5 When an 8-bit or 16-bit data is loaded from the data memory into a 32-bit register, whether sign extension or zero extension is performed depends on the data's sign. LDRSB (load register with signed byte) LDRSH loads a signed byte and LDRB (load register with byte) for an unsigned byte. LDRSH (load register with signed halfword) and LDRH (load register with halfword) read load a 16-bit signed and unsigned number from memory into a register, respectively. What is the value in register r1 in the following instructions if r0 = 0x20008000? Assume the system is little endian. (1) LDRSB r1, [ro] (2) LDRSH r1, [ro] (3) LDRB r1, [re] (4) LDRH r1, [re] Memory address Data 0x20008002 OxA1 0x20008001 OxB2 0x20008000 0xC3 0x20007FFF 0xD4 0x20007FFE 0xE5