1. Shift Operation Instructions LSL, LSR, ASR, ROR, RRX
2. Instruction Condition Code
3. Memory Access Instructions
— LDR Word Data Load Instruction.LDR instruction is used to transfer a 32-bit word data from memory to the destination register. This instruction is usually used to read 32-bit word data into a general-purpose register for processing.
— LDRB Byte Data Load Instruction.LDRB instruction is used to transfer an 8-bit byte data from memory to the destination register, while clearing the upper 24 bits of the register. This instruction is usually used to read 8-bit byte data into a general-purpose register for processing.
— LDRH Halfword Data Load Instruction.LDRH instruction is used to transfer a 16-bit halfword data from memory to the destination register, while clearing the upper 16 bits of the register. This instruction is usually used to read 16-bit halfword data into a general-purpose register for processing.
— STR Word Data Store Instruction.STR instruction is used to transfer a 32-bit word data from the source register to memory.
— STRB Byte Data Store Instruction.STRB instruction is used to transfer an 8-bit byte data from the source register to memory.
— STRH Halfword Data Store Instruction.STRH instruction is used to transfer a 16-bit halfword data from the source register to memory.
4. Arithmetic Operation Instructions
5. Logic Operation Instructions
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AND |
Logical AND Operation Instruction |
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ORR |
Logical OR Operation Instruction |
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EOR |
Logical XOR Operation Instruction |
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BIC |
Bit Clear Instruction |
6. Other Common Instructions
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CMP |
Comparison Instruction |
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MUL |
32-bit Multiplication Instruction |
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B |
Branch Instruction |
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BL |
Branch with Link Instruction |
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SWI |
Software Interrupt Instruction SWI 12 |
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MRS |
Read Status Register Instruction MRS R0,CPSR |
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MSR |
Write Status Register Instruction MSR CPSR,R1 |
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DCB |
Used to allocate a contiguous block of memory and initialize with specified data |
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CODE16/CODE32 |
Tells the compiler the type of the following instructions |