31 lines
900 B
Markdown
31 lines
900 B
Markdown
---
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id: iqh8
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title: Machine_code
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tags: [binary, CPU]
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created: Monday, March 11, 2024
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---
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# Machine code
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No matter how a program was originally written, it eventually needs to execute
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on a [[CPU_architecture|CPU]] as a series of machine language instructions.
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## Example machine instruction
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The following machine instruction is an instruction that would be understood by
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an [[Instruction_set_architectures| ARM ISA]]. It moves the number `4` into the
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`r7` register:
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```
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11100011101000000111000000000100
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```
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This 32bit line of binary has a series of instructions embedded within it. We
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partition each part of the sequence below, from left to right, mapping it to the
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instruction:
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| Binary sequence | Instruction | Action |
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| --------------- | ----------- | ------ |
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| 1110 | | |
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| 00 | | |
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| 1101 | | |
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