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zk/Machine code.md
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@ -20,7 +20,7 @@ an [[Instruction_set_architectures| ARM ISA]]. It moves the number `4` into the
11100011101000000111000000000100 11100011101000000111000000000100
``` ```
This 32bit line of binary has a series of instructions embedded within it. We This 32-bit line of binary has a series of instructions embedded within it. We
partition each part of the sequence below, from left to right, mapping it to the partition each part of the sequence below, from left to right, mapping it to the
instruction: instruction:
@ -36,10 +36,25 @@ instruction:
| 0000 | -- | -- | | 0000 | -- | -- |
| 00000100 | immediate value | the binary representation of decimal '4' | | 00000100 | immediate value | the binary representation of decimal '4' |
- The blank values are also instruction points, they are just not used in this - The blank zeros are also instructions, they are just not used in this
instruction instruction
- The instruction should run in all conditions not only under certain - The condition sequence tells us the instruction should run in all conditions
circumstances not only under certain circumstances
- The immediate bit (`1`) tells us - The immediate bit (`1`) tells us whether the the value we are accessing is
contained within the instruction or whether it is stored in a register. In
this scenario `1` means the value is in the instruction. If it were `0`, the
register where the value is located would be specified elsewhere in the
instruction (in one of the currently blank sequences).
- The opcode correspoons to `mov` the value.
- THe destination register details where the value should be moved to (`r7`)
- Finally, the immediate value is equivalent to decimal `4`
## In hexadecimal
We can make things easier to understand by using the
[[Hexadecimal_number_system]]: