Instruction listing

Instructions

Note: all of the instructions listed below are lowercase because they're written like so in customasm, which is a case-sensitive assembler.

Legend:

      D = destination
      S = source
      L = label
      A/B = compared values

When an operand starts with % it becomes a pointer. E.g: in the instruction mov D, %S, %S will point to the specified memory address. The destination operand always points to a memory location, but can also point to another pointer (&memory[memory[XX]]).

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• nop - do nothing
• ext, ret - exit/return from the current scope
• call L - call the label; jump to the label temporarily
• int S - call a software interruption, S is the interruption code
• jmp L - jump to the destination label
• jeq L - jump to the destination label if the comparison is equal
• jnq L - ... is not equal
• jhi L - ... A is higher than B
• jlw L - ... A is lower than B
• jhe L - ... A is higher or equal to B
• jle L - ... A is lower or equal to B
• mov D, S - move/copy S to D
• add D, S - add S to D
• sub D, S - subtract S from D
• mul D, S - multiply S with D
• div D, S - divide S by D
• or D, S - binary OR D with S
• xor D, S - binary eXclusive OR D with S
• and D, S - binary AND D with S
• not D, S - binary NOT D with S
• shl D, S - left shift bits from D by S times
• shr D, S - right shift bits from D with S times
• cmp D, S - compare D to S