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Op Codes

Memory Address

A memory references a location on the stack. The value is an absolute offset from the start of the last stack frame.

Operations

Store Operation

This operation stores an immediate value inside the specified location.

1
store <size> <destination>, <immediate>

Copy Operation

This operation copies the value of the source location to the destination location.

1
copy <size> <destination>, <source>

Branch Operations

1
op <offset>

Arguments

Available Operations
  • jmp: An unconditional jump.
  • jmp_false: Jumps if the test register is equal to 0.
  • jmp_true: Jumps if the test register is not equal to 0.
Offset

The offset is relative to the end of the branch instruction in bytes.

With 2 Operands

1
op <size> <op1>, <op2>

Arguments

Available Operations
  • add, fadd
  • sub, fsub
  • mul, fmul
  • sdiv, udiv, fdiv
  • srem, urem, frem: Remainder.
  • and, or, xor: Bitwise operations.
  • eq, neq, lt, leq, gt, geq: All standard comparison functions that yield a boolean. The final result is stored inside the test register.
Available Sizes
  • 8, 16, 32, 64
First Operand

op1 must be a memory address. The result of the operation is store here if not specified otherwise.

Second Operand

op2 must be either a memory address or an immediate.

Examples

The following examples demonstrate the use of the op codes. The actual compiler may optimize the code.

In Bia:

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3
let x = 0
let y = x + 0
let z = 1 + y

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store 32 x, 0

cp 32 y, x
add 32 y, 0

store 32 z, 1
add 32 z, y