A program that compiles a simple imperative language into bcomp-ng assembler

bcompc #input from stdin, output to stdout
bcompc input.bc #output to stdout
bcompc input.bc output.asm

Perhaps the required version is built already on the releases page

Open the project directory and type (will need cabal and ghc installed)

cabal install

Go-like syntax

a := 3 /*comment*/
b := 45 //line comment

while a <= 6 { 
    a = a + 2
}

if a != 16 {
    a = <<a + (a & b) - (a | b) + >>a + (-a) + ~b
} else {
    a = -4
}

goto skip
a = 0
skip:

return a + b

All values represent integer signed 16 bit numbers (int16)

• {var} := {expr} - assignment operator
• {var} = {expr} - modifying operator
• goto {label} - continues execution from the given label
• {label}: - label to which goto jumps
• return {expr} - puts the result of the expression into the AC register and stops execution with HLT
• if {logic_expr} {stmts} [else {stmts}] - conditional execution
• while {logic_expr} {stmts} - preconditioned loop

• {expr} == {expr} - equally
• {expr} != {expr} - not equal
• {expr} > {expr} - greater
• {expr} < {expr} - lower
• {expr} >= {expr} - greater or equally
• {expr} <= {expr} - lower or equally

• +{expr} - does nothing
• -{expr} - negative value
• ~{expr} - bitwise not
• <<{expr} - bitwise left shift (*2)
• >>{expr} - bitwise right shift (/2)
• {expr} + {expr} - sum
• {expr} - {expr} - difference
• {expr} | {expr} - bitwise or
• {expr} & {expr} - bitwise and