ULRtA-

A simple asm-like language with advanced features.

Commands:

in

Read a string from Standard Input to the specified register, with the prompt specified

Syntax: in [prompt string] [register]

Example: in $PROMPT $asn

out

Print a String, Int or register to Standard Output

Syntax: out [register, string, int]

Example: out $RESULT

mov

Store the specified value in the specified register

Syntax: mov[value] [register]

Example: mov 5 $ADD

Note: Register name should be CAPS, and begin with $

add

Add the first and second registers, and store it in the third register

Syntax: add [int or register] [int or register] [register]

Example: add 5 5 $RESULT

sub

Subtract the first and second registers, and store the result in the third register

Syntax: sub [int or register] [int or register] [register]

Example sub 7 5 $RESULT

times

Mulitply the first and second registers, and store the result in the third register

Syntax: times [int or register] [int or register] [register]

Example: times 7 6 $RESULT

div

Divied the first and second registers, and store the result in the third register

Syntax: div [int or register] [int or register] [register]

Example: div 47 6 $RESULT

goto

Goto the specified label

Syntax: goto [label]

Example: goto .MAIN

if

If the two specified terms match, then goto the label. Else, continue

Syntax: if [register, string, int] (is) [register, string, int] (then) (goto) [label]*

*Terms in parenthesis optional, but recommended

Example: if 5 is $ANS then goto .YES

end

Stop execution

Syntax: end

Example: end

dump

Print the raw content of the registers to Standard Output. Good for debugging

Syntax: dump

Example: dump

join

Joins two strings together, and stores the result in the third register Syntax: join [string] [string] [register] Example: join "Hi, " $NAME $RESPONSE

int

Converts the specified register to an int, and raises ConversionError if it fails Syntax: int [register] Example: int $INPUT

str

Converts the specified register to an string, and raises ConversionError if it fails Syntax: str [register] Example: str $INPUT

How to label

To make a label for a goto or if, just prefix it with a '.'

Syntax: .[label]

Example: .MAIN