Sixtypical Compilation
======================

This is a test suite, written in [Falderal][] format, for compiling
Sixtypical to 6502 machine code.

[Falderal]:     http://catseye.tc/node/Falderal

    -> Functionality "Compile Sixtypical program" is implemented by
    -> shell command "bin/sixtypical --compile %(test-body-file) | fa-bin-to-hex"

    -> Tests for functionality "Compile Sixtypical program"

Null program.

    | routine main
    | {
    | }
    = 00c060

Rudimentary program.

    | routine main
    |   inputs a
    |   outputs a
    |   trashes c, z, n, v
    | {
    |     st off, c
    |     add a, 4
    | }
    = 00c018690460

Call extern.

    | routine chrout
    |   inputs a
    |   trashes a
    |   @ 65490
    | 
    | routine main
    |   inputs a
    |   trashes a, z, n
    | {
    |     ld a, 65
    |     call chrout
    | }
    = 00c0a94120d2ff60

Call defined routine.

    | routine foo
    |   outputs a, x, y
    |   trashes z, n
    | {
    |   ld a, 0
    |   ld x, 0
    |   ld y, 0
    | }
    | 
    | routine main
    |   trashes a, x, y, z, n
    | {
    |     call foo
    | }
    = 00c02004c060a900a200a00060

Access a defined memory location.

    | byte foo
    | 
    | routine main
    |   trashes a, y, z, n, foo
    | {
    |     ld y, 0
    |     st y, foo
    |     ld a, foo
    | }
    = 00c0a0008c09c0ad09c060

Some instructions.

    | byte foo
    | 
    | routine main
    |   trashes a, x, y, z, n, c, v, foo
    | {
    |     ld a, 0
    |     ld x, 0
    |     ld y, 0
    |     st a, foo
    |     st x, foo
    |     st y, foo
    |     st on, c
    |     st off, c
    |     add a, 1
    |     add a, foo
    |     sub a, 1
    |     sub a, foo
    |     inc foo
    |     inc x
    |     inc y
    |     dec foo
    |     dec x
    |     dec y
    |     and a, 255
    |     and a, foo
    |     or a, 255
    |     or a, foo
    |     xor a, 255
    |     xor a, foo
    |     cmp a, 1
    |     cmp a, foo
    |     cmp x, 1
    |     cmp x, foo
    |     cmp y, 1
    |     cmp y, foo
    |     shl a
    |     shr a
    | }
    = 00c0a900a200a0008d46c08e46c08c46c0381869016d46c0e901ed46c0ee46c0e8c8ce46c0ca8829ff2d46c009ff0d46c049ff4d46c0c901cd46c0e001ec46c0c001cc46c02a6a60

Compiling `if`.

    | routine main
    |   trashes a, x, y, z, n, c, v
    | {
    |     ld a, 0
    |     if z {
    |         ld y, 1
    |     } else {
    |         ld y, 2
    |     }
    | }
    = 00c0a900d005a0014c0bc0a00260

Compiling `if` without `else`.

    | routine main
    |   trashes a, x, y, z, n, c, v
    | {
    |     ld a, 0
    |     if z {
    |         ld y, 1
    |     }
    | }
    = 00c0a900d005a0014c0bc0a00260