Hardlang

Hardlang is based on a single accumulator A, which is exactly one word in length. Constants are very hard to represent in it. At the start of a program, A = 0.

Instructions

These are the language's instructions:

• !: Inversion: This instruction inverts all bits in the accumulator.
• <: Shift Right: This instruction shifts every bit in A one place to the right. The leftmost bit becomes a zero and the rightmost bit is discarded.

After every operation, hardlang will output the content of the accumulator.

Example programs

Under a nibble:

0:
1:!<!
2:!<!<
3:!<<!
4:!<!<<
5:!<!<!<!
6:!<<!<
7:!<<<!
8:!<<<
9:!<<!<!
10:!<!<!<
11:!<!<<!
12:!<<
13:!<!<!
14:!<
15:!

Interpreter

Written in JavaScript (66 bytes). Pass it the program as an argument. Don't pass a.

var hardlang=(c,a=0)=>c.map(h=>{h=="!"&&(a=~a);h=="<"&&(a>>=1);});