Perl 6
SMOP Mold: Revision 20
(Mold is currently under implementation)
SMOP Mold is a register based interpreter implementation
A DSL called m0ld is used to represent mold opcodes in text form
A Mold block(?) is composed of three parts
- the number of registers used by the program (not counting the ones used to put constants or the 3 special ones)
- constants - which are put into registers
- opcodes
The registers 1,2,3 are initialised with
- interpreter
- identifier
- capture
Mold opcodes
- call target,invocant,identifier,named,positionals
- call2 responder,capture,target
- goto label - jumps to label
- br register,iftrue,iffalse - jumps to iftruel if the native bool in register is true to iffalse otherwise
$*OUT.print("hello world\n") is translated to
# register declarations
my $r9;
my $r10; # we have to store even unused return values somewhere
# constants
my $r4 = $SMOP__S1P__RootNamespace;
my $r5 = "postcircumfix:{ }";
my $r6 = "$*OUT";
my $r7 = "print";
my $r8 = "hello world\n";
#opcodes
$r9 = $r4.$r5($r6);
$r10 = $r9.$r7($r8);
The opcodes part ultimatly compiles to such byte code
1 9 1 4 5 1 6 0 1 10 1 9 7 1 8 0 0
