factor/library/compiler/assembler.factor

! :folding=indent:collapseFolds=1:

! $Id$
!
! Copyright (C) 2004 Slava Pestov.
! 
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! modification, are permitted provided that the following conditions are met:
! 
! 1. Redistributions of source code must retain the above copyright notice,
!    this list of conditions and the following disclaimer.
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! 2. Redistributions in binary form must reproduce the above copyright notice,
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IN: compiler
USE: combinators
USE: math
USE: kernel
USE: stack

: cell 4 ;
: literal-table 1024 cell * ;

: init-assembler ( -- )
    compiled-offset literal-table + set-compiled-offset ;

: compile-aligned ( n -- )
    dup compiled-offset mod dup 0 = [
        2drop
    ] [
        - compiled-offset + set-compiled-offset
    ] ifte ;

: intern-literal ( obj -- lit# )
    address-of
    literal-top set-compiled-cell
    literal-top dup cell + set-literal-top ;

: compile-byte ( n -- )
    compiled-offset set-compiled-byte
    compiled-offset 1 + set-compiled-offset ;

: compile-cell ( n -- )
    compiled-offset set-compiled-cell
    compiled-offset cell + set-compiled-offset ;

: DATASTACK ( -- ptr )
    #! A pointer to a pointer to the datastack top.
    11 getenv ;

: CALLSTACK ( -- ptr )
    #! A pointer to a pointer to the callstack top.
    12 getenv ;