factor/library/compiler/generator-x86.factor

! :folding=indent:collapseFolds=1:

! $Id$
!
! Copyright (C) 2004 Slava Pestov.
! 
! Redistribution and use in source and binary forms, with or without
! 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.
! 
! 2. Redistributions in binary form must reproduce the above copyright notice,
!    this list of conditions and the following disclaimer in the documentation
!    and/or other materials provided with the distribution.
! 
! THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
! INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
! FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
! DEVELOPERS AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
! SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
! PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
! OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
! WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
! OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
! ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

IN: compiler
USE: alien
USE: combinators
USE: inference
USE: errors
USE: kernel
USE: lists
USE: logic
USE: math
USE: namespaces
USE: stack
USE: strings
USE: words

: LITERAL ( cell -- )
    #! Push literal on data stack.
    4 ESI R+I
    ESI I>[R] ;

: [LITERAL] ( cell -- )
    #! Push complex literal on data stack by following an
    #! indirect pointer.
    4 ESI R+I
    EAX [I]>R
    EAX ESI R>[R] ;

: immediate? ( obj -- ? )
    #! fixnums and f have a pointerless representation, and
    #! are compiled immediately. Everything else can be moved
    #! by GC, and is indexed through a table.
    dup fixnum? swap f eq? or ;

: compile-literal ( obj -- )
    dup immediate? [
        address LITERAL
    ] [
        intern-literal [LITERAL]
    ] ifte ;

: PUSH-DS ( -- )
    #! Push contents of EAX onto datastack.
    4 ESI R+I
    EAX ESI R>[R] ;

: POP-DS ( -- )
    #! Pop datastack, store pointer to datastack top in EAX.
    ESI EAX [R]>R
    4 ESI R-I ;

: SELF-CALL ( name -- )
    #! Call named C function in Factor interpreter executable.
    dlsym-self CALL JUMP-FIXUP ;

: TYPE ( -- )
    #! Peek datastack, store type # in EAX.
    ESI PUSH-[R]
    "type_of" SELF-CALL
    4 ESP R+I ;

: ARITHMETIC-TYPE ( -- )
    #! Peek top two on datastack, store arithmetic type # in EAX.
    ESI EAX R>R
    EAX PUSH-[R]
    4 EAX R-I
    EAX PUSH-[R]
    "arithmetic_type" SELF-CALL
    8 ESP R+I ;

\ #push [ compile-literal ] "generator" set-word-property
\ #call [ CALL compiled-offset defer-xt ] "generator" set-word-property
\ #return [ drop RET ] "generator" set-word-property