60 lines
2.0 KiB
Factor
60 lines
2.0 KiB
Factor
! :folding=indent:collapseFolds=1:
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! $Id$
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!
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! Copyright (C) 2004 Slava Pestov.
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!
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! Redistribution and use in source and binary forms, with or without
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! modification, are permitted provided that the following conditions are met:
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!
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! 1. Redistributions of source code must retain the above copyright notice,
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! this list of conditions and the following disclaimer.
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!
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! 2. Redistributions in binary form must reproduce the above copyright notice,
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! this list of conditions and the following disclaimer in the documentation
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! and/or other materials provided with the distribution.
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!
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! THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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! INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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! FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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! DEVELOPERS AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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! SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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! PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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! OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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! WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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! OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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! ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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IN: compiler
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: LITERAL ( cell -- )
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#! Push literal on data stack.
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#! Assume that it is ok to clobber EAX without saving.
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DATASTACK EAX [I]>R
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EAX I>[R]
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4 DATASTACK I+[I] ;
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: [LITERAL] ( cell -- )
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#! Push complex literal on data stack by following an
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#! indirect pointer.
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ECX PUSH-R
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( cell -- ) ECX [I]>R
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DATASTACK EAX [I]>R
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ECX EAX R>[R]
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4 DATASTACK I+[I]
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ECX POP-R ;
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: PUSH-DS ( -- )
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#! Push contents of EAX onto datastack.
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ECX PUSH-R
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DATASTACK ECX [I]>R
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EAX ECX R>[R]
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4 DATASTACK I+[I]
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ECX POP-R ;
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: POP-DS ( -- )
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#! Pop datastack, store pointer to datastack top in EAX.
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DATASTACK EAX [I]>R
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4 EAX R-I
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EAX DATASTACK R>[I] ;
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