100 lines
1.8 KiB
Text
100 lines
1.8 KiB
Text
#
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;
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; (c) copyright 1988 by the Vrije Universiteit, Amsterdam, The Netherlands.
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; See the copyright notice in the ACK home directory, in the file "Copyright".
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;
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;
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; Module: Interface to some EM instructions and data
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; Author: Ceriel J.H. Jacobs
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; Version: $Header$
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;
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mes 2,_EM_WSIZE,_EM_PSIZE
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#define ARG1 0
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#define ARG2 _EM_DSIZE
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#define IRES 2*_EM_DSIZE
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; FIF is called with three parameters:
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; - address of integer part result (IRES)
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; - float two (ARG2)
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; - float one (ARG1)
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; and returns an _EM_DSIZE-byte floating point number
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; Definition:
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; PROCEDURE FIF(ARG1, ARG2: LONGREAL; VAR IRES: LONGREAL) : LONGREAL;
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exp $FIF
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pro $FIF,0
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lal 0
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loi 2*_EM_DSIZE
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fif _EM_DSIZE
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lal IRES
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loi _EM_PSIZE
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sti _EM_DSIZE
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ret _EM_DSIZE
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end ?
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#define FARG 0
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#define ERES _EM_DSIZE
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; FEF is called with two parameters:
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; - address of base 2 exponent result (ERES)
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; - floating point number to be split (FARG)
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; and returns an _EM_DSIZE-byte floating point number (the mantissa)
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; Definition:
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; PROCEDURE FEF(FARG: LONGREAL; VAR ERES: integer): LONGREAL;
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exp $FEF
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pro $FEF,0
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lal FARG
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loi _EM_DSIZE
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fef _EM_DSIZE
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lal ERES
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loi _EM_PSIZE
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sti _EM_WSIZE
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ret _EM_DSIZE
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end ?
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#define TRAP 0
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; TRP is called with one parameter:
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; - trap number (TRAP)
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; Definition:
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; PROCEDURE TRP(trapno: INTEGER);
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exp $TRP
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pro $TRP, 0
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lol TRAP
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trp
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ret 0
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end ?
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#define PROC 0
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; SIG is called with one parameter:
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; - procedure instance identifier (PROC)
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; and returns the old traphandler.
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exa handler
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exp $SIG
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pro $SIG, 0
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lae handler
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loi _EM_PSIZE
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lal PROC
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loi _EM_PSIZE
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lae handler
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sti _EM_PSIZE
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ret _EM_PSIZE
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end ?
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exp $LINO
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pro $LINO,0
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loe 0
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ret _EM_WSIZE
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end ?
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exp $FILN
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pro $FILN,0
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lae 4
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loi _EM_PSIZE
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ret _EM_PSIZE
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end ?
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