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; NASM macro set to make interfacing to 16-bit programs easier -*- nasm -*-
%imacro proc 1 ; begin a procedure definition
%push proc
global %1
%1: push bp
mov bp,sp
%ifdef FARCODE PASCAL ; arguments may start at bp+4 or bp+6
%assign %$arg 6
%else
%assign %$arg 4
%endif
%define %$procname %1
%endmacro
%imacro arg 0-1 2 ; used with the argument name as a label
equ %$arg
%assign %$arg %1+%$arg
%endmacro
%imacro endproc 0
%ifnctx proc
%error Mismatched `endproc'/`proc'
%else
mov sp,bp
pop bp
%ifdef PASCAL
retf %$arg
%elifdef FARCODE
retf
%else
retn
%endif
__end_%$procname: ; useful for calculating function size
%pop
%endif
%endmacro
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