macro.inc

;=========================================================================
; macro.inc - Defines macros
;       setloc
;-------------------------------------------------------------------------
;
; Compiles with NASM 2.11.08, might work with other versions
;
; Copyright (C) 2010 - 2020 Sergey Kiselev.
; Provided for hobbyist use on the Xi 8088 and Micro 8088 boards.
;
; This program is free software: you can redistribute it and/or modify
; it under the terms of the GNU General Public License as published by
; the Free Software Foundation, either version 3 of the License, or
; (at your option) any later version.
;
; This program is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
; GNU General Public License for more details.
;
; You should have received a copy of the GNU General Public License
; along with this program.  If not, see <http://www.gnu.org/licenses/>.
;
;=========================================================================

;=========================================================================
; setloc - Set location. Insert 0FFh bytes until specifed location is reached.
;-------------------------------------------------------------------------
%imacro setloc  1.nolist
%assign pad_bytes (%1-($-$$)-START)
%if pad_bytes < 0
%assign over_bytes -pad_bytes
%error Preceding code extends beyond setloc location by over_bytes bytes
%endif
%if pad_bytes > 0
%warning Inserting pad_bytes bytes
 times  pad_bytes db 0FFh
%endif
%endm