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+.\" $NetBSD: genassym.cf.5,v 1.13 2017/07/03 21:30:59 wiz Exp $
+.\"
+.\" Copyright (c) 1997 Matthias Pfaller.
+.\" All rights reserved.
+.\"
+.\" 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 BY THE AUTHOR ``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 AUTHOR 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.
+.\"
+.Dd August 18, 2005
+.Dt GENASSYM.CF 5
+.Os
+.Sh NAME
+.Nm genassym.cf
+.Nd assym.h definition file
+.Sh DESCRIPTION
+The
+.Nm
+file is used by
+.Xr genassym 1
+to make constant C expressions known to assembler source files.
+Lines starting with '#' are discarded by
+.Xr genassym 1 .
+Lines starting with
+.Em include ,
+.Em ifdef ,
+.Em if ,
+.Em else
+or
+.Em endif
+are preceded with '#' and passed otherwise unmodified to the C compiler.
+Lines starting with
+.Em quote
+get passed on with the
+.Em quote
+command removed.
+The first word after a
+.Em define
+command is taken as a CPP identifier and the rest of the line has to be
+a constant C expression. The output of
+.Xr genassym 1
+will assign the numerical value of this expression to the CPP identifier.
+.Em "export X"
+is a shorthand for
+.Em "define X X" .
+.Em "struct X"
+remembers X for the
+.Em member
+command and does a
+.Em "define X_SIZEOF sizeof(X)" .
+.Em "member X"
+does a
+.Em "define X offsetof(<last struct>, X)" .
+.Em "config <ctype> <gcc constraint> <asm print modifier>"
+can be used to customize the output of
+.Xr genassym 1 .
+When producing C output, values are casted to <ctype> (default: long)
+before they get handed to printf. <gcc constraint> (default: n) is the
+constraint used in the __asm__ statements. <asm print modifier> (default:
+empty) can be used to force gcc to output operands in different ways
+then normal. The "a" modifier e.g. stops gcc from emitting immediate
+prefixes in front of constants for the i386 and m68k port.
+.Sh FILES
+.Pa /usr/src/sys/arch/${MACHINE}/${MACHINE}/genassym.cf
+.Sh SEE ALSO
+.Xr genassym 1
+.Sh HISTORY
+The
+.Nm
+file appeared in
+.Nx 1.3 .