?RCS: $Id: registers.U 1 2006-08-24 12:32:52Z rmanfredi $
?RCS:
?RCS: Copyright (c) 1991-1997, 2004-2006, Raphael Manfredi
?RCS:
?RCS: You may redistribute only under the terms of the Artistic Licence,
?RCS: as specified in the README file that comes with the distribution.
?RCS: You may reuse parts of this distribution only within the terms of
?RCS: that same Artistic Licence; a copy of which may be found at the root
?RCS: of the source tree for dist 4.0.
?RCS:
?RCS: $Log: registers.U,v $
?RCS: Revision 3.0.1.2  1997/02/28  16:19:41  ram
?RCS: patch61: removed empty ?LINT lines
?RCS:
?RCS: Revision 3.0.1.1  1994/10/29  16:28:33  ram
?RCS: patch36: call ./Cppsym explicitly instead of relying on PATH
?RCS:
?RCS: Revision 3.0  1993/08/18  12:09:41  ram
?RCS: Baseline for dist 3.0 netwide release.
?RCS:
?MAKE:registers reg1 reg2 reg3 reg4 reg5 reg6 reg7 reg8 reg9 reg10 reg11 \
	reg12 reg13 reg14 reg15 reg16: awk rm Cppsym Myread Oldconfig
?MAKE:	-pick add $@ %<
?S:registers:
?S:	This variable contains the number of register declarations paid
?S:	attention to by the C compiler.
?S:.
?S:reg1:
?S:	This variable, along with reg2, reg3, etc. contains the eventual
?S:	value for the symbols register1, register2, register3, etc.  It has
?S:	either the value "register" or is null.
?S:.
?C:register1:
?C:	This symbol, along with register2, register3, etc. is either the word
?C:	"register" or null, depending on whether the C compiler pays attention
?C:	to this many register declarations.  The intent is that you don't have
?C:	to order your register declarations in the order of importance, so you
?C:	can freely declare register variables in sub-blocks of code and as
?C:	function parameters.  Do not use register<n> more than once per routine.
?C:.
?LINT:describe reg2 reg3 reg4 reg5 reg6 reg7 reg8 reg9 reg10 reg11
?LINT:describe reg12 reg13 reg14 reg15 reg16
?LINT:known register2 register3 register4 register5 register6 register7
?LINT:known register8 register9 register10 register11 register12 register13
?LINT:known register14 register15 register16
?H:#define register1 $reg1		/**/
?H:#define register2 $reg2		/**/
?H:#define register3 $reg3		/**/
?H:#define register4 $reg4		/**/
?H:#define register5 $reg5		/**/
?H:#define register6 $reg6		/**/
?H:#define register7 $reg7		/**/
?H:#define register8 $reg8		/**/
?H:#define register9 $reg9		/**/
?H:#define register10 $reg10	/**/
?H:#define register11 $reg11	/**/
?H:#define register12 $reg12	/**/
?H:#define register13 $reg13	/**/
?H:#define register14 $reg14	/**/
?H:#define register15 $reg15	/**/
?H:#define register16 $reg16	/**/
?H:.
?F:!.foo
: see how many register declarations we want to use
case "$registers" in
'')
	if ./Cppsym vax; then
		dflt=6
	elif ./Cppsym sun mc68000 mips; then
		dflt=10
	elif ./Cppsym pyr; then
		dflt=14
	elif ./Cppsym ns32000 ns16000; then
		dflt=5
	elif ./Cppsym $smallmach; then
		dflt=3
	else
		: if you have any other numbers for me, please send them in
		dflt=6
	fi;;
*) dflt=$registers ;;
esac
?LINT:set reg2 reg3 reg4 reg5 reg6 reg7 reg8 reg9 reg10 reg11
?LINT:set reg12 reg13 reg14 reg15 reg16
cat <<EOM
 
Different C compilers on different machines pay attention to different numbers
of register declarations.  About how many register declarations in each routine
does your C compiler pay attention to?  (OK to guess)

EOM
rp="Maximum register declarations?"
. ./myread
registers=$ans
reg1=''
$awk "BEGIN { for (i=1; i<=16; i++) printf \"reg%d=''\n\", i}" \
	</dev/null >.foo
. ./.foo
$awk "BEGIN { for (i=1; i<=$registers; i++) printf \"reg%d=register\n\", i}" \
	</dev/null >.foo
. ./.foo
$rm -f .foo

