--- /dev/null
+#!/bin/sh
+#
+# If your shell doesn't support functions (true for some BSD users),
+# you might try using GNU's bash.
+#
+#ident "@(#) movstr-m88k.sh 17-Oct-90"
+#
+# This file provided by Data General, Feburary 1990.
+#
+# This script generates the necessary movstr library functions
+# for the m88000. These functions are called from the expansion
+# of movstrsi. There are eight modules created by this script,
+# each with multiple entry points. One module, movstrSI64n
+# implements a word aligned loop; the other modules, movstrXINx
+# implement a straight line copy of N bytes in mode XI.
+#
+# By analysis of the best memcpy function, it can be determined
+# what appear to be certain magic numbers. For example, a
+# memcpy of 13 bytes, where the pointers are determined at run
+# time to be word aligned takes 28 cycles. A call to
+# __movstrQI13x13 also takes 28 cycles. The break even point
+# for a HImode copy is 38 bytes. Just to be on the safe side,
+# these are bumped to 16 and 48 respectively.
+#
+# The smaller, odd-remainder modules are provided to help
+# mitigate the overhead of copying the last bytes.
+#
+# Changes to these functions should not be taken lightly if you
+# want to be able to link programs built with older movstr
+# parameters. For this reason, Makefile regards movstr*.s as
+# source modules and does not have a rule for creating them
+# automatically.
+#
+#.Revision History
+#
+# 26-Oct-90 Tom Wood Delete movstr.h; moved to out-m88k.c.
+# 17-Oct-90 Tom Wood Files are named *.asm rather than *.s.
+# 11-Sep-90 Jeffrey Friedl
+# On my BSD 4.3 awk and my GNU-awk, only the
+# first character of an argument to -F is passed
+# through, so I can't get this to work.
+# 5-Sep-90 Ray Essick/Tom Wood
+# Added a -no-tdesc option.
+# 27-Aug-90 Vince Guarna/Tom Wood
+# Version 3 assembler syntax (-abi).
+# 16-Aug-90 Ron Guilmette
+# Avoid problems on a Sparc. The common
+# denominator among shells seems to be '...\'
+# rather than '...\\'.
+# 15-Aug-90 Ron Guilmette
+# Avoid awk syntax errors on a Sun by not using
+# the `!' operator.
+# 22-Feb-90 Tom Wood Created.
+# 20-Jun-90 Tom Wood Emit file directives.
+#
+#.End]=--------------------------------------------------------------*/
+
+usage() {
+ echo "usage: $0 [ -abi ] [ -no-tdesc ]" 1>&2
+ exit 1
+}
+
+awk_flag="-F:";
+awk_begin="BEGIN { "
+do_file() {
+ echo " file $1";
+}
+
+while [ $# -gt 0 ] ; do
+ case $1 in
+ -no-tdesc) awk_begin="$awk_begin no_tdesc=1;";;
+ -abi) awk_begin="$awk_begin abi=1;"
+ do_file() {
+ echo ' version "03.00"';
+ echo " file $1";
+ };;
+ *) usage;;
+ esac
+ shift
+done
+
+rm -f movstr?I*[xn].s movstr?I*[xn].asm
+
+#.Implementation_continued[=-----------------------------------------------
+#
+# This generates the word aligned loop. The loop is entered
+# from the callable entry points ___movstrSI64nN, where at
+# least N bytes will be copied. r2 is the destination pointer
+# offset by 4, r3 is the source pointer offset by 4, r6 is the
+# loop count. Thus, the total bytes moved is 64 * r6 + N. The
+# first value is is preloaded into r4 or r5 (r4 if N/4 is odd;
+# r5 if N/4 is even). Upon returning, r2 and r3 have been
+# updated and may be used for the remainder bytes to move.
+#
+# The code for this loop is generated by the awk program
+# following. Edit *it*, not what it generates!
+#
+#.End]=------------------------------------------------------------------*/
+
+gen_movstrN() {
+ awk $awk_flag "$awk_begin"'
+ if (abi) {
+ ps="#"; us=""; tf="a";
+ } else {
+ ps=""; us="_"; tf="x";
+ }
+ }
+ NR == 1 && NF == 4 {
+ mode = $1; suffix = $2; align = $3; count = $4;
+ ld = align; st = 0;
+
+ printf "; The following was calculated using awk.\n";
+ printf "\ttext\n";
+ printf "\talign\t16\n";
+ printf "loop%s%d:\n", mode, count * align;
+ printf "\taddu\t%sr3,%sr3,%d\n", ps, ps, count * align;
+ printf "\taddu\t%sr2,%sr2,%d\n", ps, ps, count * align;
+ printf "\tsubu\t%sr6,%sr6,1\n", ps, ps;
+ for (r = count + 1; r >= 1; r--) {
+ evenp = r % 2;
+ name = sprintf("__%smovstr%s%dn%d", us, mode, count * align, r * align);
+ if (r > 1) {
+ printf "\tglobal\t%s\n", name;
+ printf "%s:\n", name;
+ }
+ if (r > 2) {
+ printf "\tld%s\t%sr%d,%sr3,%d\n", suffix, ps, 4 + evenp, ps, ld;
+ printf "\tst%s\t%sr%d,%sr2,%d\n", suffix, ps, 5 - evenp, ps, st;
+ } else if (r == 2) {
+ printf "\tld%s\t%sr%d,%sr3,%d\n", suffix, ps, 4 + evenp, ps, ld;
+ printf "\tbcnd.n\t%sgt0,%sr6,loop%s%d\n", ps, ps, mode, count * align;
+ printf "\tst%s\t%sr%d,%sr2,%d\n", suffix, ps, 5 - evenp, ps, st;
+ printf "\tjmp.n\t%sr1\n", ps;
+ } else {
+ printf "\tst%s\t%sr%d,%sr2,%d\n", suffix, ps, 5 - evenp, ps, st;
+ }
+ ld += align; st += align;
+ }
+ if (!no_tdesc) {
+ printf "end%s%d:\n", mode, count * align;
+ printf "\tsection\t.tdesc,\"%s\"\n", tf;
+ printf "\tword\t0x42\n";
+ printf "\tword\t1\n";
+ printf "\tword\tloop%s%d\n", mode, count * align;
+ printf "\tword\tend%s%d\n", mode, count * align;
+ printf "\tword\t0x0100001f\n";
+ printf "\tword\t0\n";
+ printf "\tword\t1\n";
+ printf "\tword\t0\n";
+ printf "\ttext\n";
+ }
+ printf "; End of awk generated code.\n";
+ exit;
+ }'
+}
+
+(do_file '"movstrSI64n.s"';
+ echo 'SI::4:16' | gen_movstrN) > movstrSI64n.asm
+
+#.Implementation_continued[=-----------------------------------------------
+#
+# This generates the even-remainder, straight-line modules.
+# The code is entered from the callable entry points
+# ___movstrXINxM, where exactly M bytes will be copied in XI
+# mode. r2 is the destination pointer, r3 is the source
+# pointer, neither being offset. The first value is preloaded
+# into r4 or r5 (r4 if M-N/B is even; r5 if M-N/B is odd, where
+# B is the mode size of XI). Upon returning, r2 and r3 have not
+# been changed.
+#
+# The code for these cases is generated by the awk program
+# following. Edit *it*, not what it generates!
+#
+#.End]=------------------------------------------------------------------*/
+
+gen_movstrX0() {
+ awk $awk_flag "$awk_begin"'
+ if (abi) {
+ ps="#"; us=""; tf="a";
+ } else {
+ ps=""; us="_"; tf="x";
+ }
+ }
+ NR == 1 && NF == 4 {
+ mode = $1; suffix = $2; align = $3; bytes = $4;
+ ld = align; st = 0; count = bytes / align;
+ printf "; The following was calculated using awk.\n";
+ printf "\ttext\n";
+ printf "\talign\t16\n";
+ for (r = count; r >= 1; r--) {
+ evenp = r % 2;
+ name = sprintf("__%smovstr%s%dx%d", us, mode, count * align, r * align);
+ if (r > 1) {
+ printf "\tglobal\t%s\n", name;
+ printf "%s:\n", name;
+ }
+ if (r == 1)
+ printf "\tjmp.n\t%sr1\n", ps;
+ else
+ printf "\tld%s\t%sr%d,%sr3,%d\n", suffix, ps, 4 + evenp, ps, ld;
+ printf "\tst%s\t%sr%d,%sr2,%d\n", suffix, ps, 5 - evenp, ps, st;
+ ld += align; st += align;
+ }
+ if (!no_tdesc) {
+ printf "end%s%dx:\n", mode, count * align;
+ printf "\tsection\t.tdesc,\"%s\"\n", tf;
+ printf "\tword\t0x42\n";
+ printf "\tword\t1\n";
+ printf "\tword\t__%smovstr%s%dx%d\n", us, mode, count * align, count * align;
+ printf "\tword\tend%s%dx\n", mode, count * align;
+ printf "\tword\t0x0100001f\n";
+ printf "\tword\t0\n";
+ printf "\tword\t1\n";
+ printf "\tword\t0\n";
+ printf "\ttext\n";
+ }
+ printf "; End of awk generated code.\n"
+ exit;
+ }'
+}
+
+(do_file '"movstrQI16x.s"';
+ echo 'QI:.b:1:16' | gen_movstrX0) > movstrQI16x.asm
+(do_file '"movstrHI48x.s"';
+ echo 'HI:.h:2:48' | gen_movstrX0) > movstrHI48x.asm
+(do_file '"movstrSI96x.s"';
+ echo 'SI::4:96' | gen_movstrX0) > movstrSI96x.asm
+
+#.Implementation_continued[=-----------------------------------------------
+#
+# This generates the odd-remainder, straight-line modules. The
+# interface is the same as that for the even-remainder modules.
+#
+#.End]=------------------------------------------------------------------*/
+
+gen_movstrXr() {
+ awk $awk_flag "$awk_begin"'
+ if (abi) {
+ ps="#"; us=""; tf="a";
+ } else {
+ ps=""; us="_"; tf="x";
+ }
+ }
+ NR == 1 && NF == 4 {
+ mode = $1; rem = $2; most = $3; count = $4;
+ suffix[1] = ".b"; suffix[2] = ".h"; suffix[4] = "";
+
+ prev = align = most;
+ ld = align; st = 0; total = count - rem - most;
+ evenp = int(total/align) % 2;
+ printf "; The following was calculated using awk.\n";
+ printf "\ttext\n";
+ printf "\talign\t16\n";
+ for (bytes = total; bytes >= 0; bytes -= align) {
+ if (bytes < align) {
+ if (bytes >= 2) align = 2;
+ else align = 1;
+ }
+ name = sprintf("__%smovstr%s%dx%d", us, mode, total + most, bytes + most);
+ if (bytes > most) {
+ printf "\tglobal\t%s\n", name;
+ printf "%s:\n", name;
+ }
+ if (bytes == 0)
+ printf "\tjmp.n\t%sr1\n", ps;
+ else
+ printf "\tld%s\t%sr%d,%sr3,%d\n", suffix[align], ps, 4 + evenp, ps, ld;
+ printf "\tst%s\t%sr%d,%sr2,%d\n", suffix[prev], ps, 5 - evenp, ps, st;
+ ld += align; st += prev; prev = align;
+ if (evenp)
+ evenp = 0;
+ else
+ evenp = 1;
+ }
+ if (!no_tdesc) {
+ printf "end%s%dx:\n", mode, total + most;
+ printf "\tsection\t.tdesc,\"%s\"\n", tf;
+ printf "\tword\t0x42\n";
+ printf "\tword\t1\n";
+ printf "\tword\t__%smovstr%s%dx%d\n", us, mode, total + most, total + most;
+ printf "\tword\tend%s%dx\n", mode, total + most;
+ printf "\tword\t0x0100001f\n";
+ printf "\tword\t0\n";
+ printf "\tword\t1\n";
+ printf "\tword\t0\n";
+ printf "\ttext\n";
+ }
+ printf "; End of awk generated code.\n"
+ exit;
+ }'
+}
+
+(do_file '"movstrSI47x.s"';
+ echo 'SI:1:4:48' | gen_movstrXr) > movstrSI47x.asm
+(do_file '"movstrSI46x.s"';
+ echo 'SI:2:4:48' | gen_movstrXr) > movstrSI46x.asm
+(do_file '"movstrSI45x.s"';
+ echo 'SI:3:4:48' | gen_movstrXr) > movstrSI45x.asm
+(do_file '"movstrHI15x.s"';
+ echo 'HI:1:2:16' | gen_movstrXr) > movstrHI15x.asm
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