1 files changed, 116 insertions, 0 deletions

diff --git a/src/lib/libcrypto/bn/asm/co-alpha.pl b/src/lib/libcrypto/bn/asm/co-alpha.pl
new file mode 100644
index 0000000000..67dad3e3d5
--- /dev/null
+++ b/src/lib/libcrypto/bn/asm/co-alpha.pl
@@ -0,0 +1,116 @@
+#!/usr/local/bin/perl
+# I have this in perl so I can use more usefull register names and then convert
+# them into alpha registers.
+#
+
+push(@INC,"perlasm","../../perlasm");
+require "alpha.pl";
+
+&asm_init($ARGV[0],$0);
+
+print &bn_sub_words("bn_sub_words");
+
+&asm_finish();
+
+sub bn_sub_words
+        {
+        local($name)=@_;
+        local($cc,$a,$b,$r);
+
+        $cc="r0";
+        $a0="r1"; $b0="r5"; $r0="r9";  $tmp="r13";
+        $a1="r2"; $b1="r6"; $r1="r10"; $t1="r14";
+        $a2="r3"; $b2="r7"; $r2="r11";
+        $a3="r4"; $b3="r8"; $r3="r12"; $t3="r15";
+
+        $rp=&wparam(0);
+        $ap=&wparam(1);
+        $bp=&wparam(2);
+        $count=&wparam(3);
+
+        &function_begin($name,"");
+
+        &comment("");
+        &sub($count,4,$count);
+        &mov("zero",$cc);
+        &blt($count,&label("finish"));
+
+        &ld($a0,&QWPw(0,$ap));
+        &ld($b0,&QWPw(0,$bp));
+
+##########################################################
+        &set_label("loop");
+
+        &ld($a1,&QWPw(1,$ap));
+         &cmpult($a0,$b0,$tmp); # will we borrow?
+        &ld($b1,&QWPw(1,$bp));
+         &sub($a0,$b0,$a0);             # do the subtract
+        &ld($a2,&QWPw(2,$ap));
+         &cmpult($a0,$cc,$b0);  # will we borrow?
+        &ld($b2,&QWPw(2,$bp));
+         &sub($a0,$cc,$a0);     # will we borrow?
+        &ld($a3,&QWPw(3,$ap));
+         &add($b0,$tmp,$cc);    # add the borrows
+
+        &cmpult($a1,$b1,$t1);   # will we borrow?
+         &sub($a1,$b1,$a1);     # do the subtract
+        &ld($b3,&QWPw(3,$bp));
+         &cmpult($a1,$cc,$b1);  # will we borrow?
+        &sub($a1,$cc,$a1);      # will we borrow?
+         &add($b1,$t1,$cc);     # add the borrows
+
+        &cmpult($a2,$b2,$tmp);  # will we borrow?
+         &sub($a2,$b2,$a2);             # do the subtract
+        &st($a0,&QWPw(0,$rp));  # save
+         &cmpult($a2,$cc,$b2);  # will we borrow?
+        &sub($a2,$cc,$a2);      # will we borrow?
+         &add($b2,$tmp,$cc);    # add the borrows
+
+        &cmpult($a3,$b3,$t3);   # will we borrow?
+         &sub($a3,$b3,$a3);             # do the subtract
+        &st($a1,&QWPw(1,$rp));  # save
+         &cmpult($a3,$cc,$b3);  # will we borrow?
+        &sub($a3,$cc,$a3);      # will we borrow?
+         &add($b3,$t3,$cc);     # add the borrows
+
+        &st($a2,&QWPw(2,$rp));  # save
+         &sub($count,4,$count); # count-=4
+        &st($a3,&QWPw(3,$rp));  # save
+         &add($ap,4*$QWS,$ap);  # count+=4
+        &add($bp,4*$QWS,$bp);   # count+=4
+         &add($rp,4*$QWS,$rp);  # count+=4
+
+        &blt($count,&label("finish"));
+        &ld($a0,&QWPw(0,$ap));
+         &ld($b0,&QWPw(0,$bp));
+        &br(&label("loop"));
+##################################################
+        # Do the last 0..3 words
+
+        &set_label("last_loop");
+
+        &ld($a0,&QWPw(0,$ap));  # get a
+         &ld($b0,&QWPw(0,$bp)); # get b
+        &cmpult($a0,$b0,$tmp);  # will we borrow?
+        &sub($a0,$b0,$a0);      # do the subtract
+        &cmpult($a0,$cc,$b0);   # will we borrow?
+        &sub($a0,$cc,$a0);      # will we borrow?
+        &st($a0,&QWPw(0,$rp));  # save
+        &add($b0,$tmp,$cc);     # add the borrows
+
+        &add($ap,$QWS,$ap);
+        &add($bp,$QWS,$bp);
+        &add($rp,$QWS,$rp);
+        &sub($count,1,$count);
+        &bgt($count,&label("last_loop"));
+        &function_end_A($name);
+
+######################################################
+        &set_label("finish");
+        &add($count,4,$count);
+        &bgt($count,&label("last_loop"));
+
+        &set_label("end");
+        &function_end($name);
+        }
+