crypto/bn/asm/alpha/mul.pl

   1 #!/usr/local/bin/perl
   2 # alpha assember
   3
   4 sub bn_mul_words
   5         {
   6         local($name)=@_;
   7         local($cc,$a,$b,$r,$couny);
   8
   9         &init_pool(4);
  10         ($cc)=GR("r0");
  11
  12         $rp=&wparam(0);
  13         $ap=&wparam(1);
  14         $count=&wparam(2);
  15         $word=&wparam(3);
  16
  17         &function_begin($name,"");
  18
  19         &comment("");
  20         &sub($count,4,$count);
  21          &mov("zero",$cc);
  22         ###
  23          &blt($count,&label("finish"));
  24
  25         ($a0)=&NR(1); &ld($a0,&QWPw(0,$ap));
  26
  27         &set_label("loop");
  28
  29         ($a1)=&NR(1); &ld($a1,&QWPw(1,$ap));
  30          ($a2)=&NR(1); &ld($a2,&QWPw(2,$ap));
  31
  32         &muh($a0,$word,($h0)=&NR(1));   &FR($a0);
  33          ($a3)=&NR(1); &ld($a3,&QWPw(3,$ap));
  34                                                         ### wait 8
  35         &mul($a0,$word,($l0)=&NR(1));   &FR($a0);
  36                                                         ### wait 8
  37         &muh($a1,$word,($h1)=&NR(1));   &FR($a1);
  38          &add($l0,$cc,$l0);                             ### wait 8
  39         &mul($a1,$word,($l1)=&NR(1));   &FR($a1);
  40          &cmpult($l0,$cc,$cc);                          ### wait 8
  41         &muh($a2,$word,($h2)=&NR(1));   &FR($a2);
  42          &add($h0,$cc,$cc);     &FR($h0);               ### wait 8
  43         &mul($a2,$word,($l2)=&NR(1));   &FR($a2);
  44          &add($l1,$cc,$l1);                             ### wait 8
  45         &st($l0,&QWPw(0,$rp));          &FR($l0);
  46          &cmpult($l1,$cc,$cc);                          ### wait 8
  47         &muh($a3,$word,($h3)=&NR(1));   &FR($a3);
  48          &add($h1,$cc,$cc);             &FR($h1);
  49         &mul($a3,$word,($l3)=&NR(1));   &FR($a3);
  50          &add($l2,$cc,$l2);
  51         &st($l1,&QWPw(1,$rp));          &FR($l1);
  52          &cmpult($l2,$cc,$cc);
  53         &add($h2,$cc,$cc);              &FR($h2);
  54          &sub($count,4,$count); # count-=4
  55         &st($l2,&QWPw(2,$rp));          &FR($l2);
  56          &add($l3,$cc,$l3);
  57         &cmpult($l3,$cc,$cc);
  58          &add($bp,4*$QWS,$bp);  # count+=4
  59         &add($h3,$cc,$cc);              &FR($h3);
  60          &add($ap,4*$QWS,$ap);  # count+=4
  61         &st($l3,&QWPw(3,$rp));          &FR($l3);
  62          &add($rp,4*$QWS,$rp);  # count+=4
  63         ###
  64          &blt($count,&label("finish"));
  65          ($a0)=&NR(1); &ld($a0,&QWPw(0,$ap));
  66         &br(&label("finish"));
  67 ##################################################
  68
  69 ##################################################
  70         # Do the last 0..3 words
  71
  72         &set_label("last_loop");
  73
  74         &ld(($a0)=&NR(1),&QWPw(0,$ap)); # get a
  75          ###
  76         ###
  77          ###
  78         &muh($a0,$word,($h0)=&NR(1));
  79          ### Wait 8 for next mul issue
  80         &mul($a0,$word,($l0)=&NR(1)); &FR($a0)
  81          &add($ap,$QWS,$ap);
  82         ### Loose 12 until result is available
  83         &add($rp,$QWS,$rp);
  84          &sub($count,1,$count);
  85         &add($l0,$cc,$l0);
  86          ###
  87         &st($l0,&QWPw(-1,$rp));         &FR($l0);
  88          &cmpult($l0,$cc,$cc);
  89         &add($h0,$cc,$cc);              &FR($h0);
  90          &bgt($count,&label("last_loop"));
  91         &function_end_A($name);
  92
  93 ######################################################
  94         &set_label("finish");
  95         &add($count,4,$count);
  96         &bgt($count,&label("last_loop"));
  97
  98         &set_label("end");
  99         &function_end($name);
 100
 101         &fin_pool;
 102         }
 103
 104 1;