diff options
Diffstat (limited to 'crypto/bn/asm/co-alpha.pl')
| -rw-r--r-- | crypto/bn/asm/co-alpha.pl | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/crypto/bn/asm/co-alpha.pl b/crypto/bn/asm/co-alpha.pl new file mode 100644 index 000000000000..67dad3e3d5fb --- /dev/null +++ b/crypto/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); + } + |