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Diffstat (limited to 'openssl/crypto/bn/asm/mips3-mont.pl')
| -rw-r--r-- | openssl/crypto/bn/asm/mips3-mont.pl | 327 |
1 files changed, 327 insertions, 0 deletions
diff --git a/openssl/crypto/bn/asm/mips3-mont.pl b/openssl/crypto/bn/asm/mips3-mont.pl new file mode 100644 index 000000000..8f9156e02 --- /dev/null +++ b/openssl/crypto/bn/asm/mips3-mont.pl @@ -0,0 +1,327 @@ +#!/usr/bin/env perl +# +# ==================================================================== +# Written by Andy Polyakov <appro@fy.chalmers.se> for the OpenSSL +# project. The module is, however, dual licensed under OpenSSL and +# CRYPTOGAMS licenses depending on where you obtain it. For further +# details see http://www.openssl.org/~appro/cryptogams/. +# ==================================================================== + +# This module doesn't present direct interest for OpenSSL, because it +# doesn't provide better performance for longer keys. While 512-bit +# RSA private key operations are 40% faster, 1024-bit ones are hardly +# faster at all, while longer key operations are slower by up to 20%. +# It might be of interest to embedded system developers though, as +# it's smaller than 1KB, yet offers ~3x improvement over compiler +# generated code. +# +# The module targets N32 and N64 MIPS ABIs and currently is a bit +# IRIX-centric, i.e. is likely to require adaptation for other OSes. + +# int bn_mul_mont( +$rp="a0"; # BN_ULONG *rp, +$ap="a1"; # const BN_ULONG *ap, +$bp="a2"; # const BN_ULONG *bp, +$np="a3"; # const BN_ULONG *np, +$n0="a4"; # const BN_ULONG *n0, +$num="a5"; # int num); + +$lo0="a6"; +$hi0="a7"; +$lo1="v0"; +$hi1="v1"; +$aj="t0"; +$bi="t1"; +$nj="t2"; +$tp="t3"; +$alo="s0"; +$ahi="s1"; +$nlo="s2"; +$nhi="s3"; +$tj="s4"; +$i="s5"; +$j="s6"; +$fp="t8"; +$m1="t9"; + +$FRAME=8*(2+8); + +$code=<<___; +#include <asm.h> +#include <regdef.h> + +.text + +.set noat +.set reorder + +.align 5 +.globl bn_mul_mont +.ent bn_mul_mont +bn_mul_mont: + .set noreorder + PTR_SUB sp,64 + move $fp,sp + .frame $fp,64,ra + slt AT,$num,4 + li v0,0 + beqzl AT,.Lproceed + nop + jr ra + PTR_ADD sp,$fp,64 + .set reorder +.align 5 +.Lproceed: + ld $n0,0($n0) + ld $bi,0($bp) # bp[0] + ld $aj,0($ap) # ap[0] + ld $nj,0($np) # np[0] + PTR_SUB sp,16 # place for two extra words + sll $num,3 + li AT,-4096 + PTR_SUB sp,$num + and sp,AT + + sd s0,0($fp) + sd s1,8($fp) + sd s2,16($fp) + sd s3,24($fp) + sd s4,32($fp) + sd s5,40($fp) + sd s6,48($fp) + sd s7,56($fp) + + dmultu $aj,$bi + ld $alo,8($ap) + ld $nlo,8($np) + mflo $lo0 + mfhi $hi0 + dmultu $lo0,$n0 + mflo $m1 + + dmultu $alo,$bi + mflo $alo + mfhi $ahi + + dmultu $nj,$m1 + mflo $lo1 + mfhi $hi1 + dmultu $nlo,$m1 + daddu $lo1,$lo0 + sltu AT,$lo1,$lo0 + daddu $hi1,AT + mflo $nlo + mfhi $nhi + + move $tp,sp + li $j,16 +.align 4 +.L1st: + .set noreorder + PTR_ADD $aj,$ap,$j + ld $aj,($aj) + PTR_ADD $nj,$np,$j + ld $nj,($nj) + + dmultu $aj,$bi + daddu $lo0,$alo,$hi0 + daddu $lo1,$nlo,$hi1 + sltu AT,$lo0,$hi0 + sltu s7,$lo1,$hi1 + daddu $hi0,$ahi,AT + daddu $hi1,$nhi,s7 + mflo $alo + mfhi $ahi + + daddu $lo1,$lo0 + sltu AT,$lo1,$lo0 + dmultu $nj,$m1 + daddu $hi1,AT + addu $j,8 + sd $lo1,($tp) + sltu s7,$j,$num + mflo $nlo + mfhi $nhi + + bnez s7,.L1st + PTR_ADD $tp,8 + .set reorder + + daddu $lo0,$alo,$hi0 + sltu AT,$lo0,$hi0 + daddu $hi0,$ahi,AT + + daddu $lo1,$nlo,$hi1 + sltu s7,$lo1,$hi1 + daddu $hi1,$nhi,s7 + daddu $lo1,$lo0 + sltu AT,$lo1,$lo0 + daddu $hi1,AT + + sd $lo1,($tp) + + daddu $hi1,$hi0 + sltu AT,$hi1,$hi0 + sd $hi1,8($tp) + sd AT,16($tp) + + li $i,8 +.align 4 +.Louter: + PTR_ADD $bi,$bp,$i + ld $bi,($bi) + ld $aj,($ap) + ld $alo,8($ap) + ld $tj,(sp) + + dmultu $aj,$bi + ld $nj,($np) + ld $nlo,8($np) + mflo $lo0 + mfhi $hi0 + daddu $lo0,$tj + dmultu $lo0,$n0 + sltu AT,$lo0,$tj + daddu $hi0,AT + mflo $m1 + + dmultu $alo,$bi + mflo $alo + mfhi $ahi + + dmultu $nj,$m1 + mflo $lo1 + mfhi $hi1 + + dmultu $nlo,$m1 + daddu $lo1,$lo0 + sltu AT,$lo1,$lo0 + daddu $hi1,AT + mflo $nlo + mfhi $nhi + + move $tp,sp + li $j,16 + ld $tj,8($tp) +.align 4 +.Linner: + .set noreorder + PTR_ADD $aj,$ap,$j + ld $aj,($aj) + PTR_ADD $nj,$np,$j + ld $nj,($nj) + + dmultu $aj,$bi + daddu $lo0,$alo,$hi0 + daddu $lo1,$nlo,$hi1 + sltu AT,$lo0,$hi0 + sltu s7,$lo1,$hi1 + daddu $hi0,$ahi,AT + daddu $hi1,$nhi,s7 + mflo $alo + mfhi $ahi + + daddu $lo0,$tj + addu $j,8 + dmultu $nj,$m1 + sltu AT,$lo0,$tj + daddu $lo1,$lo0 + daddu $hi0,AT + sltu s7,$lo1,$lo0 + ld $tj,16($tp) + daddu $hi1,s7 + sltu AT,$j,$num + mflo $nlo + mfhi $nhi + sd $lo1,($tp) + bnez AT,.Linner + PTR_ADD $tp,8 + .set reorder + + daddu $lo0,$alo,$hi0 + sltu AT,$lo0,$hi0 + daddu $hi0,$ahi,AT + daddu $lo0,$tj + sltu s7,$lo0,$tj + daddu $hi0,s7 + + ld $tj,16($tp) + daddu $lo1,$nlo,$hi1 + sltu AT,$lo1,$hi1 + daddu $hi1,$nhi,AT + daddu $lo1,$lo0 + sltu s7,$lo1,$lo0 + daddu $hi1,s7 + sd $lo1,($tp) + + daddu $lo1,$hi1,$hi0 + sltu $hi1,$lo1,$hi0 + daddu $lo1,$tj + sltu AT,$lo1,$tj + daddu $hi1,AT + sd $lo1,8($tp) + sd $hi1,16($tp) + + addu $i,8 + sltu s7,$i,$num + bnez s7,.Louter + + .set noreorder + PTR_ADD $tj,sp,$num # &tp[num] + move $tp,sp + move $ap,sp + li $hi0,0 # clear borrow bit + +.align 4 +.Lsub: ld $lo0,($tp) + ld $lo1,($np) + PTR_ADD $tp,8 + PTR_ADD $np,8 + dsubu $lo1,$lo0,$lo1 # tp[i]-np[i] + sgtu AT,$lo1,$lo0 + dsubu $lo0,$lo1,$hi0 + sgtu $hi0,$lo0,$lo1 + sd $lo0,($rp) + or $hi0,AT + sltu AT,$tp,$tj + bnez AT,.Lsub + PTR_ADD $rp,8 + + dsubu $hi0,$hi1,$hi0 # handle upmost overflow bit + move $tp,sp + PTR_SUB $rp,$num # restore rp + not $hi1,$hi0 + + and $ap,$hi0,sp + and $bp,$hi1,$rp + or $ap,$ap,$bp # ap=borrow?tp:rp + +.align 4 +.Lcopy: ld $aj,($ap) + PTR_ADD $ap,8 + PTR_ADD $tp,8 + sd zero,-8($tp) + sltu AT,$tp,$tj + sd $aj,($rp) + bnez AT,.Lcopy + PTR_ADD $rp,8 + + ld s0,0($fp) + ld s1,8($fp) + ld s2,16($fp) + ld s3,24($fp) + ld s4,32($fp) + ld s5,40($fp) + ld s6,48($fp) + ld s7,56($fp) + li v0,1 + jr ra + PTR_ADD sp,$fp,64 + .set reorder +END(bn_mul_mont) +.rdata +.asciiz "Montgomery Multiplication for MIPS III/IV, CRYPTOGAMS by <appro\@openssl.org>" +___ + +print $code; +close STDOUT; |