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Diffstat (limited to 'openssl/crypto/bn/asm/mips-mont.pl')
| -rw-r--r-- | openssl/crypto/bn/asm/mips-mont.pl | 426 |
1 files changed, 426 insertions, 0 deletions
diff --git a/openssl/crypto/bn/asm/mips-mont.pl b/openssl/crypto/bn/asm/mips-mont.pl new file mode 100644 index 000000000..b944a12b8 --- /dev/null +++ b/openssl/crypto/bn/asm/mips-mont.pl @@ -0,0 +1,426 @@ +#!/usr/bin/env perl +# +# ==================================================================== +# Written by Andy Polyakov <appro@openssl.org> 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, at least not on +# in-order-execution cores. While 512-bit RSA sign operations can be +# 65% faster in 64-bit mode, 1024-bit ones are only 15% faster, and +# 4096-bit ones are up to 15% slower. In 32-bit mode it varies from +# 16% improvement for 512-bit RSA sign to -33% for 4096-bit RSA +# verify:-( All comparisons are against bn_mul_mont-free assembler. +# The module might be of interest to embedded system developers, as +# the code is smaller than 1KB, yet offers >3x improvement on MIPS64 +# and 75-30% [less for longer keys] on MIPS32 over compiler-generated +# code. + +###################################################################### +# There is a number of MIPS ABI in use, O32 and N32/64 are most +# widely used. Then there is a new contender: NUBI. It appears that if +# one picks the latter, it's possible to arrange code in ABI neutral +# manner. Therefore let's stick to NUBI register layout: +# +($zero,$at,$t0,$t1,$t2)=map("\$$_",(0..2,24,25)); +($a0,$a1,$a2,$a3,$a4,$a5,$a6,$a7)=map("\$$_",(4..11)); +($s0,$s1,$s2,$s3,$s4,$s5,$s6,$s7,$s8,$s9,$s10,$s11)=map("\$$_",(12..23)); +($gp,$tp,$sp,$fp,$ra)=map("\$$_",(3,28..31)); +# +# The return value is placed in $a0. Following coding rules facilitate +# interoperability: +# +# - never ever touch $tp, "thread pointer", former $gp; +# - copy return value to $t0, former $v0 [or to $a0 if you're adapting +# old code]; +# - on O32 populate $a4-$a7 with 'lw $aN,4*N($sp)' if necessary; +# +# For reference here is register layout for N32/64 MIPS ABIs: +# +# ($zero,$at,$v0,$v1)=map("\$$_",(0..3)); +# ($a0,$a1,$a2,$a3,$a4,$a5,$a6,$a7)=map("\$$_",(4..11)); +# ($t0,$t1,$t2,$t3,$t8,$t9)=map("\$$_",(12..15,24,25)); +# ($s0,$s1,$s2,$s3,$s4,$s5,$s6,$s7)=map("\$$_",(16..23)); +# ($gp,$sp,$fp,$ra)=map("\$$_",(28..31)); +# +$flavour = shift; # supported flavours are o32,n32,64,nubi32,nubi64 + +if ($flavour =~ /64|n32/i) { + $PTR_ADD="dadd"; # incidentally works even on n32 + $PTR_SUB="dsub"; # incidentally works even on n32 + $REG_S="sd"; + $REG_L="ld"; + $SZREG=8; +} else { + $PTR_ADD="add"; + $PTR_SUB="sub"; + $REG_S="sw"; + $REG_L="lw"; + $SZREG=4; +} +$SAVED_REGS_MASK = ($flavour =~ /nubi/i) ? 0x00fff000 : 0x00ff0000; +# +# <appro@openssl.org> +# +###################################################################### + +while (($output=shift) && ($output!~/^\w[\w\-]*\.\w+$/)) {} +open STDOUT,">$output"; + +if ($flavour =~ /64|n32/i) { + $LD="ld"; + $ST="sd"; + $MULTU="dmultu"; + $ADDU="daddu"; + $SUBU="dsubu"; + $BNSZ=8; +} else { + $LD="lw"; + $ST="sw"; + $MULTU="multu"; + $ADDU="addu"; + $SUBU="subu"; + $BNSZ=4; +} + +# int bn_mul_mont( +$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=$t1; +$hi1=$t2; +$aj=$s0; +$bi=$s1; +$nj=$s2; +$tp=$s3; +$alo=$s4; +$ahi=$s5; +$nlo=$s6; +$nhi=$s7; +$tj=$s8; +$i=$s9; +$j=$s10; +$m1=$s11; + +$FRAMESIZE=14; + +$code=<<___; +.text + +.set noat +.set noreorder + +.align 5 +.globl bn_mul_mont +.ent bn_mul_mont +bn_mul_mont: +___ +$code.=<<___ if ($flavour =~ /o32/i); + lw $n0,16($sp) + lw $num,20($sp) +___ +$code.=<<___; + slt $at,$num,4 + bnez $at,1f + li $t0,0 + slt $at,$num,17 # on in-order CPU + bnezl $at,bn_mul_mont_internal + nop +1: jr $ra + li $a0,0 +.end bn_mul_mont + +.align 5 +.ent bn_mul_mont_internal +bn_mul_mont_internal: + .frame $fp,$FRAMESIZE*$SZREG,$ra + .mask 0x40000000|$SAVED_REGS_MASK,-$SZREG + $PTR_SUB $sp,$FRAMESIZE*$SZREG + $REG_S $fp,($FRAMESIZE-1)*$SZREG($sp) + $REG_S $s11,($FRAMESIZE-2)*$SZREG($sp) + $REG_S $s10,($FRAMESIZE-3)*$SZREG($sp) + $REG_S $s9,($FRAMESIZE-4)*$SZREG($sp) + $REG_S $s8,($FRAMESIZE-5)*$SZREG($sp) + $REG_S $s7,($FRAMESIZE-6)*$SZREG($sp) + $REG_S $s6,($FRAMESIZE-7)*$SZREG($sp) + $REG_S $s5,($FRAMESIZE-8)*$SZREG($sp) + $REG_S $s4,($FRAMESIZE-9)*$SZREG($sp) +___ +$code.=<<___ if ($flavour =~ /nubi/i); + $REG_S $s3,($FRAMESIZE-10)*$SZREG($sp) + $REG_S $s2,($FRAMESIZE-11)*$SZREG($sp) + $REG_S $s1,($FRAMESIZE-12)*$SZREG($sp) + $REG_S $s0,($FRAMESIZE-13)*$SZREG($sp) +___ +$code.=<<___; + move $fp,$sp + + .set reorder + $LD $n0,0($n0) + $LD $bi,0($bp) # bp[0] + $LD $aj,0($ap) # ap[0] + $LD $nj,0($np) # np[0] + + $PTR_SUB $sp,2*$BNSZ # place for two extra words + sll $num,`log($BNSZ)/log(2)` + li $at,-4096 + $PTR_SUB $sp,$num + and $sp,$at + + $MULTU $aj,$bi + $LD $alo,$BNSZ($ap) + $LD $nlo,$BNSZ($np) + mflo $lo0 + mfhi $hi0 + $MULTU $lo0,$n0 + mflo $m1 + + $MULTU $alo,$bi + mflo $alo + mfhi $ahi + + $MULTU $nj,$m1 + mflo $lo1 + mfhi $hi1 + $MULTU $nlo,$m1 + $ADDU $lo1,$lo0 + sltu $at,$lo1,$lo0 + $ADDU $hi1,$at + mflo $nlo + mfhi $nhi + + move $tp,$sp + li $j,2*$BNSZ +.align 4 +.L1st: + .set noreorder + $PTR_ADD $aj,$ap,$j + $PTR_ADD $nj,$np,$j + $LD $aj,($aj) + $LD $nj,($nj) + + $MULTU $aj,$bi + $ADDU $lo0,$alo,$hi0 + $ADDU $lo1,$nlo,$hi1 + sltu $at,$lo0,$hi0 + sltu $t0,$lo1,$hi1 + $ADDU $hi0,$ahi,$at + $ADDU $hi1,$nhi,$t0 + mflo $alo + mfhi $ahi + + $ADDU $lo1,$lo0 + sltu $at,$lo1,$lo0 + $MULTU $nj,$m1 + $ADDU $hi1,$at + addu $j,$BNSZ + $ST $lo1,($tp) + sltu $t0,$j,$num + mflo $nlo + mfhi $nhi + + bnez $t0,.L1st + $PTR_ADD $tp,$BNSZ + .set reorder + + $ADDU $lo0,$alo,$hi0 + sltu $at,$lo0,$hi0 + $ADDU $hi0,$ahi,$at + + $ADDU $lo1,$nlo,$hi1 + sltu $t0,$lo1,$hi1 + $ADDU $hi1,$nhi,$t0 + $ADDU $lo1,$lo0 + sltu $at,$lo1,$lo0 + $ADDU $hi1,$at + + $ST $lo1,($tp) + + $ADDU $hi1,$hi0 + sltu $at,$hi1,$hi0 + $ST $hi1,$BNSZ($tp) + $ST $at,2*$BNSZ($tp) + + li $i,$BNSZ +.align 4 +.Louter: + $PTR_ADD $bi,$bp,$i + $LD $bi,($bi) + $LD $aj,($ap) + $LD $alo,$BNSZ($ap) + $LD $tj,($sp) + + $MULTU $aj,$bi + $LD $nj,($np) + $LD $nlo,$BNSZ($np) + mflo $lo0 + mfhi $hi0 + $ADDU $lo0,$tj + $MULTU $lo0,$n0 + sltu $at,$lo0,$tj + $ADDU $hi0,$at + mflo $m1 + + $MULTU $alo,$bi + mflo $alo + mfhi $ahi + + $MULTU $nj,$m1 + mflo $lo1 + mfhi $hi1 + + $MULTU $nlo,$m1 + $ADDU $lo1,$lo0 + sltu $at,$lo1,$lo0 + $ADDU $hi1,$at + mflo $nlo + mfhi $nhi + + move $tp,$sp + li $j,2*$BNSZ + $LD $tj,$BNSZ($tp) +.align 4 +.Linner: + .set noreorder + $PTR_ADD $aj,$ap,$j + $PTR_ADD $nj,$np,$j + $LD $aj,($aj) + $LD $nj,($nj) + + $MULTU $aj,$bi + $ADDU $lo0,$alo,$hi0 + $ADDU $lo1,$nlo,$hi1 + sltu $at,$lo0,$hi0 + sltu $t0,$lo1,$hi1 + $ADDU $hi0,$ahi,$at + $ADDU $hi1,$nhi,$t0 + mflo $alo + mfhi $ahi + + $ADDU $lo0,$tj + addu $j,$BNSZ + $MULTU $nj,$m1 + sltu $at,$lo0,$tj + $ADDU $lo1,$lo0 + $ADDU $hi0,$at + sltu $t0,$lo1,$lo0 + $LD $tj,2*$BNSZ($tp) + $ADDU $hi1,$t0 + sltu $at,$j,$num + mflo $nlo + mfhi $nhi + $ST $lo1,($tp) + bnez $at,.Linner + $PTR_ADD $tp,$BNSZ + .set reorder + + $ADDU $lo0,$alo,$hi0 + sltu $at,$lo0,$hi0 + $ADDU $hi0,$ahi,$at + $ADDU $lo0,$tj + sltu $t0,$lo0,$tj + $ADDU $hi0,$t0 + + $LD $tj,2*$BNSZ($tp) + $ADDU $lo1,$nlo,$hi1 + sltu $at,$lo1,$hi1 + $ADDU $hi1,$nhi,$at + $ADDU $lo1,$lo0 + sltu $t0,$lo1,$lo0 + $ADDU $hi1,$t0 + $ST $lo1,($tp) + + $ADDU $lo1,$hi1,$hi0 + sltu $hi1,$lo1,$hi0 + $ADDU $lo1,$tj + sltu $at,$lo1,$tj + $ADDU $hi1,$at + $ST $lo1,$BNSZ($tp) + $ST $hi1,2*$BNSZ($tp) + + addu $i,$BNSZ + sltu $t0,$i,$num + bnez $t0,.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 $tp,$BNSZ + $PTR_ADD $np,$BNSZ + $SUBU $lo1,$lo0,$lo1 # tp[i]-np[i] + sgtu $at,$lo1,$lo0 + $SUBU $lo0,$lo1,$hi0 + sgtu $hi0,$lo0,$lo1 + $ST $lo0,($rp) + or $hi0,$at + sltu $at,$tp,$tj + bnez $at,.Lsub + $PTR_ADD $rp,$BNSZ + + $SUBU $hi0,$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 $ap,$BNSZ + $ST $zero,($tp) + $PTR_ADD $tp,$BNSZ + sltu $at,$tp,$tj + $ST $aj,($rp) + bnez $at,.Lcopy + $PTR_ADD $rp,$BNSZ + + li $a0,1 + li $t0,1 + + .set noreorder + move $sp,$fp + $REG_L $fp,($FRAMESIZE-1)*$SZREG($sp) + $REG_L $s11,($FRAMESIZE-2)*$SZREG($sp) + $REG_L $s10,($FRAMESIZE-3)*$SZREG($sp) + $REG_L $s9,($FRAMESIZE-4)*$SZREG($sp) + $REG_L $s8,($FRAMESIZE-5)*$SZREG($sp) + $REG_L $s7,($FRAMESIZE-6)*$SZREG($sp) + $REG_L $s6,($FRAMESIZE-7)*$SZREG($sp) + $REG_L $s5,($FRAMESIZE-8)*$SZREG($sp) + $REG_L $s4,($FRAMESIZE-9)*$SZREG($sp) +___ +$code.=<<___ if ($flavour =~ /nubi/i); + $REG_L $s3,($FRAMESIZE-10)*$SZREG($sp) + $REG_L $s2,($FRAMESIZE-11)*$SZREG($sp) + $REG_L $s1,($FRAMESIZE-12)*$SZREG($sp) + $REG_L $s0,($FRAMESIZE-13)*$SZREG($sp) +___ +$code.=<<___; + jr $ra + $PTR_ADD $sp,$FRAMESIZE*$SZREG +.end bn_mul_mont_internal +.rdata +.asciiz "Montgomery Multiplication for MIPS, CRYPTOGAMS by <appro\@openssl.org>" +___ + +$code =~ s/\`([^\`]*)\`/eval $1/gem; + +print $code; +close STDOUT; |