diff options
Diffstat (limited to 'app/openssl/crypto/modes/asm/ghash-armv4.pl')
| -rw-r--r-- | app/openssl/crypto/modes/asm/ghash-armv4.pl | 229 |
1 files changed, 83 insertions, 146 deletions
diff --git a/app/openssl/crypto/modes/asm/ghash-armv4.pl b/app/openssl/crypto/modes/asm/ghash-armv4.pl index b79ecbcc..e46f8e34 100644 --- a/app/openssl/crypto/modes/asm/ghash-armv4.pl +++ b/app/openssl/crypto/modes/asm/ghash-armv4.pl @@ -35,20 +35,6 @@ # Add NEON implementation featuring polynomial multiplication, i.e. no # lookup tables involved. On Cortex A8 it was measured to process one # byte in 15 cycles or 55% faster than integer-only code. -# -# April 2014 -# -# Switch to multiplication algorithm suggested in paper referred -# below and combine it with reduction algorithm from x86 module. -# Performance improvement over previous version varies from 65% on -# Snapdragon S4 to 110% on Cortex A9. In absolute terms Cortex A8 -# processes one byte in 8.45 cycles, A9 - in 10.2, Snapdragon S4 - -# in 9.33. -# -# Câmara, D.; Gouvêa, C. P. L.; López, J. & Dahab, R.: Fast Software -# Polynomial Multiplication on ARM Processors using the NEON Engine. -# -# http://conradoplg.cryptoland.net/files/2010/12/mocrysen13.pdf # ==================================================================== # Note about "528B" variant. In ARM case it makes lesser sense to @@ -317,160 +303,117 @@ $code.=<<___; .size gcm_gmult_4bit,.-gcm_gmult_4bit ___ { -my ($Xl,$Xm,$Xh,$IN)=map("q$_",(0..3)); -my ($t0,$t1,$t2,$t3)=map("q$_",(8..12)); -my ($Hlo,$Hhi,$Hhl,$k48,$k32,$k16)=map("d$_",(26..31)); +my $cnt=$Htbl; # $Htbl is used once in the very beginning -sub clmul64x64 { -my ($r,$a,$b)=@_; -$code.=<<___; - vext.8 $t0#lo, $a, $a, #1 @ A1 - vmull.p8 $t0, $t0#lo, $b @ F = A1*B - vext.8 $r#lo, $b, $b, #1 @ B1 - vmull.p8 $r, $a, $r#lo @ E = A*B1 - vext.8 $t1#lo, $a, $a, #2 @ A2 - vmull.p8 $t1, $t1#lo, $b @ H = A2*B - vext.8 $t3#lo, $b, $b, #2 @ B2 - vmull.p8 $t3, $a, $t3#lo @ G = A*B2 - vext.8 $t2#lo, $a, $a, #3 @ A3 - veor $t0, $t0, $r @ L = E + F - vmull.p8 $t2, $t2#lo, $b @ J = A3*B - vext.8 $r#lo, $b, $b, #3 @ B3 - veor $t1, $t1, $t3 @ M = G + H - vmull.p8 $r, $a, $r#lo @ I = A*B3 - veor $t0#lo, $t0#lo, $t0#hi @ t0 = (L) (P0 + P1) << 8 - vand $t0#hi, $t0#hi, $k48 - vext.8 $t3#lo, $b, $b, #4 @ B4 - veor $t1#lo, $t1#lo, $t1#hi @ t1 = (M) (P2 + P3) << 16 - vand $t1#hi, $t1#hi, $k32 - vmull.p8 $t3, $a, $t3#lo @ K = A*B4 - veor $t2, $t2, $r @ N = I + J - veor $t0#lo, $t0#lo, $t0#hi - veor $t1#lo, $t1#lo, $t1#hi - veor $t2#lo, $t2#lo, $t2#hi @ t2 = (N) (P4 + P5) << 24 - vand $t2#hi, $t2#hi, $k16 - vext.8 $t0, $t0, $t0, #15 - veor $t3#lo, $t3#lo, $t3#hi @ t3 = (K) (P6 + P7) << 32 - vmov.i64 $t3#hi, #0 - vext.8 $t1, $t1, $t1, #14 - veor $t2#lo, $t2#lo, $t2#hi - vmull.p8 $r, $a, $b @ D = A*B - vext.8 $t3, $t3, $t3, #12 - vext.8 $t2, $t2, $t2, #13 - veor $t0, $t0, $t1 - veor $t2, $t2, $t3 - veor $r, $r, $t0 - veor $r, $r, $t2 -___ -} +my ($Hhi, $Hlo, $Zo, $T, $xi, $mod) = map("d$_",(0..7)); +my ($Qhi, $Qlo, $Z, $R, $zero, $Qpost, $IN) = map("q$_",(8..15)); + +# Z:Zo keeps 128-bit result shifted by 1 to the right, with bottom bit +# in Zo. Or should I say "top bit", because GHASH is specified in +# reverse bit order? Otherwise straightforward 128-bt H by one input +# byte multiplication and modulo-reduction, times 16. + +sub Dlo() { shift=~m|q([1]?[0-9])|?"d".($1*2):""; } +sub Dhi() { shift=~m|q([1]?[0-9])|?"d".($1*2+1):""; } +sub Q() { shift=~m|d([1-3]?[02468])|?"q".($1/2):""; } $code.=<<___; #if __ARM_ARCH__>=7 .fpu neon -.global gcm_init_neon -.type gcm_init_neon,%function -.align 4 -gcm_init_neon: - vld1.64 $IN#hi,[r1,:64]! @ load H - vmov.i8 $t0,#0xe1 - vld1.64 $IN#lo,[r1,:64] - vshl.i64 $t0#hi,#57 - vshr.u64 $t0#lo,#63 @ t0=0xc2....01 - vdup.8 $t1,$IN#hi[7] - vshr.u64 $Hlo,$IN#lo,#63 - vshr.s8 $t1,#7 @ broadcast carry bit - vshl.i64 $IN,$IN,#1 - vand $t0,$t0,$t1 - vorr $IN#hi,$Hlo @ H<<<=1 - veor $IN,$IN,$t0 @ twisted H - vstmia r0,{$IN} - - ret @ bx lr -.size gcm_init_neon,.-gcm_init_neon - .global gcm_gmult_neon .type gcm_gmult_neon,%function .align 4 gcm_gmult_neon: - vld1.64 $IN#hi,[$Xi,:64]! @ load Xi - vld1.64 $IN#lo,[$Xi,:64]! - vmov.i64 $k48,#0x0000ffffffffffff - vldmia $Htbl,{$Hlo-$Hhi} @ load twisted H - vmov.i64 $k32,#0x00000000ffffffff + sub $Htbl,#16 @ point at H in GCM128_CTX + vld1.64 `&Dhi("$IN")`,[$Xi,:64]!@ load Xi + vmov.i32 $mod,#0xe1 @ our irreducible polynomial + vld1.64 `&Dlo("$IN")`,[$Xi,:64]! + vshr.u64 $mod,#32 + vldmia $Htbl,{$Hhi-$Hlo} @ load H + veor $zero,$zero #ifdef __ARMEL__ vrev64.8 $IN,$IN #endif - vmov.i64 $k16,#0x000000000000ffff - veor $Hhl,$Hlo,$Hhi @ Karatsuba pre-processing + veor $Qpost,$Qpost + veor $R,$R + mov $cnt,#16 + veor $Z,$Z mov $len,#16 - b .Lgmult_neon + veor $Zo,$Zo + vdup.8 $xi,`&Dlo("$IN")`[0] @ broadcast lowest byte + b .Linner_neon .size gcm_gmult_neon,.-gcm_gmult_neon .global gcm_ghash_neon .type gcm_ghash_neon,%function .align 4 gcm_ghash_neon: - vld1.64 $Xl#hi,[$Xi,:64]! @ load Xi - vld1.64 $Xl#lo,[$Xi,:64]! - vmov.i64 $k48,#0x0000ffffffffffff - vldmia $Htbl,{$Hlo-$Hhi} @ load twisted H - vmov.i64 $k32,#0x00000000ffffffff + vld1.64 `&Dhi("$Z")`,[$Xi,:64]! @ load Xi + vmov.i32 $mod,#0xe1 @ our irreducible polynomial + vld1.64 `&Dlo("$Z")`,[$Xi,:64]! + vshr.u64 $mod,#32 + vldmia $Xi,{$Hhi-$Hlo} @ load H + veor $zero,$zero + nop #ifdef __ARMEL__ - vrev64.8 $Xl,$Xl + vrev64.8 $Z,$Z #endif - vmov.i64 $k16,#0x000000000000ffff - veor $Hhl,$Hlo,$Hhi @ Karatsuba pre-processing - -.Loop_neon: - vld1.64 $IN#hi,[$inp]! @ load inp - vld1.64 $IN#lo,[$inp]! +.Louter_neon: + vld1.64 `&Dhi($IN)`,[$inp]! @ load inp + veor $Qpost,$Qpost + vld1.64 `&Dlo($IN)`,[$inp]! + veor $R,$R + mov $cnt,#16 #ifdef __ARMEL__ vrev64.8 $IN,$IN #endif - veor $IN,$Xl @ inp^=Xi -.Lgmult_neon: -___ - &clmul64x64 ($Xl,$Hlo,"$IN#lo"); # H.lo·Xi.lo -$code.=<<___; - veor $IN#lo,$IN#lo,$IN#hi @ Karatsuba pre-processing -___ - &clmul64x64 ($Xm,$Hhl,"$IN#lo"); # (H.lo+H.hi)·(Xi.lo+Xi.hi) - &clmul64x64 ($Xh,$Hhi,"$IN#hi"); # H.hi·Xi.hi -$code.=<<___; - veor $Xm,$Xm,$Xl @ Karatsuba post-processing - veor $Xm,$Xm,$Xh - veor $Xl#hi,$Xl#hi,$Xm#lo - veor $Xh#lo,$Xh#lo,$Xm#hi @ Xh|Xl - 256-bit result - - @ equivalent of reduction_avx from ghash-x86_64.pl - vshl.i64 $t1,$Xl,#57 @ 1st phase - vshl.i64 $t2,$Xl,#62 - veor $t2,$t2,$t1 @ - vshl.i64 $t1,$Xl,#63 - veor $t2, $t2, $t1 @ - veor $Xl#hi,$Xl#hi,$t2#lo @ - veor $Xh#lo,$Xh#lo,$t2#hi - - vshr.u64 $t2,$Xl,#1 @ 2nd phase - veor $Xh,$Xh,$Xl - veor $Xl,$Xl,$t2 @ - vshr.u64 $t2,$t2,#6 - vshr.u64 $Xl,$Xl,#1 @ - veor $Xl,$Xl,$Xh @ - veor $Xl,$Xl,$t2 @ - + veor $Zo,$Zo + veor $IN,$Z @ inp^=Xi + veor $Z,$Z + vdup.8 $xi,`&Dlo("$IN")`[0] @ broadcast lowest byte +.Linner_neon: + subs $cnt,$cnt,#1 + vmull.p8 $Qlo,$Hlo,$xi @ H.lo·Xi[i] + vmull.p8 $Qhi,$Hhi,$xi @ H.hi·Xi[i] + vext.8 $IN,$zero,#1 @ IN>>=8 + + veor $Z,$Qpost @ modulo-scheduled part + vshl.i64 `&Dlo("$R")`,#48 + vdup.8 $xi,`&Dlo("$IN")`[0] @ broadcast lowest byte + veor $T,`&Dlo("$Qlo")`,`&Dlo("$Z")` + + veor `&Dhi("$Z")`,`&Dlo("$R")` + vuzp.8 $Qlo,$Qhi + vsli.8 $Zo,$T,#1 @ compose the "carry" byte + vext.8 $Z,$zero,#1 @ Z>>=8 + + vmull.p8 $R,$Zo,$mod @ "carry"·0xe1 + vshr.u8 $Zo,$T,#7 @ save Z's bottom bit + vext.8 $Qpost,$Qlo,$zero,#1 @ Qlo>>=8 + veor $Z,$Qhi + bne .Linner_neon + + veor $Z,$Qpost @ modulo-scheduled artefact + vshl.i64 `&Dlo("$R")`,#48 + veor `&Dhi("$Z")`,`&Dlo("$R")` + + @ finalization, normalize Z:Zo + vand $Zo,$mod @ suffices to mask the bit + vshr.u64 `&Dhi(&Q("$Zo"))`,`&Dlo("$Z")`,#63 + vshl.i64 $Z,#1 subs $len,#16 - bne .Loop_neon + vorr $Z,`&Q("$Zo")` @ Z=Z:Zo<<1 + bne .Louter_neon #ifdef __ARMEL__ - vrev64.8 $Xl,$Xl + vrev64.8 $Z,$Z #endif sub $Xi,#16 - vst1.64 $Xl#hi,[$Xi,:64]! @ write out Xi - vst1.64 $Xl#lo,[$Xi,:64] + vst1.64 `&Dhi("$Z")`,[$Xi,:64]! @ write out Xi + vst1.64 `&Dlo("$Z")`,[$Xi,:64] - ret @ bx lr + bx lr .size gcm_ghash_neon,.-gcm_ghash_neon #endif ___ @@ -480,13 +423,7 @@ $code.=<<___; .align 2 ___ -foreach (split("\n",$code)) { - s/\`([^\`]*)\`/eval $1/geo; - - s/\bq([0-9]+)#(lo|hi)/sprintf "d%d",2*$1+($2 eq "hi")/geo or - s/\bret\b/bx lr/go or - s/\bbx\s+lr\b/.word\t0xe12fff1e/go; # make it possible to compile with -march=armv4 - - print $_,"\n"; -} +$code =~ s/\`([^\`]*)\`/eval $1/gem; +$code =~ s/\bbx\s+lr\b/.word\t0xe12fff1e/gm; # make it possible to compile with -march=armv4 +print $code; close STDOUT; # enforce flush |