diff options
author | Andy Polyakov <appro@openssl.org> | 2013-07-05 21:10:56 +0200 |
---|---|---|
committer | Andy Polyakov <appro@openssl.org> | 2013-07-05 21:15:16 +0200 |
commit | e3990db59c83dac6360918e894ccb69efff0a056 (patch) | |
tree | c4df97e01451197a3771eacd1f73eef5cd655e24 /crypto/bn | |
parent | 87d90528acea8380e9ebfc86fd2df9063341a2dd (diff) |
bn/asm/x86_86-mont.pl: optimize reduction for Intel Core family.
(cherry picked from commit 26e43b48a3fa72fc5d7f3aa849af3d7917deea9d)
Diffstat (limited to 'crypto/bn')
-rwxr-xr-x | crypto/bn/asm/x86_64-mont.pl | 761 |
1 files changed, 449 insertions, 312 deletions
diff --git a/crypto/bn/asm/x86_64-mont.pl b/crypto/bn/asm/x86_64-mont.pl index 17fb94c84c..78221bae33 100755 --- a/crypto/bn/asm/x86_64-mont.pl +++ b/crypto/bn/asm/x86_64-mont.pl @@ -29,6 +29,12 @@ # to *initial* version of this module from 2005 is ~0%/30%/40%/45% # for 512-/1024-/2048-/4096-bit RSA *sign* benchmarks respectively. +# June 2013. +# +# Optmize reduction in squaring procedure and improve 1024+-bit RSA +# sign performance by 10-16% on Intel Sandy Bridge and later +# (virtually same on non-Intel processors). + $flavour = shift; $output = shift; if ($flavour =~ /\./) { $output = $flavour; undef $flavour; } @@ -71,7 +77,9 @@ bn_mul_mont: jb .Lmul_enter cmp $ap,$bp jne .Lmul4x_enter - jmp .Lsqr4x_enter + test \$7,${num}d + jz .Lsqr8x_enter + jmp .Lmul4x_enter .align 16 .Lmul_enter: @@ -688,14 +696,13 @@ ___ }}} {{{ ###################################################################### -# void bn_sqr4x_mont( +# void bn_sqr8x_mont( my $rptr="%rdi"; # const BN_ULONG *rptr, my $aptr="%rsi"; # const BN_ULONG *aptr, my $bptr="%rdx"; # not used my $nptr="%rcx"; # const BN_ULONG *nptr, my $n0 ="%r8"; # const BN_ULONG *n0); -my $num ="%r9"; # int num, has to be divisible by 4 and - # not less than 8 +my $num ="%r9"; # int num, has to be divisible by 8 my ($i,$j,$tptr)=("%rbp","%rcx",$rptr); my @A0=("%r10","%r11"); @@ -703,10 +710,10 @@ my @A1=("%r12","%r13"); my ($a0,$a1,$ai)=("%r14","%r15","%rbx"); $code.=<<___; -.type bn_sqr4x_mont,\@function,6 -.align 16 -bn_sqr4x_mont: -.Lsqr4x_enter: +.type bn_sqr8x_mont,\@function,6 +.align 32 +bn_sqr8x_mont: +.Lsqr8x_enter: push %rbx push %rbp push %r12 @@ -736,7 +743,7 @@ bn_sqr4x_mont: mov $nptr,40(%rsp) mov $n0, 48(%rsp) mov %r11, 56(%rsp) # save original %rsp -.Lsqr4x_body: +.Lsqr8x_body: ############################################################## # Squaring part: # @@ -744,6 +751,72 @@ bn_sqr4x_mont: # b) shift result of a) by 1 to the left and accumulate # a[i]*a[i] products; # + ############################################################## + # a[1]a[0] + # a[2]a[0] + # a[3]a[0] + # a[2]a[1] + # a[4]a[0] + # a[3]a[1] + # a[5]a[0] + # a[4]a[1] + # a[3]a[2] + # a[6]a[0] + # a[5]a[1] + # a[4]a[2] + # a[7]a[0] + # a[6]a[1] + # a[5]a[2] + # a[4]a[3] + # a[7]a[1] + # a[6]a[2] + # a[5]a[3] + # a[7]a[2] + # a[6]a[3] + # a[5]a[4] + # a[7]a[3] + # a[6]a[4] + # a[7]a[4] + # a[6]a[5] + # a[7]a[5] + # a[7]a[6] + # a[1]a[0] + # a[2]a[0] + # a[3]a[0] + # a[4]a[0] + # a[5]a[0] + # a[6]a[0] + # a[7]a[0] + # a[2]a[1] + # a[3]a[1] + # a[4]a[1] + # a[5]a[1] + # a[6]a[1] + # a[7]a[1] + # a[3]a[2] + # a[4]a[2] + # a[5]a[2] + # a[6]a[2] + # a[7]a[2] + # a[4]a[3] + # a[5]a[3] + # a[6]a[3] + # a[7]a[3] + # a[5]a[4] + # a[6]a[4] + # a[7]a[4] + # a[6]a[5] + # a[7]a[5] + # a[7]a[6] + # a[0]a[0] + # a[1]a[1] + # a[2]a[2] + # a[3]a[3] + # a[4]a[4] + # a[5]a[5] + # a[6]a[6] + # a[7]a[7] + lea 32(%r10),$i # $i=-($num-32) lea ($aptr,$num),$aptr # end of a[] buffer, ($aptr,$i)=&ap[2] @@ -763,12 +836,12 @@ bn_sqr4x_mont: mov %rdx,$A0[1] mov $A0[0],-24($tptr,$i) # t[1] - xor $A0[0],$A0[0] mul $a0 # a[2]*a[0] add %rax,$A0[1] mov $ai,%rax - adc %rdx,$A0[0] + adc \$0,%rdx mov $A0[1],-16($tptr,$i) # t[2] + mov %rdx,$A0[0] lea -16($i),$j # j=-16 @@ -779,102 +852,102 @@ bn_sqr4x_mont: mov $ai,%rax mov %rdx,$A1[1] - xor $A0[1],$A0[1] - add $A1[0],$A0[0] lea 16($j),$j - adc \$0,$A0[1] mul $a0 # a[3]*a[0] add %rax,$A0[0] # a[3]*a[0]+a[2]*a[1]+t[3] mov $ai,%rax - adc %rdx,$A0[1] + mov %rdx,$A0[1] + adc \$0,$A0[1] + add $A1[0],$A0[0] + adc \$0,$A0[1] mov $A0[0],-8($tptr,$j) # t[3] jmp .Lsqr4x_1st -.align 16 +.align 32 .Lsqr4x_1st: mov ($aptr,$j),$ai # a[4] - xor $A1[0],$A1[0] mul $a1 # a[3]*a[1] add %rax,$A1[1] # a[3]*a[1]+t[4] mov $ai,%rax - adc %rdx,$A1[0] + mov %rdx,$A1[0] + adc \$0,$A1[0] - xor $A0[0],$A0[0] - add $A1[1],$A0[1] - adc \$0,$A0[0] mul $a0 # a[4]*a[0] add %rax,$A0[1] # a[4]*a[0]+a[3]*a[1]+t[4] mov $ai,%rax # a[3] - adc %rdx,$A0[0] - mov $A0[1],($tptr,$j) # t[4] + mov 8($aptr,$j),$ai # a[5] + mov %rdx,$A0[0] + adc \$0,$A0[0] + add $A1[1],$A0[1] + adc \$0,$A0[0] - mov 8($aptr,$j),$ai # a[5] - xor $A1[1],$A1[1] mul $a1 # a[4]*a[3] add %rax,$A1[0] # a[4]*a[3]+t[5] mov $ai,%rax - adc %rdx,$A1[1] + mov $A0[1],($tptr,$j) # t[4] + mov %rdx,$A1[1] + adc \$0,$A1[1] - xor $A0[1],$A0[1] - add $A1[0],$A0[0] - adc \$0,$A0[1] mul $a0 # a[5]*a[2] add %rax,$A0[0] # a[5]*a[2]+a[4]*a[3]+t[5] mov $ai,%rax - adc %rdx,$A0[1] - mov $A0[0],8($tptr,$j) # t[5] - mov 16($aptr,$j),$ai # a[6] - xor $A1[0],$A1[0] + mov %rdx,$A0[1] + adc \$0,$A0[1] + add $A1[0],$A0[0] + adc \$0,$A0[1] + mul $a1 # a[5]*a[3] add %rax,$A1[1] # a[5]*a[3]+t[6] mov $ai,%rax - adc %rdx,$A1[0] + mov $A0[0],8($tptr,$j) # t[5] + mov %rdx,$A1[0] + adc \$0,$A1[0] - xor $A0[0],$A0[0] - add $A1[1],$A0[1] - adc \$0,$A0[0] mul $a0 # a[6]*a[2] add %rax,$A0[1] # a[6]*a[2]+a[5]*a[3]+t[6] mov $ai,%rax # a[3] - adc %rdx,$A0[0] - mov $A0[1],16($tptr,$j) # t[6] + mov 24($aptr,$j),$ai # a[7] + mov %rdx,$A0[0] + adc \$0,$A0[0] + add $A1[1],$A0[1] + adc \$0,$A0[0] - mov 24($aptr,$j),$ai # a[7] - xor $A1[1],$A1[1] mul $a1 # a[6]*a[5] add %rax,$A1[0] # a[6]*a[5]+t[7] mov $ai,%rax - adc %rdx,$A1[1] + mov $A0[1],16($tptr,$j) # t[6] + mov %rdx,$A1[1] + adc \$0,$A1[1] - xor $A0[1],$A0[1] - add $A1[0],$A0[0] - lea 32($j),$j - adc \$0,$A0[1] mul $a0 # a[7]*a[4] add %rax,$A0[0] # a[7]*a[4]+a[6]*a[5]+t[6] mov $ai,%rax - adc %rdx,$A0[1] + lea 32($j),$j + mov %rdx,$A0[1] + adc \$0,$A0[1] + add $A1[0],$A0[0] + adc \$0,$A0[1] mov $A0[0],-8($tptr,$j) # t[7] cmp \$0,$j jne .Lsqr4x_1st - xor $A1[0],$A1[0] - add $A0[1],$A1[1] - adc \$0,$A1[0] mul $a1 # a[7]*a[5] add %rax,$A1[1] - adc %rdx,$A1[0] + lea 16($i),$i + adc \$0,%rdx + add $A0[1],$A1[1] + adc \$0,%rdx mov $A1[1],($tptr) # t[8] - lea 16($i),$i - mov $A1[0],8($tptr) # t[9] + mov %rdx,$A1[0] + mov %rdx,8($tptr) # t[9] jmp .Lsqr4x_outer -.align 16 +.align 32 .Lsqr4x_outer: # comments apply to $num==6 case mov -32($aptr,$i),$a0 # a[0] lea 64(%rsp,$num,2),$tptr # end of tp[] buffer, &tp[2*$num] @@ -884,20 +957,20 @@ bn_sqr4x_mont: mov %rax,$a1 mov -24($tptr,$i),$A0[0] # t[1] - xor $A0[1],$A0[1] mul $a0 # a[1]*a[0] add %rax,$A0[0] # a[1]*a[0]+t[1] mov $ai,%rax # a[2] - adc %rdx,$A0[1] + adc \$0,%rdx mov $A0[0],-24($tptr,$i) # t[1] + mov %rdx,$A0[1] - xor $A0[0],$A0[0] - add -16($tptr,$i),$A0[1] # a[2]*a[0]+t[2] - adc \$0,$A0[0] mul $a0 # a[2]*a[0] add %rax,$A0[1] mov $ai,%rax - adc %rdx,$A0[0] + adc \$0,%rdx + add -16($tptr,$i),$A0[1] # a[2]*a[0]+t[2] + mov %rdx,$A0[0] + adc \$0,$A0[0] mov $A0[1],-16($tptr,$i) # t[2] lea -16($i),$j # j=-16 @@ -905,77 +978,77 @@ bn_sqr4x_mont: mov 8($aptr,$j),$ai # a[3] - xor $A1[1],$A1[1] - add 8($tptr,$j),$A1[0] - adc \$0,$A1[1] mul $a1 # a[2]*a[1] add %rax,$A1[0] # a[2]*a[1]+t[3] mov $ai,%rax - adc %rdx,$A1[1] + adc \$0,%rdx + add 8($tptr,$j),$A1[0] + mov %rdx,$A1[1] + adc \$0,$A1[1] - xor $A0[1],$A0[1] - add $A1[0],$A0[0] - adc \$0,$A0[1] mul $a0 # a[3]*a[0] add %rax,$A0[0] # a[3]*a[0]+a[2]*a[1]+t[3] mov $ai,%rax - adc %rdx,$A0[1] + adc \$0,%rdx + add $A1[0],$A0[0] + mov %rdx,$A0[1] + adc \$0,$A0[1] mov $A0[0],8($tptr,$j) # t[3] lea 16($j),$j jmp .Lsqr4x_inner -.align 16 +.align 32 .Lsqr4x_inner: mov ($aptr,$j),$ai # a[4] - xor $A1[0],$A1[0] - add ($tptr,$j),$A1[1] - adc \$0,$A1[0] mul $a1 # a[3]*a[1] add %rax,$A1[1] # a[3]*a[1]+t[4] mov $ai,%rax - adc %rdx,$A1[0] + mov %rdx,$A1[0] + adc \$0,$A1[0] + add ($tptr,$j),$A1[1] + adc \$0,$A1[0] - xor $A0[0],$A0[0] - add $A1[1],$A0[1] - adc \$0,$A0[0] mul $a0 # a[4]*a[0] add %rax,$A0[1] # a[4]*a[0]+a[3]*a[1]+t[4] mov $ai,%rax # a[3] - adc %rdx,$A0[0] - mov $A0[1],($tptr,$j) # t[4] - mov 8($aptr,$j),$ai # a[5] - xor $A1[1],$A1[1] - add 8($tptr,$j),$A1[0] - adc \$0,$A1[1] + mov %rdx,$A0[0] + adc \$0,$A0[0] + add $A1[1],$A0[1] + adc \$0,$A0[0] + mul $a1 # a[4]*a[3] add %rax,$A1[0] # a[4]*a[3]+t[5] + mov $A0[1],($tptr,$j) # t[4] mov $ai,%rax - adc %rdx,$A1[1] - - xor $A0[1],$A0[1] - add $A1[0],$A0[0] + mov %rdx,$A1[1] + adc \$0,$A1[1] + add 8($tptr,$j),$A1[0] lea 16($j),$j # j++ - adc \$0,$A0[1] + adc \$0,$A1[1] + mul $a0 # a[5]*a[2] add %rax,$A0[0] # a[5]*a[2]+a[4]*a[3]+t[5] mov $ai,%rax - adc %rdx,$A0[1] + adc \$0,%rdx + add $A1[0],$A0[0] + mov %rdx,$A0[1] + adc \$0,$A0[1] mov $A0[0],-8($tptr,$j) # t[5], "preloaded t[1]" below cmp \$0,$j jne .Lsqr4x_inner - xor $A1[0],$A1[0] - add $A0[1],$A1[1] - adc \$0,$A1[0] mul $a1 # a[5]*a[3] add %rax,$A1[1] - adc %rdx,$A1[0] + adc \$0,%rdx + add $A0[1],$A1[1] + adc \$0,%rdx mov $A1[1],($tptr) # t[6], "preloaded t[2]" below - mov $A1[0],8($tptr) # t[7], "preloaded t[3]" below + mov %rdx,$A1[0] + mov %rdx,8($tptr) # t[7], "preloaded t[3]" below add \$16,$i jnz .Lsqr4x_outer @@ -988,48 +1061,48 @@ bn_sqr4x_mont: mov -16($aptr),$ai # a[2] mov %rax,$a1 - xor $A0[1],$A0[1] mul $a0 # a[1]*a[0] add %rax,$A0[0] # a[1]*a[0]+t[1], preloaded t[1] mov $ai,%rax # a[2] - adc %rdx,$A0[1] - mov $A0[0],-24($tptr) # t[1] + mov %rdx,$A0[1] + adc \$0,$A0[1] - xor $A0[0],$A0[0] - add $A1[1],$A0[1] # a[2]*a[0]+t[2], preloaded t[2] - adc \$0,$A0[0] mul $a0 # a[2]*a[0] add %rax,$A0[1] mov $ai,%rax - adc %rdx,$A0[0] - mov $A0[1],-16($tptr) # t[2] - + mov $A0[0],-24($tptr) # t[1] + mov %rdx,$A0[0] + adc \$0,$A0[0] + add $A1[1],$A0[1] # a[2]*a[0]+t[2], preloaded t[2] mov -8($aptr),$ai # a[3] + adc \$0,$A0[0] + mul $a1 # a[2]*a[1] add %rax,$A1[0] # a[2]*a[1]+t[3], preloaded t[3] mov $ai,%rax - adc \$0,%rdx + mov $A0[1],-16($tptr) # t[2] + mov %rdx,$A1[1] + adc \$0,$A1[1] - xor $A0[1],$A0[1] - add $A1[0],$A0[0] - mov %rdx,$A1[1] - adc \$0,$A0[1] mul $a0 # a[3]*a[0] add %rax,$A0[0] # a[3]*a[0]+a[2]*a[1]+t[3] mov $ai,%rax - adc %rdx,$A0[1] + mov %rdx,$A0[1] + adc \$0,$A0[1] + add $A1[0],$A0[0] + adc \$0,$A0[1] mov $A0[0],-8($tptr) # t[3] - xor $A1[0],$A1[0] - add $A0[1],$A1[1] - adc \$0,$A1[0] mul $a1 # a[3]*a[1] add %rax,$A1[1] mov -16($aptr),%rax # a[2] - adc %rdx,$A1[0] + adc \$0,%rdx + add $A0[1],$A1[1] + adc \$0,%rdx mov $A1[1],($tptr) # t[4] - mov $A1[0],8($tptr) # t[5] + mov %rdx,$A1[0] + mov %rdx,8($tptr) # t[5] mul $ai # a[2]*a[3] ___ @@ -1089,7 +1162,7 @@ $code.=<<___; sbb $carry,$carry # mov cf,$carry jmp .Lsqr4x_shift_n_add -.align 16 +.align 32 .Lsqr4x_shift_n_add: lea ($shift,$A0[0],2),$S[0] # t[2*i]<<1 | shift shr \$63,$A0[0] @@ -1191,211 +1264,275 @@ $code.=<<___; mov $S[3],-8($tptr) ___ } -############################################################## +###################################################################### # Montgomery reduction part, "word-by-word" algorithm. # +# This new path is inspired by multiple submissions from Intel, by +# Shay Gueron, Vlad Krasnov, Erdinc Ozturk, James Guilford, +# Vinodh Gopal... { -my ($topbit,$nptr)=("%rbp",$aptr); -my ($m0,$m1)=($a0,$a1); -my @Ni=("%rbx","%r9"); +my ($nptr,$tptr,$carry,$m0)=("%rbp","%rdi","%rsi","%rbx"); + $code.=<<___; - mov 40(%rsp),$nptr # restore $nptr - mov 48(%rsp),$n0 # restore *n0 - xor $j,$j - mov $num,0(%rsp) # save $num - sub $num,$j # $j=-$num - mov 64(%rsp),$A0[0] # t[0] # modsched # - mov $n0,$m0 # # modsched # - lea 64(%rsp,$num,2),%rax # end of t[] buffer - lea 64(%rsp,$num),$tptr # end of t[] window - mov %rax,8(%rsp) # save end of t[] buffer - lea ($nptr,$num),$nptr # end of n[] buffer - xor $topbit,$topbit # $topbit=0 - - mov 0($nptr,$j),%rax # n[0] # modsched # - mov 8($nptr,$j),$Ni[1] # n[1] # modsched # - imulq $A0[0],$m0 # m0=t[0]*n0 # modsched # - mov %rax,$Ni[0] # # modsched # - jmp .Lsqr4x_mont_outer + mov 40(%rsp),$nptr # pull $nptr + xor %rax,%rax + lea ($nptr,$num),%rdx # end of n[] + lea 64(%rsp,$num,2),$tptr # end of t[] buffer + mov %rdx,0(%rsp) + mov $tptr,8(%rsp) + mov %rax,($tptr) # clear top-most carry bit + lea 64(%rsp,$num),$tptr # end of initial t[] window + neg $num + jmp .L8x_reduction_loop + +.align 32 +.L8x_reduction_loop: + lea ($tptr,$num),$tptr # start of current t[] window + mov 8*0($tptr),$m0 + mov 8*1($tptr),%r9 + mov 8*2($tptr),%r10 + mov 8*3($tptr),%r11 + mov 8*4($tptr),%r12 + mov 8*5($tptr),%r13 + mov 8*6($tptr),%r14 + mov 8*7($tptr),%r15 + lea 8*8($tptr),$tptr + + mov $m0,%r8 + imulq 48(%rsp),$m0 # n0*a[0] + mov 8*0($nptr),%rax # n[0] + mov \$8,%ecx + jmp .L8x_reduce + +.align 32 +.L8x_reduce: + mulq $m0 + mov 8*1($nptr),%rax # n[1] + neg %r8 + mov %rdx,%r8 + adc \$0,%r8 -.align 16 -.Lsqr4x_mont_outer: - xor $A0[1],$A0[1] - mul $m0 # n[0]*m0 - add %rax,$A0[0] # n[0]*m0+t[0] - mov $Ni[1],%rax - adc %rdx,$A0[1] - mov $n0,$m1 + mulq $m0 + add %rax,%r9 + mov 8*2($nptr),%rax + adc \$0,%rdx + add %r9,%r8 + mov $m0,64-8(%rsp,%rcx,8) # put aside n0*a[i] + mov %rdx,%r9 + adc \$0,%r9 - xor $A0[0],$A0[0] - add 8($tptr,$j),$A0[1] - adc \$0,$A0[0] - mul $m0 # n[1]*m0 - add %rax,$A0[1] # n[1]*m0+t[1] - mov $Ni[0],%rax - adc %rdx,$A0[0] + mulq $m0 + add %rax,%r10 + mov 8*3($nptr),%rax + adc \$0,%rdx + add %r10,%r9 + mov 48(%rsp),$carry # pull n0, borrow $carry + mov %rdx,%r10 + adc \$0,%r10 - imulq $A0[1],$m1 + mulq $m0 + add %rax,%r11 + mov 8*4($nptr),%rax + adc \$0,%rdx + imulq %r8,$carry # modulo-scheduled + add %r11,%r10 + mov %rdx,%r11 + adc \$0,%r11 - mov 16($nptr,$j),$Ni[0] # n[2] - xor $A1[1],$A1[1] - add $A0[1],$A1[0] - adc \$0,$A1[1] - mul $m1 # n[0]*m1 - add %rax,$A1[0] # n[0]*m1+"t[1]" - mov $Ni[0],%rax - adc %rdx,$A1[1] - mov $A1[0],8($tptr,$j) # "t[1]" - - xor $A0[1],$A0[1] - add 16($tptr,$j),$A0[0] - adc \$0,$A0[1] - mul $m0 # n[2]*m0 - add %rax,$A0[0] # n[2]*m0+t[2] - mov $Ni[1],%rax - adc %rdx,$A0[1] + mulq $m0 + add %rax,%r12 + mov 8*5($nptr),%rax + adc \$0,%rdx + add %r12,%r11 + mov %rdx,%r12 + adc \$0,%r12 - mov 24($nptr,$j),$Ni[1] # n[3] - xor $A1[0],$A1[0] - add $A0[0],$A1[1] - adc \$0,$A1[0] - mul $m1 # n[1]*m1 - add %rax,$A1[1] # n[1]*m1+"t[2]" - mov $Ni[1],%rax - adc %rdx,$A1[0] - mov $A1[1],16($tptr,$j) # "t[2]" - - xor $A0[0],$A0[0] - add 24($tptr,$j),$A0[1] - lea 32($j),$j - adc \$0,$A0[0] - mul $m0 # n[3]*m0 - add %rax,$A0[1] # n[3]*m0+t[3] - mov $Ni[0],%rax - adc %rdx,$A0[0] - jmp .Lsqr4x_mont_inner + mulq $m0 + add %rax,%r13 + mov 8*6($nptr),%rax + adc \$0,%rdx + add %r13,%r12 + mov %rdx,%r13 + adc \$0,%r13 -.align 16 -.Lsqr4x_mont_inner: - mov ($nptr,$j),$Ni[0] # n[4] - xor $A1[1],$A1[1] - add $A0[1],$A1[0] - adc \$0,$A1[1] - mul $m1 # n[2]*m1 - add %rax,$A1[0] # n[2]*m1+"t[3]" - mov $Ni[0],%rax - adc %rdx,$A1[1] - mov $A1[0],-8($tptr,$j) # "t[3]" - - xor $A0[1],$A0[1] - add ($tptr,$j),$A0[0] - adc \$0,$A0[1] - mul $m0 # n[4]*m0 - add %rax,$A0[0] # n[4]*m0+t[4] - mov $Ni[1],%rax - adc %rdx,$A0[1] + mulq $m0 + add %rax,%r14 + mov 8*7($nptr),%rax + adc \$0,%rdx + add %r14,%r13 + mov %rdx,%r14 + adc \$0,%r14 - mov 8($nptr,$j),$Ni[1] # n[5] - xor $A1[0],$A1[0] - add $A0[0],$A1[1] - adc \$0,$A1[0] - mul $m1 # n[3]*m1 - add %rax,$A1[1] # n[3]*m1+"t[4]" - mov $Ni[1],%rax - adc %rdx,$A1[0] - mov $A1[1],($tptr,$j) # "t[4]" - - xor $A0[0],$A0[0] - add 8($tptr,$j),$A0[1] - adc \$0,$A0[0] - mul $m0 # n[5]*m0 - add %rax,$A0[1] # n[5]*m0+t[5] - mov $Ni[0],%rax - adc %rdx,$A0[0] + mulq $m0 + mov $carry,$m0 # n0*a[i] + add %rax,%r15 + mov 8*0($nptr),%rax # n[0] + adc \$0,%rdx + add %r15,%r14 + mov %rdx,%r15 + adc \$0,%r15 + + dec %ecx + jnz .L8x_reduce + + lea 8*8($nptr),$nptr + xor %rax,%rax + mov 8(%rsp),%rdx # pull end of t[] + xor $carry,$carry + cmp 0(%rsp),$nptr # end of n[]? + jae .L8x_no_tail + + add 8*0($tptr),%r8 + adc 8*1($tptr),%r9 + adc 8*2($tptr),%r10 + adc 8*3($tptr),%r11 + adc 8*4($tptr),%r12 + adc 8*5($tptr),%r13 + adc 8*6($tptr),%r14 + adc 8*7($tptr),%r15 + sbb $carry,$carry # top carry + + mov 64+56(%rsp),$m0 # pull n0*a[0] + mov \$8,%ecx + mov 8*0($nptr),%rax + jmp .L8x_tail + +.align 32 +.L8x_tail: + mulq $m0 + add %rax,%r8 + mov 8*1($nptr),%rax + mov %r8,($tptr) # save result + mov %rdx,%r8 + adc \$0,%r8 + mulq $m0 + add %rax,%r9 + mov 8*2($nptr),%rax + adc \$0,%rdx + add %r9,%r8 + lea 8($tptr),$tptr # $tptr++ + mov %rdx,%r9 + adc \$0,%r9 - mov 16($nptr,$j),$Ni[0] # n[6] - xor $A1[1],$A1[1] - add $A0[1],$A1[0] - adc \$0,$A1[1] - mul $m1 # n[4]*m1 - add %rax,$A1[0] # n[4]*m1+"t[5]" - mov $Ni[0],%rax - adc %rdx,$A1[1] - mov $A1[0],8($tptr,$j) # "t[5]" - - xor $A0[1],$A0[1] - add 16($tptr,$j),$A0[0] - adc \$0,$A0[1] - mul $m0 # n[6]*m0 - add %rax,$A0[0] # n[6]*m0+t[6] - mov $Ni[1],%rax - adc %rdx,$A0[1] + mulq $m0 + add %rax,%r10 + mov 8*3($nptr),%rax + adc \$0,%rdx + add %r10,%r9 + mov %rdx,%r10 + adc \$0,%r10 - mov 24($nptr,$j),$Ni[1] # n[7] - xor $A1[0],$A1[0] - add $A0[0],$A1[1] - adc \$0,$A1[0] - mul $m1 # n[5]*m1 - add %rax,$A1[1] # n[5]*m1+"t[6]" - mov $Ni[1],%rax - adc %rdx,$A1[0] - mov $A1[1],16($tptr,$j) # "t[6]" - - xor $A0[0],$A0[0] - add 24($tptr,$j),$A0[1] - lea 32($j),$j - adc \$0,$A0[0] - mul $m0 # n[7]*m0 - add %rax,$A0[1] # n[7]*m0+t[7] - mov $Ni[0],%rax - adc %rdx,$A0[0] - cmp \$0,$j - jne .Lsqr4x_mont_inner + mulq $m0 + add %rax,%r11 + mov 8*4($nptr),%rax + adc \$0,%rdx + add %r11,%r10 + mov %rdx,%r11 + adc \$0,%r11 - sub 0(%rsp),$j # $j=-$num # modsched # - mov $n0,$m0 # # modsched # + mulq $m0 + add %rax,%r12 + mov 8*5($nptr),%rax + adc \$0,%rdx + add %r12,%r11 + mov %rdx,%r12 + adc \$0,%r12 - xor $A1[1],$A1[1] - add $A0[1],$A1[0] - adc \$0,$A1[1] - mul $m1 # n[6]*m1 - add %rax,$A1[0] # n[6]*m1+"t[7]" - mov $Ni[1],%rax - adc %rdx,$A1[1] - mov $A1[0],-8($tptr) # "t[7]" - - xor $A0[1],$A0[1] - add ($tptr),$A0[0] # +t[8] - adc \$0,$A0[1] - mov 0($nptr,$j),$Ni[0] # n[0] # modsched # - add $topbit,$A0[0] - adc \$0,$A0[1] + mulq $m0 + add %rax,%r13 + mov 8*6($nptr),%rax + adc \$0,%rdx + add %r13,%r12 + mov %rdx,%r13 + adc \$0,%r13 - imulq 16($tptr,$j),$m0 # m0=t[0]*n0 # modsched # - xor $A1[0],$A1[0] - mov 8($nptr,$j),$Ni[1] # n[1] # modsched # - add $A0[0],$A1[1] - mov 16($tptr,$j),$A0[0] # t[0] # modsched # - adc \$0,$A1[0] - mul $m1 # n[7]*m1 - add %rax,$A1[1] # n[7]*m1+"t[8]" - mov $Ni[0],%rax # # modsched # - adc %rdx,$A1[0] - mov $A1[1],($tptr) # "t[8]" - - xor $topbit,$topbit - add 8($tptr),$A1[0] # +t[9] - adc $topbit,$topbit - add $A0[1],$A1[0] - lea 16($tptr),$tptr # "t[$num]>>128" - adc \$0,$topbit - mov $A1[0],-8($tptr) # "t[9]" - cmp 8(%rsp),$tptr # are we done? - jb .Lsqr4x_mont_outer - - mov 0(%rsp),$num # restore $num - mov $topbit,($tptr) # save $topbit + mulq $m0 + add %rax,%r14 + mov 8*7($nptr),%rax + adc \$0,%rdx + add %r14,%r13 + mov %rdx,%r14 + adc \$0,%r14 + + mulq $m0 + mov 64-16(%rsp,%rcx,8),$m0 # pull n0*a[i] + add %rax,%r15 + adc \$0,%rdx + add %r15,%r14 + mov 8*0($nptr),%rax # pull n[0] + mov %rdx,%r15 + adc \$0,%r15 + + dec %ecx + jnz .L8x_tail + + lea 8*8($nptr),$nptr + mov 8(%rsp),%rdx # pull end of t[] + cmp 0(%rsp),$nptr # end of n[]? + jae .L8x_tail_done # break out of loop + + mov 64+56(%rsp),$m0 # pull n0*a[0] + neg $carry + mov 8*0($nptr),%rax # pull n[0] + adc 8*0($tptr),%r8 + adc 8*1($tptr),%r9 + adc 8*2($tptr),%r10 + adc 8*3($tptr),%r11 + adc 8*4($tptr),%r12 + adc 8*5($tptr),%r13 + adc 8*6($tptr),%r14 + adc 8*7($tptr),%r15 + sbb $carry,$carry # top carry + + mov \$8,%ecx + jmp .L8x_tail + +.align 32 +.L8x_tail_done: + add (%rdx),%r8 # can this overflow? + adc \$0,%r9 + adc \$0,%r10 + adc \$0,%r11 + adc \$0,%r12 + adc \$0,%r13 + adc \$0,%r14 + adc \$0,%r15 + sbb %rax,%rax + +.L8x_no_tail: + neg $carry + adc 8*0($tptr),%r8 + adc 8*1($tptr),%r9 + adc 8*2($tptr),%r10 + adc 8*3($tptr),%r11 + adc 8*4($tptr),%r12 + adc 8*5($tptr),%r13 + adc 8*6($tptr),%r14 + adc 8*7($tptr),%r15 + sbb $carry,$carry + neg %rax + sub $carry,%rax # top-most carry + + mov 40(%rsp),$nptr # restore $nptr + + mov %r8,8*0($tptr) # store top 512 bits + mov %r9,8*1($tptr) + mov $nptr,$num # $num is %r9, can't be moved upwards + mov %r10,8*2($tptr) + sub 0(%rsp),$num # -$num + mov %r11,8*3($tptr) + mov %r12,8*4($tptr) + mov %r13,8*5($tptr) + mov %r14,8*6($tptr) + mov %r15,8*7($tptr) + lea 8*8($tptr),$tptr + mov %rax,(%rdx) # store top-most carry + + cmp %rdx,$tptr # end of t[]? + jb .L8x_reduction_loop + + neg $num # restore $num ___ } ############################################################## @@ -1419,7 +1556,7 @@ $code.=<<___; sbb 8($nptr),@ri[1] lea -1($num),$j # j=num/4-1 jmp .Lsqr4x_sub -.align 16 +.align 32 .Lsqr4x_sub: mov @ri[0],0($rptr,$i,8) # rp[i]=tp[i]-np[i] mov @ri[1],8($rptr,$i,8) # rp[i]=tp[i]-np[i] @@ -1462,7 +1599,7 @@ $code.=<<___; movdqa %xmm0,($nptr) # zap upper half of temporary vector movdqu %xmm1,($rptr) jmp .Lsqr4x_copy -.align 16 +.align 32 .Lsqr4x_copy: # copy or in-place refresh movdqu 16($tptr,$i),%xmm2 movdqu 32($tptr,$i),%xmm1 @@ -1492,9 +1629,9 @@ $code.=<<___; mov 32(%rsi),%rbp mov 40(%rsi),%rbx lea 48(%rsi),%rsp -.Lsqr4x_epilogue: +.Lsqr8x_epilogue: ret -.size bn_sqr4x_mont,.-bn_sqr4x_mont +.size bn_sqr8x_mont,.-bn_sqr8x_mont ___ }}} $code.=<<___; @@ -1581,13 +1718,13 @@ sqr_handler: mov 120($context),%rax # pull context->Rax mov 248($context),%rbx # pull context->Rip - lea .Lsqr4x_body(%rip),%r10 + lea .Lsqr8x_body(%rip),%r10 cmp %r10,%rbx # context->Rip<.Lsqr_body jb .Lcommon_seh_tail mov 152($context),%rax # pull context->Rsp - lea .Lsqr4x_epilogue(%rip),%r10 + lea .Lsqr8x_epilogue(%rip),%r10 cmp %r10,%rbx # context->Rip>=.Lsqr_epilogue jae .Lcommon_seh_tail @@ -1657,9 +1794,9 @@ sqr_handler: .rva .LSEH_end_bn_mul4x_mont .rva .LSEH_info_bn_mul4x_mont - .rva .LSEH_begin_bn_sqr4x_mont - .rva .LSEH_end_bn_sqr4x_mont - .rva .LSEH_info_bn_sqr4x_mont + .rva .LSEH_begin_bn_sqr8x_mont + .rva .LSEH_end_bn_sqr8x_mont + .rva .LSEH_info_bn_sqr8x_mont .section .xdata .align 8 @@ -1671,7 +1808,7 @@ sqr_handler: .byte 9,0,0,0 .rva mul_handler .rva .Lmul4x_body,.Lmul4x_epilogue # HandlerData[] -.LSEH_info_bn_sqr4x_mont: +.LSEH_info_bn_sqr8x_mont: .byte 9,0,0,0 .rva sqr_handler ___ |