File openssl-CVE-2016-0702_2.patch of Package openssl.4634
From: Andy Polyakov <appro@openssl.org>
Date: Tue, 26 Jan 2016 16:25:02 +0100
Subject: crypto/bn/x86_64-mont5.pl: constant-time gather
procedure.
Patch-mainline: OpenSSL_1_0_1s
Git-commit: 7f98aa7403a1244cf17d1aa489f5bb0f39bae431
References: CVE-2016-0702 bsc#968050
[Backport from master]
CVE-2016-0702
Reviewed-by: Richard Levitte <levitte@openssl.org>
---
crypto/bn/asm/x86_64-mont5.pl | 513 ++++++++++++++++++++++++++----------------
1 file changed, 314 insertions(+), 199 deletions(-)
diff --git a/crypto/bn/asm/x86_64-mont5.pl b/crypto/bn/asm/x86_64-mont5.pl
index dae0fe245318..235979181f54 100755
--- a/crypto/bn/asm/x86_64-mont5.pl
+++ b/crypto/bn/asm/x86_64-mont5.pl
@@ -66,60 +66,113 @@ bn_mul_mont_gather5:
.align 16
.Lmul_enter:
mov ${num}d,${num}d
- mov `($win64?56:8)`(%rsp),%r10d # load 7th argument
+ movd `($win64?56:8)`(%rsp),%xmm5 # load 7th argument
+ lea .Linc(%rip),%r10
push %rbx
push %rbp
push %r12
push %r13
push %r14
push %r15
-___
-$code.=<<___ if ($win64);
- lea -0x28(%rsp),%rsp
- movaps %xmm6,(%rsp)
- movaps %xmm7,0x10(%rsp)
+
.Lmul_alloca:
-___
-$code.=<<___;
mov %rsp,%rax
lea 2($num),%r11
neg %r11
- lea (%rsp,%r11,8),%rsp # tp=alloca(8*(num+2))
+ lea -264(%rsp,%r11,8),%rsp # tp=alloca(8*(num+2)+256+8)
and \$-1024,%rsp # minimize TLB usage
mov %rax,8(%rsp,$num,8) # tp[num+1]=%rsp
.Lmul_body:
- mov $bp,%r12 # reassign $bp
+ lea 128($bp),%r12 # reassign $bp (+size optimization)
___
$bp="%r12";
$STRIDE=2**5*8; # 5 is "window size"
$N=$STRIDE/4; # should match cache line size
$code.=<<___;
- mov %r10,%r11
- shr \$`log($N/8)/log(2)`,%r10
- and \$`$N/8-1`,%r11
- not %r10
- lea .Lmagic_masks(%rip),%rax
- and \$`2**5/($N/8)-1`,%r10 # 5 is "window size"
- lea 96($bp,%r11,8),$bp # pointer within 1st cache line
- movq 0(%rax,%r10,8),%xmm4 # set of masks denoting which
- movq 8(%rax,%r10,8),%xmm5 # cache line contains element
- movq 16(%rax,%r10,8),%xmm6 # denoted by 7th argument
- movq 24(%rax,%r10,8),%xmm7
-
- movq `0*$STRIDE/4-96`($bp),%xmm0
- movq `1*$STRIDE/4-96`($bp),%xmm1
- pand %xmm4,%xmm0
- movq `2*$STRIDE/4-96`($bp),%xmm2
- pand %xmm5,%xmm1
- movq `3*$STRIDE/4-96`($bp),%xmm3
- pand %xmm6,%xmm2
- por %xmm1,%xmm0
- pand %xmm7,%xmm3
+ movdqa 0(%r10),%xmm0 # 00000001000000010000000000000000
+ movdqa 16(%r10),%xmm1 # 00000002000000020000000200000002
+ lea 24-112(%rsp,$num,8),%r10# place the mask after tp[num+3] (+ICache optimization)
+ and \$-16,%r10
+
+ pshufd \$0,%xmm5,%xmm5 # broadcast index
+ movdqa %xmm1,%xmm4
+ movdqa %xmm1,%xmm2
+___
+########################################################################
+# calculate mask by comparing 0..31 to index and save result to stack
+#
+$code.=<<___;
+ paddd %xmm0,%xmm1
+ pcmpeqd %xmm5,%xmm0 # compare to 1,0
+ .byte 0x67
+ movdqa %xmm4,%xmm3
+___
+for($k=0;$k<$STRIDE/16-4;$k+=4) {
+$code.=<<___;
+ paddd %xmm1,%xmm2
+ pcmpeqd %xmm5,%xmm1 # compare to 3,2
+ movdqa %xmm0,`16*($k+0)+112`(%r10)
+ movdqa %xmm4,%xmm0
+
+ paddd %xmm2,%xmm3
+ pcmpeqd %xmm5,%xmm2 # compare to 5,4
+ movdqa %xmm1,`16*($k+1)+112`(%r10)
+ movdqa %xmm4,%xmm1
+
+ paddd %xmm3,%xmm0
+ pcmpeqd %xmm5,%xmm3 # compare to 7,6
+ movdqa %xmm2,`16*($k+2)+112`(%r10)
+ movdqa %xmm4,%xmm2
+
+ paddd %xmm0,%xmm1
+ pcmpeqd %xmm5,%xmm0
+ movdqa %xmm3,`16*($k+3)+112`(%r10)
+ movdqa %xmm4,%xmm3
+___
+}
+$code.=<<___; # last iteration can be optimized
+ paddd %xmm1,%xmm2
+ pcmpeqd %xmm5,%xmm1
+ movdqa %xmm0,`16*($k+0)+112`(%r10)
+
+ paddd %xmm2,%xmm3
+ .byte 0x67
+ pcmpeqd %xmm5,%xmm2
+ movdqa %xmm1,`16*($k+1)+112`(%r10)
+
+ pcmpeqd %xmm5,%xmm3
+ movdqa %xmm2,`16*($k+2)+112`(%r10)
+ pand `16*($k+0)-128`($bp),%xmm0 # while it's still in register
+
+ pand `16*($k+1)-128`($bp),%xmm1
+ pand `16*($k+2)-128`($bp),%xmm2
+ movdqa %xmm3,`16*($k+3)+112`(%r10)
+ pand `16*($k+3)-128`($bp),%xmm3
+ por %xmm2,%xmm0
+ por %xmm3,%xmm1
+___
+for($k=0;$k<$STRIDE/16-4;$k+=4) {
+$code.=<<___;
+ movdqa `16*($k+0)-128`($bp),%xmm4
+ movdqa `16*($k+1)-128`($bp),%xmm5
+ movdqa `16*($k+2)-128`($bp),%xmm2
+ pand `16*($k+0)+112`(%r10),%xmm4
+ movdqa `16*($k+3)-128`($bp),%xmm3
+ pand `16*($k+1)+112`(%r10),%xmm5
+ por %xmm4,%xmm0
+ pand `16*($k+2)+112`(%r10),%xmm2
+ por %xmm5,%xmm1
+ pand `16*($k+3)+112`(%r10),%xmm3
por %xmm2,%xmm0
+ por %xmm3,%xmm1
+___
+}
+$code.=<<___;
+ por %xmm1,%xmm0
+ pshufd \$0x4e,%xmm0,%xmm1
+ por %xmm1,%xmm0
lea $STRIDE($bp),$bp
- por %xmm3,%xmm0
-
movq %xmm0,$m0 # m0=bp[0]
mov ($n0),$n0 # pull n0[0] value
@@ -128,29 +181,14 @@ $code.=<<___;
xor $i,$i # i=0
xor $j,$j # j=0
- movq `0*$STRIDE/4-96`($bp),%xmm0
- movq `1*$STRIDE/4-96`($bp),%xmm1
- pand %xmm4,%xmm0
- movq `2*$STRIDE/4-96`($bp),%xmm2
- pand %xmm5,%xmm1
-
mov $n0,$m1
mulq $m0 # ap[0]*bp[0]
mov %rax,$lo0
mov ($np),%rax
- movq `3*$STRIDE/4-96`($bp),%xmm3
- pand %xmm6,%xmm2
- por %xmm1,%xmm0
- pand %xmm7,%xmm3
-
imulq $lo0,$m1 # "tp[0]"*n0
mov %rdx,$hi0
- por %xmm2,%xmm0
- lea $STRIDE($bp),$bp
- por %xmm3,%xmm0
-
mulq $m1 # np[0]*m1
add %rax,$lo0 # discarded
mov 8($ap),%rax
@@ -183,8 +221,6 @@ $code.=<<___;
cmp $num,$j
jne .L1st
- movq %xmm0,$m0 # bp[1]
-
add %rax,$hi1
mov ($ap),%rax # ap[0]
adc \$0,%rdx
@@ -204,33 +240,46 @@ $code.=<<___;
jmp .Louter
.align 16
.Louter:
+ lea 24+128(%rsp,$num,8),%rdx # where 256-byte mask is (+size optimization)
+ and \$-16,%rdx
+ pxor %xmm4,%xmm4
+ pxor %xmm5,%xmm5
+___
+for($k=0;$k<$STRIDE/16;$k+=4) {
+$code.=<<___;
+ movdqa `16*($k+0)-128`($bp),%xmm0
+ movdqa `16*($k+1)-128`($bp),%xmm1
+ movdqa `16*($k+2)-128`($bp),%xmm2
+ movdqa `16*($k+3)-128`($bp),%xmm3
+ pand `16*($k+0)-128`(%rdx),%xmm0
+ pand `16*($k+1)-128`(%rdx),%xmm1
+ por %xmm0,%xmm4
+ pand `16*($k+2)-128`(%rdx),%xmm2
+ por %xmm1,%xmm5
+ pand `16*($k+3)-128`(%rdx),%xmm3
+ por %xmm2,%xmm4
+ por %xmm3,%xmm5
+___
+}
+$code.=<<___;
+ por %xmm5,%xmm4
+ pshufd \$0x4e,%xmm4,%xmm0
+ por %xmm4,%xmm0
+ lea $STRIDE($bp),$bp
+ movq %xmm0,$m0 # m0=bp[i]
+
xor $j,$j # j=0
mov $n0,$m1
mov (%rsp),$lo0
- movq `0*$STRIDE/4-96`($bp),%xmm0
- movq `1*$STRIDE/4-96`($bp),%xmm1
- pand %xmm4,%xmm0
- movq `2*$STRIDE/4-96`($bp),%xmm2
- pand %xmm5,%xmm1
-
mulq $m0 # ap[0]*bp[i]
add %rax,$lo0 # ap[0]*bp[i]+tp[0]
mov ($np),%rax
adc \$0,%rdx
- movq `3*$STRIDE/4-96`($bp),%xmm3
- pand %xmm6,%xmm2
- por %xmm1,%xmm0
- pand %xmm7,%xmm3
-
imulq $lo0,$m1 # tp[0]*n0
mov %rdx,$hi0
- por %xmm2,%xmm0
- lea $STRIDE($bp),$bp
- por %xmm3,%xmm0
-
mulq $m1 # np[0]*m1
add %rax,$lo0 # discarded
mov 8($ap),%rax
@@ -266,8 +315,6 @@ $code.=<<___;
cmp $num,$j
jne .Linner
- movq %xmm0,$m0 # bp[i+1]
-
add %rax,$hi1
mov ($ap),%rax # ap[0]
adc \$0,%rdx
@@ -321,13 +368,7 @@ $code.=<<___;
mov 8(%rsp,$num,8),%rsi # restore %rsp
mov \$1,%rax
-___
-$code.=<<___ if ($win64);
- movaps (%rsi),%xmm6
- movaps 0x10(%rsi),%xmm7
- lea 0x28(%rsi),%rsi
-___
-$code.=<<___;
+
mov (%rsi),%r15
mov 8(%rsi),%r14
mov 16(%rsi),%r13
@@ -348,91 +389,130 @@ $code.=<<___;
bn_mul4x_mont_gather5:
.Lmul4x_enter:
mov ${num}d,${num}d
- mov `($win64?56:8)`(%rsp),%r10d # load 7th argument
+ movd `($win64?56:8)`(%rsp),%xmm5 # load 7th argument
+ lea .Linc(%rip),%r10
push %rbx
push %rbp
push %r12
push %r13
push %r14
push %r15
-___
-$code.=<<___ if ($win64);
- lea -0x28(%rsp),%rsp
- movaps %xmm6,(%rsp)
- movaps %xmm7,0x10(%rsp)
+
.Lmul4x_alloca:
-___
-$code.=<<___;
mov %rsp,%rax
lea 4($num),%r11
neg %r11
- lea (%rsp,%r11,8),%rsp # tp=alloca(8*(num+4))
+ lea -256(%rsp,%r11,8),%rsp # tp=alloca(8*(num+4)+256)
and \$-1024,%rsp # minimize TLB usage
mov %rax,8(%rsp,$num,8) # tp[num+1]=%rsp
.Lmul4x_body:
mov $rp,16(%rsp,$num,8) # tp[num+2]=$rp
- mov %rdx,%r12 # reassign $bp
+ lea 128(%rdx),%r12 # reassign $bp (+size optimization)
___
$bp="%r12";
$STRIDE=2**5*8; # 5 is "window size"
$N=$STRIDE/4; # should match cache line size
$code.=<<___;
- mov %r10,%r11
- shr \$`log($N/8)/log(2)`,%r10
- and \$`$N/8-1`,%r11
- not %r10
- lea .Lmagic_masks(%rip),%rax
- and \$`2**5/($N/8)-1`,%r10 # 5 is "window size"
- lea 96($bp,%r11,8),$bp # pointer within 1st cache line
- movq 0(%rax,%r10,8),%xmm4 # set of masks denoting which
- movq 8(%rax,%r10,8),%xmm5 # cache line contains element
- movq 16(%rax,%r10,8),%xmm6 # denoted by 7th argument
- movq 24(%rax,%r10,8),%xmm7
-
- movq `0*$STRIDE/4-96`($bp),%xmm0
- movq `1*$STRIDE/4-96`($bp),%xmm1
- pand %xmm4,%xmm0
- movq `2*$STRIDE/4-96`($bp),%xmm2
- pand %xmm5,%xmm1
- movq `3*$STRIDE/4-96`($bp),%xmm3
- pand %xmm6,%xmm2
- por %xmm1,%xmm0
- pand %xmm7,%xmm3
+ movdqa 0(%r10),%xmm0 # 00000001000000010000000000000000
+ movdqa 16(%r10),%xmm1 # 00000002000000020000000200000002
+ lea 32-112(%rsp,$num,8),%r10# place the mask after tp[num+4] (+ICache optimization)
+
+ pshufd \$0,%xmm5,%xmm5 # broadcast index
+ movdqa %xmm1,%xmm4
+ .byte 0x67,0x67
+ movdqa %xmm1,%xmm2
+___
+########################################################################
+# calculate mask by comparing 0..31 to index and save result to stack
+#
+$code.=<<___;
+ paddd %xmm0,%xmm1
+ pcmpeqd %xmm5,%xmm0 # compare to 1,0
+ .byte 0x67
+ movdqa %xmm4,%xmm3
+___
+for($k=0;$k<$STRIDE/16-4;$k+=4) {
+$code.=<<___;
+ paddd %xmm1,%xmm2
+ pcmpeqd %xmm5,%xmm1 # compare to 3,2
+ movdqa %xmm0,`16*($k+0)+112`(%r10)
+ movdqa %xmm4,%xmm0
+
+ paddd %xmm2,%xmm3
+ pcmpeqd %xmm5,%xmm2 # compare to 5,4
+ movdqa %xmm1,`16*($k+1)+112`(%r10)
+ movdqa %xmm4,%xmm1
+
+ paddd %xmm3,%xmm0
+ pcmpeqd %xmm5,%xmm3 # compare to 7,6
+ movdqa %xmm2,`16*($k+2)+112`(%r10)
+ movdqa %xmm4,%xmm2
+
+ paddd %xmm0,%xmm1
+ pcmpeqd %xmm5,%xmm0
+ movdqa %xmm3,`16*($k+3)+112`(%r10)
+ movdqa %xmm4,%xmm3
+___
+}
+$code.=<<___; # last iteration can be optimized
+ paddd %xmm1,%xmm2
+ pcmpeqd %xmm5,%xmm1
+ movdqa %xmm0,`16*($k+0)+112`(%r10)
+
+ paddd %xmm2,%xmm3
+ .byte 0x67
+ pcmpeqd %xmm5,%xmm2
+ movdqa %xmm1,`16*($k+1)+112`(%r10)
+
+ pcmpeqd %xmm5,%xmm3
+ movdqa %xmm2,`16*($k+2)+112`(%r10)
+ pand `16*($k+0)-128`($bp),%xmm0 # while it's still in register
+
+ pand `16*($k+1)-128`($bp),%xmm1
+ pand `16*($k+2)-128`($bp),%xmm2
+ movdqa %xmm3,`16*($k+3)+112`(%r10)
+ pand `16*($k+3)-128`($bp),%xmm3
+ por %xmm2,%xmm0
+ por %xmm3,%xmm1
+___
+for($k=0;$k<$STRIDE/16-4;$k+=4) {
+$code.=<<___;
+ movdqa `16*($k+0)-128`($bp),%xmm4
+ movdqa `16*($k+1)-128`($bp),%xmm5
+ movdqa `16*($k+2)-128`($bp),%xmm2
+ pand `16*($k+0)+112`(%r10),%xmm4
+ movdqa `16*($k+3)-128`($bp),%xmm3
+ pand `16*($k+1)+112`(%r10),%xmm5
+ por %xmm4,%xmm0
+ pand `16*($k+2)+112`(%r10),%xmm2
+ por %xmm5,%xmm1
+ pand `16*($k+3)+112`(%r10),%xmm3
por %xmm2,%xmm0
+ por %xmm3,%xmm1
+___
+}
+$code.=<<___;
+ por %xmm1,%xmm0
+ pshufd \$0x4e,%xmm0,%xmm1
+ por %xmm1,%xmm0
lea $STRIDE($bp),$bp
- por %xmm3,%xmm0
-
movq %xmm0,$m0 # m0=bp[0]
+
mov ($n0),$n0 # pull n0[0] value
mov ($ap),%rax
xor $i,$i # i=0
xor $j,$j # j=0
- movq `0*$STRIDE/4-96`($bp),%xmm0
- movq `1*$STRIDE/4-96`($bp),%xmm1
- pand %xmm4,%xmm0
- movq `2*$STRIDE/4-96`($bp),%xmm2
- pand %xmm5,%xmm1
-
mov $n0,$m1
mulq $m0 # ap[0]*bp[0]
mov %rax,$A[0]
mov ($np),%rax
- movq `3*$STRIDE/4-96`($bp),%xmm3
- pand %xmm6,%xmm2
- por %xmm1,%xmm0
- pand %xmm7,%xmm3
-
imulq $A[0],$m1 # "tp[0]"*n0
mov %rdx,$A[1]
- por %xmm2,%xmm0
- lea $STRIDE($bp),$bp
- por %xmm3,%xmm0
-
mulq $m1 # np[0]*m1
add %rax,$A[0] # discarded
mov 8($ap),%rax
@@ -550,8 +630,6 @@ $code.=<<___;
mov $N[1],-16(%rsp,$j,8) # tp[j-1]
mov %rdx,$N[0]
- movq %xmm0,$m0 # bp[1]
-
xor $N[1],$N[1]
add $A[0],$N[0]
adc \$0,$N[1]
@@ -561,12 +639,34 @@ $code.=<<___;
lea 1($i),$i # i++
.align 4
.Louter4x:
+ lea 32+128(%rsp,$num,8),%rdx # where 256-byte mask is (+size optimization)
+ pxor %xmm4,%xmm4
+ pxor %xmm5,%xmm5
+___
+for($k=0;$k<$STRIDE/16;$k+=4) {
+$code.=<<___;
+ movdqa `16*($k+0)-128`($bp),%xmm0
+ movdqa `16*($k+1)-128`($bp),%xmm1
+ movdqa `16*($k+2)-128`($bp),%xmm2
+ movdqa `16*($k+3)-128`($bp),%xmm3
+ pand `16*($k+0)-128`(%rdx),%xmm0
+ pand `16*($k+1)-128`(%rdx),%xmm1
+ por %xmm0,%xmm4
+ pand `16*($k+2)-128`(%rdx),%xmm2
+ por %xmm1,%xmm5
+ pand `16*($k+3)-128`(%rdx),%xmm3
+ por %xmm2,%xmm4
+ por %xmm3,%xmm5
+___
+}
+$code.=<<___;
+ por %xmm5,%xmm4
+ pshufd \$0x4e,%xmm4,%xmm0
+ por %xmm4,%xmm0
+ lea $STRIDE($bp),$bp
+ movq %xmm0,$m0 # m0=bp[i]
+
xor $j,$j # j=0
- movq `0*$STRIDE/4-96`($bp),%xmm0
- movq `1*$STRIDE/4-96`($bp),%xmm1
- pand %xmm4,%xmm0
- movq `2*$STRIDE/4-96`($bp),%xmm2
- pand %xmm5,%xmm1
mov (%rsp),$A[0]
mov $n0,$m1
@@ -575,18 +675,9 @@ $code.=<<___;
mov ($np),%rax
adc \$0,%rdx
- movq `3*$STRIDE/4-96`($bp),%xmm3
- pand %xmm6,%xmm2
- por %xmm1,%xmm0
- pand %xmm7,%xmm3
-
imulq $A[0],$m1 # tp[0]*n0
mov %rdx,$A[1]
- por %xmm2,%xmm0
- lea $STRIDE($bp),$bp
- por %xmm3,%xmm0
-
mulq $m1 # np[0]*m1
add %rax,$A[0] # "$N[0]", discarded
mov 8($ap),%rax
@@ -718,7 +809,6 @@ $code.=<<___;
mov $N[0],-24(%rsp,$j,8) # tp[j-1]
mov %rdx,$N[0]
- movq %xmm0,$m0 # bp[i+1]
mov $N[1],-16(%rsp,$j,8) # tp[j-1]
xor $N[1],$N[1]
@@ -809,13 +899,7 @@ ___
$code.=<<___;
mov 8(%rsp,$num,8),%rsi # restore %rsp
mov \$1,%rax
-___
-$code.=<<___ if ($win64);
- movaps (%rsi),%xmm6
- movaps 0x10(%rsi),%xmm7
- lea 0x28(%rsi),%rsi
-___
-$code.=<<___;
+
mov (%rsi),%r15
mov 8(%rsi),%r14
mov 16(%rsi),%r13
@@ -830,8 +914,8 @@ ___
}}}
{
-my ($inp,$num,$tbl,$idx)=$win64?("%rcx","%rdx","%r8", "%r9") : # Win64 order
- ("%rdi","%rsi","%rdx","%rcx"); # Unix order
+my ($inp,$num,$tbl,$idx)=$win64?("%rcx","%rdx","%r8", "%r9d") : # Win64 order
+ ("%rdi","%rsi","%rdx","%ecx"); # Unix order
my $out=$inp;
my $STRIDE=2**5*8;
my $N=$STRIDE/4;
@@ -859,53 +943,89 @@ bn_scatter5:
.type bn_gather5,\@abi-omnipotent
.align 16
bn_gather5:
-___
-$code.=<<___ if ($win64);
-.LSEH_begin_bn_gather5:
+.LSEH_begin_bn_gather5: # Win64 thing, but harmless in other cases
# I can't trust assembler to use specific encoding:-(
- .byte 0x48,0x83,0xec,0x28 #sub \$0x28,%rsp
- .byte 0x0f,0x29,0x34,0x24 #movaps %xmm6,(%rsp)
- .byte 0x0f,0x29,0x7c,0x24,0x10 #movdqa %xmm7,0x10(%rsp)
+ .byte 0x4c,0x8d,0x14,0x24 # lea (%rsp),%r10
+ .byte 0x48,0x81,0xec,0x08,0x01,0x00,0x00 # sub $0x108,%rsp
+ lea .Linc(%rip),%rax
+ and \$-16,%rsp # shouldn't be formally required
+
+ movd $idx,%xmm5
+ movdqa 0(%rax),%xmm0 # 00000001000000010000000000000000
+ movdqa 16(%rax),%xmm1 # 00000002000000020000000200000002
+ lea 128($tbl),%r11 # size optimization
+ lea 128(%rsp),%rax # size optimization
+
+ pshufd \$0,%xmm5,%xmm5 # broadcast $idx
+ movdqa %xmm1,%xmm4
+ movdqa %xmm1,%xmm2
___
+########################################################################
+# calculate mask by comparing 0..31 to $idx and save result to stack
+#
+for($i=0;$i<$STRIDE/16;$i+=4) {
+$code.=<<___;
+ paddd %xmm0,%xmm1
+ pcmpeqd %xmm5,%xmm0 # compare to 1,0
+___
+$code.=<<___ if ($i);
+ movdqa %xmm3,`16*($i-1)-128`(%rax)
+___
+$code.=<<___;
+ movdqa %xmm4,%xmm3
+
+ paddd %xmm1,%xmm2
+ pcmpeqd %xmm5,%xmm1 # compare to 3,2
+ movdqa %xmm0,`16*($i+0)-128`(%rax)
+ movdqa %xmm4,%xmm0
+
+ paddd %xmm2,%xmm3
+ pcmpeqd %xmm5,%xmm2 # compare to 5,4
+ movdqa %xmm1,`16*($i+1)-128`(%rax)
+ movdqa %xmm4,%xmm1
+
+ paddd %xmm3,%xmm0
+ pcmpeqd %xmm5,%xmm3 # compare to 7,6
+ movdqa %xmm2,`16*($i+2)-128`(%rax)
+ movdqa %xmm4,%xmm2
+___
+}
$code.=<<___;
- mov $idx,%r11
- shr \$`log($N/8)/log(2)`,$idx
- and \$`$N/8-1`,%r11
- not $idx
- lea .Lmagic_masks(%rip),%rax
- and \$`2**5/($N/8)-1`,$idx # 5 is "window size"
- lea 96($tbl,%r11,8),$tbl # pointer within 1st cache line
- movq 0(%rax,$idx,8),%xmm4 # set of masks denoting which
- movq 8(%rax,$idx,8),%xmm5 # cache line contains element
- movq 16(%rax,$idx,8),%xmm6 # denoted by 7th argument
- movq 24(%rax,$idx,8),%xmm7
+ movdqa %xmm3,`16*($i-1)-128`(%rax)
jmp .Lgather
-.align 16
-.Lgather:
- movq `0*$STRIDE/4-96`($tbl),%xmm0
- movq `1*$STRIDE/4-96`($tbl),%xmm1
- pand %xmm4,%xmm0
- movq `2*$STRIDE/4-96`($tbl),%xmm2
- pand %xmm5,%xmm1
- movq `3*$STRIDE/4-96`($tbl),%xmm3
- pand %xmm6,%xmm2
- por %xmm1,%xmm0
- pand %xmm7,%xmm3
- por %xmm2,%xmm0
- lea $STRIDE($tbl),$tbl
- por %xmm3,%xmm0
+.align 32
+.Lgather:
+ pxor %xmm4,%xmm4
+ pxor %xmm5,%xmm5
+___
+for($i=0;$i<$STRIDE/16;$i+=4) {
+$code.=<<___;
+ movdqa `16*($i+0)-128`(%r11),%xmm0
+ movdqa `16*($i+1)-128`(%r11),%xmm1
+ movdqa `16*($i+2)-128`(%r11),%xmm2
+ pand `16*($i+0)-128`(%rax),%xmm0
+ movdqa `16*($i+3)-128`(%r11),%xmm3
+ pand `16*($i+1)-128`(%rax),%xmm1
+ por %xmm0,%xmm4
+ pand `16*($i+2)-128`(%rax),%xmm2
+ por %xmm1,%xmm5
+ pand `16*($i+3)-128`(%rax),%xmm3
+ por %xmm2,%xmm4
+ por %xmm3,%xmm5
+___
+}
+$code.=<<___;
+ por %xmm5,%xmm4
+ lea $STRIDE(%r11),%r11
+ pshufd \$0x4e,%xmm4,%xmm0
+ por %xmm4,%xmm0
movq %xmm0,($out) # m0=bp[0]
lea 8($out),$out
sub \$1,$num
jnz .Lgather
-___
-$code.=<<___ if ($win64);
- movaps (%rsp),%xmm6
- movaps 0x10(%rsp),%xmm7
- lea 0x28(%rsp),%rsp
-___
-$code.=<<___;
+
+ lea (%r10),%rsp
ret
.LSEH_end_bn_gather5:
.size bn_gather5,.-bn_gather5
@@ -913,9 +1033,9 @@ ___
}
$code.=<<___;
.align 64
-.Lmagic_masks:
- .long 0,0, 0,0, 0,0, -1,-1
- .long 0,0, 0,0, 0,0, 0,0
+.Linc:
+ .long 0,0, 1,1
+ .long 2,2, 2,2
.asciz "Montgomery Multiplication with scatter/gather for x86_64, CRYPTOGAMS by <appro\@openssl.org>"
___
@@ -954,7 +1074,7 @@ mul_handler:
cmp %r10,%rbx # context->Rip<end of prologue label
jb .Lcommon_seh_tail
- lea `40+48`(%rax),%rax
+ lea 48(%rax),%rax
mov 4(%r11),%r10d # HandlerData[1]
lea (%rsi,%r10),%r10 # end of alloca label
@@ -971,9 +1091,7 @@ mul_handler:
mov 192($context),%r10 # pull $num
mov 8(%rax,%r10,8),%rax # pull saved stack pointer
- movaps (%rax),%xmm0
- movaps 16(%rax),%xmm1
- lea `40+48`(%rax),%rax
+ lea 48(%rax),%rax
mov -8(%rax),%rbx
mov -16(%rax),%rbp
@@ -987,8 +1105,6 @@ mul_handler:
mov %r13,224($context) # restore context->R13
mov %r14,232($context) # restore context->R14
mov %r15,240($context) # restore context->R15
- movups %xmm0,512($context) # restore context->Xmm6
- movups %xmm1,528($context) # restore context->Xmm7
.Lcommon_seh_tail:
mov 8(%rax),%rdi
@@ -1057,10 +1173,9 @@ mul_handler:
.rva .Lmul4x_alloca,.Lmul4x_body,.Lmul4x_epilogue # HandlerData[]
.align 8
.LSEH_info_bn_gather5:
- .byte 0x01,0x0d,0x05,0x00
- .byte 0x0d,0x78,0x01,0x00 #movaps 0x10(rsp),xmm7
- .byte 0x08,0x68,0x00,0x00 #movaps (rsp),xmm6
- .byte 0x04,0x42,0x00,0x00 #sub rsp,0x28
+ .byte 0x01,0x0b,0x03,0x0a
+ .byte 0x0b,0x01,0x21,0x00 # sub rsp,0x108
+ .byte 0x04,0xa3,0x00,0x00 # lea r10,(rsp), set_frame r10
.align 8
___
}
--
2.7.2
