The branch OpenSSL_1_0_2-stable has been updated
via 64333004a41a9f4aa587b8e5401420fb70d00687 (commit)
from 04f2a0b50d219aafcef2fa718d91462b587aa23d (commit)
- Log -----------------------------------------------------------------
commit 64333004a41a9f4aa587b8e5401420fb70d00687
Author: Andy Polyakov <ap...@openssl.org>
Date: Wed Feb 3 11:26:11 2016 +0100
ec/asm/ecp_nistz256-x86_64.pl: get corner case logic right.
RT#4284
Reviewed-by: Rich Salz <rs...@openssl.org>
(cherry picked from commit d93753412b455907b4dc09427ccd2382209d9af2)
-----------------------------------------------------------------------
Summary of changes:
crypto/ec/asm/ecp_nistz256-x86_64.pl | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/crypto/ec/asm/ecp_nistz256-x86_64.pl
b/crypto/ec/asm/ecp_nistz256-x86_64.pl
index e6acfd5..7140860 100755
--- a/crypto/ec/asm/ecp_nistz256-x86_64.pl
+++ b/crypto/ec/asm/ecp_nistz256-x86_64.pl
@@ -2001,6 +2001,7 @@ $code.=<<___;
push %r15
sub \$32*5+8, %rsp
+.Lpoint_double_shortcut$x:
movdqu 0x00($a_ptr), %xmm0 # copy *(P256_POINT *)$a_ptr.x
mov $a_ptr, $b_ptr # backup copy
movdqu 0x10($a_ptr), %xmm1
@@ -2291,6 +2292,7 @@ $code.=<<___;
mov 0x40+8*1($b_ptr), $acc6
mov 0x40+8*2($b_ptr), $acc7
mov 0x40+8*3($b_ptr), $acc0
+ movq $b_ptr, %xmm1
lea 0x40-$bias($b_ptr), $a_ptr
lea $Z1sqr(%rsp), $r_ptr # Z1^2
@@ -2346,7 +2348,7 @@ $code.=<<___;
test $acc0, $acc0
jnz .Ladd_proceed$x # (in1infty || in2infty)?
test $acc1, $acc1
- jz .Ladd_proceed$x # is_equal(S1,S2)?
+ jz .Ladd_double$x # is_equal(S1,S2)?
movq %xmm0, $r_ptr # restore $r_ptr
pxor %xmm0, %xmm0
@@ -2359,6 +2361,13 @@ $code.=<<___;
jmp .Ladd_done$x
.align 32
+.Ladd_double$x:
+ movq %xmm1, $a_ptr # restore $a_ptr
+ movq %xmm0, $r_ptr # restore $r_ptr
+ add \$`32*(18-5)`, %rsp # difference in frame sizes
+ jmp .Lpoint_double_shortcut$x
+
+.align 32
.Ladd_proceed$x:
`&load_for_sqr("$R(%rsp)", "$src0")`
lea $Rsqr(%rsp), $r_ptr # R^2
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