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bn/asm/sparcv9-mont.pl: fix squaring code path.

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This module is used only with odd input lengths, i.e. not used in normal
PKI cases, on contemporary processors. The problem was "illuminated" by
fuzzing tests.

Reviewed-by: Richard Levitte <levitte@openssl.org>
(cherry picked from commit 120a9e1a825bd0407639bedb1e8e15823cf7a545)
This commit is contained in:
Andy Polyakov 2017-03-22 10:51:25 +01:00
parent a9614a81c6
commit 6fd7aa95f0
1 changed files with 16 additions and 13 deletions
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29
crypto/bn/asm/sparcv9-mont.pl
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@ -300,7 +300,7 @@ ___
######## .Lbn_sqr_mont gives up to 20% *overall* improvement over
######## code without following dedicated squaring procedure.
########
$sbit="%i2"; # re-use $bp!
$sbit="%o5";
$code.=<<___;
.align 32
@ -413,7 +413,7 @@ $code.=<<___;
mulx $apj,$mul0,$acc0
mulx $npj,$mul1,$acc1
add $acc0,$car0,$car0
add $tpj,$car1,$car1
add $tpj,$sbit,$sbit
ld [$ap+$j],$apj ! ap[j]
and $car0,$mask,$acc0
ld [$np+$j],$npj ! np[j]
@ -422,7 +422,7 @@ $code.=<<___;
ld [$tp+8],$tpj ! tp[j]
add $acc0,$acc0,$acc0
add $j,4,$j ! j++
or $sbit,$acc0,$acc0
add $sbit,$acc0,$acc0
srlx $acc0,32,$sbit
and $acc0,$mask,$acc0
cmp $j,$num
@ -436,12 +436,12 @@ $code.=<<___;
mulx $apj,$mul0,$acc0
mulx $npj,$mul1,$acc1
add $acc0,$car0,$car0
add $tpj,$car1,$car1
add $tpj,$sbit,$sbit
and $car0,$mask,$acc0
srlx $car0,32,$car0
add $acc1,$car1,$car1
add $acc0,$acc0,$acc0
or $sbit,$acc0,$acc0
add $sbit,$acc0,$acc0
srlx $acc0,32,$sbit
and $acc0,$mask,$acc0
add $acc0,$car1,$car1
@ -449,7 +449,7 @@ $code.=<<___;
srlx $car1,32,$car1
add $car0,$car0,$car0
or $sbit,$car0,$car0
add $sbit,$car0,$car0
add $car0,$car1,$car1
add $car2,$car1,$car1
st $car1,[$tp+4]
@ -509,7 +509,7 @@ $code.=<<___;
.Lsqr_inner2:
mulx $apj,$mul0,$acc0
mulx $npj,$mul1,$acc1
add $tpj,$car1,$car1
add $tpj,$sbit,$sbit
add $acc0,$car0,$car0
ld [$ap+$j],$apj ! ap[j]
and $car0,$mask,$acc0
@ -517,7 +517,7 @@ $code.=<<___;
srlx $car0,32,$car0
add $acc0,$acc0,$acc0
ld [$tp+8],$tpj ! tp[j]
or $sbit,$acc0,$acc0
add $sbit,$acc0,$acc0
add $j,4,$j ! j++
srlx $acc0,32,$sbit
and $acc0,$mask,$acc0
@ -532,12 +532,12 @@ $code.=<<___;
.Lsqr_no_inner2:
mulx $apj,$mul0,$acc0
mulx $npj,$mul1,$acc1
add $tpj,$car1,$car1
add $tpj,$sbit,$sbit
add $acc0,$car0,$car0
and $car0,$mask,$acc0
srlx $car0,32,$car0
add $acc0,$acc0,$acc0
or $sbit,$acc0,$acc0
add $sbit,$acc0,$acc0
srlx $acc0,32,$sbit
and $acc0,$mask,$acc0
add $acc0,$car1,$car1
@ -546,7 +546,7 @@ $code.=<<___;
srlx $car1,32,$car1
add $car0,$car0,$car0
or $sbit,$car0,$car0
add $sbit,$car0,$car0
add $car0,$car1,$car1
add $car2,$car1,$car1
st $car1,[$tp+4]
@ -591,14 +591,17 @@ $code.=<<___;
!.Lsqr_last
mulx $npj,$mul1,$acc1
add $tpj,$car1,$car1
add $tpj,$acc0,$acc0
srlx $acc0,32,$tmp0
and $acc0,$mask,$acc0
add $tmp0,$sbit,$sbit
add $acc0,$car1,$car1
add $acc1,$car1,$car1
st $car1,[$tp]
srlx $car1,32,$car1
add $car0,$car0,$car0 ! recover $car0
or $sbit,$car0,$car0
add $sbit,$car0,$car0
add $car0,$car1,$car1
add $car2,$car1,$car1
st $car1,[$tp+4]