Commit f5d840a0 authored by Andy Polyakov's avatar Andy Polyakov
Browse files

bn/asm/vis3-mont.pl: fix intermittent EC failures on SPARC T3. 



BLKINIT optimization worked on T4, but for some reason appears "too
aggressive" for T3 triggering intermiitent EC failures. It's not clear
why only EC is affected...

Reviewed-by: default avatarTim Hudson <tjh@openssl.org>
(cherry picked from commit 579734ce)
parent 886ef2b6

crypto/bn/asm/vis3-mont.pl

+5 −5
Original line number Diff line number Diff line
@@ -100,7 +100,7 @@ $code.=<<___; 
	ld	[$ap+12],	$t3

	or	$t0,	$aj,	$aj

	add	$ap,	16,	$ap

	stxa	$aj,	[$anp]0xe2	! converted ap[0]

	stx	$aj,	[$anp]		! converted ap[0]



	mulx	$aj,	$m0,	$lo0	! ap[0]*bp[0]

	umulxhi	$aj,	$m0,	$hi0
@@ -150,7 +150,7 @@ $code.=<<___; 
	sllx	$t1,	32,	$aj

	add	$ap,	8,	$ap

	or	$t0,	$aj,	$aj

	stxa	$aj,	[$anp]0xe2	! converted ap[j]

	stx	$aj,	[$anp]		! converted ap[j]



	ld	[$np+0],	$t2	! np[j]

	addcc	$nlo,	$hi1,	$lo1
@@ -169,7 +169,7 @@ $code.=<<___; 
	addcc	$lo0,	$lo1,	$lo1	! np[j]*m1+ap[j]*bp[0]

	umulxhi	$nj,	$m1,	$nj	! nhi=nj

	addxc	%g0,	$hi1,	$hi1

	stxa	$lo1,	[$tp]0xe2	! tp[j-1]

	stx	$lo1,	[$tp]		! tp[j-1]

	add	$tp,	8,	$tp	! tp++



	brnz,pt	$cnt,	.L1st
@@ -182,12 +182,12 @@ $code.=<<___; 
	addxc	$nj,	%g0,	$hi1

	addcc	$lo0,	$lo1,	$lo1	! np[j]*m1+ap[j]*bp[0]

	addxc	%g0,	$hi1,	$hi1

	stxa	$lo1,	[$tp]0xe2	! tp[j-1]

	stx	$lo1,	[$tp]		! tp[j-1]

	add	$tp,	8,	$tp



	addcc	$hi0,	$hi1,	$hi1

	addxc	%g0,	%g0,	$ovf	! upmost overflow bit

	stxa	$hi1,	[$tp]0xe2

	stx	$hi1,	[$tp]

	add	$tp,	8,	$tp



	ba	.Louter