Commit 8e9f1bb9 authored by Andy Polyakov's avatar Andy Polyakov
Browse files

chacha/asm/chacha-x86.pl: make it compile on legacy systems. 



Usage of $ymm variable is a bit misleading here, it doesn't refer
to %ymm register bank, but rather to VEX instruction encoding,
which AMD XOP code path depends on.

Reviewed-by: default avatarRichard Levitte <levitte@openssl.org>
parent 24c2cd39

crypto/chacha/asm/chacha-x86.pl

+3 −1
Original line number Diff line number Diff line
@@ -437,8 +437,10 @@ my ($ap,$bp,$cp,$dp)=map(($_&~3)+(($_-1)&3),($ai,$bi,$ci,$di)); # previous 


&function_begin("ChaCha20_ssse3");

&set_label("ssse3_shortcut");

if ($ymm) {

	&test		(&DWP(4,"ebp"),1<<11);		# test XOP bit

	&jnz		(&label("xop_shortcut"));

}



	&mov		($out,&wparam(0));

	&mov		($inp,&wparam(1));
@@ -770,7 +772,7 @@ sub SSSE3ROUND { # critical path is 20 "SIMD ticks" per round 
}

&asciz	("ChaCha20 for x86, CRYPTOGAMS by <appro\@openssl.org>");



if ($xmm) {

if ($ymm) {

my ($xa,$xa_,$xb,$xb_,$xc,$xc_,$xd,$xd_)=map("xmm$_",(0..7));

my ($out,$inp,$len)=("edi","esi","ecx");