sha1-x86_64.pl: add missing rex prefix in shaext.
PR: 3405
(Imported from upstream's 1f6d2076256761b44e7336b496ab0887f90cea69)
diff --git a/crypto/sha/asm/sha1-x86_64.pl b/crypto/sha/asm/sha1-x86_64.pl
index 01010cf..272dcfa 100644
--- a/crypto/sha/asm/sha1-x86_64.pl
+++ b/crypto/sha/asm/sha1-x86_64.pl
@@ -2030,8 +2030,12 @@
"sha1msg1" => 0xc9,
"sha1msg2" => 0xca );
- if (defined($opcodelet{$instr}) && @_[0] =~ /%xmm([0-7]),\s*%xmm([0-7])/) {
+ if (defined($opcodelet{$instr}) && @_[0] =~ /%xmm([0-9]+),\s*%xmm([0-9]+)/) {
my @opcode=(0x0f,0x38);
+ my $rex=0;
+ $rex|=0x04 if ($2>=8);
+ $rex|=0x01 if ($1>=8);
+ unshift @opcode,0x40|$rex if ($rex);
push @opcode,$opcodelet{$instr};
push @opcode,0xc0|($1&7)|(($2&7)<<3); # ModR/M
return ".byte\t".join(',',@opcode);
