mirror/nasm
2
0
Fork 0
mirror of https://github.com/netwide-assembler/nasm.git synced 2025-02-17 17:19:35 +08:00
Code Issues Packages Projects Releases Wiki Activity

insns.pl: match AMD documentation for DREX syntax

Browse Source 
Adjust the compiler to give a syntax for DREX instructions that
matches the AMD documentation.
This commit is contained in:
H. Peter Anvin 2008-05-21 14:44:42 -07:00
parent eccd1acca9
commit f89b305c32
1 changed files with 9 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
insns.pl
View File

@ -660,21 +660,18 @@ sub byte_code_compile($) {
push(@codes, defined($oppos{'v'}) ? 0260+$oppos{'v'} : 0270,
$m, ($w << 3)+($l << 2)+$p);
$prefix_ok = 0;
} elsif ($op =~ /^drex(|..*)$/) {
my ($oc0) = (0);
foreach $oq (split(/\./, $op)) {
if ($oq eq 'drex') {
#prefix
} elsif ($oq eq 'oc0') {
$oc0 = 1;
} else {
die "$0: $line: undefined DREX subcode: $oq\n";
}
}
} elsif ($op =~ /^\/drex([01])$/) {
my $oc0 = $1;
if (!defined($oppos{'d'})) {
die "$0: $line: DREX without a 'd' operand\n";
}
push(@codes, 0160+$oppos{'d'}+($oc0 ? 4 : 0));
# Note the use of *unshift* here, as opposed to *push*.
# This is because NASM want this byte code at the start of
# the instruction sequence, but the AMD documentation puts
# this at (roughly) the position of the drex byte itself.
# This allows us to match the AMD documentation and still
# do the right thing.
unshift(@codes, 0160+$oppos{'d'}+($oc0 ? 4 : 0));
} elsif ($op =~ /^(ib\,s|ib|ib\,w|iw|iwd|id|iwdq|rel|rel8|rel16|rel32|iq|seg|ibw|ibd|ibd,s)$/) {
if (!defined($oppos{'i'})) {
die "$0: $op without 'i' operand\n";