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insns.pl: add "nohi" code for REX_NH

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Add a "nohi" code flag for the \325 byte code, which sets the REX_NH
flag.  That is, REX_P not required to support high registers, high
registers are not supported and spl/bpl/sil/dil enabled even in
non-64-bit mode.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
H. Peter Anvin 2009-06-25 23:16:17 -07:00
parent f5051691c9
commit 51c7de27e8
1 changed files with 2 additions and 0 deletions
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insns.pl
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@ -666,6 +666,8 @@ sub byte_code_compile($$) {
push(@codes, 0334);
} elsif ($op eq 'repe') {
push(@codes, 0335);
} elsif ($op eq 'nohi') { # Use spl/bpl/sil/dil even without REX
push(@codes, 0325);
} elsif ($prefix_ok && $op =~ /^(66|f2|f3|np)$/) {
# 66/F2/F3 prefix used as an opcode extension, or np = no prefix
if ($op eq '66') {