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x86: re-order logic in OP_XMM()

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Instead of excluding an increasing number of modes in the initial if(),
check the special modes first.
This commit is contained in:
Jan Beulich 2021-03-11 16:21:48 +01:00
parent ac7a231133
commit fd1fd06186
2 changed files with 35 additions and 35 deletions
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4
opcodes/ChangeLog
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@ -1,3 +1,7 @@
2021-03-11 Jan Beulich <jbeulich@suse.com>
* i386-dis.c (OP_XMM): Re-order checks.
2021-03-11 Jan Beulich <jbeulich@suse.com>
* i386-dis.c (putop): Drop need_vex check when also checking

66
opcodes/i386-dis.c
View File

@ -12598,13 +12598,37 @@ OP_XMM (int bytemode, int sizeflag ATTRIBUTE_UNUSED)
reg += 16;
}
if (need_vex
&& bytemode != xmm_mode
&& bytemode != xmmq_mode
&& bytemode != evex_half_bcst_xmmq_mode
&& bytemode != ymm_mode
&& bytemode != tmm_mode
&& bytemode != scalar_mode)
if (bytemode == xmmq_mode
|| bytemode == evex_half_bcst_xmmq_mode)
{
switch (vex.length)
{
case 128:
case 256:
names = names_xmm;
break;
case 512:
names = names_ymm;
break;
default:
abort ();
}
}
else if (bytemode == ymm_mode)
names = names_ymm;
else if (bytemode == tmm_mode)
{
modrm.reg = reg;
if (reg >= 8)
{
oappend ("(bad)");
return;
}
names = names_tmm;
}
else if (need_vex
&& bytemode != xmm_mode
&& bytemode != scalar_mode)
{
switch (vex.length)
{
@ -12629,34 +12653,6 @@ OP_XMM (int bytemode, int sizeflag ATTRIBUTE_UNUSED)
abort ();
}
}
else if (bytemode == xmmq_mode
|| bytemode == evex_half_bcst_xmmq_mode)
{
switch (vex.length)
{
case 128:
case 256:
names = names_xmm;
break;
case 512:
names = names_ymm;
break;
default:
abort ();
}
}
else if (bytemode == tmm_mode)
{
modrm.reg = reg;
if (reg >= 8)
{
oappend ("(bad)");
return;
}
names = names_tmm;
}
else if (bytemode == ymm_mode)
names = names_ymm;
else
names = names_xmm;
oappend (names[reg]);