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x86: make PUSH/POP disassembly uniform

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Irrespective of their encoding the resulting output should look the
same. Therefore wire the handling of PUSH/POP with GPR operands
encoded in the main opcode byte to the same logic used for other
operands. This frees up yet another macro character.
This commit is contained in:
Jan Beulich
2020-07-15 08:55:20 +02:00
parent e2e018c340
commit c3f5525ff1
2 changed files with 27 additions and 30 deletions
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7
opcodes/ChangeLog
View File

@ -1,3 +1,10 @@
2020-07-15 Jan Beulich <jbeulich@suse.com>
* i386-dis.c (dis386): Adjust 'V' description. Use P-based
construct for push/pop of register.
(putop): Honor cond when handling 'P'. Drop handling of plain
'V'.
2020-07-15 Jan Beulich <jbeulich@suse.com>
* i386-dis.c (dis386): Adjust 'P', 'T', 'U', and '@'

50
opcodes/i386-dis.c
View File

@ -1747,8 +1747,7 @@ struct dis386 {
'T' => print 'w', 'l'/'d', or 'q' if instruction has an operand size
prefix or if suffix_always is true.
'U' unused.
'V' => print 'q' in 64bit mode if instruction has no operand size
prefix and behave as 'S' otherwise
'V' unused.
'W' => print 'b', 'w' or 'l' ('d' in Intel mode)
'X' => print 's', 'd' depending on data16 prefix (for XMM)
'Y' unused.
@ -1877,23 +1876,23 @@ static const struct dis386 dis386[] = {
{ "dec{S|}", { RMeSI }, 0 },
{ "dec{S|}", { RMeDI }, 0 },
/* 50 */
{ "pushV", { RMrAX }, 0 },
{ "pushV", { RMrCX }, 0 },
{ "pushV", { RMrDX }, 0 },
{ "pushV", { RMrBX }, 0 },
{ "pushV", { RMrSP }, 0 },
{ "pushV", { RMrBP }, 0 },
{ "pushV", { RMrSI }, 0 },
{ "pushV", { RMrDI }, 0 },
{ "push{!P|}", { RMrAX }, 0 },
{ "push{!P|}", { RMrCX }, 0 },
{ "push{!P|}", { RMrDX }, 0 },
{ "push{!P|}", { RMrBX }, 0 },
{ "push{!P|}", { RMrSP }, 0 },
{ "push{!P|}", { RMrBP }, 0 },
{ "push{!P|}", { RMrSI }, 0 },
{ "push{!P|}", { RMrDI }, 0 },
/* 58 */
{ "popV", { RMrAX }, 0 },
{ "popV", { RMrCX }, 0 },
{ "popV", { RMrDX }, 0 },
{ "popV", { RMrBX }, 0 },
{ "popV", { RMrSP }, 0 },
{ "popV", { RMrBP }, 0 },
{ "popV", { RMrSI }, 0 },
{ "popV", { RMrDI }, 0 },
{ "pop{!P|}", { RMrAX }, 0 },
{ "pop{!P|}", { RMrCX }, 0 },
{ "pop{!P|}", { RMrDX }, 0 },
{ "pop{!P|}", { RMrBX }, 0 },
{ "pop{!P|}", { RMrSP }, 0 },
{ "pop{!P|}", { RMrBP }, 0 },
{ "pop{!P|}", { RMrSI }, 0 },
{ "pop{!P|}", { RMrDI }, 0 },
/* 60 */
{ X86_64_TABLE (X86_64_60) },
{ X86_64_TABLE (X86_64_61) },
@ -10647,7 +10646,8 @@ putop (const char *in_template, int sizeflag)
case 'P':
if (l == 0)
{
if (need_modrm && modrm.mod == 3 && !(sizeflag & SUFFIX_ALWAYS))
if (((need_modrm && modrm.mod == 3) || !cond)
&& !(sizeflag & SUFFIX_ALWAYS))
break;
/* Fall through. */
case 'T':
@ -10744,17 +10744,7 @@ putop (const char *in_template, int sizeflag)
break;
case 'V':
if (l == 0)
{
if (intel_syntax)
break;
if (address_mode == mode_64bit
&& ((sizeflag & DFLAG) || (rex & REX_W)))
{
if (sizeflag & SUFFIX_ALWAYS)
*obufp++ = 'q';
break;
}
}
abort ();
else if (l == 1 && last[0] == 'L')
{
if (rex & REX_W)