diff options
| author | H.J. Lu <hjl@lucon.org> | 2006-06-12 18:55:44 +0000 |
|---|---|---|
| committer | H.J. Lu <hjl@lucon.org> | 2006-06-12 18:55:44 +0000 |
| commit | 47027494566cf62a7fa3583701fec2cd68c6b8ff (patch) | |
| tree | d7de54026a6348a727ae8bb4e5edca451c4745e5 /opcodes | |
| parent | a64abfed593f552156806dc8749c383bc6ec915d (diff) | |
| download | gdb-47027494566cf62a7fa3583701fec2cd68c6b8ff.tar.gz | |
gas/
2006-06-12 H.J. Lu <hongjiu.lu@intel.com>
* config/tc-i386.c (process_suffix): Don't add rex64 for
"xchg %rax,%rax".
gas/testsuite/
2006-06-12 H.J. Lu <hongjiu.lu@intel.com>
* gas/i386/opcode.s: Add "xchg %ax,%ax".
* gas/i386/opcode.d: Updated.
* gas/i386/x86-64-opcode.s: Add xchg %ax,%ax, xchg %eax,%eax,
xchg %rax,%rax, rex64 xchg %rax,%rax and xchg %rax,%r8.
* gas/i386/x86-64-opcode.d: Updated.
include/opcode/
2006-06-12 H.J. Lu <hongjiu.lu@intel.com>
* i386.h (i386_optab): Update comment for 64bit NOP.
opcodes/
2006-06-12 H.J. Lu <hongjiu.lu@intel.com>
* i386-dis.c (NOP_Fixup): Removed.
(NOP_Fixup1): New.
(NOP_Fixup2): Likewise.
(dis386): Use NOP_Fixup1 and NOP_Fixup2 on 0x90.
Diffstat (limited to 'opcodes')
| -rw-r--r-- | opcodes/ChangeLog | 7 | ||||
| -rw-r--r-- | opcodes/i386-dis.c | 26 |
2 files changed, 29 insertions, 4 deletions
diff --git a/opcodes/ChangeLog b/opcodes/ChangeLog index 0357828ce21..826c54ec912 100644 --- a/opcodes/ChangeLog +++ b/opcodes/ChangeLog @@ -1,3 +1,10 @@ +2006-06-12 H.J. Lu <hongjiu.lu@intel.com> + + * i386-dis.c (NOP_Fixup): Removed. + (NOP_Fixup1): New. + (NOP_Fixup2): Likewise. + (dis386): Use NOP_Fixup1 and NOP_Fixup2 on 0x90. + 2006-06-12 Julian Brown <julian@codesourcery.com> * arm-dis.c (print_insn_neon): Disassemble 32-bit immediates as signed diff --git a/opcodes/i386-dis.c b/opcodes/i386-dis.c index 39016193b59..49a3e9ff72e 100644 --- a/opcodes/i386-dis.c +++ b/opcodes/i386-dis.c @@ -91,7 +91,8 @@ static void OP_M (int, int); static void OP_VMX (int, int); static void OP_0fae (int, int); static void OP_0f07 (int, int); -static void NOP_Fixup (int, int); +static void NOP_Fixup1 (int, int); +static void NOP_Fixup2 (int, int); static void OP_3DNowSuffix (int, int); static void OP_SIMD_Suffix (int, int); static void SIMD_Fixup (int, int); @@ -679,7 +680,7 @@ static const struct dis386 dis386[] = { { "movQ", Sw, Sv, XX }, { "popU", stackEv, XX, XX }, /* 90 */ - { "nop", NOP_Fixup, 0, XX, XX }, + { "xchgS", NOP_Fixup1, eAX_reg, NOP_Fixup2, eAX_reg, XX }, { "xchgS", RMeCX, eAX, XX }, { "xchgS", RMeDX, eAX, XX }, { "xchgS", RMeBX, eAX, XX }, @@ -4360,12 +4361,29 @@ OP_0fae (int bytemode, int sizeflag) OP_E (bytemode, sizeflag); } +/* NOP is an alias of "xchg %ax,%ax" in 16bit mode, "xchg %eax,%eax" in + 32bit mode and "xchg %rax,%rax" in 64bit mode. NOP with REPZ prefix + is called PAUSE. We display "xchg %ax,%ax" instead of "data16 nop". + */ + static void -NOP_Fixup (int bytemode ATTRIBUTE_UNUSED, int sizeflag ATTRIBUTE_UNUSED) +NOP_Fixup1 (int bytemode, int sizeflag) { - /* NOP with REPZ prefix is called PAUSE. */ if (prefixes == PREFIX_REPZ) strcpy (obuf, "pause"); + else if (prefixes == PREFIX_DATA + || ((rex & REX_MODE64) && rex != 0x48)) + OP_REG (bytemode, sizeflag); + else + strcpy (obuf, "nop"); +} + +static void +NOP_Fixup2 (int bytemode, int sizeflag) +{ + if (prefixes == PREFIX_DATA + || ((rex & REX_MODE64) && rex != 0x48)) + OP_IMREG (bytemode, sizeflag); } static const char *const Suffix3DNow[] = { |