diff options
| -rw-r--r-- | include/opcode/ChangeLog | 4 | ||||
| -rw-r--r-- | include/opcode/i386.h | 6 |
2 files changed, 9 insertions, 1 deletions
diff --git a/include/opcode/ChangeLog b/include/opcode/ChangeLog index edc00fa6d..13c3b4056 100644 --- a/include/opcode/ChangeLog +++ b/include/opcode/ChangeLog @@ -1,5 +1,9 @@ 2006-06-12 H.J. Lu <hongjiu.lu@intel.com> + * i386.h (i386_optab): Add "nop" with memory reference. + +2006-06-12 H.J. Lu <hongjiu.lu@intel.com> + * i386.h (i386_optab): Update comment for 64bit NOP. 2006-06-06 Ben Elliston <bje@au.ibm.com> diff --git a/include/opcode/i386.h b/include/opcode/i386.h index c46c86d4c..76b5172ef 100644 --- a/include/opcode/i386.h +++ b/include/opcode/i386.h @@ -555,7 +555,11 @@ static const template i386_optab[] = {"bound", 2, 0x62, X, Cpu186|CpuNo64, wl_Suf|Modrm, { WordReg, WordMem, 0} }, {"hlt", 0, 0xf4, X, 0, NoSuf, { 0, 0, 0} }, -/* nop is actually 'xchgl %eax, %eax'. */ + +{"nop", 1, 0x0f1f, X, Cpu686, wl_Suf|Modrm, { WordMem, 0, 0} }, + +/* nop is actually "xchg %ax,%ax" in 16bit mode, "xchg %eax,%eax" in + 32bit mode and "xchg %rax,%rax" in 64bit mode. */ {"nop", 0, 0x90, X, 0, NoSuf, { 0, 0, 0} }, /* Protection control. */ |