[Bug gas/15504] New: incorrect error message when using LTR opcode with a register operand

2013-05-20 Thread joel.nider at gmail dot com
http://sourceware.org/bugzilla/show_bug.cgi?id=15504

 Bug #: 15504
   Summary: incorrect error message when using LTR opcode with a
register operand
   Product: binutils
   Version: 2.22
Status: NEW
  Severity: normal
  Priority: P2
 Component: gas
AssignedTo: unassig...@sourceware.org
ReportedBy: joel.ni...@gmail.com
Classification: Unclassified


When assembling the 'ltr' opcode with a register (%eax) as an operand, gas
gives the following error:
Error: operand type mismatch for 'ltr'

This was discovered by compiling the following inline assembler in GCC:

asm("ltr %0\n" :: am(index) );

When compiled with O0, it was compiled to:

ltr -16(%ebp)

Which assembles correctly.  However, when using O1 (or O2) the compiler knows
to save this value in a register rather than on the stack, producing:

ltr %eax

According to the Intel software manual (document 325462.pdf) it is valid to
give either a register name or memory location as an operand. Therefore I must
conclude that the compiler behaved correctly, and the assembler is incorrectly
rejecting a register as an operand to this instruction.

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[Bug gas/15504] incorrect error message when using LTR opcode with a register operand

2013-05-20 Thread joel.nider at gmail dot com
http://sourceware.org/bugzilla/show_bug.cgi?id=15504

Joel Nider  changed:

   What|Removed |Added

 CC||joel.nider at gmail dot com
   Host||Ubuntu 12.04 32-bit

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[Bug gas/15504] i386: incorrect error message when using LTR opcode with a register operand

2013-05-20 Thread joel.nider at gmail dot com
http://sourceware.org/bugzilla/show_bug.cgi?id=15504

Joel Nider  changed:

   What|Removed |Added

Summary|incorrect error message |i386: incorrect error
   |when using LTR opcode with  |message when using LTR
   |a register operand  |opcode with a register
   ||operand

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