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Re: gas: bmi


Hi Christopher,

(I may have sent this to the wrong list... resubmitting...)

You have found the correct list now.



Hey guys, how do I get gas to output the BEXTR instruction?

Try searching for it in the GAS testsuite. For example: gas/testsuite/gas/i386/x86-64-tbm.s. So based on that, this should work:


% cat fred.s

         .allow_index_reg
        .text

_start:

BEXTR $0x0,%eax,%r15d

  % as fred.s -o fred.o
  % objdump -d fred.o
  Disassembly of section .text:

  0000000000000000 <_start>:
     0:   8f 6a 78 10 f8 00 00    bextr  $0x0,%eax,%r15d
     7:   00 00


Cheers Nick


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