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Andrew Senkevich e4e00185b5 Add option -mfence-as-lock-add=[no|yes]. 
With -mfence-as-lock-add=yes lfence, mfence and sfence will be encoded
as lock addl $0x0, (%{r,e}sp).

gas/:

    * config/tc-i386.c (avoid_fence): New.
    (output_insn): Encode as lock addl $0x0, (%{r,e}sp) if avoid_fence
    is true.
    (OPTION_FENCE_AS_LOCK_ADD): New.
    (md_longopts): Add -mfence-as-lock-add.
    (md_parse_option): Handle -mfence-as-lock-add.
    (md_show_usage): Add -mfence-as-lock-add=[no|yes].
    * doc/c-i386.texi (-mfence-as-lock-add): Document.

gas/testsuite/:

    * gas/i386/i386.exp: Run new tests.
    * gas/i386/fence-as-lock-add.s: New.
    * gas/i386/fence-as-lock-add-yes.d: Likewise.
    * gas/i386/fence-as-lock-add-no.d: Likewise.
    * gas/i386/x86-64-fence-as-lock-add-yes.d: Likewise.
    * gas/i386/x86-64-fence-as-lock-add-no.d: Likewise.
 		2016-01-29 15:46:50 +03:00
..
Makefile.am Copyright update for binutils 2016-01-01 23:00:01 +10:30
Makefile.in Copyright update for binutils 2016-01-01 23:00:01 +10:30
all.texi Copyright update for binutils 2016-01-01 23:00:01 +10:30
as.texinfo Upda the documentation on assembler error message generation. 2016-01-20 16:21:34 +00:00
c-aarch64.texi Copyright update for binutils 2016-01-01 23:00:01 +10:30
c-alpha.texi Copyright update for binutils 2016-01-01 23:00:01 +10:30
c-arc.texi Copyright update for binutils 2016-01-01 23:00:01 +10:30
c-arm.texi Add support for an ARM specific 'y' section attribute flag to mark the section as NOREAD. 2016-01-20 12:53:50 +00:00
c-avr.texi Copyright update for binutils 2016-01-01 23:00:01 +10:30
c-bfin.texi Copyright update for binutils 2016-01-01 23:00:01 +10:30
c-cr16.texi Copyright update for binutils 2016-01-01 23:00:01 +10:30
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c-hppa.texi Copyright update for binutils 2016-01-01 23:00:01 +10:30
c-i370.texi Copyright update for binutils 2016-01-01 23:00:01 +10:30
c-i386.texi Add option -mfence-as-lock-add=[no|yes]. 2016-01-29 15:46:50 +03:00
c-i860.texi Copyright update for binutils 2016-01-01 23:00:01 +10:30
c-i960.texi Copyright update for binutils 2016-01-01 23:00:01 +10:30
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