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[AARCH64] Document .arch and .arch_extension directive

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2015-02-03  Renlin Li  <renlin.li@arm.com>

  gas/
    * doc/c-aarch64.texi (.arch): Document the directive.
    (.arch_extension): Likewise.
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Jiong Wang 2015-02-03 14:02:24 +00:00
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gas/ChangeLog
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@ -1,3 +1,8 @@
2015-02-03 Renlin Li <renlin.li@arm.com>
* doc/c-aarch64.texi (.arch): Document the directive.
(.arch_extension): Likewise.
2015-02-03 Nick Clifton <nickc@redhat.com>
* config/tc-rl78.h (TC_PARSE_CONS_EXPRESSION): Define.

18
gas/doc/c-aarch64.texi
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@ -232,6 +232,24 @@ The AArch64 architecture uses @sc{ieee} floating-point numbers.
@table @code
@c AAAAAAAAAAAAAAAAAAAAAAAAA
@cindex @code{.arch} directive, AArch64
@item .arch @var{name}
Select the target architecture. Valid values for @var{name} are the same as
for the @option{-march} commandline option.
Specifying @code{.arch} clears any previously selected architecture
extensions.
@cindex @code{.arch_extension} directive, AArch64
@item .arch_extension @var{name}
Add or remove an architecture extension to the target architecture. Valid
values for @var{name} are the same as those accepted as architectural
extensions by the @option{-mcpu} commandline option.
@code{.arch_extension} may be used multiple times to add or remove extensions
incrementally to the architecture being compiled for.
@c BBBBBBBBBBBBBBBBBBBBBBBBBB
@cindex @code{.bss} directive, AArch64