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Diffstat (limited to 'gas/doc/as.texinfo')
| -rw-r--r-- | gas/doc/as.texinfo | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/gas/doc/as.texinfo b/gas/doc/as.texinfo index f4e0fdd..3084bcb 100644 --- a/gas/doc/as.texinfo +++ b/gas/doc/as.texinfo @@ -4479,6 +4479,7 @@ Some machine configurations provide additional directives. * MRI:: @code{.mri @var{val}} * Noaltmacro:: @code{.noaltmacro} * Nolist:: @code{.nolist} +* Nop:: @code{.nop @var{size}[, @var{control}]} * Octa:: @code{.octa @var{bignums}} * Offset:: @code{.offset @var{loc}} * Org:: @code{.org @var{new-lc}, @var{fill}} @@ -6101,6 +6102,23 @@ internal counter (which is zero initially). @code{.list} increments the counter, and @code{.nolist} decrements it. Assembly listings are generated whenever the counter is greater than zero. +@node Nop +@section @code{.nop @var{size}[, @var{control}]} + +@cindex @code{nop} directive +@cindex filling memory with no-op instructions +This directive emits @var{size} bytes filled with no-op instructions. +@var{size} is absolute expression, which must be a positve value. +@var{control} controls how no-op instructions should be generated. If +the comma and @var{control} are omitted, @var{control} is assumed to be +zero. + +Note: For Intel 80386 and AMD x86-64 targets, @var{control} specifies +the size limit of a no-op instruction. The valid values of @var{control} +are between 0 and 8 for 16-bit mode, between 0 and 10 for 32-bit mode, +between 0 and 11 for 64-bit mode. When 0 is used, the no-op instruction +size limit is set to the maximum supported size. + @node Octa @section @code{.octa @var{bignums}} |