diff options
Diffstat (limited to 'gas/doc/as.texi')
| -rw-r--r-- | gas/doc/as.texi | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/gas/doc/as.texi b/gas/doc/as.texi index 84a7e61..983cec3 100644 --- a/gas/doc/as.texi +++ b/gas/doc/as.texi @@ -6169,14 +6169,18 @@ counter, and @code{.nolist} decrements it. Assembly listings are generated whenever the counter is greater than zero. @node Nop -@section @code{.nop} +@section @code{.nop [@var{size}]} @cindex @code{nop} directive @cindex filling memory with no-op instructions -This directive emits a single no-op instruction. It is provided on all -architectures, allowing the creation of architecture neutral tests involving -actual code. The size of the generated instruction is target specific. The -instruction does affect the generation of DWARF debug line information. +This directive emits no-op instructions. It is provided on all architectures, +allowing the creation of architecture neutral tests involving actual code. The +size of the generated instruction is target specific, but if the optional +@var{size} argument is given and resolves to an absolute positive value at that +point in assembly (no forward expressions allowed) then the fewest no-op +instructions are emitted that equal or exceed a total @var{size} in bytes. +@code{.nop} does affect the generation of DWARF debug line information. +Some targets do not support using @code{.nop} with @var{size}. @node Nops @section @code{.nops @var{size}[, @var{control}]} |