diff options
Diffstat (limited to 'gas/doc/c-arm.texi')
| -rw-r--r-- | gas/doc/c-arm.texi | 61 |
1 files changed, 30 insertions, 31 deletions
diff --git a/gas/doc/c-arm.texi b/gas/doc/c-arm.texi index 764b791..52f5679 100644 --- a/gas/doc/c-arm.texi +++ b/gas/doc/c-arm.texi @@ -1,5 +1,4 @@ -@c Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, -@c 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc. +@c Copyright 1996-2013 Free Software Foundation, Inc. @c This is part of the GAS manual. @c For copying conditions, see the file as.texinfo. @@ -390,29 +389,29 @@ ARM and THUMB instructions had their own, separate syntaxes. The new, @code{unified} syntax, which can be selected via the @code{.syntax} directive, and has the following main features: -@table @bullet -@item +@table @code +@item 1 Immediate operands do not require a @code{#} prefix. -@item +@item 2 The @code{IT} instruction may appear, and if it does it is validated against subsequent conditional affixes. In ARM mode it does not generate machine code, in THUMB mode it does. -@item +@item 3 For ARM instructions the conditional affixes always appear at the end of the instruction. For THUMB instructions conditional affixes can be used, but only inside the scope of an @code{IT} instruction. -@item +@item 4 All of the instructions new to the V6T2 architecture (and later) are available. (Only a few such instructions can be written in the @code{divided} syntax). -@item +@item 5 The @code{.N} and @code{.W} suffixes are recognized and honored. -@item +@item 6 All instructions set the flags if and only if they have an @code{s} affix. @end table @@ -451,28 +450,6 @@ Either @samp{#} or @samp{$} can be used to indicate immediate operands. @cindex register names, ARM *TODO* Explain about ARM register naming, and the predefined names. -@node ARM-Neon-Alignment -@subsection NEON Alignment Specifiers - -@cindex alignment for NEON instructions -Some NEON load/store instructions allow an optional address -alignment qualifier. -The ARM documentation specifies that this is indicated by -@samp{@@ @var{align}}. However GAS already interprets -the @samp{@@} character as a "line comment" start, -so @samp{: @var{align}} is used instead. For example: - -@smallexample - vld1.8 @{q0@}, [r0, :128] -@end smallexample - -@node ARM Floating Point -@section Floating Point - -@cindex floating point, ARM (@sc{ieee}) -@cindex ARM floating point (@sc{ieee}) -The ARM family uses @sc{ieee} floating-point numbers. - @node ARM-Relocations @subsection ARM relocation generation @@ -519,6 +496,28 @@ respectively. For example to load the 32-bit address of foo into r0: MOVT r0, #:upper16:foo @end smallexample +@node ARM-Neon-Alignment +@subsection NEON Alignment Specifiers + +@cindex alignment for NEON instructions +Some NEON load/store instructions allow an optional address +alignment qualifier. +The ARM documentation specifies that this is indicated by +@samp{@@ @var{align}}. However GAS already interprets +the @samp{@@} character as a "line comment" start, +so @samp{: @var{align}} is used instead. For example: + +@smallexample + vld1.8 @{q0@}, [r0, :128] +@end smallexample + +@node ARM Floating Point +@section Floating Point + +@cindex floating point, ARM (@sc{ieee}) +@cindex ARM floating point (@sc{ieee}) +The ARM family uses @sc{ieee} floating-point numbers. + @node ARM Directives @section ARM Machine Directives |