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[PATCH] Documentation: NEON alignment specifiers
- From: Daniel Gutson <dgutson at codesourcery dot com>
- To: binutils at sourceware dot org
- Date: Sun, 27 Dec 2009 23:29:04 -0300
- Subject: [PATCH] Documentation: NEON alignment specifiers
The attached patch enhances the GAS documentation by mentioning that the
NEON alignment specifier is the ':' rather than the '@' specified by the
ARM documentation.
Please let me know if OK to commit.
Thanks,
Daniel.
ChangeLog:
2009-12-27 Daniel Gutson <dgutson@codesourcery.com>
gas/
* doc-c-arm.texi: Document NEON alignment specifiers.
--
Daniel Gutson
CodeSourcery
www.codesourcery.com
Index: gas/doc/c-arm.texi
===================================================================
RCS file: /cvs/src/src/gas/doc/c-arm.texi,v
retrieving revision 1.66
diff -u -p -r1.66 c-arm.texi
--- gas/doc/c-arm.texi 17 Nov 2009 16:31:50 -0000 1.66
+++ gas/doc/c-arm.texi 28 Dec 2009 02:24:37 -0000
@@ -339,6 +339,7 @@ features. The default is to warn.
* ARM-Chars:: Special Characters
* ARM-Regs:: Register Names
* ARM-Relocations:: Relocations
+* ARM-Neon-Alignment:: NEON Alignment Specifiers
@end menu
@node ARM-Instruction-Set
@@ -406,6 +407,21 @@ Either @samp{#} or @samp{$} can be used
@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