Hi all,
The ACLE intrinsics documentation for arm can be improved a bit.
Since there are potentially other ACLE intrinsics besides the CRC32 ones
in the future, I moved the comment about their availability into the
CRC32 intrinsics subsection.
I removed the comment about the instruction form expected for AArch64
since that is a separate port and should be documented in the AArch64
section.
Tested by building the PDF doc and looking at it.
I think this should go for 4.9 as well as trunk as it is a clarification.
Ok?
Thanks,
Kyrill
2014-06-09 Kyrylo Tkachov <kyrylo.tkac...@arm.com>
* doc/arm-acle-intrinsics.texi: Specify when CRC32 intrinsics are
available.
Simplify description of __crc32d and __crc32cd intrinsics.
* doc/extend.texi (ARM ACLE Intrinsics): Remove comment about CRC32
availability.diff --git a/gcc/doc/arm-acle-intrinsics.texi b/gcc/doc/arm-acle-intrinsics.texi
index e68f4cd..8c5523e 100644
--- a/gcc/doc/arm-acle-intrinsics.texi
+++ b/gcc/doc/arm-acle-intrinsics.texi
@@ -4,6 +4,10 @@
@subsubsection CRC32 intrinsics
+These intrinsics are available when the CRC32 architecture extension is
+specified, e.g. when the @option{-march=armv8-a+crc} switch is used, or when
+the target processor specified with @option{-mcpu} supports it.
+
@itemize @bullet
@item uint32_t __crc32b (uint32_t, uint8_t)
@*@emph{Form of expected instruction(s):} @code{crc32b @var{r0}, @var{r0}, @var{r0}}
@@ -25,8 +29,7 @@
@itemize @bullet
@item uint32_t __crc32d (uint32_t, uint64_t)
@*@emph{Form of expected instruction(s):} Two @code{crc32w @var{r0}, @var{r0}, @var{r0}}
-instructions for AArch32. One @code{crc32w @var{w0}, @var{w0}, @var{x0}} instruction for
-AArch64.
+instructions.
@end itemize
@itemize @bullet
@@ -50,6 +53,5 @@ AArch64.
@itemize @bullet
@item uint32_t __crc32cd (uint32_t, uint64_t)
@*@emph{Form of expected instruction(s):} Two @code{crc32cw @var{r0}, @var{r0}, @var{r0}}
-instructions for AArch32. One @code{crc32cw @var{w0}, @var{w0}, @var{x0}} instruction for
-AArch64.
+instructions.
@end itemize
diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi
index a2fe619..a68020a 100644
--- a/gcc/doc/extend.texi
+++ b/gcc/doc/extend.texi
@@ -10519,9 +10519,6 @@ when the @option{-mfpu=neon} switch is used:
@node ARM ACLE Intrinsics
@subsection ARM ACLE Intrinsics
-These built-in intrinsics for the ARMv8-A CRC32 extension are available when
-the @option{-march=armv8-a+crc} switch is used:
-
@include arm-acle-intrinsics.texi
@node AVR Built-in Functions
