[AArch64] Implement CRC32 ACLE intrinsics.

	* config.gcc (aarch64*-*-*): Add arm_acle.h to extra headers.
	* Makefile.in (TEXI_GCC_FILES): Add aarch64-acle-intrinsics.texi to
	dependencies.
	* config/aarch64/aarch64-builtins.c (AARCH64_CRC32_BUILTINS): Define.
	(aarch64_crc_builtin_datum): New struct.
	(aarch64_crc_builtin_data): New.
	(aarch64_init_crc32_builtins): New function.
	(aarch64_init_builtins): Initialise CRC32 builtins when appropriate.
	(aarch64_crc32_expand_builtin): New.
	(aarch64_expand_builtin): Add CRC32 builtin expansion case.
	* config/aarch64/aarch64.h (TARGET_CPU_CPP_BUILTINS): Define
	__ARM_FEATURE_CRC32 when appropriate.
	(TARGET_CRC32): Define.
	* config/aarch64/aarch64.md (UNSPEC_CRC32B, UNSPEC_CRC32H,
	UNSPEC_CRC32W, UNSPEC_CRC32X, UNSPEC_CRC32CB, UNSPEC_CRC32CH,
	UNSPEC_CRC32CW, UNSPEC_CRC32CX): New unspec values.
	(aarch64_<crc_variant>): New pattern.
	* config/aarch64/arm_acle.h: New file.
	* config/aarch64/iterators.md (CRC): New int iterator.
	(crc_variant, crc_mode): New int attributes.
	* doc/aarch64-acle-intrinsics.texi: New file.
	* doc/extend.texi (aarch64): Document aarch64 ACLE intrinsics.
	Include aarch64-acle-intrinsics.texi.

From-SVN: r211440

2 files changed, 61 insertions, 0 deletions

diff --git a/gcc/doc/aarch64-acle-intrinsics.texi b/gcc/doc/aarch64-acle-intrinsics.texi
new file mode 100644
index 0000000..3194511
--- /dev/null
+++ b/gcc/doc/aarch64-acle-intrinsics.texi
@@ -0,0 +1,55 @@
+@c Copyright (C) 2014 Free Software Foundation, Inc.
+@c This is part of the GCC manual.
+@c For copying conditions, see the file gcc.texi.
+
+@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{w0}, @var{w1}, @var{w2}}
+@end itemize
+
+
+@itemize @bullet
+@item uint32_t __crc32h (uint32_t, uint16_t)
+@*@emph{Form of expected instruction(s):} @code{crc32h @var{w0}, @var{w1}, @var{w2}}
+@end itemize
+
+
+@itemize @bullet
+@item uint32_t __crc32w (uint32_t, uint32_t)
+@*@emph{Form of expected instruction(s):} @code{crc32w @var{w0}, @var{w1}, @var{w2}}
+@end itemize
+
+
+@itemize @bullet
+@item uint32_t __crc32d (uint32_t, uint64_t)
+@*@emph{Form of expected instruction(s):} @code{crc32x @var{w0}, @var{w1}, @var{x2}}
+@end itemize
+
+@itemize @bullet
+@item uint32_t __crc32cb (uint32_t, uint8_t)
+@*@emph{Form of expected instruction(s):} @code{crc32cb @var{w0}, @var{w1}, @var{w2}}
+@end itemize
+
+
+@itemize @bullet
+@item uint32_t __crc32ch (uint32_t, uint16_t)
+@*@emph{Form of expected instruction(s):} @code{crc32ch @var{w0}, @var{w1}, @var{w2}}
+@end itemize
+
+
+@itemize @bullet
+@item uint32_t __crc32cw (uint32_t, uint32_t)
+@*@emph{Form of expected instruction(s):} @code{crc32cw @var{w0}, @var{w1}, @var{w2}}
+@end itemize
+
+
+@itemize @bullet
+@item uint32_t __crc32cd (uint32_t, uint64_t)
+@*@emph{Form of expected instruction(s):} @code{crc32cx @var{w0}, @var{w1}, @var{x2}}
+@end itemize
diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi
index a79dbbf..c34c1b6 100644
--- a/gcc/doc/extend.texi
+++ b/gcc/doc/extend.texi
@@ -9697,6 +9697,7 @@ instructions, but allow the compiler to schedule those calls.
 
 @menu
 * AArch64 Built-in Functions::
+* AArch64 intrinsics::
 * Alpha Built-in Functions::
 * Altera Nios II Built-in Functions::
 * ARC Built-in Functions::
@@ -9742,6 +9743,11 @@ unsigned int __builtin_aarch64_get_fpsr ()
 void __builtin_aarch64_set_fpsr (unsigned int)
 @end smallexample
 
+@node AArch64 intrinsics
+@subsection ACLE Intrinsics for AArch64
+
+@include aarch64-acle-intrinsics.texi
+
 @node Alpha Built-in Functions
 @subsection Alpha Built-in Functions