[PATCH][ARM][0/3] Implement crypto intrinsics in AArch32 ARMv8-A

[Kyrill Tkachov <kyrylo dot tkachov at arm dot com>]

Hi all,

This patch series implements the new arm_neon.h intrinsics that map down to the 
ARMv8-A cryptographic instructions. The instructions are considered to be part 
of NEON and they can be enabled by specifying -mfpu=crypto-neon-fp-armv8 (of 
course we still need the hard or softfp float ABI).

Two of the intrinsics: vmull_p64 and vmull_high_p64 use the new poly64_t and 
poly128_t types and therefore these patches also add support for these types and 
most of the intrinsics associated with creating, reinterpreting, loading, 
storing and extracting these types. Most of these auxiliary intrinsics are 
autogenerated from the neon.ml scripts in the arm backend, but some had to be 
hardcoded because they don't follow a regular pattern.
Note that these types and intrinsics are not available unless you specify the 
crypto-neon-fp-armv8 FPU.

The __ARM_FEATURE_CRYPTO feature test macro is defined and is used throughout 
arm_neon.h to gate the new types and intrinsics.


Patches 2 and 3 add the testsuite and documentation respectively. Most of it is 
autogenerated.

Bootstrapped on arm-none-linux-gnueabihf and tested on a model.

Note, this patch series' context depends on the CRC32 intrinsics patch that is 
in review at:
http://gcc.gnu.org/ml/gcc-patches/2013-11/msg02351.html

Thanks,
Kyrill


P.S. These patches only touch the arm backend and do not affect any other parts 
of the compiler.