[RFA/ARM 01/21] Add command line and object file support for ARMv8-A

[Matthew Gretton-Dann]

This patch adds the basic infrastructure to support ARMv8 A32/T32
instruction sets in binutils.  It also contains the necessary changes to
output the correct attributes.

A new architecture is added: -march=armv8-a.

New architecture extensions are added:
	+crypto (Crypto extensions implies +fp+simd)
	+fp (FP)
	+simd (Advanced SIMD Extensions implies +fp)

We also update the attributes emitted by the tools to support these new
features.

The ABI adds new values to Tag_CPU_arch, Tag_FP_arch, and
Tag_Advanced_SIMD_arch for ARMv8.  It also changes the meaning of
Tag_FP_HP_extension so that for VFPv4/SIMDv2 the appropriate value is
now 0 instead of 1.

OK?

bfd/ChangeLog:
2012-08-23  Matthew Gretton-Dann  <matthew.gretton-dann@arm.com>

	* elf32-arm.c (v8): New array.
	(tag_cpu_arch_combine): Add support for ARMv8 attributes.
	(elf32_arm_merge_eabi_attributes): Likewise.
	(VFP_VERSION_COUNT): New define.

binutils/ChangeLog:
2012-08-23  Matthew Gretton-Dann  <matthew.gretton-dann@arm.com>

	* readelf.c (arm_attr_tag_CPU_arch): Update for ARMv8.
	(arm_attr_tag_FP_arch): Likewise.
	(arm_attr_tag_Advanced_SIMD_arch): Likewise.

gas/ChangeLog:
2012-08-23 Matthew Gretton-Dann  <matthew.gretton-dann@arm.com>

	* config/tc-arm.h (arm_ext_v8): New variable.
	(fpu_vfp_ext_armv8): Likewise.
	(fpu_neon_ext_armv8): Likewise.
	(fpu_crypto_ext_armv8): Likewise.
	(arm_archs): Add armv8-a.
	(arm_extensions): Add crypto, fp, and simd.
	(arm_fpus): Add fp-armv8, neon-fp-armv8, crypto-neon-fp-armv8.
	(cpu_arch_ver): Add support for ARMv8.
	(aeabi_set_public_sttributes): Likewise.
	* doc/c-arm.texi (ARM Options): Document new architecture and
	extension options for ARMv8.

gas/testsuite/ChangeLog:
2012-08-23 Matthew Gretton-Dann  <matthew.gretton-dann@arm.com>

	* gas/arm/attr-march-all.d: Update for change in expected
	output.
	* gas/arm/attr-mfpu-vfpv4-d16.d: Likewise.
	* gas/arm/attr-mfpu-vfpv4.d: Likewise.
	* gas/arm/attr-march-armv8-a+crypto.d: New testcase.
	* gas/arm/attr-march-armv8-a+fp.d: Likewise.
	* gas/arm/attr-march-armv8-a+simd.d: Likewise.
	* gas/arm/attr-march-armv8-a.d: Likewise.

include/ChangeLog:
2012-08-23  Matthew Gretton-Dann  <matthew.gretton-dann@arm.com>

	* elf/arm.h (TAG_CPU_ARCH_V8): New define.
	(MAX_TAG_CPU_ARCH): Update.
	* opcode/arm.h (ARM_EXT_V8): New define.
	(FPU_VFP_EXT_ARMV8): Likewise.
	(FPU_NEON_EXT_ARMV8): Likewise.
	(FPU_CRYPTO_EXT_ARMV8): Likewise.
	(ARM_AEXT_V8A): Likewise.
	(FPU_VFP_ARMV8): Likwise.
	(FPU_NEON_ARMV8): Likewise.
	(FPU_CRYPTO_ARMV8): Likewise.
	(FPU_ARCH_VFP_ARMV8): Likewise.
	(FPU_ARCH_NEON_VFP_ARMV8): Likewise.
	(FPU_ARCH_CRYPTO_NEON_VFP_ARMV8): Likewise.
	(ARM_ARCH_V8A): Likwise.
	(ARM_ARCH_V8A_FP): Likewise.
	(ARM_ARCH_V8A_SIMD): Likewise.
	(ARM_ARCH_V8A_CRYPTO): Likewise.

ld/testsuite/ChangeLog:

2012-08-23  Matthew Gretton-Dann  <matthew.gretton-dann@arm.com>

	* ld-arm/arm-elf.exp: Add new testcases.
	* ld-arm/attr-merge-vfp-3.d: Update for change in expected
	output.
	* ld-arm/attr-merge-vfp-3r.d: Likewise.
	* ld-arm/attr-merge-vfp-4.d: Likewise.
	* ld-arm/attr-merge-vfp-4r.d: Likewise.
	* ld-arm/attr-merge-vfp-5.d: Likewise.
	* ld-arm/attr-merge-vfp-5r.d: Likewise.
	* ld-arm/attr-merge-vfp-7.d: New testcase.
	* ld-arm/attr-merge-vfp-7r.d: Likewise.
	* ld-arm/attr-merge-vfp-armv8-hard.s: Likewise.
	* ld-arm/attr-merge-vfp-armv8.s: Likewise.
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