[PATCH v3 1/3] aarch64: Add march flags for +fp8 arch extensions

[Claudio Bantaloukas]

This introduces the relevant flags to enable access to the fpmr register and fp8 intrinsics, which will be added subsequently.

gcc/ChangeLog:

	* config/aarch64/aarch64-option-extensions.def (fp8): New.
	* config/aarch64/aarch64.h (TARGET_FP8): Likewise.
	* doc/invoke.texi (AArch64 Options): Document new -march flags
	and extensions.

gcc/testsuite/ChangeLog:

	* gcc.target/aarch64/acle/fp8.c: New test.
---
 .../aarch64/aarch64-option-extensions.def     |  2 ++
 gcc/config/aarch64/aarch64.h                  |  3 +++
 gcc/doc/invoke.texi                           |  2 ++
 gcc/testsuite/gcc.target/aarch64/acle/fp8.c   | 20 +++++++++++++++++++
 4 files changed, 27 insertions(+)
 create mode 100644 gcc/testsuite/gcc.target/aarch64/acle/fp8.c

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