RISC-V: Add minimal support for 7 new unprivileged extensions

The RISC-V Profiles specification here:
https://github.com/riscv/riscv-profiles/blob/main/profiles.adoc#7-new-isa-extensions

These extensions don't add any new features but
describe existing features. So this patch only adds parsing.

Za64rs: Reservation set size of 64 bytes
Za128rs: Reservation set size of 128 bytes
Ziccif: Main memory supports instruction fetch with atomicity requirement
Ziccrse: Main memory supports forward progress on LR/SC sequences
Ziccamoa: Main memory supports all atomics in A
Zicclsm: Main memory supports misaligned loads/stores
Zic64b: Cache block size isf 64 bytes

gcc/ChangeLog:

	* common/config/riscv/riscv-common.cc: Add Za64rs, Za128rs,
	Ziccif, Ziccrse, Ziccamoa, Zicclsm, Zic64b items.
	* config/riscv/riscv.opt: New macro for 7 new unprivileged
	extensions.
	* doc/invoke.texi (RISC-V Options): Add Za64rs, Za128rs,
	Ziccif, Ziccrse, Ziccamoa, Zicclsm, Zic64b extensions.
gcc/testsuite/ChangeLog:

	* gcc.target/riscv/za-ext.c: New test.
	* gcc.target/riscv/zi-ext.c: New test.

0 files changed, 0 insertions, 0 deletions