[PATCH 1/1] RISC-V: Add Zfbfmin extension to the -march= option

This patch would like to add new sub extension (aka Zfbfmin) to the
-march= option. It introduces a new data type BF16.

1 The Zfbfmin extension depend on 'F', and the FLH, FSH, FMV.X.H, and
FMV.H.X instructions as defined in the Zfh extension.

2 The Zfhmin extension includes the following instructions from the
Zfh extension: FLH, FSH, FMV.X.H, FMV.H.X, FCVT.S.H, and FCVT.H.S.

3 Zfhmin extension depend on 'F'.

4 Simply put, just make Zfbfmin dependent on Zfhmin.

Perhaps in the future, we could propose making the FLH, FSH, FMV.X.H, and
FMV.H.X instructions an independent extension to achieve precise dependency
relationships for the Zfbfmin.

You can locate more information about Zfbfmin from below spec doc.

<https://github.com/riscv/riscv-bfloat16/releases/download/v59042fc71c31a9bcb2f1957621c960ed36fac401/riscv-bfloat16.pdf>

gcc/
	* common/config/riscv/riscv-common.cc (riscv_implied_info): zfbfmin
	implies zfhmin.
	(riscv_ext_version_table, riscv_ext_flag_table): Add zfbfmin.
	* config/riscv/riscv.opt (ZFBFMIN): Add optoion.

gcc/testsuite/
	* gcc.target/riscv/arch-35.c: New test.
	* gcc.target/riscv/arch-36.c: New test.
	* gcc.target/riscv/predef-34.c: New test.
	* gcc.target/riscv/predef-35.c: New test.

0 files changed, 0 insertions, 0 deletions