[PATCH V3] RISC-V: Add rounding mode operand for fixed-point patterns

[Jeff Law]

On 5/15/23 04:25, juzhe.zhong@rivai.ai wrote:
> From: Juzhe-Zhong <juzhe.zhong@rivai.ai>
> 
> Since we are going to have fixed-point intrinsics that are modeling rounding mode
> https://github.com/riscv-non-isa/rvv-intrinsic-doc/pull/222
> 
> We should have operand to specify rounding mode in fixed-point instructions.
> We don't support these modeling rounding mode intrinsics yet but we will definetely
> support them later.
> 
> This is the preparing patch for new coming intrinsics.
> 
> gcc/ChangeLog:
> 
>          * config/riscv/riscv-protos.h (enum vxrm_field_enum): New enum.
>          * config/riscv/riscv-vector-builtins.cc (function_expander::use_exact_insn): Add default rounding mode operand.
>          * config/riscv/riscv.cc (riscv_hard_regno_nregs): Add VXRM_REGNUM.
>          (riscv_hard_regno_mode_ok): Ditto.
>          (riscv_conditional_register_usage): Ditto.
>          * config/riscv/riscv.h (DWARF_FRAME_REGNUM): Ditto.
>          (VXRM_REG_P): Ditto.
>          (RISCV_DWARF_VXRM): Ditto.
>          * config/riscv/riscv.md: Ditto.
>          * config/riscv/vector.md: Ditto.
OK.
jeff