[PATCH v2] RISC-V: Minimal support for svvptc extension.

This patch support svvptc extension[1]. To enable GCC to recognize and process svvptc extension correctly at compile time. [1] https://github.com/riscv/riscv-svvptc gcc/ChangeLog: * common/config/riscv/riscv-common.cc: New extension. * common/config/riscv/riscv-ext-bitmask.def (

Re: [PATCH v2] RISC-V: Minimal support for svvptc extension.

Hi Dongyan: Thanks for your patch, it seems good but just a few minor comments :) > @@ -1721,6 +1722,9 @@ static const riscv_ext_flag_table_t > riscv_ext_flag_table[] = >RISCV_EXT_FLAG_ENTRY ("svinval", x_riscv_sv_subext, MASK_SVINVAL), >RISCV_EXT_FLAG_ENTRY ("svnapot", x_riscv_sv_subext