riscv_ext_rve_h_fix

Fix: Add conflicting combination E and H

• Status: Merged for Binutils 2.42
• Branch: riscv-ext-rve-h-fix
• Tracking PR: #123 (view Pull Request and Diff)
• Mailing List:
  • PATCH v1 (2023-08-08)

Issue Solved

According to the ratified privileged specification (version 20211203), it says:

The hypervisor extension depends on an "I" base integer ISA with 32 x registers (RV32I or RV64I), not RV32E, which has only 16 x registers.

Also in the latest draft, it also prohibits RV64E with the H extension.

This commit prohibits the combination of E and H extensions.