Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

rv32zbf-invalid.s
# RUN: not llvm-mc -triple riscv32 -mattr=+experimental-zbf < %s 2>&1 | FileCheck %s

# Too few operands
bfp t0, t1 # CHECK: :[[@LINE]]:1: error: too few operands for instruction
bfpw t0, t1, t2 # CHECK: :[[@LINE]]:1: error: instruction requires the following: RV64I Base Instruction Set