Disable Zfh{min} when misa.F is cleared

3 years ago · d90f290f55
1 changed files with 2 additions and 0 deletions
--- a/riscv/csrs.cc
+++ b/riscv/csrs.cc
@ -640,6 +640,8 @@ bool misa_csr_t::unlogged_write(const reg_t val) noexcept {
  proc->set_extension_enable(EXT_ZCB, proc->extension_enabled(EXT_ZCA));
  proc->set_extension_enable(EXT_ZCMP, proc->extension_enabled(EXT_ZCA));
  proc->set_extension_enable(EXT_ZCMT, proc->extension_enabled(EXT_ZCA));
+  proc->set_extension_enable(EXT_ZFH, new_misa & (1L << ('F' - 'A')));
+  proc->set_extension_enable(EXT_ZFHMIN, new_misa & (1L << ('F' - 'A')));

  // update the hypervisor-only bits in MEDELEG and other CSRs
  if (!new_h && prev_h) {