Implement cycleh/instreth CSRs for RV32

8 years ago · 74554e7d84
1 changed files with 5 additions and 0 deletions
--- a/riscv/processor.cc
+++ b/riscv/processor.cc
@ -565,6 +565,11 @@ reg_t processor_t::get_csr(int which)
    case CSR_MINSTRET:
    case CSR_MCYCLE:
      return state.minstret;
+    case CSR_INSTRETH:
+    case CSR_CYCLEH:
+      if (ctr_ok && xlen == 32)
+        return state.minstret >> 32;
+      break;
    case CSR_MINSTRETH:
    case CSR_MCYCLEH:
      if (xlen == 32)