Fix comment typo. (#126)

[riscv-isa-sim.git] / riscv / insns / csrrsi.h

diff --git a/riscv/insns/csrrsi.h b/riscv/insns/csrrsi.h
index 094e91a855869fafdf241a6aba6a1d7be525e91d..aa44dcca8543ac374400450e4cc4326fc24652bc 100644 (file)
--- a/riscv/insns/csrrsi.h
+++ b/riscv/insns/csrrsi.h
@@ -1,4 +1,7 @@
-int csr = validate_csr(insn.csr(), true);
-reg_t old = p->get_pcr(csr);
-p->set_pcr(csr, old | insn.rs1());
-WRITE_RD(sext_xprlen(old));
+bool write = insn.rs1() != 0;
+int csr = validate_csr(insn.csr(), write);
+reg_t old = p->get_csr(csr);
+if (write) {
+  p->set_csr(csr, old | insn.rs1());
+}
+WRITE_RD(sext_xlen(old));