X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=riscv%2Finsns%2Fcsrrc.h;h=0472d80efd5164b885d99d94f7a58d8359a26037;hb=4299874ad4b07ef457776513a64e5b2397a6a75e;hp=8ca7c4173783806ed54e91389e658dc7216f93dd;hpb=e85cb99c5e042ebce78f64213677a48ee7ba0491;p=riscv-isa-sim.git

diff --git a/riscv/insns/csrrc.h b/riscv/insns/csrrc.h
index 8ca7c41..0472d80 100644
--- a/riscv/insns/csrrc.h
+++ b/riscv/insns/csrrc.h
@@ -1,2 +1,8 @@
-int csr = validate_csr(insn.csr(), true);
-WRITE_RD(p->set_pcr(csr, p->get_pcr(csr) & ~RS1));
+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 & ~RS1);
+}
+WRITE_RD(sext_xlen(old));
+serialize();