@@ -82,6 +82,10 @@ static RISCVException fs(CPURISCVState *env, int csrno)
!riscv_cpu_cfg(env)->ext_zfinx) {
return RISCV_EXCP_ILLEGAL_INST;
}
+
+ if (!env->debugger && !riscv_cpu_fp_enabled(env)) {
+ return smstateen_acc_ok(env, 0, SMSTATEEN0_FCSR);
+ }
#endif
return RISCV_EXCP_NONE;
}
@@ -2100,6 +2104,9 @@ static RISCVException write_mstateen0(CPURISCVState *env, int csrno,
target_ulong new_val)
{
uint64_t wr_mask = SMSTATEEN_STATEEN | SMSTATEEN0_HSENVCFG;
+ if (!riscv_has_ext(env, RVF)) {
+ wr_mask |= SMSTATEEN0_FCSR;
+ }
return write_mstateen(env, csrno, wr_mask, new_val);
}
@@ -2173,6 +2180,10 @@ static RISCVException write_hstateen0(CPURISCVState *env, int csrno,
{
uint64_t wr_mask = SMSTATEEN_STATEEN | SMSTATEEN0_HSENVCFG;
+ if (!riscv_has_ext(env, RVF)) {
+ wr_mask |= SMSTATEEN0_FCSR;
+ }
+
return write_hstateen(env, csrno, wr_mask, new_val);
}
@@ -2259,6 +2270,10 @@ static RISCVException write_sstateen0(CPURISCVState *env, int csrno,
{
uint64_t wr_mask = SMSTATEEN_STATEEN | SMSTATEEN0_HSENVCFG;
+ if (!riscv_has_ext(env, RVF)) {
+ wr_mask |= SMSTATEEN0_FCSR;
+ }
+
return write_sstateen(env, csrno, wr_mask, new_val);
}