diff options
Diffstat (limited to 'target-cris/op_helper.c')
| -rw-r--r-- | target-cris/op_helper.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/target-cris/op_helper.c b/target-cris/op_helper.c index f5c0ed1..0e7d3c3 100644 --- a/target-cris/op_helper.c +++ b/target-cris/op_helper.c @@ -220,6 +220,25 @@ void helper_rfe(void) env->pregs[PR_CCS] |= P_FLAG; } +void helper_rfn(void) +{ + int rflag = env->pregs[PR_CCS] & R_FLAG; + + D(fprintf(logfile, "rfn: erp=%x pid=%x ccs=%x btarget=%x\n", + env->pregs[PR_ERP], env->pregs[PR_PID], + env->pregs[PR_CCS], + env->btarget)); + + cris_ccs_rshift(env); + + /* Set the P_FLAG only if the R_FLAG is not set. */ + if (!rflag) + env->pregs[PR_CCS] |= P_FLAG; + + /* Always set the M flag. */ + env->pregs[PR_CCS] |= M_FLAG; +} + void helper_store(uint32_t a0) { if (env->pregs[PR_CCS] & P_FLAG ) |