diff options
| -rw-r--r-- | target/s390x/fpu_helper.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/target/s390x/fpu_helper.c b/target/s390x/fpu_helper.c index e258f20aa9..1be68bafea 100644 --- a/target/s390x/fpu_helper.c +++ b/target/s390x/fpu_helper.c @@ -397,14 +397,21 @@ uint32_t HELPER(cxb)(CPUS390XState *env, uint64_t ah, uint64_t al, int s390_swap_bfp_rounding_mode(CPUS390XState *env, int m3) { int ret = env->fpu_status.float_rounding_mode; + switch (m3) { case 0: /* current mode */ break; case 1: - /* biased round no nearest */ + /* round to nearest with ties away from 0 */ + set_float_rounding_mode(float_round_ties_away, &env->fpu_status); + break; + case 3: + /* round to prepare for shorter precision */ + set_float_rounding_mode(float_round_to_odd, &env->fpu_status); + break; case 4: - /* round to nearest */ + /* round to nearest with ties to even */ set_float_rounding_mode(float_round_nearest_even, &env->fpu_status); break; case 5: @@ -419,6 +426,8 @@ int s390_swap_bfp_rounding_mode(CPUS390XState *env, int m3) /* round to -inf */ set_float_rounding_mode(float_round_down, &env->fpu_status); break; + default: + g_assert_not_reached(); } return ret; } |