diff options
| -rw-r--r-- | target-arm/helper.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/target-arm/helper.c b/target-arm/helper.c index a9b092746c..67dc212603 100644 --- a/target-arm/helper.c +++ b/target-arm/helper.c @@ -3994,18 +3994,27 @@ float##fsz HELPER(vfp_##name##to##p)(uint##isz##_t x, uint32_t shift, \ return float##fsz##_scalbn(tmp, -(int)shift, fpst); \ } +/* Notice that we want only input-denormal exception flags from the + * scalbn operation: the other possible flags (overflow+inexact if + * we overflow to infinity, output-denormal) aren't correct for the + * complete scale-and-convert operation. + */ #define VFP_CONV_FLOAT_FIX_ROUND(name, p, fsz, isz, itype, round) \ uint##isz##_t HELPER(vfp_to##name##p##round)(float##fsz x, \ uint32_t shift, \ void *fpstp) \ { \ float_status *fpst = fpstp; \ + int old_exc_flags = get_float_exception_flags(fpst); \ float##fsz tmp; \ if (float##fsz##_is_any_nan(x)) { \ float_raise(float_flag_invalid, fpst); \ return 0; \ } \ tmp = float##fsz##_scalbn(x, shift, fpst); \ + old_exc_flags |= get_float_exception_flags(fpst) \ + & float_flag_input_denormal; \ + set_float_exception_flags(old_exc_flags, fpst); \ return float##fsz##_to_##itype##round(tmp, fpst); \ } |