diff options
Diffstat (limited to 'soft-fp/op-common.h')
| -rw-r--r-- | soft-fp/op-common.h | 33 |
1 files changed, 28 insertions, 5 deletions
diff --git a/soft-fp/op-common.h b/soft-fp/op-common.h index 1f58b89478..ef11b527b7 100644 --- a/soft-fp/op-common.h +++ b/soft-fp/op-common.h @@ -1153,7 +1153,8 @@ do { \ if (_FP_FRACBITS_##dfs < _FP_FRACBITS_##sfs \ || (_FP_EXPMAX_##dfs - _FP_EXPBIAS_##dfs \ < _FP_EXPMAX_##sfs - _FP_EXPBIAS_##sfs) \ - || _FP_EXPBIAS_##dfs < _FP_EXPBIAS_##sfs + _FP_FRACBITS_##sfs - 1) \ + || (_FP_EXPBIAS_##dfs < _FP_EXPBIAS_##sfs + _FP_FRACBITS_##sfs - 1 \ + && _FP_EXPBIAS_##dfs != _FP_EXPBIAS_##sfs)) \ abort(); \ D##_s = S##_s; \ _FP_FRAC_COPY_##dwc##_##swc(D, S); \ @@ -1168,6 +1169,14 @@ do { \ { \ if (_FP_FRAC_ZEROP_##swc(S)) \ D##_e = 0; \ + else if (_FP_EXPBIAS_##dfs \ + < _FP_EXPBIAS_##sfs + _FP_FRACBITS_##sfs - 1) \ + { \ + FP_SET_EXCEPTION(FP_EX_DENORM); \ + _FP_FRAC_SLL_##dwc(D, (_FP_FRACBITS_##dfs \ + - _FP_FRACBITS_##sfs)); \ + D##_e = 0; \ + } \ else \ { \ int _lz; \ @@ -1199,7 +1208,8 @@ do { \ #define FP_TRUNC(dfs,sfs,dwc,swc,D,S) \ do { \ if (_FP_FRACBITS_##sfs < _FP_FRACBITS_##dfs \ - || _FP_EXPBIAS_##sfs < _FP_EXPBIAS_##dfs + _FP_FRACBITS_##dfs - 1) \ + || (_FP_EXPBIAS_##sfs < _FP_EXPBIAS_##dfs + _FP_FRACBITS_##dfs - 1 \ + && _FP_EXPBIAS_##sfs != _FP_EXPBIAS_##dfs)) \ abort(); \ D##_s = S##_s; \ if (_FP_EXP_NORMAL(sfs, swc, S)) \ @@ -1237,11 +1247,24 @@ do { \ if (S##_e == 0) \ { \ D##_e = 0; \ - _FP_FRAC_SET_##dwc(D, _FP_ZEROFRAC_##dwc); \ - if (!_FP_FRAC_ZEROP_##swc(S)) \ + if (_FP_FRAC_ZEROP_##swc(S)) \ + _FP_FRAC_SET_##dwc(D, _FP_ZEROFRAC_##dwc); \ + else \ { \ FP_SET_EXCEPTION(FP_EX_DENORM); \ - FP_SET_EXCEPTION(FP_EX_INEXACT); \ + if (_FP_EXPBIAS_##sfs \ + < _FP_EXPBIAS_##dfs + _FP_FRACBITS_##dfs - 1) \ + { \ + _FP_FRAC_SRS_##swc(S, (_FP_WFRACBITS_##sfs \ + - _FP_WFRACBITS_##dfs), \ + _FP_WFRACBITS_##sfs); \ + _FP_FRAC_COPY_##dwc##_##swc(D, S); \ + } \ + else \ + { \ + _FP_FRAC_SET_##dwc(D, _FP_ZEROFRAC_##dwc); \ + _FP_FRAC_LOW_##dwc(D) |= 1; \ + } \ } \ } \ else \ |