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| author | Paul Eggert <eggert@cs.ucla.edu> | 2020-03-18 14:48:52 -0700 |
|---|---|---|
| committer | Paul Eggert <eggert@cs.ucla.edu> | 2020-03-19 00:11:15 -0700 |
| commit | efb5115ba29d75e1227e36da3d92dc2f5c5b6257 (patch) | |
| tree | 3fe22875d08ff20630cdfea35c7018f9eccccd84 /src/timefns.c | |
| parent | 64d9b4cd762cd39749b899343cb4878e5998a170 (diff) | |
Omit timestamp optimization invalid on 387 FPU
* src/timefns.c (frac_to_double): Omit optimization that is
invalid on machines with excess precision (e.g., gcc x86 with 387
FPU), because it double-rounds. Found via ‘gcc -m32’ on x86-64.
Diffstat (limited to 'src/timefns.c')
| -rw-r--r-- | src/timefns.c | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/src/timefns.c b/src/timefns.c index 404ce4973b7..a9595b5d239 100644 --- a/src/timefns.c +++ b/src/timefns.c @@ -611,9 +611,6 @@ frac_to_double (Lisp_Object numerator, Lisp_Object denominator) ptrdiff_t ndig = mpz_sizeinbase (*n, FLT_RADIX); ptrdiff_t ddig = mpz_sizeinbase (*d, FLT_RADIX); - if (FASTER_TIMEFNS && ndig <= DBL_MANT_DIG && ddig <= DBL_MANT_DIG) - return mpz_get_d (*n) / mpz_get_d (*d); - /* Scale with SCALE when doing integer division. That is, compute (N * FLT_RADIX**SCALE) / D [or, if SCALE is negative, N / (D * FLT_RADIX**-SCALE)] as a bignum, convert the bignum to double, |