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BZ#13889: expl (709.75) wrongly overflows for ldbl-128ibm

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The patch increase the high value to check if expl overflows. Current
high mark value is not really correct, the algorithm accepts high values.
It also adds a correct wrapper function to check for overflow and underflow.
This commit is contained in:
Adhemerval Zanella
2013-03-22 12:39:10 -03:00
parent 2e0fb52187
commit e42a38dd9d
5 changed files with 40 additions and 10 deletions
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math/libm-test.inc
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@@ -4564,6 +4564,9 @@ exp_test (void)
TEST_f_f (exp, 0.75L, 2.11700001661267466854536981983709561L);
TEST_f_f (exp, 50.0L, 5184705528587072464087.45332293348538L);
TEST_f_f (exp, 88.72269439697265625L, 3.40233126623160774937554134772290447915e38L);
#ifndef TEST_FLOAT
TEST_f_f (exp, 709.75L, 1.739836873264160557698252711673830393864768e+308L);
#endif
#if defined TEST_LDOUBLE && __LDBL_MAX_EXP__ > 1024
/* The result can only be represented in sane long double. */
TEST_f_f (exp, 1000.0L, 0.197007111401704699388887935224332313e435L);