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| author | Joseph Myers <joseph@codesourcery.com> | 2012-09-06 15:33:06 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2012-09-06 15:33:06 +0000 |
| commit | ed8c2ecd21d07e9e116fc494742a2b3af8193144 (patch) | |
| tree | 40c9b36f55c6a5e2350a77c4f6437ee4a14b90c5 /stdlib/gen-tst-strtod-round.c | |
| parent | 053406fa70d071423c43465d60042d84c24f94cf (diff) | |
| download | glibc-ed8c2ecd21d07e9e116fc494742a2b3af8193144.tar.gz glibc-ed8c2ecd21d07e9e116fc494742a2b3af8193144.tar.xz glibc-ed8c2ecd21d07e9e116fc494742a2b3af8193144.zip | |
Fix strtod test for values above maximum for IBM long double.
Diffstat (limited to 'stdlib/gen-tst-strtod-round.c')
| -rw-r--r-- | stdlib/gen-tst-strtod-round.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/stdlib/gen-tst-strtod-round.c b/stdlib/gen-tst-strtod-round.c index f4ad270152..56aafab02e 100644 --- a/stdlib/gen-tst-strtod-round.c +++ b/stdlib/gen-tst-strtod-round.c @@ -18,6 +18,7 @@ <http://www.gnu.org/licenses/>. */ #define _GNU_SOURCE +#include <assert.h> #include <stdbool.h> #include <stdio.h> #include <stdlib.h> @@ -65,7 +66,19 @@ round_str (const char *s, const char *suffix, mpfr_init (f); int r = string_to_fp (f, s, MPFR_RNDD); if (need_exact) - mpfr_printf ("\t%s,\n", r ? "false" : "true"); + { + assert (prec == 106 && emin == -1073 && emax == 1024); + /* The maximum value in IBM long double has discontiguous + mantissa bits. */ + mpfr_t max_value; + mpfr_init2 (max_value, 107); + mpfr_set_str (max_value, "0x1.fffffffffffff7ffffffffffffcp+1023", 0, + MPFR_RNDN); + if (mpfr_cmpabs (f, max_value) > 0) + r = 1; + mpfr_printf ("\t%s,\n", r ? "false" : "true"); + mpfr_clear (max_value); + } print_fp (f, suffix, ",\n"); string_to_fp (f, s, MPFR_RNDN); print_fp (f, suffix, ",\n"); |