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Diffstat (limited to 'stdlib/tst-strtod-round.c')
-rw-r--r--stdlib/tst-strtod-round.c133
1 files changed, 104 insertions, 29 deletions
diff --git a/stdlib/tst-strtod-round.c b/stdlib/tst-strtod-round.c
index c6ad126873..76385a94d3 100644
--- a/stdlib/tst-strtod-round.c
+++ b/stdlib/tst-strtod-round.c
@@ -17,6 +17,7 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
+#include <fenv.h>
#include <float.h>
#include <math.h>
#include <stdbool.h>
@@ -24,21 +25,32 @@
#include <stdlib.h>
#include <string.h>
-struct test {
- const char *s;
+struct test_results {
float f;
double d;
- bool ld_ok;
long double ld;
};
+struct test {
+ const char *s;
+ bool ld_ok;
+ struct test_results rd, rn, rz, ru;
+};
+
#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
# define TEST(s, fd, fn, fz, fu, dd, dn, dz, du, ld53d, ld53n, ld53z, ld53u, \
ld64id, ld64in, ld64iz, ld64iu, \
ld64md, ld64mn, ld64mz, ld64mu, \
ld106exact, ld106d, ld106n, ld106z, ld106u, \
ld113d, ld113n, ld113z, ld113u) \
- { s, fn, dn, true, ld53n }
+ { \
+ s, \
+ true, \
+ { fd, dd, ld53d }, \
+ { fn, dn, ld53n }, \
+ { fz, dz, ld53z }, \
+ { fu, du, ld53u } \
+ }
#elif LDBL_MANT_DIG == 64 && LDBL_MAX_EXP == 16384 && LDBL_MIN_EXP == -16381
/* This is for the Intel extended float format. */
# define TEST(s, fd, fn, fz, fu, dd, dn, dz, du, ld53d, ld53n, ld53z, ld53u, \
@@ -46,7 +58,14 @@ struct test {
ld64md, ld64mn, ld64mz, ld64mu, \
ld106exact, ld106d, ld106n, ld106z, ld106u, \
ld113d, ld113n, ld113z, ld113u) \
- { s, fn, dn, true, ld64in }
+ { \
+ s, \
+ true, \
+ { fd, dd, ld64id }, \
+ { fn, dn, ld64in }, \
+ { fz, dz, ld64iz }, \
+ { fu, du, ld64iu } \
+ }
#elif LDBL_MANT_DIG == 64 && LDBL_MAX_EXP == 16384 && LDBL_MIN_EXP == -16382
/* This is for the Motorola extended float format. */
# define TEST(s, fd, fn, fz, fu, dd, dn, dz, du, ld53d, ld53n, ld53z, ld53u, \
@@ -54,21 +73,42 @@ struct test {
ld64md, ld64mn, ld64mz, ld64mu, \
ld106exact, ld106d, ld106n, ld106z, ld106u, \
ld113d, ld113n, ld113z, ld113u) \
- { s, fn, dn, true, ld64mn }
+ { \
+ s, \
+ true, \
+ { fd, dd, ld64md }, \
+ { fn, dn, ld64mn }, \
+ { fz, dz, ld64mz }, \
+ { fu, du, ld64mu } \
+ }
#elif LDBL_MANT_DIG == 106 && LDBL_MAX_EXP == 1024
# define TEST(s, fd, fn, fz, fu, dd, dn, dz, du, ld53d, ld53n, ld53z, ld53u, \
ld64id, ld64in, ld64iz, ld64iu, \
ld64md, ld64mn, ld64mz, ld64mu, \
ld106exact, ld106d, ld106n, ld106z, ld106u, \
ld113d, ld113n, ld113z, ld113u) \
- { s, fn, dn, ld106exact, ld106n }
+ { \
+ s, \
+ ld106exact, \
+ { fd, dd, ld106d }, \
+ { fn, dn, ld106n }, \
+ { fz, dz, ld106z }, \
+ { fu, du, ld106u } \
+ }
#elif LDBL_MANT_DIG == 113 && LDBL_MAX_EXP == 16384
# define TEST(s, fd, fn, fz, fu, dd, dn, dz, du, ld53d, ld53n, ld53z, ld53u, \
ld64id, ld64in, ld64iz, ld64iu, \
ld64md, ld64mn, ld64mz, ld64mu, \
ld106exact, ld106d, ld106n, ld106z, ld106u, \
ld113d, ld113n, ld113z, ld113u) \
- { s, fn, dn, true, ld113n }
+ { \
+ s, \
+ true, \
+ { fd, dd, ld113d }, \
+ { fn, dn, ld113n }, \
+ { fz, dz, ld113z }, \
+ { fu, du, ld113u } \
+ }
#else
# error "unknown long double format"
#endif
@@ -6819,38 +6859,73 @@ static const struct test tests[] = {
};
static int
+test_in_one_mode (const char *s, const struct test_results *expected,
+ bool ld_ok, const char *mode_name)
+{
+ int result = 0;
+ float f = strtof (s, NULL);
+ double d = strtod (s, NULL);
+ long double ld = strtold (s, NULL);
+ if (f != expected->f
+ || copysignf (1.0f, f) != copysignf (1.0f, expected->f))
+ {
+ printf ("strtof (%s) returned %a not %a (%s)\n", s, f,
+ expected->f, mode_name);
+ result = 1;
+ }
+ if (d != expected->d
+ || copysign (1.0, d) != copysign (1.0, expected->d))
+ {
+ printf ("strtod (%s) returned %a not %a (%s)\n", s, d,
+ expected->d, mode_name);
+ result = 1;
+ }
+ if (ld != expected->ld
+ || copysignl (1.0L, ld) != copysignl (1.0L, expected->ld))
+ {
+ printf ("strtold (%s) returned %La not %La (%s)\n", s, ld,
+ expected->ld, mode_name);
+ if (ld_ok)
+ result = 1;
+ else
+ printf ("ignoring this inexact long double result\n");
+ }
+ return result;
+}
+
+static int
do_test (void)
{
+ int save_round_mode = fegetround ();
int result = 0;
for (size_t i = 0; i < sizeof (tests) / sizeof (tests[0]); i++)
{
- float f = strtof (tests[i].s, NULL);
- double d = strtod (tests[i].s, NULL);
- long double ld = strtold (tests[i].s, NULL);
- if (f != tests[i].f
- || copysignf (1.0f, f) != copysignf (1.0f, tests[i].f))
+ result |= test_in_one_mode (tests[i].s, &tests[i].rn, tests[i].ld_ok,
+ "default rounding mode");
+#ifdef FE_DOWNWARD
+ if (!fesetround (FE_DOWNWARD))
{
- printf ("strtof (%s) returned %a not %a\n", tests[i].s, f,
- tests[i].f);
- result = 1;
+ result |= test_in_one_mode (tests[i].s, &tests[i].rd, tests[i].ld_ok,
+ "FE_DOWNWARD");
+ fesetround (save_round_mode);
}
- if (d != tests[i].d
- || copysign (1.0, d) != copysign (1.0, tests[i].d))
+#endif
+#ifdef FE_TOWARDZERO
+ if (!fesetround (FE_TOWARDZERO))
{
- printf ("strtod (%s) returned %a not %a\n", tests[i].s, d,
- tests[i].d);
- result = 1;
+ result |= test_in_one_mode (tests[i].s, &tests[i].rz, tests[i].ld_ok,
+ "FE_TOWARDZERO");
+ fesetround (save_round_mode);
}
- if (ld != tests[i].ld
- || copysignl (1.0L, ld) != copysignl (1.0L, tests[i].ld))
+#endif
+#ifdef FE_UPWARD
+ if (!fesetround (FE_UPWARD))
{
- printf ("strtold (%s) returned %La not %La\n", tests[i].s, ld,
- tests[i].ld);
- if (tests[i].ld_ok)
- result = 1;
- else
- printf ("ignoring this inexact long double result\n");
+ result |= test_in_one_mode (tests[i].s, &tests[i].ru, tests[i].ld_ok,
+ "FE_UPWARD");
+ fesetround (save_round_mode);
}
+#endif
}
return result;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-17 21:28:22 +0000