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-rw-r--r--ChangeLog9
-rw-r--r--NEWS4
-rw-r--r--manual/arith.texi8
-rwxr-xr-xmanual/libm-err-tab.pl6
-rw-r--r--math/libm-test.inc28
-rw-r--r--math/math.h3
6 files changed, 54 insertions, 4 deletions
diff --git a/ChangeLog b/ChangeLog
index fbc38bd..00162c3 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,14 @@
2016-09-21 Joseph Myers <joseph@codesourcery.com>
+ * math/math.h [__GLIBC_USE (IEC_60559_BFP_EXT)] (issubnormal): New
+ macro.
+ * math/libm-test.inc (issubnormal_test_data): New array.
+ (issubnormal_test): New function.
+ * manual/arith.texi (Floating Point Classes): Document
+ issubnormal.
+ * manual/libm-err-tab.pl: Update comment on interfaces without
+ ulps tabulated.
+
* sysdeps/generic/stdint.h: Define
__GLIBC_INTERNAL_STARTING_HEADER_IMPLEMENTATION and include
<bits/libc-header-start.h> instead of including <features.h>.
diff --git a/NEWS b/NEWS
index f59a27d..23ca5ab 100644
--- a/NEWS
+++ b/NEWS
@@ -49,6 +49,10 @@ Version 2.25
UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
WINT_WIDTH.
+* New <math.h> features are added from TS 18661-1:2014:
+
+ - Classification macros: issubnormal.
+
* The <sys/quota.h> header now includes the <linux/quota.h> header. Support
for the Linux quota interface which predates kernel version 2.4.22 has
been removed.
diff --git a/manual/arith.texi b/manual/arith.texi
index dc3c367..bfa236a 100644
--- a/manual/arith.texi
+++ b/manual/arith.texi
@@ -406,6 +406,14 @@ This macro returns a nonzero value if @var{x} is a signaling NaN
(sNaN). It is from TS 18661-1:2014.
@end deftypefn
+@comment math.h
+@comment ISO
+@deftypefn {Macro} int issubnormal (@emph{float-type} @var{x})
+@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}}
+This macro returns a nonzero value if @var{x} is subnormal. It is
+from TS 18661-1:2014.
+@end deftypefn
+
Another set of floating-point classification functions was provided by
BSD. @Theglibc{} also supports these functions; however, we
recommend that you use the ISO C99 macros in new code. Those are standard
diff --git a/manual/libm-err-tab.pl b/manual/libm-err-tab.pl
index c2792c5..adeadb8 100755
--- a/manual/libm-err-tab.pl
+++ b/manual/libm-err-tab.pl
@@ -77,9 +77,9 @@ use vars qw (%results @all_floats %suffices @all_functions);
"nextup", "pow", "remainder", "remquo", "rint", "round", "scalb",
"scalbn", "sin", "sincos", "sinh", "sqrt", "tan", "tanh", "tgamma",
"trunc", "y0", "y1", "yn" );
-# fpclassify, isnormal, isfinite, isinf, isnan, issignaling, signbit,
-# isgreater, isgreaterequal, isless, islessequal, islessgreater, isunordered
-# are not tabulated.
+# fpclassify, isnormal, isfinite, isinf, isnan, issignaling,
+# issubnormal, signbit, isgreater, isgreaterequal, isless,
+# islessequal, islessgreater, isunordered are not tabulated.
if ($#ARGV == 0) {
$sources = $ARGV[0];
diff --git a/math/libm-test.inc b/math/libm-test.inc
index e4fcb5a..385ec5c 100644
--- a/math/libm-test.inc
+++ b/math/libm-test.inc
@@ -46,7 +46,7 @@
cbrt, ceil, copysign, cos, cosh, drem, erf, erfc, exp, exp10, exp2, expm1,
fabs, fdim, finite, floor, fma, fmax, fmin, fmod, fpclassify,
frexp, gamma, hypot,
- ilogb, isfinite, isinf, isnan, isnormal, issignaling,
+ ilogb, isfinite, isinf, isnan, isnormal, issignaling, issubnormal,
isless, islessequal, isgreater, isgreaterequal, islessgreater, isunordered,
j0, j1, jn,
ldexp, lgamma, log, log10, log1p, log2, logb,
@@ -8587,6 +8587,31 @@ issignaling_test (void)
ALL_RM_TEST (issignaling, 1, issignaling_test_data, RUN_TEST_LOOP_f_b_tg, END);
}
+static const struct test_f_i_data issubnormal_test_data[] =
+ {
+ TEST_f_b (issubnormal, 0, 0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+ TEST_f_b (issubnormal, minus_zero, 0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+ TEST_f_b (issubnormal, 10, 0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+ TEST_f_b (issubnormal, min_subnorm_value, 1, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+ TEST_f_b (issubnormal, -min_subnorm_value, 1, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+ TEST_f_b (issubnormal, min_value, 0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+ TEST_f_b (issubnormal, -min_value, 0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+ TEST_f_b (issubnormal, max_value, 0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+ TEST_f_b (issubnormal, -max_value, 0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+ TEST_f_b (issubnormal, plus_infty, 0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+ TEST_f_b (issubnormal, minus_infty, 0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+ TEST_f_b (issubnormal, qnan_value, 0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+ TEST_f_b (issubnormal, -qnan_value, 0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+ TEST_f_b (issubnormal, snan_value, 0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+ TEST_f_b (issubnormal, -snan_value, 0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+ };
+
+static void
+issubnormal_test (void)
+{
+ ALL_RM_TEST (issubnormal, 1, issubnormal_test_data, RUN_TEST_LOOP_f_b_tg, END);
+}
+
static const struct test_ff_i_data isunordered_test_data[] =
{
TEST_ff_i (isunordered, minus_zero, minus_zero, 0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
@@ -12668,6 +12693,7 @@ main (int argc, char **argv)
isnan_test ();
isnormal_test ();
issignaling_test ();
+ issubnormal_test ();
signbit_test ();
/* Trigonometric functions: */
diff --git a/math/math.h b/math/math.h
index 2f77dee..064cc56 100644
--- a/math/math.h
+++ b/math/math.h
@@ -328,6 +328,9 @@ enum
: sizeof (x) == sizeof (double) \
? __issignaling (x) : __issignalingl (x))
# endif
+
+/* Return nonzero value if X is subnormal. */
+# define issubnormal(x) (fpclassify (x) == FP_SUBNORMAL)
#endif /* Use IEC_60559_BFP_EXT. */
#ifdef __USE_MISC