diff options
| author | Joseph Myers <joseph@codesourcery.com> | 2016-10-28 21:15:26 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2016-10-28 21:16:58 +0000 |
| commit | f82a4bdb73328bc53bdcc344622acbd96522a83c (patch) | |
| tree | 4e5eddb2c0335ee5655a2014949e6e6f1f7d9b45 /math | |
| parent | 739e14f9009ff91e4a8d01776e7269fc8cbd0293 (diff) | |
| download | glibc-f82a4bdb73328bc53bdcc344622acbd96522a83c.tar glibc-f82a4bdb73328bc53bdcc344622acbd96522a83c.tar.gz glibc-f82a4bdb73328bc53bdcc344622acbd96522a83c.tar.bz2 glibc-f82a4bdb73328bc53bdcc344622acbd96522a83c.zip | |
Add SNAN, SNANF, SNANL macros.
TS 18661-1 defines SNAN macros for signaling NaN values, suitable for
use in static initializers. This patch adds them to glibc's <math.h>
(provided you are building with GCC 3.3 or later; no attempt is made
to provide any kind of nonconforming fallback for older compilers
without the __builtin_nans functions).
Tested for x86_64 and x86.
* math/math.h
[__GLIBC_USE (IEC_60559_BFP_EXT) && __GNUC_PREREQ (3, 3)] (SNANF):
New macro.
[__GLIBC_USE (IEC_60559_BFP_EXT) && __GNUC_PREREQ (3, 3)] (SNAN):
Likewise.
[__GLIBC_USE (IEC_60559_BFP_EXT) && __GNUC_PREREQ (3, 3)] (SNANL):
Likewise.
* manual/arith.texi (Infinity and NaN): Document SNANF, SNAN and
SNANL.
* math/test-double.h (snan_value_MACRO): New macro.
* math/test-float.h (snan_value_MACRO): Likewise.
* math/test-ldouble.h (snan_value_MACRO): Likewise.
* math/libm-test.inc (issignaling_test_data): Add tests of
snan_value_MACRO.
Diffstat (limited to 'math')
| -rw-r--r-- | math/libm-test.inc | 2 | ||||
| -rw-r--r-- | math/math.h | 9 | ||||
| -rw-r--r-- | math/test-double.h | 1 | ||||
| -rw-r--r-- | math/test-float.h | 1 | ||||
| -rw-r--r-- | math/test-ldouble.h | 1 |
5 files changed, 14 insertions, 0 deletions
diff --git a/math/libm-test.inc b/math/libm-test.inc index 710633842c..88420ee613 100644 --- a/math/libm-test.inc +++ b/math/libm-test.inc @@ -8901,6 +8901,8 @@ static const struct test_f_i_data issignaling_test_data[] = TEST_f_b (issignaling, -qnan_value, 0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED), TEST_f_b (issignaling, snan_value, 1, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED), TEST_f_b (issignaling, -snan_value, 1, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED), + TEST_f_b (issignaling, snan_value_MACRO, 1, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED), + TEST_f_b (issignaling, -snan_value_MACRO, 1, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED), }; static void diff --git a/math/math.h b/math/math.h index 7c0c709523..70d9b864e8 100644 --- a/math/math.h +++ b/math/math.h @@ -45,6 +45,15 @@ __BEGIN_DECLS # include <bits/nan.h> #endif /* __USE_ISOC99 */ +#if __GLIBC_USE (IEC_60559_BFP_EXT) +/* Signaling NaN macros, if supported. */ +# if __GNUC_PREREQ (3, 3) +# define SNANF (__builtin_nansf ("")) +# define SNAN (__builtin_nans ("")) +# define SNANL (__builtin_nansl ("")) +# endif +#endif + /* Get the architecture specific values describing the floating-point evaluation. The following symbols will get defined: diff --git a/math/test-double.h b/math/test-double.h index b9e8cd840c..e172b8fb4d 100644 --- a/math/test-double.h +++ b/math/test-double.h @@ -27,3 +27,4 @@ #define TYPE_STR "double" #define LITM(x) x #define FTOSTR snprintf +#define snan_value_MACRO SNAN diff --git a/math/test-float.h b/math/test-float.h index e783c094c9..ea096c8aaa 100644 --- a/math/test-float.h +++ b/math/test-float.h @@ -28,3 +28,4 @@ /* Use the double variants of macro constants. */ #define LITM(x) x #define FTOSTR snprintf +#define snan_value_MACRO SNANF diff --git a/math/test-ldouble.h b/math/test-ldouble.h index b877711758..62c9eb8859 100644 --- a/math/test-ldouble.h +++ b/math/test-ldouble.h @@ -27,3 +27,4 @@ #define LIT(x) (x ## L) #define LITM(x) x ## l #define FTOSTR snprintf +#define snan_value_MACRO SNANL |