diff options
| -rw-r--r-- | ChangeLog | 17 | ||||
| -rw-r--r-- | NEWS | 2 | ||||
| -rw-r--r-- | manual/arith.texi | 9 | ||||
| -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 |
8 files changed, 42 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog index d5b3f7bb7e..eed5cc5f37 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,20 @@ +2016-10-28 Joseph Myers <joseph@codesourcery.com> + + * 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. + 2016-10-28 Tulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com> * nptl/pthread_rwlock_unlock.c: Add a comment explaining its diff --git a/NEWS b/NEWS index 2da72cdf7a..65184b11da 100644 --- a/NEWS +++ b/NEWS @@ -51,6 +51,8 @@ Version 2.25 * New <math.h> features are added from TS 18661-1:2014: + - Signaling NaN macros: SNANF, SNAN, SNANL. + - Comparison macros: iseqsig. - Classification macros: iscanonical, issubnormal, iszero. diff --git a/manual/arith.texi b/manual/arith.texi index a5c04e475f..f0f3bb4031 100644 --- a/manual/arith.texi +++ b/manual/arith.texi @@ -711,6 +711,15 @@ such as by defining @code{_GNU_SOURCE}, and then you must include @file{math.h}.) @end deftypevr +@comment math.h +@comment ISO +@deftypevr Macro float SNANF +@deftypevrx Macro double SNAN +@deftypevrx Macro {long double} SNANL +These macros, defined by TS 18661-1:2014, are constant expressions for +signaling NaNs. +@end deftypevr + @w{IEEE 754} also allows for another unusual value: negative zero. This value is produced when you divide a positive number by negative infinity, or when a negative result is smaller than the limits of 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 |