diff options
| -rw-r--r-- | ChangeLog | 9 | ||||
| -rw-r--r-- | math/Makefile | 3 | ||||
| -rw-r--r-- | math/bug-nextafter.c | 28 | ||||
| -rw-r--r-- | math/libm-test.inc | 5 | ||||
| -rw-r--r-- | sysdeps/generic/s_nextafter.c | 10 | ||||
| -rw-r--r-- | sysdeps/ieee754/flt-32/s_nextafterf.c | 10 |
6 files changed, 62 insertions, 3 deletions
@@ -1,3 +1,12 @@ +2003-12-06 Ulrich Drepper <drepper@redhat.com> + + * math/Makefile (tests): Add bug-nextafter. + * math/bug-nextafter.c: New file. + * sysdeps/generic/s_nextafter.c: Construct overflow value correctly. + * sysdeps/ieee754/flt-32/s_nextafterf.c: Likewise. + * math/libm-test.inc (nextafter_test): Add test for overflow after + +/-FLT_MAX etc. + 2003-12-04 Steven Munroe <sjmunroe@us.ibm.com> * sysdeps/powerpc/fpu/fgetexcptflg.c (__fegetexceptflag): Add masking diff --git a/math/Makefile b/math/Makefile index d04269d..b862405 100644 --- a/math/Makefile +++ b/math/Makefile @@ -87,7 +87,8 @@ distribute += $(filter-out $(generated),$(long-m-yes:=.c) $(long-c-yes:=.c)) # Rules for the test suite. tests = test-matherr test-fenv atest-exp atest-sincos atest-exp2 basic-test \ - test-misc test-fpucw tst-definitions test-tgmath test-tgmath-ret + test-misc test-fpucw tst-definitions test-tgmath test-tgmath-ret \ + bug-nextafter # We do the `long double' tests only if this data type is available and # distinct from `double'. test-longdouble-yes = test-ldouble test-ildoubl diff --git a/math/bug-nextafter.c b/math/bug-nextafter.c new file mode 100644 index 0000000..8aa849d --- /dev/null +++ b/math/bug-nextafter.c @@ -0,0 +1,28 @@ +#include <math.h> +#include <float.h> +#include <stdlib.h> +#include <stdio.h> + +int +main (void) +{ + int result = 0; + + float i = INFINITY; + float m = FLT_MAX; + if (nextafterf (m, i) != i) + { + puts ("nextafterf failed"); + ++result; + } + + double di = INFINITY; + double dm = DBL_MAX; + if (nextafter (dm, di) != di) + { + puts ("nextafter failed"); + ++result; + } + + return result; +} diff --git a/math/libm-test.inc b/math/libm-test.inc index 69752e0..38386c1 100644 --- a/math/libm-test.inc +++ b/math/libm-test.inc @@ -3437,6 +3437,11 @@ nextafter_test (void) TEST_ff_f (nextafter, 1.1L, nan_value, nan_value); TEST_ff_f (nextafter, nan_value, nan_value, nan_value); + FLOAT fltmax = CHOOSE (LDBL_MAX, DBL_MAX, FLT_MAX, + LDBL_MAX, DBL_MAX, FLT_MAX); + TEST_ff_f (nextafter, fltmax, plus_infty, plus_infty); + TEST_ff_f (nextafter, -fltmax, minus_infty, minus_infty); + #ifdef TEST_LDOUBLE // XXX Enable once gcc is fixed. //TEST_ff_f (nextafter, 0x0.00000040000000000000p-16385L, -0.1L, 0x0.0000003ffffffff00000p-16385L); diff --git a/sysdeps/generic/s_nextafter.c b/sysdeps/generic/s_nextafter.c index a016ab0..9290fc6 100644 --- a/sysdeps/generic/s_nextafter.c +++ b/sysdeps/generic/s_nextafter.c @@ -27,6 +27,7 @@ static char rcsid[] = "$NetBSD: s_nextafter.c,v 1.8 1995/05/10 20:47:58 jtc Exp #include "math.h" #include "math_private.h" +#include <float.h> #ifdef __STDC__ double __nextafter(double x, double y) @@ -70,7 +71,14 @@ static char rcsid[] = "$NetBSD: s_nextafter.c,v 1.8 1995/05/10 20:47:58 jtc Exp } } hy = hx&0x7ff00000; - if(hy>=0x7ff00000) return x+x; /* overflow */ + if(hy>=0x7ff00000) { +#if FLT_EVAL_METHOD == 0 || FLT_EVAL_METHOD == 1 + return x+x; /* overflow */ +#else + /* Note that y is either +Inf or -Inf. */ + return x+y; +#endif + } if(hy<0x00100000) { /* underflow */ y = x*x; if(y!=x) { /* raise underflow flag */ diff --git a/sysdeps/ieee754/flt-32/s_nextafterf.c b/sysdeps/ieee754/flt-32/s_nextafterf.c index 611742b..e144e56 100644 --- a/sysdeps/ieee754/flt-32/s_nextafterf.c +++ b/sysdeps/ieee754/flt-32/s_nextafterf.c @@ -19,6 +19,7 @@ static char rcsid[] = "$NetBSD: s_nextafterf.c,v 1.4 1995/05/10 20:48:01 jtc Exp #include "math.h" #include "math_private.h" +#include <float.h> #ifdef __STDC__ float __nextafterf(float x, float y) @@ -57,7 +58,14 @@ static char rcsid[] = "$NetBSD: s_nextafterf.c,v 1.4 1995/05/10 20:48:01 jtc Exp } } hy = hx&0x7f800000; - if(hy>=0x7f800000) return x+x; /* overflow */ + if(hy>=0x7f800000) { +#if FLT_EVAL_METHOD == 0 + return x+x; /* overflow */ +#else + /* Note that y is either +Inf or -Inf. */ + return x+y; +#endif + } if(hy<0x00800000) { /* underflow */ y = x*x; if(y!=x) { /* raise underflow flag */ |