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| author | Joseph Myers <joseph@codesourcery.com> | 2013-03-21 13:57:21 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2013-03-21 13:57:21 +0000 |
| commit | 98c48fe5cc4317123a168490a8fb37540e23f104 (patch) | |
| tree | bef07c691890f1a2f0a339df2722c64a1b7c08a1 /sysdeps | |
| parent | 3775a8bc2d2e0c29c8a7e673f5f42537ced2b3c7 (diff) | |
| download | glibc-98c48fe5cc4317123a168490a8fb37540e23f104.tar.gz glibc-98c48fe5cc4317123a168490a8fb37540e23f104.tar.xz glibc-98c48fe5cc4317123a168490a8fb37540e23f104.zip | |
Fix Bessel function spurious overflows for ldbl-128 / ldbl-128ibm (bug 15285).
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/i386/fpu/libm-test-ulps | 6 | ||||
| -rw-r--r-- | sysdeps/ieee754/ldbl-128/e_j0l.c | 27 | ||||
| -rw-r--r-- | sysdeps/ieee754/ldbl-128/e_j1l.c | 27 |
3 files changed, 40 insertions, 20 deletions
diff --git a/sysdeps/i386/fpu/libm-test-ulps b/sysdeps/i386/fpu/libm-test-ulps index 560e27c936..27b96ce5f1 100644 --- a/sysdeps/i386/fpu/libm-test-ulps +++ b/sysdeps/i386/fpu/libm-test-ulps @@ -3153,6 +3153,9 @@ ldouble: 2 Test "j0 (0x1.d7ce3ap+107) == 2.775523647291230802651040996274861694514e-17": float: 1 ifloat: 1 +Test "j0 (0x1p1023) == -1.5665258060609012834424478437196679802783e-155": +double: 1 +idouble: 1 Test "j0 (0x1p16382) == -1.2193782500509000574176799046642541129387e-2466": ildouble: 1 ldouble: 1 @@ -4016,6 +4019,9 @@ ldouble: 1 Test "y1 (0x1p-10) == -6.5190099301063115047395187618929589514382e+02": float: 1 ifloat: 1 +Test "y1 (0x1p1023) == 1.5665258060609012834424478437196679802783e-155": +double: 1 +idouble: 1 Test "y1 (0x1p16382) == 1.2193782500509000574176799046642541129387e-2466": ildouble: 1 ldouble: 1 diff --git a/sysdeps/ieee754/ldbl-128/e_j0l.c b/sysdeps/ieee754/ldbl-128/e_j0l.c index 9e7880c49d..108eff4435 100644 --- a/sysdeps/ieee754/ldbl-128/e_j0l.c +++ b/sysdeps/ieee754/ldbl-128/e_j0l.c @@ -93,6 +93,7 @@ #include <math.h> #include <math_private.h> +#include <float.h> /* 1 / sqrt(pi) */ static const long double ONEOSQPI = 5.6418958354775628694807945156077258584405E-1L; @@ -710,11 +711,14 @@ __ieee754_j0l (long double x) __sincosl (xx, &s, &c); ss = s - c; cc = s + c; - z = -__cosl (xx + xx); - if ((s * c) < 0) - cc = z / ss; - else - ss = z / cc; + if (xx <= LDBL_MAX / 2.0L) + { + z = -__cosl (xx + xx); + if ((s * c) < 0) + cc = z / ss; + else + ss = z / cc; + } if (xx > 0x1p256L) return ONEOSQPI * cc / __ieee754_sqrtl (xx); @@ -857,11 +861,14 @@ long double __sincosl (x, &s, &c); ss = s - c; cc = s + c; - z = -__cosl (x + x); - if ((s * c) < 0) - cc = z / ss; - else - ss = z / cc; + if (xx <= LDBL_MAX / 2.0L) + { + z = -__cosl (x + x); + if ((s * c) < 0) + cc = z / ss; + else + ss = z / cc; + } if (xx > 0x1p256L) return ONEOSQPI * ss / __ieee754_sqrtl (x); diff --git a/sysdeps/ieee754/ldbl-128/e_j1l.c b/sysdeps/ieee754/ldbl-128/e_j1l.c index 95e01a39cc..70a1c86fd2 100644 --- a/sysdeps/ieee754/ldbl-128/e_j1l.c +++ b/sysdeps/ieee754/ldbl-128/e_j1l.c @@ -97,6 +97,7 @@ #include <math.h> #include <math_private.h> +#include <float.h> /* 1 / sqrt(pi) */ static const long double ONEOSQPI = 5.6418958354775628694807945156077258584405E-1L; @@ -715,11 +716,14 @@ __ieee754_j1l (long double x) __sincosl (xx, &s, &c); ss = -s - c; cc = s - c; - z = __cosl (xx + xx); - if ((s * c) > 0) - cc = z / ss; - else - ss = z / cc; + if (xx <= LDBL_MAX / 2.0L) + { + z = __cosl (xx + xx); + if ((s * c) > 0) + cc = z / ss; + else + ss = z / cc; + } if (xx > 0x1p256L) { @@ -868,11 +872,14 @@ __ieee754_y1l (long double x) __sincosl (xx, &s, &c); ss = -s - c; cc = s - c; - z = __cosl (xx + xx); - if ((s * c) > 0) - cc = z / ss; - else - ss = z / cc; + if (xx <= LDBL_MAX / 2.0L) + { + z = __cosl (xx + xx); + if ((s * c) > 0) + cc = z / ss; + else + ss = z / cc; + } if (xx > 0x1p256L) return ONEOSQPI * ss / __ieee754_sqrtl (xx); |