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a8e2112ae3
Some existing jn tests, if run in non-default rounding modes, produce errors above those accepted in glibc, which causes problems for moving tests of jn to use ALL_RM_TEST. This patch makes jn set rounding to-nearest internally, as was done for yn some time ago, then computes the appropriate underflowing value for results that underflowed to zero in to-nearest, and moves the tests to ALL_RM_TEST. It does nothing about the general inaccuracy of Bessel function implementations in glibc, though it should make jn more accurate on average in non-default rounding modes through reduced error accumulation. The recomputation of results that underflowed to zero should as a side-effect fix some cases of bug 16559, where jn just used an exact zero, but that is *not* the goal of this patch and other cases of that bug remain unfixed. (Most of the changes in the patch are reindentation to add new scopes for SET_RESTORE_ROUND*.) Tested for x86_64, x86, powerpc and mips64. [BZ #16559] [BZ #18602] * sysdeps/ieee754/dbl-64/e_jn.c (__ieee754_jn): Set round-to-nearest internally then recompute results that underflowed to zero in the original rounding mode. * sysdeps/ieee754/flt-32/e_jnf.c (__ieee754_jnf): Likewise. * sysdeps/ieee754/ldbl-128/e_jnl.c (__ieee754_jnl): Likewise. * sysdeps/ieee754/ldbl-128ibm/e_jnl.c (__ieee754_jnl): Likewise. * sysdeps/ieee754/ldbl-96/e_jnl.c (__ieee754_jnl): Likewise * math/libm-test.inc (jn_test): Use ALL_RM_TEST. * sysdeps/i386/fpu/libm-test-ulps: Update. * sysdeps/x86_64/fpu/libm-test-ulps: Likewise. |
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| .. | ||
| e_acosf.c | ||
| e_acoshf.c | ||
| e_asinf.c | ||
| e_atan2f.c | ||
| e_atanhf.c | ||
| e_coshf.c | ||
| e_exp2f.c | ||
| e_expf.c | ||
| e_fmodf.c | ||
| e_gammaf_r.c | ||
| e_hypotf.c | ||
| e_ilogbf.c | ||
| e_j0f.c | ||
| e_j1f.c | ||
| e_jnf.c | ||
| e_lgammaf_r.c | ||
| e_log2f.c | ||
| e_log10f.c | ||
| e_logf.c | ||
| e_powf.c | ||
| e_rem_pio2f.c | ||
| e_remainderf.c | ||
| e_sinhf.c | ||
| e_sqrtf.c | ||
| k_cosf.c | ||
| k_rem_pio2f.c | ||
| k_sinf.c | ||
| k_tanf.c | ||
| math_private.h | ||
| mpn2flt.c | ||
| s_asinhf.c | ||
| s_atanf.c | ||
| s_cbrtf.c | ||
| s_ceilf.c | ||
| s_copysignf.c | ||
| s_cosf.c | ||
| s_erff.c | ||
| s_expm1f.c | ||
| s_fabsf.c | ||
| s_finitef.c | ||
| s_floorf.c | ||
| s_fpclassifyf.c | ||
| s_frexpf.c | ||
| s_isinf_nsf.c | ||
| s_isinff.c | ||
| s_isnanf.c | ||
| s_issignalingf.c | ||
| s_llrintf.c | ||
| s_llroundf.c | ||
| s_log1pf.c | ||
| s_logbf.c | ||
| s_lrintf.c | ||
| s_lroundf.c | ||
| s_modff.c | ||
| s_nearbyintf.c | ||
| s_nextafterf.c | ||
| s_remquof.c | ||
| s_rintf.c | ||
| s_roundf.c | ||
| s_scalblnf.c | ||
| s_scalbnf.c | ||
| s_signbitf.c | ||
| s_sincosf.c | ||
| s_sinf.c | ||
| s_tanf.c | ||
| s_tanhf.c | ||
| s_truncf.c | ||
| t_exp2f.h | ||
| w_expf.c | ||