From 51b34a9c47e4228873788ad66699c328e27a3295 Mon Sep 17 00:00:00 2001 From: Tulio Magno Quites Machado Filho Date: Fri, 17 Feb 2017 09:07:57 -0200 Subject: Fix lgamma*, log10* and log2* results [BZ #21171] lgamma(-x) should return +Inf and raise divide-by-zero. log10(+-0) and log2(+-0) should return -Inf and raise divide-by-zero. Tested on powerpc, powerpc64, powerpc64le and x86_64. [BZ #21171] * sysdeps/ieee754/dbl-64/e_lgamma_r.c (__ieee754_lgamma_r): Return +Inf and raise divide-by-zero when x is negative. * sysdeps/ieee754/flt-32/e_lgammaf_r.c (__ieee754_lgammaf_r): Likewise. * sysdeps/ieee754/ldbl-128/e_lgammal_r.c (__ieee754_lgammal_r): Likewise. * sysdeps/ieee754/dbl-64/e_log10.c (__ieee754_log10): Return -Inf and raise divide-by-zero when x = +-0. * sysdeps/ieee754/dbl-64/e_log2.c (__ieee754_log2): Likewise. * sysdeps/ieee754/flt-32/e_log10f.c (__ieee754_log10f): Likewise. * sysdeps/ieee754/flt-32/e_log2f.c (__ieee754_log2f): Likewise. * sysdeps/ieee754/ldbl-128/e_log10l.c (__ieee754_log10l): Likewise. * sysdeps/ieee754/ldbl-128/e_log2l.c (__ieee754_log2l): Likewise. * sysdeps/ieee754/ldbl-128ibm/e_log10l.c (__ieee754_log10l): Likewise. * sysdeps/ieee754/ldbl-128ibm/e_log2l.c (__ieee754_log2l): Likewise. --- sysdeps/ieee754/flt-32/e_lgammaf_r.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'sysdeps/ieee754/flt-32/e_lgammaf_r.c') diff --git a/sysdeps/ieee754/flt-32/e_lgammaf_r.c b/sysdeps/ieee754/flt-32/e_lgammaf_r.c index 4d8a66bb39..1bd2122663 100644 --- a/sysdeps/ieee754/flt-32/e_lgammaf_r.c +++ b/sysdeps/ieee754/flt-32/e_lgammaf_r.c @@ -160,7 +160,7 @@ __ieee754_lgammaf_r(float x, int *signgamp) } if(hx<0) { if(ix>=0x4b000000) /* |x|>=2**23, must be -integer */ - return x/zero; + return __fabsf (x)/zero; if (ix > 0x40000000 /* X < 2.0f. */ && ix < 0x41700000 /* X > -15.0f. */) return __lgamma_negf (x, signgamp); -- cgit 1.4.1