math: in lgamma* only check signgam when it's specified

[libc-test] / src / math / lgamma_r.c

diff --git a/src/math/lgamma_r.c b/src/math/lgamma_r.c
index 0645feb..78b66ea 100644 (file)
--- a/src/math/lgamma_r.c
+++ b/src/math/lgamma_r.c
@@ -34,7 +34,7 @@ int main(void)
                        err++;
                }
                d = ulperr(y, p->y, p->dy);
-               if (!checkulp(d, p->r) || yi != p->i) {
+               if (!checkulp(d, p->r) || (!isnan(p->x) && p->x!=-inf && !(p->e&DIVBYZERO) && yi != p->i)) {
                        printf("%s:%d: %s lgamma_r(%a) want %a,%lld got %a,%d ulperr %.3f = %a + %a\n",
                                p->file, p->line, rstr(p->r), p->x, p->y, p->i, y, yi, d, d-p->dy, p->dy);
                        err++;