From 6d33cc9d9bde501e0906c42ee396d42cb4ca603c Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Mon, 19 Nov 2012 15:26:52 -0800 Subject: Fix spurious underflows in ldbl-128 atan implementation. With help from Joseph Myers. * sysdeps/ieee754/ldbl-128/s_atanl.c (__atanl): Handle tiny and very large arguments properly. * math/libm-test.inc (atan_test): New tests. (atan2_test): New tests. * sysdeps/sparc/fpu/libm-test-ulps: Update. * sysdeps/x86_64/fpu/libm-test-ulps: Update. --- math/libm-test.inc | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'math') diff --git a/math/libm-test.inc b/math/libm-test.inc index 0b254e1..2a60557 100644 --- a/math/libm-test.inc +++ b/math/libm-test.inc @@ -1187,6 +1187,8 @@ atan_test (void) TEST_f_f (atan, plus_infty, M_PI_2l); TEST_f_f (atan, minus_infty, -M_PI_2l); TEST_f_f (atan, nan_value, nan_value); + TEST_f_f (atan, max_value, M_PI_2l); + TEST_f_f (atan, -max_value, -M_PI_2l); TEST_f_f (atan, 1, M_PI_4l); TEST_f_f (atan, -1, -M_PI_4l); @@ -1295,6 +1297,9 @@ atan2_test (void) TEST_ff_f (atan2, max_value, max_value, M_PI_4l); + TEST_ff_f (atan2, max_value, min_value, M_PI_2l); + TEST_ff_f (atan2, -max_value, -min_value, -M_PI_2l); + TEST_ff_f (atan2, 0.75L, 1, 0.643501108793284386802809228717322638L); TEST_ff_f (atan2, -0.75L, 1.0L, -0.643501108793284386802809228717322638L); TEST_ff_f (atan2, 0.75L, -1.0L, 2.49809154479650885165983415456218025L); -- cgit v1.1