From 9946e7a949d3b0f2795d930aa2f2ce7bda5e4f8a Mon Sep 17 00:00:00 2001 From: Joseph Myers Date: Wed, 8 Jun 2016 21:32:57 +0000 Subject: Fix ldexp, scalbn, scalbln for sNaN input (bug 20225). The wrapper implementations of ldexp / scalbn / scalbln (architecture-independent), and their float / long double variants, return sNaN for sNaN input. This patch fixes them to add relevant arguments to themselves so that qNaN is returned in this case. Tested for x86_64 and x86. [BZ #20225] * math/s_ldexp.c (__ldexp): Add non-finite or zero argument to itself. * math/s_ldexpf.c (__ldexpf): Likewise. * math/s_ldexpl.c (__ldexpl): Likewise. * math/w_scalbln.c (__w_scalbln): Likewise. * math/w_scalblnf.c (__w_scalblnf): Likewise. * math/w_scalblnl.c (__w_scalblnl): Likewise. * math/libm-test.inc (scalbn_test_data): Add sNaN tests. (scalbln_test_data): Likewise. --- math/libm-test.inc | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'math/libm-test.inc') diff --git a/math/libm-test.inc b/math/libm-test.inc index 520f141446..583c27cfc0 100644 --- a/math/libm-test.inc +++ b/math/libm-test.inc @@ -11117,6 +11117,8 @@ static const struct test_fi_f_data scalbn_test_data[] = TEST_fi_f (scalbn, minus_infty, 1, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED), TEST_fi_f (scalbn, qnan_value, 1, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED), TEST_fi_f (scalbn, -qnan_value, 1, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED), + TEST_fi_f (scalbn, snan_value, 1, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION), + TEST_fi_f (scalbn, -snan_value, 1, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION), TEST_fi_f (scalbn, 0.8L, 4, 12.8L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED), TEST_fi_f (scalbn, -0.854375L, 5, -27.34L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED), @@ -11199,6 +11201,8 @@ static const struct test_fl_f_data scalbln_test_data[] = TEST_fl_f (scalbln, minus_infty, 1, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED), TEST_fl_f (scalbln, qnan_value, 1, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED), TEST_fl_f (scalbln, -qnan_value, 1, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED), + TEST_fl_f (scalbln, snan_value, 1, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION), + TEST_fl_f (scalbln, -snan_value, 1, qnan_value, NO_INEXACT_EXCEPTION|INVALID_EXCEPTION), TEST_fl_f (scalbln, 0.8L, 4, 12.8L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED), TEST_fl_f (scalbln, -0.854375L, 5, -27.34L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED), -- cgit 1.4.1