Implement C23 atanpi

C23 adds various <math.h> function families originally defined in TS
18661-4.  Add the atanpi functions (atan(x)/pi).

Tested for x86_64 and x86, and with build-many-glibcs.py.

1 files changed, 49 insertions, 0 deletions

diff --git a/math/libm-test-atanpi.inc b/math/libm-test-atanpi.inc
new file mode 100644
index 0000000000..d24919e471
--- /dev/null
+++ b/math/libm-test-atanpi.inc
@@ -0,0 +1,49 @@
+/* Test atanpi.
+   Copyright (C) 2024 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include "libm-test-driver.c"
+
+static const struct test_f_f_data atanpi_test_data[] =
+  {
+    TEST_f_f (atanpi, plus_infty, 0.5, ERRNO_UNCHANGED),
+    TEST_f_f (atanpi, minus_infty, -0.5, ERRNO_UNCHANGED),
+    TEST_f_f (atanpi, qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_f_f (atanpi, -qnan_value, qnan_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_f_f (atanpi, snan_value, qnan_value, INVALID_EXCEPTION),
+    TEST_f_f (atanpi, -snan_value, qnan_value, INVALID_EXCEPTION),
+
+    AUTO_TESTS_f_f (atanpi),
+  };
+
+static void
+atanpi_test (void)
+{
+  ALL_RM_TEST (atanpi, 0, atanpi_test_data, RUN_TEST_LOOP_f_f, END);
+}
+
+static void
+do_test (void)
+{
+  atanpi_test ();
+}
+
+/*
+ * Local Variables:
+ * mode:c
+ * End:
+ */