1 files changed, 69 insertions, 0 deletions
diff --git a/newlib/libm/machine/spu/headers/dom_chkd_negone_one.h b/newlib/libm/machine/spu/headers/dom_chkd_negone_one.h
new file mode 100644
index 000000000..e364f86f8
--- /dev/null
+++ b/newlib/libm/machine/spu/headers/dom_chkd_negone_one.h
@@ -0,0 +1,69 @@
+/*
+  Copyright 2007
+  International Business Machines Corporation,
+  Sony Computer Entertainment, Incorporated,
+  Toshiba Corporation,
+
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright notice,
+  this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+  notice, this list of conditions and the following disclaimer in the
+  documentation and/or other materials provided with the distribution.
+    * Neither the names of the copyright holders nor the names of their
+  contributors may be used to endorse or promote products derived from
+  this software without specific prior written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+  IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+  TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+  PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
+  OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#include <errno.h>
+
+/*
+ * dom_chkd_negone_one: "domain check double negative-one and one":
+ *
+ * Set errno to EDOM if |x| > 1.0.
+ *
+ * This is for scalar use only, the input is a vector double, but both
+ * values in the vector must be the same.
+ *
+ * We *only* set errno, and do not bother setting the actual return value
+ * of any functions to a NAN. That way, we have the same method for double
+ * and single precision (there are no float nans for single precision so
+ * those can't return a nan).
+ *
+ * Note that for newlib, errno is/was a function call, so not so obviously
+ * we are not branchless here. Unknown if adding a branch (and avoiding a
+ * call to __errno) is faster than this current code.
+ */
+
+static __inline void dom_chkd_negone_one (vector double vx)
+{
+  vector unsigned long long domain;
+  vector signed int verrno;
+  vector double ones = { 1.0, 1.0 };
+  vector signed int fail = { EDOM, EDOM, EDOM, EDOM };
+
+  domain = spu_cmpabsgt(vx, ones);
+  verrno = spu_splats(errno);
+  /*
+   * domain is 2 long longs, but they have the same value. Even so, no
+   * special code is needed to extract the scalar errno (we have all ones
+   * or all zeroes for the preferred scalar slot).
+   */
+  errno = spu_extract(spu_sel(verrno, fail, (vector unsigned int) domain), 0);
+}