1 files changed, 75 insertions, 0 deletions
diff --git a/newlib/libm/machine/spu/headers/fmax.h b/newlib/libm/machine/spu/headers/fmax.h
new file mode 100644
index 000000000..f3e3358e6
--- /dev/null
+++ b/newlib/libm/machine/spu/headers/fmax.h
@@ -0,0 +1,75 @@
+/*
+  (C) Copyright 2001,2006,
+  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.
+*/
+#ifndef _FMAX_H_
+#define _FMAX_H_	1
+
+#include <spu_intrinsics.h>
+#include "headers/vec_literal.h"
+
+/* Return the maximum numeric value of their arguments. If one argument
+ * is a NaN, fmax returns the other value.  If both are NaNs, then a NaN
+ * is returned.
+ *
+ * Notes:
+ * 1) Double precision denorms equate to zero so two denorms compare
+ *    equal thereby making the following true for two denorm inputs
+ *    fmax(a, b) != fmax(b, a);
+ */
+static __inline double _fmax(double x, double y)
+{
+  vec_uint4 nan_x, selector, abs_x, gt, eq;
+  vec_uint4 sign = VEC_LITERAL(vec_uint4, 0x80000000, 0, 0x80000000, 0);
+  vec_uint4 infinity = VEC_LITERAL(vec_uint4, 0x7FF00000, 0, 0x7FF00000, 0);
+  vec_double2 vx, vy, diff, max;
+
+  vx = spu_promote(x, 0);
+  vy = spu_promote(y, 0);
+
+  /* If x is a NaN, then select y as max
+   */
+  abs_x = spu_andc((vec_uint4)vx, sign);
+  gt = spu_cmpgt(abs_x, infinity);
+  eq = spu_cmpeq(abs_x, infinity);
+
+  nan_x = spu_or(gt, spu_and(eq, spu_rlqwbyte(gt, 4)));
+
+  diff = spu_sub(vx, vy);
+  selector = spu_orc(nan_x, spu_cmpgt((vec_int4)diff, -1));
+  selector = spu_maskw(spu_extract(selector, 0));
+
+  max = spu_sel(vx, vy, (vec_ullong2)selector);
+
+  return (spu_extract(max, 0));
+}
+
+#endif /* _FMAX_H_ */