1 files changed, 72 insertions, 0 deletions
diff --git a/newlib/libm/machine/spu/headers/roundf.h b/newlib/libm/machine/spu/headers/roundf.h
new file mode 100644
index 000000000..16914d6f9
--- /dev/null
+++ b/newlib/libm/machine/spu/headers/roundf.h
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+/*
+  (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 _ROUNDF_H_
+#define _ROUNDF_H_	1
+
+#include <spu_intrinsics.h>
+#include "headers/vec_literal.h"
+
+/* Round the input to the nearest integer, rounding halfway
+ * cases away from zero.
+ */
+static __inline float _roundf(float x)
+{
+  vec_int4 exp;
+  vec_uint4 or_mask, and_mask, mask, addend;
+  vec_float4 in, out;
+
+  in = spu_promote(x, 0);
+
+  /* Add 0.5 (fixed precision to eliminate rounding issues)
+   */
+  exp = spu_sub(125, spu_and(spu_rlmask((vec_int4)in, -23), 0xFF));
+
+  addend = spu_and(spu_rlmask(VEC_SPLAT_U32(0x1000000), exp),
+                   spu_cmpgt((vec_uint4)exp, -31));
+
+  in = (vec_float4)spu_add((vec_uint4)in, addend);
+
+  /* Truncate the result.
+   */
+  exp = spu_sub(127, spu_and(spu_rlmask((vec_int4)in, -23), 0xFF));
+
+  or_mask = spu_cmpgt(exp, 0);
+  and_mask = spu_rlmask(VEC_SPLAT_U32(0x7FFFFF), exp);
+
+  mask = spu_or(spu_and(and_mask, spu_cmpgt(exp, -31)), or_mask);
+
+  out = spu_andc(in, (vec_float4)(mask));
+
+  return (spu_extract(out, 0));
+}
+#endif /* _ROUNDF_H_ */