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diff --git a/intern/cycles/util/types_float8_impl.h b/intern/cycles/util/types_float8_impl.h
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+++ b/intern/cycles/util/types_float8_impl.h
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+/*
+ * Original code Copyright 2017, Intel Corporation
+ * Modifications Copyright 2018, Blender Foundation.
+ *
+ * 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 name of Intel Corporation nor the names of its 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 __UTIL_TYPES_FLOAT8_IMPL_H__
+#define __UTIL_TYPES_FLOAT8_IMPL_H__
+
+#ifndef __UTIL_TYPES_H__
+#  error "Do not include this file directly, include util/types.h instead."
+#endif
+
+#ifndef __KERNEL_GPU__
+#  include <cstdio>
+#endif
+
+CCL_NAMESPACE_BEGIN
+
+#ifndef __KERNEL_GPU__
+#  ifdef __KERNEL_AVX2__
+__forceinline float8::float8()
+{
+}
+
+__forceinline float8::float8(const float8 &f) : m256(f.m256)
+{
+}
+
+__forceinline float8::float8(const __m256 &f) : m256(f)
+{
+}
+
+__forceinline float8::operator const __m256 &() const
+{
+  return m256;
+}
+
+__forceinline float8::operator __m256 &()
+{
+  return m256;
+}
+
+__forceinline float8 &float8::operator=(const float8 &f)
+{
+  m256 = f.m256;
+  return *this;
+}
+#  endif /* __KERNEL_AVX2__ */
+
+__forceinline float float8::operator[](int i) const
+{
+  util_assert(i >= 0);
+  util_assert(i < 8);
+  return *(&a + i);
+}
+
+__forceinline float &float8::operator[](int i)
+{
+  util_assert(i >= 0);
+  util_assert(i < 8);
+  return *(&a + i);
+}
+
+ccl_device_inline float8 make_float8(float f)
+{
+#  ifdef __KERNEL_AVX2__
+  float8 r(_mm256_set1_ps(f));
+#  else
+  float8 r = {f, f, f, f, f, f, f, f};
+#  endif
+  return r;
+}
+
+ccl_device_inline float8
+make_float8(float a, float b, float c, float d, float e, float f, float g, float h)
+{
+#  ifdef __KERNEL_AVX2__
+  float8 r(_mm256_set_ps(a, b, c, d, e, f, g, h));
+#  else
+  float8 r = {a, b, c, d, e, f, g, h};
+#  endif
+  return r;
+}
+
+#endif /* __KERNEL_GPU__ */
+
+CCL_NAMESPACE_END
+
+#endif /* __UTIL_TYPES_FLOAT8_IMPL_H__ */