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diff --git a/third_party/dav1d/src/ppc/dav1d_types.h b/third_party/dav1d/src/ppc/dav1d_types.h
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+++ b/third_party/dav1d/src/ppc/dav1d_types.h
@@ -0,0 +1,54 @@
+/*
+ * Copyright © 2019, VideoLAN and dav1d authors
+ * Copyright © 2019, Luca Barbato
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. 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.
+ *
+ * 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 DAV1D_SRC_PPC_TYPES_H
+#define DAV1D_SRC_PPC_TYPES_H
+
+#include <altivec.h>
+#undef pixel
+
+#define u8x16 vector unsigned char
+#define i8x16 vector signed char
+#define b8x16 vector bool char
+#define u16x8 vector unsigned short
+#define i16x8 vector signed short
+#define b16x8 vector bool short
+#define u32x4 vector unsigned int
+#define i32x4 vector signed int
+#define b32x4 vector bool int
+#define u64x2 vector unsigned long long
+#define i64x2 vector signed long long
+#define b64x2 vector bool long long
+
+#define u8h_to_u16(v) ((u16x8) vec_mergeh((u8x16) v, vec_splat_u8(0)))
+#define u8l_to_u16(v) ((u16x8) vec_mergel((u8x16) v, vec_splat_u8(0)))
+#define u16h_to_i32(v) ((i32x4) vec_mergeh((u16x8) v, vec_splat_u16(0)))
+#define i16h_to_i32(v) ((i32x4) vec_unpackh((i16x8)v))
+#define u16l_to_i32(v) ((i32x4) vec_mergel((u16x8) v, vec_splat_u16(0)))
+#define i16l_to_i32(v) ((i32x4) vec_unpackl((i16x8)v))
+
+#endif /* DAV1D_SRC_PPC_TYPES_H */