From d1c12e85c1c91e4cc5f70a1b4a543a5a934ca149 Mon Sep 17 00:00:00 2001
From: Vadim Barkov <neverscaired@gmail.com>
Date: Thu, 9 Feb 2017 19:11:31 +0000
Subject: [PATCH] Added support for ppc64 big endian for filter_paeth VSX

---
 powerpc/filter_vsx_intrinsics.c | 23 ++++++++++++++++++++---
 1 file changed, 20 insertions(+), 3 deletions(-)

diff --git a/powerpc/filter_vsx_intrinsics.c b/powerpc/filter_vsx_intrinsics.c
index e1ba064a6..828bd25c6 100644
--- a/powerpc/filter_vsx_intrinsics.c
+++ b/powerpc/filter_vsx_intrinsics.c
@@ -1,4 +1,3 @@
-
 /* filter_vsx_intrinsics.c - PowerPC optimised filter functions
  *
  * Copyright (c) 2016 Glenn Randers-Pehrson
@@ -180,7 +179,6 @@ void png_read_filter_row_sub4_vsx(png_row_infop row_info, png_bytep row,
 
 }
 
-
 void png_read_filter_row_sub3_vsx(png_row_infop row_info, png_bytep row,
                                   png_const_bytep prev_row)
 {
@@ -469,6 +467,26 @@ void png_read_filter_row_avg3_vsx(png_row_infop row_info, png_bytep row,
 #  define VEC_SHORT_TO_CHAR3_3 (vector unsigned char){16,16,16,16,16,16,16,16,16, 0, 2, 4,16,16,16,16}
 #  define VEC_SHORT_TO_CHAR4_3 (vector unsigned char){16,16,16,16,16,16,16,16,16,16,16,16, 0, 2, 4,16}
 
+#elif defined(__BIG_ENDIAN__)
+
+#  define VEC_CHAR_TO_SHORT1_4 (vector unsigned char){16, 4,16, 5,16, 6,16, 7,16,16,16,16,16,16,16,16}
+#  define VEC_CHAR_TO_SHORT2_4 (vector unsigned char){16, 8,16, 9,16,10,16,11,16,16,16,16,16,16,16,16}
+#  define VEC_CHAR_TO_SHORT3_4 (vector unsigned char){16,12,16,13,16,14,16,15,16,16,16,16,16,16,16,16}
+
+#  define VEC_SHORT_TO_CHAR1_4 (vector unsigned char){16,16,16,16, 1, 3, 5, 7,16,16,16,16,16,16,16,16}
+#  define VEC_SHORT_TO_CHAR2_4 (vector unsigned char){16,16,16,16,16,16,16,16, 1, 3, 5, 7,16,16,16,16}
+#  define VEC_SHORT_TO_CHAR3_4 (vector unsigned char){16,16,16,16,16,16,16,16,16,16,16,16, 1, 3, 5, 7}
+
+#  define VEC_CHAR_TO_SHORT1_3 (vector unsigned char){16, 3,16, 4,16, 5,16,16,16,16,16,16,16,16,16,16}
+#  define VEC_CHAR_TO_SHORT2_3 (vector unsigned char){16, 6,16, 7,16, 8,16,16,16,16,16,16,16,16,16,16}
+#  define VEC_CHAR_TO_SHORT3_3 (vector unsigned char){16, 9,16,10,16,11,16,16,16,16,16,16,16,16,16,16}
+#  define VEC_CHAR_TO_SHORT4_3 (vector unsigned char){16,12,16,13,16,14,16,16,16,16,16,16,16,16,16,16}
+
+#  define VEC_SHORT_TO_CHAR1_3 (vector unsigned char){16,16,16, 1, 3, 5,16,16,16,16,16,16,16,16,16,16}
+#  define VEC_SHORT_TO_CHAR2_3 (vector unsigned char){16,16,16,16,16,16, 1, 3, 5,16,16,16,16,16,16,16}
+#  define VEC_SHORT_TO_CHAR3_3 (vector unsigned char){16,16,16,16,16,16,16,16,16, 1, 3, 5,16,16,16,16}
+#  define VEC_SHORT_TO_CHAR4_3 (vector unsigned char){16,16,16,16,16,16,16,16,16,16,16,16, 1, 3, 5,16}
+
 #endif
 
 #define vsx_char_to_short(vec,offset,bpp) (vector unsigned short)vec_perm((vec),VEC_CHAR_ZERO,VEC_CHAR_TO_SHORT##offset##_##bpp)
@@ -742,7 +760,6 @@ void png_read_filter_row_paeth3_vsx(png_row_infop row_info, png_bytep row,
      }
 }
 
-
 #endif /* PNG_POWERPC_VSX_OPT > 0 */
 #endif /* PNG_POWERPC_VSX_IMPLEMENTATION == 1 (intrinsics) */
 #endif /* READ */