[FFmpeg-cvslog] lsws/ppc/yuv2rgb_altivec: Fix build in non-VSX environments

[Chip Kerchner]

ffmpeg | branch: master | Chip Kerchner <Chip.Kerchner at ibm.com> | Fri Oct  9 20:17:20 2020 -0400| [e7f53d6ac961011db6e97c255677a984b3c228fd] | committer: Andriy Gelman

lsws/ppc/yuv2rgb_altivec: Fix build in non-VSX environments

Add inline function for vec_xl if VSX is not supported. vec_xl intrinsic
is only available on POWER 7 or higher.

Fixes ticket #8750.

Signed-off-by: Andriy Gelman <andriy.gelman at gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=e7f53d6ac961011db6e97c255677a984b3c228fd
---

 libswscale/ppc/yuv2rgb_altivec.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/libswscale/ppc/yuv2rgb_altivec.c b/libswscale/ppc/yuv2rgb_altivec.c
index 4f5382e4c1..5e1033a973 100644
--- a/libswscale/ppc/yuv2rgb_altivec.c
+++ b/libswscale/ppc/yuv2rgb_altivec.c
@@ -284,6 +284,16 @@ static inline void cvtyuvtoRGB(SwsContext *c, vector signed short Y,
  * ------------------------------------------------------------------------------
  */
 
+#if !HAVE_VSX
+static inline vector unsigned char vec_xl(signed long long offset, const ubyte *addr)
+{
+    const vector unsigned char *v_addr = (const vector unsigned char *) (addr + offset);
+    vector unsigned char align_perm = vec_lvsl(offset, addr);
+
+    return (vector unsigned char) vec_perm(v_addr[0], v_addr[1], align_perm);
+}
+#endif /* !HAVE_VSX */
+
 #define DEFCSP420_CVT(name, out_pixels)                                       \
 static int altivec_ ## name(SwsContext *c, const unsigned char **in,          \
                             int *instrides, int srcSliceY, int srcSliceH,     \