[FFmpeg-cvslog] libavcodec/ppc/hpeldsp_altivec.c : fix ff_put_pixels16_altivec() for POWER LE

Rong Yan git at videolan.org
Fri Oct 10 14:28:53 CEST 2014


ffmpeg | branch: master | Rong Yan <rongyan236 at gmail.com> | Fri Oct 10 08:29:58 2014 +0000| [0d71bd5a9493a9021d08b46fb0ffb985d44dc178] | committer: Michael Niedermayer

libavcodec/ppc/hpeldsp_altivec.c : fix ff_put_pixels16_altivec() for POWER LE

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=0d71bd5a9493a9021d08b46fb0ffb985d44dc178
---

 libavcodec/ppc/hpeldsp_altivec.c |   34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/libavcodec/ppc/hpeldsp_altivec.c b/libavcodec/ppc/hpeldsp_altivec.c
index 7c3b5a1..79c2af8 100644
--- a/libavcodec/ppc/hpeldsp_altivec.c
+++ b/libavcodec/ppc/hpeldsp_altivec.c
@@ -36,6 +36,38 @@
 
 #if HAVE_ALTIVEC
 /* next one assumes that ((line_size % 16) == 0) */
+#if HAVE_VSX
+void ff_put_pixels16_altivec(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int h)
+{
+  register vector unsigned char pixelsv1;
+  register vector unsigned char pixelsv1B;
+  register vector unsigned char pixelsv1C;
+  register vector unsigned char pixelsv1D;
+
+  int i;
+  register ptrdiff_t line_size_2 = line_size << 1;
+  register ptrdiff_t line_size_3 = line_size + line_size_2;
+  register ptrdiff_t line_size_4 = line_size << 2;
+
+// hand-unrolling the loop by 4 gains about 15%
+// mininum execution time goes from 74 to 60 cycles
+// it's faster than -funroll-loops, but using
+// -funroll-loops w/ this is bad - 74 cycles again.
+// all this is on a 7450, tuning for the 7450
+  for (i = 0; i < h; i += 4) {
+    pixelsv1  = vec_vsx_ld( 0, pixels);
+    pixelsv1B = vec_vsx_ld(line_size, pixels);
+    pixelsv1C = vec_vsx_ld(line_size_2, pixels);
+    pixelsv1D = vec_vsx_ld(line_size_3, pixels);
+    vec_vsx_st(pixelsv1, 0, (unsigned char*)block);
+    vec_vsx_st(pixelsv1B, line_size, (unsigned char*)block);
+    vec_vsx_st(pixelsv1C, line_size_2, (unsigned char*)block);
+    vec_st(pixelsv1D, line_size_3, (unsigned char*)block);
+    pixels+=line_size_4;
+    block +=line_size_4;
+  }
+}
+#else
 void ff_put_pixels16_altivec(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int h)
 {
     register vector unsigned char pixelsv1, pixelsv2;
@@ -76,6 +108,8 @@ void ff_put_pixels16_altivec(uint8_t *block, const uint8_t *pixels, ptrdiff_t li
     }
 }
 
+#endif /* HAVE_VSX */
+
 /* next one assumes that ((line_size % 16) == 0) */
 #define op_avg(a,b)  a = ( ((a)|(b)) - ((((a)^(b))&0xFEFEFEFEUL)>>1) )
 void ff_avg_pixels16_altivec(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int h)



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