[FFmpeg-cvslog] h264pred: added AVX2 implementation for tm_vp8 16x16.

[Mirage Abeysekara]

ffmpeg | branch: master | Mirage Abeysekara <mirage.12 at cse.mrt.ac.lk> | Sun Mar 19 01:38:53 2017 +0530| [5eb4f95bef2f95c4e776c60613b2825064d02ba9] | committer: Ronald S. Bultje

h264pred: added AVX2 implementation for tm_vp8 16x16.

checkasm --bench results with 5000 runs

pred16x16_tm_vp8_c: 302.8
pred16x16_tm_vp8_mmx: 101.4
pred16x16_tm_vp8_mmxext: 95.5
pred16x16_tm_vp8_sse2: 95.1
pred16x16_tm_vp8_avx2: 38.2

Signed-off-by: Ronald S. Bultje <rsbultje at gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=5eb4f95bef2f95c4e776c60613b2825064d02ba9
---

 libavcodec/x86/h264_intrapred.asm    | 37 ++++++++++++++++++++++++++++++++++++
 libavcodec/x86/h264_intrapred_init.c |  7 +++++++
 2 files changed, 44 insertions(+)

diff --git a/libavcodec/x86/h264_intrapred.asm b/libavcodec/x86/h264_intrapred.asm
index c88d91b..0f3b462 100644
--- a/libavcodec/x86/h264_intrapred.asm
+++ b/libavcodec/x86/h264_intrapred.asm
@@ -268,6 +268,43 @@ cglobal pred16x16_tm_vp8_8, 2,6,6
     jg .loop
     REP_RET
 
+%if HAVE_AVX2_EXTERNAL
+INIT_YMM avx2
+cglobal pred16x16_tm_vp8_8, 2, 4, 5, dst, stride, stride3, iteration
+    sub                       dstq, strideq
+    pmovzxbw                    m0, [dstq]
+    vpbroadcastb               xm1, [r0-1]
+    pmovzxbw                    m1, xm1
+    psubw                       m0, m1
+    mov                 iterationd, 4
+    lea                   stride3q, [strideq*3]
+.loop:
+    vpbroadcastb               xm1, [dstq+strideq*1-1]
+    vpbroadcastb               xm2, [dstq+strideq*2-1]
+    vpbroadcastb               xm3, [dstq+stride3q-1]
+    vpbroadcastb               xm4, [dstq+strideq*4-1]
+    pmovzxbw                    m1, xm1
+    pmovzxbw                    m2, xm2
+    pmovzxbw                    m3, xm3
+    pmovzxbw                    m4, xm4
+    paddw                       m1, m0
+    paddw                       m2, m0
+    paddw                       m3, m0
+    paddw                       m4, m0
+    vpackuswb                   m1, m1, m2
+    vpackuswb                   m3, m3, m4
+    vpermq                      m1, m1, q3120
+    vpermq                      m3, m3, q3120
+    movdqa        [dstq+strideq*1], xm1
+    vextracti128  [dstq+strideq*2], m1, 1
+    movdqa       [dstq+stride3q*1], xm3
+    vextracti128  [dstq+strideq*4], m3, 1
+    lea                       dstq, [dstq+strideq*4]
+    dec                 iterationd
+    jg .loop
+    REP_RET
+%endif
+
 ;-----------------------------------------------------------------------------
 ; void ff_pred16x16_plane_*_8(uint8_t *src, int stride)
 ;-----------------------------------------------------------------------------
diff --git a/libavcodec/x86/h264_intrapred_init.c b/libavcodec/x86/h264_intrapred_init.c
index 528b92e..bdd5125 100644
--- a/libavcodec/x86/h264_intrapred_init.c
+++ b/libavcodec/x86/h264_intrapred_init.c
@@ -127,6 +127,7 @@ PRED16x16(plane_svq3, 8, ssse3)
 PRED16x16(tm_vp8, 8, mmx)
 PRED16x16(tm_vp8, 8, mmxext)
 PRED16x16(tm_vp8, 8, sse2)
+PRED16x16(tm_vp8, 8, avx2)
 
 PRED8x8(top_dc, 8, mmxext)
 PRED8x8(dc_rv40, 8, mmxext)
@@ -323,6 +324,12 @@ av_cold void ff_h264_pred_init_x86(H264PredContext *h, int codec_id,
                 }
             }
         }
+
+        if(EXTERNAL_AVX2(cpu_flags)){
+            if (codec_id == AV_CODEC_ID_VP8) {
+                h->pred16x16[PLANE_PRED8x8    ] = ff_pred16x16_tm_vp8_8_avx2;
+            }
+        }
     } else if (bit_depth == 10) {
         if (EXTERNAL_MMXEXT(cpu_flags)) {
             h->pred4x4[DC_PRED             ] = ff_pred4x4_dc_10_mmxext;