Haswell:
- 1.02x faster (405±0.7 vs. 397±0.8 decicycles) compared with mmxext
Skylake-U:
- 1.06x faster (498±1.8 vs. 470±1.3 decicycles) compared with mmxext
---
libavcodec/x86/h264_idct.asm | 20 ++++++++++++++++++++
libavcodec/x86/h264dsp_init.c | 2 ++
2 files changed, 22 insertions(+)
diff --git a/libavcodec/x86/h264_idct.asm b/libavcodec/x86/h264_idct.asm
index 24fb4d2..7fd57d3 100644
--- a/libavcodec/x86/h264_idct.asm
+++ b/libavcodec/x86/h264_idct.asm
@@ -1158,7 +1158,27 @@ INIT_XMM avx
movd [%7+%8], %4
%endmacro
+%macro DC_ADD_INIT 1
+ add %1d, 32
+ sar %1d, 6
+ movd m0, %1d
+ SPLATW m0, m0, 0
+ lea %1, [3*stride_q]
+ pxor m1, m1
+ psubw m1, m0
+ packuswb m0, m0
+ packuswb m1, m1
+%endmacro
+
cglobal h264_idct_add_8, 3, 3, 8, dst_, block_, stride_
movsxdifnidn stride_q, stride_d
IDCT4_ADD dst_q, block_q, stride_q
RET
+
+cglobal h264_idct_dc_add_8, 3, 4, 0, dst_, block_, stride_
+ movsxdifnidn stride_q, stride_d
+ movsx r3d, word [block_q]
+ mov dword [block_q], 0
+ DC_ADD_INIT r3
+ DC_ADD_MMXEXT_OP movd, dst_q, stride_q, r3
+RET
diff --git a/libavcodec/x86/h264dsp_init.c b/libavcodec/x86/h264dsp_init.c
index 8ba085f..bf74937 100644
--- a/libavcodec/x86/h264dsp_init.c
+++ b/libavcodec/x86/h264dsp_init.c
@@ -35,6 +35,7 @@ IDCT_ADD_FUNC(, 8, mmx)
IDCT_ADD_FUNC(, 8, avx)
IDCT_ADD_FUNC(, 10, sse2)
IDCT_ADD_FUNC(_dc, 8, mmxext)
+IDCT_ADD_FUNC(_dc, 8, avx)
IDCT_ADD_FUNC(_dc, 10, mmxext)
IDCT_ADD_FUNC(8_dc, 8, mmxext)
IDCT_ADD_FUNC(8_dc, 10, sse2)
@@ -340,6 +341,7 @@ av_cold void ff_h264dsp_init_x86(H264DSPContext *c, const
int bit_depth,
}
c->h264_idct_add = ff_h264_idct_add_8_avx;
+ c->h264_idct_dc_add = ff_h264_idct_dc_add_8_avx;
}
} else if (bit_depth == 10) {
if (EXTERNAL_MMXEXT(cpu_flags)) {
--
2.8.3
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