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avcodec/h264: add avx 8-bit h264_idct_dc_add

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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
This commit is contained in:
James Darnley
2017-03-16 15:07:11 +01:00
parent f61d454ca1
commit 27460dfebc
2 changed files with 22 additions and 0 deletions
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20
libavcodec/x86/h264_idct.asm
View File

@@ -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
pshuflw 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, 6, 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

2
libavcodec/x86/h264dsp_init.c
View File

@@ -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)) {