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Code Issues Releases Activity

avcodec/h264: add avx 8-bit h264_idct_add

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Haswell:
 - 1.11x faster (522±0.4 vs. 469±1.8 decicycles) compared with mmxext

Skylake-U:
 - 1.21x faster (671±5.5 vs. 555±1.4 decicycles) compared with mmxext
This commit is contained in:
James Darnley
2017-03-16 14:59:48 +01:00
parent b5325c6711
commit f61d454ca1
2 changed files with 35 additions and 1 deletions
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33
libavcodec/x86/h264_idct.asm
View File

@@ -65,7 +65,15 @@ SECTION .text
IDCT4_1D w, 0, 1, 2, 3, 4, 5
mova m6, [pw_32]
TRANSPOSE4x4W 0, 1, 2, 3, 4
%if mmsize == 8
TRANSPOSE4x4W 0, 1, 2, 3, 4
%else
punpcklwd m0, m1
punpcklwd m2, m3
SBUTTERFLY dq, 0, 2, 4
MOVHL m1, m0
MOVHL m3, m2
%endif
paddw m0, m6
IDCT4_1D w, 0, 1, 2, 3, 4, 5
pxor m7, m7
@@ -1131,3 +1139,26 @@ INIT_MMX mmx
IDCT_DC_DEQUANT 0
INIT_MMX sse2
IDCT_DC_DEQUANT 7
INIT_XMM avx
; %unmacro STORE_DIFFx2 8 ; remove macro from x86util.asm but yasm doesn't have this yet
%macro STORE_DIFFx2 8 ; add1, add2, reg1, reg2, zero, shift, source, stride
movd %3, [%7]
movd %4, [%7+%8]
psraw %1, %6
psraw %2, %6
punpcklbw %3, %5
punpcklbw %4, %5
paddw %3, %1
paddw %4, %2
packuswb %3, %5
packuswb %4, %5
movd [%7], %3
movd [%7+%8], %4
%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

3
libavcodec/x86/h264dsp_init.c
View File

@@ -32,6 +32,7 @@ void ff_h264_idct ## NUM ## _add_ ## DEPTH ## _ ## OPT(uint8_t *dst, \
int stride);
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, 10, mmxext)
@@ -337,6 +338,8 @@ av_cold void ff_h264dsp_init_x86(H264DSPContext *c, const int bit_depth,
c->h264_h_loop_filter_chroma = ff_deblock_h_chroma422_8_avx;
c->h264_h_loop_filter_chroma_intra = ff_deblock_h_chroma422_intra_8_avx;
}
c->h264_idct_add = ff_h264_idct_add_8_avx;
}
} else if (bit_depth == 10) {
if (EXTERNAL_MMXEXT(cpu_flags)) {