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| author | Ronald S. Bultje <rsbultje@gmail.com> | 2013-12-01 21:27:34 -0500 |
|---|---|---|
| committer | Ronald S. Bultje <rsbultje@gmail.com> | 2013-12-07 12:39:36 -0500 |
| commit | 92436e8ad9bd4d44fba47e0b95622529108a96e5 (patch) | |
| tree | 0fe0c475841476601a9296235e56eacdd4c8c3f8 /libavcodec/x86 | |
| parent | b2045c44a94db4df97fdd753ea738fcf578d65d8 (diff) | |
| download | ffmpeg-92436e8ad9bd4d44fba47e0b95622529108a96e5.tar.gz | |
vp9: implement top/left half (4x4) sub-8x8-IDCT.
For that specific case (eob>3&&eob<=12), runtime of idct8x8 goes from
668 to 477 cycles. For all idct8x8, runtime goes from 521 to 490 cycles.
Diffstat (limited to 'libavcodec/x86')
| -rw-r--r-- | libavcodec/x86/vp9itxfm.asm | 43 |
1 files changed, 41 insertions, 2 deletions
diff --git a/libavcodec/x86/vp9itxfm.asm b/libavcodec/x86/vp9itxfm.asm index c382bdb4a9..ebf30440b2 100644 --- a/libavcodec/x86/vp9itxfm.asm +++ b/libavcodec/x86/vp9itxfm.asm @@ -39,7 +39,7 @@ VP9_IDCT_COEFFS %1, %2 VP9_IDCT_COEFFS_ALL 15137, 6270 VP9_IDCT_COEFFS_ALL 16069, 3196 -VP9_IDCT_COEFFS 9102, 13623 +VP9_IDCT_COEFFS_ALL 9102, 13623 pd_8192: times 4 dd 8192 pw_2048: times 8 dw 2048 @@ -205,6 +205,26 @@ cglobal vp9_idct_idct_4x4_add, 4,4,0, dst, stride, block, eob VP9_IDCT8_1D_FINALIZE %endmacro +%macro VP9_IDCT8_4x4_1D 0 + pmulhrsw m0, m12 ; m0=t1a/t0a + pmulhrsw m10, m2, [pw_15137x2] ; m10=t3a + pmulhrsw m2, [pw_6270x2] ; m2=t2a + pmulhrsw m11, m1, [pw_16069x2] ; m11=t7a + pmulhrsw m1, [pw_3196x2] ; m1=t4a + pmulhrsw m9, m3, [pw_9102x2] ; m9=-t5a + pmulhrsw m3, [pw_13623x2] ; m3=t6a + psubw m8, m0, m10 ; m8=t0a-t3a (t3) + paddw m10, m0 ; m10=t0a+t3a (t0) + SUMSUB_BA w, 2, 0, 4 ; m2=t1a+t2a (t1), m0=t1a-t2a (t2) + SUMSUB_BA w, 9, 1, 4 ; m1=t4a+t5a (t4), m9=t4a-t5a (t5a) + SWAP 1, 9 + SUMSUB_BA w, 3, 11, 4 ; m3=t7a+t6a (t7), m11=t7a-t6a (t6a) + SUMSUB_BA w, 1, 11, 4 ; m1=t6a+t5a (t6), m11=t6a-t5a (t5) + pmulhrsw m1, m12 ; m1=t6 + pmulhrsw m11, m12 ; m11=t5 + VP9_IDCT8_1D_FINALIZE +%endmacro + ; TODO: a lot of t* copies can probably be removed and merged with ; following SUMSUBs from VP9_IDCT8_1D_FINALIZE with AVX %macro VP9_IDCT8_2x2_1D 0 @@ -250,9 +270,12 @@ cglobal vp9_idct_idct_8x8_add, 4,4,13, dst, stride, block, eob mova m12, [pw_11585x2] ; often used - cmp eobd, 3 ; top left corner or less + cmp eobd, 12 ; top left half or less jg .idctfull + cmp eobd, 3 ; top left corner or less + jg .idcthalf + cmp eobd, 1 ; faster path for when only DC is set jne .idcttopleftcorner @@ -289,6 +312,22 @@ cglobal vp9_idct_idct_8x8_add, 4,4,13, dst, stride, block, eob VP9_IDCT8_WRITEOUT RET +.idcthalf: + movh m0, [blockq + 0] + movh m1, [blockq +16] + movh m2, [blockq +32] + movh m3, [blockq +48] + VP9_IDCT8_4x4_1D + TRANSPOSE8x8W 0, 1, 2, 3, 8, 9, 10, 11, 4 + VP9_IDCT8_4x4_1D + pxor m4, m4 + movh [blockq+ 0], m4 + movh [blockq+16], m4 + movh [blockq+32], m4 + movh [blockq+48], m4 + VP9_IDCT8_WRITEOUT + RET + .idctfull: ; generic full 8x8 idct/idct mova m0, [blockq+ 0] ; IN(0) mova m1, [blockq+ 16] ; IN(1) |