ref: acde4240fe0fd55077cfefabba1348b632f33fbd
dir: /src/x86/cdef.asm/
; Copyright © 2018, VideoLAN and dav1d authors
; Copyright © 2018, Two Orioles, LLC
; All rights reserved.
;
; Redistribution and use in source and binary forms, with or without
; modification, are permitted provided that the following conditions are met:
;
; 1. Redistributions of source code must retain the above copyright notice, this
; list of conditions and the following disclaimer.
;
; 2. Redistributions in binary form must reproduce the above copyright notice,
; this list of conditions and the following disclaimer in the documentation
; and/or other materials provided with the distribution.
;
; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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; WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
; DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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; (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
; ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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%include "config.asm"
%include "ext/x86/x86inc.asm"
%if ARCH_X86_64
SECTION_RODATA 32
pd_04512763: dd 0, 4, 5, 1, 2, 7, 6, 3
div_table: dd 840, 420, 280, 210, 168, 140, 120, 105
dd 420, 210, 140, 105
pd_04261537: dd 0, 4, 2, 6, 1, 5, 3, 7
shufw_6543210x: db 12, 13, 10, 11, 8, 9, 6, 7, 4, 5, 2, 3, 0, 1, 14, 15
shufw_210xxxxx: db 4, 5, 2, 3, 0, 1, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
pw_128: times 2 dw 128
SECTION .text
INIT_YMM avx2
cglobal cdef_dir, 3, 4, 15, src, stride, var, stride3
lea stride3q, [strideq*3]
movq xm0, [srcq+strideq*0]
movq xm1, [srcq+strideq*1]
movq xm2, [srcq+strideq*2]
movq xm3, [srcq+stride3q]
lea srcq, [srcq+strideq*4]
vpbroadcastq m4, [srcq+strideq*0]
vpbroadcastq m5, [srcq+strideq*1]
vpbroadcastq m6, [srcq+strideq*2]
vpbroadcastq m7, [srcq+stride3q]
vpbroadcastd m8, [pw_128]
pxor m9, m9
vpblendd m0, m0, m7, 0xf0
vpblendd m1, m1, m6, 0xf0
vpblendd m2, m2, m5, 0xf0
vpblendd m3, m3, m4, 0xf0
punpcklbw m0, m9
punpcklbw m1, m9
punpcklbw m2, m9
punpcklbw m3, m9
psubw m0, m8
psubw m1, m8
psubw m2, m8
psubw m3, m8
; shuffle registers to generate partial_sum_diag[0-1] together
vpermq m7, m0, q1032
vpermq m6, m1, q1032
vpermq m5, m2, q1032
vpermq m4, m3, q1032
; start with partial_sum_hv[0-1]
paddw m8, m0, m1
paddw m9, m2, m3
phaddw m10, m0, m1
phaddw m11, m2, m3
paddw m8, m9
phaddw m10, m11
vextracti128 xm9, m8, 1
vextracti128 xm11, m10, 1
paddw xm8, xm9 ; partial_sum_hv[1]
phaddw xm10, xm11 ; partial_sum_hv[0]
vinserti128 m8, xm10, 1
vpbroadcastd m9, [div_table+44]
pmaddwd m8, m8
pmulld m8, m9 ; cost6[2a-d] | cost2[a-d]
; create aggregates [lower half]:
; m9 = m0:01234567+m1:x0123456+m2:xx012345+m3:xxx01234+
; m4:xxxx0123+m5:xxxxx012+m6:xxxxxx01+m7:xxxxxxx0
; m10= m1:7xxxxxxx+m2:67xxxxxx+m3:567xxxxx+
; m4:4567xxxx+m5:34567xxx+m6:234567xx+m7:1234567x
; and [upper half]:
; m9 = m0:xxxxxxx0+m1:xxxxxx01+m2:xxxxx012+m3:xxxx0123+
; m4:xxx01234+m5:xx012345+m6:x0123456+m7:01234567
; m10= m0:1234567x+m1:234567xx+m2:34567xxx+m3:4567xxxx+
; m4:567xxxxx+m5:67xxxxxx+m6:7xxxxxxx
; and then shuffle m11 [shufw_6543210x], unpcklwd, pmaddwd, pmulld, paddd
pslldq m9, m1, 2
psrldq m10, m1, 14
pslldq m11, m2, 4
psrldq m12, m2, 12
pslldq m13, m3, 6
psrldq m14, m3, 10
paddw m9, m11
paddw m10, m12
paddw m9, m13
paddw m10, m14
pslldq m11, m4, 8
psrldq m12, m4, 8
pslldq m13, m5, 10
psrldq m14, m5, 6
paddw m9, m11
paddw m10, m12
paddw m9, m13
paddw m10, m14
pslldq m11, m6, 12
psrldq m12, m6, 4
pslldq m13, m7, 14
psrldq m14, m7, 2
paddw m9, m11
paddw m10, m12
paddw m9, m13
paddw m10, m14 ; partial_sum_diag[0/1][8-14,zero]
vbroadcasti128 m14, [shufw_6543210x]
vbroadcasti128 m13, [div_table+16]
vbroadcasti128 m12, [div_table+0]
paddw m9, m0 ; partial_sum_diag[0/1][0-7]
pshufb m10, m14
punpckhwd m11, m9, m10
punpcklwd m9, m10
pmaddwd m11, m11
pmaddwd m9, m9
pmulld m11, m13
pmulld m9, m12
paddd m9, m11 ; cost0[a-d] | cost4[a-d]
; merge horizontally and vertically for partial_sum_alt[0-3]
paddw m10, m0, m1
paddw m11, m2, m3
paddw m12, m4, m5
paddw m13, m6, m7
phaddw m0, m4
phaddw m1, m5
phaddw m2, m6
phaddw m3, m7
; create aggregates [lower half]:
; m4 = m10:01234567+m11:x0123456+m12:xx012345+m13:xxx01234
; m11= m11:7xxxxxxx+m12:67xxxxxx+m13:567xxxxx
; and [upper half]:
; m4 = m10:xxx01234+m11:xx012345+m12:x0123456+m13:01234567
; m11= m10:567xxxxx+m11:67xxxxxx+m12:7xxxxxxx
; and then shuffle m11 [shufw_210xxxxx], unpcklwd, pmaddwd, pmulld, paddd
vbroadcasti128 m14, [shufw_210xxxxx]
pslldq m4, m11, 2
psrldq m11, 14
pslldq m5, m12, 4
psrldq m12, 12
pslldq m6, m13, 6
psrldq m13, 10
paddw m4, m10
paddw m11, m12
vpbroadcastd m12, [div_table+44]
paddw m5, m6
paddw m11, m13 ; partial_sum_alt[3/2] right
vbroadcasti128 m13, [div_table+32]
paddw m4, m5 ; partial_sum_alt[3/2] left
pshufb m11, m14
punpckhwd m6, m4, m11
punpcklwd m4, m11
pmaddwd m6, m6
pmaddwd m4, m4
pmulld m6, m12
pmulld m4, m13
paddd m4, m6 ; cost7[a-d] | cost5[a-d]
; create aggregates [lower half]:
; m5 = m0:01234567+m1:x0123456+m2:xx012345+m3:xxx01234
; m1 = m1:7xxxxxxx+m2:67xxxxxx+m3:567xxxxx
; and [upper half]:
; m5 = m0:xxx01234+m1:xx012345+m2:x0123456+m3:01234567
; m1 = m0:567xxxxx+m1:67xxxxxx+m2:7xxxxxxx
; and then shuffle m11 [shufw_210xxxxx], unpcklwd, pmaddwd, pmulld, paddd
pslldq m5, m1, 2
psrldq m1, 14
pslldq m6, m2, 4
psrldq m2, 12
pslldq m7, m3, 6
psrldq m3, 10
paddw m5, m0
paddw m1, m2
paddw m6, m7
paddw m1, m3 ; partial_sum_alt[0/1] right
paddw m5, m6 ; partial_sum_alt[0/1] left
pshufb m1, m14
punpckhwd m6, m5, m1
punpcklwd m5, m1
pmaddwd m6, m6
pmaddwd m5, m5
pmulld m6, m12
pmulld m5, m13
paddd m5, m6 ; cost1[a-d] | cost3[a-d]
mova xm0, [pd_04512763+ 0]
mova xm1, [pd_04512763+ 16]
phaddd m9, m8
phaddd m5, m4
phaddd m9, m5
vpermd m0, m9 ; cost[0/4/2/6]
vpermd m1, m9 ; cost[1/5/3/7]
; now find the best cost, its idx^4 complement, and its idx
pcmpgtd xm2, xm1, xm0 ; [1/5/3/7] > [0/4/2/6]
pand xm3, xm2, xm1
pandn xm4, xm2, xm0
por xm3, xm4 ; higher 4 values
pshufd xm1, xm1, q2301
pshufd xm0, xm0, q2301
pand xm1, xm2, xm1
pandn xm0, xm2, xm0
por xm0, xm1 ; complementary 4 values at idx^4 offset
pand xm13, xm2, [pd_04261537+16]
pandn xm14, xm2, [pd_04261537+ 0]
por xm14, xm13 ; indices
punpckhqdq xm4, xm3, xm0
punpcklqdq xm3, xm0
pcmpgtd xm5, xm4, xm3 ; [2or3-6or7] > [0or1/4or5]
punpcklqdq xm5, xm5
pand xm6, xm5, xm4
pandn xm7, xm5, xm3
por xm6, xm7 ; { highest 2 values, complements at idx^4 }
movhlps xm13, xm14
pand xm13, xm5, xm13
pandn xm14, xm5, xm14
por xm14, xm13
pshufd xm7, xm6, q3311
pcmpgtd xm8, xm7, xm6 ; [4or5or6or7] > [0or1or2or3]
punpcklqdq xm8, xm8
pand xm9, xm8, xm7
pandn xm10, xm8, xm6
por xm9, xm10 ; max
movhlps xm10, xm9 ; complement at idx^4
psubd xm9, xm10
psrld xm9, 10
movd [varq], xm9
pshufd xm13, xm14, q1111
pand xm13, xm8, xm13
pandn xm14, xm8, xm14
por xm14, xm13
movd eax, xm14
RET
%endif ; ARCH_X86_64