e5fb4b61b6
If none of the 16 coefficients that we quantize per loop iteration are larger than the zbin, directly skip to the next round of coeffs, rather than doing a full quantize loop that will eventually result in 16 zeroes. This incurs a jump cost, but saves a lot of other work. 32x32 quant goes from 1349 -> 1184 cycles. The same approach yielded no significantly positive results for smaller transforms, so is not used there (8x8: 103 -> 101 cycles; 16x16: 302 -> 306 cycles). Change-Id: I8fca17dc2543fc8eed1dbcd5100145e3c3a9b647
215 lines
9.7 KiB
NASM
215 lines
9.7 KiB
NASM
;
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; Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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;
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; Use of this source code is governed by a BSD-style license
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; that can be found in the LICENSE file in the root of the source
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; tree. An additional intellectual property rights grant can be found
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; in the file PATENTS. All contributing project authors may
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; be found in the AUTHORS file in the root of the source tree.
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;
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%include "third_party/x86inc/x86inc.asm"
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SECTION_RODATA
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pw_1: times 8 dw 1
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SECTION .text
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%macro QUANTIZE_FN 2
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cglobal quantize_%1, 0, %2, 15, coeff, ncoeff, skip, zbin, round, quant, \
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shift, qcoeff, dqcoeff, dequant, zbin_oq, \
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eob, scan, iscan
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cmp dword skipm, 0
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jne .blank
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; actual quantize loop - setup pointers, rounders, etc.
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movifnidn coeffq, coeffmp
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movifnidn ncoeffq, ncoeffmp
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mov r2, dequantmp
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movifnidn zbinq, zbinmp
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movifnidn roundq, roundmp
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movifnidn quantq, quantmp
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movd m4, dword zbin_oqm ; m4 = zbin_oq
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mova m0, [zbinq] ; m0 = zbin
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punpcklwd m4, m4
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mova m1, [roundq] ; m1 = round
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pshufd m4, m4, 0
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mova m2, [quantq] ; m2 = quant
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paddw m0, m4 ; m0 = zbin + zbin_oq
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mova m3, [r2q] ; m3 = dequant
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psubw m0, [pw_1]
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mov r2, shiftmp
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mov r3, qcoeffmp
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mova m4, [r2] ; m4 = shift
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mov r4, dqcoeffmp
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mov r5, iscanmp
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pxor m5, m5 ; m5 = dedicated zero
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DEFINE_ARGS coeff, ncoeff, d1, qcoeff, dqcoeff, iscan, d2, d3, d4, d5, d6, eob
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lea coeffq, [ coeffq+ncoeffq*2]
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lea iscanq, [ iscanq+ncoeffq*2]
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lea qcoeffq, [ qcoeffq+ncoeffq*2]
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lea dqcoeffq, [dqcoeffq+ncoeffq*2]
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neg ncoeffq
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; get DC and first 15 AC coeffs
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mova m9, [ coeffq+ncoeffq*2+ 0] ; m9 = c[i]
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mova m10, [ coeffq+ncoeffq*2+16] ; m10 = c[i]
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pabsw m6, m9 ; m6 = abs(m9)
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pabsw m11, m10 ; m11 = abs(m10)
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%ifidn %1, b_32x32
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paddw m6, m6
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paddw m11, m11
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%endif
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pcmpgtw m7, m6, m0 ; m7 = c[i] >= zbin
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punpckhqdq m0, m0
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pcmpgtw m12, m11, m0 ; m12 = c[i] >= zbin
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paddw m6, m1 ; m6 += round
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punpckhqdq m1, m1
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paddw m11, m1 ; m11 += round
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pmulhw m8, m6, m2 ; m8 = m6*q>>16
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punpckhqdq m2, m2
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pmulhw m13, m11, m2 ; m13 = m11*q>>16
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paddw m8, m6 ; m8 += m6
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paddw m13, m11 ; m13 += m11
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pmulhw m8, m4 ; m8 = m8*qsh>>16
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punpckhqdq m4, m4
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pmulhw m13, m4 ; m13 = m13*qsh>>16
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psignw m8, m9 ; m8 = reinsert sign
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psignw m13, m10 ; m13 = reinsert sign
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pand m8, m7
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pand m13, m12
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mova [qcoeffq+ncoeffq*2+ 0], m8
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mova [qcoeffq+ncoeffq*2+16], m13
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%ifidn %1, b_32x32
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pabsw m8, m8
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pabsw m13, m13
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%endif
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pmullw m8, m3 ; dqc[i] = qc[i] * q
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punpckhqdq m3, m3
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pmullw m13, m3 ; dqc[i] = qc[i] * q
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%ifidn %1, b_32x32
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psrlw m8, 1
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psrlw m13, 1
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psignw m8, m9
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psignw m13, m10
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%endif
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mova [dqcoeffq+ncoeffq*2+ 0], m8
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mova [dqcoeffq+ncoeffq*2+16], m13
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pcmpeqw m8, m5 ; m8 = c[i] == 0
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pcmpeqw m13, m5 ; m13 = c[i] == 0
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mova m6, [ iscanq+ncoeffq*2+ 0] ; m6 = scan[i]
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mova m11, [ iscanq+ncoeffq*2+16] ; m11 = scan[i]
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psubw m6, m7 ; m6 = scan[i] + 1
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psubw m11, m12 ; m11 = scan[i] + 1
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pandn m8, m6 ; m8 = max(eob)
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pandn m13, m11 ; m13 = max(eob)
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pmaxsw m8, m13
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add ncoeffq, mmsize
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jz .accumulate_eob
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.ac_only_loop:
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mova m9, [ coeffq+ncoeffq*2+ 0] ; m9 = c[i]
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mova m10, [ coeffq+ncoeffq*2+16] ; m10 = c[i]
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pabsw m6, m9 ; m6 = abs(m9)
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pabsw m11, m10 ; m11 = abs(m10)
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%ifidn %1, b_32x32
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paddw m6, m6
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paddw m11, m11
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%endif
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pcmpgtw m7, m6, m0 ; m7 = c[i] >= zbin
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pcmpgtw m12, m11, m0 ; m12 = c[i] >= zbin
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%ifidn %1, b_32x32
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pmovmskb r6, m7
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pmovmskb r2, m12
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or r6, r2
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jz .skip_iter
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%endif
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paddw m6, m1 ; m6 += round
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paddw m11, m1 ; m11 += round
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pmulhw m14, m6, m2 ; m14 = m6*q>>16
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pmulhw m13, m11, m2 ; m13 = m11*q>>16
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paddw m14, m6 ; m14 += m6
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paddw m13, m11 ; m13 += m11
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pmulhw m14, m4 ; m14 = m14*qsh>>16
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pmulhw m13, m4 ; m13 = m13*qsh>>16
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psignw m14, m9 ; m14 = reinsert sign
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psignw m13, m10 ; m13 = reinsert sign
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pand m14, m7
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pand m13, m12
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mova [qcoeffq+ncoeffq*2+ 0], m14
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mova [qcoeffq+ncoeffq*2+16], m13
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%ifidn %1, b_32x32
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pabsw m14, m14
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pabsw m13, m13
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%endif
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pmullw m14, m3 ; dqc[i] = qc[i] * q
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pmullw m13, m3 ; dqc[i] = qc[i] * q
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%ifidn %1, b_32x32
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psrlw m14, 1
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psrlw m13, 1
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psignw m14, m9
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psignw m13, m10
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%endif
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mova [dqcoeffq+ncoeffq*2+ 0], m14
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mova [dqcoeffq+ncoeffq*2+16], m13
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pcmpeqw m14, m5 ; m14 = c[i] == 0
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pcmpeqw m13, m5 ; m13 = c[i] == 0
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mova m6, [ iscanq+ncoeffq*2+ 0] ; m6 = scan[i]
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mova m11, [ iscanq+ncoeffq*2+16] ; m11 = scan[i]
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psubw m6, m7 ; m6 = scan[i] + 1
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psubw m11, m12 ; m11 = scan[i] + 1
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pandn m14, m6 ; m14 = max(eob)
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pandn m13, m11 ; m13 = max(eob)
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pmaxsw m8, m14
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pmaxsw m8, m13
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add ncoeffq, mmsize
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jl .ac_only_loop
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%ifidn %1, b_32x32
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jmp .accumulate_eob
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.skip_iter:
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mova [qcoeffq+ncoeffq*2+ 0], m5
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mova [qcoeffq+ncoeffq*2+16], m5
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mova [dqcoeffq+ncoeffq*2+ 0], m5
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mova [dqcoeffq+ncoeffq*2+16], m5
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add ncoeffq, mmsize
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jl .ac_only_loop
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%endif
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.accumulate_eob:
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; horizontally accumulate/max eobs and write into [eob] memory pointer
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mov r2, eobmp
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pshufd m7, m8, 0xe
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pmaxsw m8, m7
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pshuflw m7, m8, 0xe
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pmaxsw m8, m7
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pshuflw m7, m8, 0x1
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pmaxsw m8, m7
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pextrw [r2], m8, 0
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RET
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; skip-block, i.e. just write all zeroes
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.blank:
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mov r0, dqcoeffmp
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movifnidn ncoeffq, ncoeffmp
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mov r2, qcoeffmp
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mov r3, eobmp
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DEFINE_ARGS dqcoeff, ncoeff, qcoeff, eob
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lea dqcoeffq, [dqcoeffq+ncoeffq*2]
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lea qcoeffq, [ qcoeffq+ncoeffq*2]
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neg ncoeffq
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pxor m7, m7
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.blank_loop:
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mova [dqcoeffq+ncoeffq*2+ 0], m7
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mova [dqcoeffq+ncoeffq*2+16], m7
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mova [qcoeffq+ncoeffq*2+ 0], m7
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mova [qcoeffq+ncoeffq*2+16], m7
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add ncoeffq, mmsize
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jl .blank_loop
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mov word [eobq], 0
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RET
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%endmacro
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INIT_XMM ssse3
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QUANTIZE_FN b, 6
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QUANTIZE_FN b_32x32, 7
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