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;******************************************************************************
;* x86-SIMD-optimized IDCT for prores
;* this is identical to "simple" IDCT except for the clip range
;*
;* Copyright (c) 2011 Ronald S. Bultje <rsbultje@gmail.com>
;*
;* This file is part of Libav.
;*
;* Libav is free software; you can redistribute it and/or
;* modify it under the terms of the GNU Lesser General Public
;* License as published by the Free Software Foundation; either
;* version 2.1 of the License, or (at your option) any later version.
;*
;* Libav is distributed in the hope that it will be useful,
;* but WITHOUT ANY WARRANTY; without even the implied warranty of
;* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;* Lesser General Public License for more details.
;*
;* You should have received a copy of the GNU Lesser General Public
;* License along with Libav; if not, write to the Free Software
;* 51, Inc., Foundation Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
;******************************************************************************
%include "x86inc.asm"
%include "x86util.asm"
%define W1sh2 22725 ; W1 = 90901 = 22725<<2 + 1
%define W2sh2 21407 ; W2 = 85627 = 21407<<2 - 1
%define W3sh2 19265 ; W3 = 77062 = 19265<<2 + 2
%define W4sh2 16384 ; W4 = 65535 = 16384<<2 - 1
%define W5sh2 12873 ; W5 = 51491 = 12873<<2 - 1
%define W6sh2 8867 ; W6 = 35468 = 8867<<2
%define W7sh2 4520 ; W7 = 18081 = 4520<<2 + 1
%ifdef ARCH_X86_64
SECTION_RODATA
w4_plus_w2: times 4 dw W4sh2, +W2sh2
w4_min_w2: times 4 dw W4sh2, -W2sh2
w4_plus_w6: times 4 dw W4sh2, +W6sh2
w4_min_w6: times 4 dw W4sh2, -W6sh2
w1_plus_w3: times 4 dw W1sh2, +W3sh2
w3_min_w1: times 4 dw W3sh2, -W1sh2
w7_plus_w3: times 4 dw W7sh2, +W3sh2
w3_min_w7: times 4 dw W3sh2, -W7sh2
w1_plus_w5: times 4 dw W1sh2, +W5sh2
w5_min_w1: times 4 dw W5sh2, -W1sh2
w5_plus_w7: times 4 dw W5sh2, +W7sh2
w7_min_w5: times 4 dw W7sh2, -W5sh2
row_round: times 8 dw (1<<14)
pw_88: times 8 dw 0x2008
cextern pw_4
cextern pw_512
cextern pw_1019
section .text align=16
; interleave data while maintaining source
; %1=type, %2=dstlo, %3=dsthi, %4=src, %5=interleave
%macro SBUTTERFLY3 5
punpckl%1 m%2, m%4, m%5
punpckh%1 m%3, m%4, m%5
%endmacro
; %1/%2=src1/dst1, %3/%4=dst2, %5/%6=src2, %7=shift
; action: %3/%4 = %1/%2 - %5/%6; %1/%2 += %5/%6
; %1/%2/%3/%4 >>= %7; dword -> word (in %1/%3)
%macro SUMSUB_SHPK 7
psubd %3, %1, %5 ; { a0 - b0 }[0-3]
psubd %4, %2, %6 ; { a0 - b0 }[4-7]
paddd %1, %5 ; { a0 + b0 }[0-3]
paddd %2, %6 ; { a0 + b0 }[4-7]
psrad %1, %7
psrad %2, %7
psrad %3, %7
psrad %4, %7
packssdw %1, %2 ; row[0]
packssdw %3, %4 ; row[7]
%endmacro
; %1 = row or col (for rounding variable)
; %2 = number of bits to shift at the end
; %3 = optimization
%macro IDCT_1D 3
; a0 = (W4 * row[0]) + (1 << (15 - 1));
; a1 = a0;
; a2 = a0;
; a3 = a0;
; a0 += W2 * row[2];
; a1 += W6 * row[2];
; a2 -= W6 * row[2];
; a3 -= W2 * row[2];
%ifidn %1, col
paddw m10,[pw_88]
%endif
SBUTTERFLY3 wd, 0, 1, 10, 8 ; { row[0], row[2] }[0-3]/[4-7]
%ifidn %1, row
psubw m10,[row_round]
%endif
pmaddwd m2, m0, [w4_plus_w6]
pmaddwd m3, m1, [w4_plus_w6]
pmaddwd m4, m0, [w4_min_w6]
pmaddwd m5, m1, [w4_min_w6]
pmaddwd m6, m0, [w4_min_w2]
pmaddwd m7, m1, [w4_min_w2]
pmaddwd m0, [w4_plus_w2]
pmaddwd m1, [w4_plus_w2]
; a0: -1*row[0]-1*row[2]
; a1: -1*row[0]
; a2: -1*row[0]
; a3: -1*row[0]+1*row[2]
; a0 += W4*row[4] + W6*row[6]; i.e. -1*row[4]
; a1 -= W4*row[4] + W2*row[6]; i.e. -1*row[4]-1*row[6]
; a2 -= W4*row[4] - W2*row[6]; i.e. -1*row[4]+1*row[6]
; a3 += W4*row[4] - W6*row[6]; i.e. -1*row[4]
SBUTTERFLY3 wd, 8, 9, 13, 12 ; { row[4], row[6] }[0-3]/[4-7]
pmaddwd m10, m8, [w4_plus_w6]
pmaddwd m11, m9, [w4_plus_w6]
paddd m0, m10 ; a0[0-3]
paddd m1, m11 ; a0[4-7]
pmaddwd m10, m8, [w4_min_w6]
pmaddwd m11, m9, [w4_min_w6]
paddd m6, m10 ; a3[0-3]
paddd m7, m11 ; a3[4-7]
pmaddwd m10, m8, [w4_min_w2]
pmaddwd m11, m9, [w4_min_w2]
pmaddwd m8, [w4_plus_w2]
pmaddwd m9, [w4_plus_w2]
psubd m4, m10 ; a2[0-3] intermediate
psubd m5, m11 ; a2[4-7] intermediate
psubd m2, m8 ; a1[0-3] intermediate
psubd m3, m9 ; a1[4-7] intermediate
; load/store
mova [r2+ 0], m0
mova [r2+ 32], m2
mova [r2+ 64], m4
mova [r2+ 96], m6
mova m10,[r2+ 16] ; { row[1] }[0-7]
mova m8, [r2+ 48] ; { row[3] }[0-7]
mova m13,[r2+ 80] ; { row[5] }[0-7]
mova m14,[r2+112] ; { row[7] }[0-7]
mova [r2+ 16], m1
mova [r2+ 48], m3
mova [r2+ 80], m5
mova [r2+112], m7
%ifidn %1, row
pmullw m10,[r3+ 16]
pmullw m8, [r3+ 48]
pmullw m13,[r3+ 80]
pmullw m14,[r3+112]
%endif
; b0 = MUL(W1, row[1]);
; MAC(b0, W3, row[3]);
; b1 = MUL(W3, row[1]);
; MAC(b1, -W7, row[3]);
; b2 = MUL(W5, row[1]);
; MAC(b2, -W1, row[3]);
; b3 = MUL(W7, row[1]);
; MAC(b3, -W5, row[3]);
SBUTTERFLY3 wd, 0, 1, 10, 8 ; { row[1], row[3] }[0-3]/[4-7]
pmaddwd m2, m0, [w3_min_w7]
pmaddwd m3, m1, [w3_min_w7]
pmaddwd m4, m0, [w5_min_w1]
pmaddwd m5, m1, [w5_min_w1]
pmaddwd m6, m0, [w7_min_w5]
pmaddwd m7, m1, [w7_min_w5]
pmaddwd m0, [w1_plus_w3]
pmaddwd m1, [w1_plus_w3]
; b0: +1*row[1]+2*row[3]
; b1: +2*row[1]-1*row[3]
; b2: -1*row[1]-1*row[3]
; b3: +1*row[1]+1*row[3]
; MAC(b0, W5, row[5]);
; MAC(b0, W7, row[7]);
; MAC(b1, -W1, row[5]);
; MAC(b1, -W5, row[7]);
; MAC(b2, W7, row[5]);
; MAC(b2, W3, row[7]);
; MAC(b3, W3, row[5]);
; MAC(b3, -W1, row[7]);
SBUTTERFLY3 wd, 8, 9, 13, 14 ; { row[5], row[7] }[0-3]/[4-7]
; b0: -1*row[5]+1*row[7]
; b1: -1*row[5]+1*row[7]
; b2: +1*row[5]+2*row[7]
; b3: +2*row[5]-1*row[7]
pmaddwd m10, m8, [w1_plus_w5]
pmaddwd m11, m9, [w1_plus_w5]
pmaddwd m12, m8, [w5_plus_w7]
pmaddwd m13, m9, [w5_plus_w7]
psubd m2, m10 ; b1[0-3]
psubd m3, m11 ; b1[4-7]
paddd m0, m12 ; b0[0-3]
paddd m1, m13 ; b0[4-7]
pmaddwd m12, m8, [w7_plus_w3]
pmaddwd m13, m9, [w7_plus_w3]
pmaddwd m8, [w3_min_w1]
pmaddwd m9, [w3_min_w1]
paddd m4, m12 ; b2[0-3]
paddd m5, m13 ; b2[4-7]
paddd m6, m8 ; b3[0-3]
paddd m7, m9 ; b3[4-7]
; row[0] = (a0 + b0) >> 15;
; row[7] = (a0 - b0) >> 15;
; row[1] = (a1 + b1) >> 15;
; row[6] = (a1 - b1) >> 15;
; row[2] = (a2 + b2) >> 15;
; row[5] = (a2 - b2) >> 15;
; row[3] = (a3 + b3) >> 15;
; row[4] = (a3 - b3) >> 15;
mova m8, [r2+ 0] ; a0[0-3]
mova m9, [r2+16] ; a0[4-7]
SUMSUB_SHPK m8, m9, m10, m11, m0, m1, %2
mova m0, [r2+32] ; a1[0-3]
mova m1, [r2+48] ; a1[4-7]
SUMSUB_SHPK m0, m1, m9, m11, m2, m3, %2
mova m1, [r2+64] ; a2[0-3]
mova m2, [r2+80] ; a2[4-7]
SUMSUB_SHPK m1, m2, m11, m3, m4, m5, %2
mova m2, [r2+96] ; a3[0-3]
mova m3, [r2+112] ; a3[4-7]
SUMSUB_SHPK m2, m3, m4, m5, m6, m7, %2
%endmacro
; void prores_idct_put_10_<opt>(uint8_t *pixels, int stride,
; DCTELEM *block, const int16_t *qmat);
%macro idct_put_fn 2
cglobal prores_idct_put_10_%1, 4, 4, %2
movsxd r1, r1d
pxor m15, m15 ; zero
; for (i = 0; i < 8; i++)
; idctRowCondDC(block + i*8);
mova m10,[r2+ 0] ; { row[0] }[0-7]
mova m8, [r2+32] ; { row[2] }[0-7]
mova m13,[r2+64] ; { row[4] }[0-7]
mova m12,[r2+96] ; { row[6] }[0-7]
pmullw m10,[r3+ 0]
pmullw m8, [r3+32]
pmullw m13,[r3+64]
pmullw m12,[r3+96]
IDCT_1D row, 15, %1
; transpose for second part of IDCT
TRANSPOSE8x8W 8, 0, 1, 2, 4, 11, 9, 10, 3
mova [r2+ 16], m0
mova [r2+ 48], m2
mova [r2+ 80], m11
mova [r2+112], m10
SWAP 8, 10
SWAP 1, 8
SWAP 4, 13
SWAP 9, 12
; for (i = 0; i < 8; i++)
; idctSparseColAdd(dest + i, line_size, block + i);
IDCT_1D col, 18, %1
; clip/store
mova m3, [pw_4]
mova m5, [pw_1019]
pmaxsw m8, m3
pmaxsw m0, m3
pmaxsw m1, m3
pmaxsw m2, m3
pmaxsw m4, m3
pmaxsw m11, m3
pmaxsw m9, m3
pmaxsw m10, m3
pminsw m8, m5
pminsw m0, m5
pminsw m1, m5
pminsw m2, m5
pminsw m4, m5
pminsw m11, m5
pminsw m9, m5
pminsw m10, m5
lea r2, [r1*3]
mova [r0 ], m8
mova [r0+r1 ], m0
mova [r0+r1*2], m1
mova [r0+r2 ], m2
lea r0, [r0+r1*4]
mova [r0 ], m4
mova [r0+r1 ], m11
mova [r0+r1*2], m9
mova [r0+r2 ], m10
RET
%endmacro
INIT_XMM
idct_put_fn sse2, 16
INIT_XMM
idct_put_fn sse4, 16
INIT_AVX
idct_put_fn avx, 16
%endif
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