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|
;*****************************************************************************
;* x86-optimized functions for gblur filter
;*
;* This file is part of FFmpeg.
;*
;* FFmpeg 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.
;*
;* FFmpeg 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 FFmpeg; if not, write to the Free Software
;* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
;******************************************************************************
%include "libavutil/x86/x86util.asm"
SECTION .text
%xdefine AVX2_MMSIZE 32
%xdefine AVX512_MMSIZE 64
%macro MOVSXDIFNIDN 1-*
%rep %0
movsxdifnidn %1q, %1d
%rotate 1
%endrep
%endmacro
%macro PUSH_MASK 5
%if mmsize == AVX2_MMSIZE
%assign %%n mmsize/4
%assign %%i 0
%rep %%n
mov %4, %3
and %4, 1
neg %4
mov dword [%5 + %%i*4], %4
sar %3, 1
%assign %%i %%i+1
%endrep
movu %1, [%5]
%else
kmovd %2, %3
%endif
%endmacro
%macro VMASKMOVPS 4
%if mmsize == AVX2_MMSIZE
vpmaskmovd %1, %3, %2
%else
kmovw k7, %4
vmovups %1{k7}, %2
%endif
%endmacro
; void ff_horiz_slice_sse4(float *ptr, int width, int height, int steps,
; float nu, float bscale)
%macro HORIZ_SLICE 0
%if UNIX64
cglobal horiz_slice, 4, 9, 9, ptr, width, height, steps, x, y, step, stride, remain
%else
cglobal horiz_slice, 4, 9, 9, ptr, width, height, steps, nu, bscale, x, y, step, stride, remain
%endif
%if WIN64
movss m0, num
movss m1, bscalem
DEFINE_ARGS ptr, width, height, steps, x, y, step, stride, remain
%endif
movsxdifnidn widthq, widthd
mulss m2, m0, m0 ; nu ^ 2
mulss m3, m2, m0 ; nu ^ 3
mulss m4, m3, m0 ; nu ^ 4
xor xq, xq
xor yd, yd
mov strideq, widthq
; stride = width * 4
shl strideq, 2
; w = w - ((w - 1) & 3)
mov remainq, widthq
sub remainq, 1
and remainq, 3
sub widthq, remainq
shufps m0, m0, 0
shufps m2, m2, 0
shufps m3, m3, 0
shufps m4, m4, 0
.loop_y:
xor stepd, stepd
.loop_step:
; p0 *= bscale
mulss m5, m1, [ptrq + xq * 4]
movss [ptrq + xq * 4], m5
inc xq
; filter rightwards
; Here we are vectorizing the c version by 4
; for (x = 1; x < width; x++)
; ptr[x] += nu * ptr[x - 1];
; let p0 stands for ptr[x-1], the data from last loop
; and [p1,p2,p3,p4] be the vector data for this loop.
; Unrolling the loop, we get:
; p1' = p1 + p0*nu
; p2' = p2 + p1*nu + p0*nu^2
; p3' = p3 + p2*nu + p1*nu^2 + p0*nu^3
; p4' = p4 + p3*nu + p2*nu^2 + p1*nu^3 + p0*nu^4
; so we can do it in simd:
; [p1',p2',p3',p4'] = [p1,p2,p3,p4] + [p0,p1,p2,p3]*nu +
; [0,p0,p1,p2]*nu^2 + [0,0,p0,p1]*nu^3 +
; [0,0,0,p0]*nu^4
.loop_x:
movu m6, [ptrq + xq * 4] ; s = [p1,p2,p3,p4]
pslldq m7, m6, 4 ; [0, p1,p2,p3]
movss m7, m5 ; [p0,p1,p2,p3]
FMULADD_PS m6, m7, m0, m6, m8 ; s += [p0,p1,p2,p3] * nu
pslldq m7, 4 ; [0,p0,p1,p2]
FMULADD_PS m6, m7, m2, m6, m8 ; s += [0,p0,p1,p2] * nu^2
pslldq m7, 4
FMULADD_PS m6, m7, m3, m6, m8 ; s += [0,0,p0,p1] * nu^3
pslldq m7, 4
FMULADD_PS m6, m7, m4, m6, m8 ; s += [0,0,0,p0] * nu^4
movu [ptrq + xq * 4], m6
shufps m5, m6, m6, q3333
add xq, 4
cmp xq, widthq
jl .loop_x
add widthq, remainq
cmp xq, widthq
jge .end_scalar
.loop_scalar:
; ptr[x] += nu * ptr[x-1]
movss m5, [ptrq + 4*xq - 4]
mulss m5, m0
addss m5, [ptrq + 4*xq]
movss [ptrq + 4*xq], m5
inc xq
cmp xq, widthq
jl .loop_scalar
.end_scalar:
; ptr[width - 1] *= bscale
dec xq
mulss m5, m1, [ptrq + 4*xq]
movss [ptrq + 4*xq], m5
shufps m5, m5, 0
; filter leftwards
; for (; x > 0; x--)
; ptr[x - 1] += nu * ptr[x];
; The idea here is basically the same as filter rightwards.
; But we need to take care as the data layout is different.
; Let p0 stands for the ptr[x], which is the data from last loop.
; The way we do it in simd as below:
; [p-4', p-3', p-2', p-1'] = [p-4, p-3, p-2, p-1]
; + [p-3, p-2, p-1, p0] * nu
; + [p-2, p-1, p0, 0] * nu^2
; + [p-1, p0, 0, 0] * nu^3
; + [p0, 0, 0, 0] * nu^4
.loop_x_back:
sub xq, 4
movu m6, [ptrq + xq * 4] ; s = [p-4, p-3, p-2, p-1]
psrldq m7, m6, 4 ; [p-3, p-2, p-1, 0 ]
blendps m7, m5, 0x8 ; [p-3, p-2, p-1, p0 ]
FMULADD_PS m6, m7, m0, m6, m8 ; s+= [p-3, p-2, p-1, p0 ] * nu
psrldq m7, 4 ;
FMULADD_PS m6, m7, m2, m6, m8 ; s+= [p-2, p-1, p0, 0] * nu^2
psrldq m7, 4
FMULADD_PS m6, m7, m3, m6, m8 ; s+= [p-1, p0, 0, 0] * nu^3
psrldq m7, 4
FMULADD_PS m6, m7, m4, m6, m8 ; s+= [p0, 0, 0, 0] * nu^4
movu [ptrq + xq * 4], m6
shufps m5, m6, m6, 0 ; m5 = [p-4', p-4', p-4', p-4']
cmp xq, remainq
jg .loop_x_back
cmp xq, 0
jle .end_scalar_back
.loop_scalar_back:
; ptr[x-1] += nu * ptr[x]
movss m5, [ptrq + 4*xq]
mulss m5, m0
addss m5, [ptrq + 4*xq - 4]
movss [ptrq + 4*xq - 4], m5
dec xq
cmp xq, 0
jg .loop_scalar_back
.end_scalar_back:
; reset aligned width for next line
sub widthq, remainq
inc stepd
cmp stepd, stepsd
jl .loop_step
add ptrq, strideq
inc yd
cmp yd, heightd
jl .loop_y
RET
%endmacro
%if ARCH_X86_64
INIT_XMM sse4
HORIZ_SLICE
INIT_XMM avx2
HORIZ_SLICE
%endif
%macro POSTSCALE_SLICE 0
cglobal postscale_slice, 2, 2, 4, ptr, length, postscale, min, max
shl lengthd, 2
add ptrq, lengthq
neg lengthq
%if ARCH_X86_32
VBROADCASTSS m0, postscalem
VBROADCASTSS m1, minm
VBROADCASTSS m2, maxm
%elif WIN64
VBROADCASTSS m0, xmm2
VBROADCASTSS m1, xmm3
VBROADCASTSS m2, maxm
%else ; UNIX
VBROADCASTSS m0, xmm0
VBROADCASTSS m1, xmm1
VBROADCASTSS m2, xmm2
%endif
.loop:
%if cpuflag(avx2) || cpuflag(avx512)
mulps m3, m0, [ptrq + lengthq]
%else
movu m3, [ptrq + lengthq]
mulps m3, m0
%endif
maxps m3, m1
minps m3, m2
movu [ptrq+lengthq], m3
add lengthq, mmsize
jl .loop
RET
%endmacro
INIT_XMM sse
POSTSCALE_SLICE
%if HAVE_AVX2_EXTERNAL
INIT_YMM avx2
POSTSCALE_SLICE
%endif
%if HAVE_AVX512_EXTERNAL
INIT_ZMM avx512
POSTSCALE_SLICE
%endif
;*******************************************************************************
; void ff_verti_slice(float *buffer, int width, int height, int column_begin,
; int column_end, int steps, float nu, float bscale);
;*******************************************************************************
%macro VERTI_SLICE 0
%if UNIX64
cglobal verti_slice, 6, 12, 9, 0-mmsize*2, buffer, width, height, cbegin, cend, \
steps, x, y, cwidth, step, ptr, stride
%else
cglobal verti_slice, 6, 12, 9, 0-mmsize*2, buffer, width, height, cbegin, cend, \
steps, nu, bscale, x, y, cwidth, step, \
ptr, stride
%endif
%assign cols mmsize/4
%if WIN64
VBROADCASTSS m0, num
VBROADCASTSS m1, bscalem
DEFINE_ARGS buffer, width, height, cbegin, cend, \
steps, x, y, cwidth, step, ptr, stride
MOVSXDIFNIDN width, height, cbegin, cend, steps
%else
VBROADCASTSS m0, xmm0 ; nu
VBROADCASTSS m1, xmm1 ; bscale
%endif
mov cwidthq, cendq
sub cwidthq, cbeginq
lea strideq, [widthq * 4]
xor xq, xq ; x = 0
cmp cwidthq, cols
jl .x_scalar
cmp cwidthq, 0x0
je .end_scalar
sub cwidthq, cols
.loop_x:
xor stepq, stepq
.loop_step:
; ptr = buffer + x + column_begin;
lea ptrq, [xq + cbeginq]
lea ptrq, [bufferq + ptrq*4]
; ptr[15:0] *= bcale;
movu m2, [ptrq]
mulps m2, m1
movu [ptrq], m2
; Filter downwards
mov yq, 1
.loop_y_down:
add ptrq, strideq ; ptrq += width
movu m3, [ptrq]
FMULADD_PS m2, m2, m0, m3, m2
movu [ptrq], m2
inc yq
cmp yq, heightq
jl .loop_y_down
mulps m2, m1
movu [ptrq], m2
; Filter upwards
dec yq
.loop_y_up:
sub ptrq, strideq
movu m3, [ptrq]
FMULADD_PS m2, m2, m0, m3, m2
movu [ptrq], m2
dec yq
cmp yq, 0
jg .loop_y_up
inc stepq
cmp stepq, stepsq
jl .loop_step
add xq, cols
cmp xq, cwidthq
jle .loop_x
add cwidthq, cols
cmp xq, cwidthq
jge .end_scalar
.x_scalar:
xor stepq, stepq
mov qword [rsp + 0x10], xq
sub cwidthq, xq
mov xq, 1
shlx cwidthq, xq, cwidthq
sub cwidthq, 1
PUSH_MASK m4, k1, cwidthd, xd, rsp + 0x20
mov xq, qword [rsp + 0x10]
.loop_step_scalar:
lea ptrq, [xq + cbeginq]
lea ptrq, [bufferq + ptrq*4]
VMASKMOVPS m2, [ptrq], m4, k1
mulps m2, m1
VMASKMOVPS [ptrq], m2, m4, k1
; Filter downwards
mov yq, 1
.x_scalar_loop_y_down:
add ptrq, strideq
VMASKMOVPS m3, [ptrq], m4, k1
FMULADD_PS m2, m2, m0, m3, m2
VMASKMOVPS [ptrq], m2, m4, k1
inc yq
cmp yq, heightq
jl .x_scalar_loop_y_down
mulps m2, m1
VMASKMOVPS [ptrq], m2, m4, k1
; Filter upwards
dec yq
.x_scalar_loop_y_up:
sub ptrq, strideq
VMASKMOVPS m3, [ptrq], m4, k1
FMULADD_PS m2, m2, m0, m3, m2
VMASKMOVPS [ptrq], m2, m4, k1
dec yq
cmp yq, 0
jg .x_scalar_loop_y_up
inc stepq
cmp stepq, stepsq
jl .loop_step_scalar
.end_scalar:
RET
%endmacro
%if ARCH_X86_64
%if HAVE_AVX2_EXTERNAL
INIT_YMM avx2
VERTI_SLICE
%endif
%if HAVE_AVX512_EXTERNAL
INIT_ZMM avx512
VERTI_SLICE
%endif
%endif
|
