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FFmpeg/libswscale/x86/output.asm

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;******************************************************************************
;* x86-optimized vertical line scaling functions
;* Copyright (c) 2011 Ronald S. Bultje <rsbultje@gmail.com>
;* Kieran Kunhya <kieran@kunhya.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
;* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
;******************************************************************************
%include "libavutil/x86/x86util.asm"
SECTION_RODATA
minshort: times 8 dw 0x8000
yuv2yuvX_16_start: times 4 dd 0x4000 - 0x40000000
yuv2yuvX_10_start: times 4 dd 0x10000
yuv2yuvX_9_start: times 4 dd 0x20000
yuv2yuvX_10_upper: times 8 dw 0x3ff
yuv2yuvX_9_upper: times 8 dw 0x1ff
pd_4: times 4 dd 4
pd_4min0x40000:times 4 dd 4 - (0x40000)
pw_16: times 8 dw 16
pw_32: times 8 dw 32
pw_512: times 8 dw 512
pw_1024: times 8 dw 1024
SECTION .text
;-----------------------------------------------------------------------------
; vertical line scaling
;
; void yuv2plane1_<output_size>_<opt>(const int16_t *src, uint8_t *dst, int dstW,
; const uint8_t *dither, int offset)
; and
; void yuv2planeX_<output_size>_<opt>(const int16_t *filter, int filterSize,
; const int16_t **src, uint8_t *dst, int dstW,
; const uint8_t *dither, int offset)
;
; Scale one or $filterSize lines of source data to generate one line of output
; data. The input is 15-bit in int16_t if $output_size is [8,10] and 19-bit in
; int32_t if $output_size is 16. $filter is 12-bits. $filterSize is a multiple
; of 2. $offset is either 0 or 3. $dither holds 8 values.
;-----------------------------------------------------------------------------
%macro yuv2planeX_fn 3
%if ARCH_X86_32
%define cntr_reg fltsizeq
%define movsx mov
%else
%define cntr_reg r7
%define movsx movsxd
%endif
cglobal yuv2planeX_%1, %3, 8, %2, filter, fltsize, src, dst, w, dither, offset
%if %1 == 8 || %1 == 9 || %1 == 10
pxor m6, m6
%endif ; %1 == 8/9/10
%if %1 == 8
%if ARCH_X86_32
%assign pad 0x2c - (stack_offset & 15)
SUB rsp, pad
%define m_dith m7
%else ; x86-64
%define m_dith m9
%endif ; x86-32
; create registers holding dither
movq m_dith, [ditherq] ; dither
test offsetd, offsetd
jz .no_rot
%if mmsize == 16
punpcklqdq m_dith, m_dith
%endif ; mmsize == 16
PALIGNR m_dith, m_dith, 3, m0
.no_rot:
%if mmsize == 16
punpcklbw m_dith, m6
%if ARCH_X86_64
punpcklwd m8, m_dith, m6
pslld m8, 12
%else ; x86-32
punpcklwd m5, m_dith, m6
pslld m5, 12
%endif ; x86-32/64
punpckhwd m_dith, m6
pslld m_dith, 12
%if ARCH_X86_32
mova [rsp+ 0], m5
mova [rsp+16], m_dith
%endif
%else ; mmsize == 8
punpcklbw m5, m_dith, m6
punpckhbw m_dith, m6
punpcklwd m4, m5, m6
punpckhwd m5, m6
punpcklwd m3, m_dith, m6
punpckhwd m_dith, m6
pslld m4, 12
pslld m5, 12
pslld m3, 12
pslld m_dith, 12
mova [rsp+ 0], m4
mova [rsp+ 8], m5
mova [rsp+16], m3
mova [rsp+24], m_dith
%endif ; mmsize == 8/16
%endif ; %1 == 8
xor r5, r5
.pixelloop:
%assign %%i 0
; the rep here is for the 8bit output mmx case, where dither covers
; 8 pixels but we can only handle 2 pixels per register, and thus 4
; pixels per iteration. In order to not have to keep track of where
; we are w.r.t. dithering, we unroll the mmx/8bit loop x2.
%if %1 == 8
%assign %%repcnt 16/mmsize
%else
%assign %%repcnt 1
%endif
%rep %%repcnt
%if %1 == 8
%if ARCH_X86_32
mova m2, [rsp+mmsize*(0+%%i)]
mova m1, [rsp+mmsize*(1+%%i)]
%else ; x86-64
mova m2, m8
mova m1, m_dith
%endif ; x86-32/64
%else ; %1 == 9/10/16
mova m1, [yuv2yuvX_%1_start]
mova m2, m1
%endif ; %1 == 8/9/10/16
movsx cntr_reg, fltsizem
.filterloop_ %+ %%i:
; input pixels
mov r6, [srcq+gprsize*cntr_reg-2*gprsize]
%if %1 == 16
mova m3, [r6+r5*4]
mova m5, [r6+r5*4+mmsize]
%else ; %1 == 8/9/10
mova m3, [r6+r5*2]
%endif ; %1 == 8/9/10/16
mov r6, [srcq+gprsize*cntr_reg-gprsize]
%if %1 == 16
mova m4, [r6+r5*4]
mova m6, [r6+r5*4+mmsize]
%else ; %1 == 8/9/10
mova m4, [r6+r5*2]
%endif ; %1 == 8/9/10/16
; coefficients
movd m0, [filterq+2*cntr_reg-4] ; coeff[0], coeff[1]
%if %1 == 16
pshuflw m7, m0, 0 ; coeff[0]
pshuflw m0, m0, 0x55 ; coeff[1]
pmovsxwd m7, m7 ; word -> dword
pmovsxwd m0, m0 ; word -> dword
pmulld m3, m7
pmulld m5, m7
pmulld m4, m0
pmulld m6, m0
paddd m2, m3
paddd m1, m5
paddd m2, m4
paddd m1, m6
%else ; %1 == 10/9/8
punpcklwd m5, m3, m4
punpckhwd m3, m4
SPLATD m0
pmaddwd m5, m0
pmaddwd m3, m0
paddd m2, m5
paddd m1, m3
%endif ; %1 == 8/9/10/16
sub cntr_reg, 2
jg .filterloop_ %+ %%i
%if %1 == 16
psrad m2, 31 - %1
psrad m1, 31 - %1
%else ; %1 == 10/9/8
psrad m2, 27 - %1
psrad m1, 27 - %1
%endif ; %1 == 8/9/10/16
%if %1 == 8
packssdw m2, m1
packuswb m2, m2
movh [dstq+r5*1], m2
%else ; %1 == 9/10/16
%if %1 == 16
packssdw m2, m1
paddw m2, [minshort]
%else ; %1 == 9/10
%if cpuflag(sse4)
packusdw m2, m1
%else ; mmxext/sse2
packssdw m2, m1
pmaxsw m2, m6
%endif ; mmxext/sse2/sse4/avx
pminsw m2, [yuv2yuvX_%1_upper]
%endif ; %1 == 9/10/16
mova [dstq+r5*2], m2
%endif ; %1 == 8/9/10/16
add r5, mmsize/2
sub wd, mmsize/2
%assign %%i %%i+2
%endrep
jg .pixelloop
%if %1 == 8
%if ARCH_X86_32
ADD rsp, pad
RET
%else ; x86-64
REP_RET
%endif ; x86-32/64
%else ; %1 == 9/10/16
REP_RET
%endif ; %1 == 8/9/10/16
%endmacro
%if ARCH_X86_32
INIT_MMX mmxext
yuv2planeX_fn 8, 0, 7
yuv2planeX_fn 9, 0, 5
yuv2planeX_fn 10, 0, 5
%endif
INIT_XMM sse2
yuv2planeX_fn 8, 10, 7
yuv2planeX_fn 9, 7, 5
yuv2planeX_fn 10, 7, 5
INIT_XMM sse4
yuv2planeX_fn 8, 10, 7
yuv2planeX_fn 9, 7, 5
yuv2planeX_fn 10, 7, 5
yuv2planeX_fn 16, 8, 5
INIT_XMM avx
yuv2planeX_fn 8, 10, 7
yuv2planeX_fn 9, 7, 5
yuv2planeX_fn 10, 7, 5
; %1=outout-bpc, %2=alignment (u/a)
%macro yuv2plane1_mainloop 2
.loop_%2:
%if %1 == 8
paddsw m0, m2, [srcq+wq*2+mmsize*0]
paddsw m1, m3, [srcq+wq*2+mmsize*1]
psraw m0, 7
psraw m1, 7
packuswb m0, m1
mov%2 [dstq+wq], m0
%elif %1 == 16
paddd m0, m4, [srcq+wq*4+mmsize*0]
paddd m1, m4, [srcq+wq*4+mmsize*1]
paddd m2, m4, [srcq+wq*4+mmsize*2]
paddd m3, m4, [srcq+wq*4+mmsize*3]
psrad m0, 3
psrad m1, 3
psrad m2, 3
psrad m3, 3
%if cpuflag(sse4) ; avx/sse4
packusdw m0, m1
packusdw m2, m3
%else ; mmx/sse2
packssdw m0, m1
packssdw m2, m3
paddw m0, m5
paddw m2, m5
%endif ; mmx/sse2/sse4/avx
mov%2 [dstq+wq*2+mmsize*0], m0
mov%2 [dstq+wq*2+mmsize*1], m2
%else ; %1 == 9/10
paddsw m0, m2, [srcq+wq*2+mmsize*0]
paddsw m1, m2, [srcq+wq*2+mmsize*1]
psraw m0, 15 - %1
psraw m1, 15 - %1
pmaxsw m0, m4
pmaxsw m1, m4
pminsw m0, m3
pminsw m1, m3
mov%2 [dstq+wq*2+mmsize*0], m0
mov%2 [dstq+wq*2+mmsize*1], m1
%endif
add wq, mmsize
jl .loop_%2
%endmacro
%macro yuv2plane1_fn 3
cglobal yuv2plane1_%1, %3, %3, %2, src, dst, w, dither, offset
movsxdifnidn wq, wd
add wq, mmsize - 1
and wq, ~(mmsize - 1)
%if %1 == 8
add dstq, wq
%else ; %1 != 8
lea dstq, [dstq+wq*2]
%endif ; %1 == 8
%if %1 == 16
lea srcq, [srcq+wq*4]
%else ; %1 != 16
lea srcq, [srcq+wq*2]
%endif ; %1 == 16
neg wq
%if %1 == 8
pxor m4, m4 ; zero
; create registers holding dither
movq m3, [ditherq] ; dither
test offsetd, offsetd
jz .no_rot
%if mmsize == 16
punpcklqdq m3, m3
%endif ; mmsize == 16
PALIGNR m3, m3, 3, m2
.no_rot:
%if mmsize == 8
mova m2, m3
punpckhbw m3, m4 ; byte->word
punpcklbw m2, m4 ; byte->word
%else
punpcklbw m3, m4
mova m2, m3
%endif
%elif %1 == 9
pxor m4, m4
mova m3, [pw_512]
mova m2, [pw_32]
%elif %1 == 10
pxor m4, m4
mova m3, [pw_1024]
mova m2, [pw_16]
%else ; %1 == 16
%if cpuflag(sse4) ; sse4/avx
mova m4, [pd_4]
%else ; mmx/sse2
mova m4, [pd_4min0x40000]
mova m5, [minshort]
%endif ; mmx/sse2/sse4/avx
%endif ; %1 == ..
; actual pixel scaling
%if mmsize == 8
yuv2plane1_mainloop %1, a
%else ; mmsize == 16
test dstq, 15
jnz .unaligned
yuv2plane1_mainloop %1, a
REP_RET
.unaligned:
yuv2plane1_mainloop %1, u
%endif ; mmsize == 8/16
REP_RET
%endmacro
%if ARCH_X86_32
INIT_MMX mmx
yuv2plane1_fn 8, 0, 5
yuv2plane1_fn 16, 0, 3
INIT_MMX mmxext
yuv2plane1_fn 9, 0, 3
yuv2plane1_fn 10, 0, 3
%endif
INIT_XMM sse2
yuv2plane1_fn 8, 5, 5
yuv2plane1_fn 9, 5, 3
yuv2plane1_fn 10, 5, 3
yuv2plane1_fn 16, 6, 3
INIT_XMM sse4
yuv2plane1_fn 16, 5, 3
INIT_XMM avx
yuv2plane1_fn 8, 5, 5
yuv2plane1_fn 9, 5, 3
yuv2plane1_fn 10, 5, 3
yuv2plane1_fn 16, 5, 3