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ffmpeg/libavcodec/x86/hpeldsp.asm
Lynne bbe95f7353
x86: replace explicit REP_RETs with RETs 
From x86inc:
> On AMD cpus <=K10, an ordinary ret is slow if it immediately follows either
> a branch or a branch target. So switch to a 2-byte form of ret in that case.
> We can automatically detect "follows a branch", but not a branch target.
> (SSSE3 is a sufficient condition to know that your cpu doesn't have this problem.)

x86inc can automatically determine whether to use REP_RET rather than
REP in most of these cases, so impact is minimal. Additionally, a few
REP_RETs were used unnecessary, despite the return being nowhere near a
branch.

The only CPUs affected were AMD K10s, made between 2007 and 2011, 16
years ago and 12 years ago, respectively.

In the future, everyone involved with x86inc should consider dropping
REP_RETs altogether.
2023-02-01 04:23:55 +01:00

526 lines
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;******************************************************************************
;*
;* Copyright (c) 2000-2001 Fabrice Bellard <fabrice@bellard.org>
;* Copyright (c) Nick Kurshev <nickols_k@mail.ru>
;* Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at>
;* Copyright (c) 2002 Zdenek Kabelac <kabi@informatics.muni.cz>
;* Copyright (c) 2013 Daniel Kang
;*
;* SIMD-optimized halfpel functions
;*
;* 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_RODATA
cextern pb_1
cextern pw_2
pb_interleave16: db 0, 8, 1, 9, 2, 10, 3, 11, 4, 12, 5, 13, 6, 14, 7, 15
pb_interleave8: db 0, 4, 1, 5, 2, 6, 3, 7
cextern pw_8192
SECTION .text
; void ff_put_pixels8_x2(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int h)
%macro PUT_PIXELS8_X2 0
%if cpuflag(sse2)
cglobal put_pixels16_x2, 4,5,4
%else
cglobal put_pixels8_x2, 4,5
%endif
lea r4, [r2*2]
.loop:
movu m0, [r1+1]
movu m1, [r1+r2+1]
%if cpuflag(sse2)
movu m2, [r1]
movu m3, [r1+r2]
pavgb m0, m2
pavgb m1, m3
%else
PAVGB m0, [r1]
PAVGB m1, [r1+r2]
%endif
mova [r0], m0
mova [r0+r2], m1
add r1, r4
add r0, r4
movu m0, [r1+1]
movu m1, [r1+r2+1]
%if cpuflag(sse2)
movu m2, [r1]
movu m3, [r1+r2]
pavgb m0, m2
pavgb m1, m3
%else
PAVGB m0, [r1]
PAVGB m1, [r1+r2]
%endif
add r1, r4
mova [r0], m0
mova [r0+r2], m1
add r0, r4
sub r3d, 4
jne .loop
RET
%endmacro
INIT_MMX mmxext
PUT_PIXELS8_X2
; void ff_put_pixels16_x2(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int h)
%macro PUT_PIXELS_16 0
cglobal put_pixels16_x2, 4,5
lea r4, [r2*2]
.loop:
mova m0, [r1]
mova m1, [r1+r2]
mova m2, [r1+8]
mova m3, [r1+r2+8]
PAVGB m0, [r1+1]
PAVGB m1, [r1+r2+1]
PAVGB m2, [r1+9]
PAVGB m3, [r1+r2+9]
mova [r0], m0
mova [r0+r2], m1
mova [r0+8], m2
mova [r0+r2+8], m3
add r1, r4
add r0, r4
mova m0, [r1]
mova m1, [r1+r2]
mova m2, [r1+8]
mova m3, [r1+r2+8]
PAVGB m0, [r1+1]
PAVGB m1, [r1+r2+1]
PAVGB m2, [r1+9]
PAVGB m3, [r1+r2+9]
add r1, r4
mova [r0], m0
mova [r0+r2], m1
mova [r0+8], m2
mova [r0+r2+8], m3
add r0, r4
sub r3d, 4
jne .loop
RET
%endmacro
INIT_MMX mmxext
PUT_PIXELS_16
; The 8_X2 macro can easily be used here
INIT_XMM sse2
PUT_PIXELS8_X2
; void ff_put_no_rnd_pixels8_x2(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int h)
INIT_MMX mmxext
cglobal put_no_rnd_pixels8_x2, 4,5
mova m6, [pb_1]
lea r4, [r2*2]
.loop:
mova m0, [r1]
mova m2, [r1+r2]
mova m1, [r1+1]
mova m3, [r1+r2+1]
add r1, r4
psubusb m0, m6
psubusb m2, m6
PAVGB m0, m1
PAVGB m2, m3
mova [r0], m0
mova [r0+r2], m2
mova m0, [r1]
mova m1, [r1+1]
mova m2, [r1+r2]
mova m3, [r1+r2+1]
add r0, r4
add r1, r4
psubusb m0, m6
psubusb m2, m6
PAVGB m0, m1
PAVGB m2, m3
mova [r0], m0
mova [r0+r2], m2
add r0, r4
sub r3d, 4
jne .loop
RET
; void ff_put_pixels8_y2(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int h)
%macro PUT_PIXELS8_Y2 0
%if cpuflag(sse2)
cglobal put_pixels16_y2, 4,5,3
%else
cglobal put_pixels8_y2, 4,5
%endif
lea r4, [r2*2]
movu m0, [r1]
sub r0, r2
.loop:
movu m1, [r1+r2]
movu m2, [r1+r4]
add r1, r4
PAVGB m0, m1
PAVGB m1, m2
mova [r0+r2], m0
mova [r0+r4], m1
movu m1, [r1+r2]
movu m0, [r1+r4]
add r0, r4
add r1, r4
PAVGB m2, m1
PAVGB m1, m0
mova [r0+r2], m2
mova [r0+r4], m1
add r0, r4
sub r3d, 4
jne .loop
RET
%endmacro
INIT_MMX mmxext
PUT_PIXELS8_Y2
; actually, put_pixels16_y2_sse2
INIT_XMM sse2
PUT_PIXELS8_Y2
; void ff_put_no_rnd_pixels8_y2(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int h)
INIT_MMX mmxext
cglobal put_no_rnd_pixels8_y2, 4,5
mova m6, [pb_1]
lea r4, [r2+r2]
mova m0, [r1]
sub r0, r2
.loop:
mova m1, [r1+r2]
mova m2, [r1+r4]
add r1, r4
psubusb m1, m6
PAVGB m0, m1
PAVGB m1, m2
mova [r0+r2], m0
mova [r0+r4], m1
mova m1, [r1+r2]
mova m0, [r1+r4]
add r0, r4
add r1, r4
psubusb m1, m6
PAVGB m2, m1
PAVGB m1, m0
mova [r0+r2], m2
mova [r0+r4], m1
add r0, r4
sub r3d, 4
jne .loop
RET
; void ff_avg_pixels8_x2(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int h)
%macro AVG_PIXELS8_X2 0
%if cpuflag(sse2)
cglobal avg_pixels16_x2, 4,5,4
%else
cglobal avg_pixels8_x2, 4,5
%endif
lea r4, [r2*2]
.loop:
movu m0, [r1]
movu m2, [r1+r2]
%if cpuflag(sse2)
movu m1, [r1+1]
movu m3, [r1+r2+1]
pavgb m0, m1
pavgb m2, m3
%else
PAVGB m0, [r1+1], m3, m5
PAVGB m2, [r1+r2+1], m4, m5
%endif
PAVGB m0, [r0], m3, m5
PAVGB m2, [r0+r2], m4, m5
add r1, r4
mova [r0], m0
mova [r0+r2], m2
movu m0, [r1]
movu m2, [r1+r2]
%if cpuflag(sse2)
movu m1, [r1+1]
movu m3, [r1+r2+1]
pavgb m0, m1
pavgb m2, m3
%else
PAVGB m0, [r1+1], m3, m5
PAVGB m2, [r1+r2+1], m4, m5
%endif
add r0, r4
add r1, r4
PAVGB m0, [r0], m3, m5
PAVGB m2, [r0+r2], m4, m5
mova [r0], m0
mova [r0+r2], m2
add r0, r4
sub r3d, 4
jne .loop
RET
%endmacro
INIT_MMX mmxext
AVG_PIXELS8_X2
; actually avg_pixels16_x2
INIT_XMM sse2
AVG_PIXELS8_X2
; void ff_avg_pixels8_y2(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int h)
%macro AVG_PIXELS8_Y2 0
%if cpuflag(sse2)
cglobal avg_pixels16_y2, 4,5,3
%else
cglobal avg_pixels8_y2, 4,5
%endif
lea r4, [r2*2]
movu m0, [r1]
sub r0, r2
.loop:
movu m1, [r1+r2]
movu m2, [r1+r4]
add r1, r4
PAVGB m0, m1
PAVGB m1, m2
PAVGB m0, [r0+r2]
PAVGB m1, [r0+r4]
mova [r0+r2], m0
mova [r0+r4], m1
movu m1, [r1+r2]
movu m0, [r1+r4]
PAVGB m2, m1
PAVGB m1, m0
add r0, r4
add r1, r4
PAVGB m2, [r0+r2]
PAVGB m1, [r0+r4]
mova [r0+r2], m2
mova [r0+r4], m1
add r0, r4
sub r3d, 4
jne .loop
RET
%endmacro
INIT_MMX mmxext
AVG_PIXELS8_Y2
; actually avg_pixels16_y2
INIT_XMM sse2
AVG_PIXELS8_Y2
; void ff_avg_pixels8_xy2(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int h)
; Note this is not correctly rounded, and is therefore used for
; not-bitexact output
INIT_MMX mmxext
cglobal avg_approx_pixels8_xy2, 4,5
mova m6, [pb_1]
lea r4, [r2*2]
mova m0, [r1]
PAVGB m0, [r1+1]
.loop:
mova m2, [r1+r4]
mova m1, [r1+r2]
psubusb m2, m6
PAVGB m1, [r1+r2+1]
PAVGB m2, [r1+r4+1]
add r1, r4
PAVGB m0, m1
PAVGB m1, m2
PAVGB m0, [r0]
PAVGB m1, [r0+r2]
mova [r0], m0
mova [r0+r2], m1
mova m1, [r1+r2]
mova m0, [r1+r4]
PAVGB m1, [r1+r2+1]
PAVGB m0, [r1+r4+1]
add r0, r4
add r1, r4
PAVGB m2, m1
PAVGB m1, m0
PAVGB m2, [r0]
PAVGB m1, [r0+r2]
mova [r0], m2
mova [r0+r2], m1
add r0, r4
sub r3d, 4
jne .loop
RET
; void ff_avg_pixels16_xy2(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int h)
%macro SET_PIXELS_XY2 1
%if cpuflag(sse2)
cglobal %1_pixels16_xy2, 4,5,8
%else
cglobal %1_pixels8_xy2, 4,5
%endif
pxor m7, m7
mova m6, [pw_2]
movu m0, [r1]
movu m4, [r1+1]
mova m1, m0
mova m5, m4
punpcklbw m0, m7
punpcklbw m4, m7
punpckhbw m1, m7
punpckhbw m5, m7
paddusw m4, m0
paddusw m5, m1
xor r4, r4
add r1, r2
.loop:
movu m0, [r1+r4]
movu m2, [r1+r4+1]
mova m1, m0
mova m3, m2
punpcklbw m0, m7
punpcklbw m2, m7
punpckhbw m1, m7
punpckhbw m3, m7
paddusw m0, m2
paddusw m1, m3
paddusw m4, m6
paddusw m5, m6
paddusw m4, m0
paddusw m5, m1
psrlw m4, 2
psrlw m5, 2
%ifidn %1, avg
mova m3, [r0+r4]
packuswb m4, m5
PAVGB m4, m3
%else
packuswb m4, m5
%endif
mova [r0+r4], m4
add r4, r2
movu m2, [r1+r4]
movu m4, [r1+r4+1]
mova m3, m2
mova m5, m4
punpcklbw m2, m7
punpcklbw m4, m7
punpckhbw m3, m7
punpckhbw m5, m7
paddusw m4, m2
paddusw m5, m3
paddusw m0, m6
paddusw m1, m6
paddusw m0, m4
paddusw m1, m5
psrlw m0, 2
psrlw m1, 2
%ifidn %1, avg
mova m3, [r0+r4]
packuswb m0, m1
PAVGB m0, m3
%else
packuswb m0, m1
%endif
mova [r0+r4], m0
add r4, r2
sub r3d, 2
jnz .loop
RET
%endmacro
INIT_MMX mmxext
SET_PIXELS_XY2 avg
INIT_XMM sse2
SET_PIXELS_XY2 put
SET_PIXELS_XY2 avg
%macro SSSE3_PIXELS_XY2 1-2
%if %0 == 2 ; sse2
cglobal %1_pixels16_xy2, 4,5,%2
mova m4, [pb_interleave16]
%else
cglobal %1_pixels8_xy2, 4,5
mova m4, [pb_interleave8]
%endif
mova m5, [pb_1]
movu m0, [r1]
movu m1, [r1+1]
pmaddubsw m0, m5
pmaddubsw m1, m5
xor r4, r4
add r1, r2
.loop:
movu m2, [r1+r4]
movu m3, [r1+r4+1]
pmaddubsw m2, m5
pmaddubsw m3, m5
paddusw m0, m2
paddusw m1, m3
pmulhrsw m0, [pw_8192]
pmulhrsw m1, [pw_8192]
%ifidn %1, avg
mova m6, [r0+r4]
packuswb m0, m1
pshufb m0, m4
pavgb m0, m6
%else
packuswb m0, m1
pshufb m0, m4
%endif
mova [r0+r4], m0
add r4, r2
movu m0, [r1+r4]
movu m1, [r1+r4+1]
pmaddubsw m0, m5
pmaddubsw m1, m5
paddusw m2, m0
paddusw m3, m1
pmulhrsw m2, [pw_8192]
pmulhrsw m3, [pw_8192]
%ifidn %1, avg
mova m6, [r0+r4]
packuswb m2, m3
pshufb m2, m4
pavgb m2, m6
%else
packuswb m2, m3
pshufb m2, m4
%endif
mova [r0+r4], m2
add r4, r2
sub r3d, 2
jnz .loop
RET
%endmacro
INIT_MMX ssse3
SSSE3_PIXELS_XY2 put
SSSE3_PIXELS_XY2 avg
INIT_XMM ssse3
SSSE3_PIXELS_XY2 put, 6
SSSE3_PIXELS_XY2 avg, 7
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