mirror of https://git.ffmpeg.org/ffmpeg.git
144 lines
4.9 KiB
ArmAsm
144 lines
4.9 KiB
ArmAsm
/*
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* Copyright (c) 2011 Mans Rullgard <mans@mansr.com>
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/arm/asm.S"
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.macro skip args:vararg
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.endm
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.macro sum8 lo, hi, w, p, t1, t2, t3, t4, rsb=skip, offs=0
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ldr \t1, [\w, #4*\offs]
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ldr \t2, [\p, #4]!
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\rsb \t1, \t1, #0
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.irpc i, 135
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ldr \t3, [\w, #4*64*\i+4*\offs]
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ldr \t4, [\p, #4*64*\i]
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smlal \lo, \hi, \t1, \t2
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\rsb \t3, \t3, #0
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ldr \t1, [\w, #4*64*(\i+1)+4*\offs]
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ldr \t2, [\p, #4*64*(\i+1)]
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smlal \lo, \hi, \t3, \t4
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\rsb \t1, \t1, #0
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.endr
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ldr \t3, [\w, #4*64*7+4*\offs]
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ldr \t4, [\p, #4*64*7]
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smlal \lo, \hi, \t1, \t2
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\rsb \t3, \t3, #0
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smlal \lo, \hi, \t3, \t4
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.endm
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.macro round rd, lo, hi
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lsr \rd, \lo, #24
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bic \lo, \lo, #0xff000000
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orr \rd, \rd, \hi, lsl #8
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mov \hi, #0
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ssat \rd, #16, \rd
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.endm
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function ff_mpadsp_apply_window_fixed_armv6, export=1
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push {r2,r4-r11,lr}
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add r4, r0, #4*512 @ synth_buf + 512
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.rept 4
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ldm r0!, {r5-r12}
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stm r4!, {r5-r12}
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.endr
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ldr r4, [sp, #40] @ incr
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sub r0, r0, #4*17 @ synth_buf + 16
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ldr r8, [r2] @ sum:low
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add r2, r0, #4*32 @ synth_buf + 48
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rsb r5, r4, r4, lsl #5 @ 31 * incr
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lsl r4, r4, #1
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asr r9, r8, #31 @ sum:high
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add r5, r3, r5, lsl #1 @ samples2
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add r6, r1, #4*32 @ w2
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str r4, [sp, #40]
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sum8 r8, r9, r1, r0, r10, r11, r12, lr
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sum8 r8, r9, r1, r2, r10, r11, r12, lr, rsb, 32
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round r10, r8, r9
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strh_post r10, r3, r4
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mov lr, #15
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1:
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ldr r12, [r0, #4]!
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ldr r11, [r6, #-4]!
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ldr r10, [r1, #4]!
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.irpc i, 0246
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.if \i
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ldr r11, [r6, #4*64*\i]
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ldr r10, [r1, #4*64*\i]
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.endif
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rsb r11, r11, #0
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smlal r8, r9, r10, r12
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ldr r10, [r0, #4*64*(\i+1)]
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.ifeq \i
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smull r4, r7, r11, r12
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.else
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smlal r4, r7, r11, r12
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.endif
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ldr r11, [r6, #4*64*(\i+1)]
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ldr r12, [r1, #4*64*(\i+1)]
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rsb r11, r11, #0
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smlal r8, r9, r12, r10
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.iflt \i-6
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ldr r12, [r0, #4*64*(\i+2)]
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.else
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ldr r12, [r2, #-4]!
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.endif
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smlal r4, r7, r11, r10
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.endr
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.irpc i, 0246
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ldr r10, [r1, #4*64*\i+4*32]
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rsb r12, r12, #0
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ldr r11, [r6, #4*64*\i+4*32]
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smlal r8, r9, r10, r12
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ldr r10, [r2, #4*64*(\i+1)]
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smlal r4, r7, r11, r12
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ldr r12, [r1, #4*64*(\i+1)+4*32]
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rsb r10, r10, #0
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ldr r11, [r6, #4*64*(\i+1)+4*32]
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smlal r8, r9, r12, r10
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.iflt \i-6
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ldr r12, [r2, #4*64*(\i+2)]
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.else
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ldr r12, [sp, #40]
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.endif
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smlal r4, r7, r11, r10
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.endr
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round r10, r8, r9
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adds r8, r8, r4
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adc r9, r9, r7
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strh_post r10, r3, r12
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round r11, r8, r9
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subs lr, lr, #1
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strh_dpost r11, r5, r12
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bgt 1b
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sum8 r8, r9, r1, r0, r10, r11, r12, lr, rsb, 33
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pop {r4}
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round r10, r8, r9
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str r8, [r4]
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strh r10, [r3]
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pop {r4-r11,pc}
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endfunc
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