/*
* Copyright (c) 2010 Mans Rullgard <mans@mansr.com>
*
* 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/arm/asm.S"
function ff_synth_filter_float_neon, export=1
push {r3-r11,lr}
ldr r4, [r2] @ synth_buf_offset
add r1, r1, r4, lsl #2 @ synth_buf
sub r12, r4, #32
bfc r12, #9, #23
bic r4, r4, #63
str r12, [r2]
ldr r2, [sp, #12*4] @ in
mov r9, r1 @ synth_buf
VFP vpush {d0}
bl X(ff_imdct_half_neon)
VFP vpop {d0}
pop {r3}
ldr r5, [sp, #9*4] @ window
ldr r2, [sp, #10*4] @ out
NOVFP vldr s0, [sp, #12*4] @ scale
add r8, r9, #12*4
mov lr, #64*4
mov r1, #4
1:
add r10, r9, #16*4 @ synth_buf
add r11, r8, #16*4
add r0, r5, #16*4 @ window
add r6, r5, #32*4
add r7, r5, #48*4
vld1.32 {q10}, [r3,:128] @ a
add r3, r3, #16*4
vld1.32 {q1}, [r3,:128] @ b
vmov.f32 q2, #0.0 @ c
vmov.f32 q3, #0.0 @ d
mov r12, #512
2:
vld1.32 {q9}, [r8, :128], lr
vrev64.32 q9, q9
vld1.32 {q8}, [r5, :128], lr
vmls.f32 d20, d16, d19
vld1.32 {q11}, [r0, :128], lr
vmls.f32 d21, d17, d18
vld1.32 {q12}, [r9, :128], lr
vmla.f32 d2, d22, d24
vld1.32 {q8}, [r6, :128], lr
vmla.f32 d3, d23, d25
vld1.32 {q9}, [r10,:128], lr
vmla.f32 d4, d16, d18
vld1.32 {q12}, [r11,:128], lr
vmla.f32 d5, d17, d19
vrev64.32 q12, q12
vld1.32 {q11}, [r7, :128], lr
vmla.f32 d6, d22, d25
vmla.f32 d7, d23, d24
subs r12, r12, #64
beq 3f
cmp r12, r4
bne 2b
sub r8, r8, #512*4
sub r9, r9, #512*4
sub r10, r10, #512*4
sub r11, r11, #512*4
b 2b
3:
vmul.f32 q8, q10, d0[0]
vmul.f32 q9, q1, d0[0]
vst1.32 {q3}, [r3,:128]
sub r3, r3, #16*4
vst1.32 {q2}, [r3,:128]
vst1.32 {q8}, [r2,:128]
add r2, r2, #16*4
vst1.32 {q9}, [r2,:128]
subs r1, r1, #1
it eq
popeq {r4-r11,pc}
cmp r4, #0
itt eq
subeq r8, r8, #512*4
subeq r9, r9, #512*4
sub r5, r5, #512*4
sub r2, r2, #12*4 @ out
add r3, r3, #4*4 @ synth_buf2
add r5, r5, #4*4 @ window
add r9, r9, #4*4 @ synth_buf
sub r8, r8, #4*4 @ synth_buf
b 1b
endfunc