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/*
* Copyright (c) 2011 Mans Rullgard <mans@mansr.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 "asm.S"
preserve8
.macro prerot dst, rt
lsr r3, r6, #2 @ n4
add \rt, r4, r6, lsr #1 @ revtab + n4
add r9, r3, r3, lsl #1 @ n3
add r8, r7, r6 @ tcos + n4
add r3, r2, r6, lsr #1 @ in + n4
add r9, r2, r9, lsl #1 @ in + n3
sub r8, r8, #16
sub r10, r3, #16
sub r11, r9, #16
mov r12, #-16
1:
vld2.16 {d0,d1}, [r9, :128]!
vld2.16 {d2,d3}, [r11,:128], r12
vld2.16 {d4,d5}, [r3, :128]!
vld2.16 {d6,d7}, [r10,:128], r12
vld2.16 {d16,d17},[r7, :128]! @ cos, sin
vld2.16 {d18,d19},[r8, :128], r12
vrev64.16 q1, q1
vrev64.16 q3, q3
vrev64.16 q9, q9
vneg.s16 d0, d0
vneg.s16 d2, d2
vneg.s16 d16, d16
vneg.s16 d18, d18
vhsub.s16 d0, d0, d3 @ re
vhsub.s16 d4, d7, d4 @ im
vhsub.s16 d6, d6, d5
vhsub.s16 d2, d2, d1
vmull.s16 q10, d0, d16
vmlsl.s16 q10, d4, d17
vmull.s16 q11, d0, d17
vmlal.s16 q11, d4, d16
vmull.s16 q12, d6, d18
vmlsl.s16 q12, d2, d19
vmull.s16 q13, d6, d19
vmlal.s16 q13, d2, d18
vshrn.s32 d0, q10, #15
vshrn.s32 d1, q11, #15
vshrn.s32 d2, q12, #15
vshrn.s32 d3, q13, #15
vzip.16 d0, d1
vzip.16 d2, d3
ldrh lr, [r4], #2
ldrh r2, [\rt, #-2]!
add lr, \dst, lr, lsl #2
add r2, \dst, r2, lsl #2
vst1.32 {d0[0]}, [lr,:32]
vst1.32 {d2[0]}, [r2,:32]
ldrh lr, [r4], #2
ldrh r2, [\rt, #-2]!
add lr, \dst, lr, lsl #2
add r2, \dst, r2, lsl #2
vst1.32 {d0[1]}, [lr,:32]
vst1.32 {d2[1]}, [r2,:32]
ldrh lr, [r4], #2
ldrh r2, [\rt, #-2]!
add lr, \dst, lr, lsl #2
add r2, \dst, r2, lsl #2
vst1.32 {d1[0]}, [lr,:32]
vst1.32 {d3[0]}, [r2,:32]
ldrh lr, [r4], #2
ldrh r2, [\rt, #-2]!
add lr, \dst, lr, lsl #2
add r2, \dst, r2, lsl #2
vst1.32 {d1[1]}, [lr,:32]
vst1.32 {d3[1]}, [r2,:32]
subs r6, r6, #32
bgt 1b
.endm
function ff_mdct_fixed_calc_neon, export=1
push {r1,r4-r11,lr}
ldr r4, [r0, #8] @ revtab
ldr r6, [r0, #16] @ mdct_size; n
ldr r7, [r0, #24] @ tcos
prerot r1, r5
mov r4, r0
bl X(ff_fft_fixed_calc_neon)
pop {r5}
mov r12, #-16
ldr r6, [r4, #16] @ mdct_size; n
ldr r7, [r4, #24] @ tcos
add r5, r5, r6, lsr #1
add r7, r7, r6, lsr #1
sub r1, r5, #16
sub r2, r7, #16
1:
vld2.16 {d4,d5}, [r7,:128]!
vld2.16 {d6,d7}, [r2,:128], r12
vld2.16 {d0,d1}, [r5,:128]
vld2.16 {d2,d3}, [r1,:128]
vrev64.16 q3, q3
vrev64.16 q1, q1
vneg.s16 q3, q3
vneg.s16 q2, q2
vmull.s16 q11, d2, d6
vmlal.s16 q11, d3, d7
vmull.s16 q8, d0, d5
vmlsl.s16 q8, d1, d4
vmull.s16 q9, d0, d4
vmlal.s16 q9, d1, d5
vmull.s16 q10, d2, d7
vmlsl.s16 q10, d3, d6
vshrn.s32 d0, q11, #15
vshrn.s32 d1, q8, #15
vshrn.s32 d2, q9, #15
vshrn.s32 d3, q10, #15
vrev64.16 q0, q0
vst2.16 {d2,d3}, [r5,:128]!
vst2.16 {d0,d1}, [r1,:128], r12
subs r6, r6, #32
bgt 1b
pop {r4-r11,pc}
endfunc
function ff_mdct_fixed_calcw_neon, export=1
push {r1,r4-r11,lr}
ldrd r4, r5, [r0, #8] @ revtab, tmp_buf
ldr r6, [r0, #16] @ mdct_size; n
ldr r7, [r0, #24] @ tcos
prerot r5, r1
mov r4, r0
mov r1, r5
bl X(ff_fft_fixed_calc_neon)
pop {r7}
mov r12, #-16
ldr r6, [r4, #16] @ mdct_size; n
ldr r9, [r4, #24] @ tcos
add r5, r5, r6, lsr #1
add r7, r7, r6
add r9, r9, r6, lsr #1
sub r3, r5, #16
sub r1, r7, #16
sub r2, r9, #16
1:
vld2.16 {d4,d5}, [r9,:128]!
vld2.16 {d6,d7}, [r2,:128], r12
vld2.16 {d0,d1}, [r5,:128]!
vld2.16 {d2,d3}, [r3,:128], r12
vrev64.16 q3, q3
vrev64.16 q1, q1
vneg.s16 q3, q3
vneg.s16 q2, q2
vmull.s16 q8, d2, d6
vmlal.s16 q8, d3, d7
vmull.s16 q9, d0, d5
vmlsl.s16 q9, d1, d4
vmull.s16 q10, d0, d4
vmlal.s16 q10, d1, d5
vmull.s16 q11, d2, d7
vmlsl.s16 q11, d3, d6
vrev64.32 q8, q8
vrev64.32 q9, q9
vst2.32 {q10,q11},[r7,:128]!
vst2.32 {d16,d18},[r1,:128], r12
vst2.32 {d17,d19},[r1,:128], r12
subs r6, r6, #32
bgt 1b
pop {r4-r11,pc}
endfunc
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