/*
* ARM NEON optimised MDCT
* Copyright (c) 2009 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"
#define ff_fft_calc_neon X(ff_fft_calc_neon)
function ff_imdct_half_neon, export=1
push {r4-r8,lr}
mov r12, #1
ldr lr, [r0, #20] @ mdct_bits
ldr r4, [r0, #24] @ tcos
ldr r3, [r0, #8] @ revtab
lsl r12, r12, lr @ n = 1 << nbits
lsr lr, r12, #2 @ n4 = n >> 2
add r7, r2, r12, lsl #1
mov r12, #-16
sub r7, r7, #16
vld2.32 {d16-d17},[r7,:128],r12 @ d16=x,n1 d17=x,n0
vld2.32 {d0-d1}, [r2,:128]! @ d0 =m0,x d1 =m1,x
vrev64.32 d17, d17
vld2.32 {d2,d3}, [r4,:128]! @ d2=c0,c1 d3=s0,s2
vmul.f32 d6, d17, d2
vmul.f32 d7, d0, d2
1:
subs lr, lr, #2
ldr r6, [r3], #4
vmul.f32 d4, d0, d3
vmul.f32 d5, d17, d3
vsub.f32 d4, d6, d4
vadd.f32 d5, d5, d7
uxth r8, r6, ror #16
uxth r6, r6
add r8, r1, r8, lsl #3
add r6, r1, r6, lsl #3
beq 1f
vld2.32 {d16-d17},[r7,:128],r12
vld2.32 {d0-d1}, [r2,:128]!
vrev64.32 d17, d17
vld2.32 {d2,d3}, [r4,:128]! @ d2=c0,c1 d3=s0,s2
vmul.f32 d6, d17, d2
vmul.f32 d7, d0, d2
vst2.32 {d4[0],d5[0]}, [r6,:64]
vst2.32 {d4[1],d5[1]}, [r8,:64]
b 1b
1:
vst2.32 {d4[0],d5[0]}, [r6,:64]
vst2.32 {d4[1],d5[1]}, [r8,:64]
mov r4, r0
mov r6, r1
bl ff_fft_calc_neon
mov r12, #1
ldr lr, [r4, #20] @ mdct_bits
ldr r4, [r4, #24] @ tcos
lsl r12, r12, lr @ n = 1 << nbits
lsr lr, r12, #3 @ n8 = n >> 3
add r4, r4, lr, lsl #3
add r6, r6, lr, lsl #3
sub r1, r4, #16
sub r3, r6, #16
mov r7, #-16
mov r8, r6
mov r0, r3
vld2.32 {d0-d1}, [r3,:128], r7 @ d0 =i1,r1 d1 =i0,r0
vld2.32 {d20-d21},[r6,:128]! @ d20=i2,r2 d21=i3,r3
vld2.32 {d16,d18},[r1,:128], r7 @ d16=c1,c0 d18=s1,s0
1:
subs lr, lr, #2
vmul.f32 d7, d0, d18
vld2.32 {d17,d19},[r4,:128]! @ d17=c2,c3 d19=s2,s3
vmul.f32 d4, d1, d18
vmul.f32 d5, d21, d19
vmul.f32 d6, d20, d19
vmul.f32 d22, d1, d16
vmul.f32 d23, d21, d17
vmul.f32 d24, d0, d16
vmul.f32 d25, d20, d17
vadd.f32 d7, d7, d22
vadd.f32 d6, d6, d23
vsub.f32 d4, d4, d24
vsub.f32 d5, d5, d25
beq 1f
vld2.32 {d0-d1}, [r3,:128], r7
vld2.32 {d20-d21},[r6,:128]!
vld2.32 {d16,d18},[r1,:128], r7 @ d16=c1,c0 d18=s1,s0
vrev64.32 q3, q3
vst2.32 {d4,d6}, [r0,:128], r7
vst2.32 {d5,d7}, [r8,:128]!
b 1b
1:
vrev64.32 q3, q3
vst2.32 {d4,d6}, [r0,:128]
vst2.32 {d5,d7}, [r8,:128]
pop {r4-r8,pc}
endfunc
function ff_imdct_calc_neon, export=1
push {r4-r6,lr}
ldr r3, [r0, #20]
mov r4, #1
mov r5, r1
lsl r4, r4, r3
add r1, r1, r4
bl ff_imdct_half_neon
add r0, r5, r4, lsl #2
add r1, r5, r4, lsl #1
sub r0, r0, #8
sub r2, r1, #16
mov r3, #-16
mov r6, #-8
vmov.i32 d30, #1<<31
1:
vld1.32 {d0-d1}, [r2,:128], r3
pld [r0, #-16]
vrev64.32 q0, q0
vld1.32 {d2-d3}, [r1,:128]!
veor d4, d1, d30
pld [r2, #-16]
vrev64.32 q1, q1
veor d5, d0, d30
vst1.32 {d2}, [r0,:64], r6
vst1.32 {d3}, [r0,:64], r6
vst1.32 {d4-d5}, [r5,:128]!
subs r4, r4, #16
bgt 1b
pop {r4-r6,pc}
endfunc
function ff_mdct_calc_neon, export=1
push {r4-r10,lr}
mov r12, #1
ldr lr, [r0, #20] @ mdct_bits
ldr r4, [r0, #24] @ tcos
ldr r3, [r0, #8] @ revtab
lsl lr, r12, lr @ n = 1 << nbits
add r7, r2, lr @ in4u
sub r9, r7, #16 @ in4d
add r2, r7, lr, lsl #1 @ in3u
add r8, r9, lr, lsl #1 @ in3d
add r5, r4, lr, lsl #1
sub r5, r5, #16
sub r3, r3, #4
mov r12, #-16
vld2.32 {d16,d18},[r9,:128],r12 @ in0u0,in0u1 in4d1,in4d0
vld2.32 {d17,d19},[r8,:128],r12 @ in2u0,in2u1 in3d1,in3d0
vld2.32 {d0, d2}, [r7,:128]! @ in4u0,in4u1 in2d1,in2d0
vrev64.32 q9, q9 @ in4d0,in4d1 in3d0,in3d1
vld2.32 {d1, d3}, [r2,:128]! @ in3u0,in3u1 in1d1,in1d0
vsub.f32 d0, d18, d0 @ in4d-in4u I
vld2.32 {d20,d21},[r4,:128]! @ c0,c1 s0,s1
vrev64.32 q1, q1 @ in2d0,in2d1 in1d0,in1d1
vld2.32 {d30,d31},[r5,:128],r12 @ c2,c3 s2,s3
vadd.f32 d1, d1, d19 @ in3u+in3d -R
vsub.f32 d16, d16, d2 @ in0u-in2d R
vadd.f32 d17, d17, d3 @ in2u+in1d -I
1:
vmul.f32 d7, d0, d21 @ I*s
A ldr r10, [r3, lr, lsr #1]
T lsr r10, lr, #1
T ldr r10, [r3, r10]
vmul.f32 d6, d1, d20 @ -R*c
ldr r6, [r3, #4]!
vmul.f32 d4, d1, d21 @ -R*s
vmul.f32 d5, d0, d20 @ I*c
vmul.f32 d24, d16, d30 @ R*c
vmul.f32 d25, d17, d31 @ -I*s
vmul.f32 d22, d16, d31 @ R*s
vmul.f32 d23, d17, d30 @ I*c
subs lr, lr, #16
vsub.f32 d6, d6, d7 @ -R*c-I*s
vadd.f32 d7, d4, d5 @ -R*s+I*c
vsub.f32 d24, d25, d24 @ I*s-R*c
vadd.f32 d25, d22, d23 @ R*s-I*c
beq 1f
mov r12, #-16
vld2.32 {d16,d18},[r9,:128],r12 @ in0u0,in0u1 in4d1,in4d0
vld2.32 {d17,d19},[r8,:128],r12 @ in2u0,in2u1 in3d1,in3d0
vneg.f32 d7, d7 @ R*s-I*c
vld2.32 {d0, d2}, [r7,:128]! @ in4u0,in4u1 in2d1,in2d0
vrev64.32 q9, q9 @ in4d0,in4d1 in3d0,in3d1
vld2.32 {d1, d3}, [r2,:128]! @ in3u0,in3u1 in1d1,in1d0
vsub.f32 d0, d18, d0 @ in4d-in4u I
vld2.32 {d20,d21},[r4,:128]! @ c0,c1 s0,s1
vrev64.32 q1, q1 @ in2d0,in2d1 in1d0,in1d1
vld2.32 {d30,d31},[r5,:128],r12 @ c2,c3 s2,s3
vadd.f32 d1, d1, d19 @ in3u+in3d -R
vsub.f32 d16, d16, d2 @ in0u-in2d R
vadd.f32 d17, d17, d3 @ in2u+in1d -I
uxth r12, r6, ror #16
uxth r6, r6
add r12, r1, r12, lsl #3
add r6, r1, r6, lsl #3
vst2.32 {d6[0],d7[0]}, [r6,:64]
vst2.32 {d6[1],d7[1]}, [r12,:64]
uxth r6, r10, ror #16
uxth r10, r10
add r6 , r1, r6, lsl #3
add r10, r1, r10, lsl #3
vst2.32 {d24[0],d25[0]},[r10,:64]
vst2.32 {d24[1],d25[1]},[r6,:64]
b 1b
1:
vneg.f32 d7, d7 @ R*s-I*c
uxth r12, r6, ror #16
uxth r6, r6
add r12, r1, r12, lsl #3
add r6, r1, r6, lsl #3
vst2.32 {d6[0],d7[0]}, [r6,:64]
vst2.32 {d6[1],d7[1]}, [r12,:64]
uxth r6, r10, ror #16
uxth r10, r10
add r6 , r1, r6, lsl #3
add r10, r1, r10, lsl #3
vst2.32 {d24[0],d25[0]},[r10,:64]
vst2.32 {d24[1],d25[1]},[r6,:64]
mov r4, r0
mov r6, r1
bl ff_fft_calc_neon
mov r12, #1
ldr lr, [r4, #20] @ mdct_bits
ldr r4, [r4, #24] @ tcos
lsl r12, r12, lr @ n = 1 << nbits
lsr lr, r12, #3 @ n8 = n >> 3
add r4, r4, lr, lsl #3
add r6, r6, lr, lsl #3
sub r1, r4, #16
sub r3, r6, #16
mov r7, #-16
mov r8, r6
mov r0, r3
vld2.32 {d0-d1}, [r3,:128], r7 @ d0 =r1,i1 d1 =r0,i0
vld2.32 {d20-d21},[r6,:128]! @ d20=r2,i2 d21=r3,i3
vld2.32 {d16,d18},[r1,:128], r7 @ c1,c0 s1,s0
1:
subs lr, lr, #2
vmul.f32 d7, d0, d18 @ r1*s1,r0*s0
vld2.32 {d17,d19},[r4,:128]! @ c2,c3 s2,s3
vmul.f32 d4, d1, d18 @ i1*s1,i0*s0
vmul.f32 d5, d21, d19 @ i2*s2,i3*s3
vmul.f32 d6, d20, d19 @ r2*s2,r3*s3
vmul.f32 d24, d0, d16 @ r1*c1,r0*c0
vmul.f32 d25, d20, d17 @ r2*c2,r3*c3
vmul.f32 d22, d21, d17 @ i2*c2,i3*c3
vmul.f32 d23, d1, d16 @ i1*c1,i0*c0
vadd.f32 d4, d4, d24 @ i1*s1+r1*c1,i0*s0+r0*c0
vadd.f32 d5, d5, d25 @ i2*s2+r2*c2,i3*s3+r3*c3
vsub.f32 d6, d22, d6 @ i2*c2-r2*s2,i3*c3-r3*s3
vsub.f32 d7, d23, d7 @ i1*c1-r1*s1,i0*c0-r0*s0
vneg.f32 q2, q2
beq 1f
vld2.32 {d0-d1}, [r3,:128], r7
vld2.32 {d20-d21},[r6,:128]!
vld2.32 {d16,d18},[r1,:128], r7 @ c1,c0 s1,s0
vrev64.32 q3, q3
vst2.32 {d4,d6}, [r0,:128], r7
vst2.32 {d5,d7}, [r8,:128]!
b 1b
1:
vrev64.32 q3, q3
vst2.32 {d4,d6}, [r0,:128]
vst2.32 {d5,d7}, [r8,:128]
pop {r4-r10,pc}
endfunc