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ARM: faster NEON IMDCT

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Originally committed as revision 19817 to svn://svn.ffmpeg.org/ffmpeg/trunk
release/0.6
Måns Rullgård 16 years ago
parent 61d00297ab
commit 750f5034cf
1 changed files with 17 additions and 29 deletions
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  1. 46
      libavcodec/arm/mdct_neon.S

46
libavcodec/arm/mdct_neon.S
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@ -38,30 +38,28 @@ function ff_imdct_half_neon, export=1
mov r12, #-16
sub r7, r7, #16
vld1.32 {d16-d17},[r7,:128],r12 @ d16=x,n1 d17=x,n0
vld1.32 {d0-d1}, [r2,:128]! @ d0 =m0,x d1 =m1,x
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
vld1.32 {d2}, [r4,:64]! @ d2=c0,c1
vmul.f32 d6, d17, d2
vld1.32 {d3}, [r5,:64]! @ d3=s0,s1
vuzp.32 d17, d16
vuzp.32 d0, d1
vmul.f32 d6, d16, d2
vmul.f32 d7, d0, d2
1:
subs lr, lr, #2
ldr r6, [r3], #4
vmul.f32 d4, d0, d3
vmul.f32 d5, d16, d3
vmul.f32 d5, d17, d3
vsub.f32 d4, d6, d4
vadd.f32 d5, d5, d7
uxtah r8, r1, r6, ror #16
uxtah r6, r1, r6
beq 1f
vld1.32 {d16-d17},[r7,:128],r12
vld1.32 {d0-d1}, [r2,:128]!
vuzp.32 d17, d16
vld2.32 {d16-d17},[r7,:128],r12
vld2.32 {d0-d1}, [r2,:128]!
vrev64.32 d17, d17
vld1.32 {d2}, [r4,:64]!
vuzp.32 d0, d1
vmul.f32 d6, d16, d2
vmul.f32 d6, d17, d2
vld1.32 {d3}, [r5,:64]!
vmul.f32 d7, d0, d2
vst2.32 {d4[0],d5[0]}, [r6,:64]
@ -95,11 +93,9 @@ function ff_imdct_half_neon, export=1
mov r8, r6
mov r0, r3
vld1.32 {d0-d1}, [r3,:128], r7 @ d0 =i1,r1 d1 =i0,r0
vld1.32 {d20-d21},[r6,:128]! @ d20=i2,r2 d21=i3,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
vld1.32 {d18}, [r2,:64], r12 @ d18=s1,s0
vuzp.32 d20, d21
vuzp.32 d0, d1
1:
subs lr, lr, #2
vmul.f32 d7, d0, d18
@ -118,25 +114,17 @@ function ff_imdct_half_neon, export=1
vsub.f32 d4, d4, d24
vsub.f32 d5, d5, d25
beq 1f
vld1.32 {d0-d1}, [r3,:128], r7
vld1.32 {d20-d21},[r6,:128]!
vld2.32 {d0-d1}, [r3,:128], r7
vld2.32 {d20-d21},[r6,:128]!
vld1.32 {d18}, [r2,:64], r12
vuzp.32 d20, d21
vuzp.32 d0, d1
vrev64.32 q3, q3
vtrn.32 d4, d6
vtrn.32 d5, d7
vswp d5, d6
vst1.32 {d4-d5}, [r0,:128], r7
vst1.32 {d6-d7}, [r8,:128]!
vst2.32 {d4,d6}, [r0,:128], r7
vst2.32 {d5,d7}, [r8,:128]!
b 1b
1:
vrev64.32 q3, q3
vtrn.32 d4, d6
vtrn.32 d5, d7
vswp d5, d6
vst1.32 {d4-d5}, [r0,:128]
vst1.32 {d6-d7}, [r8,:128]
vst2.32 {d4,d6}, [r0,:128]
vst2.32 {d5,d7}, [r8,:128]
pop {r4-r8,pc}
.endfunc

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