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ARM: merge two loops in ff_mdct_calc_neon 

Originally committed as revision 19941 to svn://svn.ffmpeg.org/ffmpeg/trunk
tags/v0.6
Måns Rullgård 16 years ago
parent
f7a3b6030c
commit
d650574e68
1 changed files with 58 additions and 68 deletions
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  1. +58
    -68
      libavcodec/arm/mdct_neon.S

+ 58
- 68
libavcodec/arm/mdct_neon.S View File

@@ -169,91 +169,81 @@ function ff_mdct_calc_neon, export=1
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 @ x,x in4d1,in4d0
vld2.32 {d17,d19},[r8,:128],r12 @ x,x in3d1,in3d0
vld2.32 {d20,d21},[r7,:128]! @ in4u0,in4u1 x,x
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 {d0, d1}, [r2,:128]! @ in3u0,in3u1 x,x
vsub.f32 d20, d18, d20 @ in4d-in4u I
vld2.32 {d2,d3}, [r4,:128]! @ c0,c1 s0,s1
vadd.f32 d0, d0, d19 @ in3u+in3d -R
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, d20, d3 @ I*s
vmul.f32 d6, d0, d2 @ -R*c
ldr r6, [r3], #4
vmul.f32 d4, d0, d3 @ -R*s
vmul.f32 d5, d20, d2 @ I*c
vmul.f32 d7, d0, d21 @ I*s
ldr r10, [r3, lr, lsr #1]
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
uxth r10, r6, ror #16
uxth r6, r6
add r10, r1, r10, lsl #3
add r6, r1, r6, lsl #3
vsub.f32 d24, d25, d24 @ I*s-R*c
vadd.f32 d25, d22, d23 @ R*s-I*c
beq 1f
vld2.32 {d16,d18},[r9,:128],r12 @ x,x in4d1,in4d0
vld2.32 {d17,d19},[r8,:128],r12 @ x,x in3d1,in3d0
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 {d20,d21},[r7,:128]! @ in4u0,in4u1 x,x
vld2.32 {d0, d2}, [r7,:128]! @ in4u0,in4u1 in2d1,in2d0
vrev64.32 q9, q9 @ in4d0,in4d1 in3d0,in3d1
vld2.32 {d0, d1}, [r2,:128]! @ in3u0,in3u1 x,x
vsub.f32 d20, d18, d20 @ in4d-in4u I
vld2.32 {d2,d3}, [r4,:128]! @ c0,c1 s0,s1
vadd.f32 d0, d0, d19 @ in3u+in3d -R
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]}, [r10,: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
vst2.32 {d6[0],d7[0]}, [r6,:64]
vst2.32 {d6[1],d7[1]}, [r10,:64]

mov r12, #1
ldr lr, [r0, #28] @ mdct_bits
lsl lr, r12, lr @ n = 1 << nbits
sub r8, r2, #16 @ in1d
add r2, r9, #16 @ in0u
sub r9, r7, #16 @ in2d
mov r12, #-16

vld2.32 {d16,d18},[r9,:128],r12 @ x,x in2d1,in2d0
vld2.32 {d17,d19},[r8,:128],r12 @ x,x in1d1,in1d0
vld2.32 {d20,d21},[r7,:128]! @ in2u0,in2u1 x,x
vrev64.32 q9, q9 @ in2d0,in2d1 in1d0,in1d1
vld2.32 {d0, d1}, [r2,:128]! @ in0u0,in0u1 x,x
vsub.f32 d0, d0, d18 @ in0u-in2d R
vld2.32 {d2,d3}, [r4,:128]! @ c0,c1 s0,s1
vadd.f32 d20, d20, d19 @ in2u+in1d -I
1:
vmul.f32 d6, d0, d2 @ R*c
vmul.f32 d7, d20, d3 @ -I*s
ldr r6, [r3], #4
vmul.f32 d4, d0, d3 @ R*s
vmul.f32 d5, d20, d2 @ I*c
subs lr, lr, #16
vsub.f32 d6, d7, d6 @ I*s-R*c
vadd.f32 d7, d4, d5 @ R*s-I*c
uxth r10, r6, ror #16
uxth r12, r6, ror #16
uxth r6, r6
add r10, r1, r10, lsl #3
add r12, r1, r12, lsl #3
add r6, r1, r6, lsl #3
beq 1f
vld2.32 {d16,d18},[r9,:128],r12 @ x,x in2d1,in2d0
vld2.32 {d17,d19},[r8,:128],r12 @ x,x in1d1,in1d0
vld2.32 {d20,d21},[r7,:128]! @ in2u0,in2u1 x,x
vrev64.32 q9, q9 @ in2d0,in2d1 in1d0,in1d1
vld2.32 {d0, d1}, [r2,:128]! @ in0u0,in0u1 x,x
vsub.f32 d0, d0, d18 @ in0u-in2d R
vld2.32 {d2,d3}, [r4,:128]! @ c0,c1 s0,s1
vadd.f32 d20, d20, d19 @ in2u+in1d -I
vst2.32 {d6[0],d7[0]}, [r6,:64]
vst2.32 {d6[1],d7[1]}, [r10,:64]
b 1b
1:
vst2.32 {d6[0],d7[0]}, [r6,:64]
vst2.32 {d6[1],d7[1]}, [r10,: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


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