How to do cross multiplication in neon?
up vote
0
down vote
favorite
Now, I have two 8bit arrays
One is
A[8] = {1,2,3,4,5,6,7,8}
Another is
B[2] = {1,2}
What I want to calculate is that:
C = A x B = {1,2,3,4,5,6,7,8} x {1, 2, 1, 2, 1, 2, 1, 2} = {1,4,3,8,5,12,7,16}
How to do this using armv7 simd
efficiently?
simd neon armv7
asked Oct 12 at 4:17
Y.Zhu
177
add a comment |
up vote
0
down vote
favorite
Now, I have two 8bit arrays
One is
A[8] = {1,2,3,4,5,6,7,8}
Another is
B[2] = {1,2}
What I want to calculate is that:
C = A x B = {1,2,3,4,5,6,7,8} x {1, 2, 1, 2, 1, 2, 1, 2} = {1,4,3,8,5,12,7,16}
How to do this using armv7 simd
efficiently?
simd neon armv7
asked Oct 12 at 4:17
Y.Zhu
177
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
Now, I have two 8bit arrays
One is
A[8] = {1,2,3,4,5,6,7,8}
Another is
B[2] = {1,2}
What I want to calculate is that:
C = A x B = {1,2,3,4,5,6,7,8} x {1, 2, 1, 2, 1, 2, 1, 2} = {1,4,3,8,5,12,7,16}
How to do this using armv7 simd
efficiently?
simd neon armv7
asked Oct 12 at 4:17
Y.Zhu
177
Now, I have two 8bit arrays
One is
A[8] = {1,2,3,4,5,6,7,8}
Another is
B[2] = {1,2}
What I want to calculate is that:
C = A x B = {1,2,3,4,5,6,7,8} x {1, 2, 1, 2, 1, 2, 1, 2} = {1,4,3,8,5,12,7,16}
How to do this using armv7 simd
efficiently?
simd neon armv7
simd neon armv7
asked Oct 12 at 4:17
Y.Zhu
177
asked Oct 12 at 4:17
Y.Zhu
177
edited Oct 12 at 4:26
asked Oct 12 at 4:17
Y.Zhu
177
asked Oct 12 at 4:17
Y.Zhu
177
asked Oct 12 at 4:17
Y.Zhu
177
177
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
up vote
0
down vote
Define B as B[8] = {1,2,1,2,1,2,1,2} and use vld1_u8 and vmul_u8.
answered Nov 11 at 4:47
rainhaven
1403
How to define B as {1,2,1,2,1,2,1,2} ？Here i need the cross load and the duplication, and that's the point.
– Y.Zhu
Nov 12 at 6:00
add a comment |
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
0
down vote
Define B as B[8] = {1,2,1,2,1,2,1,2} and use vld1_u8 and vmul_u8.
answered Nov 11 at 4:47
rainhaven
1403
How to define B as {1,2,1,2,1,2,1,2} ？Here i need the cross load and the duplication, and that's the point.
– Y.Zhu
Nov 12 at 6:00
add a comment |
up vote
0
down vote
Define B as B[8] = {1,2,1,2,1,2,1,2} and use vld1_u8 and vmul_u8.
answered Nov 11 at 4:47
rainhaven
1403
How to define B as {1,2,1,2,1,2,1,2} ？Here i need the cross load and the duplication, and that's the point.
– Y.Zhu
Nov 12 at 6:00
add a comment |
up vote
0
down vote
up vote
0
down vote
Define B as B[8] = {1,2,1,2,1,2,1,2} and use vld1_u8 and vmul_u8.
answered Nov 11 at 4:47
rainhaven
1403
Define B as B[8] = {1,2,1,2,1,2,1,2} and use vld1_u8 and vmul_u8.
answered Nov 11 at 4:47
rainhaven
1403
answered Nov 11 at 4:47
rainhaven
1403
answered Nov 11 at 4:47
rainhaven
1403
answered Nov 11 at 4:47
rainhaven
1403
1403
How to define B as {1,2,1,2,1,2,1,2} ？Here i need the cross load and the duplication, and that's the point.
– Y.Zhu
Nov 12 at 6:00
add a comment |
How to define B as {1,2,1,2,1,2,1,2} ？Here i need the cross load and the duplication, and that's the point.
– Y.Zhu
Nov 12 at 6:00
How to define B as {1,2,1,2,1,2,1,2} ？Here i need the cross load and the duplication, and that's the point.
– Y.Zhu
Nov 12 at 6:00
How to define B as {1,2,1,2,1,2,1,2} ？Here i need the cross load and the duplication, and that's the point.
– Y.Zhu
Nov 12 at 6:00
add a comment |
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