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src2
src2
.D1
.M1
.S1
.L1
long src
odd dst
src2
src1
src1
src1
src1
even dst
even dst
odd dst
dst1
dst
src2
src2
src2
long src
DA1
ST1b
LD1b
LD1a
ST1a
Data path A
Odd
register
file A
(A1, A3,
A5...A31)
Odd
register
file B
(B1, B3,
B5...B31)
.D2
src1
dst
src2
DA2
LD2a
LD2b
src2
.M2
src1
dst1
.S2
src1
even dst
long src
odd dst
ST2a
ST2b
long src
.L2
even dst
odd dst
src1
Data path B
Control Register
32 MSB
32 LSB
dst2
(A)
32 MSB
32 LSB
2x
1x
32 LSB
32 MSB
32 LSB
32 MSB
dst2
(B)
(B)
(A)
8
8
8
8
32
32
32
32
(C)
(C)
Even
register
file A
(A0, A2,
A4...A30)
Even
register
file B
(B0, B2,
B4...B30)
(D)
(D)
(D)
(D)
A. On .M unit, dst2 is 32 MSB.
B. On .M unit, dst1 is 32 LSB.
C. On C64x CPU .M unit, src2 is 32 bits; on C64x+ CPU .M unit, src2 is 64 bits.
D. On .L and .S units, odd dst connects to odd register files and even dst connects to even register files.
SM320C6455-EP
FIXED-POINTDIGITALSIGNALPROCESSOR
SPRS462B–SEPTEMBER2007–REVISEDJANUARY2008
Figure2-1.C64x+™CPU(DSPCore)DataPaths
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