Analog Devices ADSP-21261 SHARC, Справочник по аппаратуре

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SIMD Mode and Sequencing
3-42 ADSP-2126x SHARC Processor Hardware Reference
Case #2: Uncomplimentary-to-Complementary Register
Move
In this case, data moves from an uncomplemented register (
Ureg
without a
SIMD complement) to a complementary register pair. The DSP executes
the explicit move depending on the evaluation of the conditional test in
the PEx processing element. The DSP executes the implicit move depend-
ing on the evaluation of the conditional test in the PEy processing
element. In each processing element where the move occurs, the content
of the source register is duplicated in the destination register.
Example: Register Moves – Uncomplimentary-to-Complementary

While
PX1
and
PX2
are complementary registers, the combined
PX
register has no complementary register. For more information, see
“Internal Data Bus Exchange” on page 5-6.
For the following instruction the DSP is operating in SIMD mode. The
data movement resulting from the evaluation of the conditional test in the
PEx and PEy processing elements is shown in
Table 3-19 .
IF EQ R1 = PX;
1 0 s2 transfers to registers r9,
px1, and ustat1 NO data move to registers s9,
px2, and ustat2 occurs
1 1 s2 transfers to registers r9,
px1, and ustat1 r2 transfers to registers s9, px2,
and ustat2
Table 3-18. Register-to-Register Moves – Complementary Register Pairs
Condition
in PEx Condition
in PEy Result
AZx AZy Explicit Implicit