Lucent Technologies DSP1611, Information Manual

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Information Manual DSP1611/17/18/27/28/29 DIGITAL SIGNAL PROCESSOR
April 1998 Instruction Set
Lucent Technologies Inc.
DRAFT COPY
4-27
4.5 Instruction Set
(continued)
4.5.5 Multiply/ALU Group (continued)
Z : y x = X The data from the specified X source is loaded into the x register. The data from the specified
Z source is loaded into the high half (bits 31—16) of the y register, and the old data from the high half of the
y register is loaded into the Z destination. If clearing of yl is enabled by using the CLR field of the auc register, yl
is cleared (0) when the high half is loaded.
Z : y The data from the specified Z source is loaded into the high half (bits 31—16) of the y register, and the old
data from the high half of the y register is loaded into the Z destination. If clearing of yl is enabled by using the
CLR field of the auc register, yl is cleared (0) when the high half is loaded. (See
Figure 4-3, on page 4-28 .)
Z : yl The data from the specified Z source is loaded into the low half (bits 15—0) of the y register, and the old
data of the low half of the y register is loaded into the Z destination. Data in the high half of the y register is not
altered. (See Figure 4-3.)
Z : aT The data from the specified Z source is loaded into the high half (bits 31—16) of the specified accumula-
tor. If clearing of aTl is enabled by using the CLR field of the auc register, the low half of the accumulator is
cleared (0) when the high half is loaded. The guard bits (35—32) are loaded with the value of bit 31. The old
data from the high half of the accumulator is loaded into the Z destination. If saturation on overflow is enabled by
using the SAT field of the auc register, the transferred accumulator value is limited. (See
Section 5.1, Data Arith-
metic Unit and Figure 4-3, on page 4-28 .)
Z : aTl The data from the specified Z source is loaded into the low half (bits 15—0) of the specified accumulator
and the old data from the low half of the accumulator is loaded into the Z destination. The data in the high half of
the accumulator is not altered. (See
Figure 4-3, on page 4-28 .)