Motorola DSP96002 User Manual page 774

D.1.5.1.2.7 Data ALU Results/Move Compatibility Summary
Figure C-3 summarizes what happens when Data ALU operation results of a certain range is stored in the
destination register, and the register is read by a certain kind of move.
All cases where "move out type"=SP and "move out result"=WRONG can be corrected by rounding in the
instruction (using the .S option). The case where "move out type"=SP and "move out result"=TRUNC can
also be corrected by using the .S option.
ROUND EXPONENT RANGE
TO BEFORE ROUND
(UNBIASED)
SP NaN operand or
invalid op
SP 127<e
SP 127<e< 128
SP -150 e
SP e
SEP NaN operand or
invalid op
SEP 1023<e
SEP 127<e< 1024
SEP -127<e< 128
Figure C -3. Data ALU Results/Move Compatibility Summary (Continued)
D-22
DATA ALU OPERATION
RESULT
non signaling NaN (QNAN)
written as DP
e=7FF mantissa=1.11...11
infinity (overflow)
written as DP
e=7FF mantissa=1.00...00
normalized (all formats)
126 denormalized (in SP)
149 zero (underflow)
non signaling NaN (QNAN)
written as DP
e=7FF mantissa=1.11...11
infinity in SP and SEP
written as DP
e=7FF mantissa=1.00...00
infinity in SP
normalized in SEP
normalized (all formats)
DSP96002 USER'S MANUAL
TAGS
U V
0 0
QNAN
0 0
infinity
0 0
1 0
0 0
0 0
QNAN
0 0
infinity
0 0
0 0
MOVE MOVE OUT
OUT RESULT
TYPE
SP CORRECT
DP CORRECT
SP CORRECT
DP CORRECT
SP CORRECT
DP CORRECT
SP CORRECT
DP WRONG
SP CORRECT
DP CORRECT
SP CORRECT
DP CORRECT
SP CORRECT
DP CORRECT
SP WRONG
DP CORRECT
SP TRUNC
DP CORRECT
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