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If the system stack register SSH is specified as a source operand, the system stack pointer SP is postdec-
remented by 1 after SSH is read. If the system stack register SSH is specified as a destination operand,
the system stack pointer SP is preincremented by 1 before SSH is written. This allows the system stack
to be efficiently extended using software stack pointer operations.
See Section A.10 for restrictions that apply to this instruction.
See restrictions in Section A.10.6 concerning Rn, Mn, and Nn registers as a
destination.
CCR Condition Codes:
For destination operand SR:
C
- Set according to bit 0 of the source operand.
V
- Set according to bit 1 of the source operand.
Z
- Set according to bit 2 of the source operand.
N
- Set according to bit 3 of the source operand.
I
- Set according to bit 4 of the source operand.
LR
- Set according to bit 5 of the source operand.
–
R
- Set according to bit 6 of the source operand.
A
- Set according to bit 7 of the source operand.
For destination operands other than SR:
C
- Not affected.
V
- Not affected.
Z
- Not affected.
N
- Not affected.
I
- Not affected.
LR
- Not affected.
–
R
- Not affected.
A
- Not affected.
ER Status Bits:
For destination operand SR:
INX
-Set according to bit 8 of the source operand.
DZ
-Set according to bit 9 of the source operand.
UNF
-Set according to bit 10 of the source operand.
OVF
-Set according to bit 11 of the source operand.
OPERR-Set according to bit 12 of the source operand.
SNAN -Set according to bit 13 of the source operand.
NAN
-Set according to bit 14 of the source operand.
UNCC -Set according to bit 15 of the source operand.
A - 270
CAUTION
DSP96002 USER'S MANUAL
MOTOROLA
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