Motorola DSP56000 Manual page 550

Tcc
Operation:
If cc, then S1
If cc, then S1
Description: Transfer data from the specified source register S1 to the specified desti-
nation accumulator D1 if the specified condition is true. If a second source register S2
and a second destination register D2 are also specified, transfer data from address reg-
ister S2 to address register D2 if the specified condition is true. If the specified condition
is false, a NOP is executed. The term "cc'' may specify the following conditions:
CC (HS) — carry clear (higher or same)
CS (LO) — carry set (lower)
EC — extension clear
EQ — equal
ES — extension set
GE — greater than or equal
GT — greater than
LC — limit clear
LE — less than or equal
LS — limit set
LT — less than
MI — minus
NE — not equal
NR — normalized
PL — plus
NN — not normalized
where
U denotes the logical complement of U,
+
denotes the logical OR operator,
•
denotes the logical AND operator, and
⊕
denotes the logical Exclusive OR operator
When used after the CMP or CMPM instructions, the Tcc instruction can perform many
useful functions such as a "maximum value," "minimum value," "maximum absolute
value," or "minimum absolute value" function. The desired value is stored in the destina-
A - 284
INSTRUCTION DESCRIPTIONS
Transfer Conditionally
D1
D1 and S2 D2
"cc'' Mnemonic
INSTRUCTION SET DETAILS
Assembler Syntax:
Tcc S1,D1
Tcc S1,D1 S2,D2
Condition
C=0
C=1
E=0
Z=1
E=1
⊕
N V=0
⊕
Z+(N
L=0
⊕
Z+(N
L=1
⊕
N V=1
N=1
Z=0
•
Z+(U E)=1
N=0
•
Z+(U E)=0
Tcc
V)=0
V)=1
MOTOROLA