Stereo System User Manual

A - 242 DSP96002 USER’S MANUAL MOTOROLA
FFcc Floating-Point iF FFcc
Conditional Instruction
without CCR, ER, IER update
Operation:
If cc, then
Opcode Operation S → D
Assembler Syntax:
Opcode-Operands S,D FFcc
Opcode-Operands FFcc
Description:
If the specified floating-point condition is true, transfer data from the specified source S to the specified
destination D. Also, store result(s) of the specified Data ALU operation. If the specified condition is false,
no destinations are altered. The CCR and ER registers are not updated with the condition codes gener-
ated by the Data ALU operation. The UNCC bit in the ER register and SIOP flag in the IER are set by the
FFcc instruction if the NAN bit in the ER register was set and the specified condition is one of the condi-
tions with a "Yes" entry in the "Set UNCC" column. If no register move is specified, this instruction is as-
sembled with a R0 to R0 move.
"cc" may specify the following conditions:
Non-aware
Mnemonic Condition Set UNCC*
EQ - equal Z = 1 No
ERR - error UNCC v SNAN v OPERR v No
OVF v UNF v DZ = 1
GE - greater than or equal NAN v (N & ~Z) = 0 Yes
GL - greater or less than NAN v Z = 0 Yes
GLE - greater, less or equal NAN = 0 Yes
GT - greater than NAN v Z v N = 0 Yes
INF - infinity I = 1 Yes
LE - less than or equal NAN v ~(N v Z) = 0 Yes
LT - less than NAN v Z v ~N = 0 Yes
MI - minus N = 1 No
NE(Q) - not equal Z = 0 No
NGE - not(greater than or equal) NAN v (N & ~Z) = 1 Yes
NGL - not(greater or less than) NAN v Z = 1 Yes
NGLE - not(greater, less or equal) NAN = 1 Yes
NGT - not greater than NAN v Z v N = 1 Yes
NINF - not infinity I = 0 Yes
NLE - not(less than or equal) NAN v ~(N v Z) = 1 Yes
NLT - not less than NAN v Z v ~N = 1 Yes
OR - ordered NAN = 0 No
PL - plus N = 0 No
UN - unordered NAN = 1 No
Note: The operands for the ERR condition are taken from the ER register.
* See description of UNcc bit in Section A.4.
Move Move