Texas TMS320C67X/C67X+ DSP Benutzerhandbuch
NOP
No Operation
3-190
Instruction Set
SPRU733
No Operation
NOP
Syntax
NOP [count]
.unit = none
Compatibility
C62x, C64x, C67x, and C67x+ CPU
Opcode
31
18
17
16
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Reserved
0
src
0 0 0 0 0 0 0 0 0 0 0 0 p
14
4
1
Opcode map field used...
For operand type...
Unit
src
ucst4
none
Description
src is encoded as count − 1. For src + 1 cycles, no operation is performed. The
maximum value for count is 9. NOP with no operand is treated like NOP 1 with
src encoded as 0000.
maximum value for count is 9. NOP with no operand is treated like NOP 1 with
src encoded as 0000.
A multicycle NOP will not finish if a branch is completed first. For example, if
a branch is initiated on cycle n and a NOP 5 instruction is initiated on cycle
n + 3, the branch is complete on cycle n + 6 and the NOP is executed only from
cycle n + 3 to cycle n + 5. A single-cycle NOP in parallel with other instructions
does not affect operation.
a branch is initiated on cycle n and a NOP 5 instruction is initiated on cycle
n + 3, the branch is complete on cycle n + 6 and the NOP is executed only from
cycle n + 3 to cycle n + 5. A single-cycle NOP in parallel with other instructions
does not affect operation.
Execution
No operation for count cycles
Instruction Type
NOP
Delay Slots
0