Operands In The Assembly Code; Operands In Instructions; Operands - Texas Instruments TMS320C6000 Programmer's Manual

Operands

5.6 Operands
Figure 5–7. Operands in the Assembly Code
Figure 5–8. Operands in Instructions
5-8
The 'C6000 architecture requires that memory reads and writes move data
between memory and a register. Figure 5–7 shows the position of the oper-
ands in a line of assembly code.
label: parallel bars
Instructions have the following requirements for operands in the assembly
code:
All instructions require a destination operand.
Most instructions require one or two source operands.
The destination operand must be in the same register file as one source
operand.
One source operand from each register file per execute packet can come
from the register file opposite that of the other source operand.
When an operand comes from the other register file, the unit includes an X,
as shown in Figure 5–8, indicating that the instruction is using one of the
cross paths. (See the TMS320C6000 CPU and Instruction Set Reference
Guide for more information on cross paths.)
All registers except B1 are on the same side of the CPU.
The 'C6000 instructions use three types of operands to access data:
Register operands indicate a register that contains the data.
Constant operands specify the data within the assembly code.
Pointer operands contain addresses of data values.
Only the load and store instructions require and use pointer operands to
move data values between memory and a register.
[condition] instruction unit
ADD .L1
ADD .L1X
operands ; comments
A0,A1,A3
A0,B1,A3