Texas Instruments TMS320C67X/C67X+ DSP - Manual (Page 156)

CMPLT Compare for Less Than, Signed Integers
3-96 Instruction Set SPRU733
Description Performs a signed comparison of src1 to src2. If src1 is less than src2, then
1 is written to dst; otherwise, 0 is written to dst.
Note:
The CMPLT instruction allows using a 5-bit constant as src1. If src2 is a 5-bit
constant, as in
CMPLT .L1 A4, 5, A0
Then to implement this operation, the assembler converts this instruction to
CMPGT .L1 5, A4, A0
These two instructions are equivalent, with the second instruction using the
conventional operand types for src1 and src2.
Similarly, the CMPLT instruction allows a cross path operand to be used as
src2. If src1 is a cross path operand as in
CMPLT .L1x B4, A5, A0
Then to implement this operation, the assembler converts this instruction to
CMPGT .L1x A5, B4, A0
In both of these operations the listing file (.lst) will have the first implementa-
tion, and the second implementation will appear in the debugger.
Execution if (cond) {
if (src1
< src2) 1 → dst
else 0 → dst
}
else nop
Pipeline
Stage
E1
Read src1, src2
Written dst
Unit in use .L
Instruction Type Single-cycle
Delay Slots 0
See Also CMPEQ, CMPGT, CMPLTDP, CMPLTSP, CMPLTU
Pipeline