cmpli (Compare Logical Immediate) instruction
Purpose
Compares the contents of a general-purpose register and a given value logically.
Syntax
| Bits | Value |
|---|---|
| 0-5 | 10 |
| 6-8 | BF |
| 9 | / |
| 10 | L |
| 11-15 | RA |
| 16-31 | UI |
See Extended Mnemonics of Fixed-Point Compare Instructions for more information.
Description
The cmpli instruction compares the contents of general-purpose register (GPR) RA with the concatenation of x`0000' and a 16-bit unsigned integer, UI, as unsigned integers and sets one of the bits in the Condition Register Field BF.
BF can be Condition Register Field 0-7; programmers can specify which Condition Register Field will indicate the result of the operation.
The bits of Condition Register Field BF are interpreted as follows:
| Item | Description | |
|---|---|---|
| Bit | Name | Description |
| 0 | LT | (RA) < SI |
| 1 | GT | (RA) > SI |
| 2 | EQ | (RA) = SI |
| 3 | SO | SO,OV |
The cmpli instruction has one syntax form and does not affect the Fixed-Point Exception Register. Condition Register Field 0 is unaffected unless it is specified as BF by the programmer.
Parameters
| Item | Description |
|---|---|
| BF | Specifies Condition Register Field 0-7 that indicates result of compare. |
| L | Must be set to 0 for the 32-bit subset architecture. |
| RA | Specifies source general-purpose register for operation. |
| UI | Specifies 16-bit unsigned integer for operation. |
Examples
The following code compares the contents of GPR 4 and the unsigned integer 0xff and sets Condition Register Field 0 to reflect the result of the operation:
# Assume GPR 4 contains 0x0000 00ff.
cmpli 0,4,0xff
# The EQ bit of Condition Register Field 0 is set.