Freescale Semiconductor StarCore SC140 - Manual (Page 700)

A-386 SC140 DSP Core Reference Manual
SKIPLS
SKIPLS
Skip Loop If LC Less Than or
SKIPLS
Equal to Zero (AGU)
Description
Status and Conditions that Affect Instruction
Status and Conditions Changed by Instruction
Example
skipls _label
Operation Assembler Syntax
If LCn
≤ 0,
then PC + displacement
→ PC
0
→ LFn
SKIPLS label
SKIPLS label
Branches to an address that is the current PC plus the displacement and disables the active loop if its loop
counter (LCn) is less than or equal to zero. The displacement is calculated by the assembler and linker.
SKIPLS is typically placed before a loop to bypass it if the loop count at run time does not indicate any
iterations. Some programming rules apply to the use of this instruction. If no loops are enabled, this
instruction is undefined.
Register Address Bit Name Description
SR[30:27] LF[3:0] Determines which loop is active.
Register Address Bit Name Description
SR[30:27] LF[3:0] Clear the active loop flag if the active loop counter is less than or equal
to one.
Register/Memory Address Before After
SR $10E0 0000 $00E0 0000
_label (displacement) $0010
PC $0000 000E $0000 001E