Samsung YP-P10 User Manual download pdf (Page 180)

THUMB INSTRUCTION SET S3C2440A RISC MICROPROCESSOR

INSTRUCTION CYCLE TIMES

All instructions in this format have an equivalent ARM instruction as shown in Table 4-15. The instruction cycle times

for the THUMB instruction are identical to that of the equivalent ARM instruction.

PUSH {R0-R4,LR} ; Store R0,R1,R2,R3,R4 and R14 (LR) at the stack pointed

to by R13 (SP) and update R13.

Useful at start of a sub-routine to save workspace and

return address.

POP {R2,R6,PC} ; Load R2,R6 and R15 (PC) from the stack pointed to by

R13 (SP) and update R13.Useful to restore workspace

and return from sub-routine.

Samsung YP-P10 User Manual Page 180