/* *  arch/s390/kernel/strncpy.S *    S390 strncpy routine * *  S390 version *    Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation *    Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com), *//* * R2 = address of destination * R3 = address of source string * R4 = max number of bytes to copy */        .globl   strncpystrncpy:        LR      1,2            # don't touch address in R2	LTR     4,4        JZ      strncpy_exit   # 0 bytes -> nothing to do	SR      0,0strncpy_loop:        ICM     0,1,0(3)       # ICM sets the cc, IC does not	LA      3,1(3)        STC     0,0(1)	LA      1,1(1)        JZ      strncpy_exit   # ICM inserted a 0x00        BRCT    4,strncpy_loop # R4 -= 1, jump to strncpy_loop if >  0strncpy_exit:        BR      14