1*4882a593Smuzhiyun/* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun/* memset.S */ 3*4882a593Smuzhiyun 4*4882a593Smuzhiyun#include <asm/linkage.h> 5*4882a593Smuzhiyun 6*4882a593Smuzhiyun#if defined(CONFIG_CPU_H8300H) 7*4882a593Smuzhiyun .h8300h 8*4882a593Smuzhiyun#endif 9*4882a593Smuzhiyun#if defined(CONFIG_CPU_H8S) 10*4882a593Smuzhiyun .h8300s 11*4882a593Smuzhiyun#endif 12*4882a593Smuzhiyun .text 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun.global memset 15*4882a593Smuzhiyun.global clear_user 16*4882a593Smuzhiyun 17*4882a593Smuzhiyun;;void *memset(*ptr, int c, size_t count) 18*4882a593Smuzhiyun;; ptr = er0 19*4882a593Smuzhiyun;; c = er1(r1l) 20*4882a593Smuzhiyun;; count = er2 21*4882a593Smuzhiyunmemset: 22*4882a593Smuzhiyun btst #0,r0l 23*4882a593Smuzhiyun beq 2f 24*4882a593Smuzhiyun 25*4882a593Smuzhiyun ;; odd address 26*4882a593Smuzhiyun1: 27*4882a593Smuzhiyun mov.b r1l,@er0 28*4882a593Smuzhiyun adds #1,er0 29*4882a593Smuzhiyun dec.l #1,er2 30*4882a593Smuzhiyun beq 6f 31*4882a593Smuzhiyun 32*4882a593Smuzhiyun ;; even address 33*4882a593Smuzhiyun2: 34*4882a593Smuzhiyun mov.l er2,er3 35*4882a593Smuzhiyun cmp.l #4,er2 36*4882a593Smuzhiyun blo 4f 37*4882a593Smuzhiyun ;; count>=4 -> count/4 38*4882a593Smuzhiyun#if defined(CONFIG_CPU_H8300H) 39*4882a593Smuzhiyun shlr.l er2 40*4882a593Smuzhiyun shlr.l er2 41*4882a593Smuzhiyun#endif 42*4882a593Smuzhiyun#if defined(CONFIG_CPU_H8S) 43*4882a593Smuzhiyun shlr.l #2,er2 44*4882a593Smuzhiyun#endif 45*4882a593Smuzhiyun ;; byte -> long 46*4882a593Smuzhiyun mov.b r1l,r1h 47*4882a593Smuzhiyun mov.w r1,e1 48*4882a593Smuzhiyun3: 49*4882a593Smuzhiyun mov.l er1,@er0 50*4882a593Smuzhiyun adds #4,er0 51*4882a593Smuzhiyun dec.l #1,er2 52*4882a593Smuzhiyun bne 3b 53*4882a593Smuzhiyun4: 54*4882a593Smuzhiyun ;; count % 4 55*4882a593Smuzhiyun and.b #3,r3l 56*4882a593Smuzhiyun beq 6f 57*4882a593Smuzhiyun5: 58*4882a593Smuzhiyun mov.b r1l,@er0 59*4882a593Smuzhiyun adds #1,er0 60*4882a593Smuzhiyun dec.b r3l 61*4882a593Smuzhiyun bne 5b 62*4882a593Smuzhiyun6: 63*4882a593Smuzhiyun rts 64*4882a593Smuzhiyun 65*4882a593Smuzhiyunclear_user: 66*4882a593Smuzhiyun mov.l er1, er2 67*4882a593Smuzhiyun sub.l er1, er1 68*4882a593Smuzhiyun bra memset 69*4882a593Smuzhiyun 70*4882a593Smuzhiyun .end 71