/* * Copyright (C) 2013 ARM Ltd. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include <arch/asm.h> /* * Fill in the buffer with character c (alignment handled by the hardware) * * Parameters: * x0 - buf * x1 - c * x2 - n * Returns: * x0 - buf */ ENTRY(memset) mov x4, x0 and w1, w1, #0xff orr w1, w1, w1, lsl #8 orr w1, w1, w1, lsl #16 orr x1, x1, x1, lsl #32 subs x2, x2, #8 b.mi 2f 1: str x1, [x4], #8 subs x2, x2, #8 b.pl 1b 2: adds x2, x2, #4 b.mi 3f sub x2, x2, #4 str w1, [x4], #4 3: adds x2, x2, #2 b.mi 4f sub x2, x2, #2 strh w1, [x4], #2 4: adds x2, x2, #1 b.mi 5f strb w1, [x4] 5: ret ENDPROC(memset)