diff options
Diffstat (limited to 'lib/libc/arm/string/memset.S')
| -rw-r--r-- | lib/libc/arm/string/memset.S | 236 |
1 files changed, 0 insertions, 236 deletions
diff --git a/lib/libc/arm/string/memset.S b/lib/libc/arm/string/memset.S deleted file mode 100644 index 5387aab..0000000 --- a/lib/libc/arm/string/memset.S +++ /dev/null @@ -1,236 +0,0 @@ -/* $NetBSD: memset.S,v 1.4 2003/10/14 07:51:45 scw Exp $ */ - -/* - * Copyright 2003 Wasabi Systems, Inc. - * All rights reserved. - * - * Written by Steve C. Woodford for Wasabi Systems, Inc. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed for the NetBSD Project by - * Wasabi Systems, Inc. - * 4. The name of Wasabi Systems, Inc. may not be used to endorse - * or promote products derived from this software without specific prior - * written permission. - * - * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED - * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR - * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC - * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - */ -/* - * Copyright (c) 1995 Mark Brinicombe. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by Mark Brinicombe. - * 4. The name of the company nor the name of the author may be used to - * endorse or promote products derived from this software without specific - * prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED - * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. - * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, - * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES - * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR - * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include <machine/asm.h> -__FBSDID("$FreeBSD$"); - -/* - * memset: Sets a block of memory to the specified value - * - * On entry: - * r0 - dest address - * r1 - byte to write - * r2 - number of bytes to write - * - * On exit: - * r0 - dest address - */ -#ifdef _BZERO -/* LINTSTUB: Func: void bzero(void *, size_t) */ -ENTRY(bzero) - mov r3, #0x00 -#else -/* LINTSTUB: Func: void *memset(void *, int, size_t) */ -ENTRY(memset) - and r3, r1, #0xff /* We deal with bytes */ - mov r1, r2 -#endif - cmp r1, #0x04 /* Do we have less than 4 bytes */ - mov ip, r0 - blt .Lmemset_lessthanfour - - /* Ok first we will word align the address */ - ands r2, ip, #0x03 /* Get the bottom two bits */ - bne .Lmemset_wordunaligned /* The address is not word aligned */ - - /* We are now word aligned */ -.Lmemset_wordaligned: -#ifndef _BZERO - orr r3, r3, r3, lsl #8 /* Extend value to 16-bits */ -#endif -#ifdef _ARM_ARCH_5E - tst ip, #0x04 /* Quad-align for armv5e */ -#else - cmp r1, #0x10 -#endif -#ifndef _BZERO - orr r3, r3, r3, lsl #16 /* Extend value to 32-bits */ -#endif -#ifdef _ARM_ARCH_5E - subne r1, r1, #0x04 /* Quad-align if necessary */ - strne r3, [ip], #0x04 - cmp r1, #0x10 -#endif - blt .Lmemset_loop4 /* If less than 16 then use words */ - mov r2, r3 /* Duplicate data */ - cmp r1, #0x80 /* If < 128 then skip the big loop */ - blt .Lmemset_loop32 - - /* Do 128 bytes at a time */ -.Lmemset_loop128: - subs r1, r1, #0x80 -#ifdef _ARM_ARCH_5E - strged r2, [ip], #0x08 - strged r2, [ip], #0x08 - strged r2, [ip], #0x08 - strged r2, [ip], #0x08 - strged r2, [ip], #0x08 - strged r2, [ip], #0x08 - strged r2, [ip], #0x08 - strged r2, [ip], #0x08 - strged r2, [ip], #0x08 - strged r2, [ip], #0x08 - strged r2, [ip], #0x08 - strged r2, [ip], #0x08 - strged r2, [ip], #0x08 - strged r2, [ip], #0x08 - strged r2, [ip], #0x08 - strged r2, [ip], #0x08 -#else - stmgeia ip!, {r2-r3} - stmgeia ip!, {r2-r3} - stmgeia ip!, {r2-r3} - stmgeia ip!, {r2-r3} - stmgeia ip!, {r2-r3} - stmgeia ip!, {r2-r3} - stmgeia ip!, {r2-r3} - stmgeia ip!, {r2-r3} - stmgeia ip!, {r2-r3} - stmgeia ip!, {r2-r3} - stmgeia ip!, {r2-r3} - stmgeia ip!, {r2-r3} - stmgeia ip!, {r2-r3} - stmgeia ip!, {r2-r3} - stmgeia ip!, {r2-r3} - stmgeia ip!, {r2-r3} -#endif - bgt .Lmemset_loop128 - RETeq /* Zero length so just exit */ - - add r1, r1, #0x80 /* Adjust for extra sub */ - - /* Do 32 bytes at a time */ -.Lmemset_loop32: - subs r1, r1, #0x20 -#ifdef _ARM_ARCH_5E - strged r2, [ip], #0x08 - strged r2, [ip], #0x08 - strged r2, [ip], #0x08 - strged r2, [ip], #0x08 -#else - stmgeia ip!, {r2-r3} - stmgeia ip!, {r2-r3} - stmgeia ip!, {r2-r3} - stmgeia ip!, {r2-r3} -#endif - bgt .Lmemset_loop32 - RETeq /* Zero length so just exit */ - - adds r1, r1, #0x10 /* Partially adjust for extra sub */ - - /* Deal with 16 bytes or more */ -#ifdef _ARM_ARCH_5E - strged r2, [ip], #0x08 - strged r2, [ip], #0x08 -#else - stmgeia ip!, {r2-r3} - stmgeia ip!, {r2-r3} -#endif - RETeq /* Zero length so just exit */ - - addlt r1, r1, #0x10 /* Possibly adjust for extra sub */ - - /* We have at least 4 bytes so copy as words */ -.Lmemset_loop4: - subs r1, r1, #0x04 - strge r3, [ip], #0x04 - bgt .Lmemset_loop4 - RETeq /* Zero length so just exit */ - -#ifdef _ARM_ARCH_5E - /* Compensate for 64-bit alignment check */ - adds r1, r1, #0x04 - RETeq - cmp r1, #2 -#else - cmp r1, #-2 -#endif - - strb r3, [ip], #0x01 /* Set 1 byte */ - strgeb r3, [ip], #0x01 /* Set another byte */ - strgtb r3, [ip] /* and a third */ - RET /* Exit */ - -.Lmemset_wordunaligned: - rsb r2, r2, #0x004 - strb r3, [ip], #0x01 /* Set 1 byte */ - cmp r2, #0x02 - strgeb r3, [ip], #0x01 /* Set another byte */ - sub r1, r1, r2 - strgtb r3, [ip], #0x01 /* and a third */ - cmp r1, #0x04 /* More than 4 bytes left? */ - bge .Lmemset_wordaligned /* Yup */ - -.Lmemset_lessthanfour: - cmp r1, #0x00 - RETeq /* Zero length so exit */ - strb r3, [ip], #0x01 /* Set 1 byte */ - cmp r1, #0x02 - strgeb r3, [ip], #0x01 /* Set another byte */ - strgtb r3, [ip] /* and a third */ - RET /* Exit */ |
