diff options
Diffstat (limited to 'newlib/libc/machine/arm/strcpy.c')
| -rw-r--r-- | newlib/libc/machine/arm/strcpy.c | 169 |
1 files changed, 0 insertions, 169 deletions
diff --git a/newlib/libc/machine/arm/strcpy.c b/newlib/libc/machine/arm/strcpy.c deleted file mode 100644 index b2e3f5177..000000000 --- a/newlib/libc/machine/arm/strcpy.c +++ /dev/null @@ -1,169 +0,0 @@ -/* - * Copyright (c) 2008 ARM Ltd - * 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. The name of the company may not be used to endorse or promote - * products derived from this software without specific prior written - * permission. - * - * THIS SOFTWARE IS PROVIDED BY ARM LTD ``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 ARM LTD 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 "arm_asm.h" -#include <_ansi.h> -#include <string.h> - -#ifdef __thumb2__ -#define magic1(REG) "#0x01010101" -#define magic2(REG) "#0x80808080" -#else -#define magic1(REG) #REG -#define magic2(REG) #REG ", lsl #7" -#endif - -char* __attribute__((naked)) -strcpy (char* dst, const char* src) -{ - asm ( -#if !(defined(__OPTIMIZE_SIZE__) || defined (PREFER_SIZE_OVER_SPEED) || \ - (defined (__thumb__) && !defined (__thumb2__))) - "optpld r1\n\t" - "eor r2, r0, r1\n\t" - "mov ip, r0\n\t" - "tst r2, #3\n\t" - "bne 4f\n\t" - "tst r1, #3\n\t" - "bne 3f\n" - "5:\n\t" -#ifndef __thumb2__ - "str r5, [sp, #-4]!\n\t" - "mov r5, #0x01\n\t" - "orr r5, r5, r5, lsl #8\n\t" - "orr r5, r5, r5, lsl #16\n\t" -#endif - - "str r4, [sp, #-4]!\n\t" - "tst r1, #4\n\t" - "ldr r3, [r1], #4\n\t" - "beq 2f\n\t" - "sub r2, r3, "magic1(r5)"\n\t" - "bics r2, r2, r3\n\t" - "tst r2, "magic2(r5)"\n\t" - "itt eq\n\t" - "streq r3, [ip], #4\n\t" - "ldreq r3, [r1], #4\n" - "bne 1f\n\t" - /* Inner loop. We now know that r1 is 64-bit aligned, so we - can safely fetch up to two words. This allows us to avoid - load stalls. */ - ".p2align 2\n" - "2:\n\t" - "optpld r1, #8\n\t" - "ldr r4, [r1], #4\n\t" - "sub r2, r3, "magic1(r5)"\n\t" - "bics r2, r2, r3\n\t" - "tst r2, "magic2(r5)"\n\t" - "sub r2, r4, "magic1(r5)"\n\t" - "bne 1f\n\t" - "str r3, [ip], #4\n\t" - "bics r2, r2, r4\n\t" - "tst r2, "magic2(r5)"\n\t" - "itt eq\n\t" - "ldreq r3, [r1], #4\n\t" - "streq r4, [ip], #4\n\t" - "beq 2b\n\t" - "mov r3, r4\n" - "1:\n\t" -#ifdef __ARMEB__ - "rors r3, r3, #24\n\t" -#endif - "strb r3, [ip], #1\n\t" - "tst r3, #0xff\n\t" -#ifdef __ARMEL__ - "ror r3, r3, #8\n\t" -#endif - "bne 1b\n\t" - "ldr r4, [sp], #4\n\t" -#ifndef __thumb2__ - "ldr r5, [sp], #4\n\t" -#endif - "RETURN\n" - - /* Strings have the same offset from word alignment, but it's - not zero. */ - "3:\n\t" - "tst r1, #1\n\t" - "beq 1f\n\t" - "ldrb r2, [r1], #1\n\t" - "strb r2, [ip], #1\n\t" - "cmp r2, #0\n\t" - "it eq\n" - "RETURN eq\n" - "1:\n\t" - "tst r1, #2\n\t" - "beq 5b\n\t" - "ldrh r2, [r1], #2\n\t" -#ifdef __ARMEB__ - "tst r2, #0xff00\n\t" - "iteet ne\n\t" - "strneh r2, [ip], #2\n\t" - "lsreq r2, r2, #8\n\t" - "streqb r2, [ip]\n\t" - "tstne r2, #0xff\n\t" -#else - "tst r2, #0xff\n\t" - "itet ne\n\t" - "strneh r2, [ip], #2\n\t" - "streqb r2, [ip]\n\t" - "tstne r2, #0xff00\n\t" -#endif - "bne 5b\n\t" - "RETURN\n" - - /* src and dst do not have a common word-alignement. Fall back to - byte copying. */ - "4:\n\t" - "ldrb r2, [r1], #1\n\t" - "strb r2, [ip], #1\n\t" - "cmp r2, #0\n\t" - "bne 4b\n\t" - "RETURN" - -#elif !defined (__thumb__) || defined (__thumb2__) - "mov r3, r0\n\t" - "1:\n\t" - "ldrb r2, [r1], #1\n\t" - "strb r2, [r3], #1\n\t" - "cmp r2, #0\n\t" - "bne 1b\n\t" - "RETURN" -#else - "mov r3, r0\n\t" - "1:\n\t" - "ldrb r2, [r1]\n\t" - "add r1, r1, #1\n\t" - "strb r2, [r3]\n\t" - "add r3, r3, #1\n\t" - "cmp r2, #0\n\t" - "bne 1b\n\t" - "RETURN" -#endif - ); -} |