diff options
| -rw-r--r-- | linux/src/include/asm-i386/string-486.h | 702 |
1 files changed, 0 insertions, 702 deletions
diff --git a/linux/src/include/asm-i386/string-486.h b/linux/src/include/asm-i386/string-486.h deleted file mode 100644 index 1a337ba..0000000 --- a/linux/src/include/asm-i386/string-486.h +++ /dev/null @@ -1,702 +0,0 @@ -#ifndef _I386_STRING_I486_H_ -#define _I386_STRING_I486_H_ - -/* - * This string-include defines all string functions as inline - * functions. Use gcc. It also assumes ds=es=data space, this should be - * normal. Most of the string-functions are rather heavily hand-optimized, - * see especially strtok,strstr,str[c]spn. They should work, but are not - * very easy to understand. Everything is done entirely within the register - * set, making the functions fast and clean. - * - * Copyright (C) 1991, 1992 Linus Torvalds - * Revised and optimized for i486/pentium - * 1994/03/15 by Alberto Vignani/Davide Parodi @crf.it - * - * Split into 2 CPU specific files by Alan Cox to keep #ifdef noise down. - */ - -#define __HAVE_ARCH_STRCPY -extern inline char * strcpy(char * dest,const char *src) -{ -register char *tmp= (char *)dest; -register char dummy; -__asm__ __volatile__( - "\n1:\t" - "movb (%0),%b2\n\t" - "incl %0\n\t" - "movb %b2,(%1)\n\t" - "incl %1\n\t" - "testb %b2,%b2\n\t" - "jne 1b" - :"=r" (src), "=r" (tmp), "=q" (dummy) - :"0" (src), "1" (tmp) - :"memory"); -return dest; -} - -#define __HAVE_ARCH_STRNCPY -extern inline char * strncpy(char * dest,const char *src,size_t count) -{ -register char *tmp= (char *)dest; -register char dummy; -if (count) { -__asm__ __volatile__( - "\n1:\t" - "movb (%0),%b2\n\t" - "incl %0\n\t" - "movb %b2,(%1)\n\t" - "incl %1\n\t" - "decl %3\n\t" - "je 3f\n\t" - "testb %b2,%b2\n\t" - "jne 1b\n\t" - "2:\tmovb %b2,(%1)\n\t" - "incl %1\n\t" - "decl %3\n\t" - "jne 2b\n\t" - "3:" - :"=r" (src), "=r" (tmp), "=q" (dummy), "=r" (count) - :"0" (src), "1" (tmp), "3" (count) - :"memory"); - } /* if (count) */ -return dest; -} - -#define __HAVE_ARCH_STRCAT -extern inline char * strcat(char * dest,const char * src) -{ -register char *tmp = (char *)(dest-1); -register char dummy; -__asm__ __volatile__( - "\n1:\tincl %1\n\t" - "cmpb $0,(%1)\n\t" - "jne 1b\n" - "2:\tmovb (%2),%b0\n\t" - "incl %2\n\t" - "movb %b0,(%1)\n\t" - "incl %1\n\t" - "testb %b0,%b0\n\t" - "jne 2b\n" - :"=q" (dummy), "=r" (tmp), "=r" (src) - :"1" (tmp), "2" (src) - :"memory"); -return dest; -} - -#define __HAVE_ARCH_STRNCAT -extern inline char * strncat(char * dest,const char * src,size_t count) -{ -register char *tmp = (char *)(dest-1); -register char dummy; -__asm__ __volatile__( - "\n1:\tincl %1\n\t" - "cmpb $0,(%1)\n\t" - "jne 1b\n" - "2:\tdecl %3\n\t" - "js 3f\n\t" - "movb (%2),%b0\n\t" - "incl %2\n\t" - "movb %b0,(%1)\n\t" - "incl %1\n\t" - "testb %b0,%b0\n\t" - "jne 2b\n" - "3:\txorb %b0,%b0\n\t" - "movb %b0,(%1)\n\t" - :"=q" (dummy), "=r" (tmp), "=r" (src), "=r" (count) - :"1" (tmp), "2" (src), "3" (count) - :"memory"); -return dest; -} - -#define __HAVE_ARCH_STRCMP -extern inline int strcmp(const char * cs,const char * ct) -{ -register int __res; -__asm__ __volatile__( - "\n1:\tmovb (%1),%b0\n\t" - "incl %1\n\t" - "cmpb %b0,(%2)\n\t" - "jne 2f\n\t" - "incl %2\n\t" - "testb %b0,%b0\n\t" - "jne 1b\n\t" - "xorl %k0,%k0\n\t" - "jmp 3f\n" - "2:\tmovl $1,%k0\n\t" - "jb 3f\n\t" - "negl %k0\n" - "3:" - :"=q" (__res), "=r" (cs), "=r" (ct) - :"1" (cs), "2" (ct) - : "memory" ); -return __res; -} - -#define __HAVE_ARCH_STRNCMP -extern inline int strncmp(const char * cs,const char * ct,size_t count) -{ -register int __res; -__asm__ __volatile__( - "\n1:\tdecl %3\n\t" - "js 2f\n\t" - "movb (%1),%b0\n\t" - "incl %1\n\t" - "cmpb %b0,(%2)\n\t" - "jne 3f\n\t" - "incl %2\n\t" - "testb %b0,%b0\n\t" - "jne 1b\n" - "2:\txorl %k0,%k0\n\t" - "jmp 4f\n" - "3:\tmovl $1,%k0\n\t" - "jb 4f\n\t" - "negl %k0\n" - "4:" - :"=q" (__res), "=r" (cs), "=r" (ct), "=r" (count) - :"1" (cs), "2" (ct), "3" (count)); -return __res; -} - -#define __HAVE_ARCH_STRCHR -extern inline char * strchr(const char * s, int c) -{ -register char * __res; -__asm__ __volatile__( - "movb %%al,%%ah\n" - "1:\tmovb (%1),%%al\n\t" - "cmpb %%ah,%%al\n\t" - "je 2f\n\t" - "incl %1\n\t" - "testb %%al,%%al\n\t" - "jne 1b\n\t" - "xorl %1,%1\n" - "2:\tmovl %1,%0\n\t" - :"=a" (__res), "=r" (s) - :"0" (c), "1" (s)); -return __res; -} - -#define __HAVE_ARCH_STRRCHR -extern inline char * strrchr(const char * s, int c) -{ -register char * __res; -__asm__ __volatile__( - "cld\n\t" - "movb %%al,%%ah\n" - "1:\tlodsb\n\t" - "cmpb %%ah,%%al\n\t" - "jne 2f\n\t" - "leal -1(%%esi),%0\n" - "2:\ttestb %%al,%%al\n\t" - "jne 1b" - :"=d" (__res):"0" (0),"S" (s),"a" (c):"ax","si"); -return __res; -} - -#define __HAVE_ARCH_STRSPN -extern inline size_t strspn(const char * cs, const char * ct) -{ -register char * __res; -__asm__ __volatile__( - "cld\n\t" - "movl %4,%%edi\n\t" - "repne\n\t" - "scasb\n\t" - "notl %%ecx\n\t" - "decl %%ecx\n\t" - "movl %%ecx,%%edx\n" - "1:\tlodsb\n\t" - "testb %%al,%%al\n\t" - "je 2f\n\t" - "movl %4,%%edi\n\t" - "movl %%edx,%%ecx\n\t" - "repne\n\t" - "scasb\n\t" - "je 1b\n" - "2:\tdecl %0" - :"=S" (__res):"a" (0),"c" (0xffffffff),"0" (cs),"g" (ct) - :"ax","cx","dx","di"); -return __res-cs; -} - -#define __HAVE_ARCH_STRCSPN -extern inline size_t strcspn(const char * cs, const char * ct) -{ -register char * __res; -__asm__ __volatile__( - "cld\n\t" - "movl %4,%%edi\n\t" - "repne\n\t" - "scasb\n\t" - "notl %%ecx\n\t" - "decl %%ecx\n\t" - "movl %%ecx,%%edx\n" - "1:\tlodsb\n\t" - "testb %%al,%%al\n\t" - "je 2f\n\t" - "movl %4,%%edi\n\t" - "movl %%edx,%%ecx\n\t" - "repne\n\t" - "scasb\n\t" - "jne 1b\n" - "2:\tdecl %0" - :"=S" (__res):"a" (0),"c" (0xffffffff),"0" (cs),"g" (ct) - :"ax","cx","dx","di"); -return __res-cs; -} - -#define __HAVE_ARCH_STRPBRK -extern inline char * strpbrk(const char * cs,const char * ct) -{ -register char * __res; -__asm__ __volatile__( - "cld\n\t" - "movl %4,%%edi\n\t" - "repne\n\t" - "scasb\n\t" - "notl %%ecx\n\t" - "decl %%ecx\n\t" - "movl %%ecx,%%edx\n" - "1:\tlodsb\n\t" - "testb %%al,%%al\n\t" - "je 2f\n\t" - "movl %4,%%edi\n\t" - "movl %%edx,%%ecx\n\t" - "repne\n\t" - "scasb\n\t" - "jne 1b\n\t" - "decl %0\n\t" - "jmp 3f\n" - "2:\txorl %0,%0\n" - "3:" - :"=S" (__res):"a" (0),"c" (0xffffffff),"0" (cs),"g" (ct) - :"ax","cx","dx","di"); -return __res; -} - -#define __HAVE_ARCH_STRSTR -extern inline char * strstr(const char * cs,const char * ct) -{ -register char * __res; -__asm__ __volatile__( - "cld\n\t" \ - "movl %4,%%edi\n\t" - "repne\n\t" - "scasb\n\t" - "notl %%ecx\n\t" - "decl %%ecx\n\t" /* NOTE! This also sets Z if searchstring='' */ - "movl %%ecx,%%edx\n" - "1:\tmovl %4,%%edi\n\t" - "movl %%esi,%%eax\n\t" - "movl %%edx,%%ecx\n\t" - "repe\n\t" - "cmpsb\n\t" - "je 2f\n\t" /* also works for empty string, see above */ - "xchgl %%eax,%%esi\n\t" - "incl %%esi\n\t" - "cmpb $0,-1(%%eax)\n\t" - "jne 1b\n\t" - "xorl %%eax,%%eax\n\t" - "2:" - :"=a" (__res):"0" (0),"c" (0xffffffff),"S" (cs),"g" (ct) - :"cx","dx","di","si"); -return __res; -} - -#define __HAVE_ARCH_STRLEN -extern inline size_t strlen(const char * s) -{ -/* - * slightly slower on a 486, but with better chances of - * register allocation - */ -register char dummy, *tmp= (char *)s; -__asm__ __volatile__( - "\n1:\t" - "movb\t(%0),%1\n\t" - "incl\t%0\n\t" - "testb\t%1,%1\n\t" - "jne\t1b" - :"=r" (tmp),"=q" (dummy) - :"0" (s) - : "memory" ); -return (tmp-s-1); -} - -/* Added by Gertjan van Wingerde to make minix and sysv module work */ -#define __HAVE_ARCH_STRNLEN -extern inline size_t strnlen(const char * s, size_t count) -{ -register int __res; -__asm__ __volatile__( - "movl %1,%0\n\t" - "jmp 2f\n" - "1:\tcmpb $0,(%0)\n\t" - "je 3f\n\t" - "incl %0\n" - "2:\tdecl %2\n\t" - "cmpl $-1,%2\n\t" - "jne 1b\n" - "3:\tsubl %1,%0" - :"=a" (__res) - :"c" (s),"d" (count) - :"dx"); -return __res; -} -/* end of additional stuff */ - -#define __HAVE_ARCH_STRTOK -extern inline char * strtok(char * s,const char * ct) -{ -register char * __res; -__asm__ __volatile__( - "testl %1,%1\n\t" - "jne 1f\n\t" - "testl %0,%0\n\t" - "je 8f\n\t" - "movl %0,%1\n" - "1:\txorl %0,%0\n\t" - "movl $-1,%%ecx\n\t" - "xorl %%eax,%%eax\n\t" - "cld\n\t" - "movl %4,%%edi\n\t" - "repne\n\t" - "scasb\n\t" - "notl %%ecx\n\t" - "decl %%ecx\n\t" - "je 7f\n\t" /* empty delimiter-string */ - "movl %%ecx,%%edx\n" - "2:\tlodsb\n\t" - "testb %%al,%%al\n\t" - "je 7f\n\t" - "movl %4,%%edi\n\t" - "movl %%edx,%%ecx\n\t" - "repne\n\t" - "scasb\n\t" - "je 2b\n\t" - "decl %1\n\t" - "cmpb $0,(%1)\n\t" - "je 7f\n\t" - "movl %1,%0\n" - "3:\tlodsb\n\t" - "testb %%al,%%al\n\t" - "je 5f\n\t" - "movl %4,%%edi\n\t" - "movl %%edx,%%ecx\n\t" - "repne\n\t" - "scasb\n\t" - "jne 3b\n\t" - "decl %1\n\t" - "cmpb $0,(%1)\n\t" - "je 5f\n\t" - "movb $0,(%1)\n\t" - "incl %1\n\t" - "jmp 6f\n" - "5:\txorl %1,%1\n" - "6:\tcmpb $0,(%0)\n\t" - "jne 7f\n\t" - "xorl %0,%0\n" - "7:\ttestl %0,%0\n\t" - "jne 8f\n\t" - "movl %0,%1\n" - "8:" - :"=b" (__res),"=S" (___strtok) - :"0" (___strtok),"1" (s),"g" (ct) - :"ax","cx","dx","di","memory"); -return __res; -} - -#define __memcpy_c(d,s,count) \ -((count%4==0) ? \ - __memcpy_by4((d),(s),(count)) : \ - ((count%2==0) ? \ - __memcpy_by2((d),(s),(count)) : \ - __memcpy_g((d),(s),(count)))) - -#define __HAVE_ARCH_MEMCPY -#define memcpy(d,s,count) \ -(count == 0 \ - ? d \ - : __builtin_constant_p(count) \ - ? __memcpy_c((d),(s),(count)) \ - : __memcpy_g((d),(s),(count))) - -/* - * These ought to get tweaked to do some cache priming. - */ - -extern inline void * __memcpy_by4(void * to, const void * from, size_t n) -{ -register void *tmp = (void *)to; -register int dummy1,dummy2; -__asm__ __volatile__ ( - "\n1:\tmovl (%2),%0\n\t" - "addl $4,%2\n\t" - "movl %0,(%1)\n\t" - "addl $4,%1\n\t" - "decl %3\n\t" - "jnz 1b" - :"=r" (dummy1), "=r" (tmp), "=r" (from), "=r" (dummy2) - :"1" (tmp), "2" (from), "3" (n/4) - :"memory"); -return to; -} - -extern inline void * __memcpy_by2(void * to, const void * from, size_t n) -{ -register void *tmp = (void *)to; -register int dummy1,dummy2; -__asm__ __volatile__ ( - "shrl $1,%3\n\t" - "jz 2f\n" /* only a word */ - "1:\tmovl (%2),%0\n\t" - "addl $4,%2\n\t" - "movl %0,(%1)\n\t" - "addl $4,%1\n\t" - "decl %3\n\t" - "jnz 1b\n" - "2:\tmovw (%2),%w0\n\t" - "movw %w0,(%1)" - :"=r" (dummy1), "=r" (tmp), "=r" (from), "=r" (dummy2) - :"1" (tmp), "2" (from), "3" (n/2) - :"memory"); -return to; -} - -extern inline void * __memcpy_g(void * to, const void * from, size_t n) -{ -register void *tmp = (void *)to; -__asm__ __volatile__ ( - "cld\n\t" - "shrl $1,%%ecx\n\t" - "jnc 1f\n\t" - "movsb\n" - "1:\tshrl $1,%%ecx\n\t" - "jnc 2f\n\t" - "movsw\n" - "2:\trep\n\t" - "movsl" - : /* no output */ - :"c" (n),"D" ((long) tmp),"S" ((long) from) - :"cx","di","si","memory"); -return to; -} - - -#define __HAVE_ARCH_MEMMOVE -extern inline void * memmove(void * dest,const void * src, size_t n) -{ -register void *tmp = (void *)dest; -if (dest<src) -__asm__ __volatile__ ( - "cld\n\t" - "rep\n\t" - "movsb" - : /* no output */ - :"c" (n),"S" (src),"D" (tmp) - :"cx","si","di"); -else -__asm__ __volatile__ ( - "std\n\t" - "rep\n\t" - "movsb\n\t" - "cld\n\t" - : /* no output */ - :"c" (n), "S" (n-1+(const char *)src), "D" (n-1+(char *)tmp) - :"cx","si","di","memory"); -return dest; -} - -extern inline int memcmp(const void * cs,const void * ct,size_t count) -{ -register int __res; -__asm__ __volatile__( - "cld\n\t" - "repe\n\t" - "cmpsb\n\t" - "je 1f\n\t" - "sbbl %0,%0\n\t" - "orb $1,%b0\n" - "1:" - :"=abd" (__res):"0" (0),"S" (cs),"D" (ct),"c" (count) - :"si","di","cx"); -return __res; -} - -#define __HAVE_ARCH_MEMCHR -extern inline void * memchr(const void * cs,int c,size_t count) -{ -register void * __res; -if (!count) - return NULL; -__asm__ __volatile__( - "cld\n\t" - "repne\n\t" - "scasb\n\t" - "je 1f\n\t" - "movl $1,%0\n" - "1:\tdecl %0" - :"=D" (__res):"a" (c),"D" (cs),"c" (count) - :"cx"); -return __res; -} - -#define __memset_cc(s,c,count) \ -((count%4==0) ? \ - __memset_cc_by4((s),(c),(count)) : \ - ((count%2==0) ? \ - __memset_cc_by2((s),(c),(count)) : \ - __memset_cg((s),(c),(count)))) - -#define __memset_gc(s,c,count) \ -((count%4==0) ? \ - __memset_gc_by4((s),(c),(count)) : \ - ((count%2==0) ? \ - __memset_gc_by2((s),(c),(count)) : \ - __memset_gg((s),(c),(count)))) - -#define __HAVE_ARCH_MEMSET -#define memset(s,c,count) \ -(count == 0 \ - ? s \ - : __builtin_constant_p(c) \ - ? __builtin_constant_p(count) \ - ? __memset_cc((s),(c),(count)) \ - : __memset_cg((s),(c),(count)) \ - : __builtin_constant_p(count) \ - ? __memset_gc((s),(c),(count)) \ - : __memset_gg((s),(c),(count))) - -extern inline void * __memset_cc_by4(void * s, char c, size_t count) -{ -/* - * register char *tmp = s; - */ -register char *tmp = (char *)s; -register int dummy; -__asm__ __volatile__ ( - "\n1:\tmovl %2,(%0)\n\t" - "addl $4,%0\n\t" - "decl %1\n\t" - "jnz 1b" - :"=r" (tmp), "=r" (dummy) - :"r" (0x01010101UL * (unsigned char) c), "0" (tmp), "1" (count/4) - :"memory"); -return s; -} - -extern inline void * __memset_cc_by2(void * s, char c, size_t count) -{ -register void *tmp = (void *)s; -register int dummy; -__asm__ __volatile__ ( - "shrl $1,%1\n\t" /* may be divisible also by 4 */ - "jz 2f\n" - "\n1:\tmovl %2,(%0)\n\t" - "addl $4,%0\n\t" - "decl %1\n\t" - "jnz 1b\n" - "2:\tmovw %w2,(%0)" - :"=r" (tmp), "=r" (dummy) - :"r" (0x01010101UL * (unsigned char) c), "0" (tmp), "1" (count/2) - :"memory"); -return s; -} - -extern inline void * __memset_gc_by4(void * s, char c, size_t count) -{ -register void *tmp = (void *)s; -register int dummy; -__asm__ __volatile__ ( - "movb %b0,%h0\n" - "pushw %w0\n\t" - "shll $16,%k0\n\t" - "popw %w0\n" - "1:\tmovl %k0,(%1)\n\t" - "addl $4,%1\n\t" - "decl %2\n\t" - "jnz 1b\n" - :"=q" (c), "=r" (tmp), "=r" (dummy) - :"0" ((unsigned) c), "1" (tmp), "2" (count/4) - :"memory"); -return s; -} - -extern inline void * __memset_gc_by2(void * s, char c, size_t count) -{ -register void *tmp = (void *)s; -register int dummy1,dummy2; -__asm__ __volatile__ ( - "movb %b0,%h0\n\t" - "shrl $1,%2\n\t" /* may be divisible also by 4 */ - "jz 2f\n\t" - "pushw %w0\n\t" - "shll $16,%k0\n\t" - "popw %w0\n" - "1:\tmovl %k0,(%1)\n\t" - "addl $4,%1\n\t" - "decl %2\n\t" - "jnz 1b\n" - "2:\tmovw %w0,(%1)" - :"=q" (dummy1), "=r" (tmp), "=r" (dummy2) - :"0" ((unsigned) c), "1" (tmp), "2" (count/2) - :"memory"); -return s; -} - -extern inline void * __memset_cg(void * s, char c, size_t count) -{ -register void *tmp = (void *)s; -__asm__ __volatile__ ( - "shrl $1,%%ecx\n\t" - "cld\n\t" - "rep\n\t" - "stosw\n\t" - "jnc 1f\n\t" - "movb %%al,(%%edi)\n" - "1:" - : /* no output */ - :"c" (count),"D" (tmp), "a" (0x0101U * (unsigned char) c) - :"cx","di","memory"); -return s; -} - -extern inline void * __memset_gg(void * s,char c,size_t count) -{ -register void *tmp = (void *)s; -__asm__ __volatile__ ( - "movb %%al,%%ah\n\t" - "shrl $1,%%ecx\n\t" - "cld\n\t" - "rep\n\t" - "stosw\n\t" - "jnc 1f\n\t" - "movb %%al,(%%edi)\n" - "1:" - : /* no output */ - :"c" (count),"D" (tmp), "a" (c) - :"cx","di","memory"); -return s; -} - - -/* - * find the first occurrence of byte 'c', or 1 past the area if none - */ -#define __HAVE_ARCH_MEMSCAN -extern inline void * memscan(void * addr, int c, size_t size) -{ - if (!size) - return addr; - __asm__("cld - repnz; scasb - jnz 1f - dec %%edi -1: " - : "=D" (addr), "=c" (size) - : "0" (addr), "1" (size), "a" (c)); - return addr; -} - -#endif |