diff options
Diffstat (limited to 'sysdeps/i386')
| -rw-r--r-- | sysdeps/i386/bits/select.h | 3 | ||||
| -rw-r--r-- | sysdeps/i386/bits/string.h | 14 | ||||
| -rw-r--r-- | sysdeps/i386/bzero.c | 3 | ||||
| -rw-r--r-- | sysdeps/i386/fpu/bits/mathinline.h | 9 | ||||
| -rw-r--r-- | sysdeps/i386/i486/atomicity.h | 4 | ||||
| -rw-r--r-- | sysdeps/i386/i486/bits/string.h | 160 | ||||
| -rw-r--r-- | sysdeps/i386/i586/bzero.S | 3 |
7 files changed, 140 insertions, 56 deletions
diff --git a/sysdeps/i386/bits/select.h b/sysdeps/i386/bits/select.h index edcb562945..34d2b0b27a 100644 --- a/sysdeps/i386/bits/select.h +++ b/sysdeps/i386/bits/select.h @@ -58,8 +58,9 @@ # define __FD_ZERO(set) \ do { \ unsigned int __i; \ + __fd_mask *__arr = (set); \ for (__i = 0; __i < sizeof (__fd_set) / sizeof (__fd_mask); ++__i) \ - ((__fd_mask *) set)[__i] = 0; \ + __arr->fds_bits[__i] = 0; \ } while (0) # define __FD_SET(d, set) ((set)->fds_bits[__FDELT (d)] |= __FDMASK (d)) # define __FD_CLR(d, set) ((set)->fds_bits[__FDELT (d)] &= ~__FDMASK (d)) diff --git a/sysdeps/i386/bits/string.h b/sysdeps/i386/bits/string.h index 2931684781..c6deb2b6a4 100644 --- a/sysdeps/i386/bits/string.h +++ b/sysdeps/i386/bits/string.h @@ -18,11 +18,17 @@ Boston, MA 02111-1307, USA. */ #ifndef _STRING_H -#error "Never use <bits/string.h> directly; include <string.h> instead." +# error "Never use <bits/string.h> directly; include <string.h> instead." #endif -/* We only provide optimizations for the GNU CC. */ -#if defined __GNUC__ && __GNUC__ >= 2 +/* The ix86 processors can access unaligned multi-byte variables. */ +#define _STRING_ARCH_unaligned 1 + + +/* We only provide optimizations if the user selects them and if + GNU CC is used. */ +#if !defined __NO_STRING_INLINES && defined __USE_STRING_INLINES \ + && defined __GNUC__ && __GNUC__ >= 2 #ifdef __cplusplus # define __STRING_INLINE inline @@ -741,4 +747,4 @@ strstr (__const char *__haystack, __const char *__needle) #undef __STRING_INLINE -#endif /* GNU CC */ +#endif /* use string inlines && GNU CC */ diff --git a/sysdeps/i386/bzero.c b/sysdeps/i386/bzero.c index 5cc5989f90..99f2352dc6 100644 --- a/sysdeps/i386/bzero.c +++ b/sysdeps/i386/bzero.c @@ -26,7 +26,7 @@ #ifdef __GNUC__ void -bzero (dstpp, len) +__bzero (dstpp, len) void *dstpp; size_t len; { @@ -75,6 +75,7 @@ bzero (dstpp, len) "0" (dstp), "c" (len), "a" (x) : "cx"); } +weak_alias (__bzero, bzero) #else #include <sysdeps/generic/bzero.c> diff --git a/sysdeps/i386/fpu/bits/mathinline.h b/sysdeps/i386/fpu/bits/mathinline.h index 55e9171459..edb6ee01d7 100644 --- a/sysdeps/i386/fpu/bits/mathinline.h +++ b/sysdeps/i386/fpu/bits/mathinline.h @@ -18,8 +18,9 @@ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ -#ifndef _BITS_MATHINLINE_H -#define _BITS_MATHINLINE_H 1 +#ifndef _MATH_H +# error "Never use <bits/mathinline.h> directly; include <math.h> instead." +#endif #if defined __USE_ISOC9X && defined __GNUC__ && __GNUC__ >= 2 @@ -518,7 +519,7 @@ __finite (double __x) ("orl $0x800fffff, %0\n\t" "incl %0\n\t" "shrl $31, %0" - : "=q" (__result) : "0" (((int *) &__x)[1]) : "cc"); + : "=r" (__result) : "0" (((int *) &__x)[1]) : "cc"); return __result; } @@ -542,5 +543,3 @@ __inline_mathcode (__acosh1p, __x, \ #endif /* Not gcc <= 2.7. */ #endif /* __NO_MATH_INLINES */ #endif /* __GNUC__ */ - -#endif /* _BITS_MATHINLINE_H */ diff --git a/sysdeps/i386/i486/atomicity.h b/sysdeps/i386/i486/atomicity.h index 98a2531365..7157bc33d8 100644 --- a/sysdeps/i386/i486/atomicity.h +++ b/sysdeps/i386/i486/atomicity.h @@ -1,4 +1,4 @@ -/* Low-level functions for atomitc operations. ix86 version, x >= 4. +/* Low-level functions for atomic operations. ix86 version, x >= 4. Copyright (C) 1997 Free Software Foundation, Inc. This file is part of the GNU C Library. @@ -41,7 +41,7 @@ atomic_add (volatile uint32_t *mem, int val) : : "ir" (val), "m" (*mem) : "memory"); } -static inline int +static inline char __attribute__ ((unused)) compare_and_swap (volatile long int *p, long int oldval, long int newval) { diff --git a/sysdeps/i386/i486/bits/string.h b/sysdeps/i386/i486/bits/string.h index 770f5c1e15..5e4abbc3e5 100644 --- a/sysdeps/i386/i486/bits/string.h +++ b/sysdeps/i386/i486/bits/string.h @@ -18,11 +18,17 @@ Boston, MA 02111-1307, USA. */ #ifndef _STRING_H -#error "Never use <bits/string.h> directly; include <string.h> instead." +# error "Never use <bits/string.h> directly; include <string.h> instead." #endif -/* We only provide optimizations for the GNU CC. */ -#if defined __GNUC__ && __GNUC__ >= 2 +/* The ix86 processors can access unaligned multi-byte variables. */ +#define _STRING_ARCH_unaligned 1 + + +/* We only provide optimizations if the user selects them and if + GNU CC is used. */ +#if !defined __NO_STRING_INLINES && defined __USE_STRING_INLINES \ + && defined __GNUC__ && __GNUC__ >= 2 #ifdef __cplusplus # define __STRING_INLINE inline @@ -30,6 +36,13 @@ # define __STRING_INLINE extern __inline #endif +/* The macros are used in some of the optimized implementations below. */ +#define __STRING_SMALL_GET16(src, idx) \ + (((src)[idx + 1] << 8) | (src)[idx]) +#define __STRING_SMALL_GET32(src, idx) \ + ((((src)[idx + 3] << 8 | (src)[idx + 2]) << 8 \ + | (src)[idx + 1]) << 8 | (src)[idx]) + /* Copy N bytes of SRC to DEST. */ #define _HAVE_STRING_ARCH_memcpy 1 @@ -355,9 +368,59 @@ __strlen_g (__const char *__str) #define _HAVE_STRING_ARCH_strcpy 1 #define strcpy(dest, src) \ (__extension__ (__builtin_constant_p (src) \ - ? (char *) memcpy (dest, src, strlen (src) + 1) \ + ? (sizeof (src[0]) == 1 && strlen (src) + 1 <= 8 \ + ? __strcpy_small (dest, src, strlen (src) + 1) \ + : (char *) memcpy (dest, src, strlen (src) + 1)) \ : __strcpy_g (dest, src))) +# define __strcpy_small(dest, src, srclen) \ + (__extension__ ({ char *__retval = (dest); \ + char *__cp = __retval; \ + switch (srclen) \ + { \ + case 1: \ + *((unsigned char *) __cp) = '\0'; \ + break; \ + case 2: \ + *((__uint16_t *) __cp) = \ + __STRING_SMALL_GET16 (src, 0); \ + break; \ + case 3: \ + *((__uint16_t *) __cp)++ = \ + __STRING_SMALL_GET16 (src, 0); \ + *((unsigned char *) __cp) = '\0'; \ + break; \ + case 4: \ + *((__uint32_t *) __cp) = \ + __STRING_SMALL_GET32 (src, 0); \ + break; \ + case 5: \ + *((__uint32_t *) __cp)++ = \ + __STRING_SMALL_GET32 (src, 0); \ + *((unsigned char *) __cp) = '\0'; \ + break; \ + case 6: \ + *((__uint32_t *) __cp)++ = \ + __STRING_SMALL_GET32 (src, 0); \ + *((__uint16_t *) __cp) = \ + __STRING_SMALL_GET16 (src, 4); \ + break; \ + case 7: \ + *((__uint32_t *) __cp)++ = \ + __STRING_SMALL_GET32 (src, 0); \ + *((__uint16_t *) __cp)++ = \ + __STRING_SMALL_GET16 (src, 4); \ + *((unsigned char *) __cp) = '\0'; \ + break; \ + case 8: \ + *((__uint32_t *) __cp)++ = \ + __STRING_SMALL_GET32 (src, 0); \ + *((__uint32_t *) __cp) = \ + __STRING_SMALL_GET32 (src, 4); \ + break; \ + } \ + __retval; })) + __STRING_INLINE char * __strcpy_g (char *__dest, __const char *__src) { @@ -398,43 +461,56 @@ __strcpy_g (char *__dest, __const char *__src) /* In glibc itself we use this symbol for namespace reasons. */ # define stpcpy(dest, src) __stpcpy (dest, src) -__STRING_INLINE char * -__stpcpy_small (char *__dest, __const char __src[], size_t __srclen) -{ - register char *__tmp = __dest; - switch (__srclen) - { - case 7: - *((unsigned short int *) __tmp)++ = *((unsigned short int *) __src)++; - case 5: - *((unsigned int *) __tmp)++ = *((unsigned int *) __src)++; - *((unsigned char *) __tmp) = '\0'; - return __tmp; - - case 8: - *((unsigned int *) __tmp)++ = *((unsigned int *) __src)++; - case 4: - *((unsigned int *) __tmp) = *((unsigned int *) __src); - return __tmp + 3; - - case 6: - *((unsigned int *) __tmp)++ = *((unsigned int *) __src)++; - case 2: - *((unsigned short int *) __tmp) = *((unsigned short int *) __src); - return __tmp + 1; - - case 3: - *((unsigned short int *) __tmp)++ = *((unsigned short int *) __src)++; - case 1: - *((unsigned char *) __tmp) = '\0'; - return __tmp; - - default: - break; - } - /* This should never happen. */ - return NULL; -} +# define __stpcpy_small(dest, src, srclen) \ + (__extension__ ({ char *__cp = (dest); \ + switch (srclen) \ + { \ + case 1: \ + *((unsigned char *) __cp) = '\0'; \ + break; \ + case 2: \ + *((__uint16_t *) __cp) = \ + __STRING_SMALL_GET16 (src, 0); \ + ++cp; \ + break; \ + case 3: \ + *((__uint16_t *) __cp)++ = \ + __STRING_SMALL_GET16 (src, 0); \ + *((unsigned char *) __cp) = '\0'; \ + break; \ + case 4: \ + *((__uint32_t *) __cp) = \ + __STRING_SMALL_GET32 (src, 0); \ + cp += 3; \ + break; \ + case 5: \ + *((__uint32_t *) __cp)++ = \ + __STRING_SMALL_GET32 (src, 0); \ + *((unsigned char *) __cp) = '\0'; \ + break; \ + case 6: \ + *((__uint32_t *) __cp)++ = \ + __STRING_SMALL_GET32 (src, 0); \ + *((__uint16_t *) __cp) = \ + __STRING_SMALL_GET16 (src, 4); \ + ++cp; \ + break; \ + case 7: \ + *((__uint32_t *) __cp)++ = \ + __STRING_SMALL_GET32 (src, 0); \ + *((__uint16_t *) __cp)++ = \ + __STRING_SMALL_GET16 (src, 4); \ + *((unsigned char *) __cp) = '\0'; \ + break; \ + case 8: \ + *((__uint32_t *) __cp)++ = \ + __STRING_SMALL_GET32 (src, 0); \ + *((__uint32_t *) __cp) = \ + __STRING_SMALL_GET32 (src, 4); \ + cp += 3; \ + break; \ + } \ + __cp; })) __STRING_INLINE char * __mempcpy_by4 (char *__dest, __const char *__src, size_t __srclen) @@ -1458,4 +1534,4 @@ __strstr_g (__const char *__haystack, __const char *__needle) #undef __STRING_INLINE -#endif /* GNU CC */ +#endif /* use string inlines && GNU CC */ diff --git a/sysdeps/i386/i586/bzero.S b/sysdeps/i386/i586/bzero.S index 2c75103492..84d2f709c1 100644 --- a/sysdeps/i386/i586/bzero.S +++ b/sysdeps/i386/i586/bzero.S @@ -1,2 +1,3 @@ -#define memset bzero +#define memset __bzero #include <sysdeps/i386/i586/memset.S> +weak_alias (__bzero, bzero) |