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authorUlrich Drepper <drepper@redhat.com>1997-09-16 00:42:43 +0000
committerUlrich Drepper <drepper@redhat.com>1997-09-16 00:42:43 +0000
commit61eb22d3a8e9bb9c339bdbe907a85656823f4c7e (patch)
treef0cc84f2036c52f081839b17a4608fb2277b2178 /sysdeps/i386/i486
parent4a9332b3765e77fecb06d7135e2fefa3d7d28806 (diff)
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1997-09-16 02:14 Ulrich Drepper <drepper@cygnus.com> Implementation of Hesiod NSS module by Mark Kettenis. * hesiod/Makefile: New file. * hesiod/hesiod.c: New file. * hesiod/hesiod.h: New file. * hesiod/hesiod_p.h: New file. * hesiod/libnss_hesiod.map: New file. * hesiod/nss_hesiod/hesiod-grp.c: New file. * hesiod/nss_hesiod/hesiod-pwd.c: New file. * hesiod/nss_hesiod/hesiod-service.c: New file. * sysdeps/unix/inet/Subdirs: Add hesiod. * shlib-versions: Add version number for libnss_hesiod. * libio/iolibio.h: Remove definition of _IO_* macros. * libio/fileops.c: Define close, fstat, lseek, read, and write as macros to use __ protected versions. Use those functions instead of _IO_* functions. * libio/iopopen.c: Define _IO_close to close. * manual/math.texi: Explain the use of the optimizing inline functions. Describe rand_r function and tell about SysV RNGs in introduction. * resolv/res_send.c (res_send): Use socklen_t type for `fromlen' variable. * string/Makefile (tests): Add noinl-tester. * string/noinl-tester.c: New file. * string/tester.c: Add more stpcpy tests for constant arguments for all short lengths. * string/string.h: Always declare __bzero. Describe __NO_STRING_INLINES. Always include <bits/string.h>. * string/bits/string2.h: Add warning about direct use. Change __strcpy_small and __stpcpy_small implementation to use macros and provide alternative for platforms which cannot do unaligned stores. * sysdeps/i386/bits/string.h: Don't define anything is __NO_STRING_INLINES is defined. * sysdeps/i386/i486/bits/string.h: Change __strcpy_small and __stpcpy_small implementation to use macros and provide alternative for platforms which cannot do unaligned stores. * sysdeps/alpha/bzero.S: Define bzero as weak alias of __bzero. * sysdeps/generic/bzero.c: Likewise. * sysdeps/i386/bzero.c: Likewise. * sysdeps/i386/i586/bzero.S: Likewise. * sysdeps/vax/bzero.s: Likewise. * sysdeps/generic/bits/select.h: Don't use ugly casts to access array. * sysdeps/i386/bits/select.h: Likewise. * sysdeps/i386/fpu/bits/mathinline.c (__finite): Relax register constraints a bit. Don't define and test for _BITS_MATHINLINE_H. Emit warning if used directly and not through math.h. * sysdeps/i386/i486/atomicity.h: Change return type of compare_and_swap to char to get better code. Fix typo. * sysdeps/stub/atomicity.h: Fix typo. 1997-09-14 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/generic/stpcpy.c: #undef stpcpy and __stpcpy. 1997-09-14 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * string/bits/string2.h: Add prototypes to avoid warning. 1997-09-14 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * string/bits/string2.h (strsep): Fix handling of empty REJECT. (__strsep_1c): Handle NULL and empty string. (__strsep_g): Likewise. 1997-09-13 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * catgets/Makefile (extra-objs): Set this instead of generated. * md5-crypt/Makefile (extra-objs): Add all object file variants of onlymd5-entry. 1997-09-12 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/generic/sysd-stdio.c (__stdio_read): Fix typo in last change. 1997-09-12 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/m68k/m68020/atomicity.h: New file. 1997-09-15 05:11 Ulrich Drepper <drepper@cygnus.com> * posix/Makefile (distribute): Add globtest.c and globtest.sh. Compile and run globtest if not cross-compiling. * posix/globtest.c: New file. * posix/globtest.sh: New file. * posix/glob.c: Pretty print preprocessor stuff. (glob_in_dir): If PATTERN is not really a pattern still check whether it is a real file in the current directory and return error if not. Reported by Eugene Mamchits <eugin@ips.ras.ru>. * libio/fileops.c (_IO_file_sync): Acquire lock before doing the work. * libio/ioseekoff.c (_IO_seekoff): Likewise. * libio/ioseekpos.c (_IO_seekpos): Likewise. 1997-09-13 18:06 Ulrich Drepper <drepper@cygnus.com> * configure.in: Prevent configuration for unsupported platforms. 1997-09-13 04:07 Ulrich Drepper <drepper@cygnus.com> * elf/rtld.c (dl_main): Make sure we always have a file argument by testing for < 2 arguments after recognizing the options. 1997-09-12 11:47 Fila Kolodny <fila@ibi.com> * string/bits/string2.h (__strsep_1c): Cast out const from __retval. (__strsep_g): Likewise.
Diffstat (limited to 'sysdeps/i386/i486')
-rw-r--r--sysdeps/i386/i486/atomicity.h4
-rw-r--r--sysdeps/i386/i486/bits/string.h160
2 files changed, 120 insertions, 44 deletions
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 */