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Fix handling of tail bytes of buffer in SSE2/SSSE3 x86-64 version strn{,case}cmp

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This commit is contained in:
Ulrich Drepper 2010-10-03 22:10:30 -04:00
parent cf7a1eb81d
commit 45db99c7d0
4 changed files with 133 additions and 53 deletions
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8
ChangeLog
View File

@ -1,3 +1,11 @@
2010-10-03 Ulrich Drepper <drepper@gmail.com>
[BZ #12077]
* sysdeps/x86_64/strcmp.S: Fix handling of remaining bytes in buffer
for strncmp and strncasecmp.
* string/stratcliff.c: Add tests for strcmp and strncmp.
* wcsmbs/wcsatcliff.c: Adjust for stratcliff change.
2010-09-28 Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
* sysdeps/sh/sh4/fpu/fpu_control.h: Add 'extern "C"' protection to

72
string/stratcliff.c
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@ -1,5 +1,6 @@
/* Test for string function add boundaries of usable memory.
Copyright (C) 1996,1997,1999-2003,2007, 2009 Free Software Foundation, Inc.
Copyright (C) 1996,1997,1999-2003,2007,2009,2010
Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
@ -47,6 +48,8 @@
# define MEMCPY memcpy
# define MEMPCPY mempcpy
# define MEMCHR memchr
# define STRCMP strcmp
# define STRNCMP strncmp
#endif
@ -279,6 +282,73 @@ do_test (void)
}
}
/* strcmp/wcscmp tests */
for (outer = 1; outer < 32; ++outer)
for (middle = 0; middle < 16; ++middle)
{
MEMSET (adr + middle, L('T'), 256);
adr[256] = L('\0');
MEMSET (dest + nchars - outer, L('T'), outer - 1);
dest[nchars - 1] = L('\0');
if (STRCMP (adr + middle, dest + nchars - outer) <= 0)
{
printf ("%s 1 flunked for outer = %d, middle = %d\n",
STRINGIFY (STRCMP), outer, middle);
result = 1;
}
if (STRCMP (dest + nchars - outer, adr + middle) >= 0)
{
printf ("%s 2 flunked for outer = %d, middle = %d\n",
STRINGIFY (STRCMP), outer, middle);
result = 1;
}
}
/* strncmp/wcsncmp tests */
for (outer = 1; outer < 32; ++outer)
for (middle = 0; middle < 16; ++middle)
{
MEMSET (adr + middle, L('T'), 256);
adr[256] = L('\0');
MEMSET (dest + nchars - outer, L('T'), outer - 1);
dest[nchars - 1] = L('U');
for (inner = 0; inner < outer; ++inner)
{
if (STRNCMP (adr + middle, dest + nchars - outer, inner) != 0)
{
printf ("%s 1 flunked for outer = %d, middle = %d, "
"inner = %d\n",
STRINGIFY (STRNCMP), outer, middle, inner);
result = 1;
}
if (STRNCMP (dest + nchars - outer, adr + middle, inner) != 0)
{
printf ("%s 2 flunked for outer = %d, middle = %d, "
"inner = %d\n",
STRINGIFY (STRNCMP), outer, middle, inner);
result = 1;
}
}
if (STRNCMP (adr + middle, dest + nchars - outer, outer) >= 0)
{
printf ("%s 1 flunked for outer = %d, middle = %d, full\n",
STRINGIFY (STRNCMP), outer, middle);
result = 1;
}
if (STRNCMP (dest + nchars - outer, adr + middle, outer) <= 0)
{
printf ("%s 2 flunked for outer = %d, middle = %d, full\n",
STRINGIFY (STRNCMP), outer, middle);
result = 1;
}
}
/* strncpy/wcsncpy tests */
adr[nchars - 1] = L('T');
for (outer = nchars; outer >= MAX (0, nchars - 128); --outer)

32
sysdeps/x86_64/strcmp.S
View File

@ -458,7 +458,7 @@ LABEL(nibble_ashr_1):
jnz LABEL(ashr_1_exittail) /* find null char*/
# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
cmp $14, %r11
cmp $15, %r11
jbe LABEL(ashr_1_exittail)
# endif
@ -586,7 +586,7 @@ LABEL(nibble_ashr_2):
jnz LABEL(ashr_2_exittail)
# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
cmp $13, %r11
cmp $14, %r11
jbe LABEL(ashr_2_exittail)
# endif
@ -711,7 +711,7 @@ LABEL(nibble_ashr_3):
jnz LABEL(ashr_3_exittail)
# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
cmp $12, %r11
cmp $13, %r11
jbe LABEL(ashr_3_exittail)
# endif
@ -836,7 +836,7 @@ LABEL(nibble_ashr_4):
jnz LABEL(ashr_4_exittail)
# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
cmp $11, %r11
cmp $12, %r11
jbe LABEL(ashr_4_exittail)
# endif
@ -961,7 +961,7 @@ LABEL(nibble_ashr_5):
jnz LABEL(ashr_5_exittail)
# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
cmp $10, %r11
cmp $11, %r11
jbe LABEL(ashr_5_exittail)
# endif
@ -1086,7 +1086,7 @@ LABEL(nibble_ashr_6):
jnz LABEL(ashr_6_exittail)
# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
cmp $9, %r11
cmp $10, %r11
jbe LABEL(ashr_6_exittail)
# endif
@ -1211,7 +1211,7 @@ LABEL(nibble_ashr_7):
jnz LABEL(ashr_7_exittail)
# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
cmp $8, %r11
cmp $9, %r11
jbe LABEL(ashr_7_exittail)
# endif
@ -1336,7 +1336,7 @@ LABEL(nibble_ashr_8):
jnz LABEL(ashr_8_exittail)
# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
cmp $7, %r11
cmp $8, %r11
jbe LABEL(ashr_8_exittail)
# endif
@ -1461,7 +1461,7 @@ LABEL(nibble_ashr_9):
jnz LABEL(ashr_9_exittail)
# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
cmp $6, %r11
cmp $7, %r11
jbe LABEL(ashr_9_exittail)
# endif
@ -1586,7 +1586,7 @@ LABEL(nibble_ashr_10):
jnz LABEL(ashr_10_exittail)
# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
cmp $5, %r11
cmp $6, %r11
jbe LABEL(ashr_10_exittail)
# endif
@ -1711,7 +1711,7 @@ LABEL(nibble_ashr_11):
jnz LABEL(ashr_11_exittail)
# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
cmp $4, %r11
cmp $5, %r11
jbe LABEL(ashr_11_exittail)
# endif
@ -1836,7 +1836,7 @@ LABEL(nibble_ashr_12):
jnz LABEL(ashr_12_exittail)
# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
cmp $3, %r11
cmp $4, %r11
jbe LABEL(ashr_12_exittail)
# endif
@ -1961,7 +1961,7 @@ LABEL(nibble_ashr_13):
jnz LABEL(ashr_13_exittail)
# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
cmp $2, %r11
cmp $3, %r11
jbe LABEL(ashr_13_exittail)
# endif
@ -2086,7 +2086,7 @@ LABEL(nibble_ashr_14):
jnz LABEL(ashr_14_exittail)
# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
cmp $1, %r11
cmp $2, %r11
jbe LABEL(ashr_14_exittail)
# endif
@ -2213,8 +2213,8 @@ LABEL(nibble_ashr_15):
jnz LABEL(ashr_15_exittail)
# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
test %r11, %r11
je LABEL(ashr_15_exittail)
cmpq $1, %r11
jbe LABEL(ashr_15_exittail)
# endif
pxor %xmm0, %xmm0

2
wcsmbs/wcsatcliff.c
View File

@ -16,6 +16,8 @@
#define MEMCPY wmemcpy
#define MEMPCPY wmempcpy
#define MEMCHR wmemchr
#define STRCMP wcscmp
#define STRNCMP wcsncmp
#include "../string/stratcliff.c"