Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
+#include <stdint.h>
#include <string.h>
#include <ctype.h>
/* states: S_N: normal, S_I: comparing integral part, S_F: comparing
fractionnal parts, S_Z: idem but with leading Zeroes only */
#define S_N 0x0
-#define S_I 0x4
-#define S_F 0x8
-#define S_Z 0xC
+#define S_I 0x3
+#define S_F 0x6
+#define S_Z 0x9
/* result_type: CMP: return diff; LEN: compare using len_diff/diff */
#define CMP 2
{
const unsigned char *p1 = (const unsigned char *) s1;
const unsigned char *p2 = (const unsigned char *) s2;
- unsigned char c1, c2;
- int state;
- int diff;
- /* Symbol(s) 0 [1-9] others (padding)
- Transition (10) 0 (01) d (00) x (11) - */
- static const unsigned int next_state[] =
+ /* Symbol(s) 0 [1-9] others
+ Transition (10) 0 (01) d (00) x */
+ static const uint8_t next_state[] =
{
- /* state x d 0 - */
- /* S_N */ S_N, S_I, S_Z, S_N,
- /* S_I */ S_N, S_I, S_I, S_I,
- /* S_F */ S_N, S_F, S_F, S_F,
- /* S_Z */ S_N, S_F, S_Z, S_Z
+ /* state x d 0 */
+ /* S_N */ S_N, S_I, S_Z,
+ /* S_I */ S_N, S_I, S_I,
+ /* S_F */ S_N, S_F, S_F,
+ /* S_Z */ S_N, S_F, S_Z
};
- static const int result_type[] =
+ static const int8_t result_type[] =
{
- /* state x/x x/d x/0 x/- d/x d/d d/0 d/-
- 0/x 0/d 0/0 0/- -/x -/d -/0 -/- */
-
- /* S_N */ CMP, CMP, CMP, CMP, CMP, LEN, CMP, CMP,
- CMP, CMP, CMP, CMP, CMP, CMP, CMP, CMP,
- /* S_I */ CMP, -1, -1, CMP, +1, LEN, LEN, CMP,
- +1, LEN, LEN, CMP, CMP, CMP, CMP, CMP,
- /* S_F */ CMP, CMP, CMP, CMP, CMP, CMP, CMP, CMP,
- CMP, CMP, CMP, CMP, CMP, CMP, CMP, CMP,
- /* S_Z */ CMP, +1, +1, CMP, -1, CMP, CMP, CMP,
- -1, CMP, CMP, CMP
+ /* state x/x x/d x/0 d/x d/d d/0 0/x 0/d 0/0 */
+
+ /* S_N */ CMP, CMP, CMP, CMP, LEN, CMP, CMP, CMP, CMP,
+ /* S_I */ CMP, -1, -1, +1, LEN, LEN, +1, LEN, LEN,
+ /* S_F */ CMP, CMP, CMP, CMP, CMP, CMP, CMP, CMP, CMP,
+ /* S_Z */ CMP, +1, +1, -1, CMP, CMP, -1, CMP, CMP
};
if (p1 == p2)
return 0;
- c1 = *p1++;
- c2 = *p2++;
+ unsigned char c1 = *p1++;
+ unsigned char c2 = *p2++;
/* Hint: '0' is a digit too. */
- state = S_N | ((c1 == '0') + (isdigit (c1) != 0));
+ int state = S_N + ((c1 == '0') + (isdigit (c1) != 0));
- while ((diff = c1 - c2) == 0 && c1 != '\0')
+ int diff;
+ while ((diff = c1 - c2) == 0)
{
+ if (c1 == '\0')
+ return diff;
+
state = next_state[state];
c1 = *p1++;
c2 = *p2++;
- state |= (c1 == '0') + (isdigit (c1) != 0);
+ state += (c1 == '0') + (isdigit (c1) != 0);
}
- state = result_type[state << 2 | (((c2 == '0') + (isdigit (c2) != 0)))];
+ state = result_type[state * 3 + (((c2 == '0') + (isdigit (c2) != 0)))];
switch (state)
{
--- /dev/null
+/* strlen(str) -- determine the length of the string STR.
+ Copyright (C) 2009 Free Software Foundation, Inc.
+ Contributed by Ulrich Drepper <drepper@redhat.com>.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <sysdep.h>
+
+
+ .text
+ENTRY (memchr)
+ movd %esi, %xmm1
+ movq %rdi, %rcx
+ punpcklbw %xmm1, %xmm1
+ andq $~15, %rdi
+ punpcklbw %xmm1, %xmm1
+ orl $0xffffffff, %esi
+ movdqa (%rdi), %xmm0
+ pshufd $0, %xmm1, %xmm1
+ subq %rdi, %rcx
+ pcmpeqb %xmm1, %xmm0
+ addq %rcx, %rdx
+ shl %cl, %esi
+ pmovmskb %xmm0, %ecx
+ andl %esi, %ecx
+ movl $0, %esi
+ jnz 1f
+ cmpq %rsi, %rdx
+ jle 3f
+
+2: movdqa 16(%rdi,%rsi), %xmm0
+ leaq 16(%rsi), %rsi
+ pcmpeqb %xmm1, %xmm0
+ pmovmskb %xmm0, %ecx
+ testl %ecx, %ecx
+ jnz 1f
+ cmpq %rsi, %rdx
+ jg 2b
+
+3: xorl %eax, %eax
+ ret
+
+1: leaq (%rdi,%rsi), %rax
+ bsfl %ecx, %ecx
+ addq %rcx, %rax
+ addq %rcx, %rsi
+ cmpq %rsi, %rdx
+ jle 3b
+ ret
+END (memchr)
+
+strong_alias (memchr, __memchr)
+libc_hidden_builtin_def (memchr)
projects / thirdparty / glibc.git / commitdiff
