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Diffstat (limited to 'arch/tile/lib/strchr_32.c')
-rw-r--r--arch/tile/lib/strchr_32.c64
1 files changed, 0 insertions, 64 deletions
diff --git a/arch/tile/lib/strchr_32.c b/arch/tile/lib/strchr_32.c
deleted file mode 100644
index 841fe6963019..000000000000
--- a/arch/tile/lib/strchr_32.c
+++ /dev/null
@@ -1,64 +0,0 @@
-/*
- * Copyright 2010 Tilera Corporation. All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation, version 2.
- *
- * This program 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, GOOD TITLE or
- * NON INFRINGEMENT. See the GNU General Public License for
- * more details.
- */
-
-#include <linux/types.h>
-#include <linux/string.h>
-#include <linux/module.h>
-
-char *strchr(const char *s, int c)
-{
- int z, g;
-
- /* Get an aligned pointer. */
- const uintptr_t s_int = (uintptr_t) s;
- const uint32_t *p = (const uint32_t *)(s_int & -4);
-
- /* Create four copies of the byte for which we are looking. */
- const uint32_t goal = 0x01010101 * (uint8_t) c;
-
- /* Read the first aligned word, but force bytes before the string to
- * match neither zero nor goal (we make sure the high bit of each
- * byte is 1, and the low 7 bits are all the opposite of the goal
- * byte).
- *
- * Note that this shift count expression works because we know shift
- * counts are taken mod 32.
- */
- const uint32_t before_mask = (1 << (s_int << 3)) - 1;
- uint32_t v = (*p | before_mask) ^ (goal & __insn_shrib(before_mask, 1));
-
- uint32_t zero_matches, goal_matches;
- while (1) {
- /* Look for a terminating '\0'. */
- zero_matches = __insn_seqb(v, 0);
-
- /* Look for the goal byte. */
- goal_matches = __insn_seqb(v, goal);
-
- if (__builtin_expect(zero_matches | goal_matches, 0))
- break;
-
- v = *++p;
- }
-
- z = __insn_ctz(zero_matches);
- g = __insn_ctz(goal_matches);
-
- /* If we found c before '\0' we got a match. Note that if c == '\0'
- * then g == z, and we correctly return the address of the '\0'
- * rather than NULL.
- */
- return (g <= z) ? ((char *)p) + (g >> 3) : NULL;
-}
-EXPORT_SYMBOL(strchr);