mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-22 13:00:06 +00:00
56 lines
1.6 KiB
C
56 lines
1.6 KiB
C
/* Zero byte detection; boolean. SH4 version.
|
|
Copyright (C) 2023-2024 Free Software Foundation, Inc.
|
|
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, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef STRING_FZB_H
|
|
#define STRING_FZB_H 1
|
|
|
|
#include <sys/cdefs.h>
|
|
#include <string-optype.h>
|
|
|
|
/* Determine if any bytes within X1 and X2 are equal. */
|
|
static __always_inline _Bool
|
|
has_eq (op_t x1, op_t x2)
|
|
{
|
|
int ret;
|
|
|
|
/* TODO: A compiler builtin for cmp/str would be much better. It is
|
|
difficult to use asm goto here, because the range of bt/bf are
|
|
quite small. */
|
|
asm("cmp/str %1,%2\n\t"
|
|
"movt %0"
|
|
: "=r" (ret) : "r" (x1), "r" (x2) : "t");
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Determine if any byte within X is zero. */
|
|
static __always_inline _Bool
|
|
has_zero (op_t x)
|
|
{
|
|
return has_eq (x, 0);
|
|
}
|
|
|
|
/* Likewise, but for zeros in X1 and equal bytes between X1 and X2. */
|
|
static __always_inline _Bool
|
|
has_zero_eq (op_t x1, op_t x2)
|
|
{
|
|
return has_zero (x1) | has_eq (x1, x2);
|
|
}
|
|
|
|
#endif /* STRING_FZB_H */
|