From: Adhemerval Zanella <adhemerval.zanella@linaro.org>
To: libc-alpha@sourceware.org,
Richard Henderson <richard.henderson@linaro.org>,
Noah Goldstein <goldstein.w.n@gmail.com>
Subject: [PATCH v10 17/24] sh: Add string-fzb.h
Date: Fri, 20 Jan 2023 18:16:15 -0300 [thread overview]
Message-ID: <20230120211622.3445279-18-adhemerval.zanella@linaro.org> (raw)
In-Reply-To: <20230120211622.3445279-1-adhemerval.zanella@linaro.org>
Use the SH cmp/str on has_{zero,eq,zero_eq}.
Checked on sh4-linux-gnu.
---
sysdeps/sh/string-fzb.h | 55 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 55 insertions(+)
create mode 100644 sysdeps/sh/string-fzb.h
diff --git a/sysdeps/sh/string-fzb.h b/sysdeps/sh/string-fzb.h
new file mode 100644
index 0000000000..c8dd176362
--- /dev/null
+++ b/sysdeps/sh/string-fzb.h
@@ -0,0 +1,55 @@
+/* Zero byte detection; boolean. SH4 version.
+ Copyright (C) 2023 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 */
--
2.34.1
next prev parent reply other threads:[~2023-01-20 21:17 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-20 21:15 [PATCH v10 00/24] Improve generic string routines Adhemerval Zanella
2023-01-20 21:15 ` [PATCH v10 01/24] Parameterize op_t from memcopy.h Adhemerval Zanella
2023-01-20 21:16 ` [PATCH v10 02/24] Parameterize OP_T_THRES " Adhemerval Zanella
2023-01-20 21:16 ` [PATCH v10 03/24] Add string vectorized find and detection functions Adhemerval Zanella
2023-01-20 21:16 ` [PATCH v10 04/24] string: Improve generic strlen Adhemerval Zanella
2023-01-20 21:16 ` [PATCH v10 05/24] string: Improve generic strnlen Adhemerval Zanella
2023-01-20 21:16 ` [PATCH v10 06/24] string: Improve generic strchr Adhemerval Zanella
2023-01-20 21:16 ` [PATCH v10 07/24] string: Improve generic strchrnul Adhemerval Zanella
2023-01-20 21:16 ` [PATCH v10 08/24] string: Improve generic strcmp Adhemerval Zanella
2023-01-20 21:16 ` [PATCH v10 09/24] string: Improve generic strncmp Adhemerval Zanella
2023-01-20 21:16 ` [PATCH v10 10/24] string: Improve generic memchr Adhemerval Zanella
2023-01-20 21:16 ` [PATCH v10 11/24] string: Improve generic memrchr Adhemerval Zanella
2023-01-20 21:16 ` [PATCH v10 12/24] hppa: Add memcopy.h Adhemerval Zanella
2023-01-20 21:16 ` [PATCH v10 13/24] hppa: Add string-fzb.h and string-fzi.h Adhemerval Zanella
2023-01-20 21:16 ` [PATCH v10 14/24] alpha: " Adhemerval Zanella
2023-01-20 21:16 ` [PATCH v10 15/24] arm: Add string-fza.h Adhemerval Zanella
2023-01-20 21:16 ` [PATCH v10 16/24] powerpc: " Adhemerval Zanella
2023-01-20 21:16 ` Adhemerval Zanella [this message]
2023-01-20 21:16 ` [PATCH v10 18/24] string: Hook up the default implementation on test-strlen Adhemerval Zanella
2023-01-20 21:16 ` [PATCH v10 19/24] string: Hook up the default implementation on test-strnlen Adhemerval Zanella
2023-01-20 21:16 ` [PATCH v10 20/24] string: Hook up the default implementation on test-strchr Adhemerval Zanella
2023-01-20 21:16 ` [PATCH v10 21/24] string: Hook up the default implementation on test-strcmp Adhemerval Zanella
2023-01-20 21:16 ` [PATCH v10 22/24] string: Hook up the default implementation on test-strncmp Adhemerval Zanella
2023-01-20 21:16 ` [PATCH v10 23/24] string: Hook up the default implementation on test-memchr Adhemerval Zanella
2023-01-20 21:16 ` [PATCH v10 24/24] string: Hook up the default implementation on test-memrchr Adhemerval Zanella
2023-01-20 23:00 ` [PATCH v10 00/24] Improve generic string routines Jeff Law
2023-01-27 16:52 ` Adhemerval Zanella Netto
2023-01-27 19:36 ` Richard Henderson
2023-01-30 13:26 ` Adhemerval Zanella Netto
2023-01-30 18:37 ` Jeff Law
2023-01-28 14:30 ` Xi Ruoyao
2023-01-30 13:10 ` Adhemerval Zanella Netto
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