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>,
Jeff Law <jeffreyalaw@gmail.com>, Xi Ruoyao <xry111@xry111.site>
Subject: [PATCH v11 19/29] sh: Add string-fzb.h
Date: Wed, 1 Feb 2023 14:03:56 -0300 [thread overview]
Message-ID: <20230201170406.303978-20-adhemerval.zanella@linaro.org> (raw)
In-Reply-To: <20230201170406.303978-1-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:[~2023-02-01 17:05 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-01 17:03 [PATCH v11 00/29] Improve generic string routines Adhemerval Zanella
2023-02-01 17:03 ` [PATCH v11 01/29] Parameterize op_t from memcopy.h Adhemerval Zanella
2023-02-01 17:03 ` [PATCH v11 02/29] Parameterize OP_T_THRES " Adhemerval Zanella
2023-02-01 17:03 ` [PATCH v11 03/29] Add string vectorized find and detection functions Adhemerval Zanella
2023-02-01 17:03 ` [PATCH v11 04/29] string: Improve generic strlen Adhemerval Zanella
2023-02-01 19:51 ` Noah Goldstein
2023-02-01 17:03 ` [PATCH v11 05/29] string: Improve generic strnlen with memchr Adhemerval Zanella
2023-02-01 19:36 ` Noah Goldstein
2023-02-01 19:57 ` Adhemerval Zanella Netto
2023-02-01 19:39 ` Noah Goldstein
2023-02-01 20:02 ` Adhemerval Zanella Netto
2023-02-01 17:03 ` [PATCH v11 06/29] string: Improve generic strchr Adhemerval Zanella
2023-02-01 19:44 ` Noah Goldstein
2023-02-01 20:03 ` Adhemerval Zanella Netto
2023-02-01 17:03 ` [PATCH v11 07/29] string: Improve generic strchrnul Adhemerval Zanella
2023-02-01 19:49 ` Noah Goldstein
2023-02-01 17:03 ` [PATCH v11 08/29] string: Improve generic strcmp Adhemerval Zanella
2023-02-01 17:34 ` Richard Henderson
2023-02-02 11:57 ` Adhemerval Zanella Netto
2023-02-01 17:03 ` [PATCH v11 09/29] string: Improve generic strncmp Adhemerval Zanella
2023-02-01 19:42 ` Noah Goldstein
2023-02-02 12:01 ` Adhemerval Zanella Netto
2023-02-01 17:03 ` [PATCH v11 10/29] string: Improve generic stpcpy Adhemerval Zanella
2023-02-01 17:29 ` Xi Ruoyao
2023-02-02 13:32 ` Adhemerval Zanella Netto
2023-02-01 17:37 ` Richard Henderson
2023-02-01 19:47 ` Noah Goldstein
2023-02-01 20:26 ` Richard Henderson
2023-02-01 17:03 ` [PATCH v11 11/29] string: Improve generic strcpy Adhemerval Zanella
2023-02-01 17:38 ` Richard Henderson
2023-02-01 17:03 ` [PATCH v11 12/29] string: Improve generic memchr Adhemerval Zanella
2023-02-01 19:49 ` Noah Goldstein
2023-02-01 17:03 ` [PATCH v11 13/29] string: Improve generic memrchr Adhemerval Zanella
2023-02-01 19:50 ` Noah Goldstein
2023-02-01 17:03 ` [PATCH v11 14/29] hppa: Add memcopy.h Adhemerval Zanella
2023-02-01 17:03 ` [PATCH v11 15/29] hppa: Add string-fza.h, string-fzc.h, and string-fzi.h Adhemerval Zanella
2023-02-01 17:03 ` [PATCH v11 16/29] alpha: Add string-fza, string-fzb.h, string-fzi.h, and string-shift.h Adhemerval Zanella
2023-02-01 17:03 ` [PATCH v11 17/29] arm: Add string-fza.h Adhemerval Zanella
2023-02-01 17:03 ` [PATCH v11 18/29] powerpc: " Adhemerval Zanella
2023-02-01 17:03 ` Adhemerval Zanella [this message]
2023-02-01 17:03 ` [PATCH v11 20/29] riscv: Add string-fza.h and string-fzi.h Adhemerval Zanella
2023-02-01 17:53 ` Richard Henderson
2023-02-02 12:30 ` Adhemerval Zanella Netto
2023-02-02 16:24 ` Richard Henderson
2023-02-04 16:31 ` Jeff Law
2023-02-05 17:33 ` Richard Henderson
2023-02-01 18:08 ` Noah Goldstein
2023-02-01 17:03 ` [PATCH v11 21/29] string: Hook up the default implementation on test-strlen Adhemerval Zanella
2023-02-01 17:54 ` Richard Henderson
2023-02-01 17:03 ` [PATCH v11 22/29] string: Hook up the default implementation on test-strnlen Adhemerval Zanella
2023-02-01 17:54 ` Richard Henderson
2023-02-01 17:04 ` [PATCH v11 23/29] string: Hook up the default implementation on test-strchr Adhemerval Zanella
2023-02-01 17:55 ` Richard Henderson
2023-02-01 17:04 ` [PATCH v11 24/29] string: Hook up the default implementation on test-strcmp Adhemerval Zanella
2023-02-01 17:55 ` Richard Henderson
2023-02-01 17:04 ` [PATCH v11 25/29] string: Hook up the default implementation on test-strncmp Adhemerval Zanella
2023-02-01 17:56 ` Richard Henderson
2023-02-01 17:04 ` [PATCH v11 26/29] string: Hook up the default implementation on test-stpcpy Adhemerval Zanella
2023-02-01 17:56 ` Richard Henderson
2023-02-01 17:04 ` [PATCH v11 27/29] string: Hook up the default implementation on test-strcpy Adhemerval Zanella
2023-02-01 17:56 ` Richard Henderson
2023-02-01 17:04 ` [PATCH v11 28/29] string: Hook up the default implementation on test-memchr Adhemerval Zanella
2023-02-01 17:57 ` Richard Henderson
2023-02-01 17:04 ` [PATCH v11 29/29] string: Hook up the default implementation on test-memrchr Adhemerval Zanella
2023-02-01 17:57 ` Richard Henderson
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