From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 1791) id C43EF38493D3; Fri, 13 Jan 2023 20:03:55 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org C43EF38493D3 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1673640235; bh=2GNGe3qqpABxWVH+1HGHhpbuM6vih/eCX+5jJ2N4RF4=; h=From:To:Subject:Date:From; b=dwM89z3NZGQsJjB1ql8z09d6gOTRip3g+u+jnOBrbH0yr6b9eHE1YqityhbAImPtn cY7WPcNyi3M3BedbRWLuQD/vr8DtcRYyq0RsymLTfwEqeJa8sHEDpN7bL5ZkTrOF6K 5FivYA3oTFSJN1nfjaVv8oRHTCVyFt6dhEH4L6Zg= Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit From: Adhemerval Zanella To: glibc-cvs@sourceware.org Subject: [glibc/azanella/generic-strings] sh: Add string-fzb.h X-Act-Checkin: glibc X-Git-Author: Adhemerval Zanella Netto X-Git-Refname: refs/heads/azanella/generic-strings X-Git-Oldrev: a86c47f74ee2bbb1f2943ba1086a183aa29e59b0 X-Git-Newrev: 75037100671faaacca3cf89106a06c4df7988ff4 Message-Id: <20230113200355.C43EF38493D3@sourceware.org> Date: Fri, 13 Jan 2023 20:03:55 +0000 (GMT) List-Id: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=75037100671faaacca3cf89106a06c4df7988ff4 commit 75037100671faaacca3cf89106a06c4df7988ff4 Author: Adhemerval Zanella Netto Date: Tue Jan 10 18:01:06 2023 -0300 sh: Add string-fzb.h Use the SH cmp/str on has_{zero,eq,zero_eq}. Checked on sh4-linux-gnu. Diff: --- sysdeps/sh/string-fzb.h | 55 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) 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 + . */ + +#ifndef STRING_FZB_H +#define STRING_FZB_H 1 + +#include +#include + +/* 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 */