From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) by sourceware.org (Postfix) with ESMTPS id 44231398B406 for ; Tue, 27 Apr 2021 15:34:15 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 44231398B406 Received: from pps.filterd (m0098399.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.43/8.16.0.43) with SMTP id 13RFXF1b030958; Tue, 27 Apr 2021 11:34:14 -0400 Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com with ESMTP id 386hjcgywy-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 27 Apr 2021 11:34:14 -0400 Received: from m0098399.ppops.net (m0098399.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.43/8.16.0.43) with SMTP id 13RFXnUX033798; Tue, 27 Apr 2021 11:34:13 -0400 Received: from ppma03wdc.us.ibm.com (ba.79.3fa9.ip4.static.sl-reverse.com [169.63.121.186]) by mx0a-001b2d01.pphosted.com with ESMTP id 386hjcgywc-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 27 Apr 2021 11:34:13 -0400 Received: from pps.filterd (ppma03wdc.us.ibm.com [127.0.0.1]) by ppma03wdc.us.ibm.com (8.16.0.43/8.16.0.43) with SMTP id 13RFH4A3015554; Tue, 27 Apr 2021 15:34:12 GMT Received: from b01cxnp22033.gho.pok.ibm.com (b01cxnp22033.gho.pok.ibm.com [9.57.198.23]) by ppma03wdc.us.ibm.com with ESMTP id 384ay8xddc-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 27 Apr 2021 15:34:12 +0000 Received: from b01ledav004.gho.pok.ibm.com (b01ledav004.gho.pok.ibm.com [9.57.199.109]) by b01cxnp22033.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 13RFYB7e26607994 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 27 Apr 2021 15:34:11 GMT Received: from b01ledav004.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 71E3F112064; Tue, 27 Apr 2021 15:34:11 +0000 (GMT) Received: from b01ledav004.gho.pok.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4F3CD112061; Tue, 27 Apr 2021 15:34:11 +0000 (GMT) Received: from ltcden2-lp1.aus.stglabs.ibm.com (unknown [9.53.174.68]) by b01ledav004.gho.pok.ibm.com (Postfix) with ESMTPS; Tue, 27 Apr 2021 15:34:11 +0000 (GMT) Received: by ltcden2-lp1.aus.stglabs.ibm.com (Postfix, from userid 1006) id CDD0B41397AD; Tue, 27 Apr 2021 10:34:10 -0500 (CDT) From: Bill Schmidt To: gcc-patches@gcc.gnu.org Cc: segher@kernel.crashing.org, dje.gcc@gmail.com, jakub@redhat.com, jlaw@tachyum.com, Bill Schmidt Subject: [PATCH 06/57] rs6000: Add helper functions for parsing Date: Tue, 27 Apr 2021 10:32:41 -0500 Message-Id: <339c02294ee06570958bc71c772f33736a103fa9.1619537141.git.wschmidt@linux.ibm.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: 3l8hNzqHdLi-99okLdBS-Li4CXba9Tvm X-Proofpoint-GUID: Jhd9QHJtSeex325jJVQyArC405_bspTQ X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391, 18.0.761 definitions=2021-04-27_08:2021-04-27, 2021-04-27 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 lowpriorityscore=0 mlxlogscore=999 phishscore=0 bulkscore=0 adultscore=0 suspectscore=0 malwarescore=0 priorityscore=1501 spamscore=0 clxscore=1015 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2104060000 definitions=main-2104270108 X-Spam-Status: No, score=-12.5 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_EF, GIT_PATCH_0, RCVD_IN_DNSWL_LOW, RCVD_IN_MSPIKE_H2, SPF_HELO_NONE, SPF_NONE, TXREP autolearn=ham autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 27 Apr 2021 15:34:16 -0000 2021-03-03 Bill Schmidt gcc/ * config/rs6000/rs6000-gen-builtins.c (MININT): New defined constant. (exit_codes): New enum. (consume_whitespace): New function. (advance_line): Likewise. (safe_inc_pos): Likewise. (match_identifier): Likewise. (match_integer): Likewise. (match_to_right_bracket): Likewise. --- gcc/config/rs6000/rs6000-gen-builtins.c | 121 ++++++++++++++++++++++++ 1 file changed, 121 insertions(+) diff --git a/gcc/config/rs6000/rs6000-gen-builtins.c b/gcc/config/rs6000/rs6000-gen-builtins.c index 0e8b315208b..f3e1d31c225 100644 --- a/gcc/config/rs6000/rs6000-gen-builtins.c +++ b/gcc/config/rs6000/rs6000-gen-builtins.c @@ -164,6 +164,10 @@ along with GCC; see the file COPYING3. If not see #include #include +/* Used as a sentinel for range constraints on integer fields. No field can + be 32 bits wide, so this is a safe sentinel value. */ +#define MININT INT32_MIN + /* Input and output file descriptors and pathnames. */ static FILE *bif_file; static FILE *ovld_file; @@ -186,6 +190,11 @@ static char linebuf[LINELEN]; static int line; static int pos; +/* Exit codes for the shell. */ +enum exit_codes { + EC_INTERR +}; + /* Pointer to a diagnostic function. */ void (*diag) (const char *, ...) __attribute__ ((format (printf, 1, 2))) = NULL; @@ -210,3 +219,115 @@ ovld_diag (const char * fmt, ...) vfprintf (stderr, fmt, args); va_end (args); } + +/* Pass over unprintable characters and whitespace (other than a newline, + which terminates the scan). */ +static void +consume_whitespace () +{ + while (pos < LINELEN && isspace(linebuf[pos]) && linebuf[pos] != '\n') + pos++; + return; +} + +/* Get the next nonblank, noncomment line, returning 0 on EOF, 1 otherwise. */ +static int +advance_line (FILE *file) +{ + while (1) + { + /* Read ahead one line and check for EOF. */ + if (!fgets (linebuf, sizeof(linebuf), file)) + return 0; + line++; + pos = 0; + consume_whitespace (); + if (linebuf[pos] != '\n' && linebuf[pos] != ';') + return 1; + } +} + +static inline void +safe_inc_pos () +{ + if (pos++ >= LINELEN) + { + (*diag) ("line length overrun.\n"); + exit (EC_INTERR); + } +} + +/* Match an identifier, returning NULL on failure, else a pointer to a + buffer containing the identifier. */ +static char * +match_identifier () +{ + int lastpos = pos - 1; + while (isalnum (linebuf[lastpos + 1]) || linebuf[lastpos + 1] == '_') + if (++lastpos >= LINELEN - 1) + { + (*diag) ("line length overrun.\n"); + exit (EC_INTERR); + } + + if (lastpos < pos) + return 0; + + char *buf = (char *) malloc (lastpos - pos + 2); + memcpy (buf, &linebuf[pos], lastpos - pos + 1); + buf[lastpos - pos + 1] = '\0'; + + pos = lastpos + 1; + return buf; +} + +/* Match an integer and return its value, or MININT on failure. */ +static int +match_integer () +{ + int startpos = pos; + if (linebuf[pos] == '-') + safe_inc_pos (); + + int lastpos = pos - 1; + while (isdigit (linebuf[lastpos + 1])) + if (++lastpos >= LINELEN - 1) + { + (*diag) ("line length overrun in match_integer.\n"); + exit (EC_INTERR); + } + + if (lastpos < pos) + return MININT; + + pos = lastpos + 1; + char *buf = (char *) malloc (lastpos - startpos + 2); + memcpy (buf, &linebuf[startpos], lastpos - startpos + 1); + buf[lastpos - startpos + 1] = '\0'; + + int x; + sscanf (buf, "%d", &x); + return x; +} + +static const char * +match_to_right_bracket () +{ + int lastpos = pos - 1; + while (linebuf[lastpos + 1] != ']') + if (++lastpos >= LINELEN - 1) + { + (*diag) ("line length overrun.\n"); + exit (EC_INTERR); + } + + if (lastpos < pos) + return 0; + + char *buf = (char *) malloc (lastpos - pos + 2); + memcpy (buf, &linebuf[pos], lastpos - pos + 1); + buf[lastpos - pos + 1] = '\0'; + + pos = lastpos + 1; + return buf; +} -- 2.27.0