Projects
home:lf14:branches:Mega:23.09
gcc
_service:tar_scm:0025-AArch64-Rewrite-the-tsv11...
Sign Up
Log In
Username
Password
Overview
Repositories
Revisions
Requests
Users
Attributes
Meta
File _service:tar_scm:0025-AArch64-Rewrite-the-tsv110-option.patch of Package gcc
From 2f0d0b1298fb9c3266bb102796b027a5570ad833 Mon Sep 17 00:00:00 2001 From: dingguangya <dingguangya1@huawei.com> Date: Mon, 4 Sep 2023 16:27:38 +0800 Subject: [PATCH 1/2] [AArch64] Rewrite the tsv110 option Reset the more appropriate options for tsv110. --- gcc/common/config/aarch64/aarch64-common.cc | 76 +++++++++++++++++++++ 1 file changed, 76 insertions(+) diff --git a/gcc/common/config/aarch64/aarch64-common.cc b/gcc/common/config/aarch64/aarch64-common.cc index dfda5b837..85ce8133b 100644 --- a/gcc/common/config/aarch64/aarch64-common.cc +++ b/gcc/common/config/aarch64/aarch64-common.cc @@ -44,6 +44,8 @@ #undef TARGET_OPTION_INIT_STRUCT #define TARGET_OPTION_INIT_STRUCT aarch64_option_init_struct +#define INVALID_IMP ((unsigned) -1) + /* Set default optimization options. */ static const struct default_options aarch_option_optimization_table[] = { @@ -65,6 +67,77 @@ static const struct default_options aarch_option_optimization_table[] = { OPT_LEVELS_NONE, 0, NULL, 0 } }; +/* CPU vendor id. */ +static unsigned vendor_id = INVALID_IMP; + +/* The part number of the CPU. */ +static unsigned part_id = INVALID_IMP; + +/* Return the hex integer that is after ':' for the FIELD. + Return -1 if there was problem parsing the integer. */ +static unsigned +parse_cpuinfo (char *field) +{ + if (field == NULL) + return INVALID_IMP; + const char *rest = strchr (field, ':'); + + if (rest == NULL) + return INVALID_IMP; + + char *after; + unsigned fint = strtol (rest + 1, &after, 16); + if (after == rest + 1) + return INVALID_IMP; + return fint; +} + +/* Read CPU vendor_id and part_id. */ + +static void +read_cpuinfo () +{ + FILE *fp = fopen ("/proc/cpuinfo", "r"); + if (fp == NULL) + return; + + /* Read 1024-byte data from /proc/cpuinfo. */ + char cpuinfo[1024]; + fread(cpuinfo, sizeof(char), sizeof(cpuinfo) - 1, fp); + + char *vendor = strstr(cpuinfo, "CPU implementer"); + vendor_id = parse_cpuinfo(vendor); + + char *part = strstr(cpuinfo, "CPU part"); + part_id = parse_cpuinfo(part); + + fclose(fp); +} + +/* Reset the tsv110 option. After checking the platform information, + this function can reset the more appropriate options. + TODO: Currently, this function is not applicable to the cross + compilation scenario. */ + +static void +reset_tsv110_option () +{ + /* Read CPU Information. */ + if (vendor_id == INVALID_IMP) + read_cpuinfo (); + + if (vendor_id == 0x48 && part_id == 0xd01) + { + /* Outline-atomics is enabled by default and + aarch64_flag_outline_atomics defaults to 2. Therefore, the current + modification affects only the default scenario. When the option + moutline-atomics is added, the value of aarch64_flag_outline_atomics is 1, + that is, aarch64_flag_outline_atomics is not reset to 0. */ + if (aarch64_flag_outline_atomics == 2) + aarch64_flag_outline_atomics = 0; + } +} + /* Implement TARGET_HANDLE_OPTION. This function handles the target specific options for CPU/target selection. @@ -83,6 +156,9 @@ aarch64_handle_option (struct gcc_options *opts, const char *arg = decoded->arg; int val = decoded->value; + /* Reset the tsv110 options. */ + reset_tsv110_option (); + switch (code) { case OPT_march_: -- 2.33.0
Locations
Projects
Search
Status Monitor
Help
Open Build Service
OBS Manuals
API Documentation
OBS Portal
Reporting a Bug
Contact
Mailing List
Forums
Chat (IRC)
Twitter
Open Build Service (OBS)
is an
openSUSE project
.
浙ICP备2022010568号-2