4 * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * * Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * * Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
17 * * Neither the name of Intel Corporation nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 #include <rte_common.h>
37 #include <rte_cpuflags.h>
40 * This should prevent use of advanced instruction sets in this file. Otherwise
41 * the check function itself could cause a crash.
43 #ifdef __INTEL_COMPILER
44 #pragma optimize ("", off)
46 #define GCC_VERSION (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__)
47 #if GCC_VERSION > 404000
48 #pragma GCC optimize ("O0")
53 * Checks if the machine is adequate for running the binary. If it is not, the
54 * program exits with status 1.
55 * The function attribute forces this function to be called before main(). But
56 * with ICC, the check is generated by the compiler.
58 #ifndef __INTEL_COMPILER
59 void __attribute__ ((__constructor__))
63 rte_cpu_check_supported(void)
65 /* This is generated at compile-time by the build system */
66 static const enum rte_cpu_flag_t compile_time_flags[] = {
67 RTE_COMPILE_TIME_CPUFLAGS
69 unsigned count = RTE_DIM(compile_time_flags), i;
72 for (i = 0; i < count; i++) {
73 ret = rte_cpu_get_flag_enabled(compile_time_flags[i]);
77 "ERROR: CPU feature flag lookup failed with error %d\n",
83 "ERROR: This system does not support \"%s\".\n"
84 "Please check that RTE_MACHINE is set correctly.\n",
85 rte_cpu_get_flag_name(compile_time_flags[i]));