2 * Copyright (c) 2016 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 #ifndef included_clib_cpu_h
17 #define included_clib_cpu_h
19 #include <vppinfra/format.h>
22 * multiarchitecture support. Adding new entry will produce
23 * new graph node function variant optimized for specific cpu
25 * Order is important for runtime selection, as 1st match wins...
28 #if __x86_64__ && CLIB_DEBUG == 0
29 #define foreach_march_variant(macro, x) \
30 macro(avx2, x, "arch=core-avx2")
32 #define foreach_march_variant(macro, x)
36 #if __GNUC__ > 4 && !__clang__
37 #define CLIB_CPU_OPTIMIZED __attribute__ ((optimize ("tree-vectorize")))
39 #define CLIB_CPU_OPTIMIZED
43 #define CLIB_MULTIARCH_ARCH_CHECK(arch, fn, tgt) \
44 if (clib_cpu_supports_ ## arch()) \
45 return & fn ## _ ##arch;
47 #define CLIB_MULTIARCH_SELECT_FN(fn,...) \
48 __VA_ARGS__ void * fn ## _multiarch_select(void) \
50 foreach_march_variant(CLIB_MULTIARCH_ARCH_CHECK, fn) \
57 #define foreach_x86_64_flags \
59 _ (ssse3, 1, ecx, 9) \
60 _ (sse41, 1, ecx, 19) \
61 _ (sse42, 1, ecx, 20) \
64 _ (avx512f, 7, ebx, 16) \
69 clib_get_cpuid(const u32 lev, u32 * eax, u32 *ebx, u32 * ecx, u32 * edx)
71 if ((u32) __get_cpuid_max (0x80000000 & lev, 0) < lev)
74 __cpuid_count(lev, 0, *eax, *ebx, *ecx, *edx);
76 __cpuid(lev, *eax, *ebx, *ecx, *edx);
81 #define _(flag, func, reg, bit) \
83 clib_cpu_supports_ ## flag() \
85 u32 __attribute__((unused)) eax, ebx = 0, ecx = 0, edx = 0; \
86 clib_get_cpuid (func, &eax, &ebx, &ecx, &edx); \
88 return ((reg & (1 << bit)) != 0); \
94 format_function_t format_cpu_uarch;
95 format_function_t format_cpu_model_name;
96 format_function_t format_cpu_flags;