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-rw-r--r--src/vppinfra/cpu.h112
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diff --git a/src/vppinfra/cpu.h b/src/vppinfra/cpu.h
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+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef included_clib_cpu_h
+#define included_clib_cpu_h
+
+#include <vppinfra/format.h>
+
+/*
+ * multiarchitecture support. Adding new entry will produce
+ * new graph node function variant optimized for specific cpu
+ * microarchitecture.
+ * Order is important for runtime selection, as 1st match wins...
+ */
+
+#if __x86_64__ && CLIB_DEBUG == 0
+#define foreach_march_variant(macro, x) \
+ macro(avx2, x, "arch=core-avx2")
+#else
+#define foreach_march_variant(macro, x)
+#endif
+
+
+#if __GNUC__ > 4 && !__clang__
+#define CLIB_CPU_OPTIMIZED __attribute__ ((optimize ("tree-vectorize")))
+#else
+#define CLIB_CPU_OPTIMIZED
+#endif
+
+
+#define CLIB_MULTIARCH_ARCH_CHECK(arch, fn, tgt) \
+ if (clib_cpu_supports_ ## arch()) \
+ return & fn ## _ ##arch;
+
+#define CLIB_MULTIARCH_SELECT_FN(fn,...) \
+ __VA_ARGS__ void * fn ## _multiarch_select(void) \
+{ \
+ foreach_march_variant(CLIB_MULTIARCH_ARCH_CHECK, fn) \
+ return & fn; \
+}
+
+
+#define foreach_x86_64_flags \
+_ (sse3, 1, ecx, 0) \
+_ (ssse3, 1, ecx, 9) \
+_ (sse41, 1, ecx, 19) \
+_ (sse42, 1, ecx, 20) \
+_ (avx, 1, ecx, 28) \
+_ (avx2, 7, ebx, 5) \
+_ (avx512f, 7, ebx, 16) \
+_ (aes, 1, ecx, 25) \
+_ (sha, 7, ebx, 29) \
+_ (invariant_tsc, 0x80000007, edx, 8)
+
+#if defined(__x86_64__)
+#include "cpuid.h"
+
+static inline int
+clib_get_cpuid (const u32 lev, u32 * eax, u32 * ebx, u32 * ecx, u32 * edx)
+{
+ if ((u32) __get_cpuid_max (0x80000000 & lev, 0) < lev)
+ return 0;
+ if (lev == 7)
+ __cpuid_count (lev, 0, *eax, *ebx, *ecx, *edx);
+ else
+ __cpuid (lev, *eax, *ebx, *ecx, *edx);
+ return 1;
+}
+
+
+#define _(flag, func, reg, bit) \
+static inline int \
+clib_cpu_supports_ ## flag() \
+{ \
+ u32 __attribute__((unused)) eax, ebx = 0, ecx = 0, edx = 0; \
+ clib_get_cpuid (func, &eax, &ebx, &ecx, &edx); \
+ \
+ return ((reg & (1 << bit)) != 0); \
+}
+foreach_x86_64_flags
+#undef _
+#else
+
+#define _(flag, func, reg, bit) \
+static inline int clib_cpu_supports_ ## flag() { return 0; }
+foreach_x86_64_flags
+#undef _
+#endif
+#endif
+ format_function_t format_cpu_uarch;
+format_function_t format_cpu_model_name;
+format_function_t format_cpu_flags;
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */