mirror of
https://github.com/matrix-construct/construct
synced 2024-08-27 20:05:17 +02:00
92 lines
1.9 KiB
C++
92 lines
1.9 KiB
C++
// Matrix Construct
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//
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// Copyright (C) Matrix Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2019 Jason Volk <jason@zemos.net>
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice is present in all copies. The
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// full license for this software is available in the LICENSE file.
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#pragma once
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#define HAVE_IRCD_PERF_H
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namespace ircd::perf
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{
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struct init;
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IRCD_EXCEPTION(ircd::error, error)
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unsigned long long rdpmc(const uint &);
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unsigned long long rdtscp();
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unsigned long long rdtsc();
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uint64_t cycles();
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}
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namespace ircd
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{
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using perf::cycles;
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}
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struct ircd::perf::init
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{
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init();
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~init() noexcept;
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};
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inline uint64_t
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__attribute__((flatten, always_inline, gnu_inline, artificial))
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ircd::perf::cycles()
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{
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return perf::rdtsc();
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}
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#if defined(__x86_64__) || defined(__i386__)
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inline unsigned long long
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__attribute__((always_inline, gnu_inline, artificial))
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ircd::perf::rdtsc()
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{
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return __builtin_ia32_rdtsc();
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}
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#else
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inline unsigned long long
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ircd::perf::rdtsc()
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{
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static_assert(false, "TODO: Implement fallback here");
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return 0;
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}
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#endif
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#if defined(__x86_64__) || defined(__i386__)
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inline unsigned long long
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__attribute__((always_inline, gnu_inline, artificial))
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ircd::perf::rdtscp()
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{
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uint32_t ia32_tsc_aux;
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return __builtin_ia32_rdtscp(&ia32_tsc_aux);
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}
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#else
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inline unsigned long long
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ircd::perf::rdtscp()
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{
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static_assert(false, "TODO: Implement fallback here");
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return 0;
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}
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#endif
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#if defined(__x86_64__) || defined(__i386__)
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inline unsigned long long
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__attribute__((always_inline, gnu_inline, artificial))
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ircd::perf::rdpmc(const uint &c)
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{
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return __builtin_ia32_rdpmc(c);
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}
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#else
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inline unsigned long long
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ircd::perf::rdpmc(const uint &c)
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{
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static_assert(false, "TODO: Implement fallback here");
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return 0;
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}
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#endif
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