mirror of
https://github.com/matrix-construct/construct
synced 2024-12-11 08:02:59 +01:00
44 lines
1,022 B
C
44 lines
1,022 B
C
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// The Construct
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//
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// Copyright (C) The Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2020 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_PROF_ARM_H
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/// ARM platform related
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namespace ircd::prof::arm
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{
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unsigned long long read_virtual_counter() noexcept;
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}
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#if defined(__aarch64__)
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extern inline unsigned long long
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__attribute__((always_inline, gnu_inline, artificial))
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ircd::prof::arm::read_virtual_counter()
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noexcept
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{
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unsigned long long ret;
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asm volatile
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(
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"mrs %0, cntvct_el0"
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: "=r" (ret)
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);
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return ret;
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}
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#else
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extern inline unsigned long long
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__attribute__((always_inline, gnu_inline, artificial))
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ircd::prof::arm::read_virtual_counter()
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noexcept
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{
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return 0;
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}
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#endif
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