31 lines
770 B
C
31 lines
770 B
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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#if !(defined(__i386__) || defined(__x86_64__))
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# error "cpuid.h should only be included on x86"
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#endif
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#ifdef HAVE_CPUID_H
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# include <cpuid.h>
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#endif
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#ifndef LAPI_CPUID_H__
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#define LAPI_CPUID_H__
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/*
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* gcc cpuid.h provides __cpuid_count() since v4.4.
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* Clang/LLVM cpuid.h provides __cpuid_count() since v3.4.0.
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*
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* Provide local define for tests needing __cpuid_count() because
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* ltp needs to work in older environments that do not yet
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* have __cpuid_count().
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*/
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#ifndef __cpuid_count
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#define __cpuid_count(level, count, a, b, c, d) ({ \
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__asm__ __volatile__ ("cpuid\n\t" \
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: "=a" (a), "=b" (b), "=c" (c), "=d" (d) \
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: "0" (level), "2" (count)); \
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})
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#endif
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#endif /* LAPI_CPUID_H__ */
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