53 строки
1.4 KiB
C
53 строки
1.4 KiB
C
/*
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* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
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* University Research and Technology
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* Corporation. All rights reserved.
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* Copyright (c) 2004-2005 The University of Tennessee and The University
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* of Tennessee Research Foundation. All rights
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* reserved.
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* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
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* University of Stuttgart. All rights reserved.
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* Copyright (c) 2004-2005 The Regents of the University of California.
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* All rights reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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#ifndef OMPI_SYS_ARCH_TIMER_H
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#define OMPI_SYS_ARCH_TIMER_H 1
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typedef uint64_t opal_timer_t;
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#if OMPI_GCC_INLINE_ASSEMBLY
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static inline opal_timer_t
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opal_sys_timer_get_cycles(void)
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{
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unsigned int tbl, tbu0, tbu1;
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do {
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__asm__ __volatile__ ("mftbu %0" : "=r"(tbu0));
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__asm__ __volatile__ ("mftb %0" : "=r"(tbl));
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__asm__ __volatile__ ("mftbu %0" : "=r"(tbu1));
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} while (tbu0 != tbu1);
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return (((unsigned long long)tbu0) << 32) | tbl;
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}
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#define OPAL_HAVE_SYS_TIMER_GET_CYCLES 1
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#else
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opal_timer_t opal_sys_timer_get_cycles(void);
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#define OPAL_HAVE_SYS_TIMER_GET_CYCLES 1
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#endif /* OMPI_GCC_INLINE_ASSEMBLY */
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#endif /* ! OMPI_SYS_ARCH_TIMER_H */
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