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53 lines
1.4 KiB
53 lines
1.4 KiB
/* |
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* Copyright (c) 2005 Luca Barbato <lu_zero@gentoo.org> |
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* |
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* This file is part of Libav. |
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* |
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* Libav is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* Libav is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with Libav; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#ifndef AVUTIL_PPC_TIMER_H |
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#define AVUTIL_PPC_TIMER_H |
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#include <stdint.h> |
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#include "config.h" |
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#if HAVE_INLINE_ASM_LABELS |
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#define AV_READ_TIME read_time |
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static inline uint64_t read_time(void) |
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{ |
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uint32_t tbu, tbl, temp; |
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/* from section 2.2.1 of the 32-bit PowerPC PEM */ |
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__asm__ volatile( |
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"1:\n" |
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"mftbu %2\n" |
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"mftb %0\n" |
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"mftbu %1\n" |
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"cmpw %2,%1\n" |
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"bne 1b\n" |
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: "=r"(tbl), "=r"(tbu), "=r"(temp) |
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: |
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: "cc"); |
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return (((uint64_t)tbu)<<32) | (uint64_t)tbl; |
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} |
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#endif /* HAVE_INLINE_ASM_LABELS */ |
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#endif /* AVUTIL_PPC_TIMER_H */
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