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39 lines
924 B
39 lines
924 B
/*
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* include/fpu.h
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*
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* This work was supported by the Director, Office of Science, Division
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* of Mathematical, Information, and Computational Sciences of the
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* U.S. Department of Energy under contract number DE-AC03-76SF00098.
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*
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* Copyright (c) 2001
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*
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* Contains functions to set and restore the round-to-double flag in the
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* control word of a x86 FPU. The algorithms in the double-double and
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* quad-double package does not function with the extended mode found in
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* these FPU.
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*/
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#ifndef _QD_FPU_H
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#define _QD_FPU_H
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#include <qd/qd_config.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* Set the round-to-double flag, and save the old control word in old_cw.
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* If old_cw is NULL, the old control word is not saved.
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*/
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QD_API void fpu_fix_start(unsigned int *old_cw);
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/*
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* Restore the control word.
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*/
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QD_API void fpu_fix_end(unsigned int *old_cw);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _QD_FPU_H */
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