8579151e4b
fpsetround(), fpsetsticky(), obtained from NetBSD and tweaked a little to use definitions from machine/fsr.h instead of magic numbers.
31 lines
517 B
C
31 lines
517 B
C
/* $NetBSD: fpsetround.c,v 1.2 2002/01/13 21:45:51 thorpej Exp $ */
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/*
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* Written by J.T. Conklin, Apr 10, 1995
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* Public domain.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <machine/fsr.h>
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#include <ieeefp.h>
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fp_rnd_t
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fpsetround(rnd_dir)
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fp_rnd_t rnd_dir;
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{
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unsigned int old;
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unsigned int new;
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__asm__("st %%fsr,%0" : "=m" (old));
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new = old;
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new &= ~FSR_RD_MASK;
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new |= FSR_RD((unsigned int)rnd_dir & 0x03);
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__asm__("ld %0,%%fsr" : : "m" (new));
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return ((fp_rnd_t)FSR_GET_RD(old));
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}
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