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/* $OpenBSD: round.c,v 1.3 2003/07/31 21:48:03 deraadt Exp $ */
/* $NetBSD: round.c,v 1.1 1995/04/26 00:27:28 jtc Exp $ */
/*
* Written by J.T. Conklin, Apr 18, 1995
* Public domain.
*/
#include <assert.h>
#include <stdlib.h>
#include <ieeefp.h>
#include <float.h>
int
main(int argc, char *argv[])
{
/*
* This test would be better if it actually performed some
* calculations to verify the selected rounding mode. But
* this is probably acceptable since the fp{get,set}round
* functions usually just get or set the processors fpu
* control word.
*/
assert(fpgetround() == FP_RN);
assert(FLT_ROUNDS == 1);
assert(fpsetround(FP_RP) == FP_RN);
assert(fpgetround() == FP_RP);
assert(FLT_ROUNDS == 2);
assert(fpsetround(FP_RM) == FP_RP);
assert(fpgetround() == FP_RM);
assert(FLT_ROUNDS == 3);
assert(fpsetround(FP_RZ) == FP_RM);
assert(fpgetround() == FP_RZ);
assert(FLT_ROUNDS == 0);
assert(fpsetround(FP_RN) == FP_RZ);
assert(fpgetround() == FP_RN);
assert(FLT_ROUNDS == 1);
exit(0);
}
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