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freebsd/sys/sparc64/include/ieeefp.h
David Schultz a50079b7ff People porting FreeBSD to new architectures ought not have to
implement a deprecated FPU control interface in addition to the
standard one.  To make this clearer, further deprecate ieeefp.h
by not declaring the function prototypes except on architectures
that implement them already.

Currently i386 and amd64 implement the ieeefp.h interface for
compatibility, and for fp[gs]etprec(), which doesn't exist on
most other hardware.  Powerpc, sparc64, and ia64 partially implement
it and probably shouldn't, and other architectures don't implement it
at all.
2011-10-21 06:41:46 +00:00

38 lines
1012 B
C

/*-
* Written by J.T. Conklin, Apr 6, 1995
* Public domain.
* $FreeBSD$
*/
#ifndef _MACHINE_IEEEFP_H_
#define _MACHINE_IEEEFP_H_
/* Deprecated FPU control interface */
#include <machine/fsr.h>
typedef int fp_except_t;
#define FP_X_IMP FSR_NX /* imprecise (loss of precision) */
#define FP_X_DZ FSR_DZ /* divide-by-zero exception */
#define FP_X_UFL FSR_UF /* underflow exception */
#define FP_X_OFL FSR_OF /* overflow exception */
#define FP_X_INV FSR_NV /* invalid operation exception */
typedef enum {
FP_RN = FSR_RD_N, /* round to nearest representable number */
FP_RZ = FSR_RD_Z, /* round to zero (truncate) */
FP_RP = FSR_RD_PINF, /* round toward positive infinity */
FP_RM = FSR_RD_NINF /* round toward negative infinity */
} fp_rnd_t;
__BEGIN_DECLS
extern fp_rnd_t fpgetround(void);
extern fp_rnd_t fpsetround(fp_rnd_t);
extern fp_except_t fpgetmask(void);
extern fp_except_t fpsetmask(fp_except_t);
extern fp_except_t fpgetsticky(void);
__END_DECLS
#endif /* _MACHINE_IEEEFP_H_ */