freebsd-dev/sys/sparc64/include/ieeefp.h

/*-
 * 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_ */
/* -> /*- for license, minor formatting changes 2005-01-07 02:29:27 +00:00			`/*-`
Add kernel headers needed to build libc. Some are bogus and/or just enough to compile. Mostly obtained from: netbsd 2001-11-18 17:56:46 +00:00			`* Written by J.T. Conklin, Apr 6, 1995`
			`* Public domain.`
			`* $FreeBSD$`
			`*/`

Standardize idempotentcy ifdefs. 2001-11-18 20:30:16 +00:00			`#ifndef _MACHINE_IEEEFP_H_`
			`#define _MACHINE_IEEEFP_H_`
Add kernel headers needed to build libc. Some are bogus and/or just enough to compile. Mostly obtained from: netbsd 2001-11-18 17:56:46 +00:00
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			`/* Deprecated FPU control interface */`

Use the definitions in machine/fsr.h instead of duplicating these magic numbers here (the values need to correspond to the %fsr ones for some libc functions to work right). 2002-09-14 18:00:44 +00:00			`#include <machine/fsr.h>`

Add kernel headers needed to build libc. Some are bogus and/or just enough to compile. Mostly obtained from: netbsd 2001-11-18 17:56:46 +00:00			`typedef int fp_except_t;`
Use the definitions in machine/fsr.h instead of duplicating these magic numbers here (the values need to correspond to the %fsr ones for some libc functions to work right). 2002-09-14 18:00:44 +00:00			`#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 */`
Add kernel headers needed to build libc. Some are bogus and/or just enough to compile. Mostly obtained from: netbsd 2001-11-18 17:56:46 +00:00
			`typedef enum {`
Use the definitions in machine/fsr.h instead of duplicating these magic numbers here (the values need to correspond to the %fsr ones for some libc functions to work right). 2002-09-14 18:00:44 +00:00			`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 */`
Add kernel headers needed to build libc. Some are bogus and/or just enough to compile. Mostly obtained from: netbsd 2001-11-18 17:56:46 +00:00			`} fp_rnd_t;`

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			`__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`


Standardize idempotentcy ifdefs. 2001-11-18 20:30:16 +00:00			`#endif /* _MACHINE_IEEEFP_H_ */`