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/* $OpenBSD: ieeefp.h,v 1.5 2007/12/29 16:57:19 miod Exp $ */
/* $NetBSD: ieeefp.h,v 1.1 1995/04/29 01:09:17 cgd Exp $ */
/*
* Written by J.T. Conklin, Apr 28, 1995
* Public domain.
*/
#ifndef _ALPHA_IEEEFP_H_
#define _ALPHA_IEEEFP_H_
typedef int fp_except;
#ifdef _KERNEL
#include <sys/param.h>
#include <sys/proc.h>
#include <machine/fpu.h>
#include <machine/cpu.h>
/* FP_X_IOV is intentionally omitted from the architecture flags mask */
#define FP_AA_FLAGS (FP_X_INV | FP_X_DZ | FP_X_OFL | FP_X_UFL | FP_X_IMP)
#define float_raise(f) \
do curproc->p_md.md_flags |= OPENBSD_FLAG_TO_FP_C(f); \
while(0)
#define float_set_inexact() float_raise(FP_X_IMP)
#define float_set_invalid() float_raise(FP_X_INV)
#define fpgetround() (alpha_read_fpcr() >> 58 & 3)
#endif
#define FP_X_INV 0x01 /* invalid operation exception */
#define FP_X_DZ 0x02 /* divide-by-zero exception */
#define FP_X_OFL 0x04 /* overflow exception */
#define FP_X_UFL 0x08 /* underflow exception */
#define FP_X_IMP 0x10 /* imprecise (loss of precision; "inexact") */
#define FP_X_IOV 0x20 /* integer overflow */
/*
* fp_rnd bits match the fpcr, below, as well as bits 12:11
* in fp operate instructions
*/
typedef enum {
FP_RZ = 0, /* round to zero (truncate) */
FP_RM = 1, /* round toward negative infinity */
FP_RN = 2, /* round to nearest representable number */
FP_RP = 3 /* round toward positive infinity */
} fp_rnd;
#endif /* _ALPHA_IEEEFP_H_ */
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