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Annotation of sys/arch/alpha/include/ieeefp.h, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: ieeefp.h,v 1.4 2002/04/28 20:55:14 pvalchev Exp $     */
        !             2: /*     $NetBSD: ieeefp.h,v 1.1 1995/04/29 01:09:17 cgd Exp $   */
        !             3:
        !             4: /*
        !             5:  * Written by J.T. Conklin, Apr 28, 1995
        !             6:  * Public domain.
        !             7:  */
        !             8:
        !             9: #ifndef _ALPHA_IEEEFP_H_
        !            10: #define _ALPHA_IEEEFP_H_
        !            11:
        !            12: typedef int fp_except;
        !            13:
        !            14: #ifdef _KERNEL
        !            15:
        !            16: #include <sys/param.h>
        !            17: #include <sys/proc.h>
        !            18: #include <machine/fpu.h>
        !            19: #include <machine/cpu.h>
        !            20:
        !            21: /* FP_X_IOV is intentionally omitted from the architecture flags mask */
        !            22:
        !            23: #define        FP_AA_FLAGS (FP_X_INV | FP_X_DZ | FP_X_OFL | FP_X_UFL | FP_X_IMP)
        !            24:
        !            25: #define float_raise(f)                                         \
        !            26:        do curproc->p_md.md_flags |= OPENBSD_FLAG_TO_FP_C(f);   \
        !            27:        while(0)
        !            28:
        !            29: #define        float_set_inexact()     float_raise(FP_X_IMP)
        !            30: #define        float_set_invalid()     float_raise(FP_X_INV)
        !            31: #define        fpgetround()            (alpha_read_fpcr() >> 58 & 3)
        !            32:
        !            33: #endif
        !            34:
        !            35: #define        FP_X_INV        0x01    /* invalid operation exception */
        !            36: #define        FP_X_DZ         0x02    /* divide-by-zero exception */
        !            37: #define        FP_X_OFL        0x04    /* overflow exception */
        !            38: #define        FP_X_UFL        0x08    /* underflow exception */
        !            39: #define        FP_X_IMP        0x10    /* imprecise (loss of precision; "inexact") */
        !            40: #define        FP_X_IOV        0x20    /* integer overflow */
        !            41:
        !            42: /*
        !            43:  * fp_rnd bits match the fpcr, below, as well as bits 12:11
        !            44:  * in fp operate instructions
        !            45:  */
        !            46: typedef enum {
        !            47:     FP_RZ = 0,                 /* round to zero (truncate) */
        !            48:     FP_RM = 1,                 /* round toward negative infinity */
        !            49:     FP_RN = 2,                 /* round to nearest representable number */
        !            50:     FP_RP = 3,                 /* round toward positive infinity */
        !            51:     _FP_DYNAMIC=FP_RP
        !            52: } fp_rnd;
        !            53:
        !            54: #endif /* _ALPHA_IEEEFP_H_ */