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Annotation of sys/arch/alpha/include/ieeefp.h, Revision 1.1.1.1

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_ */