fpu.h

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#ifndef _ASM_IA64_FPU_H
#define _ASM_IA64_FPU_H

/*
 * Copyright (C) 1998, 1999, 2002, 2003 Hewlett-Packard Co
 *  David Mosberger-Tang <[email protected]>
 */

#include <linux/types.h>

/* floating point status register: */
#define FPSR_TRAP_VD    (1 << 0)    /* invalid op trap disabled */
#define FPSR_TRAP_DD    (1 << 1)    /* denormal trap disabled */
#define FPSR_TRAP_ZD    (1 << 2)    /* zero-divide trap disabled */
#define FPSR_TRAP_OD    (1 << 3)    /* overflow trap disabled */
#define FPSR_TRAP_UD    (1 << 4)    /* underflow trap disabled */
#define FPSR_TRAP_ID    (1 << 5)    /* inexact trap disabled */
#define FPSR_S0(x)  ((x) <<  6)
#define FPSR_S1(x)  ((x) << 19)
#define FPSR_S2(x)  (__IA64_UL(x) << 32)
#define FPSR_S3(x)  (__IA64_UL(x) << 45)

/* floating-point status field controls: */
#define FPSF_FTZ    (1 << 0)        /* flush-to-zero */
#define FPSF_WRE    (1 << 1)        /* widest-range exponent */
#define FPSF_PC(x)  (((x) & 0x3) << 2)  /* precision control */
#define FPSF_RC(x)  (((x) & 0x3) << 4)  /* rounding control */
#define FPSF_TD     (1 << 6)        /* trap disabled */

/* floating-point status field flags: */
#define FPSF_V      (1 <<  7)       /* invalid operation flag */
#define FPSF_D      (1 <<  8)       /* denormal/unnormal operand flag */
#define FPSF_Z      (1 <<  9)       /* zero divide (IEEE) flag */
#define FPSF_O      (1 << 10)       /* overflow (IEEE) flag */
#define FPSF_U      (1 << 11)       /* underflow (IEEE) flag */
#define FPSF_I      (1 << 12)       /* inexact (IEEE) flag) */

/* floating-point rounding control: */
#define FPRC_NEAREST    0x0
#define FPRC_NEGINF 0x1
#define FPRC_POSINF 0x2
#define FPRC_TRUNC  0x3

#define FPSF_DEFAULT    (FPSF_PC (0x3) | FPSF_RC (FPRC_NEAREST))

/* This default value is the same as HP-UX uses.  Don't change it
   without a very good reason.  */
#define FPSR_DEFAULT    (FPSR_TRAP_VD | FPSR_TRAP_DD | FPSR_TRAP_ZD \
             | FPSR_TRAP_OD | FPSR_TRAP_UD | FPSR_TRAP_ID   \
             | FPSR_S0 (FPSF_DEFAULT)           \
             | FPSR_S1 (FPSF_DEFAULT | FPSF_TD | FPSF_WRE)  \
             | FPSR_S2 (FPSF_DEFAULT | FPSF_TD)     \
             | FPSR_S3 (FPSF_DEFAULT | FPSF_TD))

# ifndef __ASSEMBLY__

struct ia64_fpreg {
    union {
        unsigned long bits[2];
        long double __dummy;    /* force 16-byte alignment */
    } u;
};

# endif /* __ASSEMBLY__ */

#endif /* _ASM_IA64_FPU_H */