source: trunk/minix/lib/gnu/ieee_float/ieee_float.h@ 10

/*
libc/ieee_float/ieee_float.h

Created:        Oct 14, 1993 by Philip Homburg <philip@cs.vu.nl>

Define structures and macros for manipulating IEEE floats
*/

#ifndef IEEE_FLOAT_H
#define IEEE_FLOAT_H

#define isnan __IsNan

struct f64
{
        u32_t low_word;
        u32_t high_word;
};

#define F64_SIGN_SHIFT  31
#define F64_SIGN_MASK   1

#define F64_EXP_SHIFT   20
#define F64_EXP_MASK    0x7ff
#define F64_EXP_BIAS    1023
#define F64_EXP_MAX     2047

#define F64_MANT_SHIFT  0
#define F64_MANT_MASK   0xfffff

#define F64_GET_SIGN(fp)        (((fp)->high_word >> F64_SIGN_SHIFT) & \
                                        F64_SIGN_MASK)
#define F64_GET_EXP(fp)         (((fp)->high_word >> F64_EXP_SHIFT) & \
                                        F64_EXP_MASK)
#define F64_SET_EXP(fp, val)    ((fp)->high_word= ((fp)->high_word &    \
                                ~(F64_EXP_MASK << F64_EXP_SHIFT)) |     \
                                (((val) & F64_EXP_MASK) << F64_EXP_SHIFT))

#define F64_GET_MANT_LOW(fp)            ((fp)->low_word)
#define F64_SET_MANT_LOW(fp, val)       ((fp)->low_word= (val))
#define F64_GET_MANT_HIGH(fp)   (((fp)->high_word >> F64_MANT_SHIFT) & \
                                        F64_MANT_MASK)
#define F64_SET_MANT_HIGH(fp, val)      ((fp)->high_word= ((fp)->high_word & \
                                ~(F64_MANT_MASK << F64_MANT_SHIFT)) |   \
                                (((val) & F64_MANT_MASK) << F64_MANT_SHIFT))

#endif /* IEEE_FLOAT_H */

/*
 * $PchId: ieee_float.h,v 1.3 1996/02/22 21:01:39 philip Exp $
 */