52 lines
1.2 KiB
C
52 lines
1.2 KiB
C
/*
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libc/ieee_float/ieee_float.h
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Created: Oct 14, 1993 by Philip Homburg <philip@cs.vu.nl>
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Define structures and macros for manipulating IEEE floats
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*/
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#ifndef IEEE_FLOAT_H
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#define IEEE_FLOAT_H
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#define isnan __IsNan
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struct f64
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{
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u32_t low_word;
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u32_t high_word;
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};
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#define F64_SIGN_SHIFT 31
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#define F64_SIGN_MASK 1
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#define F64_EXP_SHIFT 20
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#define F64_EXP_MASK 0x7ff
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#define F64_EXP_BIAS 1023
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#define F64_EXP_MAX 2047
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#define F64_MANT_SHIFT 0
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#define F64_MANT_MASK 0xfffff
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#define F64_GET_SIGN(fp) (((fp)->high_word >> F64_SIGN_SHIFT) & \
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F64_SIGN_MASK)
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#define F64_GET_EXP(fp) (((fp)->high_word >> F64_EXP_SHIFT) & \
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F64_EXP_MASK)
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#define F64_SET_EXP(fp, val) ((fp)->high_word= ((fp)->high_word & \
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~(F64_EXP_MASK << F64_EXP_SHIFT)) | \
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(((val) & F64_EXP_MASK) << F64_EXP_SHIFT))
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#define F64_GET_MANT_LOW(fp) ((fp)->low_word)
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#define F64_SET_MANT_LOW(fp, val) ((fp)->low_word= (val))
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#define F64_GET_MANT_HIGH(fp) (((fp)->high_word >> F64_MANT_SHIFT) & \
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F64_MANT_MASK)
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#define F64_SET_MANT_HIGH(fp, val) ((fp)->high_word= ((fp)->high_word & \
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~(F64_MANT_MASK << F64_MANT_SHIFT)) | \
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(((val) & F64_MANT_MASK) << F64_MANT_SHIFT))
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#endif /* IEEE_FLOAT_H */
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/*
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* $PchId: ieee_float.h,v 1.3 1996/02/22 21:01:39 philip Exp $
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*/
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