68 lines
1.4 KiB
C
68 lines
1.4 KiB
C
#ifndef __IEEE754_H_
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#define __IEEE754_H_
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union ieee754_float {
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float f;
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struct {
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#if BYTE_ORDER == BIG_ENDIAN
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unsigned int negative : 1;
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unsigned int exponent : 8;
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unsigned int mantissa : 23;
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#endif
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#if BYTE_ORDER == LITTLE_ENDIAN
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unsigned int mantissa : 23;
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unsigned int exponent : 8;
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unsigned int negative : 1;
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#endif
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} ieee;
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};
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#define IEEE754_FLOAT_BIAS 0x7f
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union ieee754_double {
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double d;
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struct {
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#if BYTE_ORDER == BIG_ENDIAN
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unsigned int negative : 1;
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unsigned int exponent : 11;
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unsigned int mantissa0 : 20;
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unsigned int mantissa1 : 32;
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#endif
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#if BYTE_ORDER == LITTLE_ENDIAN
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unsigned int mantissa1 : 32;
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unsigned int mantissa0 : 20;
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unsigned int exponent : 11;
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unsigned int negative : 1;
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#endif
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} ieee;
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};
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#define IEEE754_DOUBLE_BIAS 0x3ff
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union ieee854_long_double {
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long double d;
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struct {
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#if BYTE_ORDER == BIG_ENDIAN
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unsigned int negative : 1;
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unsigned int exponent : 15;
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unsigned int empty : 16;
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unsigned int mantissa0 : 32;
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unsigned int mantissa1 : 32;
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#endif
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#if BYTE_ORDER == LITTLE_ENDIAN
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unsigned int mantissa1 : 32;
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unsigned int mantissa0 : 32;
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unsigned int exponent : 15;
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unsigned int negative : 1;
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unsigned int empty : 16;
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#endif
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} ieee;
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};
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#define IEEE854_LONG_DOUBLE_BIAS 0x3fff
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#endif
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