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- /****************************************************************************
- *
- * $Source: /usr/local/cvsroot/gccsdk/unixlib/source/clib/machine/ieee754.h,v $
- * $Date: 2002/09/24 21:02:37 $
- * $Revision: 1.4 $
- * $State: Exp $
- * $Author: admin $
- *
- ***************************************************************************/
-
- #ifndef __MACHINE_IEEE754_H
- #define __MACHINE_IEEE754_H 1
-
- #ifndef __UNIXLIB_FEATURES_H
- #include <unixlib/features.h>
- #endif
-
- __BEGIN_DECLS
-
- union ieee754_float
- {
- float f;
-
- /* This is the IEEE 754 single-precision format. */
- struct
- {
- unsigned int mantissa:23;
- unsigned int exponent:8;
- unsigned int negative:1;
- } ieee;
-
- /* This format makes it easier to see if a NaN is a signalling NaN. */
- struct
- {
- unsigned int mantissa:22;
- unsigned int quiet_nan:1;
- unsigned int exponent:8;
- unsigned int negative:1;
- } ieee_nan;
- };
-
- #define IEEE754_FLOAT_BIAS 0x7f /* Added to exponent. */
-
-
- union ieee754_double
- {
- double d;
-
- /* This is the IEEE 754 double-precision format. */
- struct
- {
- unsigned int mantissa0:20;
- unsigned int exponent:11;
- unsigned int negative:1;
- unsigned int mantissa1:32;
- } ieee;
-
- /* This format makes it easier to see if a NaN is a signalling NaN. */
- struct
- {
- unsigned int mantissa0:19;
- unsigned int quiet_nan:1;
- unsigned int exponent:11;
- unsigned int negative:1;
- unsigned int mantissa1:32;
- } ieee_nan;
- };
-
- #define IEEE754_DOUBLE_BIAS 0x3ff /* Added to exponent. */
-
-
- union ieee854_long_double
- {
- long double d;
-
- /* This is the IEEE 854 double-extended-precision format. */
- struct
- {
- unsigned int exponent:15;
- unsigned int empty:16;
- unsigned int negative:1;
- unsigned int mantissa0:32;
- unsigned int mantissa1:32;
- } ieee;
-
- /* This is for NaNs in the IEEE 854 double-extended-precision format. */
- struct
- {
- unsigned int exponent:15;
- unsigned int empty:16;
- unsigned int negative:1;
- unsigned int mantissa0:30;
- unsigned int quiet_nan:1;
- unsigned int one:1;
- unsigned int mantissa1:32;
- } ieee_nan;
- };
-
- #define IEEE854_LONG_DOUBLE_BIAS 0x3fff
-
-
- extern double __ieee754_exp (double __x);
-
- __END_DECLS
-
- #endif
-