llvm-project/compiler-rt/lib/int_lib.h

/* ===-- int_lib.h - configuration header for libgcc replacement -----------===
 *
 *                     The LLVM Compiler Infrastructure
 *
 * This file is distributed under the University of Illinois Open Source
 * License. See LICENSE.TXT for details.
 *
 * ===----------------------------------------------------------------------===
 *
 * This file is a configuration header for libgcc replacement.
 * This file is not part of the interface of this library.
 *
 * ===----------------------------------------------------------------------===
 */

#ifndef INT_LIB_H
#define INT_LIB_H

/* Assumption:  signed integral is 2's complement */
/* Assumption:  right shift of signed negative is arithmetic shift */

#include <limits.h>
#include "endianness.h"
#include <math.h>

#if !defined(INFINITY) && defined(HUGE_VAL)
#define INFINITY HUGE_VAL
#endif /* INFINITY */

typedef      int si_int;
typedef unsigned su_int;

typedef          long long di_int;
typedef unsigned long long du_int;

typedef union
{
    di_int all;
    struct
    {
#if _YUGA_LITTLE_ENDIAN
        su_int low;
        si_int high;
#else
        si_int high;
        su_int low;
#endif /* _YUGA_LITTLE_ENDIAN */
    };
} dwords;

typedef union
{
    du_int all;
    struct
    {
#if _YUGA_LITTLE_ENDIAN
        su_int low;
        su_int high;
#else
        su_int high;
        su_int low;
#endif /* _YUGA_LITTLE_ENDIAN */
    };
} udwords;

#if __x86_64

typedef int      ti_int __attribute__ ((mode (TI)));
typedef unsigned tu_int __attribute__ ((mode (TI)));

typedef union
{
    ti_int all;
    struct
    {
#if _YUGA_LITTLE_ENDIAN
        du_int low;
        di_int high;
#else
        di_int high;
        du_int low;
#endif /* _YUGA_LITTLE_ENDIAN */
    };
} twords;

typedef union
{
    tu_int all;
    struct
    {
#if _YUGA_LITTLE_ENDIAN
        du_int low;
        du_int high;
#else
        du_int high;
        du_int low;
#endif /* _YUGA_LITTLE_ENDIAN */
    };
} utwords;

#endif /* __x86_64 */

typedef union
{
    su_int u;
    float f;
} float_bits;

typedef union
{
    udwords u;
    double  f;
} double_bits;

typedef struct
{
#if _YUGA_LITTLE_ENDIAN
    udwords low;
    udwords high;
#else
    udwords high;
    udwords low;
#endif /* _YUGA_LITTLE_ENDIAN */
} uqwords;

typedef union
{
    uqwords     u;
    long double f;
} long_double_bits;

#endif /* INT_LIB_H */