GCC-typedefs.c

/*
 * Copyright (c) 2016 Simon Schmidt
 *
 * This software is provided 'as-is', without any express or implied
 * warranty. Permission is granted to anyone to use this software for
 * any purpose, including commercial applications, and to alter it and
 * redistribute it freely.
 */

/*
 * https://gcc.gnu.org/onlinedocs/gcc/Common-Variable-Attributes.html#Common-Variable-Attributes
 * https://gcc.gnu.org/onlinedocs/gccint/Machine-Modes.html
 */

typedef int byte_t __attribute__((mode(__byte__)));

typedef int register_t __attribute__((mode(__word__)));

typedef int intptr_t __attribute__((mode(__pointer__)));

/* Quarter-Integer mode represents a single byte treated as an integer. */
typedef int int8_t __attribute__((mode(__QI__)));

/* Half-Integer mode represents a two-byte integer. */
typedef int int16_t __attribute__((mode(__HI__)));

/* Single Integer mode represents a four-byte integer. */
typedef int int32_t __attribute__((mode(__SI__)));

/* Double Integer mode represents an eight-byte integer. */
typedef int int64_t __attribute__((mode(__DI__)));

/* Non-Standard integers. WARNING: may be uncompileable. */

/* Tetra Integer (?) mode represents a sixteen-byte integer.  */
typedef int int_128_t __attribute__((mode(__TI__)));

/* Octa Integer (?) mode represents a thirty-two-byte integer. */
typedef int int_256_t __attribute__((mode(__OI__)));

/* Hexadeca Integer (?) mode represents a sixty-four-byte integer. */
typedef int int_512_t __attribute__((mode(__HI__)));

/* Booleans */

/* mode represents a single bit, for predicate registers.  */
typedef unsigned int bool __attribute__((mode(__BI__)));