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Diffstat (limited to 'src/VBox/Runtime/common/math/gcc/quad.h')
| -rw-r--r-- | src/VBox/Runtime/common/math/gcc/quad.h | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/math/gcc/quad.h b/src/VBox/Runtime/common/math/gcc/quad.h new file mode 100644 index 00000000..c4197795 --- /dev/null +++ b/src/VBox/Runtime/common/math/gcc/quad.h @@ -0,0 +1,174 @@ +/* $NetBSD: quad.h,v 1.17 2005/12/11 12:24:37 christos Exp $ */ + +/*- + * Copyright (c) 1992, 1993 + * The Regents of the University of California. All rights reserved. + * + * This software was developed by the Computer Systems Engineering group + * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and + * contributed to Berkeley. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)quad.h 8.1 (Berkeley) 6/4/93 + */ + +#ifndef IPRT_INCLUDED_COMMON_MATH_quad_h +#define IPRT_INCLUDED_COMMON_MATH_quad_h +#ifndef RT_WITHOUT_PRAGMA_ONCE +# pragma once +#endif + +/* + * Quad arithmetic. + * + * This library makes the following assumptions: + * + * - The type long long (aka quad_t) exists. + * + * - A quad variable is exactly twice as long as `int'. + * + * - The machine's arithmetic is two's complement. + * + * This library can provide 128-bit arithmetic on a machine with 128-bit + * quads and 64-bit ints, for instance, or 96-bit arithmetic on machines + * with 48-bit ints. + */ + +#if 0 /* iprt */ +#include <sys/types.h> +#if !defined(_KERNEL) && !defined(_STANDALONE) +#include <limits.h> +#else +#include <machine/limits.h> +#endif +#else /* iprt */ +# include <iprt/types.h> +# include <iprt/nocrt/limits.h> +# undef __P +# define __P(a) a +# undef __GNUC_PREREQ__ +# define __GNUC_PREREQ__(m1,m2) 1 +# if 1 /* ASSUMES: little endian */ +# define _QUAD_HIGHWORD 1 +# define _QUAD_LOWWORD 0 +# else +# define _QUAD_HIGHWORD 0 +# define _QUAD_LOWWORD 1 +# endif +# if !defined(RT_OS_LINUX) || !defined(__KERNEL__) /* (linux/types.h defines u_int) */ + typedef unsigned int u_int; +# endif +# if !defined(RT_OS_SOLARIS) + typedef int64_t quad_t; +# else +# define quad_t int64_t +# endif + typedef uint64_t u_quad_t; + typedef quad_t *qaddr_t; +#endif /* iprt */ + +/* + * Depending on the desired operation, we view a `long long' (aka quad_t) in + * one or more of the following formats. + */ +union uu { + quad_t q; /* as a (signed) quad */ + u_quad_t uq; /* as an unsigned quad */ + int sl[2]; /* as two signed ints */ + u_int ul[2]; /* as two unsigned ints */ +}; + +/* + * Define high and low parts of a quad_t. + */ +#define H _QUAD_HIGHWORD +#define L _QUAD_LOWWORD + +/* + * Total number of bits in a quad_t and in the pieces that make it up. + * These are used for shifting, and also below for halfword extraction + * and assembly. + */ +#define QUAD_BITS (sizeof(quad_t) * CHAR_BIT) +#define INT_BITS (sizeof(int) * CHAR_BIT) +#define HALF_BITS (sizeof(int) * CHAR_BIT / 2) + +/* + * Extract high and low shortwords from longword, and move low shortword of + * longword to upper half of long, i.e., produce the upper longword of + * ((quad_t)(x) << (number_of_bits_in_int/2)). (`x' must actually be u_int.) + * + * These are used in the multiply code, to split a longword into upper + * and lower halves, and to reassemble a product as a quad_t, shifted left + * (sizeof(int)*CHAR_BIT/2). + */ +#define HHALF(x) ((u_int)(x) >> HALF_BITS) +#define LHALF(x) ((u_int)(x) & (((int)1 << HALF_BITS) - 1)) +#define LHUP(x) ((u_int)(x) << HALF_BITS) + +/* + * XXX + * Compensate for gcc 1 vs gcc 2. Gcc 1 defines ?sh?di3's second argument + * as u_quad_t, while gcc 2 correctly uses int. Unfortunately, we still use + * both compilers. + */ +#if __GNUC_PREREQ__(2, 0) || defined(lint) +typedef unsigned int qshift_t; +#else +typedef u_quad_t qshift_t; +#endif + +RT_C_DECLS_BEGIN +quad_t __adddi3 __P((quad_t, quad_t)); +quad_t __anddi3 __P((quad_t, quad_t)); +quad_t __ashldi3 __P((quad_t, qshift_t)); +quad_t __ashrdi3 __P((quad_t, qshift_t)); +int __cmpdi2 __P((quad_t, quad_t )); +quad_t __divdi3 __P((quad_t, quad_t)); +quad_t __fixdfdi __P((double)); +quad_t __fixsfdi __P((float)); +u_quad_t __fixunsdfdi __P((double)); +u_quad_t __fixunssfdi __P((float)); +double __floatdidf __P((quad_t)); +float __floatdisf __P((quad_t)); +double __floatunsdidf __P((u_quad_t)); +quad_t __iordi3 __P((quad_t, quad_t)); +quad_t __lshldi3 __P((quad_t, qshift_t)); +quad_t __lshrdi3 __P((quad_t, qshift_t)); +quad_t __moddi3 __P((quad_t, quad_t)); +quad_t __muldi3 __P((quad_t, quad_t)); +quad_t __negdi2 __P((quad_t)); +quad_t __one_cmpldi2 __P((quad_t)); +u_quad_t __qdivrem __P((u_quad_t, u_quad_t, u_quad_t *)); +quad_t __subdi3 __P((quad_t, quad_t)); +int __ucmpdi2 __P((u_quad_t, u_quad_t)); +u_quad_t __udivdi3 __P((u_quad_t, u_quad_t )); +u_quad_t __umoddi3 __P((u_quad_t, u_quad_t )); +quad_t __xordi3 __P((quad_t, quad_t)); +RT_C_DECLS_END + +#endif + |