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mode_hdr.h
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mode_hdr.h
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/*
---------------------------------------------------------------------------
Copyright (c) 1998-2006, Brian Gladman, Worcester, UK. All rights reserved.
LICENSE TERMS
The free distribution and use of this software in both source and binary
form is allowed (with or without changes) provided that:
1. distributions of this source code include the above copyright
notice, this list of conditions and the following disclaimer;
2. distributions in binary form include the above copyright
notice, this list of conditions and the following disclaimer
in the documentation and/or other associated materials;
3. the copyright holder's name is not used to endorse products
built using this software without specific written permission.
DISCLAIMER
This software is provided 'as is' with no explicit or implied warranties
in respect of its properties, including, but not limited to, correctness
and/or fitness for purpose.
---------------------------------------------------------------------------
Issue Date: 20/12/2007
This header file is an INTERNAL file which supports mode implementation
*/
#ifndef _MODE_HDR_H
#define _MODE_HDR_H
#include <string.h>
#include <limits.h>
/* This define sets the units in which buffers are processed. This code
can provide significant speed gains if buffers can be processed in
32 or 64 bit chunks rather than in bytes. This define sets the units
in which buffers will be accessed if possible
*/
#if !defined( UNIT_BITS )
# if 1
# define UNIT_BITS 64
# elif 0
# define UNIT_BITS 32
# else
# define UNIT_BITS 8
# endif
#endif
#if UNIT_BITS == 64
# define NEED_UINT_64T
#endif
#include "brg_endian.h"
#include "brg_types.h"
/* Use of inlines is preferred but code blocks can also be expanded inline
using 'defines'. But the latter approach will typically generate a LOT
of code and is not recommended.
*/
#if 1 && !defined( USE_INLINING )
# define USE_INLINING
#endif
#if defined( _MSC_VER )
# if _MSC_VER >= 1400
# include <stdlib.h>
# include <intrin.h>
# pragma intrinsic(memset)
# pragma intrinsic(memcpy)
# define rotl32 _rotl
# define rotr32 _rotr
# define rotl64 _rotl64
# define rotr64 _rotl64
# define bswap_16(x) _byteswap_ushort(x)
# define bswap_32(x) _byteswap_ulong(x)
# define bswap_64(x) _byteswap_uint64(x)
# else
# define rotl32 _lrotl
# define rotr32 _lrotr
# endif
#endif
#if defined( USE_INLINING )
# if defined( _MSC_VER )
# define mh_decl __inline
# elif defined( __GNUC__ ) || defined( __GNU_LIBRARY__ )
# define mh_decl static inline
# else
# define mh_decl static
# endif
#endif
#if defined(__cplusplus)
extern "C" {
#endif
#define UI8_PTR(x) UPTR_CAST(x, 8)
#define UI16_PTR(x) UPTR_CAST(x, 16)
#define UI32_PTR(x) UPTR_CAST(x, 32)
#define UI64_PTR(x) UPTR_CAST(x, 64)
#define UNIT_PTR(x) UPTR_CAST(x, UNIT_BITS)
#define BUF_INC (UNIT_BITS >> 3)
#define BUF_ADRMASK ((UNIT_BITS >> 3) - 1)
#define rep2_u2(f,r,x) f( 0,r,x); f( 1,r,x)
#define rep2_u4(f,r,x) f( 0,r,x); f( 1,r,x); f( 2,r,x); f( 3,r,x)
#define rep2_u16(f,r,x) f( 0,r,x); f( 1,r,x); f( 2,r,x); f( 3,r,x); \
f( 4,r,x); f( 5,r,x); f( 6,r,x); f( 7,r,x); \
f( 8,r,x); f( 9,r,x); f(10,r,x); f(11,r,x); \
f(12,r,x); f(13,r,x); f(14,r,x); f(15,r,x)
#define rep2_d2(f,r,x) f( 1,r,x); f( 0,r,x)
#define rep2_d4(f,r,x) f( 3,r,x); f( 2,r,x); f( 1,r,x); f( 0,r,x)
#define rep2_d16(f,r,x) f(15,r,x); f(14,r,x); f(13,r,x); f(12,r,x); \
f(11,r,x); f(10,r,x); f( 9,r,x); f( 8,r,x); \
f( 7,r,x); f( 6,r,x); f( 5,r,x); f( 4,r,x); \
f( 3,r,x); f( 2,r,x); f( 1,r,x); f( 0,r,x)
#define rep3_u2(f,r,x,y) f( 0,r,x,y); f( 1,r,x,y)
#define rep3_u4(f,r,x,y) f( 0,r,x,y); f( 1,r,x,y); f( 2,r,x,y); f( 3,r,x,y)
#define rep3_u16(f,r,x,y) f( 0,r,x,y); f( 1,r,x,y); f( 2,r,x,y); f( 3,r,x,y); \
f( 4,r,x,y); f( 5,r,x,y); f( 6,r,x,y); f( 7,r,x,y); \
f( 8,r,x,y); f( 9,r,x,y); f(10,r,x,y); f(11,r,x,y); \
f(12,r,x,y); f(13,r,x,y); f(14,r,x,y); f(15,r,x,y)
#define rep3_d2(f,r,x,y) f( 1,r,x,y); f( 0,r,x,y)
#define rep3_d4(f,r,x,y) f( 3,r,x,y); f( 2,r,x,y); f( 1,r,x,y); f( 0,r,x,y)
#define rep3_d16(f,r,x,y) f(15,r,x,y); f(14,r,x,y); f(13,r,x,y); f(12,r,x,y); \
f(11,r,x,y); f(10,r,x,y); f( 9,r,x,y); f( 8,r,x,y); \
f( 7,r,x,y); f( 6,r,x,y); f( 5,r,x,y); f( 4,r,x,y); \
f( 3,r,x,y); f( 2,r,x,y); f( 1,r,x,y); f( 0,r,x,y)
/* function pointers might be used for fast XOR operations */
typedef void (*xor_function)(void* r, const void* p, const void* q);
/* left and right rotates on 32 and 64 bit variables */
#if !defined( rotl32 ) // NOTE: 0 <= n <= 32 ASSUMED
mh_decl uint_32t rotl32(uint_32t x, int n)
{
return (((x) << n) | ((x) >> (32 - n)));
}
#endif
#if !defined( rotr32 ) // NOTE: 0 <= n <= 32 ASSUMED
mh_decl uint_32t rotr32(uint_32t x, int n)
{
return (((x) >> n) | ((x) << (32 - n)));
}
#endif
#if !defined( rotl64 ) // NOTE: 0 <= n <= 64 ASSUMED
mh_decl uint_64t rotl64(uint_64t x, int n)
{
return (((x) << n) | ((x) >> (64 - n)));
}
#endif
#if !defined( rotr64 ) // NOTE: 0 <= n <= 64 ASSUMED
mh_decl uint_64t rotr64(uint_64t x, int n)
{
return (((x) >> n) | ((x) << (64 - n)));
}
#endif
/* byte order inversions for 16, 32 and 64 bit variables */
#if !defined(bswap_16)
mh_decl uint_16t bswap_16(uint_16t x)
{
return (x >> 8) | (x << 8);
}
#endif
#if !defined(bswap_32)
mh_decl uint_32t bswap_32(uint_32t x)
{
return ((rotr32((x), 24) & 0x00ff00ff) | (rotr32((x), 8) & 0xff00ff00));
}
#endif
#if !defined(bswap_64)
mh_decl uint_64t bswap_64(uint_64t x)
{
return bswap_32((uint_32t)(x >> 32)) | ((uint_64t)bswap_32((uint_32t)x) << 32);
}
#endif
/* support for fast aligned buffer move, xor and byte swap operations -
source and destination buffers for move and xor operations must not
overlap, those for byte order revesal must either not overlap or
must be identical
*/
#define f_move(n,p,q) p[n] = q[n]
#define f_xor(n,r,p,q) r[n] = p[n] ^ q[n]
mh_decl void move_block(void* p, const void* q)
{
memcpy(p, q, 16);
}
mh_decl void move_block_aligned(void *p, const void *q)
{
#if UNIT_BITS == 8
memcpy(p, q, 16);
#elif UNIT_BITS == 32
rep2_u4(f_move,UNIT_PTR(p),UNIT_PTR(q));
#else
rep2_u2(f_move,UNIT_PTR(p),UNIT_PTR(q));
#endif
}
mh_decl void xor_block(void *r, const void* p, const void* q)
{
rep3_u16(f_xor, UI8_PTR(r), UI8_PTR(p), UI8_PTR(q));
}
mh_decl void xor_block_aligned(void *r, const void *p, const void *q)
{
#if UNIT_BITS == 8
rep3_u16(f_xor, UNIT_PTR(r), UNIT_PTR(p), UNIT_PTR(q));
#elif UNIT_BITS == 32
rep3_u4(f_xor, UNIT_PTR(r), UNIT_PTR(p), UNIT_PTR(q));
#else
rep3_u2(f_xor, UNIT_PTR(r), UNIT_PTR(p), UNIT_PTR(q));
#endif
}
mh_decl void bswap32_block(void *d, const void* s)
{
#if UNIT_BITS == 8
uint_8t t;
t = UNIT_PTR(s)[ 0]; UNIT_PTR(d)[ 0] = UNIT_PTR(s)[ 3]; UNIT_PTR(d)[ 3] = t;
t = UNIT_PTR(s)[ 1]; UNIT_PTR(d)[ 1] = UNIT_PTR(s)[ 2]; UNIT_PTR(d)[ 2] = t;
t = UNIT_PTR(s)[ 4]; UNIT_PTR(d)[ 4] = UNIT_PTR(s)[ 7]; UNIT_PTR(d)[ 7] = t;
t = UNIT_PTR(s)[ 5]; UNIT_PTR(d)[ 5] = UNIT_PTR(s)[ 6]; UNIT_PTR(d) [6] = t;
t = UNIT_PTR(s)[ 8]; UNIT_PTR(d)[ 8] = UNIT_PTR(s)[11]; UNIT_PTR(d)[12] = t;
t = UNIT_PTR(s)[ 9]; UNIT_PTR(d)[ 9] = UNIT_PTR(s)[10]; UNIT_PTR(d)[10] = t;
t = UNIT_PTR(s)[12]; UNIT_PTR(d)[12] = UNIT_PTR(s)[15]; UNIT_PTR(d)[15] = t;
t = UNIT_PTR(s)[13]; UNIT_PTR(d)[ 3] = UNIT_PTR(s)[14]; UNIT_PTR(d)[14] = t;
#elif UNIT_BITS == 32
UNIT_PTR(d)[0] = bswap_32(UNIT_PTR(s)[0]); UNIT_PTR(d)[1] = bswap_32(UNIT_PTR(s)[1]);
UNIT_PTR(d)[2] = bswap_32(UNIT_PTR(s)[2]); UNIT_PTR(d)[3] = bswap_32(UNIT_PTR(s)[3]);
#else
UI32_PTR(d)[0] = bswap_32(UI32_PTR(s)[0]); UI32_PTR(d)[1] = bswap_32(UI32_PTR(s)[1]);
UI32_PTR(d)[2] = bswap_32(UI32_PTR(s)[2]); UI32_PTR(d)[3] = bswap_32(UI32_PTR(s)[3]);
#endif
}
mh_decl void bswap64_block(void *d, const void* s)
{
#if UNIT_BITS == 8
uint_8t t;
t = UNIT_PTR(s)[ 0]; UNIT_PTR(d)[ 0] = UNIT_PTR(s)[ 7]; UNIT_PTR(d)[ 7] = t;
t = UNIT_PTR(s)[ 1]; UNIT_PTR(d)[ 1] = UNIT_PTR(s)[ 6]; UNIT_PTR(d)[ 6] = t;
t = UNIT_PTR(s)[ 2]; UNIT_PTR(d)[ 2] = UNIT_PTR(s)[ 5]; UNIT_PTR(d)[ 5] = t;
t = UNIT_PTR(s)[ 3]; UNIT_PTR(d)[ 3] = UNIT_PTR(s)[ 3]; UNIT_PTR(d) [3] = t;
t = UNIT_PTR(s)[ 8]; UNIT_PTR(d)[ 8] = UNIT_PTR(s)[15]; UNIT_PTR(d)[15] = t;
t = UNIT_PTR(s)[ 9]; UNIT_PTR(d)[ 9] = UNIT_PTR(s)[14]; UNIT_PTR(d)[14] = t;
t = UNIT_PTR(s)[10]; UNIT_PTR(d)[10] = UNIT_PTR(s)[13]; UNIT_PTR(d)[13] = t;
t = UNIT_PTR(s)[11]; UNIT_PTR(d)[11] = UNIT_PTR(s)[12]; UNIT_PTR(d)[12] = t;
#elif UNIT_BITS == 32
uint_32t t;
t = bswap_32(UNIT_PTR(s)[0]); UNIT_PTR(d)[0] = bswap_32(UNIT_PTR(s)[1]); UNIT_PTR(d)[1] = t;
t = bswap_32(UNIT_PTR(s)[2]); UNIT_PTR(d)[2] = bswap_32(UNIT_PTR(s)[2]); UNIT_PTR(d)[3] = t;
#else
UNIT_PTR(d)[0] = bswap_64(UNIT_PTR(s)[0]); UNIT_PTR(d)[1] = bswap_64(UNIT_PTR(s)[1]);
#endif
}
mh_decl void bswap128_block(void *d, const void* s)
{
#if UNIT_BITS == 8
uint_8t t;
t = UNIT_PTR(s)[0]; UNIT_PTR(d)[0] = UNIT_PTR(s)[15]; UNIT_PTR(d)[15] = t;
t = UNIT_PTR(s)[1]; UNIT_PTR(d)[1] = UNIT_PTR(s)[14]; UNIT_PTR(d)[14] = t;
t = UNIT_PTR(s)[2]; UNIT_PTR(d)[2] = UNIT_PTR(s)[13]; UNIT_PTR(d)[13] = t;
t = UNIT_PTR(s)[3]; UNIT_PTR(d)[3] = UNIT_PTR(s)[12]; UNIT_PTR(d)[12] = t;
t = UNIT_PTR(s)[4]; UNIT_PTR(d)[4] = UNIT_PTR(s)[11]; UNIT_PTR(d)[11] = t;
t = UNIT_PTR(s)[5]; UNIT_PTR(d)[5] = UNIT_PTR(s)[10]; UNIT_PTR(d)[10] = t;
t = UNIT_PTR(s)[6]; UNIT_PTR(d)[6] = UNIT_PTR(s)[ 9]; UNIT_PTR(d)[ 9] = t;
t = UNIT_PTR(s)[7]; UNIT_PTR(d)[7] = UNIT_PTR(s)[ 8]; UNIT_PTR(d)[ 8] = t;
#elif UNIT_BITS == 32
uint_32t t;
t = bswap_32(UNIT_PTR(s)[0]); UNIT_PTR(d)[0] = bswap_32(UNIT_PTR(s)[3]); UNIT_PTR(d)[3] = t;
t = bswap_32(UNIT_PTR(s)[1]); UNIT_PTR(d)[1] = bswap_32(UNIT_PTR(s)[2]); UNIT_PTR(d)[2] = t;
#else
uint_64t t;
t = bswap_64(UNIT_PTR(s)[0]); UNIT_PTR(d)[0] = bswap_64(UNIT_PTR(s)[1]); UNIT_PTR(d)[1] = t;
#endif
}
/* platform byte order to big or little endian order for 16, 32 and 64 bit variables */
#if PLATFORM_BYTE_ORDER == IS_BIG_ENDIAN
# define uint_16t_to_le(x) (x) = bswap_16((x))
# define uint_32t_to_le(x) (x) = bswap_32((x))
# define uint_64t_to_le(x) (x) = bswap_64((x))
# define uint_16t_to_be(x)
# define uint_32t_to_be(x)
# define uint_64t_to_be(x)
#else
# define uint_16t_to_le(x)
# define uint_32t_to_le(x)
# define uint_64t_to_le(x)
# define uint_16t_to_be(x) (x) = bswap_16((x))
# define uint_32t_to_be(x) (x) = bswap_32((x))
# define uint_64t_to_be(x) (x) = bswap_64((x))
#endif
#if defined(__cplusplus)
}
#endif
#endif