tools.cpp

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// Copyright (C) Alexander Telyatnikov, Ivan Keliukh, Yegor Anchishkin, SKIF Software, 1999-2013. Kiev, Ukraine
// All rights reserved
// This file was released under the GPLv2 on June 2015.
/*
Module Name:
 
    tools.cpp
 
Abstract:
 
    This module contains some useful functions for data manipulation.
 
Environment:
 
 */
 
#ifdef __cplusplus
extern "C" {
#endif
 
//----------------
 
#include "tools.h"
 
//----------------
 
#ifdef _X86_
 
__declspec (naked)
void
__fastcall
_MOV_DD_SWP(
    void* a, // ECX
    void* b  // EDX
    )
{
  _asm {
    mov   eax,[edx]
    bswap eax
    mov   [ecx],eax
    ret
  }
}
 
__declspec (naked)
void
__fastcall
_MOV_DW_SWP(
    void* a, // ECX
    void* b  // EDX
    )
{
  _asm {
    mov   ax,[edx]
    rol   ax,8
    mov   [ecx],ax
    ret
  }
}
 
__declspec (naked)
void
__fastcall
_REVERSE_DD(
    void* a  // ECX
    )
{
  _asm {
    mov   eax,[ecx]
    bswap eax
    mov   [ecx],eax
    ret
  }
}
 
__declspec (naked)
void
__fastcall
_REVERSE_DW(
    void* a  // ECX
    )
{
  _asm {
    mov   ax,[ecx]
    rol   ax,8
    mov   [ecx],ax
    ret
  }
}
 
__declspec (naked)
void
__fastcall
_MOV_DW2DD_SWP(
    void* a, // ECX
    void* b  // EDX
    )
{
  _asm {
    mov   ax,[edx]
    rol   ax,8
    mov   [ecx+2],ax
    mov   [ecx],0
    ret
  }
}
 
__declspec (naked)
void
__fastcall
_MOV_MSF(
    void* a, // ECX
    void* b  // EDX
    )
{
  _asm {
    mov   eax,[edx]
    mov   [ecx],ax
    shr   eax,16
    mov   [ecx+2],al
    ret
  }
}
 
__declspec (naked)
void
__fastcall
_MOV_MSF_SWP(
    void* a, // ECX
    void* b  // EDX
    )
{
  _asm {
    mov   eax,[edx]
    mov   [ecx+2],al
    bswap eax
    shr   eax,8
    mov   [ecx],ax
    ret
  }
}
 
__declspec (naked)
void
__fastcall
_XCHG_DD(
    void* a, // ECX
    void* b  // EDX
    )
{
  _asm {
    mov   eax,[edx]
    xchg  eax,[ecx]
    mov   [edx],eax
    ret
  }
}
 
#endif _X86_
 
#ifdef __cplusplus
};
#endif