__movsb

Microsoft Specific

Generates a Move String (rep movsb) instruction.

void __movsb( 
   unsigned char* Destination, 
   unsigned const char* Source, 
   size_t Count 
);

Parameters

• [out] Destination
  A pointer to the destination of the copy.

• [in] Source
  A pointer to the source of the copy.

• [in] Count
  The number of bytes to copy.

Requirements

Header file <intrin.h>

Remarks

The result is that the first Count bytes pointed to by Source are copied to the Destination string.

This routine is only available as an intrinsic.

Example

// movsb.cpp
// processor: x86, x64
#include <stdio.h>
#include <intrin.h>

#pragma intrinsic(__movsb)

int main()
{
    unsigned char s1[100];
    unsigned char s2[100] = "A big black dog.";
    __movsb(s1, s2, 100);

    printf_s("%s %s", s1, s2);
}

A big black dog. A big black dog.

See Also

Concepts

Compiler Intrinsics