__stosq
The latest version of this topic can be found at __stosq.
Microsoft Specific**
Generates a store string instruction (rep stosq).
Syntax
void __stosb(
unsigned __int64* Dest,
unsigned __int64 Data,
size_t Count
);
Parameters
[out] Dest
The destination of the operation.
[in] Data
The data to store.
[in] Count
The length of the block of quadwords to write.
Requirements
| Intrinsic | Architecture |
|---|---|
__stosq |
AMD64 |
Header file <intrin.h>
Remarks
The result is that the quadword Data is written into a block of Count quadwords in the Dest string.
This routine is only available as an intrinsic.
Example
// stosq.c
// processor: x64
#include <stdio.h>
#include <intrin.h>
#pragma intrinsic(__stosq)
int main()
{
unsigned __int64 val = 0xFFFFFFFFFFFFI64;
unsigned __int64 a[10];
memset(a, 0, sizeof(a));
__stosq(a+1, val, 2);
printf("%I64x %I64x %I64x %I64x", a[0], a[1], a[2], a[3]);
}
Output
0 ffffffffffff ffffffffffff 0