_mm_cvtsi64x_sd
Microsoft Specific
Generates the Convert Double Word Integer to Scalar Double-Precision Floating-Point Value (cvtsi2sd) instruction.
__m128d _mm_cvtsi64x_sd(
__m128d a
__int64 b
);
Parameters
- [in] a
An __m128d structure containing two double-precision floating-point values.
- [in] b
A 64-bit integer.
Return Value
An __m128d structure with the result of the conversion in the first position, and the second position copied from a.
Requirements
| Intrinsic | Architecture |
|---|---|
_mm_cvtsi64x_sd |
AMD64 |
Header file <intrin.h>
Remarks
The result of the conversion is placed in the first element of the __m128d structure passed in as a, and the result is returned. The __m128d structure represents an XMM register, so this intrinsic allows the value b from system memory to be placed in an XMM register.
This routine is only available as an intrinsic.
Example
// _mm_cvtsi64x_sd.cpp
// processor: x64
#include <intrin.h>
#include <stdio.h>
#pragma intrinsic(_mm_cvtsi64x_sd)
int main()
{
__m128d a;
__int64 b = 117;
double adbl[2] = { 1.8E6, 200.5 };
// loads the double values into d
// (moves data into the XMM registers)
a = _mm_loadu_pd (adbl);
// Copy b into the first element of a
a = _mm_cvtsi64x_sd(a, b);
printf_s("%lf %lf\n", a.m128d_f64[0], a.m128d_f64[1] );
}
Output
117.000000 200.500000