_mm_cvtss_f32
Microsoft Specific
Extracts the lower order floating point value from the parameter.
float _mm_cvtss_f32(
__m128 a
);
Parameters
- [in] a
A 128-bit parameter that contains a floating point value in the lower 32 bits.
Return value
The result can be expressed with the following equation:
r := a0
Requirements
Intrinsic |
Architecture |
|---|---|
_mm_cvtss_f32 |
x86, x64 |
Header file <xmmintrin.h>
Remarks
r is the 32-bit floating point result. a0 is the lower 32 bits of parameter a. The upper 96 bits of a are ignored.
Before you use this intrinsic, software must ensure that the processor supports the instruction.
Example
#include <stdio.h>
#include <xmmintrin.h>
int main ()
{
__m128 a;
a.m128_f32[0] = -3.5;
float res = _mm_cvtss_f32(a);
printf_s("Original a: %f\n", a.m128_f32[0]);
printf_s("Result res: %f\n", res);
return 0;
}
Original a: -3.500000 Result res: -3.500000