_mm_ceil_pd
Microsoft Specific
Emits the Streaming SIMD Extensions 4 (SSE4) instruction roundpd. This instruction rounds up a packed double precision floating point value.
__m128d _mm_ceil_pd(
__m128d a
);
Parameters
- [in] a
A 128-bit parameter that contains two 64-bit floating point values.
Return value
r0 := CEIL(a0)
r1 := CEIL(a1)
Requirements
Intrinsic |
Architecture |
|---|---|
_mm_ceil_pd |
x86, x64 |
Header file <smmintrin.h>
Remarks
r0, a0 are the low order 64 bits of return value r and parameter a.
r1, a1 are the high order 64 bits of return value r and parameter a.
This function is implemented as a macro that invokes intrinsic _mm_round_pd with appropriate rounding control.
Before using this intrinsic, software must ensure that the processor supports the instruction.
Example
#include <stdio.h>
#include <smmintrin.h>
int main () {
__m128d a;
a.m128d_f64[1] = 10.4;
a.m128d_f64[0] = -6.5;
__m128d res = _mm_ceil_pd( a );
printf_s("Original a: %8f %8f\n",
a.m128d_f64[1], a.m128d_f64[0]);
printf_s("Result res: %8f %8f\n",
res.m128d_f64[1], res.m128d_f64[0]);
return 0;
}
Original a: 10.400000 -6.500000
Result res: 11.000000 -6.000000