Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
Export (0) Print
Expand All
Expand Minimize
Important This document may not represent best practices for current development, links to downloads and other resources may no longer be valid. Current recommended version can be found here.

_mm_ceil_sd

Microsoft Specific

Emits the Streaming SIMD Extensions 4 (SSE4) instruction roundsd. This instruction rounds up a double precision floating point value.

__m128d _mm_ceil_sd( 
   __m128d a,
   __m128d b
);

[in] a

A 128-bit parameter that contains two 64-bit floating point values.

[in] b

A 128-bit parameter that contains a 64-bit floating point value in the low quadword.

r0 := CEIL(b0)
r1 := a1

Intrinsic

Architecture

_mm_ceil_sd

x86, x64

Header file <smmintrin.h>

r0, a0, and b0 are the low order 64 bits of return value r and parameters a and b.

r1, a1, and b0 are the high order 64 bits of return value r and parameters a and b.

This function is implemented as a macro that invokes intrinsic _mm_round_sd with appropriate rounding control.

Before using this intrinsic, software must ensure that the processor supports the instruction.

#include <stdio.h>
#include <smmintrin.h>

int main () {
    __m128d a;
    __m128d b;

    a.m128d_f64[1] = 10.4;
    a.m128d_f64[0] = -6.5;
    b.m128d_f64[1] = 0;
    b.m128d_f64[0] = 625.57;

    __m128d res = _mm_ceil_sd( a, b );

    printf_s("Original a: %10f %10f\nOriginal b: %10f %10f\n",
                a.m128d_f64[1], a.m128d_f64[0],
                b.m128d_f64[1], b.m128d_f64[0]);

    printf_s("Result res: %10f %10f\n",
               res.m128d_f64[1], res.m128d_f64[0]);

    return 0;
}
Original a: 10.400000 -6.500000 Original b: 0.000000 625.570000 Result res: 10.400000 626.000000

Community Additions

ADD
Show:
© 2015 Microsoft