Intel® C++ Compiler 16.0 User and Reference Guide
These Intel® Streaming SIMD Extensions 4 (Intel® SSE4) rounding intrinsics cover scalar and packed single-precision and double-precision floating-point operands. The prototypes for these intrinsics are in the smmintrin.h file.
The floor and ceil intrinsics correspond to the definitions of floor and ceil in the ISO 9899:1999 standard for the C programming language.
|
Intrinsic Syntax |
Operation |
Corresponding
|
|---|---|---|
|
__m128d _mm_round_pd(__m128d s1, int iRoundMode) __m128d _mm_floor_pd(__m128d s1) __m128d _mm_ceil_pd(__m128d s1) |
Packed double-precision float rounding |
ROUNDPD |
|
__m128 _mm_round_ps(__m128 s1, int iRoundMode) __m128 _mm_floor_ps(__m128 s1) __m128 _mm_ceil_ps(__m128 s1) |
Packed single-precision float rounding |
ROUNDPS |
|
__m128d _mm_round_sd(__m128d dst, __m128d s1, int iRoundMode) __m128d _mm_floor_sd(__m128d dst, __m128d s1) __m128d _mm_ceil_sd(__m128d dst, __m128d s1) |
Single double-precision float rounding |
ROUNDSD |
|
__m128 _mm_round_ss(__m128 dst, __m128d s1, int iRoundMode) __m128 _mm_floor_ss(__m128d dst, __m128 s1) __m128 _mm_ceil_ss(__m128d dst, __m128 s1) |
Single single-precision float rounding |
ROUNDSS |