Developer Guide and Reference

Contents

_mm_cmp_ps, _mm256_cmp_ps

Compares packed float32 elements of two vectors. The corresponding Intel® AVX instruction is
VCMPPS
.

Syntax

extern __m128 _mm_cmp_ps(__m128 m1, __m128 m2, const int predicate);
extern __m256 _mm256_cmp_ps(__m256 m1, __m256 m2, const int predicate);
Arguments
m1
float32 vector used for the operation
m2
float32 vector also used for the operation
predicate
an immediate operand that specifies the type of comparison to be performed of the packed values; see
immintrin.h
file for the values to specify the type of comparison
Description
Performs a SIMD compare of the eight packed single-precision floating-point (float32) values in the first source operand,
m1
, and the second source operand,
m2
, and returns the results of the comparison.
The
_mm_cmp_ps
intrinsic is used for comparing 128-bit float32 values while the
_mm256_cmp_ps
intrinsic is used for comparing 256-bit float32 values.
The comparison
predicate
parameter (immediate) specifies the type of comparison performed on each of the pairs of packed values.
Returns
Result of the compare operation.

Product and Performance Information

1

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804