Intel® C++ Compiler Classic Developer Guide and Reference
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Visible to Intel only — GUID: GUID-544BB37B-07B1-4A2D-8BCC-B1820822BAA9
<span class='option'> _mm_log2_pd</span>, <span class='option'>_mm256_log2_pd</span>
Calculates base-2 logarithm. Vector variant of log2(x) function for a 128-bit/256-bit vector argument of float64 values.
extern __m128d _mm_log2_pd(__m128d v1); |
extern __m256d _mm256_log2_pd(__m256d v1); |
v1 |
vector with float64 values |
Calculates the base-2 logarithm of vector v1 elements.
128-bit/256-bit vector with the result of the operation.
Many routines in the Short Vector Math Library (SVML) are more optimized for Intel® microprocessors than for non-Intel microprocessors.