_mm512_getexp_round_pd
Classification
KNC, Miscellaneous, CPUID Test: KNCNI
Header File
Instruction
VGETEXPPD zmm, zmm {sae}
Synopsis
_mm512_getexp_round_pd(__m512d a, int sae);
Description
Convert the exponent of each packed double-precision (64-bit) floating-point element in "a" to a double-precision (64-bit) floating-point number representing the integer exponent, and store the results in "dst". This intrinsic essentially calculates "floor(log2(x))" for each element.
[sae_note]
Operation
FOR j := 0 to 7
i := j*64
dst[i+63:i] := ConvertExpFP64(a[i+63:i])
ENDFOR
dst[MAX:512] := 0