_mm512_i64extgather_pd
Classification
KNC, Load, CPUID Test: KNCNI
Header File
Synopsis
_mm512_i64extgather_pd(__m512i vindex, void const * base_addr, _MM_UPCONV_PD_ENUM conv, int scale, int hint);
Description
Up-converts 8 double-precision (64-bit) floating-point elements stored in memory starting at location "base_addr" at packed 64-bit integer indices stored in "vindex" scaled by "scale" using "conv" to 64-bit floating-point elements and stores them in "dst". "hint" indicates to the processor whether the data is non-temporal.
Operation
FOR j := 0 to 7
i := j*64
m := j*64
addr := base_addr + vindex[m+63:m] * ZeroExtend64(scale) * 8
CASE conv OF
_MM_UPCONV_PD_NONE: dst[i+63:i] := MEM[addr+63:addr]
ESAC
ENDFOR
dst[MAX:512] := 0