_mm512_prefetch_i64gather_ps
Classification
AVX-512, Load, CPUID Test: AVX512PF
Header File
Instruction
VGATHERPF0QPS vm64z
Synopsis
_mm512_prefetch_i64gather_ps(__m512i vindex, void const* base_addr, int scale, int hint);
Description
Prefetch single-precision (32-bit) floating-point elements from memory using 64-bit indices. 32-bit elements are loaded from addresses starting at "base_addr" and offset by each 64-bit element in "vindex" (each index is scaled by the factor in "scale"). Gathered elements are merged in cache. "scale" should be 1, 2, 4 or 8. The "hint" parameter may be 1 (_MM_HINT_T0) for prefetching to L1 cache, or 2 (_MM_HINT_T1) for prefetching to L2 cache.
Operation
FOR j:= 0 to 7
i := j*64
m := j*64
addr := base_addr + vindex[m+63:m] * ZeroExtend64(scale) * 8
Prefetch(MEM[addr+31:addr], hint)
ENDFOR