_mm512_prefetch_i32gather_pd
Classification
AVX-512, Load, CPUID Test: AVX512PF
Header File
immintrin.h
Instruction
VGATHERPF0DPD vm32y
Synopsis
 _mm512_prefetch_i32gather_pd(__m256i vindex, void const* base_addr, int scale, int hint);
Description
Prefetch double-precision (64-bit) floating-point elements from memory using 32-bit indices. 64-bit elements are loaded from addresses starting at "base_addr" and offset by each 32-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*32
	addr := base_addr + SignExtend64(vindex[m+31:m]) * ZeroExtend64(scale) * 8
	Prefetch(MEM[addr+63:addr], hint)
ENDFOR