_mm_getexp_round_sh
Classification
AVX-512, Miscellaneous, CPUID Test: AVX512_FP16
Header File
immintrin.h
Instruction
VGETEXPSH xmm, xmm, xmm {sae}
Synopsis
 _mm_getexp_round_sh(__m128h a, __m128h b, const int sae);
Description
Convert the exponent of the lower half-precision (16-bit) floating-point element in "b" to a half-precision (16-bit) floating-point number representing the integer exponent, store the result in the lower element of "dst", and copy the upper 7 packed elements from "a" to the upper elements of "dst". This intrinsic essentially calculates "floor(log2(x))" for the lower element. [sae_note]
Operation
dst.fp16[0] := ConvertExpFP16(b.fp16[0])
dst[127:16] := a[127:16]
dst[MAX:128] := 0