BFCVTN, BFCVTN2

Single-precision convert to BFloat16 (vector)

This instruction reads each single-precision element in the SIMD&FP source vector, converts each value to BFloat16 format, and writes the results in the lower or upper half of the SIMD&FP destination vector. The result elements are half the width of the source elements.

The BFCVTN instruction writes the half-width results to the lower half of the 128-bit SIMD&FP destination vector and clears the upper half to zero. The BFCVTN2 instruction writes the results to the upper half of the 128-bit SIMD&FP destination vector without affecting the lower half.

Vector single-precision to BFloat16
(FEAT_BF16)

Decode for this encoding

if !IsFeatureImplemented(FEAT_BF16) then EndOfDecode(Decode_UNDEF); end; let d : integer{} = UInt(Rd); let n : integer{} = UInt(Rn); let part : integer = UInt(Q); let elements : integer = 64 DIV 16;