{ $description "Converts SIMD vectors of " { $snippet "from-type" } " to " { $snippet "to-type" } ". The number of inputs and outputs depends on the relationship of the two types:"
{ "If " { $snippet "to-type" } " is a floating-point vector type with the same byte length and element count as the integer vector type " { $snippet "from-type" } " (for example, from " { $snippet "int-4" } " to " { $snippet "float-4" } " or from " { $snippet "longlong-2" } " to " { $snippet "double-2" } "), " { $snippet "vconvert" } " takes one vector of " { $snippet "from-type" } " and converts its elements to floating-point, outputting one vector of " { $snippet "to-type" } "." }
{ "Likewise, if " { $snippet "to-type" } " is an integer vector type with the same byte length and element count as the floating-point vector type " { $snippet "from-type" } ", " { $snippet "vconvert" } " takes one vector of " { $snippet "from-type" } " and truncates its elements to integers, outputting one vector of " { $snippet "to-type" } "." }
{ "If " { $snippet "to-type" } " is a vector type with the same byte length as and twice the element count of the vector type " { $snippet "from-type" } " (for example, from " { $snippet "int-4" } " to " { $snippet "ushort-8" } ", from " { $snippet "double-2" } " to " { $snippet "float-4" } ", or from " { $snippet "short-8" } " to " { $snippet "char-16" } "), " { $snippet "vconvert" } " takes two vectors of " { $snippet "from-type" } " and packs them into one vector of " { $snippet "to-type" } ", saturating values too large or small to be representable as elements of " { $snippet "to-type" } "." }
{ "If " { $snippet "to-type" } " is a vector type with the same byte length as and half the element count of the vector type " { $snippet "from-type" } " (for example, from " { $snippet "ushort-8" } " to " { $snippet "int-4" } ", from " { $snippet "float-4" } " to " { $snippet "double-2" } ", or from " { $snippet "char-16" } " to " { $snippet "short-8" } "), " { $snippet "vconvert" } " takes one vector of " { $snippet "from-type" } " and unpacks it into two vectors of " { $snippet "to-type" } "." }
}
{ $snippet "from-type" } " and " { $snippet "to-type" } " must adhere to the following restrictions; a " { $link bad-vconvert } " error will be thrown otherwise:"
{ $list
{ { $snippet "from-type" } " and " { $snippet "to-type" } " must have the same byte length. You cannot currently convert between 128- and 256-bit vector types." }
{ "For conversions between floating-point and integer vectors, " { $snippet "from-type" } " and " { $snippet "to-type" } " must have the same element length." }
{ "For packing conversions, " { $snippet "from-type" } " and " { $snippet "to-type" } " must be both floating-point or both integer types. Integer types can be packed from signed to unsigned or from unsigned to unsigned types. Unsigned to signed packing is invalid." }
{ "For unpacking conversions, " { $snippet "from-type" } " and " { $snippet "to-type" } " must be both floating-point or both integer types. Integer types can be unpacked from unsigned to signed or from unsigned to unsigned types. Signed to unsigned unpacking is invalid." }
"The " { $vocab-link "math.vectors.conversion" } " vocabulary provides facilities for converting SIMD vectors between floating-point and integer representations and between different-sized integer representations."
