tiny.simd.satWidenMulAccumFixedPoint

1pub fn satWidenMulAccumFixedPoint(2    comptime DW: type,3    a: anytype,4    b: @TypeOf(a),5    sum: DW.Vector,6) DW.Vector {7    if (comptime DW.Lane != i32 or sourceLane(@TypeOf(a)) != i16 or8        sourceLaneCount(@TypeOf(a)) != DW.lane_count)9    {10        @compileError("satWidenMulAccumFixedPoint requires same-lane-count i16 sources with i32 output");11    }12    var result: DW.Vector = undefined;13    inline for (0..DW.lane_count) |index| {14        const value = @as(i64, sum[index]) +15            @as(i64, a[index]) * @as(i64, b[index]) * 2;16        result[index] = @intCast(std.math.clamp(17            value,18            @as(i64, std.math.minInt(i32)),19            @as(i64, std.math.maxInt(i32)),20        ));21    }22    return result;23}

1pub const satWidenMulAccumFixedPoint = multiply.satWidenMulAccumFixedPoint;