Synopsis

int16x2 __shadd16(int16x2 val1,
                  int16x2 val2);

Description

__shadd16 inserts a SHADD16 instruction. __shadd16 returns the 16-bit signed equivalent of

• res[0] = (val1[0] + val2[0])/2
• res[1] = (val1[1] + val2[1])/2
  
  where [0] is the lower 16 bits and [1] is the upper 16 bits.