Synopsis

uint8x4 __uhsub8(uint8x4 val1,
                 uint8x4 val2);

Description

__uhsub8 inserts a UHSUB8 instruction. __uhsub8 returns the 8-bit unsigned equivalent of

• res[0] = (val1[0] - val2[0])/2
• res[1] = (val1[1] - val2[1])/2
• res[2] = (val1[2] - val2[2])/2
• res[3] = (val1[3] - val2[3])/2
  
  where [0] is the lower 8 bits and [3] is the upper 8 bits.