ARM Cortex-M4 - Page 115

The Cortex-M4 Instruction Set
ARM DUI 0553A Copyright © 2010 ARM. All rights reserved. 3-68
ID121610 Non-Confidential
Examples
UHASX R7, R4, R2 ; Adds top halfword of R4 with bottom halfword of R2
; and writes halved result to top halfword of R7
; Subtracts top halfword of R2 from bottom halfword of
; R7 and writes halved result to bottom halfword of R7
UHSAX R0, R3, R5 ; Subtracts bottom halfword of R5 from top halfword of
; R3 and writes halved result to top halfword of R0
; Adds top halfword of R5 to bottom halfword of R3 and
; writes halved result to bottom halfword of R0.