The Cortex-M4 Instruction Set
ARM DUI 0553A Copyright © 2010 ARM. All rights reserved. 3-92
ID121610 Non-Confidential
Examples
SMULBT R0, R4, R5 ; Multiplies the bottom halfword of R4 with the
; top halfword of R5, multiplies results and
; writes to R0
SMULBB R0, R4, R5 ; Multiplies the bottom halfword of R4 with the
; bottom halfword of R5, multiplies results and
; writes to R0
SMULTT R0, R4, R5 ; Multiplies the top halfword of R4 with the top
; halfword of R5, multiplies results and writes
; to R0
SMULTB R0, R4, R5 ; Multiplies the top halfword of R4 with the
; bottom halfword of R5, multiplies results and
; and writes to R0
SMULWT R4, R5, R3 ; Multiplies R5 with the top halfword of R3,
; extracts top 32 bits and writes to R4
SMULWB R4, R5, R3 ; Multiplies R5 with the bottom halfword of R3,
; extracts top 32 bits and writes to R4.
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