ARM VERSION 1.2 - Manual (Page 157)

ARM Instruction Reference
ARM DUI 0068B Copyright © 2000, 2001 ARM Limited. All rights reserved. 4-47
Architectures
This instruction is available in all E variants of ARM architecture v5 and above.
Examples
SMLATT r8,r1,r0,r8
SMLABBNE r0,r2,r1,r10
SMLABT r0,r0,r3,r5
Incorrect examples
SMLATB r0,r7,r8,r15 ; use of r15 not allowed
SMLATTS r0,r6,r2 ; use of S suffix not allowed