SMPY Multiply Signed 16 LSB x Signed 16 LSB With Left Shift and Saturation
3-220 Instruction Set SPRU733
Example SMPY .M1 A1,A2,A3
Before instruction 2 cycle after instruction
A1
0000 0123h
291
‡
A1 0000 0123h
A2 01E0 FA81h −1407
‡
A2 01E0 FA81h
A3 xxxx xxxxh A3 FFF3 8146h −818874
CSR 0001 0100h CSR 0001 0100h Not saturated
‡
Signed 16-LSB integer
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