Cirrus Logic EP93xx - Manual (Page 116)

3-46 DS785UM1
Copyright 2007 Cirrus Logic
MaverickCrunch Co-Processor
EP93xx User’s Guide
3
3
3
32-bit Integer Multiply-Subtract, Result to Accumulator
Description:
Multiplies two 32-bit integers, subtracts the product from a third 32-bit integer,
and stores the result in an accumulator:
CRa = CRd - (CRn
×
CRm)
Mnemonic:
CFMSUB32 CRa, CRd, CRn, CRm
Bit Definitions:
CRa: Destination accumulator
CRd: Minuend register
CRn: Multiplicand register
CRm: Multiplicand register
32-bit Integer Multiply-Add to Accumulator
Description:
Multiplies two 32-bit integers, adds the product to an accumulator, and stores
the result in an accumulator:
CRa = CRd + (CRn
×
CRm)
Mnemonic:
CFMADDA32 CRa, CRd, CRn, CRm
Bit Definitions:
CRa: Destination accumulator
CRd: Addend accumulator
CRn: Multiplicand register
CRm: Multiplicand register
31:28 27:24 23:22 21:20 19:16 15:12 11:8 7:5 4 3:0
cond 1 1 1 0 0 0 0 1 CRn CRd 0 1 1 0 CRa 0 CRm
31:28 27:24 23:22 21:20 19:16 15:12 11:8 7:5 4 3:0
cond 1 1 1 0 0 0 1 0 CRn CRd 0 1 1 0 CRa 0 CRm