Cirrus Logic EP93xx - Manual (Page 115)

DS785UM1 3-45
Copyright 2007 Cirrus Logic
MaverickCrunch Co-Processor
EP93xx User’s Guide
3
3
3
Bit Definitions:
CRd: Destination/addend register
CRn: Multiplicand register
CRm: Multiplicand register
32-bit Integer Multiply-Subtract
Description:
Multiplies two 32-bit integers and subtracts the result from another 32-bit
integer:
CRd = CRd - (CRn
×
CRm)
Mnemonic:
CFMSC32 CRd, CRn, CRm
Bit Definitions:
CRd: Destination/minuend register
CRn: Multiplicand register
CRm: Multiplicand register
3.5.9 Accumulator Arithmetic Instructions
32-bit Integer Multiply-Add, Result to Accumulator
Description:
Multiplies two 32-bit integers, adds the product to a third 32-bit integer, and
stores the result in an accumulator:
CRa = CRd + (CRn
×
CRm)
Mnemonic:
CFMADD32 CRa, CRd, CRn, CRm
Bit Definitions:
CRa: Destination accumulator
CRd: Addend register
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 0 1 0 1 1 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 0 0 CRn CRd 0 1 1 0 CRa 0 CRm