Cirrus Logic EP93xx User 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<cond> 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<cond> 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