Table 6-23 Data Alu Extended Precision Multiplication Instructions; Table 6-24 Data Alu Arithmetic Instructions - Motorola DSP56800 Manual

Table 6-22. Data ALU Multiply Instructions (Continued)
Operation
MPYR
Table 6-23. Data ALU Extended Precision Multiplication Instructions
Operation
MACSU
MPYSU
Operation
ABS
ADC
ADD
CLR
Operands
(±)Y1,X0,FDD
(±)Y0,X0,FDD
(±)Y1,Y0,FDD
(±)Y0,Y0,FDD
(±)A1,Y0,FDD
(±)B1,Y1,FDD
Operands
X0,Y1,FDD
X0,Y0,FDD
Y0,Y1,FDD
Y0,Y0,FDD
Y0,A1,FDD
Y1,B1,FDD
X0,Y1,FDD
X0,Y0,FDD
Y0,Y1,FDD
Y0,Y0,FDD
Y0,A1,FDD
Y1,B1,FDD
Table 6-24. Data ALU Arithmetic Instructions
Operands C
F 2
Y,F 2
DD,FDD 2
F1,DD
~F,F
Y,F
X:(SP-xx),FDD 6
X:aa,FDD 4
X:xxxx,FDD 6
FDD,X:(SP-xx) 8
FDD,X:xxxx 8
FDD,X:aa 6
#xx,FDD 4
#xxxx,FDD 6
F 2
F1DD 2
Rj
N
Instruction Set Introduction
DSP56800 Instruction Set Summary
C W
2 1 Fractional multiply where one operand is
optionally negated before multiplication. Result
is rounded
Note: Assembler also accepts first two oper-
ands when they are specified in opposite order
C W
2 1 Signed or unsigned 16x16 fractional MAC with
32-bit result.
The first operand is treated as signed and the
second as unsigned.
2 1 Signed or unsigned 16x16 fractional multiply
with 32-bit result.
The first operand is treated as signed and the
second as unsigned.
W Comments
1 Absolute value.
1 Add with carry (sets C bit also).
1 36-bit addition of two registers.
1 Add memory word to register.
1
X:aa represents a 6-bit absolute address. Refer to
2
Absolute Short Address (Direct Addressing): <aa>
on page 4-22
2 Add register to memory word, storing the result back to
memory.
2
2
1 Add an immediate integer 0–31.
2 Add a signed 16-bit immediate.
1 Clear 36-bit accumulator and set condition codes.
1 Identical to move #0,<reg>; does not set condition
codes.
Comments
Comments
6-21