dsp56800 Freescale Semiconductor, Inc, dsp56800 Datasheet - Page 355

• Manufacturer Part Number: dsp56800
• Description: 16-bit Digital Signal Controllers
• Manufacturer: Freescale Semiconductor, Inc

MPYR
Condition Codes Affected:
Instruction Fields:
Freescale Semiconductor
Operation
MPYR
See Section 3.6.5, “16-Bit Destinations,” on page 3-35 for cases with X0, Y0, or Y1 as D.
See Section 3.6.2, “36-Bit Destinations — CC Bit Set,” on page 3-34 and Section 3.6.4, “20-Bit Des-
tinations — CC Bit Set,” on page 3-34 for the case when the CC bit is set.
15
LF
14
*
SZ — Set according to the standard definition of the SZ bit (parallel move)
L
E
U
N
Z
V
(±)Y1,X0,FDD
(±)Y0,X0,FDD
(±)Y1,Y0,FDD
(±)Y0,Y0,FDD
(±)A1,Y0,FDD
(±)B1,Y1,FDD
13
*
Operands
— Set if limiting (parallel move) or overflow has occurred in result
— Set if the extension portion of accumulator result is in use
— Set according to the standard definition of the U bit
— Set if MSB of result is set
— Set if result equals zero
— Always cleared
12
*
MR
Signed Multiply and Round
11
*
10
*
Instruction Set Details
I1
9
C
2
I0
8
W
1
SZ
7
Fractional multiply where one operand is optionally
negated before multiplication; result is rounded
Note: Assembler also accepts first two operands when
they are specified in opposite order
L
6
E
5
U
4
CCR
N
3
Z
Comments
2
V
1
0
C
MPYR
A-125