SMJ320C80_15 Datasheet, PDF (19/158 Pages) Texas Instruments – DIGITAL SIGNAL PROCESSOR

SMJ320C80
DIGITAL SIGNAL PROCESSOR
MP general-purpose registers (continued)
Zero/Discard
R1
R2
R3
R4
R5
•
•
•
R30
R31
32-Bit Registers
SGUS025B -- AUGUST 1998 -- REVISED JUNE 2002
Not Available
R2, R3
R4, R5
•
•
•
R30, R31
64-Bit Register Pairs
Figure 4. MP General-Purpose Registers
The 32-bit registers can contain signed-integer, unsigned-integer, or single-precision floating-point values.
Signed and unsigned bytes and halfwords are sign-extended or zero-filled. Doublewords can be stored in a
64-bit even/odd register pair. Double-precision floating-point values are referenced using the even register
number or the register pair. Figure 5 through Figure 7 show the register data formats.
31
22
0
Single-Precision
Floating Point
S
E
E
E
E
E
E
E
E
MMMMMMMMMMMMMMMMMMMMMMM
MS
LS
Signed 32-bit
Integer
31
0
SI I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I
MS
LS
Unsigned 32-Bit
Integer
31
0
UUUUUUUUUUUUUUUUUUUUUUUUUUUUUUUU
MS
LS
S Sign bit
E Exponent
M Value
I Signed integer value
U Unsigned integer value
MS Most significant
LS Least signficant
Figure 5. MP Register 32-Bit Data Formats
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