Conversion operations
Operation Function
CFW
CSW
CSD
DEF
DUF
DED
DUD
FDG
GFD
Form the 1’s complement of ACCU-1-L (16 bits)
Form the 2’s complement of ACCU-1-L (16 bits)
Form the 2’s complement of ACCU 1 (32 bits)
Convert a fixed point number (16 bits) from BCD to binary
Convert a fixed point number (16 bits) from binary to BCD
Convert a double word (32 bits) from BCD to binary
Convert a double word (32 bits) from binary to BCD
Convert a fixed point number (32 bits) to a floating point number (32 bits)
Convert a floating point number to a fixed point number (32 bits)
DEF
The value in ACCU-1-L (bits 0 to 15) is interpreted as a BCD number.
After the conversion, ACCU-1-L contains a 16-bit fixed point
number.
DUF
The value in ACCU-1-L (bits 0 to 15) is interpreted as a 16-bit fixed point
number. After the conversion, ACCU-1-L contains a BCD number.
15 14 0
S2
14
. . . . . . . . . . . . . . . 2
0
DUF ↓ DEF ↑
15
0
S S S S 10
2
10
1
10
0
S (sign): 0 = positive
1 = negative
Table 3-23 Conversion operations
Executive Operations
CPU 948 Programming Guide
C79000-G8576-C848-04
3 - 63
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