Texas Instruments TMS320C3x 사용자 설명서
MPYF3
Multiply Floating-Point Value, 3-Operand
13-148
Example 1
MPYF3 R0,R7,R1
Before Instruction
After Instruction
R0
05 7B40 0000
R0
05 7B40 0000
R1
00 0000 0000
R1
0D 306A 3000
R7
07 33C0 0000
R7
07 33C0 0000
LUF
0
LUF
0
LV
0
LV
0
UF
0
UF
0
N
0
N
0
Z
0
Z
0
V
0
V
0
C
0
C
0
1.79750e+02
6.281250e+01
1.12905469e+04
6.281250e+01
1.79750e+02
Example 2
MPYF3 *+AR2(IR0),R7,R2
or
MPYF3 R7,*+AR2(IR0),R2
Before Instruction
After Instruction
R2
00 0000 0000
R2
0D 09E4 A000
R7
05 7B40 0000
R7
05 7B40 0000
AR2
80 9800
AR2
80 9800
IR0
12A
IR0
12A
LUF
0
LUF
0
LV
0
LV
0
UF
0
UF
0
N
0
N
0
Z
0
Z
0
V
0
V
0
C
0
C
0
Data memory
80992Ah
70C8000
80992Ah
70C8000
8.82515625e+03
6.281250e+01
1.4050e+02
6.281250e+01
1.4050e+02
Note:
Cycle Count
See Section 8.5.2,
Data Loads and Stores, on page 8-24 for the effects of
operand ordering on the cycle count.