HD6417660 RENESAS [Renesas Technology Corp], HD6417660 Datasheet - Page 176

• Manufacturer Part Number: HD6417660
• Description: Renesas 32-Bit RISC Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

3.5.13
When an identical destination operand is specified with multiple parallel instructions, data conflict
occurs. Table 3.34 shows the correspondence between each operand and registers.
Table 3.34 Correspondence between Operands and Registers
Notes: 1. Registers available for operands
There are three cases of operand conflict problems.
• When ALU and multiply instructions specify the same destination operand (Du and Dg)
• When X-memory load and ALU instructions specify the same destination operand (Dx and Du,
• When Y-memory load and ALU instructions specify the same destination operand (Dy and Du,
In these cases above, the result is not guaranteed.
Rev. 1.00, 02/04, page 138 of 804
DSP
Registers
or Dz)
or Dz)
2. Registers available for operands (when there is operand conflict)
Operand Conflict
A0
A1
M0
M1
X0
X1
Y0
Y1
Ax
Instructions
X-Memory
Load
Ix
Dx
*
*
2
2
Ay
Instructions
Y-Memory
Load
Iy
Dy
*
*
2
2
Sx
*
*
*
*
6-Operand ALU
1
1
1
1
Instructions
Sy
*
*
*
*
1
1
1
1
Du
*
*
*
*
2
2
2
2
Se
*
*
*
*
1
1
1
1
Instructions
3-Operand
Multiply
Sf
*
*
*
*
1
1
1
1
Dg
*
*
*
*
2
2
1
1
Sx
*
*
*
*
3-Operand ALU
1
1
1
1
Instructions
Sy
*
*
*
*
1
1
1
1
Dz
*
*
*
*
*
*
*
*
1
1
1
1
2
2
2
2