HD6417320 RENESAS [Renesas Technology Corp], HD6417320 Datasheet - Page 210

• Manufacturer Part Number: HD6417320
• Description: Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 3 DSP Operating Unit
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 operation and multiply instructions specify the same destination operand (Du and
• When X-memory load and ALU operation specify the same destination operand (Dx and Du,
• When Y-memory load and ALU operation specify the same destination operand (Dy and Du,
In these cases above, the result is not guaranteed.
Rev. 3.00 Jan. 18, 2008 Page 148 of 1458
REJ09B0033-0300
DSP
Registers
Dg)
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
X-Memory
Load
Ix
Dx
*
*
2
2
Ay
Y-Memory
Load
Iy
Dy
*
*
2
2
Sx
*
*
*
*
1
1
1
1
6-Instruction
ALU
Sy
*
*
*
*
1
1
1
1
*
*
*
*
Du
2
2
2
2
Se
*
*
*
*
1
1
1
1
3-Instruction
Multiply
Sf
*
*
*
*
1
1
1
1
Dg
*
*
*
*
2
2
1
1
Sx
*
*
*
*
3-Instruction
1
1
1
1
Sy
*
*
*
*
ALU
1
1
1
1
Dz
*
*
*
*
*
*
*
*
1
1
1
1
2
2
2
2