HD6417641 RENESAS [Renesas Technology Corp], HD6417641 Datasheet - Page 172
HD6417641
Manufacturer Part Number
HD6417641
Description
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RENESAS [Renesas Technology Corp]
Datasheet
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Section 3 DSP Operation
3.1.10
The DSP unit of this LSI provides additional two independent registers, MACL and MACH, in
order to support SH's standard multiply/MAC operations. They can be also used as temporary
storage registers by local data move instructions between MACH/L and other DSP registers Figure
3.17 shows the flow of seven local data move instructions. Table 3.13 shows the variation of this
type of instruction.
Table 3.13 Variation of Local Data Move Operations
This instruction is very similar to other transfer instructions. If either the A0 or A1 register is
specified as the destination operand of PSTS, the signed bit is sign-extended and copied into the
corresponding guard-bit parts, A0G or A1G. The DC bit in DSR and other condition code bits are
not updated regardless of the instruction result. This instruction can operate with MOVX and
MOVY in parallel.
Rev. 4.00 Sep. 14, 2005 Page 122 of 982
REJ09B0023-0400
Mnemonic
PLDS
PSTS
Local Data Move Instruction
Function
Data move from DSP register to MACL/MACH
Data move from MACL/MACH to DSP register
Cannot be used
Figure 3.17 Local Data Move Instruction Flow
PSTS
X0
X1
A0
A1
MACH
MACL
A0G
M0
M1
Y0
Y1
PLDS
A1G
Operand
Dz
Dz
DSR
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