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2-10
M32R-FPU Software Manual (Rev.1.01)
ACC
063
sign 0
RAC instruction
ACC
063
sign 0
RACH instruction
< word size round off > < halfword size round off >
datadata
063063
Note: The actual operation is processed in two steps.
Refer to Chapter 3 for details.
Fig. 2.1.4 DSP function instruction operation 3 (transfer between accumulator and register)
Rdest
031
ACC
063
15 16 31 32
47 48
MVFACHI
instruction
Rsrc
031
ACC
063
31 32
MVFACLO
instruction
MVFACMI instruction
MVTACLO
instruction
MVTACHI
instruction
Fig. 2.1.3 DSP function instruction operation 2 (round off)
INSTRUCTION SET
2.1 Instruction set overview