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2
2.1.5 EIT-related instructions
The EIT-related instructions carry out the EIT events (Exception, Interrupt and Trap).
Trap initiation and return from EIT are EIT-related instructions.
TRAP
RTE
2.1.6 DSP function instructions
The DSP function instructions carry out multiplication of 32 bits x 16 bits and 16 bits x 16
bits or multiply and add operation; there are also instructions to round off data in the
accumulator and carry out transfer of data between the accumulator and a general-
purpose register.
MACHI
MACLO
MACWHI
MACWLO
MULHI
MULLO
MULWHI
MULWLO
MVFACHI
MVFACLO
MVFACMI
MVTACHI
MVTACLO
RAC
RACH
Trap
Return from EIT
Multiply-accumulate high-order halfwords
Multiply-accumulate low-order halfwords
Multiply-accumulate word and high-order halfword
Multiply-accumulate word and low-order halfword
Multiply high-order halfwords
Multiply low-order halfwords
Multiply word and high-order halfword
Multiply word and low-order halfword
Move high-order word from accumulator
Move low-order word from accumulator
Move middle-order word from accumulator
Move high-order word to accumulator
Move low-order word to accumulator
Round accumulator
Round accumulator halfword
2-8
INSTRUCTION SET
2.1 Instruction set overview
M32R-FPU Software Manual (Rev.1.01)
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