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2-8

M32R-FPU Software Manual (Rev.1.01)

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 Trap

RTE Return from EIT

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 Multiply-accumulate high-order halfwords

MACLO Multiply-accumulate low-order halfwords

MACWHI Multiply-accumulate word and high-order halfword

MACWLO Multiply-accumulate word and low-order halfword

MULHI Multiply high-order halfwords

MULLO Multiply low-order halfwords

MULWHI Multiply word and high-order halfword

MULWLO Multiply word and low-order halfword

MVFACHI Move high-order word from accumulator

MVFACLO Move low-order word from accumulator

MVFACMI Move middle-order word from accumulator

MVTACHI Move high-order word to accumulator

MVTACLO Move low-order word to accumulator

RAC Round accumulator

RACH Round accumulator halfword

INSTRUCTION SET

2.1 Instruction set overview

1 2 ... 27 28 29 30 31 32 33 34 35 36 37 ... 193 194

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