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M32R-FPU Software Manual (Rev.1.01)
(1)
Table of contents
CHAPTER 1 CPU PROGRAMMING MODEL
1.1 CPU register .......................................................................................................... 1-2
1.2 General-purpose registers ...................................................................................... 1-2
1.3 Control registers ..................................................................................................... 1-3
1.3.1 Processor status word register: PSW (CR0) ...................................... 1-4
1.3.2 Condition bit register: CBR (CR1) ...................................................... 1-5
1.3.3 Interrupt stack pointer: SPI (CR2)
User stack pointer: SPU (CR3) .......................................................... 1-5
1.3.4 Backup PC: BPC (CR6) ..................................................................... 1-5
1.3.5 Floating-Point Status Register: FPSR (CR7) ..................................... 1-6
1.3.6 Floating-Point Exceptions (FPE) ........................................................ 1-8
1.4 Accumulator ............................................................................................................ 1-11
1.5 Program counter ..................................................................................................... 1-11
1.6 Data format ............................................................................................................. 1-12
1.6.1 Data type ............................................................................................ 1-12
1.6.2 Data format.........................................................................................1-13
1.7 Addressing mode .................................................................................................... 1-15
CHAPTER 2 INSTRUCTION SET
2.1 Instruction set overview ......................................................................................... 2-2
2.1.1 Load/store instructions ....................................................................... 2-2
2.1.2 Transfer instructions ........................................................................... 2-4
2.1.3 Operation instructions ........................................................................ 2-4
2.1.4 Branch instructions ............................................................................. 2-6
2.1.5 EIT-related instructions ...................................................................... 2-8
2.1.6 DSP function instructions ................................................................... 2-8
2.1.7 Floating-point Instructions .................................................................. 2-11
2.1.8 Bit Operation Instructions ................................................................... 2-11
2.2 Instruction format ................................................................................................... 2-12