MN1030 Просмотр технического описания (PDF) - Unspecified

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MN1030

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Chapter 3 Usage Notes

Notes to Programmers .................................................................................................. 102

1 Pipeline Architencture .................................................................................................. 103

1.1 Pipeline Operation ............................................................................................. 103

1.2 Register to Register (RR) Operations ............................................................... 104

1.3 Data Load Operations ....................................................................................... 104

1.4 Data Store Operations ....................................................................................... 105

1.5 Branching Operations........................................................................................ 105

1.6 Complex Instructions ........................................................................................ 106

1.7 Special Instructions ........................................................................................... 107

1.8 Pipeline Stall ..................................................................................................... 108

2 Dangerous Code Sequences ......................................................................................... 110

2.1 Load/Store Instructions ..................................................................................... 112

2.2 Instructions Writing to IE and IM Bits .............................................................. 113

2.3 Sequences Updating and Referencing PSW Flags ............................................ 114

2.4 Sequences Writing to and Referencing PSW Flags .......................................... 115

2.5 MUL/MULU after Write to A0 ......................................................................... 116

2.6 Displacements with CALLS and JSR(AM31 Only) ......................................... 117

2.7 User Defined Instructions after MOVM[regs],(SP) (AM31 Only) ................... 118

2.8 BSET and BCLR with Cachable External Memory.......................................... 119

3 Code Sequences to Avoid ............................................................................................. 120

3.1 Time-Critical Code ............................................................................................ 123

3.2 Load/Store Instructions ..................................................................................... 124

3.3 Instructions Following Branch and Other Instructions ..................................... 125

3.4 Instructions Following Load Instructions ......................................................... 128

3.5 Instructions Following DIV/DIVU with Zero Dividend ................................... 139

3.6 Instructions Preceding Loc ................................................................................ 143

3.7 Instructions Preceding SETLB .......................................................................... 146

3.8 Instructions Preceding RETF ............................................................................ 147

3.9 Instructions at CALL/CALLS Targets .............................................................. 151

4 Boiler Plate Code Sequences ........................................................................................ 153

4.1 Reset Routine .................................................................................................... 153

4.2 Interrupt Handlers ............................................................................................. 154

4.3 Function Called with CALL Only ..................................................................... 156

4.4 Function Called with Both CALL and CALLS ................................................ 157

Appendix

Instruction Sets ....................................................................................................... 160

Instruction map ....................................................................................................... 183

INDEX

Index ........................................................................................................................... 192

<TOC 4>

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