HD6417750 Datasheet, PDF (26/1039 Pages) Renesas Technology Corp – SuperH RISC engine

Section 6 Floating-Point Unit ........................................................................................ 161
6.1 Overview ........................................................................................................................... 161
6.2 Data Formats ..................................................................................................................... 161
6.2.1 Floating-Point Format .......................................................................................... 161
6.2.2 Non-Numbers (NaN)............................................................................................ 163
6.2.3 Denormalized Numbers........................................................................................ 164
6.3 Registers ............................................................................................................................ 165
6.3.1 Floating-Point Registers ....................................................................................... 165
6.3.2 Floating-Point Status/Control Register (FPSCR) ................................................. 167
6.3.3 Floating-Point Communication Register (FPUL)................................................. 168
6.4 Rounding ........................................................................................................................... 168
6.5 Floating-Point Exceptions ................................................................................................. 169
6.6 Graphics Support Functions .............................................................................................. 170
6.6.1 Geometric Operation Instructions ........................................................................ 170
6.6.2 Pair Single-Precision Data Transfer ..................................................................... 172
Section 7 Instruction Set.................................................................................................. 173
7.1 Execution Environment..................................................................................................... 173
7.2 Addressing Modes............................................................................................................. 175
7.3 Instruction Set ................................................................................................................... 179
Section 8 Pipelining .......................................................................................................... 193
8.1 Pipelines ............................................................................................................................ 193
8.2 Parallel-Executability ........................................................................................................ 200
8.3 Execution Cycles and Pipeline Stalling............................................................................. 204
Section 9 Power-Down Modes ...................................................................................... 221
9.1 Overview ........................................................................................................................... 221
9.1.1 Types of Power-Down Modes.............................................................................. 221
9.1.2 Register Configuration ......................................................................................... 223
9.1.3 Pin Configuration ................................................................................................. 223
9.2 Register Descriptions ........................................................................................................ 224
9.2.1 Standby Control Register (STBCR) ..................................................................... 224
9.2.2 Peripheral Module Pin High Impedance Control ................................................. 226
9.2.3 Peripheral Module Pin Pull-Up Control ............................................................... 226
9.2.4 Standby Control Register 2 (STBCR2) ................................................................ 227
9.2.5 Clock-Stop Register 00 (CLKSTP00) (SH7750R Only)...................................... 228
9.2.6 Clock-Stop Clear Register 00 (CLKSTPCLR00) (SH7750R Only) .................... 229
9.3 Sleep Mode........................................................................................................................ 230
9.3.1 Transition to Sleep Mode ..................................................................................... 230
9.3.2 Exit from Sleep Mode .......................................................................................... 230
9.4 Deep Sleep Mode .............................................................................................................. 230
9.4.1 Transition to Deep Sleep Mode............................................................................ 230
Rev. 6.0, 07/02, page xxiv of I