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Inline Assembly Language and Intrinsics
Intrinsic Functions
176
Targeting MC56F83xx/DSP5685x Controllers
Assumptions
OMR’s SA bit was set to 1 at least 3 cycles before this code, that is, saturation on data
ALU results enabled.
Prototype
Word32 L_shr(Word32 lval2shft, Word16 s_shftamount)
Example
long result, l = 0x24680000;
short s2= 1;
result = L_shrtNs(l,s2);
// Expected value of result: 0x12340000
L_shr_r
Arithmetic shift of 32-bit value by a specified shift amount. If the shift count is
positive, a right shift is performed. Otherwise, a left shift is performed. If a right shift
is performed, then rounding performed on result. Saturation may occur during a left
shift.
Assumptions
OMR's SA bit was set to 1 at least 3 cycles before this code, that is, saturation on data
ALU results enabled.
Prototype
Word32 L_shr_r(Word32 lval2shft, Word16 s_shftamount)
- Revised 2003/08/15 1
- How to Contact Metrowerks 2
- Table of Contents 3
- 6 C for DSP56800E 113 4
- 8 Debugging for DSP56800E 189 5
- A Porting Issues 353 7
- Introduction 10
- CodeWarrior IDE 10
- References 11
- Getting Started 13
- Creating a Project 15
- Project Wizard 16
- Finish dialog box (Figure 19
- 2.4) appears 19
- Stationery 21
- Development Studio 29
- Overview 29
- Development Process 30
- Manage Files (1) 31
- Project Files 32
- Editing Code 33
- Development Studio Overview 34
- Debugging 36
- Target Settings 37
- Changing Target Settings 39
- XML Files 41
- Restoring Target Settings 41
- C/C++ Language 45
- Element Purpose Comments 47
- C/C++ Preprocessor 48
- Table 4.6 49
- C/C++ Warnings 50
- M56800E Assembler 54
- M56800E Processor 56
- ELF Disassembler 59
- M56800E Linker 61
- Remote Debugging 66
- M56800E Target (Debugging) 67
- Remote Debug Options 71
- Processor Expert Overview 76
- Processor Expert Beans 78
- Processor Expert Menu 79
- Item Subitem Action 80
- Processor Expert Windows 83
- Bean Inspector 84
- Target CPU Window 86
- Memory Map Window 91
- CPU Types Overview 92
- Resource Meter 93
- Installed Beans Overview 94
- Peripherals Usage Inspector 95
- Processor Expert Interface 100
- Processor Expert Tutorial 100
- IRQA and 101
- GPIO_C0. The 101
- Listing 5.1 File Events.c 105
- C for DSP56800E 113
- Type Option Setting Size 114
- Passing Values to Functions 115
- Stack Frame and Alignment 119
- User Stack Allocation 120
- , b, or c may not be correct 123
- Data Alignment Requirements 125
- Word and Byte Pointers 126
- Code and Data Storage 127
- Large Data Model Support 129
- Optimizing Code 132
- Deadstripping and Link Order 133
- Deadstripping and Link Order 134
- Inline Assembly Language 135
- Inline Assembly Overview 136
- Assembly Language Quick Guide 137
- Language 140
- Intrinsic Functions 141
- Fractional Arithmetic 142
- Absolute/Negate 145
- L_negate 146
- Addition/Subtraction 147
- Deposit/Extract 153
- L_deposit_h 154
- L_deposit_l 154
- Division 155
- Multiplication/MAC 158
- L_mult_ls 163
- Normalization 164
- Rounding 167
- Shifting 168
- L_shlftNs 174
- L_shlfts 175
- L_shrtNs 177
- __mod_init 179
- __mod_initint16 180
- __mod_start 180
- __mod_access 181
- __mod_update 181
- __mod_stop 181
- __mod_getint16 182
- __mod_setint16 182
- Modulo Buffer Examples 183
- Points to Remember 185
- Modulo Addressing Error Codes 186
- Function Possible Error Code 187
- Code Meaning 187
- Debugging for DSP56800E 189
- Command Converter Server 190
- Converter Server 191
- Protocol to Parallel Port 191
- Protocol to PCI 194
- 1. Click the Add button 195
- Load/Save Memory 197
- History Combo Box 198
- Radio Buttons 199
- Memory Type Combo Box 199
- Address Text Field 199
- Size Text Field 199
- Dialog Box Controls 199
- Fill Memory 200
- Fill Expression Text Field 201
- Save/Restore Registers 202
- Register Group List 203
- EOnCE Debugger Features 204
- Special Counters 205
- Trace Buffer 207
- Set Trigger Panel 209
- Using the DSP56800E Simulator 211
- Cycle/Instruction Count 212
- Memory Map 213
- Setting Breakpoints 217
- Setting Watchpoints 218
- Register Details Window 220
- Viewing X: Memory 221
- Viewing P: Memory 223
- • Mixed (Figure 8.26 225
- Command-Line Debugging 227
- Command-Line Debugging Tasks 229
- View Debugging Command Hints 230
- Stop an Executing Script 231
- [func_name 233
- [ -rd 252
- [ id_num 252
- [ address filename 255
- [re]start 258
- System-Level Connect 264
- Debugging in the Flash Memory 265
- M56800E Target 268
- High-Speed Simultaneous 269
- Transfer 269
- Host-Side Client Interface 270
- HSST Host Program Example 276
- Target Library Interface 278
- HSST_setvbuf 279
- HSST_write 280
- HSST_read 281
- HSST_flush 282
- HSST_size 282
- HSST_raw_read 283
- HSST_raw_write 283
- HSST_set_log_dir 284
- HSST Target Program Example 285
- Figure 9.1 Restart HSST 286
- ELF Linker and Command 287
- Memory Segment 288
- Closure Blocks 288
- Sections Segment 289
- Linker Command File Syntax 290
- Arithmetic Operations 291
- Comments 291
- Deadstrip Prevention 292
- Expressions and Assignments 293
- Integral Types 293
- File Selection 294
- Function Selection 294
- ROM to RAM Copying 295
- Stack and Heap 297
- (location counter) 298
- ALIGNALL 300
- FORCE_ACTIVE 301
- KEEP_SECTION 302
- REF_INCLUDE 304
- SECTIONS 304
- WRITEB (expression); 307
- WRITEH (expression); 307
- WRITEW (expression); 308
- Response File 309
- Sample Build Script 310
- Arguments 310
- DSP56800E Command-Line Tools 311
- Compiler 312
- Assembler 323
- Libraries and Runtime 325
- Console and File I/O 326
- Host File Location 327
- DSP56800E 328
- Runtime Initialization 329
- Libraries and Runtime Code 331
- EOnCE Library 332
- _eonce_Initialize 334
- _eonce_SetTrigger 335
- _eonce_SetCounterTrigger 336
- _eonce_ClearTrigger 337
- _eonce_GetCounters 338
- _eonce_GetCounterStatus 338
- _eonce_SetupTraceBuffer 339
- _eonce_GetTraceBuffer 340
- _eonce_ClearTraceBuffer 340
- _eonce_StartTraceBuffer 341
- _eonce_HaltTraceBuffer 341
- _eonce_EnableDEBUGEV 342
- _eonce_EnableLimitTrigger 342
- Definitions 343
- Return Codes 344
- Normal Trigger Modes 344
- Counter Trigger Modes 346
- Data Selection Modes 347
- Counter Function Modes 348
- Normal Unit Action Options 348
- Counter Unit Action Options 349
- Accumulating Trigger Options 349
- Miscellaneous Trigger Options 350
- Trace Buffer Capture Options 351
- Trace Buffer Full Options 352
- Porting Issues 353
- DSP56800x New Project 355
- Stationery Wizard 355
- • Resulting Target Rules 356
- • Rule Notes 356
- Page Rules 357
- Resulting Target Rules 359
- Rule Notes 360
- New Project Dialog Box 362
- Target Pages 363
- Expert Option Page 366
- Expert Page 368
- “Page Rules.” 368
- Data Memory Model Page 369
- External/Internal Memory Page 370
- Finish Page 371
- Pragmas for the DSP56800 373
- Pragma Scope 374
- Pragma Reference 375
- ANSI_strict 376
- <istring> 382
- Optional Arguments: 382
- <ustring> 382
- <accmode> 382
- *str2 = 'Y'; 384
- #pragma inline_depth(n) 390
- #pragma inline_depth(smart) 390
- #pragma inline_max_size(n); 390
- Interrupt 396
- #pragma mark itemName 397
- #pragma mark 397
- #pragma mpwc_relax on 399
- #pragma notonce 400
- #pragma once [ on ] 400
- [...data..] 410
- #include "file" 419
- #include <file> 420
- Illegal Pragmas 432
- Checking Settings 432
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