iv Microcode Programmer’s Reference Manual
Intel
®
IXP1200 Network Processor Family
2.5.13 Structured Assembly .............................................................................. 41
2.5.13.1 Conditional Expressions...........................................................43
2.5.14 Subroutine Definition.............................................................................. 45
2.5.15 Token Replacement ...............................................................................45
2.5.16 Transfer Order........................................................................................47
2.5.17 Segment.................................................................................................47
2.5.18 Virtual Set...............................................................................................48
2.6 Preprocessor Details...........................................................................................48
2.6.1 Reserved Symbols .................................................................................48
2.6.2 Command Line Arguments ....................................................................48
2.6.3 Constant Expressions ............................................................................49
2.6.4 Preprocessor Operation .........................................................................51
2.6.5 Miscellaneous ........................................................................................52
2.6.6 Syntax for Argument and Token Lists .................................................... 52
2.6.7 Environment Variables ...........................................................................53
2.6.8 Predefined Symbols ...............................................................................53
2.6.9 Predefined Import Variables...................................................................53
2.7 Preprocessor Techniques ...................................................................................54
2.7.1 Branching into a Macro ..........................................................................54
2.7.2 Constructing Names from Numbers....................................................... 55
2.7.3 Writing Version Specific Code................................................................56
2.8 Distinguishing Preprocessor and Assembler Directives......................................57
3 Instruction Set ..................................................................................................................59
3.1 ALU .....................................................................................................................61
3.2 ALU_SHF ............................................................................................................ 63
3.3 BR .......................................................................................................................65
3.4 BR<0, BR=0, BR<=0, BR!=0, BR=COUT, BR>0 BR!=COUT, BR>=0................ 66
3.5 BR_BCLR, BR_BSET .........................................................................................67
3.6 BR=BYTE, BR!=BYTE ........................................................................................68
3.7 BR=CTX, BR!=CTX.............................................................................................69
3.8 BR_INP_STATE..................................................................................................70
3.9 BR_!SIGNAL.......................................................................................................71
3.10 CSR.....................................................................................................................72
3.11 CTX_ARB............................................................................................................74
3.12 DBL_SHF ............................................................................................................75
3.13 FAST_WR ...........................................................................................................76
3.14 FIND_BSET, FIND_BSET_WITH_MASK ...........................................................78
3.15 HASH1_48, HASH2_48, HASH3_48 ..................................................................81
3.16 HASH1_64, HASH2_64, HASH3_64 ..................................................................83
3.17 IMMED ................................................................................................................84
3.18 IMMED_B0, IMMED_B1, IMMED_B2, IMMED_B3.............................................85
3.19 IMMED_W0, IMMED_W1 ...................................................................................86
3.20 JUMP ..................................................................................................................87
3.21 LD_FIELD, LD_FIELD_W_CLR .......................................................................... 89
3.22 LOAD_ADDR ......................................................................................................90
3.23 LOAD_BSET_RESULT1, LOAD_BSET_RESULT2 ...........................................91
3.24 LOCAL_CSR_RD................................................................................................ 92
3.25 LOCAL_CSR_WR............................................................................................... 93
3.26 NOP ....................................................................................................................95
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