1 /*-------------------------------------------------------------------------
3 pcode.h - post code generation
4 Written By - Scott Dattalo scott@dattalo.com
5 Ported to PIC16 By - Martin Dubuc m.dubuc@rogers.com
7 This program is free software; you can redistribute it and/or modify it
8 under the terms of the GNU General Public License as published by the
9 Free Software Foundation; either version 2, or (at your option) any
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21 -------------------------------------------------------------------------*/
29 The post code generation is an assembler optimizer. The assembly code
30 produced by all of the previous steps is fully functional. This step
31 will attempt to analyze the flow of the assembly code and agressively
32 optimize it. The peep hole optimizer attempts to do the same thing.
33 As you may recall, the peep hole optimizer replaces blocks of assembly
34 with more optimal blocks (e.g. removing redundant register loads).
35 However, the peep hole optimizer has to be somewhat conservative since
36 an assembly program has implicit state information that's unavailable
37 when only a few instructions are examined.
38 Consider this example:
44 The movf seems redundant since we know that the W register already
45 contains the same value of t1. So a peep hole optimizer is tempted to
46 remove the "movf". However, this is dangerous since the movf affects
47 the flags in the status register (specifically the Z flag) and subsequent
48 code may depend upon this. Look at these two examples:
52 movf t1,w ; Can't remove this movf
58 movf t1,w ; This movf can be removed
59 xorwf t2,w ; since xorwf will over write Z
69 /***********************************************************************
72 * The DFPRINTF macro will call fprintf if PCODE_DEBUG is defined.
73 * The macro is used like:
75 * DPRINTF(("%s #%d\n","test", 1));
77 * The double parenthesis (()) are necessary
79 ***********************************************************************/
83 #define DFPRINTF(args) (fprintf args)
85 #define DFPRINTF(args) ;
89 /***********************************************************************
90 * PIC status bits - this will move into device dependent headers
91 ***********************************************************************/
97 #define PIC_IRP_BIT 7 /* Indirect register page select */
99 /***********************************************************************
100 * PIC INTCON bits - this will move into device dependent headers
101 ***********************************************************************/
102 #define PIC_RBIF_BIT 0 /* Port B level has changed flag */
103 #define PIC_INTF_BIT 1 /* Port B bit 0 interrupt on edge flag */
104 #define PIC_T0IF_BIT 2 /* TMR0 has overflowed flag */
105 #define PIC_RBIE_BIT 3 /* Port B level has changed - Interrupt Enable */
106 #define PIC_INTE_BIT 4 /* Port B bit 0 interrupt on edge - Int Enable */
107 #define PIC_T0IE_BIT 5 /* TMR0 overflow Interrupt Enable */
108 #define PIC_PIE_BIT 6 /* Peripheral Interrupt Enable */
109 #define PIC_GIE_BIT 7 /* Global Interrupt Enable */
111 /***********************************************************************
112 * PIC bank definitions
113 ***********************************************************************/
114 #define PIC_BANK_FIRST 0
115 #define PIC_BANK_LAST 0xf
118 /***********************************************************************
120 ***********************************************************************/
126 /***********************************************************************
128 * PIC_OPTYPE - Operand types that are specific to the PIC architecture
130 * If a PIC assembly instruction has an operand then here is where we
131 * associate a type to it. For example,
135 * The movf has two operands: 'reg' and the W register. 'reg' is some
136 * arbitrary general purpose register, hence it has the type PO_GPR_REGISTER.
137 * The W register, which is the PIC's accumulator, has the type PO_W.
139 ***********************************************************************/
145 PO_NONE=0, // No operand e.g. NOP
146 PO_W, // The working register (as a destination)
147 PO_WREG, // The working register (as a file register)
148 PO_STATUS, // The 'STATUS' register
149 PO_BSR, // The 'BSR' register
150 PO_FSR0, // The "file select register" (in PIC18 family it's one
152 PO_INDF0, // The Indirect register
153 PO_INTCON, // Interrupt Control register
154 PO_GPR_REGISTER, // A general purpose register
155 PO_GPR_BIT, // A bit of a general purpose register
156 PO_GPR_TEMP, // A general purpose temporary register
157 PO_SFR_REGISTER, // A special function register (e.g. PORTA)
158 PO_PCL, // Program counter Low register
159 PO_PCLATH, // Program counter Latch high register
160 PO_PCLATU, // Program counter Latch upper register
161 PO_PRODL, // Product Register Low
162 PO_PRODH, // Product Register High
163 PO_LITERAL, // A constant
164 PO_REL_ADDR, // A relative address
165 PO_IMMEDIATE, // (8051 legacy)
166 PO_DIR, // Direct memory (8051 legacy)
167 PO_CRY, // bit memory (8051 legacy)
168 PO_BIT, // bit operand.
169 PO_STR, // (8051 legacy)
171 PO_WILD // Wild card operand in peep optimizer
175 /***********************************************************************
179 * This is not a list of the PIC's opcodes per se, but instead
180 * an enumeration of all of the different types of pic opcodes.
182 ***********************************************************************/
186 POC_WILD=-1, /* Wild card - used in the pCode peep hole optimizer
187 * to represent ANY pic opcode */
270 // POC_TRIS , // To be removed
271 POC_TBLRD, // patch 15
272 POC_TBLRD_POSTINC, //
273 POC_TBLRD_POSTDEC, //
276 POC_TBLWT_POSTINC, //
277 POC_TBLWT_POSTDEC, //
278 POC_TBLWT_PREINC, // patch 15
286 /***********************************************************************
287 * PC_TYPE - pCode Types
288 ***********************************************************************/
292 PC_COMMENT=0, /* pCode is a comment */
293 PC_INLINE, /* user's inline code */
294 PC_OPCODE, /* PORT dependent opcode */
295 PC_LABEL, /* assembly label */
296 PC_FLOW, /* flow analysis */
297 PC_FUNCTION, /* Function start or end */
298 PC_WILD, /* wildcard - an opcode place holder used
299 * in the pCode peep hole optimizer */
300 PC_CSOURCE, /* C-Source Line */
301 PC_ASMDIR, /* Assembler directive */
302 PC_BAD /* Mark the pCode object as being bad */
305 /************************************************/
306 /*************** Structures ********************/
307 /************************************************/
308 /* These are here as forward references - the
309 * full definition of these are below */
311 struct pCodeWildBlock;
312 struct pCodeRegLives;
314 /*************************************************
317 The first step in optimizing pCode is determining
318 the program flow. This information is stored in
319 single-linked lists in the for of 'from' and 'to'
320 objects with in a pcode. For example, most instructions
321 don't involve any branching. So their from branch
322 points to the pCode immediately preceding them and
323 their 'to' branch points to the pcode immediately
324 following them. A skip instruction is an example of
325 a pcode that has multiple (in this case two) elements
326 in the 'to' branch. A 'label' pcode is an where there
327 may be multiple 'from' branches.
328 *************************************************/
330 typedef struct pBranch
332 struct pCode *pc; // Next pCode in a branch
333 struct pBranch *next; /* If more than one branch
334 * the next one is here */
338 /*************************************************
341 pCode Operand structure.
342 For those assembly instructions that have arguments,
343 the pCode will have a pCodeOp in which the argument
344 can be stored. For example
348 'some_register' will be stored/referenced in a pCodeOp
350 *************************************************/
352 typedef struct pCodeOp
360 typedef struct pCodeOpBit
364 unsigned int inBitSpace: 1; /* True if in bit space, else
365 just a bit of a register */
368 typedef struct pCodeOpLit
374 typedef struct pCodeOpLit2
382 typedef struct pCodeOpImmd
385 int offset; /* low,high or upper byte of immediate value */
386 int index; /* add this to the immediate value */
387 unsigned _const:1; /* is in code space */
389 int rIdx; /* If this immd points to a register */
390 struct regs *r; /* then this is the reg. */
394 typedef struct pCodeOpLabel
400 typedef struct pCodeOpReg
402 pCodeOp pcop; // Can be either GPR or SFR
403 int rIdx; // Index into the register table
405 int instance; // byte # of Multi-byte registers
409 typedef struct pCodeOpReg2
411 pCodeOp pcop; // used by default to all references
414 int instance; // assume same instance for both operands
417 pCodeOp *pcop2; // second memory operand
420 typedef struct pCodeOpRegBit
422 pCodeOpReg pcor; // The Register containing this bit
423 int bit; // 0-7 bit number.
424 PIC_OPTYPE subtype; // The type of this register.
425 unsigned int inBitSpace: 1; /* True if in bit space, else
426 just a bit of a register */
430 typedef struct pCodeOpWild
434 struct pCodeWildBlock *pcwb;
436 int id; /* index into an array of char *'s that will match
437 * the wild card. The array is in *pcp. */
438 pCodeOp *subtype; /* Pointer to the Operand type into which this wild
439 * card will be expanded */
440 pCodeOp *matched; /* When a wild matches, we'll store a pointer to the
441 * opcode we matched */
443 pCodeOp *pcop2; /* second operand if exists */
448 /*************************************************
451 Here is the basic build block of a PIC instruction.
452 Each pic instruction will get allocated a pCode.
453 A linked list of pCodes makes a program.
455 **************************************************/
461 struct pCode *prev; // The pCode objects are linked together
462 struct pCode *next; // in doubly linked lists.
464 int seq; // sequence number
466 struct pBlock *pb; // The pBlock that contains this pCode.
468 /* "virtual functions"
469 * The pCode structure is like a base class
470 * in C++. The subsequent structures that "inherit"
471 * the pCode structure will initialize these function
472 * pointers to something useful */
473 // void (*analyze) (struct pCode *_this);
474 void (*destruct)(struct pCode *_this);
475 void (*print) (FILE *of,struct pCode *_this);
480 /*************************************************
482 **************************************************/
484 typedef struct pCodeComment
494 /*************************************************
496 **************************************************/
498 typedef struct pCodeCSource
510 /*************************************************
512 **************************************************/
514 /*************************************************
517 The Flow object is used as marker to separate
518 the assembly code into contiguous chunks. In other
519 words, everytime an instruction cause or potentially
520 causes a branch, a Flow object will be inserted into
521 the pCode chain to mark the beginning of the next
524 **************************************************/
526 typedef struct pCodeFlow
531 pCode *end; /* Last pCode in this flow. Note that
532 the first pCode is pc.next */
534 /* set **uses; * map the pCode instruction inCond and outCond conditions
535 * in this array of set's. The reason we allocate an
536 * array of pointers instead of declaring each type of
537 * usage is because there are port dependent usage definitions */
538 //int nuses; /* number of uses sets */
540 set *from; /* flow blocks that can send control to this flow block */
541 set *to; /* flow blocks to which this one can send control */
542 struct pCodeFlow *ancestor; /* The most immediate "single" pCodeFlow object that
543 * executes prior to this one. In many cases, this
544 * will be just the previous */
546 int inCond; /* Input conditions - stuff assumed defined at entry */
547 int outCond; /* Output conditions - stuff modified by flow block */
549 int firstBank; /* The first and last bank flags are the first and last */
550 int lastBank; /* register banks used within one flow object */
555 set *registers;/* Registers used in this flow */
559 /*************************************************
562 The Flow Link object is used to record information
563 about how consecutive excutive Flow objects are related.
564 The pCodeFlow objects demarcate the pCodeInstructions
565 into contiguous chunks. The FlowLink records conflicts
566 in the discontinuities. For example, if one Flow object
567 references a register in bank 0 and the next Flow object
568 references a register in bank 1, then there is a discontinuity
569 in the banking registers.
572 typedef struct pCodeFlowLink
574 pCodeFlow *pcflow; /* pointer to linked pCodeFlow object */
576 int bank_conflict; /* records bank conflicts */
580 /*************************************************
583 Here we describe all the facets of a PIC instruction
584 (expansion for the 18cxxx is also provided).
586 **************************************************/
588 typedef struct pCodeInstruction
593 PIC_OPCODE op; // The opcode of the instruction.
595 char const * const mnemonic; // Pointer to mnemonic string
597 pBranch *from; // pCodes that execute before this one
598 pBranch *to; // pCodes that execute after
599 pBranch *label; // pCode instructions that have labels
601 pCodeOp *pcop; /* Operand, if this instruction has one */
602 pCodeFlow *pcflow; /* flow block to which this instruction belongs */
603 pCodeCSource *cline; /* C Source from which this instruction was derived */
605 unsigned int num_ops; /* Number of operands (0,1,2 for mid range pics) */
606 unsigned int isModReg: 1; /* If destination is W or F, then 1==F */
607 unsigned int isBitInst: 1; /* e.g. BCF */
608 unsigned int isBranch: 1; /* True if this is a branching instruction */
609 unsigned int isSkip: 1; /* True if this is a skip instruction */
610 unsigned int isLit: 1; /* True if this instruction has an literal operand */
611 unsigned int isAccess: 1; /* True if this instruction has an access RAM operand */
612 unsigned int isFastCall: 1; /* True if this instruction has a fast call/return mode select operand */
613 unsigned int is2MemOp: 1; /* True is second operand is a memory operand VR - support for MOVFF */
614 unsigned int is2LitOp: 1; /* True if instruction takes 2 literal operands VR - support for LFSR */
616 PIC_OPCODE inverted_op; /* Opcode of instruction that's the opposite of this one */
617 unsigned int inCond; // Input conditions for this instruction
618 unsigned int outCond; // Output conditions for this instruction
620 #define PCI_MAGIC 0x6e12
621 unsigned int pci_magic; // sanity check for pci initialization
626 /*************************************************
628 **************************************************/
630 typedef struct pCodeAsmDir
632 pCodeInstruction pci;
639 /*************************************************
641 **************************************************/
643 typedef struct pCodeLabel
650 int force; /* label cannot be optimized out */
654 /*************************************************
656 **************************************************/
658 typedef struct pCodeFunction
664 char *fname; /* If NULL, then this is the end of
665 a function. Otherwise, it's the
666 start and the name is contained
669 pBranch *from; // pCodes that execute before this one
670 pBranch *to; // pCodes that execute after
671 pBranch *label; // pCode instructions that have labels
673 int ncalled; /* Number of times function is called */
675 int absblock; /* hack to emulate a block pCodes in absolute position
676 but not inside a function */
680 /*************************************************
682 **************************************************/
684 typedef struct pCodeWild
687 pCodeInstruction pci;
689 int id; /* Index into the wild card array of a peepBlock
690 * - this wild card will get expanded into that pCode
691 * that is stored at this index */
693 /* Conditions on wild pcode instruction */
694 int mustBeBitSkipInst:1;
695 int mustNotBeBitSkipInst:1;
696 int invertBitSkipInst:1;
698 pCodeOp *operand; // Optional operand
699 pCodeOp *label; // Optional label
703 /*************************************************
706 Here are PIC program snippets. There's a strong
707 correlation between the eBBlocks and pBlocks.
708 SDCC subdivides a C program into managable chunks.
709 Each chunk becomes a eBBlock and ultimately in the
712 **************************************************/
714 typedef struct pBlock
716 memmap *cmemmap; /* The snippet is from this memmap */
717 char dbName; /* if cmemmap is NULL, then dbName will identify the block */
718 pCode *pcHead; /* A pointer to the first pCode in a link list of pCodes */
719 pCode *pcTail; /* A pointer to the last pCode in a link list of pCodes */
721 struct pBlock *next; /* The pBlocks will form a doubly linked list */
724 set *function_entries; /* dll of functions in this pblock */
730 unsigned visited:1; /* set true if traversed in call tree */
732 unsigned seq; /* sequence number of this pBlock */
736 /*************************************************
739 The collection of pBlock program snippets are
740 placed into a linked list that is implemented
741 in the pFile structure.
743 The pcode optimizer will parse the pFile.
745 **************************************************/
749 pBlock *pbHead; /* A pointer to the first pBlock */
750 pBlock *pbTail; /* A pointer to the last pBlock */
752 pBranch *functions; /* A SLL of functions in this pFile */
758 /*************************************************
761 The pCodeWildBlock object keeps track of the wild
762 variables, operands, and opcodes that exist in
764 **************************************************/
765 typedef struct pCodeWildBlock {
767 struct pCodePeep *pcp; // pointer back to ... I don't like this...
769 int nvars; // Number of wildcard registers in target.
770 char **vars; // array of pointers to them
772 int nops; // Number of wildcard operands in target.
773 pCodeOp **wildpCodeOps; // array of pointers to the pCodeOp's.
775 int nwildpCodes; // Number of wildcard pCodes in target/replace
776 pCode **wildpCodes; // array of pointers to the pCode's.
780 /*************************************************
783 The pCodePeep object mimics the peep hole optimizer
784 in the main SDCC src (e.g. SDCCpeeph.c). Essentially
785 there is a target pCode chain and a replacement
786 pCode chain. The target chain is compared to the
787 pCode that is generated by gen.c. If a match is
788 found then the pCode is replaced by the replacement
790 **************************************************/
791 typedef struct pCodePeep {
792 pCodeWildBlock target; // code we'd like to optimize
793 pCodeWildBlock replace; // and this is what we'll optimize it with.
796 //pBlock replace; // and this is what we'll optimize it with.
800 /* (Note: a wildcard register is a place holder. Any register
801 * can be replaced by the wildcard when the pcode is being
802 * compared to the target. */
804 /* Post Conditions. A post condition is a condition that
805 * must be either true or false before the peep rule is
806 * accepted. For example, a certain rule may be accepted
807 * if and only if the Z-bit is not used as an input to
808 * the subsequent instructions in a pCode chain.
810 unsigned int postFalseCond;
811 unsigned int postTrueCond;
815 /*************************************************
817 pCode peep command definitions
819 Here are some special commands that control the
820 way the peep hole optimizer behaves
822 **************************************************/
824 enum peepCommandTypes{
831 /*************************************************
832 peepCommand structure stores the peep commands.
834 **************************************************/
836 typedef struct peepCommand {
841 /*************************************************
844 **************************************************/
845 #define PCODE(x) ((pCode *)(x))
846 #define PCI(x) ((pCodeInstruction *)(x))
847 #define PCL(x) ((pCodeLabel *)(x))
848 #define PCF(x) ((pCodeFunction *)(x))
849 #define PCFL(x) ((pCodeFlow *)(x))
850 #define PCFLINK(x)((pCodeFlowLink *)(x))
851 #define PCW(x) ((pCodeWild *)(x))
852 #define PCCS(x) ((pCodeCSource *)(x))
853 #define PCAD(x) ((pCodeAsmDir *)(x))
855 #define PCOP(x) ((pCodeOp *)(x))
856 //#define PCOB(x) ((pCodeOpBit *)(x))
857 #define PCOL(x) ((pCodeOpLit *)(x))
858 #define PCOI(x) ((pCodeOpImmd *)(x))
859 #define PCOLAB(x) ((pCodeOpLabel *)(x))
860 #define PCOR(x) ((pCodeOpReg *)(x))
861 #define PCOR2(x) ((pCodeOpReg2 *)(x))
862 #define PCORB(x) ((pCodeOpRegBit *)(x))
863 #define PCOW(x) ((pCodeOpWild *)(x))
864 #define PCOW2(x) (PCOW(PCOW(x)->pcop2))
865 #define PBR(x) ((pBranch *)(x))
867 #define PCWB(x) ((pCodeWildBlock *)(x))
871 macros for checking pCode types
873 #define isPCI(x) ((PCODE(x)->type == PC_OPCODE))
874 #define isPCI_BRANCH(x) ((PCODE(x)->type == PC_OPCODE) && PCI(x)->isBranch)
875 #define isPCI_SKIP(x) ((PCODE(x)->type == PC_OPCODE) && PCI(x)->isSkip)
876 #define isPCI_LIT(x) ((PCODE(x)->type == PC_OPCODE) && PCI(x)->isLit)
877 #define isPCI_BITSKIP(x)((PCODE(x)->type == PC_OPCODE) && PCI(x)->isSkip && PCI(x)->isBitInst)
878 #define isPCFL(x) ((PCODE(x)->type == PC_FLOW))
879 #define isPCF(x) ((PCODE(x)->type == PC_FUNCTION))
880 #define isPCL(x) ((PCODE(x)->type == PC_LABEL))
881 #define isPCW(x) ((PCODE(x)->type == PC_WILD))
882 #define isPCCS(x) ((PCODE(x)->type == PC_CSOURCE))
883 #define isASMDIR(x) ((PCODE(x)->type == PC_ASMDIR))
885 #define isCALL(x) ((isPCI(x)) && (PCI(x)->op == POC_CALL))
886 #define isSTATUS_REG(r) ((r)->pc_type == PO_STATUS)
887 #define isBSR_REG(r) ((r)->pc_type == PO_BSR)
888 #define isACCESS_BANK(r) (r->accessBank)
892 #define isPCOLAB(x) ((PCOP(x)->type) == PO_LABEL)
894 /*-----------------------------------------------------------------*
896 *-----------------------------------------------------------------*/
898 pCode *pic16_newpCode (PIC_OPCODE op, pCodeOp *pcop); // Create a new pCode given an operand
899 pCode *pic16_newpCodeCharP(char *cP); // Create a new pCode given a char *
900 pCode *pic16_newpCodeInlineP(char *cP); // Create a new pCode given a char *
901 pCode *pic16_newpCodeFunction(char *g, char *f); // Create a new function
902 pCode *pic16_newpCodeLabel(char *name,int key); // Create a new label given a key
903 pCode *pic16_newpCodeLabelFORCE(char *name, int key); // Same as newpCodeLabel but label cannot be optimized out
904 pCode *pic16_newpCodeCSource(int ln, char *f, char *l); // Create a new symbol line
905 pBlock *pic16_newpCodeChain(memmap *cm,char c, pCode *pc); // Create a new pBlock
906 void pic16_printpBlock(FILE *of, pBlock *pb); // Write a pBlock to a file
907 void pic16_addpCode2pBlock(pBlock *pb, pCode *pc); // Add a pCode to a pBlock
908 void pic16_addpBlock(pBlock *pb); // Add a pBlock to a pFile
909 void pic16_copypCode(FILE *of, char dbName); // Write all pBlocks with dbName to *of
910 void pic16_movepBlock2Head(char dbName); // move pBlocks around
911 void pic16_AnalyzepCode(char dbName);
912 void pic16_AssignRegBanks(void);
913 void pic16_printCallTree(FILE *of);
914 void pCodePeepInit(void);
915 void pic16_pBlockConvert2ISR(pBlock *pb);
916 void pic16_pBlockConvert2Absolute(pBlock *pb);
917 void pic16_initDB(void);
918 void pic16_emitDB(char c, char ptype, void *p); // Add DB directives to a pBlock
919 void pic16_emitDS(char *s, char ptype, void *p);
920 void pic16_flushDB(char ptype, void *p); // Add pending DB data to a pBlock
922 pCode *pic16_newpCodeAsmDir(char *asdir, char *argfmt, ...);
924 pCodeOp *pic16_newpCodeOpLabel(char *name, int key);
925 pCodeOp *pic16_newpCodeOpImmd(char *name, int offset, int index, int code_space);
926 pCodeOp *pic16_newpCodeOpLit(int lit);
927 pCodeOp *pic16_newpCodeOpLit2(int lit, pCodeOp *arg2);
928 pCodeOp *pic16_newpCodeOpBit(char *name, int bit,int inBitSpace);
929 pCodeOp *pic16_newpCodeOpRegFromStr(char *name);
930 pCodeOp *pic16_newpCodeOp(char *name, PIC_OPTYPE p);
931 pCodeOp *pic16_pCodeOpCopy(pCodeOp *pcop);
933 pCode * pic16_findNextInstruction(pCode *pci);
934 pCode * pic16_findNextpCode(pCode *pc, PC_TYPE pct);
935 int pic16_isPCinFlow(pCode *pc, pCode *pcflow);
936 struct regs * pic16_getRegFromInstruction(pCode *pc);
937 struct regs * pic16_getRegFromInstruction2(pCode *pc);
939 extern void pic16_pcode_test(void);
940 extern int pic16_debug_verbose;
941 extern int pic16_pcode_verbose;
943 /*-----------------------------------------------------------------*
945 *-----------------------------------------------------------------*/
947 extern pCodeOpReg pic16_pc_status;
948 extern pCodeOpReg pic16_pc_intcon;
949 extern pCodeOpReg pic16_pc_pcl;
950 extern pCodeOpReg pic16_pc_pclath;
951 extern pCodeOpReg pic16_pc_pclatu; // patch 14
952 extern pCodeOpReg pic16_pc_wreg;
953 extern pCodeOpReg pic16_pc_tosl; // patch 14
954 extern pCodeOpReg pic16_pc_tosh; // patch 14
955 extern pCodeOpReg pic16_pc_tosu; // patch 14
956 extern pCodeOpReg pic16_pc_tblptrl; // patch 15
957 extern pCodeOpReg pic16_pc_tblptrh; //
958 extern pCodeOpReg pic16_pc_tblptru; //
959 extern pCodeOpReg pic16_pc_tablat; // patch 15
960 extern pCodeOpReg pic16_pc_bsr;
961 extern pCodeOpReg pic16_pc_fsr0;
962 extern pCodeOpReg pic16_pc_fsr0l;
963 extern pCodeOpReg pic16_pc_fsr0h;
964 extern pCodeOpReg pic16_pc_fsr1l;
965 extern pCodeOpReg pic16_pc_fsr1h;
966 extern pCodeOpReg pic16_pc_fsr2l;
967 extern pCodeOpReg pic16_pc_fsr2h;
968 extern pCodeOpReg pic16_pc_indf0;
969 extern pCodeOpReg pic16_pc_postinc0;
970 extern pCodeOpReg pic16_pc_postdec0;
971 extern pCodeOpReg pic16_pc_preinc0;
972 extern pCodeOpReg pic16_pc_plusw0;
973 extern pCodeOpReg pic16_pc_indf1;
974 extern pCodeOpReg pic16_pc_postinc1;
975 extern pCodeOpReg pic16_pc_postdec1;
976 extern pCodeOpReg pic16_pc_preinc1;
977 extern pCodeOpReg pic16_pc_plusw1;
978 extern pCodeOpReg pic16_pc_indf2;
979 extern pCodeOpReg pic16_pc_postinc2;
980 extern pCodeOpReg pic16_pc_postdec2;
981 extern pCodeOpReg pic16_pc_preinc2;
982 extern pCodeOpReg pic16_pc_plusw2;
983 extern pCodeOpReg pic16_pc_prodl;
984 extern pCodeOpReg pic16_pc_prodh;
986 extern pCodeOpReg pic16_pc_kzero;
987 extern pCodeOpReg pic16_pc_wsave; /* wsave and ssave are used to save W and the Status */
988 extern pCodeOpReg pic16_pc_ssave; /* registers during an interrupt */
991 #endif // __PCODE_H__