126 lines
2.6 KiB
C
126 lines
2.6 KiB
C
/* $Header$ */
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/*
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* pattern contains the optimization patterns in an apparently
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* unordered fashion. All patterns follow each other unaligned.
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* Each pattern looks as follows:
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* Byte 0: high byte of hash value associated with this pattern.
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* Byte 1-2: index of next pattern with same low byte of hash value.
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* Byte 3- : pattern and replacement.
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* First comes the pattern length
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* then the pattern opcodes,
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* then a boolean expression,
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* then the one-byte replacement length
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* then the intermixed pattern opcodes and operands or
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* 0 followed by the one-byte special optimization expression.
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* If the DIAGOPT option is set, the optimization is followed
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* by the line number in the tables.
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*/
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/* #define ALLOWSPECIAL /* Special optimizations allowed */
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#define PO_HASH 0
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#define PO_NEXT 1
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#define PO_MATCH 3
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struct exprnode {
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short ex_operator;
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short ex_lnode;
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short ex_rnode;
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};
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typedef struct exprnode expr_t;
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typedef struct exprnode *expr_p;
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/*
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* contents of .ex_operator
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*/
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#define EX_CON 0
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#define EX_ARG 1
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#define EX_CMPEQ 2
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#define EX_CMPNE 3
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#define EX_CMPGT 4
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#define EX_CMPGE 5
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#define EX_CMPLT 6
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#define EX_CMPLE 7
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#define EX_OR2 8
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#define EX_AND2 9
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#define EX_OR1 10
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#define EX_XOR1 11
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#define EX_AND1 12
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#define EX_PLUS 13
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#define EX_MINUS 14
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#define EX_TIMES 15
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#define EX_DIVIDE 16
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#define EX_MOD 17
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#define EX_LSHIFT 18
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#define EX_RSHIFT 19
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#define EX_UMINUS 20
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#define EX_NOT 21
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#define EX_COMP 22
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#define EX_ROM 23
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#define EX_NOTREG 24
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#define EX_POINTERSIZE 25
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#define EX_WORDSIZE 26
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#define EX_DEFINED 27
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#define EX_SAMESIGN 28
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#define EX_SFIT 29
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#define EX_UFIT 30
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#define EX_ROTATE 31
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#define N_EX_OPS 32 /* must be one higher then previous */
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/*
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* Definition of special opcodes used in patterns
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*/
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#define op_pfirst op_LLP
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#define op_LLP (op_last+1)
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#define op_LEP (op_last+2)
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#define op_SLP (op_last+3)
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#define op_SEP (op_last+4)
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#define op_plast op_SEP
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/*
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* Definition of the structure in which instruction operands
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* are kept during pattern matching.
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*/
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typedef struct eval eval_t;
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typedef struct eval *eval_p;
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struct eval {
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short e_typ;
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union {
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offset e_con;
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num_p e_np;
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} e_v;
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};
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/*
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* contents of .e_typ
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*/
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#define EV_UNDEF 0
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#define EV_CONST 1
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#define EV_NUMLAB 2
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#define EV_FRAG 3 /* and all higher numbers */
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typedef struct iarg iarg_t;
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typedef struct iarg *iarg_p;
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struct iarg {
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eval_t ia_ev;
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sym_p ia_sp;
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};
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/*
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* The next extern declarations refer to data generated by mktab
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*/
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extern byte pattern[];
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extern short lastind;
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extern iarg_t iargs[];
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extern byte nparam[];
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extern bool nonumlab[];
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extern bool onlyconst[];
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extern expr_t enodes[];
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