93 lines
1.8 KiB
C
93 lines
1.8 KiB
C
/*
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* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
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* See the copyright notice in the ACK home directory, in the file "Copyright".
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*/
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/* $Header$ */
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#define NARGBYTES 14
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struct argbytes {
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argb_p ab_next;
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short ab_index;
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char ab_contents[NARGBYTES];
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};
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typedef struct {
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sym_p av_sp;
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offset av_offset;
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} s_a_val;
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typedef struct {
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short ac_length;
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argb_t ac_con;
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} s_a_con;
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typedef union {
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offset a_offset;
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num_p a_np;
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sym_p a_sp;
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s_a_val a_val;
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argb_t a_string;
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s_a_con a_con;
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} un_a_a;
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struct arg {
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arg_p a_next;
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short a_typ;
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un_a_a a_a;
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};
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/* possible values for .a_typ
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*/
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#define ARGOFF 0
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#define ARGNUM 1
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#define ARGSYM 2
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#define ARGVAL 3
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#define ARGSTR 4
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#define ARGICN 5
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#define ARGUCN 6
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#define ARGFCN 7
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typedef struct {
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sym_p lasv_sp;
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short lasv_short;
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} s_la_sval;
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typedef struct {
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sym_p lalv_sp;
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offset lalv_offset;
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} s_la_lval;
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typedef union {
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short la_short;
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offset la_offset;
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num_p la_np;
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sym_p la_sp;
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s_la_sval la_sval;
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s_la_lval la_lval;
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arg_p la_arg;
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} un_l_a;
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struct line {
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line_p l_next; /* maintains linked list */
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line_p l_prev; /* for back referencing loc's */
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byte l_instr; /* instruction number */
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byte l_optyp; /* specifies what follows */
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un_l_a l_a;
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};
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/* Possible values for .l_optyp */
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#define OPNO 0 /* no operand */
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#define OPSHORT 1 /* 16 bit number */
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#define OPOFFSET 2 /* 16 or 32 bit number */
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#define OPNUMLAB 3 /* local label for branches */
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#define OPSYMBOL 4 /* global label or procedurename */
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#define OPSVAL 5 /* symbol + 16 bit constant */
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#define OPLVAL 6 /* symbol + 16 or 32 bit constant */
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#define OPLIST 7 /* operand list for some pseudos */
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#define OPMINI 8 /* start of minis */
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#define Z_OPMINI (OPMINI+100) /* tunable */
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#define CANMINI(x) ((x)>=OPMINI-Z_OPMINI && (x)<256-Z_OPMINI)
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