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/********************************************
code.h
copyright 1991, Michael D. Brennan
This is a source file for mawk, an implementation of
the AWK programming language.
Mawk is distributed without warranty under the terms of
the GNU General Public License, version 2, 1991.
********************************************/
/* $Log: code.h,v $
* Revision 1.5 1995/06/18 19:42:15 mike
* Remove some redundant declarations and add some prototypes
*
* Revision 1.4 1994/12/13 00:13:01 mike
* delete A statement to delete all of A at once
*
* Revision 1.3 1993/12/01 14:25:06 mike
* reentrant array loops
*
* Revision 1.2 1993/07/22 00:04:01 mike
* new op code _LJZ _LJNZ
*
* Revision 1.1.1.1 1993/07/03 18:58:10 mike
* move source to cvs
*
* Revision 5.3 1993/01/14 13:11:11 mike
* code2() -> xcode2()
*
* Revision 5.2 1993/01/07 02:50:33 mike
* relative vs absolute code
*
* Revision 5.1 1991/12/05 07:59:07 brennan
* 1.1 pre-release
*
*/
/* code.h */
#ifndef CODE_H
#define CODE_H
#include "memory.h"
#define PAGESZ 512
/* number of code instructions allocated at one time */
#define CODEWARN 16
/* coding scope */
#define SCOPE_MAIN 0
#define SCOPE_BEGIN 1
#define SCOPE_END 2
#define SCOPE_FUNCT 3
typedef struct {
INST *base, *limit, *warn, *ptr ;
} CODEBLOCK ;
extern CODEBLOCK active_code ;
extern CODEBLOCK *main_code_p, *begin_code_p, *end_code_p ;
extern INST *main_start, *begin_start, *end_start ;
extern unsigned main_size, begin_size ;
extern INST *execution_start ;
extern INST *next_label ; /* next statements jump to here */
extern int dump_code_flag ;
#define code_ptr active_code.ptr
#define code_base active_code.base
#define code_warn active_code.warn
#define code_limit active_code.limit
#define code_offset (code_ptr-code_base)
#define INST_BYTES(x) (sizeof(INST)*(unsigned)(x))
extern CELL eval_stack[] ;
extern int exit_code ;
#define code1(x) code_ptr++ -> op = (x)
/* shutup picky compilers */
#define code2(x,p) xcode2(x,(PTR)(p))
void PROTO(xcode2, (int, PTR)) ;
void PROTO(code2op, (int, int)) ;
INST *PROTO(code_shrink, (CODEBLOCK*, unsigned*)) ;
void PROTO(code_grow, (void)) ;
void PROTO(set_code, (void)) ;
void PROTO(be_setup, (int)) ;
void PROTO(dump_code, (void)) ;
/* the machine opcodes */
/* to avoid confusion with a ptr FE_PUSHA must have op code 0 */
/* unfortunately enums are less portable than defines */
#define FE_PUSHA 0
#define FE_PUSHI 1
#define F_PUSHA 2
#define F_PUSHI 3
#define NF_PUSHI 4
#define _HALT 5
#define _STOP 6
#define _PUSHC 7
#define _PUSHD 8
#define _PUSHS 9
#define _PUSHINT 10
#define _PUSHA 11
#define _PUSHI 12
#define L_PUSHA 13
#define L_PUSHI 14
#define AE_PUSHA 15
#define AE_PUSHI 16
#define A_PUSHA 17
#define LAE_PUSHA 18
#define LAE_PUSHI 19
#define LA_PUSHA 20
#define _POP 21
#define _ADD 22
#define _SUB 23
#define _MUL 24
#define _DIV 25
#define _MOD 26
#define _POW 27
#define _NOT 28
#define _TEST 29
#define A_TEST 30
#define A_DEL 31
#define ALOOP 32
#define A_CAT 33
#define _UMINUS 34
#define _UPLUS 35
#define _ASSIGN 36
#define _ADD_ASG 37
#define _SUB_ASG 38
#define _MUL_ASG 39
#define _DIV_ASG 40
#define _MOD_ASG 41
#define _POW_ASG 42
#define F_ASSIGN 43
#define F_ADD_ASG 44
#define F_SUB_ASG 45
#define F_MUL_ASG 46
#define F_DIV_ASG 47
#define F_MOD_ASG 48
#define F_POW_ASG 49
#define _CAT 50
#define _BUILTIN 51
#define _PRINT 52
#define _POST_INC 53
#define _POST_DEC 54
#define _PRE_INC 55
#define _PRE_DEC 56
#define F_POST_INC 57
#define F_POST_DEC 58
#define F_PRE_INC 59
#define F_PRE_DEC 60
#define _JMP 61
#define _JNZ 62
#define _JZ 63
#define _LJZ 64
#define _LJNZ 65
#define _EQ 66
#define _NEQ 67
#define _LT 68
#define _LTE 69
#define _GT 70
#define _GTE 71
#define _MATCH0 72
#define _MATCH1 73
#define _MATCH2 74
#define _EXIT 75
#define _EXIT0 76
#define _NEXT 77
#define _RANGE 78
#define _CALL 79
#define _RET 80
#define _RET0 81
#define SET_ALOOP 82
#define POP_AL 83
#define OL_GL 84
#define OL_GL_NR 85
#define _OMAIN 86
#define _JMAIN 87
#define DEL_A 88
#endif /* CODE_H */
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