mirror of
https://github.com/gbdev/rgbds.git
synced 2025-11-20 18:22:07 +00:00
4f842a1248
The old "find symbol with auto scope" function is now three: - One finds the exact name passed to it, skipping any checks This is useful e.g. if such checks were already performed. - One checks that the name is not scoped, and calls the first. This is useful for names that cannot be scoped, such as checking for EQUS. Doing this instead of the third should improve performance somehwat, since this specific case is hit by the lexer each time an identifier is read. - The last one checks if the name should be expanded (`.loc` → `Glob.loc`), and that the local part is not scoped. This is essentially the old function.
70 lines
2.5 KiB
C
70 lines
2.5 KiB
C
/*
|
|
* This file is part of RGBDS.
|
|
*
|
|
* Copyright (c) 1997-2018, Carsten Sorensen and RGBDS contributors.
|
|
*
|
|
* SPDX-License-Identifier: MIT
|
|
*/
|
|
|
|
#ifndef RGBDS_ASM_RPN_H
|
|
#define RGBDS_ASM_RPN_H
|
|
|
|
#include <stdint.h>
|
|
#include <stdbool.h>
|
|
|
|
#include "linkdefs.h"
|
|
|
|
#define MAXRPNLEN 1048576
|
|
|
|
struct Expression {
|
|
int32_t nVal; // If the expression's value is known, it's here
|
|
char *reason; // Why the expression is not known, if it isn't
|
|
bool isKnown; // Whether the expression's value is known
|
|
bool isSymbol; // Whether the expression represents a symbol
|
|
uint8_t *tRPN; // Array of bytes serializing the RPN expression
|
|
uint32_t nRPNCapacity; // Size of the `tRPN` buffer
|
|
uint32_t nRPNLength; // Used size of the `tRPN` buffer
|
|
uint32_t nRPNPatchSize; // Size the expression will take in the obj file
|
|
};
|
|
|
|
/* FIXME: Should be defined in `parser.h`, but impossible with POSIX Yacc */
|
|
extern int32_t nPCOffset;
|
|
|
|
/*
|
|
* Determines if an expression is known at assembly time
|
|
*/
|
|
static inline bool rpn_isKnown(const struct Expression *expr)
|
|
{
|
|
return expr->isKnown;
|
|
}
|
|
|
|
/*
|
|
* Determines if an expression is a symbol suitable for const diffing
|
|
*/
|
|
static inline bool rpn_isSymbol(const struct Expression *expr)
|
|
{
|
|
return expr->isSymbol;
|
|
}
|
|
|
|
void rpn_Symbol(struct Expression *expr, char const *tzSym);
|
|
void rpn_Number(struct Expression *expr, uint32_t i);
|
|
void rpn_LOGNOT(struct Expression *expr, const struct Expression *src);
|
|
struct Symbol const *rpn_SymbolOf(struct Expression const *expr);
|
|
bool rpn_IsDiffConstant(struct Expression const *src, struct Symbol const *sym);
|
|
void rpn_BinaryOp(enum RPNCommand op, struct Expression *expr,
|
|
const struct Expression *src1,
|
|
const struct Expression *src2);
|
|
void rpn_HIGH(struct Expression *expr, const struct Expression *src);
|
|
void rpn_LOW(struct Expression *expr, const struct Expression *src);
|
|
void rpn_ISCONST(struct Expression *expr, const struct Expression *src);
|
|
void rpn_UNNEG(struct Expression *expr, const struct Expression *src);
|
|
void rpn_UNNOT(struct Expression *expr, const struct Expression *src);
|
|
void rpn_BankSymbol(struct Expression *expr, char const *tzSym);
|
|
void rpn_BankSection(struct Expression *expr, char const *tzSectionName);
|
|
void rpn_BankSelf(struct Expression *expr);
|
|
void rpn_Free(struct Expression *expr);
|
|
void rpn_CheckHRAM(struct Expression *expr, const struct Expression *src);
|
|
void rpn_CheckRST(struct Expression *expr, const struct Expression *src);
|
|
|
|
#endif /* RGBDS_ASM_RPN_H */
|