ref: f6d218ed36a01e8c99d68db760aadacab73b73a4
dir: /src/asm/parser.y/
/*
* This file is part of RGBDS.
*
* Copyright (c) 1997-2019, Carsten Sorensen and RGBDS contributors.
*
* SPDX-License-Identifier: MIT
*/
%{
#include <ctype.h>
#include <errno.h>
#include <inttypes.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "asm/charmap.h"
#include "asm/fixpoint.h"
#include "asm/format.h"
#include "asm/fstack.h"
#include "asm/lexer.h"
#include "asm/macro.h"
#include "asm/main.h"
#include "asm/opt.h"
#include "asm/output.h"
#include "asm/rpn.h"
#include "asm/section.h"
#include "asm/symbol.h"
#include "asm/util.h"
#include "asm/warning.h"
#include "extern/utf8decoder.h"
#include "linkdefs.h"
#include "platform.h" // strncasecmp, strdup
static struct CaptureBody captureBody; // Captures a REPT/FOR or MACRO
static void upperstring(char *dest, char const *src)
{
while (*src)
*dest++ = toupper(*src++);
*dest = '\0';
}
static void lowerstring(char *dest, char const *src)
{
while (*src)
*dest++ = tolower(*src++);
*dest = '\0';
}
static uint32_t str2int2(uint8_t *s, uint32_t length)
{
if (length > 4)
warning(WARNING_NUMERIC_STRING_1,
"Treating string as a number ignores first %" PRIu32 " character%s\n",
length - 4, length == 5 ? "" : "s");
else if (length > 1)
warning(WARNING_NUMERIC_STRING_2,
"Treating %" PRIu32 "-character string as a number\n", length);
uint32_t r = 0;
for (uint32_t i = length < 4 ? 0 : length - 4; i < length; i++) {
r <<= 8;
r |= s[i];
}
return r;
}
static const char *strrstr(char const *s1, char const *s2)
{
size_t len1 = strlen(s1);
size_t len2 = strlen(s2);
if (len2 > len1)
return NULL;
for (char const *p = s1 + len1 - len2; p >= s1; p--)
if (!strncmp(p, s2, len2))
return p;
return NULL;
}
static void errorInvalidUTF8Byte(uint8_t byte, char const *functionName)
{
error("%s: Invalid UTF-8 byte 0x%02hhX\n", functionName, byte);
}
static size_t strlenUTF8(char const *s)
{
size_t len = 0;
uint32_t state = 0;
for (uint32_t codep = 0; *s; s++) {
uint8_t byte = *s;
switch (decode(&state, &codep, byte)) {
case 1:
errorInvalidUTF8Byte(byte, "STRLEN");
state = 0;
// fallthrough
case 0:
len++;
break;
}
}
// Check for partial code point.
if (state != 0)
error("STRLEN: Incomplete UTF-8 character\n");
return len;
}
static void strsubUTF8(char *dest, size_t destLen, char const *src, uint32_t pos, uint32_t len)
{
size_t srcIndex = 0;
size_t destIndex = 0;
uint32_t state = 0;
uint32_t codep = 0;
uint32_t curLen = 0;
uint32_t curPos = 1;
// Advance to starting position in source string.
while (src[srcIndex] && curPos < pos) {
switch (decode(&state, &codep, src[srcIndex])) {
case 1:
errorInvalidUTF8Byte(src[srcIndex], "STRSUB");
state = 0;
// fallthrough
case 0:
curPos++;
break;
}
srcIndex++;
}
// A position 1 past the end of the string is allowed, but will trigger the
// "Length too big" warning below if the length is nonzero.
if (!src[srcIndex] && pos > curPos)
warning(WARNING_BUILTIN_ARG,
"STRSUB: Position %" PRIu32 " is past the end of the string\n", pos);
// Copy from source to destination.
while (src[srcIndex] && destIndex < destLen - 1 && curLen < len) {
switch (decode(&state, &codep, src[srcIndex])) {
case 1:
errorInvalidUTF8Byte(src[srcIndex], "STRSUB");
state = 0;
// fallthrough
case 0:
curLen++;
break;
}
dest[destIndex++] = src[srcIndex++];
}
if (curLen < len)
warning(WARNING_BUILTIN_ARG, "STRSUB: Length too big: %" PRIu32 "\n", len);
// Check for partial code point.
if (state != 0)
error("STRSUB: Incomplete UTF-8 character\n");
dest[destIndex] = '\0';
}
static size_t charlenUTF8(char const *s)
{
size_t len;
for (len = 0; charmap_ConvertNext(&s, NULL); len++)
;
return len;
}
static void charsubUTF8(char *dest, char const *src, uint32_t pos)
{
size_t charLen = 1;
// Advance to starting position in source string.
for (uint32_t curPos = 1; charLen && curPos < pos; curPos++)
charLen = charmap_ConvertNext(&src, NULL);
char const *start = src;
if (!charmap_ConvertNext(&src, NULL))
warning(WARNING_BUILTIN_ARG,
"CHARSUB: Position %" PRIu32 " is past the end of the string\n", pos);
// Copy from source to destination.
memcpy(dest, start, src - start);
dest[src - start] = '\0';
}
static uint32_t adjustNegativePos(int32_t pos, size_t len, char const *functionName)
{
// STRSUB and CHARSUB adjust negative `pos` arguments the same way,
// such that position -1 is the last character of a string.
if (pos < 0)
pos += len + 1;
if (pos < 1) {
warning(WARNING_BUILTIN_ARG, "%s: Position starts at 1\n", functionName);
pos = 1;
}
return (uint32_t)pos;
}
static void strrpl(char *dest, size_t destLen, char const *src, char const *old, char const *rep)
{
size_t oldLen = strlen(old);
size_t repLen = strlen(rep);
size_t i = 0;
if (!oldLen) {
warning(WARNING_EMPTY_STRRPL, "STRRPL: Cannot replace an empty string\n");
strcpy(dest, src);
return;
}
for (char const *next = strstr(src, old); next && *next; next = strstr(src, old)) {
// Copy anything before the substring to replace
unsigned int lenBefore = next - src;
memcpy(dest + i, src, lenBefore < destLen - i ? lenBefore : destLen - i);
i += next - src;
if (i >= destLen)
break;
// Copy the replacement substring
memcpy(dest + i, rep, repLen < destLen - i ? repLen : destLen - i);
i += repLen;
if (i >= destLen)
break;
src = next + oldLen;
}
if (i < destLen) {
size_t srcLen = strlen(src);
// Copy anything after the last replaced substring
memcpy(dest + i, src, srcLen < destLen - i ? srcLen : destLen - i);
i += srcLen;
}
if (i >= destLen) {
warning(WARNING_LONG_STR, "STRRPL: String too long, got truncated\n");
i = destLen - 1;
}
dest[i] = '\0';
}
static void initStrFmtArgList(struct StrFmtArgList *args)
{
args->nbArgs = 0;
args->capacity = INITIAL_STRFMT_ARG_SIZE;
args->args = malloc(args->capacity * sizeof(*args->args));
if (!args->args)
fatalerror("Failed to allocate memory for STRFMT arg list: %s\n",
strerror(errno));
}
static size_t nextStrFmtArgListIndex(struct StrFmtArgList *args)
{
if (args->nbArgs == args->capacity) {
args->capacity = (args->capacity + 1) * 2;
args->args = realloc(args->args, args->capacity * sizeof(*args->args));
if (!args->args)
fatalerror("realloc error while resizing STRFMT arg list: %s\n",
strerror(errno));
}
return args->nbArgs++;
}
static void freeStrFmtArgList(struct StrFmtArgList *args)
{
free(args->format);
for (size_t i = 0; i < args->nbArgs; i++)
if (!args->args[i].isNumeric)
free(args->args[i].string);
free(args->args);
}
static void strfmt(char *dest, size_t destLen, char const *fmt, size_t nbArgs, struct StrFmtArg *args)
{
size_t a = 0;
size_t i = 0;
while (i < destLen) {
int c = *fmt++;
if (c == '\0') {
break;
} else if (c != '%') {
dest[i++] = c;
continue;
}
c = *fmt++;
if (c == '%') {
dest[i++] = c;
continue;
}
struct FormatSpec spec = fmt_NewSpec();
while (c != '\0') {
fmt_UseCharacter(&spec, c);
if (fmt_IsFinished(&spec))
break;
c = *fmt++;
}
if (fmt_IsEmpty(&spec)) {
error("STRFMT: Illegal '%%' at end of format string\n");
dest[i++] = '%';
break;
} else if (!fmt_IsValid(&spec)) {
error("STRFMT: Invalid format spec for argument %zu\n", a + 1);
dest[i++] = '%';
a++;
continue;
} else if (a >= nbArgs) {
// Will warn after formatting is done.
dest[i++] = '%';
a++;
continue;
}
struct StrFmtArg *arg = &args[a++];
static char buf[MAXSTRLEN + 1];
if (arg->isNumeric)
fmt_PrintNumber(buf, sizeof(buf), &spec, arg->number);
else
fmt_PrintString(buf, sizeof(buf), &spec, arg->string);
i += snprintf(&dest[i], destLen - i, "%s", buf);
}
if (a < nbArgs)
error("STRFMT: %zu unformatted argument(s)\n", nbArgs - a);
else if (a > nbArgs)
error("STRFMT: Not enough arguments for format spec, got: %zu, need: %zu\n", nbArgs, a);
if (i > destLen - 1) {
warning(WARNING_LONG_STR, "STRFMT: String too long, got truncated\n");
i = destLen - 1;
}
dest[i] = '\0';
}
static void compoundAssignment(const char *symName, enum RPNCommand op, int32_t constValue) {
struct Expression oldExpr, constExpr, newExpr;
int32_t newValue;
rpn_Symbol(&oldExpr, symName);
rpn_Number(&constExpr, constValue);
rpn_BinaryOp(op, &newExpr, &oldExpr, &constExpr);
newValue = rpn_GetConstVal(&newExpr);
sym_AddVar(symName, newValue);
}
static void initDsArgList(struct DsArgList *args)
{
args->nbArgs = 0;
args->capacity = INITIAL_DS_ARG_SIZE;
args->args = malloc(args->capacity * sizeof(*args->args));
if (!args->args)
fatalerror("Failed to allocate memory for ds arg list: %s\n",
strerror(errno));
}
static void appendDsArgList(struct DsArgList *args, const struct Expression *expr)
{
if (args->nbArgs == args->capacity) {
args->capacity = (args->capacity + 1) * 2;
args->args = realloc(args->args, args->capacity * sizeof(*args->args));
if (!args->args)
fatalerror("realloc error while resizing ds arg list: %s\n",
strerror(errno));
}
args->args[args->nbArgs++] = *expr;
}
static void freeDsArgList(struct DsArgList *args)
{
free(args->args);
}
static void failAssert(enum AssertionType type)
{
switch (type) {
case ASSERT_FATAL:
fatalerror("Assertion failed\n");
case ASSERT_ERROR:
error("Assertion failed\n");
break;
case ASSERT_WARN:
warning(WARNING_ASSERT, "Assertion failed\n");
break;
}
}
static void failAssertMsg(enum AssertionType type, char const *msg)
{
switch (type) {
case ASSERT_FATAL:
fatalerror("Assertion failed: %s\n", msg);
case ASSERT_ERROR:
error("Assertion failed: %s\n", msg);
break;
case ASSERT_WARN:
warning(WARNING_ASSERT, "Assertion failed: %s\n", msg);
break;
}
}
void yyerror(char const *str)
{
error("%s\n", str);
}
// The CPU encodes instructions in a logical way, so most instructions actually follow patterns.
// These enums thus help with bit twiddling to compute opcodes
enum {
REG_B = 0,
REG_C,
REG_D,
REG_E,
REG_H,
REG_L,
REG_HL_IND,
REG_A
};
enum {
REG_BC_IND = 0,
REG_DE_IND,
REG_HL_INDINC,
REG_HL_INDDEC,
};
enum {
REG_BC = 0,
REG_DE = 1,
REG_HL = 2,
// LD/INC/ADD/DEC allow SP, PUSH/POP allow AF
REG_SP = 3,
REG_AF = 3
};
enum {
CC_NZ = 0,
CC_Z,
CC_NC,
CC_C
};
%}
%union
{
char symName[MAXSYMLEN + 1];
char string[MAXSTRLEN + 1];
struct Expression expr;
int32_t constValue;
enum RPNCommand compoundEqual;
enum SectionModifier sectMod;
struct SectionSpec sectSpec;
struct MacroArgs *macroArg;
enum AssertionType assertType;
struct DsArgList dsArgs;
struct {
int32_t start;
int32_t stop;
int32_t step;
} forArgs;
struct StrFmtArgList strfmtArgs;
bool captureTerminated;
}
%type <expr> relocexpr
%type <expr> relocexpr_no_str
%type <constValue> const
%type <constValue> const_no_str
%type <constValue> const_8bit
%type <constValue> uconst
%type <constValue> rs_uconst
%type <constValue> const_3bit
%type <expr> reloc_8bit
%type <expr> reloc_8bit_no_str
%type <expr> reloc_8bit_offset
%type <expr> reloc_16bit
%type <expr> reloc_16bit_no_str
%type <constValue> sectiontype
%type <string> string
%type <string> strcat_args
%type <strfmtArgs> strfmt_args
%type <strfmtArgs> strfmt_va_args
%type <constValue> sectorg
%type <sectSpec> sectattrs
%token <constValue> T_NUMBER "number"
%token <string> T_STRING "string"
%token T_PERIOD "."
%token T_COMMA ","
%token T_COLON ":"
%token T_LBRACK "[" T_RBRACK "]"
%token T_LPAREN "(" T_RPAREN ")"
%token T_NEWLINE "newline"
%token T_OP_LOGICNOT "!"
%token T_OP_LOGICAND "&&" T_OP_LOGICOR "||"
%token T_OP_LOGICGT ">" T_OP_LOGICLT "<"
%token T_OP_LOGICGE ">=" T_OP_LOGICLE "<="
%token T_OP_LOGICNE "!=" T_OP_LOGICEQU "=="
%token T_OP_ADD "+" T_OP_SUB "-"
%token T_OP_OR "|" T_OP_XOR "^" T_OP_AND "&"
%token T_OP_SHL "<<" T_OP_SHR ">>" T_OP_USHR ">>>"
%token T_OP_MUL "*" T_OP_DIV "/" T_OP_MOD "%"
%token T_OP_NOT "~"
%left T_OP_LOGICOR
%left T_OP_LOGICAND
%left T_OP_LOGICGT T_OP_LOGICLT T_OP_LOGICGE T_OP_LOGICLE T_OP_LOGICNE T_OP_LOGICEQU
%left T_OP_ADD T_OP_SUB
%left T_OP_OR T_OP_XOR T_OP_AND
%left T_OP_SHL T_OP_SHR T_OP_USHR
%left T_OP_MUL T_OP_DIV T_OP_MOD
%precedence NEG // negation -- unary minus
%token T_OP_EXP "**"
%left T_OP_EXP
%token T_OP_DEF "DEF"
%token T_OP_BANK "BANK"
%token T_OP_ALIGN "ALIGN"
%token T_OP_SIZEOF "SIZEOF" T_OP_STARTOF "STARTOF"
%token T_OP_SIN "SIN" T_OP_COS "COS" T_OP_TAN "TAN"
%token T_OP_ASIN "ASIN" T_OP_ACOS "ACOS" T_OP_ATAN "ATAN" T_OP_ATAN2 "ATAN2"
%token T_OP_FDIV "FDIV"
%token T_OP_FMUL "FMUL"
%token T_OP_FMOD "FMOD"
%token T_OP_POW "POW"
%token T_OP_LOG "LOG"
%token T_OP_ROUND "ROUND"
%token T_OP_CEIL "CEIL" T_OP_FLOOR "FLOOR"
%type <constValue> opt_q_arg
%token T_OP_HIGH "HIGH" T_OP_LOW "LOW"
%token T_OP_ISCONST "ISCONST"
%token T_OP_STRCMP "STRCMP"
%token T_OP_STRIN "STRIN" T_OP_STRRIN "STRRIN"
%token T_OP_STRSUB "STRSUB"
%token T_OP_STRLEN "STRLEN"
%token T_OP_STRCAT "STRCAT"
%token T_OP_STRUPR "STRUPR" T_OP_STRLWR "STRLWR"
%token T_OP_STRRPL "STRRPL"
%token T_OP_STRFMT "STRFMT"
%token T_OP_CHARLEN "CHARLEN"
%token T_OP_CHARSUB "CHARSUB"
%token <symName> T_LABEL "label"
%token <symName> T_ID "identifier"
%token <symName> T_LOCAL_ID "local identifier"
%token <symName> T_ANON "anonymous label"
%type <symName> def_id
%type <symName> redef_id
%type <symName> scoped_id
%type <symName> scoped_anon_id
%token T_POP_EQU "EQU"
%token T_POP_EQUAL "="
%token T_POP_EQUS "EQUS"
%token T_POP_ADDEQ "+=" T_POP_SUBEQ "-="
%token T_POP_MULEQ "*=" T_POP_DIVEQ "/=" T_POP_MODEQ "%="
%token T_POP_OREQ "|=" T_POP_XOREQ "^=" T_POP_ANDEQ "&="
%token T_POP_SHLEQ "<<=" T_POP_SHREQ ">>="
%type <compoundEqual> compoundeq
%token T_POP_INCLUDE "INCLUDE"
%token T_POP_PRINT "PRINT" T_POP_PRINTLN "PRINTLN"
%token T_POP_IF "IF" T_POP_ELIF "ELIF" T_POP_ELSE "ELSE" T_POP_ENDC "ENDC"
%token T_POP_EXPORT "EXPORT"
%token T_POP_DB "DB" T_POP_DS "DS" T_POP_DW "DW" T_POP_DL "DL"
%token T_POP_SECTION "SECTION" T_POP_FRAGMENT "FRAGMENT"
%token T_POP_RB "RB" T_POP_RW "RW" // There is no T_POP_RL, only T_Z80_RL
%token T_POP_MACRO "MACRO"
%token T_POP_ENDM "ENDM"
%token T_POP_RSRESET "RSRESET" T_POP_RSSET "RSSET"
%token T_POP_UNION "UNION" T_POP_NEXTU "NEXTU" T_POP_ENDU "ENDU"
%token T_POP_INCBIN "INCBIN" T_POP_REPT "REPT" T_POP_FOR "FOR"
%token T_POP_CHARMAP "CHARMAP"
%token T_POP_NEWCHARMAP "NEWCHARMAP"
%token T_POP_SETCHARMAP "SETCHARMAP"
%token T_POP_PUSHC "PUSHC"
%token T_POP_POPC "POPC"
%token T_POP_SHIFT "SHIFT"
%token T_POP_ENDR "ENDR"
%token T_POP_BREAK "BREAK"
%token T_POP_LOAD "LOAD" T_POP_ENDL "ENDL"
%token T_POP_FAIL "FAIL"
%token T_POP_WARN "WARN"
%token T_POP_FATAL "FATAL"
%token T_POP_ASSERT "ASSERT" T_POP_STATIC_ASSERT "STATIC_ASSERT"
%token T_POP_PURGE "PURGE"
%token T_POP_REDEF "REDEF"
%token T_POP_POPS "POPS"
%token T_POP_PUSHS "PUSHS"
%token T_POP_POPO "POPO"
%token T_POP_PUSHO "PUSHO"
%token T_POP_OPT "OPT"
%token T_SECT_ROM0 "ROM0" T_SECT_ROMX "ROMX"
%token T_SECT_WRAM0 "WRAM0" T_SECT_WRAMX "WRAMX" T_SECT_HRAM "HRAM"
%token T_SECT_VRAM "VRAM" T_SECT_SRAM "SRAM" T_SECT_OAM "OAM"
%type <sectMod> sectmod
%type <macroArg> macroargs
%type <dsArgs> ds_args
%type <forArgs> for_args
%token T_Z80_ADC "adc" T_Z80_ADD "add" T_Z80_AND "and"
%token T_Z80_BIT "bit"
%token T_Z80_CALL "call" T_Z80_CCF "ccf" T_Z80_CP "cp" T_Z80_CPL "cpl"
%token T_Z80_DAA "daa" T_Z80_DEC "dec" T_Z80_DI "di"
%token T_Z80_EI "ei"
%token T_Z80_HALT "halt"
%token T_Z80_INC "inc"
%token T_Z80_JP "jp" T_Z80_JR "jr"
%token T_Z80_LD "ld"
%token T_Z80_LDI "ldi"
%token T_Z80_LDD "ldd"
%token T_Z80_LDH "ldh"
%token T_Z80_NOP "nop"
%token T_Z80_OR "or"
%token T_Z80_POP "pop" T_Z80_PUSH "push"
%token T_Z80_RES "res" T_Z80_RET "ret" T_Z80_RETI "reti" T_Z80_RST "rst"
%token T_Z80_RL "rl" T_Z80_RLA "rla" T_Z80_RLC "rlc" T_Z80_RLCA "rlca"
%token T_Z80_RR "rr" T_Z80_RRA "rra" T_Z80_RRC "rrc" T_Z80_RRCA "rrca"
%token T_Z80_SBC "sbc" T_Z80_SCF "scf" T_Z80_SET "set" T_Z80_STOP "stop"
%token T_Z80_SLA "sla" T_Z80_SRA "sra" T_Z80_SRL "srl" T_Z80_SUB "sub"
%token T_Z80_SWAP "swap"
%token T_Z80_XOR "xor"
%token T_TOKEN_A "a"
%token T_TOKEN_B "b" T_TOKEN_C "c"
%token T_TOKEN_D "d" T_TOKEN_E "e"
%token T_TOKEN_H "h" T_TOKEN_L "l"
%token T_MODE_AF "af" T_MODE_BC "bc" T_MODE_DE "de" T_MODE_SP "sp"
%token T_MODE_HL "hl" T_MODE_HL_DEC "hld/hl-" T_MODE_HL_INC "hli/hl+"
%token T_CC_NZ "nz" T_CC_Z "z" T_CC_NC "nc" // There is no T_CC_C, only T_TOKEN_C
%type <constValue> reg_r
%type <constValue> reg_ss
%type <constValue> reg_rr
%type <constValue> reg_tt
%type <constValue> ccode_expr
%type <constValue> ccode
%type <expr> op_a_n
%type <constValue> op_a_r
%type <expr> op_mem_ind
%type <assertType> assert_type
%token T_EOB "end of buffer"
%token T_EOF 0 "end of file"
%start asmfile
%%
asmfile : lines
;
lines : %empty
| lines opt_diff_mark line
;
endofline : T_NEWLINE | T_EOB
;
opt_diff_mark : %empty // OK
| T_OP_ADD {
error("syntax error, unexpected + at the beginning of the line (is it a leftover diff mark?)\n");
}
| T_OP_SUB {
error("syntax error, unexpected - at the beginning of the line (is it a leftover diff mark?)\n");
}
;
line : plain_directive endofline
| line_directive // Directives that manage newlines themselves
// Continue parsing the next line on a syntax error
| error {
lexer_SetMode(LEXER_NORMAL);
lexer_ToggleStringExpansion(true);
} endofline {
fstk_StopRept();
yyerrok;
}
// Hint about unindented macros parsed as labels
| T_LABEL error {
lexer_SetMode(LEXER_NORMAL);
lexer_ToggleStringExpansion(true);
} endofline {
struct Symbol *macro = sym_FindExactSymbol($1);
if (macro && macro->type == SYM_MACRO)
fprintf(stderr,
" To invoke `%s` as a macro it must be indented\n", $1);
fstk_StopRept();
yyerrok;
}
;
// For "logistical" reasons, these directives must manage newlines themselves.
// This is because we need to switch the lexer's mode *after* the newline has been read,
// and to avoid causing some grammar conflicts (token reducing is finicky).
// This is DEFINITELY one of the more FRAGILE parts of the codebase, handle with care.
line_directive : macrodef
| rept
| for
| break
| include
| if
// It's important that all of these require being at line start for `skipIfBlock`
| elif
| else
;
if : T_POP_IF const T_NEWLINE {
lexer_IncIFDepth();
if ($2)
lexer_RunIFBlock();
else
lexer_SetMode(LEXER_SKIP_TO_ELIF);
}
;
elif : T_POP_ELIF const T_NEWLINE {
if (lexer_GetIFDepth() == 0)
fatalerror("Found ELIF outside an IF construct\n");
if (lexer_RanIFBlock()) {
if (lexer_ReachedELSEBlock())
fatalerror("Found ELIF after an ELSE block\n");
lexer_SetMode(LEXER_SKIP_TO_ENDC);
} else if ($2) {
lexer_RunIFBlock();
} else {
lexer_SetMode(LEXER_SKIP_TO_ELIF);
}
}
;
else : T_POP_ELSE T_NEWLINE {
if (lexer_GetIFDepth() == 0)
fatalerror("Found ELSE outside an IF construct\n");
if (lexer_RanIFBlock()) {
if (lexer_ReachedELSEBlock())
fatalerror("Found ELSE after an ELSE block\n");
lexer_SetMode(LEXER_SKIP_TO_ENDC);
} else {
lexer_RunIFBlock();
lexer_ReachELSEBlock();
}
}
;
plain_directive : label
| label cpu_command
| label macro
| label directive
| assignment_directive
;
endc : T_POP_ENDC {
lexer_DecIFDepth();
}
;
def_id : T_OP_DEF {
lexer_ToggleStringExpansion(false);
} T_ID {
lexer_ToggleStringExpansion(true);
strcpy($$, $3);
}
;
redef_id : T_POP_REDEF {
lexer_ToggleStringExpansion(false);
} T_ID {
lexer_ToggleStringExpansion(true);
strcpy($$, $3);
}
;
scoped_id : T_ID | T_LOCAL_ID;
scoped_anon_id : scoped_id | T_ANON;
label : %empty
| T_COLON {
sym_AddAnonLabel();
}
| T_LOCAL_ID {
sym_AddLocalLabel($1);
}
| T_LOCAL_ID T_COLON {
sym_AddLocalLabel($1);
}
| T_LABEL T_COLON {
sym_AddLabel($1);
}
| T_LOCAL_ID T_COLON T_COLON {
sym_AddLocalLabel($1);
sym_Export($1);
}
| T_LABEL T_COLON T_COLON {
sym_AddLabel($1);
sym_Export($1);
}
;
macro : T_ID {
// Parsing 'macroargs' will restore the lexer's normal mode
lexer_SetMode(LEXER_RAW);
} macroargs {
fstk_RunMacro($1, $3);
}
;
macroargs : %empty {
$$ = macro_NewArgs();
}
| macroargs T_STRING {
macro_AppendArg(&($$), strdup($2));
}
;
// These commands start with a T_LABEL.
assignment_directive : equ
| assignment
| rb
| rw
| rl
| equs
;
directive : endc
| print
| println
| export
| db
| dw
| dl
| ds
| section
| rsreset
| rsset
| union
| nextu
| endu
| incbin
| charmap
| newcharmap
| setcharmap
| pushc
| popc
| load
| shift
| fail
| warn
| assert
| def_equ
| redef_equ
| def_set
| def_rb
| def_rw
| def_rl
| def_equs
| redef_equs
| purge
| pops
| pushs
| popo
| pusho
| opt
| align
;
trailing_comma : %empty | T_COMMA
;
compoundeq : T_POP_ADDEQ { $$ = RPN_ADD; }
| T_POP_SUBEQ { $$ = RPN_SUB; }
| T_POP_MULEQ { $$ = RPN_MUL; }
| T_POP_DIVEQ { $$ = RPN_DIV; }
| T_POP_MODEQ { $$ = RPN_MOD; }
| T_POP_XOREQ { $$ = RPN_XOR; }
| T_POP_OREQ { $$ = RPN_OR; }
| T_POP_ANDEQ { $$ = RPN_AND; }
| T_POP_SHLEQ { $$ = RPN_SHL; }
| T_POP_SHREQ { $$ = RPN_SHR; }
;
equ : T_LABEL T_POP_EQU const { sym_AddEqu($1, $3); }
;
assignment : T_LABEL T_POP_EQUAL const { sym_AddVar($1, $3); }
| T_LABEL compoundeq const { compoundAssignment($1, $2, $3); }
;
equs : T_LABEL T_POP_EQUS string { sym_AddString($1, $3); }
;
rb : T_LABEL T_POP_RB rs_uconst {
sym_AddEqu($1, sym_GetConstantValue("_RS"));
sym_AddVar("_RS", sym_GetConstantValue("_RS") + $3);
}
;
rw : T_LABEL T_POP_RW rs_uconst {
sym_AddEqu($1, sym_GetConstantValue("_RS"));
sym_AddVar("_RS", sym_GetConstantValue("_RS") + 2 * $3);
}
;
rl : T_LABEL T_Z80_RL rs_uconst {
sym_AddEqu($1, sym_GetConstantValue("_RS"));
sym_AddVar("_RS", sym_GetConstantValue("_RS") + 4 * $3);
}
;
align : T_OP_ALIGN uconst {
if ($2 > 16)
error("Alignment must be between 0 and 16, not %u\n", $2);
else
sect_AlignPC($2, 0);
}
| T_OP_ALIGN uconst T_COMMA uconst {
if ($2 > 16)
error("Alignment must be between 0 and 16, not %u\n", $2);
else if ($4 >= 1 << $2)
error("Offset must be between 0 and %u, not %u\n",
(1 << $2) - 1, $4);
else
sect_AlignPC($2, $4);
}
;
opt : T_POP_OPT {
// Parsing 'opt_list' will restore the lexer's normal mode
lexer_SetMode(LEXER_RAW);
} opt_list
;
opt_list : opt_list_entry
| opt_list opt_list_entry
;
opt_list_entry : T_STRING { opt_Parse($1); }
;
popo : T_POP_POPO { opt_Pop(); }
;
pusho : T_POP_PUSHO { opt_Push(); }
;
pops : T_POP_POPS { sect_PopSection(); }
;
pushs : T_POP_PUSHS { sect_PushSection(); }
;
fail : T_POP_FAIL string { fatalerror("%s\n", $2); }
;
warn : T_POP_WARN string { warning(WARNING_USER, "%s\n", $2); }
;
assert_type : %empty { $$ = ASSERT_ERROR; }
| T_POP_WARN T_COMMA { $$ = ASSERT_WARN; }
| T_POP_FAIL T_COMMA { $$ = ASSERT_ERROR; }
| T_POP_FATAL T_COMMA { $$ = ASSERT_FATAL; }
;
assert : T_POP_ASSERT assert_type relocexpr {
if (!rpn_isKnown(&$3)) {
if (!out_CreateAssert($2, &$3, "",
sect_GetOutputOffset()))
error("Assertion creation failed: %s\n",
strerror(errno));
} else if ($3.val == 0) {
failAssert($2);
}
rpn_Free(&$3);
}
| T_POP_ASSERT assert_type relocexpr T_COMMA string {
if (!rpn_isKnown(&$3)) {
if (!out_CreateAssert($2, &$3, $5,
sect_GetOutputOffset()))
error("Assertion creation failed: %s\n",
strerror(errno));
} else if ($3.val == 0) {
failAssertMsg($2, $5);
}
rpn_Free(&$3);
}
| T_POP_STATIC_ASSERT assert_type const {
if ($3 == 0)
failAssert($2);
}
| T_POP_STATIC_ASSERT assert_type const T_COMMA string {
if ($3 == 0)
failAssertMsg($2, $5);
}
;
shift : T_POP_SHIFT { macro_ShiftCurrentArgs(1); }
| T_POP_SHIFT const { macro_ShiftCurrentArgs($2); }
;
load : T_POP_LOAD sectmod string T_COMMA sectiontype sectorg sectattrs {
sect_SetLoadSection($3, $5, $6, &$7, $2);
}
| T_POP_ENDL { sect_EndLoadSection(); }
;
rept : T_POP_REPT uconst T_NEWLINE {
$<captureTerminated>$ = lexer_CaptureRept(&captureBody);
} endofline {
if ($<captureTerminated>4)
fstk_RunRept($2, captureBody.lineNo, captureBody.body,
captureBody.size);
}
;
for : T_POP_FOR {
lexer_ToggleStringExpansion(false);
} T_ID {
lexer_ToggleStringExpansion(true);
} T_COMMA for_args T_NEWLINE {
$<captureTerminated>$ = lexer_CaptureRept(&captureBody);
} endofline {
if ($<captureTerminated>8)
fstk_RunFor($3, $6.start, $6.stop, $6.step, captureBody.lineNo,
captureBody.body, captureBody.size);
}
for_args : const {
$$.start = 0;
$$.stop = $1;
$$.step = 1;
}
| const T_COMMA const {
$$.start = $1;
$$.stop = $3;
$$.step = 1;
}
| const T_COMMA const T_COMMA const {
$$.start = $1;
$$.stop = $3;
$$.step = $5;
}
;
break : label T_POP_BREAK endofline {
if (fstk_Break())
lexer_SetMode(LEXER_SKIP_TO_ENDR);
}
;
macrodef : T_POP_MACRO {
lexer_ToggleStringExpansion(false);
} T_ID {
lexer_ToggleStringExpansion(true);
} T_NEWLINE {
$<captureTerminated>$ = lexer_CaptureMacroBody(&captureBody);
} endofline {
if ($<captureTerminated>6)
sym_AddMacro($3, captureBody.lineNo, captureBody.body,
captureBody.size);
}
| T_LABEL T_COLON T_POP_MACRO T_NEWLINE {
warning(WARNING_OBSOLETE, "`%s: MACRO` is deprecated; use `MACRO %s`\n", $1, $1);
$<captureTerminated>$ = lexer_CaptureMacroBody(&captureBody);
} endofline {
if ($<captureTerminated>5)
sym_AddMacro($1, captureBody.lineNo, captureBody.body,
captureBody.size);
}
;
rsset : T_POP_RSSET uconst { sym_AddVar("_RS", $2); }
;
rsreset : T_POP_RSRESET { sym_AddVar("_RS", 0); }
;
rs_uconst : %empty { $$ = 1; }
| uconst
;
union : T_POP_UNION { sect_StartUnion(); }
;
nextu : T_POP_NEXTU { sect_NextUnionMember(); }
;
endu : T_POP_ENDU { sect_EndUnion(); }
;
ds : T_POP_DS uconst { sect_Skip($2, true); }
| T_POP_DS uconst T_COMMA ds_args trailing_comma {
sect_RelBytes($2, $4.args, $4.nbArgs);
freeDsArgList(&$4);
}
;
ds_args : reloc_8bit {
initDsArgList(&$$);
appendDsArgList(&$$, &$1);
}
| ds_args T_COMMA reloc_8bit {
appendDsArgList(&$1, &$3);
$$ = $1;
}
;
db : T_POP_DB { sect_Skip(1, false); }
| T_POP_DB constlist_8bit trailing_comma
;
dw : T_POP_DW { sect_Skip(2, false); }
| T_POP_DW constlist_16bit trailing_comma
;
dl : T_POP_DL { sect_Skip(4, false); }
| T_POP_DL constlist_32bit trailing_comma
;
def_equ : def_id T_POP_EQU const { sym_AddEqu($1, $3); }
;
redef_equ : redef_id T_POP_EQU const { sym_RedefEqu($1, $3); }
;
def_set : def_id T_POP_EQUAL const { sym_AddVar($1, $3); }
| redef_id T_POP_EQUAL const { sym_AddVar($1, $3); }
| def_id compoundeq const { compoundAssignment($1, $2, $3); }
| redef_id compoundeq const { compoundAssignment($1, $2, $3); }
;
def_rb : def_id T_POP_RB rs_uconst {
sym_AddEqu($1, sym_GetConstantValue("_RS"));
sym_AddVar("_RS", sym_GetConstantValue("_RS") + $3);
}
;
def_rw : def_id T_POP_RW rs_uconst {
sym_AddEqu($1, sym_GetConstantValue("_RS"));
sym_AddVar("_RS", sym_GetConstantValue("_RS") + 2 * $3);
}
;
def_rl : def_id T_Z80_RL rs_uconst {
sym_AddEqu($1, sym_GetConstantValue("_RS"));
sym_AddVar("_RS", sym_GetConstantValue("_RS") + 4 * $3);
}
;
def_equs : def_id T_POP_EQUS string { sym_AddString($1, $3); }
;
redef_equs : redef_id T_POP_EQUS string { sym_RedefString($1, $3); }
;
purge : T_POP_PURGE {
lexer_ToggleStringExpansion(false);
} purge_list trailing_comma {
lexer_ToggleStringExpansion(true);
}
;
purge_list : purge_list_entry
| purge_list T_COMMA purge_list_entry
;
purge_list_entry : scoped_id { sym_Purge($1); }
;
export : T_POP_EXPORT export_list trailing_comma
;
export_list : export_list_entry
| export_list T_COMMA export_list_entry
;
export_list_entry : scoped_id { sym_Export($1); }
;
include : label T_POP_INCLUDE string endofline {
fstk_RunInclude($3);
if (failedOnMissingInclude)
YYACCEPT;
}
;
incbin : T_POP_INCBIN string {
sect_BinaryFile($2, 0);
if (failedOnMissingInclude)
YYACCEPT;
}
| T_POP_INCBIN string T_COMMA const {
sect_BinaryFile($2, $4);
if (failedOnMissingInclude)
YYACCEPT;
}
| T_POP_INCBIN string T_COMMA const T_COMMA const {
sect_BinaryFileSlice($2, $4, $6);
if (failedOnMissingInclude)
YYACCEPT;
}
;
charmap : T_POP_CHARMAP string T_COMMA const_8bit {
charmap_Add($2, (uint8_t)$4);
}
;
newcharmap : T_POP_NEWCHARMAP T_ID { charmap_New($2, NULL); }
| T_POP_NEWCHARMAP T_ID T_COMMA T_ID { charmap_New($2, $4); }
;
setcharmap : T_POP_SETCHARMAP T_ID { charmap_Set($2); }
;
pushc : T_POP_PUSHC { charmap_Push(); }
;
popc : T_POP_POPC { charmap_Pop(); }
;
print : T_POP_PRINT print_exprs trailing_comma
;
println : T_POP_PRINTLN {
putchar('\n');
fflush(stdout);
}
| T_POP_PRINTLN print_exprs trailing_comma {
putchar('\n');
fflush(stdout);
}
;
print_exprs : print_expr
| print_exprs T_COMMA print_expr
;
print_expr : const_no_str { printf("$%" PRIX32, $1); }
| string { printf("%s", $1); }
;
const_3bit : const {
int32_t value = $1;
if ((value < 0) || (value > 7)) {
error("Immediate value must be 3-bit\n");
$$ = 0;
} else {
$$ = value & 0x7;
}
}
;
constlist_8bit : constlist_8bit_entry
| constlist_8bit T_COMMA constlist_8bit_entry
;
constlist_8bit_entry : reloc_8bit_no_str {
sect_RelByte(&$1, 0);
}
| string {
uint8_t *output = malloc(strlen($1)); // Cannot be larger than that
size_t length = charmap_Convert($1, output);
sect_AbsByteGroup(output, length);
free(output);
}
;
constlist_16bit : constlist_16bit_entry
| constlist_16bit T_COMMA constlist_16bit_entry
;
constlist_16bit_entry : reloc_16bit_no_str {
sect_RelWord(&$1, 0);
}
| string {
uint8_t *output = malloc(strlen($1)); // Cannot be larger than that
size_t length = charmap_Convert($1, output);
sect_AbsWordGroup(output, length);
free(output);
}
;
constlist_32bit : constlist_32bit_entry
| constlist_32bit T_COMMA constlist_32bit_entry
;
constlist_32bit_entry : relocexpr_no_str {
sect_RelLong(&$1, 0);
}
| string {
// Charmaps cannot increase the length of a string
uint8_t *output = malloc(strlen($1));
size_t length = charmap_Convert($1, output);
sect_AbsLongGroup(output, length);
free(output);
}
;
reloc_8bit : relocexpr {
rpn_CheckNBit(&$1, 8);
$$ = $1;
}
;
reloc_8bit_no_str : relocexpr_no_str {
rpn_CheckNBit(&$1, 8);
$$ = $1;
}
;
reloc_8bit_offset : T_OP_ADD relocexpr {
rpn_CheckNBit(&$2, 8);
$$ = $2;
}
| T_OP_SUB relocexpr {
rpn_UNNEG(&$$, &$2);
rpn_CheckNBit(&$$, 8);
}
;
reloc_16bit : relocexpr {
rpn_CheckNBit(&$1, 16);
$$ = $1;
}
;
reloc_16bit_no_str : relocexpr_no_str {
rpn_CheckNBit(&$1, 16);
$$ = $1;
}
;
relocexpr : relocexpr_no_str
| string {
// Charmaps cannot increase the length of a string
uint8_t *output = malloc(strlen($1));
uint32_t length = charmap_Convert($1, output);
uint32_t r = str2int2(output, length);
free(output);
rpn_Number(&$$, r);
}
;
relocexpr_no_str : scoped_anon_id { rpn_Symbol(&$$, $1); }
| T_NUMBER { rpn_Number(&$$, $1); }
| T_OP_LOGICNOT relocexpr %prec NEG {
rpn_LOGNOT(&$$, &$2);
}
| relocexpr T_OP_LOGICOR relocexpr {
rpn_BinaryOp(RPN_LOGOR, &$$, &$1, &$3);
}
| relocexpr T_OP_LOGICAND relocexpr {
rpn_BinaryOp(RPN_LOGAND, &$$, &$1, &$3);
}
| relocexpr T_OP_LOGICEQU relocexpr {
rpn_BinaryOp(RPN_LOGEQ, &$$, &$1, &$3);
}
| relocexpr T_OP_LOGICGT relocexpr {
rpn_BinaryOp(RPN_LOGGT, &$$, &$1, &$3);
}
| relocexpr T_OP_LOGICLT relocexpr {
rpn_BinaryOp(RPN_LOGLT, &$$, &$1, &$3);
}
| relocexpr T_OP_LOGICGE relocexpr {
rpn_BinaryOp(RPN_LOGGE, &$$, &$1, &$3);
}
| relocexpr T_OP_LOGICLE relocexpr {
rpn_BinaryOp(RPN_LOGLE, &$$, &$1, &$3);
}
| relocexpr T_OP_LOGICNE relocexpr {
rpn_BinaryOp(RPN_LOGNE, &$$, &$1, &$3);
}
| relocexpr T_OP_ADD relocexpr {
rpn_BinaryOp(RPN_ADD, &$$, &$1, &$3);
}
| relocexpr T_OP_SUB relocexpr {
rpn_BinaryOp(RPN_SUB, &$$, &$1, &$3);
}
| relocexpr T_OP_XOR relocexpr {
rpn_BinaryOp(RPN_XOR, &$$, &$1, &$3);
}
| relocexpr T_OP_OR relocexpr {
rpn_BinaryOp(RPN_OR, &$$, &$1, &$3);
}
| relocexpr T_OP_AND relocexpr {
rpn_BinaryOp(RPN_AND, &$$, &$1, &$3);
}
| relocexpr T_OP_SHL relocexpr {
rpn_BinaryOp(RPN_SHL, &$$, &$1, &$3);
}
| relocexpr T_OP_SHR relocexpr {
rpn_BinaryOp(RPN_SHR, &$$, &$1, &$3);
}
| relocexpr T_OP_USHR relocexpr {
rpn_BinaryOp(RPN_USHR, &$$, &$1, &$3);
}
| relocexpr T_OP_MUL relocexpr {
rpn_BinaryOp(RPN_MUL, &$$, &$1, &$3);
}
| relocexpr T_OP_DIV relocexpr {
rpn_BinaryOp(RPN_DIV, &$$, &$1, &$3);
}
| relocexpr T_OP_MOD relocexpr {
rpn_BinaryOp(RPN_MOD, &$$, &$1, &$3);
}
| relocexpr T_OP_EXP relocexpr {
rpn_BinaryOp(RPN_EXP, &$$, &$1, &$3);
}
| T_OP_ADD relocexpr %prec NEG { $$ = $2; }
| T_OP_SUB relocexpr %prec NEG { rpn_UNNEG(&$$, &$2); }
| T_OP_NOT relocexpr %prec NEG { rpn_UNNOT(&$$, &$2); }
| T_OP_HIGH T_LPAREN relocexpr T_RPAREN { rpn_HIGH(&$$, &$3); }
| T_OP_LOW T_LPAREN relocexpr T_RPAREN { rpn_LOW(&$$, &$3); }
| T_OP_ISCONST T_LPAREN relocexpr T_RPAREN { rpn_ISCONST(&$$, &$3); }
| T_OP_BANK T_LPAREN scoped_anon_id T_RPAREN {
// '@' is also a T_ID; it is handled here
rpn_BankSymbol(&$$, $3);
}
| T_OP_BANK T_LPAREN string T_RPAREN { rpn_BankSection(&$$, $3); }
| T_OP_SIZEOF T_LPAREN string T_RPAREN { rpn_SizeOfSection(&$$, $3); }
| T_OP_STARTOF T_LPAREN string T_RPAREN { rpn_StartOfSection(&$$, $3); }
| T_OP_DEF {
lexer_ToggleStringExpansion(false);
} T_LPAREN scoped_anon_id T_RPAREN {
rpn_Number(&$$, sym_FindScopedValidSymbol($4) != NULL);
lexer_ToggleStringExpansion(true);
}
| T_OP_ROUND T_LPAREN const opt_q_arg T_RPAREN {
rpn_Number(&$$, fix_Round($3, $4));
}
| T_OP_CEIL T_LPAREN const opt_q_arg T_RPAREN {
rpn_Number(&$$, fix_Ceil($3, $4));
}
| T_OP_FLOOR T_LPAREN const opt_q_arg T_RPAREN {
rpn_Number(&$$, fix_Floor($3, $4));
}
| T_OP_FDIV T_LPAREN const T_COMMA const opt_q_arg T_RPAREN {
rpn_Number(&$$, fix_Div($3, $5, $6));
}
| T_OP_FMUL T_LPAREN const T_COMMA const opt_q_arg T_RPAREN {
rpn_Number(&$$, fix_Mul($3, $5, $6));
}
| T_OP_FMOD T_LPAREN const T_COMMA const opt_q_arg T_RPAREN {
rpn_Number(&$$, fix_Mod($3, $5, $6));
}
| T_OP_POW T_LPAREN const T_COMMA const opt_q_arg T_RPAREN {
rpn_Number(&$$, fix_Pow($3, $5, $6));
}
| T_OP_LOG T_LPAREN const T_COMMA const opt_q_arg T_RPAREN {
rpn_Number(&$$, fix_Log($3, $5, $6));
}
| T_OP_SIN T_LPAREN const opt_q_arg T_RPAREN {
rpn_Number(&$$, fix_Sin($3, $4));
}
| T_OP_COS T_LPAREN const opt_q_arg T_RPAREN {
rpn_Number(&$$, fix_Cos($3, $4));
}
| T_OP_TAN T_LPAREN const opt_q_arg T_RPAREN {
rpn_Number(&$$, fix_Tan($3, $4));
}
| T_OP_ASIN T_LPAREN const opt_q_arg T_RPAREN {
rpn_Number(&$$, fix_ASin($3, $4));
}
| T_OP_ACOS T_LPAREN const opt_q_arg T_RPAREN {
rpn_Number(&$$, fix_ACos($3, $4));
}
| T_OP_ATAN T_LPAREN const opt_q_arg T_RPAREN {
rpn_Number(&$$, fix_ATan($3, $4));
}
| T_OP_ATAN2 T_LPAREN const T_COMMA const opt_q_arg T_RPAREN {
rpn_Number(&$$, fix_ATan2($3, $5, $6));
}
| T_OP_STRCMP T_LPAREN string T_COMMA string T_RPAREN {
rpn_Number(&$$, strcmp($3, $5));
}
| T_OP_STRIN T_LPAREN string T_COMMA string T_RPAREN {
char const *p = strstr($3, $5);
rpn_Number(&$$, p ? p - $3 + 1 : 0);
}
| T_OP_STRRIN T_LPAREN string T_COMMA string T_RPAREN {
char const *p = strrstr($3, $5);
rpn_Number(&$$, p ? p - $3 + 1 : 0);
}
| T_OP_STRLEN T_LPAREN string T_RPAREN {
rpn_Number(&$$, strlenUTF8($3));
}
| T_OP_CHARLEN T_LPAREN string T_RPAREN {
rpn_Number(&$$, charlenUTF8($3));
}
| T_LPAREN relocexpr T_RPAREN { $$ = $2; }
;
uconst : const {
$$ = $1;
if ($$ < 0)
fatalerror("Constant must not be negative: %d\n", $1);
}
;
const : relocexpr { $$ = rpn_GetConstVal(&$1); }
;
const_no_str : relocexpr_no_str { $$ = rpn_GetConstVal(&$1); }
;
const_8bit : reloc_8bit { $$ = rpn_GetConstVal(&$1); }
;
opt_q_arg : %empty { $$ = fix_Precision(); }
| T_COMMA const {
if ($2 >= 1 && $2 <= 31) {
$$ = $2;
} else {
error("Fixed-point precision must be between 1 and 31\n");
$$ = fix_Precision();
}
}
;
string : T_STRING
| T_OP_STRSUB T_LPAREN string T_COMMA const T_COMMA uconst T_RPAREN {
size_t len = strlenUTF8($3);
uint32_t pos = adjustNegativePos($5, len, "STRSUB");
strsubUTF8($$, sizeof($$), $3, pos, $7);
}
| T_OP_STRSUB T_LPAREN string T_COMMA const T_RPAREN {
size_t len = strlenUTF8($3);
uint32_t pos = adjustNegativePos($5, len, "STRSUB");
strsubUTF8($$, sizeof($$), $3, pos, pos > len ? 0 : len + 1 - pos);
}
| T_OP_CHARSUB T_LPAREN string T_COMMA const T_RPAREN {
size_t len = charlenUTF8($3);
uint32_t pos = adjustNegativePos($5, len, "CHARSUB");
charsubUTF8($$, $3, pos);
}
| T_OP_STRCAT T_LPAREN T_RPAREN {
$$[0] = '\0';
}
| T_OP_STRCAT T_LPAREN strcat_args T_RPAREN {
strcpy($$, $3);
}
| T_OP_STRUPR T_LPAREN string T_RPAREN {
upperstring($$, $3);
}
| T_OP_STRLWR T_LPAREN string T_RPAREN {
lowerstring($$, $3);
}
| T_OP_STRRPL T_LPAREN string T_COMMA string T_COMMA string T_RPAREN {
strrpl($$, sizeof($$), $3, $5, $7);
}
| T_OP_STRFMT T_LPAREN strfmt_args T_RPAREN {
strfmt($$, sizeof($$), $3.format, $3.nbArgs, $3.args);
freeStrFmtArgList(&$3);
}
| T_POP_SECTION T_LPAREN scoped_anon_id T_RPAREN {
struct Symbol *sym = sym_FindScopedValidSymbol($3);
if (!sym)
fatalerror("Unknown symbol \"%s\"\n", $3);
struct Section const *section = sym_GetSection(sym);
if (!section)
fatalerror("\"%s\" does not belong to any section\n", sym->name);
// Section names are capped by rgbasm's maximum string length,
// so this currently can't overflow.
strcpy($$, section->name);
}
;
strcat_args : string
| strcat_args T_COMMA string {
int ret = snprintf($$, sizeof($$), "%s%s", $1, $3);
if (ret == -1)
fatalerror("snprintf error in STRCAT: %s\n", strerror(errno));
else if ((unsigned int)ret >= sizeof($$))
warning(WARNING_LONG_STR, "STRCAT: String too long '%s%s'\n",
$1, $3);
}
;
strfmt_args : string strfmt_va_args {
$$.format = strdup($1);
$$.capacity = $2.capacity;
$$.nbArgs = $2.nbArgs;
$$.args = $2.args;
}
;
strfmt_va_args : %empty {
initStrFmtArgList(&$$);
}
| strfmt_va_args T_COMMA const_no_str {
size_t i = nextStrFmtArgListIndex(&$1);
$1.args[i].number = $3;
$1.args[i].isNumeric = true;
$$ = $1;
}
| strfmt_va_args T_COMMA string {
size_t i = nextStrFmtArgListIndex(&$1);
$1.args[i].string = strdup($3);
$1.args[i].isNumeric = false;
$$ = $1;
}
;
section : T_POP_SECTION sectmod string T_COMMA sectiontype sectorg sectattrs {
sect_NewSection($3, $5, $6, &$7, $2);
}
;
sectmod : %empty { $$ = SECTION_NORMAL; }
| T_POP_UNION { $$ = SECTION_UNION; }
| T_POP_FRAGMENT { $$ = SECTION_FRAGMENT; }
;
sectiontype : T_SECT_WRAM0 { $$ = SECTTYPE_WRAM0; }
| T_SECT_VRAM { $$ = SECTTYPE_VRAM; }
| T_SECT_ROMX { $$ = SECTTYPE_ROMX; }
| T_SECT_ROM0 { $$ = SECTTYPE_ROM0; }
| T_SECT_HRAM { $$ = SECTTYPE_HRAM; }
| T_SECT_WRAMX { $$ = SECTTYPE_WRAMX; }
| T_SECT_SRAM { $$ = SECTTYPE_SRAM; }
| T_SECT_OAM { $$ = SECTTYPE_OAM; }
;
sectorg : %empty { $$ = -1; }
| T_LBRACK uconst T_RBRACK {
if ($2 < 0 || $2 >= 0x10000) {
error("Address $%x is not 16-bit\n", $2);
$$ = -1;
} else {
$$ = $2;
}
}
;
sectattrs : %empty {
$$.alignment = 0;
$$.alignOfs = 0;
$$.bank = -1;
}
| sectattrs T_COMMA T_OP_ALIGN T_LBRACK uconst T_RBRACK {
$$.alignment = $5;
}
| sectattrs T_COMMA T_OP_ALIGN T_LBRACK uconst T_COMMA uconst T_RBRACK {
$$.alignment = $5;
$$.alignOfs = $7;
}
| sectattrs T_COMMA T_OP_BANK T_LBRACK uconst T_RBRACK {
// We cannot check the validity of this now
$$.bank = $5;
}
;
cpu_command : z80_adc
| z80_add
| z80_and
| z80_bit
| z80_call
| z80_ccf
| z80_cp
| z80_cpl
| z80_daa
| z80_dec
| z80_di
| z80_ei
| z80_halt
| z80_inc
| z80_jp
| z80_jr
| z80_ld
| z80_ldd
| z80_ldi
| z80_ldio
| z80_nop
| z80_or
| z80_pop
| z80_push
| z80_res
| z80_ret
| z80_reti
| z80_rl
| z80_rla
| z80_rlc
| z80_rlca
| z80_rr
| z80_rra
| z80_rrc
| z80_rrca
| z80_rst
| z80_sbc
| z80_scf
| z80_set
| z80_sla
| z80_sra
| z80_srl
| z80_stop
| z80_sub
| z80_swap
| z80_xor
;
z80_adc : T_Z80_ADC op_a_n {
sect_AbsByte(0xCE);
sect_RelByte(&$2, 1);
}
| T_Z80_ADC op_a_r { sect_AbsByte(0x88 | $2); }
;
z80_add : T_Z80_ADD op_a_n {
sect_AbsByte(0xC6);
sect_RelByte(&$2, 1);
}
| T_Z80_ADD op_a_r { sect_AbsByte(0x80 | $2); }
| T_Z80_ADD T_MODE_HL T_COMMA reg_ss { sect_AbsByte(0x09 | ($4 << 4)); }
| T_Z80_ADD T_MODE_SP T_COMMA reloc_8bit {
sect_AbsByte(0xE8);
sect_RelByte(&$4, 1);
}
;
z80_and : T_Z80_AND op_a_n {
sect_AbsByte(0xE6);
sect_RelByte(&$2, 1);
}
| T_Z80_AND op_a_r { sect_AbsByte(0xA0 | $2); }
;
z80_bit : T_Z80_BIT const_3bit T_COMMA reg_r {
sect_AbsByte(0xCB);
sect_AbsByte(0x40 | ($2 << 3) | $4);
}
;
z80_call : T_Z80_CALL reloc_16bit {
sect_AbsByte(0xCD);
sect_RelWord(&$2, 1);
}
| T_Z80_CALL ccode_expr T_COMMA reloc_16bit {
sect_AbsByte(0xC4 | ($2 << 3));
sect_RelWord(&$4, 1);
}
;
z80_ccf : T_Z80_CCF { sect_AbsByte(0x3F); }
;
z80_cp : T_Z80_CP op_a_n {
sect_AbsByte(0xFE);
sect_RelByte(&$2, 1);
}
| T_Z80_CP op_a_r { sect_AbsByte(0xB8 | $2); }
;
z80_cpl : T_Z80_CPL { sect_AbsByte(0x2F); }
;
z80_daa : T_Z80_DAA { sect_AbsByte(0x27); }
;
z80_dec : T_Z80_DEC reg_r { sect_AbsByte(0x05 | ($2 << 3)); }
| T_Z80_DEC reg_ss { sect_AbsByte(0x0B | ($2 << 4)); }
;
z80_di : T_Z80_DI { sect_AbsByte(0xF3); }
;
z80_ei : T_Z80_EI { sect_AbsByte(0xFB); }
;
z80_halt : T_Z80_HALT {
sect_AbsByte(0x76);
if (haltnop) {
if (warnOnHaltNop) {
warnOnHaltNop = false;
warning(WARNING_OBSOLETE, "`nop` after `halt` will stop being the default; pass `-H` to opt into it\n");
}
sect_AbsByte(0x00);
}
}
;
z80_inc : T_Z80_INC reg_r { sect_AbsByte(0x04 | ($2 << 3)); }
| T_Z80_INC reg_ss { sect_AbsByte(0x03 | ($2 << 4)); }
;
z80_jp : T_Z80_JP reloc_16bit {
sect_AbsByte(0xC3);
sect_RelWord(&$2, 1);
}
| T_Z80_JP ccode_expr T_COMMA reloc_16bit {
sect_AbsByte(0xC2 | ($2 << 3));
sect_RelWord(&$4, 1);
}
| T_Z80_JP T_MODE_HL {
sect_AbsByte(0xE9);
}
;
z80_jr : T_Z80_JR reloc_16bit {
sect_AbsByte(0x18);
sect_PCRelByte(&$2, 1);
}
| T_Z80_JR ccode_expr T_COMMA reloc_16bit {
sect_AbsByte(0x20 | ($2 << 3));
sect_PCRelByte(&$4, 1);
}
;
z80_ldi : T_Z80_LDI T_LBRACK T_MODE_HL T_RBRACK T_COMMA T_MODE_A {
sect_AbsByte(0x02 | (2 << 4));
}
| T_Z80_LDI T_MODE_A T_COMMA T_LBRACK T_MODE_HL T_RBRACK {
sect_AbsByte(0x0A | (2 << 4));
}
;
z80_ldd : T_Z80_LDD T_LBRACK T_MODE_HL T_RBRACK T_COMMA T_MODE_A {
sect_AbsByte(0x02 | (3 << 4));
}
| T_Z80_LDD T_MODE_A T_COMMA T_LBRACK T_MODE_HL T_RBRACK {
sect_AbsByte(0x0A | (3 << 4));
}
;
z80_ldio : T_Z80_LDH T_MODE_A T_COMMA op_mem_ind {
rpn_CheckHRAM(&$4, &$4);
sect_AbsByte(0xF0);
sect_RelByte(&$4, 1);
}
| T_Z80_LDH op_mem_ind T_COMMA T_MODE_A {
rpn_CheckHRAM(&$2, &$2);
sect_AbsByte(0xE0);
sect_RelByte(&$2, 1);
}
| T_Z80_LDH T_MODE_A T_COMMA c_ind {
sect_AbsByte(0xF2);
}
| T_Z80_LDH c_ind T_COMMA T_MODE_A {
sect_AbsByte(0xE2);
}
;
c_ind : T_LBRACK T_MODE_C T_RBRACK
| T_LBRACK relocexpr T_OP_ADD T_MODE_C T_RBRACK {
if (!rpn_isKnown(&$2) || $2.val != 0xff00)
error("Expected constant expression equal to $FF00 for \"$ff00+c\"\n");
}
;
z80_ld : z80_ld_mem
| z80_ld_cind
| z80_ld_rr
| z80_ld_ss
| z80_ld_hl
| z80_ld_sp
| z80_ld_r
| z80_ld_a
;
z80_ld_hl : T_Z80_LD T_MODE_HL T_COMMA T_MODE_SP reloc_8bit_offset {
sect_AbsByte(0xF8);
sect_RelByte(&$5, 1);
}
| T_Z80_LD T_MODE_HL T_COMMA reloc_16bit {
sect_AbsByte(0x01 | (REG_HL << 4));
sect_RelWord(&$4, 1);
}
;
z80_ld_sp : T_Z80_LD T_MODE_SP T_COMMA T_MODE_HL { sect_AbsByte(0xF9); }
| T_Z80_LD T_MODE_SP T_COMMA reloc_16bit {
sect_AbsByte(0x01 | (REG_SP << 4));
sect_RelWord(&$4, 1);
}
;
z80_ld_mem : T_Z80_LD op_mem_ind T_COMMA T_MODE_SP {
sect_AbsByte(0x08);
sect_RelWord(&$2, 1);
}
| T_Z80_LD op_mem_ind T_COMMA T_MODE_A {
if (optimizeLoads && rpn_isKnown(&$2)
&& $2.val >= 0xFF00) {
if (warnOnLdOpt) {
warnOnLdOpt = false;
warning(WARNING_OBSOLETE, "ld optimization will stop being the default; pass `-l` to opt into it\n");
}
sect_AbsByte(0xE0);
sect_AbsByte($2.val & 0xFF);
rpn_Free(&$2);
} else {
sect_AbsByte(0xEA);
sect_RelWord(&$2, 1);
}
}
;
z80_ld_cind : T_Z80_LD c_ind T_COMMA T_MODE_A {
sect_AbsByte(0xE2);
}
;
z80_ld_rr : T_Z80_LD reg_rr T_COMMA T_MODE_A {
sect_AbsByte(0x02 | ($2 << 4));
}
;
z80_ld_r : T_Z80_LD reg_r T_COMMA reloc_8bit {
sect_AbsByte(0x06 | ($2 << 3));
sect_RelByte(&$4, 1);
}
| T_Z80_LD reg_r T_COMMA reg_r {
if (($2 == REG_HL_IND) && ($4 == REG_HL_IND))
error("LD [HL],[HL] not a valid instruction\n");
else
sect_AbsByte(0x40 | ($2 << 3) | $4);
}
;
z80_ld_a : T_Z80_LD reg_r T_COMMA c_ind {
if ($2 == REG_A)
sect_AbsByte(0xF2);
else
error("Destination operand must be A\n");
}
| T_Z80_LD reg_r T_COMMA reg_rr {
if ($2 == REG_A)
sect_AbsByte(0x0A | ($4 << 4));
else
error("Destination operand must be A\n");
}
| T_Z80_LD reg_r T_COMMA op_mem_ind {
if ($2 == REG_A) {
if (optimizeLoads && rpn_isKnown(&$4)
&& $4.val >= 0xFF00) {
if (warnOnLdOpt) {
warnOnLdOpt = false;
warning(WARNING_OBSOLETE, "ld optimization will stop being the default; pass `-l` to opt into it\n");
}
sect_AbsByte(0xF0);
sect_AbsByte($4.val & 0xFF);
rpn_Free(&$4);
} else {
sect_AbsByte(0xFA);
sect_RelWord(&$4, 1);
}
} else {
error("Destination operand must be A\n");
rpn_Free(&$4);
}
}
;
z80_ld_ss : T_Z80_LD T_MODE_BC T_COMMA reloc_16bit {
sect_AbsByte(0x01 | (REG_BC << 4));
sect_RelWord(&$4, 1);
}
| T_Z80_LD T_MODE_DE T_COMMA reloc_16bit {
sect_AbsByte(0x01 | (REG_DE << 4));
sect_RelWord(&$4, 1);
}
// HL is taken care of in z80_ld_hl
// SP is taken care of in z80_ld_sp
;
z80_nop : T_Z80_NOP { sect_AbsByte(0x00); }
;
z80_or : T_Z80_OR op_a_n {
sect_AbsByte(0xF6);
sect_RelByte(&$2, 1);
}
| T_Z80_OR op_a_r { sect_AbsByte(0xB0 | $2); }
;
z80_pop : T_Z80_POP reg_tt { sect_AbsByte(0xC1 | ($2 << 4)); }
;
z80_push : T_Z80_PUSH reg_tt { sect_AbsByte(0xC5 | ($2 << 4)); }
;
z80_res : T_Z80_RES const_3bit T_COMMA reg_r {
sect_AbsByte(0xCB);
sect_AbsByte(0x80 | ($2 << 3) | $4);
}
;
z80_ret : T_Z80_RET { sect_AbsByte(0xC9); }
| T_Z80_RET ccode_expr { sect_AbsByte(0xC0 | ($2 << 3)); }
;
z80_reti : T_Z80_RETI { sect_AbsByte(0xD9); }
;
z80_rl : T_Z80_RL reg_r {
sect_AbsByte(0xCB);
sect_AbsByte(0x10 | $2);
}
;
z80_rla : T_Z80_RLA { sect_AbsByte(0x17); }
;
z80_rlc : T_Z80_RLC reg_r {
sect_AbsByte(0xCB);
sect_AbsByte(0x00 | $2);
}
;
z80_rlca : T_Z80_RLCA { sect_AbsByte(0x07); }
;
z80_rr : T_Z80_RR reg_r {
sect_AbsByte(0xCB);
sect_AbsByte(0x18 | $2);
}
;
z80_rra : T_Z80_RRA { sect_AbsByte(0x1F); }
;
z80_rrc : T_Z80_RRC reg_r {
sect_AbsByte(0xCB);
sect_AbsByte(0x08 | $2);
}
;
z80_rrca : T_Z80_RRCA { sect_AbsByte(0x0F); }
;
z80_rst : T_Z80_RST reloc_8bit {
rpn_CheckRST(&$2, &$2);
if (!rpn_isKnown(&$2))
sect_RelByte(&$2, 0);
else
sect_AbsByte(0xC7 | $2.val);
rpn_Free(&$2);
}
;
z80_sbc : T_Z80_SBC op_a_n {
sect_AbsByte(0xDE);
sect_RelByte(&$2, 1);
}
| T_Z80_SBC op_a_r { sect_AbsByte(0x98 | $2); }
;
z80_scf : T_Z80_SCF { sect_AbsByte(0x37); }
;
z80_set : T_Z80_SET const_3bit T_COMMA reg_r {
sect_AbsByte(0xCB);
sect_AbsByte(0xC0 | ($2 << 3) | $4);
}
;
z80_sla : T_Z80_SLA reg_r {
sect_AbsByte(0xCB);
sect_AbsByte(0x20 | $2);
}
;
z80_sra : T_Z80_SRA reg_r {
sect_AbsByte(0xCB);
sect_AbsByte(0x28 | $2);
}
;
z80_srl : T_Z80_SRL reg_r {
sect_AbsByte(0xCB);
sect_AbsByte(0x38 | $2);
}
;
z80_stop : T_Z80_STOP {
sect_AbsByte(0x10);
sect_AbsByte(0x00);
}
| T_Z80_STOP reloc_8bit {
sect_AbsByte(0x10);
sect_RelByte(&$2, 1);
}
;
z80_sub : T_Z80_SUB op_a_n {
sect_AbsByte(0xD6);
sect_RelByte(&$2, 1);
}
| T_Z80_SUB op_a_r { sect_AbsByte(0x90 | $2); }
;
z80_swap : T_Z80_SWAP reg_r {
sect_AbsByte(0xCB);
sect_AbsByte(0x30 | $2);
}
;
z80_xor : T_Z80_XOR op_a_n {
sect_AbsByte(0xEE);
sect_RelByte(&$2, 1);
}
| T_Z80_XOR op_a_r { sect_AbsByte(0xA8 | $2); }
;
op_mem_ind : T_LBRACK reloc_16bit T_RBRACK { $$ = $2; }
;
op_a_r : reg_r
| T_MODE_A T_COMMA reg_r { $$ = $3; }
;
op_a_n : reloc_8bit
| T_MODE_A T_COMMA reloc_8bit { $$ = $3; }
;
T_MODE_A : T_TOKEN_A
| T_OP_HIGH T_LPAREN T_MODE_AF T_RPAREN
;
T_MODE_B : T_TOKEN_B
| T_OP_HIGH T_LPAREN T_MODE_BC T_RPAREN
;
T_MODE_C : T_TOKEN_C
| T_OP_LOW T_LPAREN T_MODE_BC T_RPAREN
;
T_MODE_D : T_TOKEN_D
| T_OP_HIGH T_LPAREN T_MODE_DE T_RPAREN
;
T_MODE_E : T_TOKEN_E
| T_OP_LOW T_LPAREN T_MODE_DE T_RPAREN
;
T_MODE_H : T_TOKEN_H
| T_OP_HIGH T_LPAREN T_MODE_HL T_RPAREN
;
T_MODE_L : T_TOKEN_L
| T_OP_LOW T_LPAREN T_MODE_HL T_RPAREN
;
ccode_expr : ccode
| T_OP_LOGICNOT ccode_expr {
$$ = $2 ^ 1;
}
;
ccode : T_CC_NZ { $$ = CC_NZ; }
| T_CC_Z { $$ = CC_Z; }
| T_CC_NC { $$ = CC_NC; }
| T_TOKEN_C { $$ = CC_C; }
;
reg_r : T_MODE_B { $$ = REG_B; }
| T_MODE_C { $$ = REG_C; }
| T_MODE_D { $$ = REG_D; }
| T_MODE_E { $$ = REG_E; }
| T_MODE_H { $$ = REG_H; }
| T_MODE_L { $$ = REG_L; }
| T_LBRACK T_MODE_HL T_RBRACK { $$ = REG_HL_IND; }
| T_MODE_A { $$ = REG_A; }
;
reg_tt : T_MODE_BC { $$ = REG_BC; }
| T_MODE_DE { $$ = REG_DE; }
| T_MODE_HL { $$ = REG_HL; }
| T_MODE_AF { $$ = REG_AF; }
;
reg_ss : T_MODE_BC { $$ = REG_BC; }
| T_MODE_DE { $$ = REG_DE; }
| T_MODE_HL { $$ = REG_HL; }
| T_MODE_SP { $$ = REG_SP; }
;
reg_rr : T_LBRACK T_MODE_BC T_RBRACK { $$ = REG_BC_IND; }
| T_LBRACK T_MODE_DE T_RBRACK { $$ = REG_DE_IND; }
| hl_ind_inc { $$ = REG_HL_INDINC; }
| hl_ind_dec { $$ = REG_HL_INDDEC; }
;
hl_ind_inc : T_LBRACK T_MODE_HL_INC T_RBRACK
| T_LBRACK T_MODE_HL T_OP_ADD T_RBRACK
;
hl_ind_dec : T_LBRACK T_MODE_HL_DEC T_RBRACK
| T_LBRACK T_MODE_HL T_OP_SUB T_RBRACK
;
%%