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(uxnasm) Updated

This commit is contained in:
Devine Lu Linvega 2024-03-28 17:52:50 -07:00
parent b302645412
commit 5fdd442ec3
1 changed files with 276 additions and 402 deletions
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678
src/uxnasm.c
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@ -1,7 +1,7 @@
#include <stdio.h> #include <stdio.h>
/* /*
Copyright (c) 2021-2023 Devine Lu Linvega, Andrew Alderwick Copyright (c) 2021-2024 Devine Lu Linvega, Andrew Alderwick
Permission to use, copy, modify, and distribute this software for any Permission to use, copy, modify, and distribute this software for any
purpose with or without fee is hereby granted, provided that the above purpose with or without fee is hereby granted, provided that the above
@ -11,43 +11,25 @@ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE. WITH REGARD TO THIS SOFTWARE.
*/ */
#define TRIM 0x0100 /* clang-format off */
#define LENGTH 0x10000
#define PAGE 0x0100
typedef unsigned char Uint8; typedef unsigned char Uint8;
typedef signed char Sint8; typedef signed char Sint8;
typedef unsigned short Uint16; typedef unsigned short Uint16;
typedef struct { char *name, rune, *content; Uint16 addr, refs; } Item;
typedef struct { int line; char *path; } Context;
typedef struct { static int ptr, length;
char name[0x40], items[0x40][0x40]; static char token[0x40], scope[0x40], lambda[0x05];
Uint8 len; static char dict[0x4000], *dictnext = dict;
} Macro; static Uint8 data[0x10000], lambda_stack[0x100], lambda_ptr, lambda_len;
static Uint16 labels_len, refs_len, macro_len;
typedef struct { static Item labels[0x400], refs[0x1000], macros[0x100];
char name[0x40];
Uint16 addr, refs;
} Label;
typedef struct {
char name[0x40], rune;
Uint16 addr;
} Reference;
typedef struct {
Uint8 data[LENGTH];
Uint8 lambda_stack[0x100], lambda_ptr, lambda_count;
char scope[0x40], lambda[0x10], *location, *entry;
unsigned int ptr, length;
Uint16 label_len, macro_len, refs_len;
Label labels[0x400];
Macro macros[0x100];
Reference refs[0x1000];
} Program;
Program p;
/* clang-format off */
static char *runes = "|$@&,_.-;=!?#\"%~";
static char *hexad = "0123456789abcdef";
static char ops[][4] = { static char ops[][4] = {
"LIT", "INC", "POP", "NIP", "SWP", "ROT", "DUP", "OVR", "LIT", "INC", "POP", "NIP", "SWP", "ROT", "DUP", "OVR",
"EQU", "NEQ", "GTH", "LTH", "JMP", "JCN", "JSR", "STH", "EQU", "NEQ", "GTH", "LTH", "JMP", "JCN", "JSR", "STH",
@ -55,68 +37,47 @@ static char ops[][4] = {
"ADD", "SUB", "MUL", "DIV", "AND", "ORA", "EOR", "SFT" "ADD", "SUB", "MUL", "DIV", "AND", "ORA", "EOR", "SFT"
}; };
static char *runes = "|$@&,_.-;=!?#\"%~"; static int find(char *s, char t) { int i = 0; char c; while((c = *s++)) { if(c == t) return i; i++; } return -1; } /* chr in str */
static int shex(char *s) { int n = 0; char c; while((c = *s++)) { if(find(hexad, c) < 0) return -1; n = n << 4, n |= find(hexad, c); } return n; } /* str to hex */
static int scmp(char *a, char *b, int len) { int i = 0; while(a[i] == b[i]) if(!a[i] || ++i >= len) return 1; return 0; } /* str compare */
static char *scpy(char *src, char *dst, int len) { int i = 0; while((dst[i] = src[i]) && i < len - 2) i++; dst[i + 1] = '\0'; return dst; } /* str copy */
static char *save(char *s, char c) { char *o = dictnext; while((*dictnext++ = *s++) && *s); *dictnext++ = c; return o; } /* save to dict */
static char *join(char *a, char j, char *b) { char *res = dictnext; save(a, j), save(b, 0); return res; } /* join two str */
static int scmp(char *a, char *b, int len) { int i = 0; while(a[i] == b[i]) if(!a[i] || ++i >= len) return 1; return 0; } /* string compare */ #define ishex(x) (shex(x) >= 0)
static int sihx(char *s) { int i = 0; char c; while((c = s[i++])) if(!(c >= '0' && c <= '9') && !(c >= 'a' && c <= 'f')) return 0; return i > 1; } /* string is hexadecimal */ #define isopc(x) (findopcode(x) || scmp(x, "BRK", 4))
static int shex(char *s) { int n = 0, i = 0; char c; while((c = s[i++])) if(c >= '0' && c <= '9') n = n * 16 + (c - '0'); else if(c >= 'a' && c <= 'f') n = n * 16 + 10 + (c - 'a'); return n; } /* string to num */ #define isinvalid(x) (!x[0] || ishex(x) || isopc(x) || find(runes, x[0]) >= 0)
static int slen(char *s) { int i = 0; while(s[i]) i++; return i; } /* string length */ #define writeshort(x) (writebyte(x >> 8, ctx) && writebyte(x & 0xff, ctx))
static int spos(char *s, char c) { Uint8 i = 0, j; while((j = s[i++])) if(j == c) return i; return -1; } /* character position */ #define findlabel(x) finditem(x, labels, labels_len)
static char *scpy(char *src, char *dst, int len) { int i = 0; while((dst[i] = src[i]) && i < len - 2) i++; dst[i + 1] = '\0'; return dst; } /* string copy */ #define findmacro(x) finditem(x, macros, macro_len)
static char *scat(char *dst, const char *src) { char *ptr = dst + slen(dst); while(*src) *ptr++ = *src++; *ptr = '\0'; return dst; } /* string cat */ #define error_top(name, msg) !fprintf(stderr, "%s: %s\n", name, msg)
#define error_asm(name) !fprintf(stderr, "%s: %s in @%s, %s:%d.\n", name, token, scope, ctx->path, ctx->line)
/* clang-format on */ /* clang-format on */
static int parse(char *w, FILE *f); static int parse(char *w, FILE *f, Context *ctx);
static int
error_top(const char *name, const char *msg)
{
fprintf(stderr, "%s: %s\n", name, msg);
return 0;
}
static int
error_asm(const char *name, const char *msg)
{
fprintf(stderr, "%s: %s in @%s, %s:%d.\n", name, msg, p.scope, p.location, 123);
return 0;
}
static char * static char *
setlocation(char *name) push(char *s, char c)
{ {
p.location = name; char *d = dict;
return name; for(d = dict; d < dictnext; d++) {
} char *ss = s, *dd = d, a, b;
while((a = *dd++) == (b = *ss++))
static char * if(!a && !b) return d;
sublabel(char *src, char *scope, char *name)
{
if(slen(scope) + slen(name) >= 0x3f) {
error_asm("Sublabel length too long", name);
return NULL;
} }
return scat(scat(scpy(scope, src, 0x40), "/"), name); return save(s, c);
} }
static Macro * static Item *
findmacro(char *name) finditem(char *name, Item *list, int len)
{ {
int i; int i;
for(i = 0; i < p.macro_len; i++) if(name[0] == '&')
if(scmp(p.macros[i].name, name, 0x40)) name = join(scope, '/', name + 1);
return &p.macros[i]; for(i = 0; i < len; i++)
return NULL; if(scmp(list[i].name, name, 0x40))
} return &list[i];
static Label *
findlabel(char *name)
{
int i;
for(i = 0; i < p.label_len; i++)
if(scmp(p.labels[i].name, name, 0x40))
return &p.labels[i];
return NULL; return NULL;
} }
@ -125,19 +86,18 @@ findopcode(char *s)
{ {
int i; int i;
for(i = 0; i < 0x20; i++) { for(i = 0; i < 0x20; i++) {
int m = 0; int m = 3;
if(!scmp(ops[i], s, 3)) if(!scmp(ops[i], s, 3)) continue;
continue; if(!i) i |= (1 << 7);
if(!i) i |= (1 << 7); /* force keep for LIT */ while(s[m]) {
while(s[3 + m]) { if(s[m] == '2')
if(s[3 + m] == '2') i |= (1 << 5);
i |= (1 << 5); /* mode: short */ else if(s[m] == 'r')
else if(s[3 + m] == 'r') i |= (1 << 6);
i |= (1 << 6); /* mode: return */ else if(s[m] == 'k')
else if(s[3 + m] == 'k') i |= (1 << 7);
i |= (1 << 7); /* mode: keep */
else else
return 0; /* failed to match */ return 0;
m++; m++;
} }
return i; return i;
@ -146,395 +106,309 @@ findopcode(char *s)
} }
static int static int
makemacro(char *name, FILE *f) walkcomment(FILE *f, Context *ctx)
{ {
Macro *m; char c;
char word[0x40]; int depth = 1;
if(findmacro(name)) while(f && fread(&c, 1, 1, f)) {
return error_asm("Macro duplicate", name); if(c == 0xa) ctx->line += 1;
if(sihx(name) && slen(name) % 2 == 0) if(c == '(') depth++;
return error_asm("Macro name is hex number", name); if(c == ')' && --depth < 1) return 1;
if(findopcode(name) || scmp(name, "BRK", 4) || !slen(name)) }
return error_asm("Macro name is invalid", name); return 0;
if(p.macro_len == 0x100) }
return error_asm("Macros limit exceeded", name);
m = &p.macros[p.macro_len++]; static int
scpy(name, m->name, 0x40); walkmacro(Item *m, Context *ctx)
while(fscanf(f, "%63s", word) == 1) { {
if(word[0] == '{') continue; char c, *contentptr = m->content, *cptr = token;
if(word[0] == '}') break; while((c = *contentptr++)) {
if(word[0] == '%') if(c < 0x21) {
return error_asm("Macro error", name); *cptr++ = 0x00;
if(m->len >= 0x40) if(token[0] && !parse(token, NULL, ctx)) return 0;
return error_asm("Macro size exceeded", name); cptr = token;
scpy(word, m->items[m->len++], 0x40); } else
*cptr++ = c;
} }
return 1; return 1;
} }
static int static int
isrune(char c) walkfile(FILE *f, Context *ctx)
{ {
char cc, *r = runes; char c, *cptr = token;
while((cc = *r++)) while(f && fread(&c, 1, 1, f)) {
if(c == cc) return 1; if(c == 0xa) ctx->line += 1;
return 0; if(c < 0x21) {
} *cptr++ = 0x00;
if(token[0] && !parse(token, f, ctx))
static int return 0;
makelabel(char *name) cptr = token;
{ } else if(cptr - token < 0x3f)
Label *l; *cptr++ = c;
if(findlabel(name)) else
return error_asm("Label duplicate", name); return error_asm("Token too long");
if(sihx(name) && (slen(name) == 2 || slen(name) == 4)) }
return error_asm("Label name is hex number", name);
if(findopcode(name) || scmp(name, "BRK", 4) || !slen(name))
return error_asm("Label name is invalid", name);
if(isrune(name[0]))
return error_asm("Label name is runic", name);
if(p.label_len == 0x400)
return error_asm("Labels limit exceeded", name);
l = &p.labels[p.label_len++];
l->addr = p.ptr;
l->refs = 0;
scpy(name, l->name, 0x40);
return 1; return 1;
} }
static char * static char *
makelambda(int id) makelambda(int id)
{ {
scpy("lambda", p.lambda, 0x07); lambda[0] = (char)0xce;
p.lambda[6] = '0' + (id >> 0x4); lambda[1] = (char)0xbb;
p.lambda[7] = '0' + (id & 0xf); lambda[2] = hexad[id >> 0x4];
return p.lambda; lambda[3] = hexad[id & 0xf];
return lambda;
} }
static int static int
makereference(char *scope, char *label, char rune, Uint16 addr) makemacro(char *name, FILE *f, Context *ctx)
{ {
char subw[0x40], parent[0x40]; char c;
Reference *r; Item *m;
if(p.refs_len >= 0x1000) if(macro_len >= 0x100) return error_asm("Macros limit exceeded");
return error_asm("References limit exceeded", label); if(isinvalid(name)) return error_asm("Macro is invalid");
r = &p.refs[p.refs_len++]; if(findmacro(name)) return error_asm("Macro is duplicate");
if(label[0] == '{') { m = &macros[macro_len++];
p.lambda_stack[p.lambda_ptr++] = p.lambda_count; m->name = push(name, 0);
scpy(makelambda(p.lambda_count++), r->name, 0x40); m->content = dictnext;
} else if(label[0] == '&' || label[0] == '/') { while(f && fread(&c, 1, 1, f) && c != '{')
if(!sublabel(subw, scope, label + 1)) if(c == 0xa) ctx->line += 1;
return error_asm("Invalid sublabel", label); while(f && fread(&c, 1, 1, f) && c != '}') {
scpy(subw, r->name, 0x40); if(c == 0xa) ctx->line += 1;
} else { if(c == '%') return 0;
int pos = spos(label, '/'); if(c == '(')
if(pos > 0) { walkcomment(f, ctx);
Label *l; else
if((l = findlabel(scpy(label, parent, pos)))) *dictnext++ = c;
l->refs++;
}
scpy(label, r->name, 0x40);
} }
*dictnext++ = 0;
return 1;
}
static int
makelabel(char *name, int setscope, Context *ctx)
{
Item *l;
if(name[0] == '&')
name = join(scope, '/', name + 1);
if(labels_len >= 0x400) return error_asm("Labels limit exceeded");
if(isinvalid(name)) return error_asm("Label is invalid");
if(findlabel(name)) return error_asm("Label is duplicate");
l = &labels[labels_len++];
l->name = push(name, 0);
l->addr = ptr;
l->refs = 0;
if(setscope) {
int i = 0;
while(name[i] != '/' && i < 0x3e && (scope[i] = name[i]))
i++;
scope[i] = '\0';
}
return 1;
}
static int
makeref(char *label, char rune, Uint16 addr)
{
Item *r;
if(refs_len >= 0x1000) return error_top("References limit exceeded", label);
r = &refs[refs_len++];
if(label[0] == '{') {
lambda_stack[lambda_ptr++] = lambda_len;
r->name = push(makelambda(lambda_len++), 0);
} else if(label[0] == '&' || label[0] == '/') {
r->name = join(scope, '/', label + 1);
} else
r->name = push(label, 0);
r->rune = rune; r->rune = rune;
r->addr = addr; r->addr = addr;
return 1; return 1;
} }
static int static int
writebyte(Uint8 b) writepad(char *w)
{ {
if(p.ptr < TRIM) Item *l;
return error_asm("Writing in zero-page", ""); int rel = w[0] == '$' ? ptr : 0;
else if(p.ptr > 0xffff) if(ishex(w + 1)) {
return error_asm("Writing after the end of RAM", ""); ptr = shex(w + 1) + rel;
else if(p.ptr < p.length) return 1;
return error_asm("Memory overwrite", ""); }
p.data[p.ptr++] = b; if((l = findlabel(w + 1))) {
p.length = p.ptr; ptr = l->addr + rel;
return 1;
}
return 0;
}
static int
writebyte(Uint8 b, Context *ctx)
{
if(ptr < PAGE)
return error_asm("Writing in zero-page");
else if(ptr >= 0x10000)
return error_asm("Writing outside memory");
else if(ptr < length)
return error_asm("Writing rewind");
data[ptr++] = b;
if(b)
length = ptr;
return 1; return 1;
} }
static int static int
writeopcode(char *w) writehex(char *w, Context *ctx)
{ {
return writebyte(findopcode(w)); if(*w == '#')
writebyte(findopcode("LIT") | !!(++w)[2] << 5, ctx);
if(!w[2])
return writebyte(shex(w), ctx);
else if(!w[4])
return writeshort(shex(w));
else
return 0;
} }
static int static int
writeshort(Uint16 s, int lit) writestring(char *w, Context *ctx)
{ {
if(lit) char c;
if(!writebyte(findopcode("LIT2"))) return 0; while((c = *(w++)))
return writebyte(s >> 8) && writebyte(s & 0xff); if(!writebyte(c, ctx)) return 0;
return 1;
} }
static int static int
writelitbyte(Uint8 b) assemble(char *filename)
{
return writebyte(findopcode("LIT")) && writebyte(b);
}
static int
doinclude(char *filename)
{ {
FILE *f; FILE *f;
char w[0x40]; int res = 0;
if(!(f = fopen(setlocation(filename), "r"))) Context ctx;
return error_asm("Include missing", filename); ctx.line = 0;
while(fscanf(f, "%63s", w) == 1) ctx.path = push(filename, 0);
if(!parse(w, f)) if(!(f = fopen(filename, "r")))
return error_asm("Unknown token", w); return error_top("Invalid source", filename);
res = walkfile(f, &ctx);
fclose(f); fclose(f);
return 1; return res;
} }
static int static int
parse(char *w, FILE *f) parse(char *w, FILE *f, Context *ctx)
{ {
int i; Item *m;
char word[0x40], subw[0x40], c;
Label *l;
Macro *m;
if(slen(w) >= 63)
return error_asm("Invalid token", w);
switch(w[0]) { switch(w[0]) {
case '(': /* comment */ case '(': return !walkcomment(f, ctx) ? error_asm("Invalid comment") : 1;
if(slen(w) != 1) fprintf(stderr, "-- Malformed comment: %s\n", w); case '%': return !makemacro(w + 1, f, ctx) ? error_asm("Invalid macro") : 1;
i = 1; /* track nested comment depth */ case '@': return !makelabel(w + 1, 1, ctx) ? error_asm("Invalid label") : 1;
while(fscanf(f, "%63s", word) == 1) { case '&': return !makelabel(w, 0, ctx) ? error_asm("Invalid sublabel") : 1;
if(slen(word) != 1) case '}': return !makelabel(makelambda(lambda_stack[--lambda_ptr]), 0, ctx) ? error_asm("Invalid label") : 1;
continue; case '#': return !ishex(w + 1) || !writehex(w, ctx) ? error_asm("Invalid hexadecimal") : 1;
else if(word[0] == '(') case '_': return makeref(w + 1, w[0], ptr) && writebyte(0xff, ctx);
i++; case ',': return makeref(w + 1, w[0], ptr + 1) && writebyte(findopcode("LIT"), ctx) && writebyte(0xff, ctx);
else if(word[0] == ')' && --i < 1) case '-': return makeref(w + 1, w[0], ptr) && writebyte(0xff, ctx);
break; case '.': return makeref(w + 1, w[0], ptr + 1) && writebyte(findopcode("LIT"), ctx) && writebyte(0xff, ctx);
} case ':': fprintf(stderr, "Deprecated rune %s, use =%s\n", w, w + 1); /* fall-through */
break; case '=': return makeref(w + 1, w[0], ptr) && writeshort(0xffff);
case '~': /* include */ case ';': return makeref(w + 1, w[0], ptr + 1) && writebyte(findopcode("LIT2"), ctx) && writeshort(0xffff);
if(!doinclude(w + 1)) case '?': return makeref(w + 1, w[0], ptr + 1) && writebyte(0x20, ctx) && writeshort(0xffff);
return error_asm("Invalid include", w); case '!': return makeref(w + 1, w[0], ptr + 1) && writebyte(0x40, ctx) && writeshort(0xffff);
break; case '"': return !writestring(w + 1, ctx) ? error_asm("Invalid string") : 1;
case '%': /* macro */ case '~': return !assemble(w + 1) ? error_asm("Invalid include") : 1;
if(!makemacro(w + 1, f)) case '$':
return error_asm("Invalid macro", w); case '|': return !writepad(w) ? error_asm("Invalid padding") : 1;
break;
case '|': /* pad-absolute */
if(sihx(w + 1))
p.ptr = shex(w + 1);
else if(w[1] == '&') {
if(!sublabel(subw, p.scope, w + 2) || !(l = findlabel(subw)))
return error_asm("Invalid sublabel", w);
p.ptr = l->addr;
} else {
if(!(l = findlabel(w + 1)))
return error_asm("Invalid label", w);
p.ptr = l->addr;
}
break;
case '$': /* pad-relative */
if(sihx(w + 1))
p.ptr += shex(w + 1);
else if(w[1] == '&') {
if(!sublabel(subw, p.scope, w + 2) || !(l = findlabel(subw)))
return error_asm("Invalid sublabel", w);
p.ptr += l->addr;
} else {
if(!(l = findlabel(w + 1)))
return error_asm("Invalid label", w);
p.ptr += l->addr;
}
break;
case '@': /* label */
if(!makelabel(w + 1))
return error_asm("Invalid label", w);
i = 0;
while(w[i + 1] != '/' && i < 0x3e && (p.scope[i] = w[i + 1]))
i++;
p.scope[i] = '\0';
break;
case '&': /* sublabel */
if(!sublabel(subw, p.scope, w + 1) || !makelabel(subw))
return error_asm("Invalid sublabel", w);
break;
case '#': /* literals hex */
if(sihx(w + 1) && slen(w) == 3)
return writelitbyte(shex(w + 1));
else if(sihx(w + 1) && slen(w) == 5)
return writeshort(shex(w + 1), 1);
else
return error_asm("Invalid hex literal", w);
break;
case '_': /* raw byte relative */
return makereference(p.scope, w + 1, w[0], p.ptr) && writebyte(0xff);
case ',': /* literal byte relative */
return makereference(p.scope, w + 1, w[0], p.ptr + 1) && writelitbyte(0xff);
case '-': /* raw byte absolute */
return makereference(p.scope, w + 1, w[0], p.ptr) && writebyte(0xff);
case '.': /* literal byte zero-page */
return makereference(p.scope, w + 1, w[0], p.ptr + 1) && writelitbyte(0xff);
case ':': fprintf(stderr, "Deprecated rune %s, use =%s\n", w, w + 1);
case '=': /* raw short absolute */
return makereference(p.scope, w + 1, w[0], p.ptr) && writeshort(0xffff, 0);
case ';': /* literal short absolute */
return makereference(p.scope, w + 1, w[0], p.ptr + 1) && writeshort(0xffff, 1);
case '?': /* JCI */
return makereference(p.scope, w + 1, w[0], p.ptr + 1) && writebyte(0x20) && writeshort(0xffff, 0);
case '!': /* JMI */
return makereference(p.scope, w + 1, w[0], p.ptr + 1) && writebyte(0x40) && writeshort(0xffff, 0);
case '"': /* raw string */
i = 0;
while((c = w[++i]))
if(!writebyte(c)) return 0;
break;
case '}': /* lambda end */
if(!makelabel(makelambda(p.lambda_stack[--p.lambda_ptr])))
return error_asm("Invalid label", w);
break;
case '[': case '[':
case ']': case ']': return 1;
if(slen(w) == 1) break; /* else fallthrough */
default:
/* opcode */
if(findopcode(w) || scmp(w, "BRK", 4))
return writeopcode(w);
/* raw byte */
else if(sihx(w) && slen(w) == 2)
return writebyte(shex(w));
/* raw short */
else if(sihx(w) && slen(w) == 4)
return writeshort(shex(w), 0);
/* macro */
else if((m = findmacro(w))) {
for(i = 0; i < m->len; i++)
if(!parse(m->items[i], f))
return 0;
return 1;
} else
return makereference(p.scope, w, ' ', p.ptr + 1) && writebyte(0x60) && writeshort(0xffff, 0);
} }
return 1; if(ishex(w)) return writehex(w, ctx);
if(isopc(w)) return writebyte(findopcode(w), ctx);
if((m = findmacro(w))) return walkmacro(m, ctx);
return makeref(w, ' ', ptr + 1) && writebyte(0x60, ctx) && writeshort(0xffff);
} }
static int static int
resolve(void) resolve(void)
{ {
Label *l; int i, rel;
int i; if(!length) return error_top("Assembly", "Output rom is empty.");
Uint16 a; for(i = 0; i < refs_len; i++) {
for(i = 0; i < p.refs_len; i++) { Item *r = &refs[i], *l = findlabel(r->name);
Reference *r = &p.refs[i]; Uint8 *rom = data + r->addr;
if(!l) return 0;
switch(r->rune) { switch(r->rune) {
case '_': case '_':
case ',': case ',':
if(!(l = findlabel(r->name))) *rom = rel = l->addr - r->addr - 2;
return error_top("Unknown relative reference", r->name); if((Sint8)data[r->addr] != rel)
p.data[r->addr] = (Sint8)(l->addr - r->addr - 2); return error_top("Relative reference is too far", r->name);
if((Sint8)p.data[r->addr] != (l->addr - r->addr - 2))
return error_asm("Relative reference is too far", r->name);
l->refs++;
break; break;
case '-': case '-':
case '.': case '.':
if(!(l = findlabel(r->name))) *rom = l->addr;
return error_top("Unknown zero-page reference", r->name);
p.data[r->addr] = l->addr & 0xff;
l->refs++;
break; break;
case ':': case ':':
case '=': case '=':
case ';': case ';':
if(!(l = findlabel(r->name))) *rom++ = l->addr >> 8, *rom = l->addr;
return error_top("Unknown absolute reference", r->name);
p.data[r->addr] = l->addr >> 0x8;
p.data[r->addr + 1] = l->addr & 0xff;
l->refs++;
break; break;
case '?': case '?':
case '!': case '!':
default: default:
if(!(l = findlabel(r->name))) rel = l->addr - r->addr - 2;
return error_top("Unknown absolute reference", r->name); *rom++ = rel >> 8, *rom = rel;
a = l->addr - r->addr - 2;
p.data[r->addr] = a >> 0x8;
p.data[r->addr + 1] = a & 0xff;
l->refs++;
break; break;
} }
l->refs++;
} }
return 1; return 1;
} }
static int static int
assemble(FILE *f) build(char *rompath)
{
char w[0x40];
p.ptr = 0x100;
scpy("on-reset", p.scope, 0x40);
while(fscanf(f, "%62s", w) == 1)
if(slen(w) > 0x3d || !parse(w, f))
return error_asm("Invalid token", w);
return resolve();
}
static void
review(char *filename)
{ {
int i; int i;
for(i = 0; i < p.label_len; i++) FILE *dst, *dstsym;
if(p.labels[i].name[0] >= 'A' && p.labels[i].name[0] <= 'Z') char *sympath = join(rompath, '.', "sym");
continue; /* Ignore capitalized labels(devices) */ /* rom */
else if(!p.labels[i].refs) if(!(dst = fopen(rompath, "wb")))
fprintf(stdout, "-- Unused label: %s\n", p.labels[i].name); return !error_top("Invalid output file", rompath);
for(i = 0; i < labels_len; i++)
if(labels[i].name[0] - 'A' > 25 && !labels[i].refs)
fprintf(stdout, "-- Unused label: %s\n", labels[i].name);
fwrite(data + PAGE, length - PAGE, 1, dst);
fprintf(stdout, fprintf(stdout,
"Assembled %s in %d bytes(%.2f%% used), %d labels, %d macros.\n", "Assembled %s in %d bytes(%.2f%% used), %d labels, %d macros.\n",
filename, rompath,
p.length - TRIM, length - PAGE,
(p.length - TRIM) / 652.80, (length - PAGE) / 652.80,
p.label_len, labels_len,
p.macro_len); macro_len);
} /* sym */
if(!(dstsym = fopen(sympath, "w")))
static void return !error_top("Invalid symbols file", sympath);
writesym(char *filename) for(i = 0; i < labels_len; i++) {
{ Uint8 hb = labels[i].addr >> 8, lb = labels[i].addr;
int i; char c, d = 0, *name = labels[i].name;
char symdst[0x60]; fwrite(&hb, 1, 1, dstsym);
FILE *fp; fwrite(&lb, 1, 1, dstsym);
if(slen(filename) > 0x60 - 5) while((c = *name++)) fwrite(&c, 1, 1, dstsym);
return; fwrite(&d, 1, 1, dstsym);
fp = fopen(scat(scpy(filename, symdst, slen(filename) + 1), ".sym"), "w");
if(fp != NULL) {
for(i = 0; i < p.label_len; i++) {
Uint8 hb = p.labels[i].addr >> 8, lb = p.labels[i].addr & 0xff;
fwrite(&hb, 1, 1, fp);
fwrite(&lb, 1, 1, fp);
fwrite(p.labels[i].name, slen(p.labels[i].name) + 1, 1, fp);
}
} }
fclose(fp); fclose(dst), fclose(dstsym);
return 1;
} }
int int
main(int argc, char *argv[]) main(int argc, char *argv[])
{ {
FILE *src, *dst; ptr = PAGE;
if(argc == 1) scpy("on-reset", scope, 0x40);
return error_top("usage", "uxnasm [-v] input.tal output.rom"); if(argc == 1) return error_top("usage", "uxnasm [-v] input.tal output.rom");
if(argv[1][0] == '-' && argv[1][1] == 'v') if(scmp(argv[1], "-v", 2)) return !fprintf(stdout, "Uxnasm - Uxntal Assembler, 28 Mar 2024.\n");
return !fprintf(stdout, "Uxnasm - Uxntal Assembler, 7 Mar 2024.\n"); if(!assemble(argv[1]) || !length) return !error_top("Assembly", "Failed to assemble rom.");
if(!(src = fopen(setlocation(argv[1]), "r"))) if(!resolve()) return !error_top("Assembly", "Failed to resolve symbols.");
return !error_top("Invalid input", argv[1]); if(!build(argv[2])) return !error_top("Assembly", "Failed to build rom.");
p.entry = argv[1];
if(!assemble(src))
return !error_top("Assembly", "Failed to assemble rom.");
if(!(dst = fopen(argv[2], "wb")))
return !error_top("Invalid Output", argv[2]);
if(p.length <= TRIM)
return !error_top("Assembly", "Output rom is empty.");
fwrite(p.data + TRIM, p.length - TRIM, 1, dst);
if(!scmp(argv[2], "-", 2)) {
review(argv[2]);
writesym(argv[2]);
}
return 0; return 0;
} }