Started implementing macros
This commit is contained in:
neauoire
parent
0450ed7fe7
commit
3280c2031b
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@ -74,6 +74,14 @@ RTS
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- Jump helpers
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- Don't brk when return stack is not zeroed
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- LDRS should load from the zeropage?
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- Keep ref counts in macros
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### Macros
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```
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&RTS { RSW JMP }
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&JSR { PRG WSR JMP }
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```
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## Notes
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234
assembler.c
234
assembler.c
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@ -16,6 +16,11 @@ typedef signed char Sint8;
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typedef unsigned short Uint16;
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typedef signed short Sint16;
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typedef struct {
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char name[64], items[16][64];
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Uint8 len;
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} Macro;
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typedef struct {
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char name[64];
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unsigned int size;
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@ -29,9 +34,10 @@ typedef struct {
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} Label;
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typedef struct {
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Uint8 data[256 * 256], llen;
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Uint8 data[256 * 256], llen, mlen;
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Uint16 ptr;
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Label labels[256];
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Macro macros[256];
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} Program;
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Program p;
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@ -42,7 +48,7 @@ char ops[][4] = {
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"BRK", "NOP", "LIT", "LDR", "STR", "JMP", "JSR", "RTS",
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"EQU", "NEQ", "GTH", "LTH", "AND", "XOR", "ROL", "ROR",
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"POP", "DUP", "SWP", "OVR", "ROT", "---", "WSR", "RSW",
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"ADD", "SUB", "MUL", "DIV", "---", "---", "---", "---"
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"ADD", "SUB", "MUL", "DIV", "---", "---", "---", "PRG"
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};
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int scin(char *s, char c) { int i = 0; while(s[i]) if(s[i++] == c) return i - 1; return -1; } /* string char index */
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@ -82,6 +88,16 @@ pushtext(char *s, int lit)
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while((c = s[i++])) pushbyte(c, 0);
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}
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Macro *
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findmacro(char *name)
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{
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int i;
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for(i = 0; i < p.mlen; ++i)
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if(scmp(p.macros[i].name, name, 64))
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return &p.macros[i];
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return NULL;
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}
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Label *
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findlabel(char *s)
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{
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@ -166,6 +182,28 @@ error(char *name, char *id)
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return 0;
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}
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int
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makemacro(char *name, FILE *f)
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{
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Macro *m;
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char word[64];
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if(findmacro(name))
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return error("Macro duplicate", name);
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if(sihx(name) && slen(name) % 2 == 0)
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return error("Macro name is hex number", name);
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if(findopcode(name))
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return error("Macro name is invalid", name);
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m = &p.macros[p.mlen++];
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scpy(name, m->name, 64);
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while(fscanf(f, "%s", word)) {
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if(word[0] == '{') continue;
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if(word[0] == '}') break;
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scpy(word, m->items[m->len++], 64);
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}
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printf("New macro: %s(%d items)\n", m->name, m->len);
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return 1;
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}
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int
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makelabel(char *name, Uint16 addr)
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{
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@ -197,8 +235,7 @@ makevariable(char *name, Uint16 *addr, FILE *f)
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if(word[0] == '}') break;
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scpy(word, l->map[l->maps].name, 64);
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fscanf(f, "%u", &l->map[l->maps].size);
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*addr += l->map[l->maps].size;
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l->maps++;
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*addr += l->map[l->maps++].size;
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}
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return 1;
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}
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@ -215,6 +252,119 @@ skipblock(char *w, int *cap, char a, char b)
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return 0;
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}
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int
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walktoken(char *w)
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{
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Macro *m;
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if((m = findmacro(w))) {
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int i, res = 0;
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for(i = 0; i < m->len; ++i)
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res += walktoken(m->items[i]);
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return res;
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}
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if(findopcode(w) || scmp(w, "BRK", 4))
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return 1;
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switch(w[0]) {
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case '=': return 4; /* STR helper (lit addr-hb addr-lb str) */
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case '~': return 4; /* LDR helper (lit addr-hb addr-lb ldr) */
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case ',': return 3; /* lit2 addr-hb addr-lb */
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case '.': return 2; /* addr-hb addr-lb */
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case '^': return 2; /* Relative jump: lit addr-offset */
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case '+': /* signed positive */
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case '-': /* signed negative */
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case '#': return (slen(w + 1) == 2 ? 2 : 3);
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}
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return error("Unknown label in first pass", w);
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}
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int
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parsetoken(char *w)
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{
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Uint8 op = 0;
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Label *l;
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Macro *m;
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if(w[0] == '^' && (l = findlabel(w + 1))) {
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int off = l->addr - p.ptr - 3;
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if(off < -126 || off > 126) {
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printf("Address %s is too far(%d).\n", w, off);
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return 0;
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}
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pushbyte((Sint8)(l->addr - p.ptr - 3), 1);
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l->refs++;
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return 1;
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}
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if(w[0] == '=' && (l = findlabel(w + 1))) {
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if(!findlabellen(w + 1) || findlabellen(w + 1) > 2)
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return error("Invalid load helper", w);
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pushshort(findlabeladdr(w + 1), 1);
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pushbyte(findopcode(findlabellen(w + 1) == 2 ? "STR2" : "STR"), 0);
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l->refs++;
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return 1;
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}
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if(w[0] == '~' && (l = findlabel(w + 1))) {
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if(!findlabellen(w + 1) || findlabellen(w + 1) > 2)
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return error("Invalid load helper", w);
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pushshort(findlabeladdr(w + 1), 1);
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pushbyte(findopcode(findlabellen(w + 1) == 2 ? "LDR2" : "LDR"), 0);
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l->refs++;
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return 1;
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}
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if((op = findopcode(w)) || scmp(w, "BRK", 4)) {
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pushbyte(op, 0);
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return 1;
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}
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if(w[0] == '.' && (l = findlabel(w + 1))) {
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pushshort(findlabeladdr(w + 1), 0);
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l->refs++;
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return 1;
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}
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if(w[0] == ',' && (l = findlabel(w + 1))) {
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pushshort(findlabeladdr(w + 1), 1);
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l->refs++;
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return 1;
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}
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if(w[0] == '#' && sihx(w + 1)) {
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if(slen(w + 1) == 2)
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pushbyte(shex(w + 1), 1);
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else if(slen(w + 1) == 4)
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pushshort(shex(w + 1), 1);
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else
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return 0;
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return 1;
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}
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if(w[0] == '+' && sihx(w + 1)) {
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if(slen(w + 1) == 2)
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pushbyte((Sint8)shex(w + 1), 1);
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else if(slen(w + 1) == 4)
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pushshort((Sint16)shex(w + 1), 1);
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else
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return 0;
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}
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if(w[0] == '-' && sihx(w + 1)) {
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if(slen(w + 1) == 2)
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pushbyte((Sint8)(shex(w + 1) * -1), 1);
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else if(slen(w + 1) == 4)
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pushshort((Sint16)(shex(w + 1) * -1), 1);
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else
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return 0;
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return 1;
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}
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if((m = findmacro(w))) {
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int i, res = 0;
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for(i = 0; i < m->len; ++i) {
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if(!parsetoken(m->items[i]))
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return 0;
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}
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return 1;
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}
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return 0;
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}
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int
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pass1(FILE *f)
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{
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@ -231,6 +381,10 @@ pass1(FILE *f)
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addr += slen(w) == 4 ? 2 : 1;
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else
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addr += slen(w);
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} else if(w[0] == '%') {
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if(!makemacro(w + 1, f))
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return error("Pass1 failed", w);
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scpy(w + 1, scope, 64);
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} else if(w[0] == '@') {
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if(!makelabel(w + 1, addr))
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return error("Pass1 failed", w);
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@ -241,25 +395,12 @@ pass1(FILE *f)
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} else if(w[0] == ';') {
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if(!makevariable(w + 1, &addr, f))
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return error("Pass1 failed", w);
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} else if(findopcode(w) || scmp(w, "BRK", 4))
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addr += 1;
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else {
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switch(w[0]) {
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case '|':
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if(shex(w + 1) < addr)
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return error("Memory Overlap", w);
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addr = shex(w + 1);
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break;
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case '=': addr += 4; break; /* STR helper (lit addr-hb addr-lb str) */
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case '~': addr += 4; break; /* LDR helper (lit addr-hb addr-lb ldr) */
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case ',': addr += 3; break;
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case '.': addr += 2; break;
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case '^': addr += 2; break; /* Relative jump: lit addr-offset */
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case '+': /* signed positive */
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case '-': /* signed negative */
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case '#': addr += (slen(w + 1) == 2 ? 2 : 3); break;
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default: return error("Unknown label in first pass", w);
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}
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} else if(w[0] == '|') {
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if(shex(w + 1) < addr)
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return error("Memory Overwrite", w);
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addr = shex(w + 1);
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} else {
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addr += walktoken(w);
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}
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}
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rewind(f);
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@ -273,52 +414,33 @@ pass2(FILE *f)
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char w[64], scope[64], subw[64];
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printf("Pass 2\n");
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while(fscanf(f, "%s", w) == 1) {
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Uint8 op = 0;
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Label *l;
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if(w[0] == ';') continue;
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if(w[0] == '$') continue;
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if(w[0] == '%') continue;
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if(skipblock(w, &ccmnt, '(', ')')) continue;
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if(skipblock(w, &ctemplate, '{', '}')) continue;
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if(w[0] == '|') {
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p.ptr = shex(w + 1);
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continue;
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}
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if(w[0] == '@') {
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scpy(w + 1, scope, 64);
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continue;
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}
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if(w[1] == '$') {
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sublabel(subw, scope, w + 2);
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scpy(subw, w + 1, 64);
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scpy(sublabel(subw, scope, w + 2), w + 1, 64);
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}
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/* clang-format off */
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if(skipblock(w, &cbits, '[', ']')) {
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if(w[0] == '[' || w[0] == ']') { continue; }
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if(slen(w) == 4 && sihx(w)) pushshort(shex(w), 0);
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else if(slen(w) == 2 && sihx(w)) pushbyte(shex(w), 0);
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else pushtext(w, 0);
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if(slen(w) == 4 && sihx(w))
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pushshort(shex(w), 0);
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else if(slen(w) == 2 && sihx(w))
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pushbyte(shex(w), 0);
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else
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pushtext(w, 0);
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} else if(!parsetoken(w)) {
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return error("Unknown label in second pass", w);
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}
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else if(w[0] == '^' && (l = findlabel(w + 1))) {
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int off = l->addr - p.ptr - 3;
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if(off < -126 || off > 126){ printf("Address %s is too far(%d).\n", w, off); return 0; }
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pushbyte((Sint8)(l->addr - p.ptr - 3), 1); l->refs++;
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}
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else if(w[0] == '=' && (l = findlabel(w + 1))) {
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if(!findlabellen(w + 1) || findlabellen(w + 1) > 2)
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return error("Invalid load helper", w);
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pushshort(findlabeladdr(w + 1), 1); pushbyte(findopcode(findlabellen(w + 1) == 2 ? "STR2" : "STR"), 0); l->refs++;}
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else if(w[0] == '~' && (l = findlabel(w + 1))) {
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if(!findlabellen(w + 1) || findlabellen(w + 1) > 2)
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return error("Invalid load helper", w);
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pushshort(findlabeladdr(w + 1), 1); pushbyte(findopcode(findlabellen(w + 1) == 2 ? "LDR2" : "LDR"), 0); l->refs++;}
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else if(w[0] == '|') p.ptr = shex(w + 1);
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else if((op = findopcode(w)) || scmp(w, "BRK", 4)) pushbyte(op, 0);
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else if(w[0] == '.' && (l = findlabel(w + 1))) { pushshort(findlabeladdr(w + 1), 0); l->refs++; }
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else if(w[0] == ',' && (l = findlabel(w + 1))) { pushshort(findlabeladdr(w + 1), 1); l->refs++; }
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else if(w[0] == '#' && sihx(w + 1) && slen(w + 1) == 2) pushbyte(shex(w + 1), 1);
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else if(w[0] == '#' && sihx(w + 1) && slen(w + 1) == 4) pushshort(shex(w + 1), 1);
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else if(w[0] == '+' && sihx(w + 1) && slen(w + 1) == 2) pushbyte((Sint8)shex(w + 1), 1);
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else if(w[0] == '+' && sihx(w + 1) && slen(w + 1) == 4) pushshort((Sint16)shex(w + 1), 1);
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else if(w[0] == '-' && sihx(w + 1) && slen(w + 1) == 2) pushbyte((Sint8)(shex(w + 1) * -1), 1);
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else if(w[0] == '-' && sihx(w + 1) && slen(w + 1) == 4) pushshort((Sint16)(shex(w + 1) * -1), 1);
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else return error("Unknown label in second pass", w);
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/* clang-format on */
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}
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return 1;
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}
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@ -1,9 +1,12 @@
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( tests/jump )
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|0100 @RESET
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%RTS { RSW2 JMP }
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%JSR2 { PRG WSR2 JMP2 }
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%JMC { JMP2? POP2 }
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|0100 @RESET
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,test1 JSR2
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,test2 JSR2
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BRK
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@ -23,7 +26,7 @@ BRK
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#33 =Console.byte
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,skip1 #12 #34 LTH JMP2? POP2
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,skip1 #12 #34 LTH JMC
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#ff =Console.byte
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@skip1
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@ -48,7 +51,6 @@ RTS
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@end
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^label1 JMPS
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RTS
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|c000 @FRAME
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@ -1,41 +1,46 @@
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( hello world )
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( Loop )
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&Console { pad 8 char 1 byte 1 short 2 }
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;a 1 ;b 1 ;c 1
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;a { byte 1 } ;b { byte 1 } ;c { byte 1 }
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|0100 @RESET
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( type: padded muljmp )
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@part1
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,type1 JSR2
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,type2 JSR2
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,type3 JSR2
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BRK
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@type1 ( type: padded muljmp )
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$loop NOP
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~a #01 ADD =a
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~a #d0 LTH ^$loop MUL JMPS
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~a =Console.byte
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( type: jmppop )
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RTS
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@part2
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@type2 ( type: jmppop )
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$loop
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~b #01 ADD =b
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,$loop ~b #d0 LTH JMP2? POP2
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~b =Console.byte
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( type: padded jmppop )
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RTS
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@type3 ( type: padded jmppop )
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@part3
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$loop NOP
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~c #01 ADD =c
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~c #d0 LTH ^$loop SWP JMPS? POP
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~c =Console.byte
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~a =dev/console.byte
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~b =dev/console.byte
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~c =dev/console.byte
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BRK
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RTS
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|c000 @FRAME
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|d000 @ERROR
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|FF00 ;dev/console Console
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|FF00 ;Console { pad 8 char 1 byte 1 short 2 }
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|FFF0 .RESET .FRAME .ERROR ( vectors )
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|FFF8 [ 13fd 1ef3 1bf2 ] ( palette )
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3
uxn.c
3
uxn.c
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@ -34,6 +34,7 @@ void op_brk(Uxn *u) { setflag(&u->status, FLAG_HALT, 1); }
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void op_lit(Uxn *u) { u->literal += 1; }
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void op_nop(Uxn *u) { (void)u; }
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void op_jmp(Uxn *u) { Uint8 a = pop8(&u->wst); u->ram.ptr += getflag(&u->status, FLAG_SIGN) ? (Sint8)a : a; }
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void op_prg(Uxn *u) { push16(&u->wst, u->ram.ptr); }
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void op_jsr(Uxn *u) { Uint8 a = pop8(&u->wst); push16(&u->rst, u->ram.ptr); u->ram.ptr += getflag(&u->status, FLAG_SIGN) ? (Sint8)a : a; }
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void op_rts(Uxn *u) { u->ram.ptr = pop16(&u->rst); }
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void op_ldr(Uxn *u) { Uint16 a = pop16(&u->wst); push8(&u->wst, mempeek8(u, a)); }
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@ -95,7 +96,7 @@ void (*ops[])(Uxn *u) = {
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op_pop, op_dup, op_swp, op_ovr, op_rot, op_nop, op_wsr, op_rsw,
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op_add, op_sub, op_mul, op_div, op_nop, op_nop, op_nop, op_nop,
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/* 16-bit */
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op_brk, op_nop16, op_lit16, op_ldr16, op_str16, op_jmp16, op_jsr16, op_rts,
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op_brk, op_nop16, op_lit16, op_ldr16, op_str16, op_jmp16, op_jsr16, op_rts,
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op_equ16, op_neq16, op_gth16, op_lth16, op_and16, op_xor16, op_rol16, op_ror16,
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op_pop16, op_dup16, op_swp16, op_ovr16, op_rot16, op_nop, op_wsr16, op_rsw16,
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op_add16, op_sub16, op_mul16, op_div16, op_nop, op_nop, op_nop, op_nop
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|
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Loading…
Reference in New Issue