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(uxnasm) Optimized writehex

This commit is contained in:
Devine Lu Linvega 2024-03-26 12:53:06 -07:00
parent a6fb9a22c5
commit a2ed2226f3
1 changed files with 16 additions and 22 deletions
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38
src/uxnasm.c
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@ -252,28 +252,22 @@ writebyte(Uint8 b)
}
static int
writeshort(Uint16 s, int lit)
writeshort(Uint16 s)
{
return (lit ? writebyte(findopcode("LIT2")) : 1) && writebyte(s >> 8) && writebyte(s & 0xff);
return writebyte(s >> 8) && writebyte(s & 0xff);
}
static int
writehex(char *w)
{
if(w[0] == '#') {
if(sihx(w + 1) && slen(w) == 3)
return writebyte(findopcode("LIT")) && writebyte(shex(w + 1));
else if(sihx(w + 1) && slen(w) == 5)
return writeshort(shex(w + 1), 1);
else
return error_asm("Invalid hex literal");
} 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);
}
if(*w == '#')
writebyte(findopcode("LIT") | (slen(++w) > 2) << 5);
if(slen(w) == 2)
return writebyte(shex(w));
else if(slen(w) == 4)
return writeshort(shex(w));
else
return 0;
}
static int
@ -350,7 +344,7 @@ parse(char *w, FILE *f)
case '&': /* sublabel */
return !makelabel(w) ? error_asm("Invalid sublabel") : 1;
case '#': /* literals hex */
return !writehex(w) ? error_asm("Invalid hexadecimal") : 1;
return !sihx(w + 1) || !writehex(w) ? error_asm("Invalid hexadecimal") : 1;
case '_': /* raw byte relative */
return addref(w + 1, w[0], p.ptr) && writebyte(0xff);
case ',': /* literal byte relative */
@ -361,13 +355,13 @@ parse(char *w, FILE *f)
return addref(w + 1, w[0], p.ptr + 1) && writebyte(findopcode("LIT")) && writebyte(0xff);
case ':': fprintf(stderr, "Deprecated rune %s, use =%s\n", w, w + 1);
case '=': /* raw short absolute */
return addref(w + 1, w[0], p.ptr) && writeshort(0xffff, 0);
return addref(w + 1, w[0], p.ptr) && writeshort(0xffff);
case ';': /* literal short absolute */
return addref(w + 1, w[0], p.ptr + 1) && writeshort(0xffff, 1);
return addref(w + 1, w[0], p.ptr + 1) && writebyte(findopcode("LIT2")) && writeshort(0xffff);
case '?': /* JCI */
return addref(w + 1, w[0], p.ptr + 1) && writebyte(0x20) && writeshort(0xffff, 0);
return addref(w + 1, w[0], p.ptr + 1) && writebyte(0x20) && writeshort(0xffff);
case '!': /* JMI */
return addref(w + 1, w[0], p.ptr + 1) && writebyte(0x40) && writeshort(0xffff, 0);
return addref(w + 1, w[0], p.ptr + 1) && writebyte(0x40) && writeshort(0xffff);
case '"': /* raw string */
i = 0;
while((c = w[++i]))
@ -391,7 +385,7 @@ parse(char *w, FILE *f)
return 0;
return 1;
} else
return addref(w, ' ', p.ptr + 1) && writebyte(0x60) && writeshort(0xffff, 0);
return addref(w, ' ', p.ptr + 1) && writebyte(0x60) && writeshort(0xffff);
}
return 1;
}