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#include "lisc.h"
typedef struct Vec Vec;
struct Vec {
ulong mag;
size_t esz;
ulong cap;
union {
long long ll;
long double ld;
void *ptr;
} align[];
};
enum {
VMin = 2,
VMag = 0xcabba9e,
};
Typ typ[NTyp];
Ins insb[NIns], *curi;
void
diag(char *s)
{
fputs(s, stderr);
fputc('\n', stderr);
abort();
}
void *
alloc(size_t n)
{
void *p;
if (n == 0)
return 0;
p = calloc(1, n);
if (!p)
abort();
return p;
}
Blk *
balloc()
{
static Blk z;
Blk *b;
b = alloc(sizeof *b);
*b = z;
return b;
}
void
emit(int op, int w, Ref to, Ref arg0, Ref arg1)
{
if (curi == insb)
diag("emit: too many instructions");
*--curi = (Ins){op, w, to, {arg0, arg1}};
}
void
emiti(Ins i)
{
emit(i.op, i.wide, i.to, i.arg[0], i.arg[1]);
}
int
bcnt(Bits *b)
{
int z, i, j;
ulong tmp;
i = 0;
for (z=0; z<BITS; z++) {
tmp = b->t[z];
for (j=0; j<64; j++) {
i += 1 & tmp;
tmp >>= 1;
}
}
return i;
}
void
idup(Ins **pd, Ins *s, ulong n)
{
free(*pd);
*pd = alloc(n * sizeof(Ins));
memcpy(*pd, s, n * sizeof(Ins));
}
Ins *
icpy(Ins *d, Ins *s, ulong n)
{
memcpy(d, s, n * sizeof(Ins));
return d + n;
}
void *
valloc(ulong len, size_t esz)
{
ulong cap;
Vec *v;
v = alloc(len * esz + sizeof(Vec));
v->mag = VMag;
for (cap=VMin; cap<len; cap*=2)
;
v->cap = cap;
v->esz = esz;
return v + 1;
}
void
vgrow(void *vp, ulong len)
{
Vec *v;
void *v1;
v = *(Vec **)vp - 1;
assert(v+1 && v->mag == VMag);
if (v->cap >= len)
return;
v1 = valloc(len, v->esz);
memcpy(v1, v+1, v->cap * v->esz);
free(v);
*(Vec **)vp = v1;
}
Ref
newtmp(char *prfx, Fn *fn)
{
static int n;
int t;
t = fn->ntmp++;
vgrow(&fn->tmp, fn->ntmp);
sprintf(fn->tmp[t].name, "%s%d", prfx, ++n);
fn->tmp[t].spill = -1;
return TMP(t);
}
Ref
getcon(int64_t val, Fn *fn)
{
int c;
for (c=0; c<fn->ncon; c++)
if (fn->con[c].type == CNum && fn->con[c].val == val)
return CON(c);
fn->ncon++;
vgrow(&fn->con, fn->ncon);
fn->con[c] = (Con){.type = CNum, .val = val};
return CON(c);
}
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