ref: c94774a5dfaf3b3f65b1f7382cd26b14057a4401
dir: /femtolisp/attic/trash.c/
value_t prim_types[32];
value_t *prim_sym_addrs[] = {
&int8sym, &uint8sym, &int16sym, &uint16sym, &int32sym, &uint32sym,
&int64sym, &uint64sym, &charsym, &ucharsym, &shortsym, &ushortsym,
&intsym, &uintsym, &longsym, &ulongsym,
&lispvaluesym };
#define N_PRIMSYMS (sizeof(prim_sym_addrs) / sizeof(value_t*))
static value_t cv_type(cvalue_t *cv)
{
if (cv->flags.prim) {
return prim_types[cv->flags.primtype];
}
return cv->type;
}
double t0,t1;
int i;
int32_t i32;
char s8;
ulong_t c8=3;
t0 = clock(); //0.058125017
set_secret_symtag(ulongsym,TAG_UINT32);
set_secret_symtag(int8sym,TAG_INT8);
for(i=0; i < 8000000; i++) {
cnvt_to_int32(&i32, &s8, int8sym);
c8+=c8;
s8+=s8;
}
t1 = clock();
printf("%d. that took %.16f\n", i32, t1-t0);
#define int_converter(type) \
static int cnvt_to_##type(type##_t *i, void *data, value_t type) \
{ \
if (type==int32sym) *i = *(int32_t*)data; \
else if (type==charsym) *i = *(char*)data; \
else if (type==ulongsym) *i = *(ulong*)data; \
else if (type==uint32sym) *i = *(uint32_t*)data; \
else if (type==int8sym) *i = *(int8_t*)data; \
else if (type==uint8sym) *i = *(uint8_t*)data; \
else if (type==int64sym) *i = *(int64_t*)data; \
else if (type==uint64sym) *i = *(uint64_t*)data; \
else if (type==wcharsym) *i = *(wchar_t*)data; \
else if (type==longsym) *i = *(long*)data; \
else if (type==int16sym) *i = *(int16_t*)data; \
else if (type==uint16sym) *i = *(uint16_t*)data; \
else \
return 1; \
return 0; \
}
int_converter(int32)
int_converter(uint32)
int_converter(int64)
int_converter(uint64)
#ifdef BITS64
#define cnvt_to_ulong(i,d,t) cnvt_to_uint64(i,d,t)
#else
#define cnvt_to_ulong(i,d,t) cnvt_to_uint32(i,d,t)
#endif
long intabs(long n)
{
long s = n>>(NBITS-1); // either -1 or 0
return (n^s) - s;
}
value_t fl_inv(value_t b)
{
int_t bi;
int tb;
void *bptr=NULL;
cvalue_t *cv;
if (isfixnum(b)) {
bi = numval(b);
if (bi == 0)
goto inv_error;
else if (bi == 1)
return fixnum(1);
else if (bi == -1)
return fixnum(-1);
return fixnum(0);
}
else if (iscvalue(b)) {
cv = (cvalue_t*)ptr(b);
tb = cv_numtype(cv);
if (tb <= T_DOUBLE)
bptr = cv_data(cv);
}
if (bptr == NULL)
type_error("/", "number", b);
if (tb == T_FLOAT)
return mk_double(1.0/(double)*(float*)bptr);
if (tb == T_DOUBLE)
return mk_double(1.0 / *(double*)bptr);
if (tb == T_UINT64) {
if (*(uint64_t*)bptr > 1)
return fixnum(0);
else if (*(uint64_t*)bptr == 1)
return fixnum(1);
goto inv_error;
}
int64_t b64 = conv_to_int64(bptr, tb);
if (b64 == 0) goto inv_error;
else if (b64 == 1) return fixnum(1);
else if (b64 == -1) return fixnum(-1);
return fixnum(0);
inv_error:
lerror(DivideError, "/: division by zero");
}
static void printstack(value_t *penv, uint32_t envsz)
{
int i;
printf("env=%d, size=%d\n", penv - &Stack[0], envsz);
for(i=0; i < SP; i++) {
printf("%d: ", i);
print(stdout, Stack[i], 0);
printf("\n");
}
printf("\n");
}
// unordered comparison
// not any faster than ordered comparison
// a is a fixnum, b is a cvalue
static value_t equal_num_cvalue(value_t a, value_t b)
{
cvalue_t *bcv = (cvalue_t*)ptr(b);
numerictype_t bt;
if (valid_numtype(bt=cv_numtype(bcv))) {
fixnum_t ia = numval(a);
void *bptr = cv_data(bcv);
if (cmp_eq(&ia, T_FIXNUM, bptr, bt))
return fixnum(0);
}
return fixnum(1);
}
static value_t bounded_equal(value_t a, value_t b, int bound);
static value_t cyc_equal(value_t a, value_t b, ptrhash_t *table);
static value_t bounded_vector_equal(value_t a, value_t b, int bound)
{
size_t la = vector_size(a);
size_t lb = vector_size(b);
if (la != lb) return fixnum(1);
size_t i;
for (i = 0; i < la; i++) {
value_t d = bounded_equal(vector_elt(a,i), vector_elt(b,i), bound-1);
if (d==NIL || numval(d)!=0) return d;
}
return fixnum(0);
}
static value_t bounded_equal(value_t a, value_t b, int bound)
{
value_t d;
compare_top:
if (a == b) return fixnum(0);
if (bound <= 0)
return NIL;
int taga = tag(a);
int tagb = cmptag(b);
switch (taga) {
case TAG_NUM :
case TAG_NUM1:
if (isfixnum(b)) {
return fixnum(1);
}
if (iscvalue(b)) {
return equal_num_cvalue(a, b);
}
return fixnum(1);
case TAG_SYM:
return fixnum(1);
case TAG_VECTOR:
if (isvector(b))
return bounded_vector_equal(a, b, bound);
break;
case TAG_CVALUE:
if (iscvalue(b)) {
cvalue_t *acv=(cvalue_t*)ptr(a), *bcv=(cvalue_t*)ptr(b);
numerictype_t at, bt;
if (valid_numtype(at=cv_numtype(acv)) &&
valid_numtype(bt=cv_numtype(bcv))) {
void *aptr = cv_data(acv);
void *bptr = cv_data(bcv);
if (cmp_eq(aptr, at, bptr, bt))
return fixnum(0);
return fixnum(1);
}
return cvalue_compare(a, b);
}
else if (isfixnum(b)) {
return equal_num_cvalue(b, a);
}
break;
case TAG_BUILTIN:
return fixnum(1);
case TAG_CONS:
if (tagb != TAG_CONS) return fixnum(1);
d = bounded_equal(car_(a), car_(b), bound-1);
if (d==NIL || numval(d) != 0) return d;
a = cdr_(a); b = cdr_(b);
bound--;
goto compare_top;
}
return fixnum(1);
}
static value_t cyc_vector_equal(value_t a, value_t b, ptrhash_t *table)
{
size_t la = vector_size(a);
size_t lb = vector_size(b);
size_t i;
value_t d, xa, xb, ca, cb;
if (la != lb) return fixnum(1);
// first try to prove them different with no recursion
for (i = 0; i < la; i++) {
xa = vector_elt(a,i);
xb = vector_elt(b,i);
if (leafp(xa) || leafp(xb)) {
d = bounded_equal(xa, xb, 1);
if (numval(d)!=0) return d;
}
else if (cmptag(xa) != cmptag(xb)) {
return fixnum(1);
}
}
ca = eq_class(table, a);
cb = eq_class(table, b);
if (ca!=NIL && ca==cb)
return fixnum(0);
eq_union(table, a, b, ca, cb);
for (i = 0; i < la; i++) {
xa = vector_elt(a,i);
xb = vector_elt(b,i);
if (!leafp(xa) && !leafp(xb)) {
d = cyc_equal(xa, xb, table);
if (numval(d)!=0) return d;
}
}
return fixnum(0);
}
static value_t cyc_equal(value_t a, value_t b, ptrhash_t *table)
{
if (a==b)
return fixnum(0);
if (iscons(a)) {
if (iscons(b)) {
value_t aa = car_(a); value_t da = cdr_(a);
value_t ab = car_(b); value_t db = cdr_(b);
int tagaa = cmptag(aa); int tagda = cmptag(da);
int tagab = cmptag(ab); int tagdb = cmptag(db);
value_t d, ca, cb;
if (leafp(aa) || leafp(ab)) {
d = bounded_equal(aa, ab, 1);
if (numval(d)!=0) return d;
}
else if (tagaa != tagab)
return fixnum(1);
if (leafp(da) || leafp(db)) {
d = bounded_equal(da, db, 1);
if (numval(d)!=0) return d;
}
else if (tagda != tagdb)
return fixnum(1);
ca = eq_class(table, a);
cb = eq_class(table, b);
if (ca!=NIL && ca==cb)
return fixnum(0);
eq_union(table, a, b, ca, cb);
d = cyc_equal(aa, ab, table);
if (numval(d)!=0) return d;
return cyc_equal(da, db, table);
}
else {
return fixnum(1);
}
}
else if (isvector(a) && isvector(b)) {
return cyc_vector_equal(a, b, table);
}
return bounded_equal(a, b, 1);
}