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-rw-r--r--erts/emulator/beam/big.c168
1 files changed, 157 insertions, 11 deletions
diff --git a/erts/emulator/beam/big.c b/erts/emulator/beam/big.c
index 03c88da8c6..ff15d834ab 100644
--- a/erts/emulator/beam/big.c
+++ b/erts/emulator/beam/big.c
@@ -1,19 +1,19 @@
/*
* %CopyrightBegin%
- *
- * Copyright Ericsson AB 1996-2009. All Rights Reserved.
- *
+ *
+ * Copyright Ericsson AB 1996-2010. All Rights Reserved.
+ *
* The contents of this file are subject to the Erlang Public License,
* Version 1.1, (the "License"); you may not use this file except in
* compliance with the License. You should have received a copy of the
* Erlang Public License along with this software. If not, it can be
* retrieved online at http://www.erlang.org/.
- *
+ *
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
- *
+ *
* %CopyrightEnd%
*/
@@ -1459,7 +1459,31 @@ Eterm uint_to_big(Uint x, Eterm *y)
BIG_DIGIT(y, 0) = x;
return make_big(y);
}
+/*
+** convert UWord to bigint
+** (must only be used if x is to big to be stored as a small)
+** Allocation is tricky, the heap need has to be calculated
+** with the macro BIG_UWORD_HEAP_SIZE(x)
+*/
+Eterm uword_to_big(UWord x, Eterm *y)
+{
+#if HALFWORD_HEAP
+ Uint upper = x >> 32;
+ Uint lower = x & 0xFFFFFFFFUL;
+ if (upper == 0) {
+ *y = make_pos_bignum_header(1);
+ } else {
+ *y = make_pos_bignum_header(2);
+ BIG_DIGIT(y, 1) = upper;
+ }
+ BIG_DIGIT(y, 0) = lower;
+#else
+ *y = make_pos_bignum_header(1);
+ BIG_DIGIT(y, 0) = x;
+#endif
+ return make_big(y);
+}
/*
** convert signed int to bigint
@@ -1480,19 +1504,19 @@ Eterm small_to_big(Sint x, Eterm *y)
Eterm erts_uint64_to_big(Uint64 x, Eterm **hpp)
{
Eterm *hp = *hpp;
-#ifdef ARCH_32
+#if defined(ARCH_32) || HALFWORD_HEAP
if (x >= (((Uint64) 1) << 32)) {
*hp = make_pos_bignum_header(2);
BIG_DIGIT(hp, 0) = (Uint) (x & ((Uint) 0xffffffff));
BIG_DIGIT(hp, 1) = (Uint) ((x >> 32) & ((Uint) 0xffffffff));
- *hpp += 2;
+ *hpp += 3;
}
else
#endif
{
*hp = make_pos_bignum_header(1);
BIG_DIGIT(hp, 0) = (Uint) x;
- *hpp += 1;
+ *hpp += 2;
}
return make_big(hp);
}
@@ -1507,7 +1531,7 @@ Eterm erts_sint64_to_big(Sint64 x, Eterm **hpp)
neg = 1;
x = -x;
}
-#ifdef ARCH_32
+#if defined(ARCH_32) || HALFWORD_HEAP
if (x >= (((Uint64) 1) << 32)) {
if (neg)
*hp = make_neg_bignum_header(2);
@@ -1515,7 +1539,7 @@ Eterm erts_sint64_to_big(Sint64 x, Eterm **hpp)
*hp = make_pos_bignum_header(2);
BIG_DIGIT(hp, 0) = (Uint) (x & ((Uint) 0xffffffff));
BIG_DIGIT(hp, 1) = (Uint) ((x >> 32) & ((Uint) 0xffffffff));
- *hpp += 2;
+ *hpp += 3;
}
else
#endif
@@ -1525,7 +1549,7 @@ Eterm erts_sint64_to_big(Sint64 x, Eterm **hpp)
else
*hp = make_pos_bignum_header(1);
BIG_DIGIT(hp, 0) = (Uint) x;
- *hpp += 1;
+ *hpp += 2;
}
return make_big(hp);
}
@@ -1854,6 +1878,87 @@ term_to_Uint(Eterm term, Uint *up)
}
}
+int
+term_to_UWord(Eterm term, UWord *up)
+{
+#if SIZEOF_VOID_P == ERTS_SIZEOF_ETERM
+ return term_to_Uint(term,up);
+#else
+ if (is_small(term)) {
+ Sint i = signed_val(term);
+ if (i < 0) {
+ *up = BADARG;
+ return 0;
+ }
+ *up = (UWord) i;
+ return 1;
+ } else if (is_big(term)) {
+ ErtsDigit* xr = big_v(term);
+ dsize_t xl = big_size(term);
+ UWord uval = 0;
+ int n = 0;
+
+ if (big_sign(term)) {
+ *up = BADARG;
+ return 0;
+ } else if (xl*D_EXP > sizeof(UWord)*8) {
+ *up = SYSTEM_LIMIT;
+ return 0;
+ }
+ while (xl-- > 0) {
+ uval |= ((UWord)(*xr++)) << n;
+ n += D_EXP;
+ }
+ *up = uval;
+ return 1;
+ } else {
+ *up = BADARG;
+ return 0;
+ }
+#endif
+}
+
+int
+term_to_Uint64(Eterm term, Uint64 *up)
+{
+#if SIZEOF_VOID_P == 8
+ return term_to_UWord(term,up);
+#else
+ if (is_small(term)) {
+ Sint i = signed_val(term);
+ if (i < 0) {
+ *up = BADARG;
+ return 0;
+ }
+ *up = (Uint64) i;
+ return 1;
+ } else if (is_big(term)) {
+ ErtsDigit* xr = big_v(term);
+ dsize_t xl = big_size(term);
+ Uint64 uval = 0;
+ int n = 0;
+
+ if (big_sign(term)) {
+ *up = BADARG;
+ return 0;
+ } else if (xl*D_EXP > sizeof(Uint64)*8) {
+ *up = SYSTEM_LIMIT;
+ return 0;
+ }
+ while (xl-- > 0) {
+ uval |= ((Uint64)(*xr++)) << n;
+ n += D_EXP;
+ }
+ *up = uval;
+ return 1;
+ } else {
+ *up = BADARG;
+ return 0;
+ }
+#endif
+}
+
+
int term_to_Sint(Eterm term, Sint *sp)
{
if (is_small(term)) {
@@ -1888,6 +1993,47 @@ int term_to_Sint(Eterm term, Sint *sp)
}
}
+#if HAVE_INT64
+int term_to_Sint64(Eterm term, Sint64 *sp)
+{
+#if ERTS_SIZEOF_ETERM == 8
+ return term_to_Sint(term, sp);
+#else
+ if (is_small(term)) {
+ *sp = signed_val(term);
+ return 1;
+ } else if (is_big(term)) {
+ ErtsDigit* xr = big_v(term);
+ dsize_t xl = big_size(term);
+ int sign = big_sign(term);
+ Uint64 uval = 0;
+ int n = 0;
+
+ if (xl*D_EXP > sizeof(Uint64)*8) {
+ return 0;
+ }
+ while (xl-- > 0) {
+ uval |= ((Uint64)(*xr++)) << n;
+ n += D_EXP;
+ }
+ if (sign) {
+ uval = -uval;
+ if ((Sint64)uval > 0)
+ return 0;
+ } else {
+ if ((Sint64)uval < 0)
+ return 0;
+ }
+ *sp = uval;
+ return 1;
+ } else {
+ return 0;
+ }
+#endif
+}
+#endif /* HAVE_INT64 */
+
+
/*
** Add and subtract
*/