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-rw-r--r--erts/emulator/beam/beam_load.c190
1 files changed, 74 insertions, 116 deletions
diff --git a/erts/emulator/beam/beam_load.c b/erts/emulator/beam/beam_load.c
index 8df053ae64..cf87e111db 100644
--- a/erts/emulator/beam/beam_load.c
+++ b/erts/emulator/beam/beam_load.c
@@ -89,13 +89,12 @@ typedef struct {
} Label;
/*
- * Type for a operand for a generic instruction.
+ * Type for an operand for a generic instruction.
*/
typedef struct {
unsigned type; /* Type of operand. */
- BeamInstr val; /* Value of operand. */
- Uint bigarity; /* Arity for bignumbers (only). */
+ BeamInstr val; /* Value of operand. */
} GenOpArg;
/*
@@ -471,12 +470,14 @@ static int read_code_header(LoaderState* stp);
static int load_code(LoaderState* stp);
static GenOp* gen_element(LoaderState* stp, GenOpArg Fail, GenOpArg Index,
GenOpArg Tuple, GenOpArg Dst);
-static GenOp* gen_split_values(LoaderState* stp, GenOpArg S, GenOpArg Fail,
+static GenOp* gen_split_values(LoaderState* stp, GenOpArg S,
+ GenOpArg TypeFail, GenOpArg Fail,
GenOpArg Size, GenOpArg* Rest);
static GenOp* gen_select_val(LoaderState* stp, GenOpArg S, GenOpArg Fail,
GenOpArg Size, GenOpArg* Rest);
-static GenOp* gen_select_big(LoaderState* stp, GenOpArg S, GenOpArg Fail,
- GenOpArg Size, GenOpArg* Rest);
+static GenOp* gen_select_literals(LoaderState* stp, GenOpArg S,
+ GenOpArg Fail, GenOpArg Size,
+ GenOpArg* Rest);
static GenOp* const_select_val(LoaderState* stp, GenOpArg S, GenOpArg Fail,
GenOpArg Size, GenOpArg* Rest);
static GenOp* gen_func_info(LoaderState* stp, GenOpArg mod, GenOpArg Func,
@@ -1972,56 +1973,6 @@ load_code(LoaderState* stp)
stp->labels[tmp_op->a[arg].val].patches = ci;
ci++;
break;
- case TAG_q:
- {
- Eterm lit;
-
- lit = stp->literals[tmp_op->a[arg].val].term;
- if (is_big(lit)) {
- Eterm* bigp;
- Eterm *tmp;
- Uint size;
- Uint term_size;
-
- bigp = big_val(lit);
- term_size = bignum_header_arity(*bigp);
- size = TermWords(term_size + 1);
- CodeNeed(size);
- tmp = (Eterm *) (code + ci);
- *tmp++ = *bigp++;
- while (term_size-- > 0) {
- *tmp++ = *bigp++;
- }
- ci +=size;
- } else if (is_float(lit)) {
-#if defined(ARCH_64) && !HALFWORD_HEAP
- CodeNeed(1);
- code[ci++] = float_val(stp->literals[tmp_op->a[arg].val].term)[1];
-#elif HALFWORD_HEAP
- Eterm* fptr;
- Uint size;
- Eterm *tmp;
-
- fptr = float_val(stp->literals[tmp_op->a[arg].val].term)+1;
- size = TermWords(2);
- CodeNeed(size);
- tmp = (Eterm *) (code + ci);
- *tmp++ = *fptr++;
- *tmp = *fptr;
- ci += size;
-#else
- Eterm* fptr;
-
- fptr = float_val(stp->literals[tmp_op->a[arg].val].term)+1;
- CodeNeed(2);
- code[ci++] = *fptr++;
- code[ci++] = *fptr;
-#endif
- } else {
- LoadError0(stp, "literal is neither float nor big");
- }
- }
- break;
default:
LoadError1(stp, "unsupported primitive type '%c'",
tag_to_letter[tmp_op->a[arg].type]);
@@ -2233,11 +2184,12 @@ use_jump_tab(LoaderState* stp, GenOpArg Size, GenOpArg* Rest)
}
/*
- * Predicate to test whether all values in a table are big numbers.
+ * Predicate to test whether all values in a table are either
+ * floats or bignums.
*/
static int
-all_values_are_big(LoaderState* stp, GenOpArg Size, GenOpArg* Rest)
+floats_or_bignums(LoaderState* stp, GenOpArg Size, GenOpArg* Rest)
{
int i;
@@ -2249,9 +2201,6 @@ all_values_are_big(LoaderState* stp, GenOpArg Size, GenOpArg* Rest)
if (Rest[i].type != TAG_q) {
return 0;
}
- if (is_not_big(stp->literals[Rest[i].val].term)) {
- return 0;
- }
if (Rest[i+1].type != TAG_f) {
return 0;
}
@@ -3001,18 +2950,24 @@ gen_select_tuple_arity(LoaderState* stp, GenOpArg S, GenOpArg Fail,
*/
static GenOp*
-gen_split_values(LoaderState* stp, GenOpArg S, GenOpArg Fail,
- GenOpArg Size, GenOpArg* Rest)
+gen_split_values(LoaderState* stp, GenOpArg S, GenOpArg TypeFail,
+ GenOpArg Fail, GenOpArg Size, GenOpArg* Rest)
{
GenOp* op1;
GenOp* op2;
GenOp* label;
- Uint type;
+ GenOp* is_integer;
int i;
ASSERT(Size.val >= 2 && Size.val % 2 == 0);
+ NEW_GENOP(stp, is_integer);
+ is_integer->op = genop_is_integer_2;
+ is_integer->arity = 2;
+ is_integer->a[0] = TypeFail;
+ is_integer->a[1] = S;
+
NEW_GENOP(stp, label);
label->op = genop_label_1;
label->arity = 1;
@@ -3038,15 +2993,13 @@ gen_split_values(LoaderState* stp, GenOpArg S, GenOpArg Fail,
op2->a[2].type = TAG_u;
op2->a[2].val = 0;
- op1->next = label;
- label->next = op2;
- op2->next = NULL;
-
- type = Rest[0].type;
+ /*
+ * Split the list.
+ */
ASSERT(Size.type == TAG_u);
for (i = 0; i < Size.val; i += 2) {
- GenOp* op = (Rest[i].type == type) ? op1 : op2;
+ GenOp* op = (Rest[i].type == TAG_q) ? op2 : op1;
int dst = 3 + op->a[2].val;
ASSERT(Rest[i+1].type == TAG_f);
@@ -3055,13 +3008,36 @@ gen_split_values(LoaderState* stp, GenOpArg S, GenOpArg Fail,
op->arity += 2;
op->a[2].val += 2;
}
+ ASSERT(op1->a[2].val > 0);
+ ASSERT(op2->a[2].val > 0);
/*
- * None of the instructions should have zero elements in the list.
+ * Order the instruction sequence appropriately.
*/
- ASSERT(op1->a[2].val > 0);
- ASSERT(op2->a[2].val > 0);
+ if (TypeFail.val == Fail.val) {
+ /*
+ * select_val L1 S ... (small numbers)
+ * label L1
+ * is_integer Fail S
+ * select_val Fail S ... (bignums)
+ */
+ op1->next = label;
+ label->next = is_integer;
+ is_integer->next = op2;
+ } else {
+ /*
+ * is_integer TypeFail S
+ * select_val L1 S ... (small numbers)
+ * label L1
+ * select_val Fail S ... (bignums)
+ */
+ is_integer->next = op1;
+ op1->next = label;
+ label->next = op2;
+ op1 = is_integer;
+ }
+ op2->next = NULL;
return op1;
}
@@ -3154,8 +3130,9 @@ genopargcompare(GenOpArg* a, GenOpArg* b)
}
/*
- * Generate a select_val instruction. We know that a jump table is not suitable,
- * and that all values are of the same type (integer, atoms, floats; never bignums).
+ * Generate a select_val instruction. We know that a jump table
+ * is not suitable, and that all values are of the same type
+ * (integer or atoms).
*/
static GenOp*
@@ -3169,12 +3146,7 @@ gen_select_val(LoaderState* stp, GenOpArg S, GenOpArg Fail,
NEW_GENOP(stp, op);
op->next = NULL;
- if (Rest[0].type != TAG_q) {
- op->op = genop_i_select_val_3;
- } else {
- ASSERT(is_float(stp->literals[Rest[0].val].term));
- op->op = genop_i_select_float_3;
- }
+ op->op = genop_i_select_val_3;
GENOP_ARITY(op, arity);
op->a[0] = S;
op->a[1] = Fail;
@@ -3199,54 +3171,40 @@ gen_select_val(LoaderState* stp, GenOpArg S, GenOpArg Fail,
return op;
}
-/*
- * Compare function for qsort().
- */
-
-static int
-genbigcompare(GenOpArg* a, GenOpArg* b)
-{
- int val = (int)(b->bigarity - a->bigarity);
-
- return val != 0 ? val : ((int) (a->val - b->val));
-}
-
/*
* Generate a select_val instruction for big numbers.
*/
static GenOp*
-gen_select_big(LoaderState* stp, GenOpArg S, GenOpArg Fail,
+gen_select_literals(LoaderState* stp, GenOpArg S, GenOpArg Fail,
GenOpArg Size, GenOpArg* Rest)
{
GenOp* op;
- int arity = Size.val + 2 + 1;
- int size = Size.val / 2;
+ GenOp* jump;
+ GenOp** prev_next = &op;
+
int i;
- NEW_GENOP(stp, op);
- op->next = NULL;
- op->op = genop_i_select_big_2;
- GENOP_ARITY(op, arity);
- op->a[0] = S;
- op->a[1] = Fail;
for (i = 0; i < Size.val; i += 2) {
+ GenOp* op;
ASSERT(Rest[i].type == TAG_q);
- op->a[i+2] = Rest[i];
- op->a[i+2].bigarity = *big_val(stp->literals[op->a[i+2].val].term);
- op->a[i+3] = Rest[i+1];
- }
- ASSERT(i+2 == arity-1);
- op->a[arity-1].type = TAG_u;
- op->a[arity-1].val = 0;
-
- /*
- * Sort the values in descending arity order.
- */
-
- qsort(op->a+2, size, 2*sizeof(GenOpArg),
- (int (*)(const void *, const void *)) genbigcompare);
+ NEW_GENOP(stp, op);
+ op->op = genop_is_ne_exact_3;
+ op->arity = 3;
+ op->a[0] = Rest[i+1];
+ op->a[1] = S;
+ op->a[2] = Rest[i];
+ *prev_next = op;
+ prev_next = &op->next;
+ }
+
+ NEW_GENOP(stp, jump);
+ jump->next = NULL;
+ jump->op = genop_jump_1;
+ jump->arity = 1;
+ jump->a[0] = Fail;
+ *prev_next = jump;
return op;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-11 20:29:38 +0000