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-rw-r--r--erts/emulator/beam/arith_instrs.tab11
-rw-r--r--erts/emulator/beam/big.h15
-rw-r--r--erts/emulator/beam/erl_arith.c14
-rw-r--r--erts/emulator/beam/erl_gc.c4
-rw-r--r--erts/emulator/beam/erl_term.h1
-rw-r--r--erts/emulator/beam/external.c2
6 files changed, 26 insertions, 21 deletions
diff --git a/erts/emulator/beam/arith_instrs.tab b/erts/emulator/beam/arith_instrs.tab
index 7c9cd47e28..3db19df3c4 100644
--- a/erts/emulator/beam/arith_instrs.tab
+++ b/erts/emulator/beam/arith_instrs.tab
@@ -51,8 +51,7 @@ plus.fetch(Op1, Op2) {
plus.execute(Fail, Live, Dst) {
if (ERTS_LIKELY(is_both_small(PlusOp1, PlusOp2))) {
Sint i = signed_val(PlusOp1) + signed_val(PlusOp2);
- ASSERT(MY_IS_SSMALL(i) == IS_SSMALL(i));
- if (ERTS_LIKELY(MY_IS_SSMALL(i))) {
+ if (ERTS_LIKELY(IS_SSMALL(i))) {
$Dst = make_small(i);
$NEXT0();
}
@@ -74,8 +73,7 @@ minus.fetch(Op1, Op2) {
minus.execute(Fail, Live, Dst) {
if (ERTS_LIKELY(is_both_small(MinusOp1, MinusOp2))) {
Sint i = signed_val(MinusOp1) - signed_val(MinusOp2);
- ASSERT(MY_IS_SSMALL(i) == IS_SSMALL(i));
- if (ERTS_LIKELY(MY_IS_SSMALL(i))) {
+ if (ERTS_LIKELY(IS_SSMALL(i))) {
$Dst = make_small(i);
$NEXT0();
}
@@ -100,8 +98,7 @@ increment.execute(IncrementVal, Live, Dst) {
increment_val = $IncrementVal;
if (ERTS_LIKELY(is_small(increment_reg_val))) {
Sint i = signed_val(increment_reg_val) + increment_val;
- ASSERT(MY_IS_SSMALL(i) == IS_SSMALL(i));
- if (ERTS_LIKELY(MY_IS_SSMALL(i))) {
+ if (ERTS_LIKELY(IS_SSMALL(i))) {
$Dst = make_small(i);
$NEXT0();
}
@@ -142,7 +139,7 @@ i_int_div(Fail, Live, Op1, Op2, Dst) {
$BIF_ERROR_ARITY_2($Fail, BIF_intdiv_2, op1, op2);
} else if (ERTS_LIKELY(is_both_small(op1, op2))) {
Sint ires = signed_val(op1) / signed_val(op2);
- if (ERTS_LIKELY(MY_IS_SSMALL(ires))) {
+ if (ERTS_LIKELY(IS_SSMALL(ires))) {
$Dst = make_small(ires);
$NEXT0();
}
diff --git a/erts/emulator/beam/big.h b/erts/emulator/beam/big.h
index 48efce20e7..7556205063 100644
--- a/erts/emulator/beam/big.h
+++ b/erts/emulator/beam/big.h
@@ -70,7 +70,20 @@ typedef Uint dsize_t; /* Vector size type */
/* Check for small */
#define IS_USMALL(sgn,x) ((sgn) ? ((x) <= MAX_SMALL+1) : ((x) <= MAX_SMALL))
-#define IS_SSMALL(x) (((x) >= MIN_SMALL) && ((x) <= MAX_SMALL))
+
+/*
+ * It seems that both clang and gcc will generate sub-optimal code
+ * for the more obvious way to write the range check:
+ *
+ * #define IS_SSMALL(x) (((x) >= MIN_SMALL) && ((x) <= MAX_SMALL))
+ *
+ * Note that IS_SSMALL() may be used in the 32-bit emulator with
+ * a Uint64 argument. Therefore, we must test the size of the argument
+ * to ensure that the cast does not discard the high-order 32 bits.
+ */
+#define _IS_SSMALL32(x) (((Uint32) ((((x)) >> (SMALL_BITS-1)) + 1)) < 2)
+#define _IS_SSMALL64(x) (((Uint64) ((((x)) >> (SMALL_BITS-1)) + 1)) < 2)
+#define IS_SSMALL(x) (sizeof(x) == sizeof(Uint32) ? _IS_SSMALL32(x) : _IS_SSMALL64(x))
/* The heap size needed for a bignum */
#define BIG_NEED_SIZE(x) ((x) + 1)
diff --git a/erts/emulator/beam/erl_arith.c b/erts/emulator/beam/erl_arith.c
index f2a3e411ec..b6625db0d3 100644
--- a/erts/emulator/beam/erl_arith.c
+++ b/erts/emulator/beam/erl_arith.c
@@ -114,7 +114,7 @@ BIF_RETTYPE intdiv_2(BIF_ALIST_2)
}
if (is_both_small(BIF_ARG_1,BIF_ARG_2)){
Sint ires = signed_val(BIF_ARG_1) / signed_val(BIF_ARG_2);
- if (MY_IS_SSMALL(ires))
+ if (IS_SSMALL(ires))
BIF_RET(make_small(ires));
}
BIF_RET(erts_int_div(BIF_P, BIF_ARG_1, BIF_ARG_2));
@@ -340,8 +340,7 @@ erts_mixed_plus(Process* p, Eterm arg1, Eterm arg2)
switch ((arg2 & _TAG_IMMED1_MASK) >> _TAG_PRIMARY_SIZE) {
case (_TAG_IMMED1_SMALL >> _TAG_PRIMARY_SIZE):
ires = signed_val(arg1) + signed_val(arg2);
- ASSERT(MY_IS_SSMALL(ires) == IS_SSMALL(ires));
- if (MY_IS_SSMALL(ires)) {
+ if (IS_SSMALL(ires)) {
return make_small(ires);
} else {
hp = HAlloc(p, 2);
@@ -486,8 +485,7 @@ erts_mixed_minus(Process* p, Eterm arg1, Eterm arg2)
switch ((arg2 & _TAG_IMMED1_MASK) >> _TAG_PRIMARY_SIZE) {
case (_TAG_IMMED1_SMALL >> _TAG_PRIMARY_SIZE):
ires = signed_val(arg1) - signed_val(arg2);
- ASSERT(MY_IS_SSMALL(ires) == IS_SSMALL(ires));
- if (MY_IS_SSMALL(ires)) {
+ if (IS_SSMALL(ires)) {
return make_small(ires);
} else {
hp = HAlloc(p, 2);
@@ -1181,8 +1179,7 @@ erts_gc_mixed_plus(Process* p, Eterm* reg, Uint live)
switch ((arg2 & _TAG_IMMED1_MASK) >> _TAG_PRIMARY_SIZE) {
case (_TAG_IMMED1_SMALL >> _TAG_PRIMARY_SIZE):
ires = signed_val(arg1) + signed_val(arg2);
- ASSERT(MY_IS_SSMALL(ires) == IS_SSMALL(ires));
- if (MY_IS_SSMALL(ires)) {
+ if (IS_SSMALL(ires)) {
return make_small(ires);
} else {
if (ERTS_NEED_GC(p, 2)) {
@@ -1349,8 +1346,7 @@ erts_gc_mixed_minus(Process* p, Eterm* reg, Uint live)
switch ((arg2 & _TAG_IMMED1_MASK) >> _TAG_PRIMARY_SIZE) {
case (_TAG_IMMED1_SMALL >> _TAG_PRIMARY_SIZE):
ires = signed_val(arg1) - signed_val(arg2);
- ASSERT(MY_IS_SSMALL(ires) == IS_SSMALL(ires));
- if (MY_IS_SSMALL(ires)) {
+ if (IS_SSMALL(ires)) {
return make_small(ires);
} else {
if (ERTS_NEED_GC(p, 2)) {
diff --git a/erts/emulator/beam/erl_gc.c b/erts/emulator/beam/erl_gc.c
index 8344c164fa..97a1ca915f 100644
--- a/erts/emulator/beam/erl_gc.c
+++ b/erts/emulator/beam/erl_gc.c
@@ -337,7 +337,7 @@ erts_heap_sizes(Process* p)
for (i = num_heap_sizes-1; i >= 0; i--) {
n += 2;
- if (!MY_IS_SSMALL(heap_sizes[i])) {
+ if (!IS_SSMALL(heap_sizes[i])) {
big += BIG_UINT_HEAP_SIZE;
}
}
@@ -352,7 +352,7 @@ erts_heap_sizes(Process* p)
Eterm num;
Sint sz = heap_sizes[i];
- if (MY_IS_SSMALL(sz)) {
+ if (IS_SSMALL(sz)) {
num = make_small(sz);
} else {
num = uint_to_big(sz, bigp);
diff --git a/erts/emulator/beam/erl_term.h b/erts/emulator/beam/erl_term.h
index 842802f8d9..6daf043117 100644
--- a/erts/emulator/beam/erl_term.h
+++ b/erts/emulator/beam/erl_term.h
@@ -270,7 +270,6 @@ _ET_DECLARE_CHECKED(Eterm*,list_val,Wterm)
#define is_byte(x) (((x) & ((~(Uint)0 << (_TAG_IMMED1_SIZE+8)) + _TAG_IMMED1_MASK)) == _TAG_IMMED1_SMALL)
#define is_valid_bit_size(x) (((Sint)(x)) >= 0 && ((x) & 0x7F) == _TAG_IMMED1_SMALL)
#define is_not_valid_bit_size(x) (!is_valid_bit_size((x)))
-#define MY_IS_SSMALL(x) (((Uint) ((((x)) >> (SMALL_BITS-1)) + 1)) < 2)
#define _unchecked_unsigned_val(x) ((x) >> _TAG_IMMED1_SIZE)
_ET_DECLARE_CHECKED(Uint,unsigned_val,Eterm)
#define unsigned_val(x) _ET_APPLY(unsigned_val,(x))
diff --git a/erts/emulator/beam/external.c b/erts/emulator/beam/external.c
index 60cf09dc07..970158933f 100644
--- a/erts/emulator/beam/external.c
+++ b/erts/emulator/beam/external.c
@@ -3115,7 +3115,7 @@ dec_term(ErtsDistExternal *edep,
#if defined(ARCH_64)
*objp = make_small(sn);
#else
- if (MY_IS_SSMALL(sn)) {
+ if (IS_SSMALL(sn)) {
*objp = make_small(sn);
} else {
*objp = small_to_big(sn, hp);
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-28 07:32:07 +0000