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Support $countbits (#2287)

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This commit is contained in:
Yossi Nivin
2020-05-10 14:27:22 -04:00
committed by GitHub
parent 070bcddf5a
commit f9a0cf0cff
22 changed files with 441 additions and 9 deletions
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src/V3Number.cpp
+49
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@@ -38,6 +38,9 @@
#define NUM_ASSERT_OP_ARGS3(arg1, arg2, arg3) \
UASSERT((this != &(arg1) && this != &(arg2) && this != &(arg3)), \
"Number operation called with same source and dest");
#define NUM_ASSERT_OP_ARGS4(arg1, arg2, arg3, arg4) \
UASSERT((this != &(arg1) && this != &(arg2) && this != &(arg3) && this != &(arg4)), \
"Number operation called with same source and dest");
#define NUM_ASSERT_LOGIC_ARGS1(arg1) \
UASSERT((!(arg1).isDouble() && !(arg1).isString()), \
@@ -47,6 +50,12 @@
NUM_ASSERT_LOGIC_ARGS1(arg1); \
NUM_ASSERT_LOGIC_ARGS1(arg2);
#define NUM_ASSERT_LOGIC_ARGS4(arg1, arg2, arg3, arg4) \
NUM_ASSERT_LOGIC_ARGS1(arg1); \
NUM_ASSERT_LOGIC_ARGS1(arg2); \
NUM_ASSERT_LOGIC_ARGS1(arg3); \
NUM_ASSERT_LOGIC_ARGS1(arg4);
#define NUM_ASSERT_STRING_ARGS1(arg1) \
UASSERT((arg1).isString(), \
"Number operation called with non-string argument: '" << (arg1) << '"');
@@ -953,6 +962,37 @@ int V3Number::widthMin() const {
return 1; // one bit even if number is == 0
}
uint32_t V3Number::countBits(const V3Number& ctrl) const {
int n = 0;
for (int bit = 0; bit < this->width(); ++bit) {
switch (ctrl.bitIs(0)) {
case '0':
if (bitIs0(bit)) ++n;
break;
case '1':
if (bitIs1(bit)) ++n;
break;
case 'x':
if (bitIsX(bit)) ++n;
break;
case 'z':
if (bitIsZ(bit)) ++n;
break;
}
}
return n;
}
uint32_t V3Number::countBits(const V3Number& ctrl1, const V3Number& ctrl2,
const V3Number& ctrl3) const {
int n = countBits(ctrl1);
if (ctrl2.bitIs(0) != ctrl1.bitIs(0)) n += countBits(ctrl2);
if ((ctrl3.bitIs(0) != ctrl1.bitIs(0)) && (ctrl3.bitIs(0) != ctrl2.bitIs(0))) {
n += countBits(ctrl3);
}
return n;
}
uint32_t V3Number::countOnes() const {
int n = 0;
for (int bit = 0; bit < this->width(); bit++) {
@@ -1095,6 +1135,15 @@ V3Number& V3Number::opRedXnor(const V3Number& lhs) {
return setSingleBits(outc);
}
V3Number& V3Number::opCountBits(const V3Number& expr, const V3Number& ctrl1, const V3Number& ctrl2,
const V3Number& ctrl3) {
NUM_ASSERT_OP_ARGS4(expr, ctrl1, ctrl2, ctrl3);
NUM_ASSERT_LOGIC_ARGS4(expr, ctrl1, ctrl2, ctrl3);
setZero();
m_value[0] = expr.countBits(ctrl1, ctrl2, ctrl3);
opCleanThis();
return *this;
}
V3Number& V3Number::opCountOnes(const V3Number& lhs) {
NUM_ASSERT_OP_ARGS1(lhs);
NUM_ASSERT_LOGIC_ARGS1(lhs);