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Make V3Number::setMask to refactor some code

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git-svn-id: file://localhost/svn/verilator/trunk/verilator@900 77ca24e4-aefa-0310-84f0-b9a241c72d87
This commit is contained in:
Wilson Snyder 2007-03-09 15:18:56 +00:00
parent 78997ee13c
commit e7280d7237
5 changed files with 11 additions and 12 deletions
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5
src/V3Clean.cpp
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@ -104,11 +104,8 @@ private:
nodep->unlinkFrBack(&relinkHandle);
//
computeCppWidth(nodep);
V3Number zero (nodep->fileline(), nodep->widthMin(),0);
V3Number masksmall (nodep->fileline(), nodep->widthMin());
masksmall.opNot(zero);
V3Number mask (nodep->fileline(), cppWidth(nodep));
mask.opAssign(masksmall);
mask.setMask(nodep->widthMin());
AstNode* cleanp = new AstAnd (nodep->fileline(),
new AstConst (nodep->fileline(), mask),
nodep);

7
src/V3Const.cpp
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@ -246,9 +246,8 @@ private:
replaceNum(nodep, 0); nodep=NULL;
}
void replaceAllOnes (AstNode* nodep) {
V3Number num (nodep->fileline(), nodep->width(), 0);
V3Number ones (nodep->fileline(), nodep->width());
ones.opNot(num);
V3Number ones (nodep->fileline(), nodep->width(), 0);
ones.setMask(nodep->width());
replaceNum(nodep, ones); nodep=NULL;
}
void replaceConst(AstNodeUniop* nodep) {
@ -388,7 +387,7 @@ private:
AstNode* newp;
V3Number mask1 (nodep->fileline(), nodep->width());
V3Number ones (nodep->fileline(), nodep->width());
ones.opNot(mask1);
ones.setMask(nodep->width());
if (shift1<0) {
mask1.opShiftR(ones,V3Number(nodep->fileline(),VL_WORDSIZE,-shift1));
} else {

5
src/V3Expand.cpp
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@ -65,11 +65,8 @@ private:
if (nodep->isWide()) {
return V3Number (nodep->fileline(), VL_WORDSIZE, VL_MASK_I(nodep->widthMin()));
} else {
V3Number zero (nodep->fileline(), nodep->widthMin(),0);
V3Number masksmall (nodep->fileline(), nodep->widthMin());
masksmall.opNot(zero);
V3Number mask (nodep->fileline(), longOrQuadWidth(nodep));
mask.opAssign(masksmall);
mask.setMask(nodep->widthMin());
return mask;
}
}

5
src/V3Number.cpp
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@ -296,6 +296,11 @@ V3Number& V3Number::setAllBitsZ() {
for (int i=0; i<words(); i++) { m_value[i]=0; m_valueX[i] = ~0; }
return *this;
}
V3Number& V3Number::setMask(int nbits) {
setZero();
for (int bit=0; bit<nbits; bit++) { setBit(bit,1); }
return *this;
}
//======================================================================
// ACCESSORS

1
src/V3Number.h
View File

@ -108,6 +108,7 @@ public:
// SETTERS
V3Number& setAllBitsX();
V3Number& setAllBitsZ();
V3Number& setMask(int nbits); // IE if nbits=1, then 0b1, if 2->0b11, if 3->0b111 etc
// ACCESSORS
string ascii(bool prefixed=true, bool cleanVerilog=false) const;