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Fix internal error on integer casts, bug374.

This commit is contained in:
Wilson Snyder 2011-08-09 19:56:22 -04:00
parent df1da3dda9
commit f9bbf31d65
3 changed files with 18 additions and 4 deletions
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4
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@ -3,6 +3,10 @@ Revision history for Verilator
The contributors that suggested a given feature are shown in []. [by ...]
indicates the contributor was also the author of the fix; Thanks!
* Verilator 3.821****
**** Fix internal error on integer casts, bug374. [Chandan Egbert]
* Verilator 3.820 2011/07/28
** Support 'real' numbers and related functions.

7
src/V3Width.cpp
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@ -642,10 +642,11 @@ private:
V3Width::widthParamsEdit(nodep->dtypep()); // MAY CHANGE dtypep()
AstBasicDType* basicp = nodep->dtypep()->basicp(); if (!basicp) nodep->v3fatalSrc("Unimplemented: Casting non-simple data type");
nodep->widthSignedFrom(basicp);
AstNode* newp = nodep->lhsp()->unlinkFrBack();
if (!basicp->isDouble() && !newp->isDouble()) {
widthCheck(nodep,"Cast",newp,nodep->width(),nodep->width(),true);
if (!basicp->isDouble() && !nodep->lhsp()->isDouble()) {
// Note widthCheck might modify nodep->lhsp()
widthCheck(nodep,"Cast",nodep->lhsp(),nodep->width(),nodep->width(),true);
}
AstNode* newp = nodep->lhsp()->unlinkFrBack();
if (basicp->numeric() == newp->numeric()) {
newp = newp; // Can just remove cast
} else if (basicp->isDouble() && !newp->isDouble()) {

11
test_regress/t/t_math_real.v
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@ -19,6 +19,8 @@ module t (/*AUTOARG*/
realtime uninit;
initial if (uninit != 0.0) $stop;
sub_cast_bug374 sub (.cyc5(cyc[4:0]), .*);
initial begin
// rtoi truncates
if ($rtoi(36.7) != 36) $stop;
@ -132,5 +134,12 @@ module t (/*AUTOARG*/
$finish;
end
end
endmodule
module sub_cast_bug374(input clk, input [4:0] cyc5);
integer i;
always @(posedge clk) begin
i <= integer'(cyc5);
end
endmodule