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Fix cast-to-size context-determined sizing, bug828.

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Wilson Snyder 2014-10-17 19:01:04 -04:00
parent b73edc0564
commit bfbca34eb0
3 changed files with 14 additions and 1 deletions
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@ -7,6 +7,8 @@ indicates the contributor was also the author of the fix; Thanks!
**** Fix generate unrolling with function call, bug830. [Steven Slatter]
**** Fix cast-to-size context-determined sizing, bug828. [Geoff Barrett]
* Verilator 3.864 2014-09-21

2
src/V3Width.cpp
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@ -931,7 +931,7 @@ private:
: nodep->findBitDType(width, width, underDtp->numeric()));
nodep->dtypep(newDtp);
// We ignore warnings as that is sort of the point of a cast
iterateCheck(nodep,"Cast LHS",nodep->lhsp(),SELF,FINAL,newDtp,EXTEND_EXP,false);
iterateCheck(nodep,"Cast LHS",nodep->lhsp(),CONTEXT,FINAL,newDtp,EXTEND_EXP,false);
}
if (vup->c()->final()) {
// CastSize not needed once sizes determined

11
test_regress/t/t_math_signed5.v
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@ -26,6 +26,7 @@
reg [5:0] w6_u;
reg [15:0] w16a_u;
reg [15:0] w16_u;
reg [31:0] w32_u;
real r;
reg signed [4:0] bug754_a;
@ -162,6 +163,16 @@
w4_u = (w4_u >> w4_u) ^~ (w4_u >> w4_u);
`checkh(w4_u, 4'b1111);
// bug828
// verilator lint_off WIDTH
w32_u = 32'(signed'({4'b0001,5'b10000}) << 3);
`checkh(w32_u, 32'h0000_0180);
w32_u = 32'(signed'({4'b0011,5'b10000}) << 3);
`checkh(w32_u, 32'h0000_0380);
// verilator lint_on WIDTH
w32_u = 32'(signed'({4'b0011,5'b10000})) << 3; // Check no width warning
`checkh(w32_u, 32'h0000_0380);
if (fail) $stop;
$write("*-* All Finished *-*\n");
$finish;