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Fix FxRandomPick code generation for floats

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This commit is contained in:
Randy Heit 2016-02-05 22:18:40 -06:00
parent 48dcbabd60
commit c978aa32b1
1 changed files with 10 additions and 11 deletions
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21
src/thingdef/thingdef_expression.cpp
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@ -2145,7 +2145,6 @@ FxExpression *FxRandomPick::Resolve(FCompileContext &ctx)
ExpEmit FxRandomPick::Emit(VMFunctionBuilder *build) ExpEmit FxRandomPick::Emit(VMFunctionBuilder *build)
{ {
#pragma message("FxRandomPick::Emit: Floating point part needs reviewing!")
unsigned i; unsigned i;
assert(choices.Size() > 0); assert(choices.Size() > 0);
@ -2171,6 +2170,14 @@ ExpEmit FxRandomPick::Emit(VMFunctionBuilder *build)
// automatically pick it as the destination register for each case. // automatically pick it as the destination register for each case.
resultreg.Free(build); resultreg.Free(build);
// For floating point results, we need to get a new register, since we can't
// reuse the integer one used to store the random result.
if (ValueType == VAL_Float)
{
resultreg = ExpEmit(build, REGT_FLOAT);
resultreg.Free(build);
}
// Allocate space for the jump table. // Allocate space for the jump table.
size_t jumptable = build->Emit(OP_JMP, 0); size_t jumptable = build->Emit(OP_JMP, 0);
for (i = 1; i < choices.Size(); ++i) for (i = 1; i < choices.Size(); ++i)
@ -2193,8 +2200,7 @@ ExpEmit FxRandomPick::Emit(VMFunctionBuilder *build)
else else
{ {
double val = static_cast<FxConstant *>(choices[i])->GetValue().GetFloat(); double val = static_cast<FxConstant *>(choices[i])->GetValue().GetFloat();
build->Emit(OP_PARAM, 0, REGT_FLOAT | REGT_KONST, build->GetConstantFloat(val)); build->Emit(OP_LKF, resultreg.RegNum, build->GetConstantFloat(val));
build->ParamChange(-1); // all params should use the same register here.
} }
} }
else else
@ -2205,14 +2211,7 @@ ExpEmit FxRandomPick::Emit(VMFunctionBuilder *build)
// was expected. Copy it to the one we wanted. // was expected. Copy it to the one we wanted.
resultreg.Reuse(build); // This is really just for the assert in Reuse() resultreg.Reuse(build); // This is really just for the assert in Reuse()
if (ValueType == VAL_Int) build->Emit(ValueType == VAL_Int ? OP_MOVE : OP_MOVEF, resultreg.RegNum, casereg.RegNum, 0);
{
build->Emit(OP_MOVE, resultreg.RegNum, casereg.RegNum, 0);
}
else
{
build->Emit(OP_MOVEF, resultreg.RegNum, casereg.RegNum, 0);
}
resultreg.Free(build); resultreg.Free(build);
} }
// Free this register so the remaining cases can use it. // Free this register so the remaining cases can use it.