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- added a boolean cast VM instruction.

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Although this already helps a lot with the messed up code generated for comparisons it's not really a solution for this - it still needs a proper implementation to generate efficient code.
This commit is contained in:
Christoph Oelckers 2016-12-01 01:13:53 +01:00
commit 7688e14bec
5 changed files with 43 additions and 21 deletions
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20
src/scripting/codegeneration/codegen.cpp
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@ -758,25 +758,7 @@ ExpEmit FxBoolCast::Emit(VMFunctionBuilder *build)
ExpEmit to(build, REGT_INT);
from.Free(build);
// Preload result with 0.
build->Emit(OP_LI, to.RegNum, 0);
// Check source against 0.
if (from.RegType == REGT_INT)
{
build->Emit(OP_EQ_R, 1, from.RegNum, to.RegNum);
}
else if (from.RegType == REGT_FLOAT)
{
build->Emit(OP_EQF_K, 1, from.RegNum, build->GetConstantFloat(0.));
}
else if (from.RegType == REGT_POINTER)
{
build->Emit(OP_EQA_K, 1, from.RegNum, build->GetConstantAddress(nullptr, ATAG_GENERIC));
}
build->Emit(OP_JMP, 1);
// Reload result with 1 if the comparison fell through.
build->Emit(OP_LI, to.RegNum, 1);
build->Emit(OP_CASTB, to.RegNum, from.RegNum, from.RegType == REGT_INT ? CASTB_I : from.RegType == REGT_FLOAT ? CASTB_F : CASTB_A);
return to;
}
else