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ORCA-C
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Eliminate an unnecessary instruction in quad-to-word conversion. 

The TAY instruction would set the flags, but that is unnecessary because pc_cnv is a "NeedsCondition" operation (and some other conversions also do not reliably set the flags).

The code is also changed to preserve the Y register, possibly facilitating register optimizations.
This commit is contained in:
Stephen Heumann 2022-07-09 21:48:56 -05:00
parent 4470626ade
commit 2dff68e6ae
1 changed files with 4 additions and 5 deletions
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9
Gen.pas
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@ -1939,15 +1939,14 @@ else if op^.q = realToUQuad then begin
else if op^.q in [quadToWord,uquadToWord,quadToUWord,uquadToUWord] then begin
GenImplied(m_pla);
GenImplied(m_plx);
GenImplied(m_ply);
GenImplied(m_ply);
GenImplied(m_tay);
GenImplied(m_plx);
GenImplied(m_plx);
end {else if}
else if op^.q in [quadToUByte,uquadToUByte] then begin
GenImplied(m_pla);
GenImplied(m_plx);
GenImplied(m_ply);
GenImplied(m_ply);
GenImplied(m_plx);
GenImplied(m_plx);
GenNative(m_and_imm, immediate, $00FF, nil, 0);
end {else if}
else if op^.q in [quadToByte,uquadToByte] then begin