82 lines
1.7 KiB
Plaintext
82 lines
1.7 KiB
Plaintext
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Notes:
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lexpr is LHS sub-expression.
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rexpr is RHS sub-expression.
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iconst is generic int value.
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sconst is generic string value
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LABEL(sconst)
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generate code label
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JUMP(sconst)
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jump to global sconst
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JUMPT(lexpr,sconst)
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jump to sconst if INT lexpr<>0
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JUMPF(lexpr,sconst)
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jump to sconst if INT lexpr==0
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JUMPGE(lexpr,rexpr,sconst)
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jump to sconst if INT lexpr>=INT rexpr
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SEQ(lexpr,rexpr)
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execute lexpr, rexpr in any order. results not used.
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MOVE(lexpr,rexpr)
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move lexpr to rexpr. rexpr always a MEM.
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MEM(lexpr)
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contents of mem in lexpr - except for RHS of MOVE.
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LOCAL(iconst)
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address of local var at offset iconst
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GLOBAL(sconst)
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address of global var at sconst
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ARG(iconst)
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address of argument var at offset iconst
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CONST(iconst)
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constant
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CALL(lexpr,rexpr,iconst)
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create argframe of size iconst. eval rexpr and discard result.
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call address in lexpr. destroy argframe.
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RETURN(lexpr,sconst)
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eval INT lexpr into int return reg and jump to sconst
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CAST(lexpr)
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convert FP lexpr to INT.
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NEG,NOT,
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INT unary expressions. lexpr always int. result int.
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AND,OR,EOR,SHL,SHR,ASR,ADD,SUB,MUL,DIV
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INT binary expressions. lexpr and rexpr always int. result int.
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SETEQ,SETNE,SETLT,SETGT,SETLE,SETGE
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INT releational expressions. result '1' if INT lexpr,rexpr comparison
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true else '0'.
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FCALL
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like CALL but result is in FP return reg.
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FRETURN(lexpr)
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like RETURN, but put result into FP return reg. lexpr always FP.
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FCAST(lexpr)
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convert INT lexpr to FP.
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FNEG
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FP unary operators. lexpr always FP, result FP.
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FADD,FSUB,FMUL,FDIV,
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FP binary operators. lexpr, rexpr always FP, result FP
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FSETEQ,FSETNE,FSETLT,FSETGT,FSETLE,FSETGE,
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FP relational operators. lexpr, rexpr always FP. result INT!
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