29 lines
619 B
Plaintext
29 lines
619 B
Plaintext
lenguaje orga-straight-line
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prgm -> stms
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stms -> stm; stm (s = s1;s2) -> compound
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stms -> stms; stm -> compound
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stm -> id = exp (asignacion) -> assign
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exp -> numero (literal) -> number
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exp -> id (idExp) -> id
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exp -> exp op exp (operacion) -> opexp
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op -> + (suma) -> plus
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op -> - (resta) -> minus
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IR:
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example:
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a = 2 + 2
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=>
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a = 4
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=>
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MOV a, 0x0004
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a = b + 2
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=>
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MOV r1, [b]
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ADD r1, 0x0002
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MOV a, r1
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=>
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MOV r1, [0xf000]
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ADD r1, 0x0002
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MOV 0xf001, r1 |