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Instruction p-code leq
leq i : Comparaison ≤ entre deux valeurs du sommet de la pile.Détails de leq i
L'instruction leq (“LEss or eQuals”) demande que la valeur au sommet de la pile (X) soit de type entier, ainsi que la valeur qui suit (Y). Si ces contraintes sont respectées, ces deux valeurs sont supprimées de la pile, et le résultat de la comparaison ≤ entre Y et X est placé au sommet de la pile.
Retour à la page sur le p-code.
Types de données de l'instruction p-code
Certaines instructions p-code sont suivies d'une lettre qui représente le type de données. Nous pouvons retrouver les types suivants :
- i : entier
- r : réel
- b : booléen
- a : adresse
Par facilité, nous pouvons utiliser les convensions suivantes pour désigner les types :
- N : type numérique, N ∈ {i,r,a}
- T : type quelconque, T ∈ {i,r,a,b}
Liste des instructions p-code
English translation
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Document created the 31/07/2010, last modified the 21/03/2020
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Useful links
GPMachine : Télécharger la dernière version
Compiler Design : R. Wilhelm, et D. Maurer ISDN-10 : 0201422905
References
IHDCB332 - Théorie des langages : Syntaxe et sémantique : PY Schobbens,
Syntaxe et sémantique
(January 2010)Prof. Dr. Dr. h.c. mult. Reinhard Wilhelm :
Compiler Design Lab
(version 30/07/10)
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