JPH0594310A - Machine language code preparing method - Google Patents

Abstract

PURPOSE:To prepare the machine language code expected by a user with a compiler by changing and adding the pepared rule of the machine language code prepared with the compiler by the user. CONSTITUTION:An external rule incorporating means 11 confirms the presence or absence of a machine language code preparing rule 13 described by a user, and when there are the rules, the rules are read into a dynamic data area 14. A machine language code preparing means 12 knows whether or not the rules are read at the dynamic data area, from the external rule incorporating means 11, by the fact that the place of the dynamic data area is informed, the referring is performed in the sequence of the dynamic data area 14 and a static data area 15, and the procedure described by the user is converted to the machine language code.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machine language code generation method, and more particularly to a machine language code generation that allows a user to arbitrarily change / add rules for converting a machine language code by a compiler. Regarding the method.

[0002]

2. Description of the Related Art A conventional machine language code generation rule generated by a compiler is composed of a machine language code generation rule incorporated in the compiler and a means for generating a machine language code from the rule. The production rules cannot be changed when the compiler is provided.

[0003]

In the above-described conventional machine language code generation method, means for generating a machine language code by arranging a machine language code generation rule designed at the time of developing a compiler in a static data area. Has generated a machine language code by searching the static data area for a rule corresponding to the procedure written by the user, so that the machine language code expected by the user may not be generated. In addition, after the compiler is provided to the user, if there is a contradiction in the rules for generating the machine language, the user cannot directly correct the inconsistent rule.

[0004]

A machine language code generation method according to the present invention comprises means for storing a machine language code generation rule of a programming language incorporated therein, and a machine language code generation rule read from the outside. It is characterized in that the means for incorporating and the means for generating a machine language code from the machine language code generation rule are executed.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 2 is a block diagram of an apparatus to which an embodiment of the present invention is applied. This apparatus reads externally a machine language code generation rule and incorporates it into an external rule incorporation means 11, a machine language code generation means 12 that generates a machine language code from the machine language code generation rule, and a machine language written by a user. A user-defined machine language code generation rule storage area 13 for storing code generation rules, a dynamic data area 14 for arranging rules read from the outside, and existing rules of the machine language code generation means are arranged. Static data area 15
And a user written procedure storage area 16 for storing the procedure described by the user, and a machine language code storage area 17 output by the machine language code generation means.

FIG. 1 is a flow chart showing the operation of one embodiment of the present invention. The external rule embedding means 11 confirms the presence or absence of the machine code generation rule 13 described by the user (step 21), and if the rule exists, reads the rule into the dynamic data area 14 (step 22). The machine language code generation means 12 knows from the external rule incorporation means 11 whether or not a rule is read in the dynamic data area by being notified of the location of the dynamic data area (step 2).
5) Referring to the dynamic data area 14 and the static data area 15 in this order (steps 26 and 27), the procedure described by the user is converted into a machine language code (step 28).

Next, in this machine language code generation method, a concrete comparison example between the case of the conventional example and the case of this embodiment is shown in FIGS. 3 (a) and 3 (b). When a part of the procedure described by the user is described in the format shown in the block 31, the machine language code 32 is generated in the conventional example. At this time, the user wants to generate a right shift instruction that is faster than the division instruction shown in the machine language code 32. In the case of the conventional example, whether the procedure described by the user is changed and the content itself in the block 31 is continuously changed until the expected machine language code is output, or the current machine language code 32 is satisfied. Either.

However, in this embodiment, if the rule for outputting the machine language code 33 corresponding to the procedure shown in the block 31 is described in the user-defined machine language code generation rule storage area 13, the user can All the descriptions having the meaning in the block 31 included in the described procedure are converted into the machine language code 33.

[0010]

As described above, according to the present invention,
By introducing a machine language generation rule into the compiler to generate a machine language code from the outside, when the compiler generates a machine language code from the procedure described by the user, the generated machine expects the machine language code. If it is not a language code, the user can add a new rule to the compiler so that the compiler can generate the machine language code expected by the user. That is, the user can obtain the expected machine language code without modifying the described procedure. Also, the user can directly change / add and modify the conflicting rules of the compiler.

[Brief description of drawings]

FIG. 1 is a flow chart showing the operation of an embodiment of the present invention.

FIG. 2 is a configuration diagram of an apparatus to which an embodiment of the present invention is applied.

3A and 3B show a procedure described by a user, a meaning of a result generated by a conventional example, and a meaning of a machine language code expected by the user according to an embodiment of the present invention. It is a figure which illustrates.

[Explanation of symbols]

21 Step of judging whether there is a rule defined by the user 22 Step of reading the machine language code generation rule defined by the user 23 Step of writing in the dynamic data area 24 Set the start address of the generation rule written in the dynamic data area Step of storing 25 Step of judging whether it is written in dynamic data area 26 Step of referring to rule of dynamic data area 27 Step of referring to rule of static data area 28 Step of generating machine language code 11 External rule Embedding means 12 Machine language code generation means 13 User defined machine language code generation rule storage area 14 Dynamic data area 15 Static data area 16 User description procedure storage area 17 Machine language code storage area

Claims (1)

[Claims] 1. A means for storing a machine language code generation rule of a programming language incorporated therein, a means for reading a machine language code generation rule from the outside and incorporating it inside, and a machine language code from the machine language code generation rule. And a means for generating a machine language code generating method.