| 摘要 |
PURPOSE:To omit a loading process by loading previously plural address constants onto plural base registers respectively and indicating the displacement from the head address of a section shown by the contents of the base register. CONSTITUTION:An object program is divided into sections 3-1, 3-2.... Then head addresses A(P1), A(P2), A(P5) and A(P8) of sections 3-1, 3-2, 3-5 and 3-8 (shown by hatching in the figure) having high possibility to be defined as branching destinations are defined as address constants respectively. These constants are first loaded and held onto registers r1-r4 respectively by a loading/multiple instruction. Then one of above-mentioned registers is indicated among branching instructions. At the same time, a displacement (d) from the head address of the section shown by the contents of the corresponding register. Therefore said sections 3-1-3-8 are regarded as a big section, and the above-mentioned loading instruction can be omitted for the branching within said big section.
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