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fix python code in SIGNEXTEND opcode #18

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gitglorythegreat wants to merge 1 commit into WTFAcademy:main from gitglorythegreat:main

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gitglorythegreat commented Jun 25, 2024 •

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b == 31时，b 为最高字节位，不需要扩展。
b取 0时，8 * b - 1为-1，明显可以看出原来的代码有错。操作数都是 256 bit，字节位是从 0 到 31，所以应该是8 * (b + 1) - 1。
置1后，需要取余将结果变回 256 bit 非负数。


          fix python code in SIGNEXTEND opcode

98f65bd

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