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A comment on The adder at the heart of Intel's 8087 floating-point chip. Parent comment

Re:The adder at the heart of Intel's 8087 floating-point chip by colejohnson66 on Saturday June 13, 2026 @04:10PM (#48520933)
The ROM used different sized transistors to store two bits per transistor. That's pure analog territory, which most HDLs don't touch.
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Re:The adder at the heart of Intel's 8087 floating-point chip by JdeBP on Saturday June 13, 2026 @04:26PM (#48521098)
And largely irrelevant if the goal is synthesizing something that can be put onto an FPGA to be a workalike for the 8087. It's almost never about synthesizing the exact original hardware to be fabricated. See CPU86 and Zet, for examples:

* https://github.com/nsauzede/cpu86/wiki

* https://github.com/marmolejo/zet

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