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DO and LOOP now only compile words from stable ABI, which make them suitable for xcomp. This will greatly simplify driver writing and allow us to mostly avoid the low/high divide in drivers. LEAVE is still xcomp-incompatible though. This make us very very tight for "<0x100" limit for literal words. Hopefully, we won't need more stuff in that area of the binary...
17 lines
630 B
Plaintext
17 lines
630 B
Plaintext
2. Immediate words that have been cross compiled *cannot* be
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used. Only immediates from the host system can be used.
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3. If an immediate word compiles words, it can only be words
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that are part of the stable ABI.
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All of this is because when cross compiling, all atom ref-
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erences are offsetted to the target system and are thus
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unusable directly. For the same reason, any reference to a word
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in the host system will obviously be wrong in the target
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system. More details in B260.
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These rules result in some practicals do's and dont's:
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1. No LEAVE in DO..LOOP
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(cont.)
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