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by comex
3703 days ago
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Huh, never knew that... but I just tried it and GAS (the version Debian installed as powerpc-linux-gnu-as, at any rate) accepted "lwz %r0, %r5(%r0)". Snatching defeat from the jaws of victory... It would still be a gotcha, but a pretty minor one if messing it up just resulted in an error. I suppose the approach taken by AArch64 and others is preferable, where one register is just completely reserved as constant 0 rather than only in some encodings. |
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