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by dfawcus
1414 days ago
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The MIPS NUBI ABI from 2005 also proposed this for C: ftp://ftp.linux-mips.org//pub/linux/mips/doc/NUBI/MD00438-2C-NUBIDESC-SPC-00.20.pdf
Section 3.4, page 21:"Arguments: [...] Derived types (structures etc) and non-standard scalar types are passed in a register if and only if their memory- stored image is register-size aligned and fits into a register. [...] All other arguments are passed by reference. The callee must copy the argument if it writes it or takes its address." |
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