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31ef2e7a52
This adds a "default" directive that takes either "rel" or "abs". This sets whether the default mode for simple displacements is RIP-relative (rel) or not (abs). The default without a directive is "abs". Also added is corresponding "rel" and "abs" effective address modifiers to override whatever default is set: [rel label] is RIP-relative [abs label] is not. In default rel mode, [label] defaults to the former, in default abs mode, the latter. Also, segment overrides (note difference from NASM below) are abs regardless of mode, unless explicitly overridden with rel: [fs:label] is always abs [rel fs:label] is always rel However, we have a number of differences from NASM in this handling due to what I feel to be yasm's more sane handling of [dword ...] and [qword ...]. In yasm, these set the displacement size, rather than the address size; the latter is set using a a32/a64 prefix. I feel this is more sane as in 64-bit mode the two can be different in the MovOffs (A0/A1 mov *ax) case. Also, yasm disables default-rel mode if any segment register is used, not just FS or GS as NASM currently does. See modules/arch/x86/tests/riprel1.asm and modules/arch/x86/tests/riprel2.asm for examples, as well as my recent posting to the nasm-devel mailing list on SF. svn path=/trunk/yasm/; revision=1963 |
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| lc3b | ||
| x86 | ||
| Makefile.inc | ||
| yasm_arch.xml | ||