On Mon, Jan 19, 2015 at 07:54:22AM +1200, Linus Torvalds wrote: > Why? > > The 8- and 16- bit versions are the same as the 32-bit one. This seems > pointless. If you want something where the sign is in bit 3, they all > return the same value, just the return type differs, but that's really a > *caller* thing, no? Even for the 8bit ones? Since we have the *H and *L register we have more 8 bit regs than we have 16/32 bit regs and it might just be worth it. Since these are inlines the whole calling convention which would clobber the whole of eax can go away. Now granted, this is all very tenuous at best. A more convincing argument might be that of documentation; calling sign_extend32() on something you know to be a byte might be less intuitive. -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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