Mathieu Desnoyers wrote:
Argh.. Rusty asked to have a simplified version first, and then to implement the "more complex" one on top of it. However, in order to get the reentrancy I need for the markers, I need the complex version of the immediate values. Therefore, you find, in this patchset, the simple version first, and then, the more complex one implemented on top. About this patch header, the initial idea was to use the "Q" and "R" constraints, but, as stated just below, the "q" and "r" constraints are used instead to make sure the REX prefixed opcodes for 1, 2, and 4 bytes immediate values are never used. So the complete header follows the source code, it's just that this paragraph could be clearer.
Then you have it backwards. "Q" and "R" avoid REX prefixes, "q" and "r" DO NOT.
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