On Thursday 10 April 2008 01:08:41 Mathieu Desnoyers wrote:Wouldn't it be simlpler to roll DISABLE_IMMEDIATE into this? ie. default y depends on HAVE_IMMEDIATE bool "Immediate value optimization" if EMBEDDED help Immediate values are used as read-mostly variables that are rarely updated. They use code patching to modify the values inscribed in the instruction stream. It provides a way to save precious cache lines that would otherwise have to be used by these variables. It consumes slightly more memory and requires to modify the instruction stream each time a variable is updated. Should really be disabled for embedded systems with read-only text. Cheers, Rusty. --
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