Nathan Kurz

Nathan Kurz has asked 10 questions and find answers to 3 problems.

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Nathan Kurz questions

Do the MMX registers always exist in modern processors?
How can I dynamically hint a branch target to an x64 CPU?
How do I write a recursive for-loop "repeat" macro to generate C code with the CPP preprocessor?
Converting positional arguments to named parameters in an R function based on variable name
How do I sum the four 2-bit bitfields in a single 8-bit byte?
How can I write self-modifying code that runs efficiently on modern x64 processors?
Why would identical copies of the same C loop in the same program take significantly but consistently different times to execute?
Does software prefetching allocate a Line Fill Buffer (LFB)?

Nathan Kurz answers

GCC inline assembler, mixing register sizes (x86)
How do I write a recursive for-loop "repeat" macro to generate C code with the CPP preprocessor?
C code preprocessing in Perl