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by mpweiher 1032 days ago
The reason not to define these things is exactly so C can be used as a high-level assembler, and the answer is always “whatever it is that the CPU naturally does”

"Committee did not want to force programmers into writing portably, to preclude the use of C as a “high-level assembler:”

https://www.open-std.org/JTC1/SC22/WG14/www/docs/n897.pdf

p10, line 39

"C code can be portable. "

line 30