Some compilers (e.g. riscv32) does not handle well complex macros
for logging. Generated code is bigger than expected (e.g. riscv32
code is almost twice bigger than cortex-m code). Use of logging can
lead to unexpected code increase.
To handle that an analysis of the zephyr code base was performed and
it shown that 75-80% of logs are simple strings with 0 arguments
(~45%), one 32 bit argument (~26%) or two 32 bit arguments (~6%).
Given that a set of dedicated macro were created which are applied
to those 3 cases which on 32 bit platform create very simple log
messages without padding or alignment needed.
Such dedicated macros save up to 40% of code (riscv32) and also
executes 30% faster (arm cortex and riscv32).
Signed-off-by: Krzysztof Chruściński <krzysztof.chruscinski@nordicsemi.no>
a68cdb0558