Hello!
1.) The processor_costs structure seems very limited, but seem very
easily to "fill in" but are these costs supposed to be best or worst
case? For instance, many instructions with different sized operands
vary in latency.
Instruction costs are further refined in config/i386.c, ix86_rt
Hello,
I'm a new developer to GCC and have been tasked with building a
machine description for an x86 processor. I have documentation
regarding the pipeline stages, instruction latency, and even a number of
special case optimization possibilities. I have been adding small
changes to i386.
