raja.saleru@xxxxxxxxxxxxxx writes: > How can I split the below assembly line using define_split RTL template > <1> rd = dps > > into the below two liens > > <2> > rd = dps > rd = signext(rdhl) > > Here rd is 40-bit register > dps is 32-bit register contains the address > > Here register name can be r1, r2 ... rd. and > dp1, dp2, .....dps > > sigext(rdhl) is the sign extending from 32-bit to 40bit. The details are going to depend on your target. The first step is to figure out the RTL for instructions <1> and <2> above. Then write a define_split which matches the RTL for instruction <1> and produces the RTL for instruction <2>. It's hard to be more helpful without more details. There are hundreds of existing examples of define_split in the existing backends, so it should be easy to see how it is used. Ian
