"Rohit Arul Raj" <[EMAIL PROTECTED]> writes: > I am trying to combine the compare and branch instruction. But my > instructions are not getting generated as my operands are not matched > properly. > > Previously for individual compare instructions, i had > operand 0 - Register operand > operand 1 - Non memory operand. > > For branch instruction, > operator 0 - compare operator > operand 1 - label. > > So when i combined compare and branch, i just superimposed both > statements with same conditions with > operand 0 - Register operand > operand 1 - Non memory operand > operator 2 - comparison operator > operand 3 - label. > > 1. Is it the right way to match operands and operators while combining > instruction? > 2. How to check where my instruction matching goes wrong?
When writing an MD file you have to think about what you generate (insns/expanders with standard names) and what you recognize (insns). You have to always generate something which you can recognize. Anyhow, the easier way to generate a combined compare and branch instruction is to use an insn or expander with the cbranchMM4 standard name. See the documentation. Ian
