"Bhaskar Reddy" <bhaskar@xxxxxxxxxxxxxx> writes: > After building gcc, in build/gcc, we can find insn-codes.h which contains, > enumeration 'insn_code' numbering of define_insn pattern by their name. > > for some patterns, it contains value 'CODE_FOR_nothing' and for some > patterns it assigns an integer value. > > For example: > > #define CODE_FOR_extendhidi2 CODE_FOR_nothing > #define CODE_FOR_extendqidi2 CODE_FOR_nothing > CODE_FOR_extendhisi2 = 81, > CODE_FOR_extendqihi2 = 82, > CODE_FOR_extendqisi2 = 83, > CODE_FOR_truncxfsf2_i387_noop = 96, > CODE_FOR_truncxfdf2_i387_noop = 100, > > i686-linux-gnu is the target machine, for which my compiler was build. > > From the enum like above , How can i figure out which are the instructions > corresponding to 'i386' only.? [ as i386.md file was used for many other > cpu-types also, like pentium, k6 etc., am i getting this confusion! ] >From the list above, you can't. The only way to figure out which processors an insn pattern applies to is to look at the insn predicates. I think it would be simplest to look at the .md file. But, if you want, you can look at the macros in the generated file insn-flags.h. Ian
