On 01/12/2010 07:28 AM, fanqifei wrote: >>> I still not understand when the insn "insv" in target.md can be used >>> in the RTL representation of the code. >> >> I already told you in my previous message. Did you not see it? > > Hi Andrew, I did see it. But that's not exactly what I want. > Is the builtin function the only way to utilize ins instruction? > According to the webpage > http://gcc.gnu.org/ml/gcc-patches/2005-05/msg02430.html, the builtin > functions are introduced for the DSP extension. As INS instruction is > introduced in MIPS32 R2 too(not exactly the same as in DSP extension), > I guess there must be another method to utilize ins instruction of > MIPS32R2 except inline asm or builtin functions. I grepped through the gcc back-end. There is code to use insv and extv in bitfield accesses. I'm not really sure what is going on in your case. I think David Daney is right: make sure that with the latest development version of gcc and the correct options this still happens, and file a bug report. Andrew.
