On Wed, Apr 19, 2017 at 11:35 PM, Jeffrey Walton <noloa...@gmail.com> wrote: > On Wed, Apr 19, 2017 at 9:57 PM, Jim Wilson <jim.wil...@linaro.org> wrote: >> On Wed, Apr 19, 2017 at 12:38 PM, Jeffrey Walton <noloa...@gmail.com> wrote: > The thing I am not sure about is saving and restoring the cpu. The AS > manual states "Specifying .cpu clears any previously selected > architecture extensions". But arch_extensions does not seem to work, > so I guess its a moot point. Also, the manual only discusses '.set' in > the context of MIPS. The program below does not produce a warning or > error. I am not sure if its doing what's expected.
For a non-mips target, .set is the same as .equ and =, it sets a symbol value to an expression. Your code using .set push and .set pop isn't doing anything useful. I don't see any mechanism in the assembler to save/restore a cpu setting. There is one in gcc, but not until gcc 6. I don't see any easy solution for you at the moment, you need a binutils/gcc upgrade, or you need to put crc code in separate files. Or you could force all files to be compiled with -mcpu=generic, and then you can use .cpu to add/remove crc support as necessary. Jim _______________________________________________ linaro-toolchain mailing list linaro-toolchain@lists.linaro.org https://lists.linaro.org/mailman/listinfo/linaro-toolchain
