JezK
Edit File: switch_ppc_aix.h
/* * this is the internal transfer function. * * HISTORY * 07-Mar-11 Floris Bruynooghe <flub@devork.be> * Do not add stsizediff to general purpose * register (GPR) 30 as this is a non-volatile and * unused by the PowerOpen Environment, therefore * this was modifying a user register instead of the * frame pointer (which does not seem to exist). * 07-Sep-05 (py-dev mailing list discussion) * removed 'r31' from the register-saved. !!!! WARNING !!!! * It means that this file can no longer be compiled statically! * It is now only suitable as part of a dynamic library! * 14-Jan-04 Bob Ippolito <bob@redivi.com> * added cr2-cr4 to the registers to be saved. * Open questions: Should we save FP registers? * What about vector registers? * Differences between darwin and unix? * 24-Nov-02 Christian Tismer <tismer@tismer.com> * needed to add another magic constant to insure * that f in slp_eval_frame(PyFrameObject *f) * STACK_REFPLUS will probably be 1 in most cases. * gets included into the saved stack area. * 04-Oct-02 Gustavo Niemeyer <niemeyer@conectiva.com> * Ported from MacOS version. * 17-Sep-02 Christian Tismer <tismer@tismer.com> * after virtualizing stack save/restore, the * stack size shrunk a bit. Needed to introduce * an adjustment STACK_MAGIC per platform. * 15-Sep-02 Gerd Woetzel <gerd.woetzel@GMD.DE> * slightly changed framework for sparc * 29-Jun-02 Christian Tismer <tismer@tismer.com> * Added register 13-29, 31 saves. The same way as * Armin Rigo did for the x86_unix version. * This seems to be now fully functional! * 04-Mar-02 Hye-Shik Chang <perky@fallin.lv> * Ported from i386. */ #define STACK_REFPLUS 1 #ifdef SLP_EVAL #define STACK_MAGIC 3 /* !!!!WARNING!!!! need to add "r31" in the next line if this header file * is meant to be compiled non-dynamically! */ #define REGS_TO_SAVE "r13", "r14", "r15", "r16", "r17", "r18", "r19", "r20", \ "r21", "r22", "r23", "r24", "r25", "r26", "r27", "r28", "r29", \ "cr2", "cr3", "cr4" static int slp_switch(void) { register int err; register int *stackref, stsizediff; __asm__ volatile ("" : : : REGS_TO_SAVE); __asm__ ("mr %0, 1" : "=r" (stackref) : ); { SLP_SAVE_STATE(stackref, stsizediff); __asm__ volatile ( "mr 11, %0\n" "add 1, 1, 11\n" : /* no outputs */ : "r" (stsizediff) : "11" ); SLP_RESTORE_STATE(); } __asm__ volatile ("" : : : REGS_TO_SAVE); __asm__ volatile ("li %0, 0" : "=r" (err)); return err; } #endif /* * further self-processing support */ /* * if you want to add self-inspection tools, place them * here. See the x86_msvc for the necessary defines. * These features are highly experimental und not * essential yet. */