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- /*
- * 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.
- */
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