* Get rid of the RCS Header stuff.  They're meaningless in git.
 * Add public domain comment to some of the files if the only comment
   was the RCS header.

to work with ppc.

sse2-packed-2008-11-12).

void keyword to specify empty parameter lists.

array. The new function returns 2 new output values.

code/irrat.lisp:
o Rename the original %ieee754-rem-pi/2 to %%ieee754-rem-pi-2.
o Define the new %ieee754-rem-pi/2 function.  This returns the output
  as two output values instead of an array.
o Use the new function.  We should have wrapped the original with
  without-gcing, but we don't have to anymore.

lisp/ppc-arch.c:
lisp/x86-arch.c:
o Implement the new C interface to __ieee754_rem_pio2

lisp/Config.linux_gencgc:
o Use -ffloat-store when compiling e_rem_pio2.c and k_rem_pio2.c, just
  to be sure.

a no-op on all other architectures.  Remove SAVE_CONTEXT references in
places that are not touched by a SPARC target.

need is in the DAR register.

.indent.pro.

LSB of alloc-tn to denote pseudo-atomic interrupted.  We still need
the flag-gn (hardwired to NL3) as a temporary though because we need
somewhere to store the LSB of alloc-tn so we can trap if it's not
zero.

ppc/macros.lisp:
o New pseudo-atomic macro implementing the change.

lisp/ppc-arch.c:
o Update arch_set_pseudo_atomic_interrupted to set the LSB of
  alloc-tn.
o Catch the TWNEI reg_NL3, 0 instruction that denotes a deferred
  interrupt.

lisp/ppc-assem.S:
o Update assembly to code to set and test pseudo-atomic stuff like the
  pseudo-atomic macro does.

as well.

lisp/breakpoint.c:
o Enable function-end stuff in compute_offset for DARWIN too.
o Lots of printf's so we can see what's happening on ppc since gdb is
  majorly broken there.

lisp/ppc-assem.S:
o Actually implement the function-end breakpoint template.  Basically
  copied the sparc version, with appropriate mods.

lisp/ppc-arch.c:
o Add TWLLEI_R0 macro to create the appropriate trap instructions that
  we need, and use as appropriate.
o arch_install_breakpoint was actually broken and installed a twllgei
  instruction instead of twllei.
o arch_do_displaced_inst was also broken.  It didn't install the
  after-break-point trap after the breakpoint trap.  And it also
  didn't continue running the code and returned instead.  That's
  wrong.
o The trap_AfterBreakpoint case in sigill_handler was inserting the
  wrong instruction back.  (Probably too much copying of the sparc
  port.)

relatively straightforward port of the sparc version of
linkage-tables.  Some refinements are probably still needed, as well
as some testing.

Use boot-2005-02-ppc-linkage.lisp to bootstrap this change from the
2005-02 snapshot.

* code/ppc-vm.lisp
  o Add appropriate FOREIGN-SYMBOL-ADDRESS-AUX and FIND-FOREIGN-SYMBOL
    functions for linkage-table.

* compiler/generic/new-genesis.lisp
  o Basically do the same as the sparc port for linkage-tables.
  o need to extern-alien-name on the cold linkages since they C names
    depend on the backend conventions.

* compiler/ppc/alloc.lisp
  o Load "undefined_tramp" appropriately for linkage-tables.

* compiler/ppc/c-call.lisp
  o Define new vops (FOREIGN-SYMBOL-CODE-ADDRESS,
    FOREIGN-SYMBOL-DATA-ADDRESS) for linkage-tables so we can access
    correctly.

* compiler/ppc/cell.lisp
  o Load "closure_tramp" appropriately for linkage-tables
  o Load "undefined_tramp" appropriately for linkage-tables

* compiler/ppc/parms.lisp
  o Put the foreign linkage space start at the end of the static space
    to make it easier to bootstrap.  (We need already mapped memory.)
    We can move this later.
  o Correct TARGET-FOREIGN-LINKAGE-ENTRY-SIZE.
  o Add new static-symbol *linkage-table-data*
  o While were at it, add SPARE-9 and SPARE-0 static symbols so we
    have 10 spares.

* lisp/Config.ppc_darwin
  o Add -DLINKAGE_TABLE to CFLAGS/ASFLAGS if we have linkage-table
    support.

* lisp/Darwin-os.c
  o Add os_dlsym to support linkage-tables.  (This nees a little
    refactoring because we just copied the #defines for dlopen modes.)

* lisp/os-common.c
  o The checking of the linkage tables that is done for sparc almost
    works for ppc, but not quite.  Implement one for ppc.

* lisp/ppc-arch.c
  o Add PPC version of arch_make_jump_entry, arch_make_linkage_entry,
    arch_linkage_entry.

* lisp/ppc-assem.S
  o Add lazy_resolve_linkage to support linkage-tables.  This needs
    some more work.
  o Add undefined_foreign_symbol_trap.  This probably needs work, and
    definitely needs testing.

* lisp/ppc-validate.h
  o Define the start of the linkage space and size.

versions of all the required things, this commit separates the
interrupt handler proper (now interrupt_handle_now_handler) from the
actual work-horse (interrupt_handle_now), which is now only ever called
from the two interrupt handlers, interrupt_handle_now_handler and
maybe_now_maybe_later.  This follows similar changes in SBCL, and is in
fact needed in order to properly use sigreturn in signal handlers, as
required to work around a problem with the G5.