Author: edelsohn
Branch: ppc-jit-backend
Changeset: r52331:a8c0140a9443
Date: 2012-02-09 15:33 -0500
http://bitbucket.org/pypy/pypy/changeset/a8c0140a9443/
Log: Add redirect call assembler.
diff --git a/pypy/jit/backend/ppc/opassembler.py
b/pypy/jit/backend/ppc/opassembler.py
--- a/pypy/jit/backend/ppc/opassembler.py
+++ b/pypy/jit/backend/ppc/opassembler.py
@@ -1078,6 +1078,21 @@
self._emit_guard(guard_op, regalloc._prepare_guard(guard_op), c.LT)
+ # ../x86/assembler.py:668
+ def redirect_call_assembler(self, oldlooptoken, newlooptoken):
+ # some minimal sanity checking
+ old_nbargs = oldlooptoken.compiled_loop_token._debug_nbargs
+ new_nbargs = newlooptoken.compiled_loop_token._debug_nbargs
+ assert old_nbargs == new_nbargs
+ # we overwrite the instructions at the old _ppc_func_addr
+ # to start with a JMP to the new _ppc_func_addr.
+ # Ideally we should rather patch all existing CALLs, but well.
+ oldadr = oldlooptoken._ppc_func_addr
+ target = newlooptoken._ppc_func_addr
+ mc = PPCBuilder()
+ mc.b_abs(target)
+ mc.copy_to_raw_memory(oldadr)
+
def emit_guard_call_may_force(self, op, guard_op, arglocs, regalloc):
ENCODING_AREA = len(r.MANAGED_REGS) * WORD
self.mc.alloc_scratch_reg()
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