Author: hager <sven.ha...@uni-duesseldorf.de>
Branch: ppc-jit-backend
Changeset: r47721:72bc90d0a73b
Date: 2011-09-30 18:44 +0200
http://bitbucket.org/pypy/pypy/changeset/72bc90d0a73b/
Log: Adopted gen_descr_encoding from ARM backend and applied fix to a
problem that occured when allocating memory for guard encodings.
diff --git a/pypy/jit/backend/ppc/ppcgen/ppc_assembler.py
b/pypy/jit/backend/ppc/ppcgen/ppc_assembler.py
--- a/pypy/jit/backend/ppc/ppcgen/ppc_assembler.py
+++ b/pypy/jit/backend/ppc/ppcgen/ppc_assembler.py
@@ -282,6 +282,60 @@
looptoken.ppc_code = loop_start + start_pos
self._teardown()
+ # For an explanation of the encoding, see
+ # backend/arm/assembler.py
+ def gen_descr_encoding(self, descr, args, arglocs):
+ minsize = (len(arglocs) - 1) * 6 + 5
+ memsize = self.align(minsize)
+ memaddr = self.datablockwrapper.malloc_aligned(memsize, alignment=1)
+ mem = rffi.cast(rffi.CArrayPtr(lltype.Char), memaddr)
+ i = 0
+ j = 0
+ while i < len(args):
+ if arglocs[i+1]:
+ arg = args[i]
+ loc = arglocs[i+1]
+ if arg.type == INT:
+ mem[j] = self.INT_TYPE
+ j += 1
+ elif arg.type == REF:
+ mem[j] = self.REF_TYPE
+ j += 1
+ elif arg.type == FLOAT:
+ mem[j] = self.FLOAT_TYPE
+ j += 1
+ else:
+ assert 0, 'unknown type'
+
+ if loc.is_reg() or loc.is_vfp_reg():
+ mem[j] = chr(loc.value)
+ j += 1
+ elif loc.is_imm() or loc.is_imm_float():
+ assert (arg.type == INT or arg.type == REF
+ or arg.type == FLOAT)
+ mem[j] = self.IMM_LOC
+ encode32(mem, j+1, loc.getint())
+ j += 5
+ else:
+ mem[j] = self.STACK_LOC
+ encode32(mem, j+1, loc.position)
+ j += 5
+ else:
+ mem[j] = self.EMPTY_LOC
+ j += 1
+ i += 1
+
+ mem[j] = chr(0xFF)
+
+ n = self.cpu.get_fail_descr_number(descr)
+ encode32(mem, j+1, n)
+ return memaddr
+
+ def align(self, size):
+ while size % 8 != 0:
+ size += 1
+ return size
+
def _teardown(self):
self.patch_list = None
self.pending_guards = None
_______________________________________________
pypy-commit mailing list
pypy-commit@python.org
http://mail.python.org/mailman/listinfo/pypy-commit
