[pypy-svn] pypy 32ptr-on-64bit: Implement support for HIDE_INTO_PTR32 and SHOW_FROM_PTR32. Easy.

[arigo]

Author: Armin Rigo <arigo at tunes.org>
Branch: 32ptr-on-64bit
Changeset: r43411:c773659e239c
Date: 2011-04-16 22:50 +0200
http://bitbucket.org/pypy/pypy/changeset/c773659e239c/

Log:	Implement support for HIDE_INTO_PTR32 and SHOW_FROM_PTR32. Easy.

diff --git a/pypy/jit/backend/x86/assembler.py b/pypy/jit/backend/x86/assembler.py
--- a/pypy/jit/backend/x86/assembler.py
+++ b/pypy/jit/backend/x86/assembler.py
@@ -1258,6 +1258,12 @@
         self.mc.SHR_ri(resloc.value, 7)
         self.mc.AND_ri(resloc.value, 1)
 
+    def genop_hide_into_ptr32(self, op, arglocs, resloc):
+        self.mc.SHR(resloc, imm(3))
+
+    def genop_show_from_ptr32(self, op, arglocs, resloc):
+        self.mc.SHL(resloc, imm(3))
+
     def genop_new_with_vtable(self, op, arglocs, result_loc):
         assert result_loc is eax
         loc_vtable = arglocs[-1]

diff --git a/pypy/jit/backend/x86/regalloc.py b/pypy/jit/backend/x86/regalloc.py
--- a/pypy/jit/backend/x86/regalloc.py
+++ b/pypy/jit/backend/x86/regalloc.py
@@ -556,6 +556,8 @@
         self.Perform(op, [res], res)
 
     consider_int_invert = consider_int_neg
+    consider_hide_into_ptr32 = consider_int_neg     # SHR reg, 3
+    consider_show_from_ptr32 = consider_int_neg     # SHL reg, 3
 
     def consider_int_lshift(self, op):
         if isinstance(op.getarg(1), Const):