[pypy-commit] pypy default: Save a word on x86-64.

[arigo]

Author: Armin Rigo <arigo at tunes.org>
Branch: 
Changeset: r53786:7b8cadc63e78
Date: 2012-03-16 18:52 +0100
http://bitbucket.org/pypy/pypy/changeset/7b8cadc63e78/

Log:	Save a word on x86-64.

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
@@ -2117,9 +2117,12 @@
         # First, we need to save away the registers listed in
         # 'save_registers' that are not callee-save.  XXX We assume that
         # the XMM registers won't be modified.  We store them in
-        # [ESP+4], [ESP+8], etc., leaving enough room in [ESP] for the
-        # single argument to closestack_addr below.
-        p = WORD
+        # [ESP+4], [ESP+8], etc.; on x86-32 we leave enough room in [ESP]
+        # for the single argument to closestack_addr below.
+        if IS_X86_32:
+            p = WORD
+        elif IS_X86_64:
+            p = 0
         for reg in self._regalloc.rm.save_around_call_regs:
             if reg in save_registers:
                 self.mc.MOV_sr(p, reg.value)
@@ -2174,7 +2177,10 @@
         #
         self._emit_call(-1, imm(self.releasegil_addr), args)
         # Finally, restore the registers saved above.
-        p = WORD
+        if IS_X86_32:
+            p = WORD
+        elif IS_X86_64:
+            p = 0
         for reg in self._regalloc.rm.save_around_call_regs:
             if reg in save_registers:
                 self.mc.MOV_rs(reg.value, p)