From: Aurelien Jarno <aurelien@aurel32.net>
Date: Sat, 8 Sep 2012 03:45:43 +0000 (+0000)
Subject: tcg/s390: fix ld/st with CONFIG_TCG_PASS_AREG0
X-Git-Tag: Tizen_Studio_1.3_Release_p2.3.1~900^2~59^2~1878
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6845df48cec9cc6833429942b3ceed333a791119;p=sdk%2Femulator%2Fqemu.git

tcg/s390: fix ld/st with CONFIG_TCG_PASS_AREG0

The load/store slow path has been broken in e141ab52d:
- We need to move 4 registers for store functions and 3 registers for
  load functions and not the reverse.
- According to the s390x calling convention the arguments of a function
  should be zero extended. This means that the register shift should be
  done with TCG_TYPE_I64 to ensure the higher word is correctly zero
  extended when needed.

I am aware that CONFIG_TCG_PASS_AREG0 is being removed and thus that
this patch can be improved, but doing so means it can also be applied to
the 1.1 and 1.2 stable branches.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Alexander Graf <agraf@suse.de>
---

diff --git a/tcg/s390/tcg-target.c b/tcg/s390/tcg-target.c
index 04662c15fd..99b53390c5 100644
--- a/tcg/s390/tcg-target.c
+++ b/tcg/s390/tcg-target.c
@@ -1509,11 +1509,13 @@ static void tcg_prepare_qemu_ldst(TCGContext* s, TCGReg data_reg,
         tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_R4, mem_index);
 #ifdef CONFIG_TCG_PASS_AREG0
         /* XXX/FIXME: suboptimal */
-        tcg_out_mov(s, TCG_TYPE_I32, tcg_target_call_iarg_regs[2],
+        tcg_out_mov(s, TCG_TYPE_I64, tcg_target_call_iarg_regs[3],
+                    tcg_target_call_iarg_regs[2]);
+        tcg_out_mov(s, TCG_TYPE_I64, tcg_target_call_iarg_regs[2],
                     tcg_target_call_iarg_regs[1]);
-        tcg_out_mov(s, TCG_TYPE_TL, tcg_target_call_iarg_regs[1],
+        tcg_out_mov(s, TCG_TYPE_I64, tcg_target_call_iarg_regs[1],
                     tcg_target_call_iarg_regs[0]);
-        tcg_out_mov(s, TCG_TYPE_PTR, tcg_target_call_iarg_regs[0],
+        tcg_out_mov(s, TCG_TYPE_I64, tcg_target_call_iarg_regs[0],
                     TCG_AREG0);
 #endif
         tgen_calli(s, (tcg_target_ulong)qemu_st_helpers[s_bits]);
@@ -1521,13 +1523,11 @@ static void tcg_prepare_qemu_ldst(TCGContext* s, TCGReg data_reg,
         tcg_out_movi(s, TCG_TYPE_I32, arg1, mem_index);
 #ifdef CONFIG_TCG_PASS_AREG0
         /* XXX/FIXME: suboptimal */
-        tcg_out_mov(s, TCG_TYPE_I32, tcg_target_call_iarg_regs[3],
-                    tcg_target_call_iarg_regs[2]);
         tcg_out_mov(s, TCG_TYPE_I64, tcg_target_call_iarg_regs[2],
                     tcg_target_call_iarg_regs[1]);
-        tcg_out_mov(s, TCG_TYPE_TL, tcg_target_call_iarg_regs[1],
+        tcg_out_mov(s, TCG_TYPE_I64, tcg_target_call_iarg_regs[1],
                     tcg_target_call_iarg_regs[0]);
-        tcg_out_mov(s, TCG_TYPE_PTR, tcg_target_call_iarg_regs[0],
+        tcg_out_mov(s, TCG_TYPE_I64, tcg_target_call_iarg_regs[0],
                     TCG_AREG0);
 #endif
         tgen_calli(s, (tcg_target_ulong)qemu_ld_helpers[s_bits]);