diff --git a/runtime/interpreter/mterp/x86/bindiv.S b/runtime/interpreter/mterp/x86/bindiv.S
index bb5b319..e87ba45 100644
--- a/runtime/interpreter/mterp/x86/bindiv.S
+++ b/runtime/interpreter/mterp/x86/bindiv.S
@@ -13,10 +13,10 @@
     je      common_errDivideByZero
     movl    %eax, %edx
     orl     %ecx, %edx
-    test    $$0xFFFFFF00, %edx              # If both arguments are less
+    testl   $$0xFFFFFF00, %edx              # If both arguments are less
                                             #   than 8-bit and +ve
     jz      .L${opcode}_8                   # Do 8-bit divide
-    test    $$0xFFFF0000, %edx              # If both arguments are less
+    testl   $$0xFFFF0000, %edx              # If both arguments are less
                                             #   than 16-bit and +ve
     jz      .L${opcode}_16                  # Do 16-bit divide
     cmpl    $$-1, %ecx
diff --git a/runtime/interpreter/mterp/x86/footer.S b/runtime/interpreter/mterp/x86/footer.S
index 385e784..a1532fa 100644
--- a/runtime/interpreter/mterp/x86/footer.S
+++ b/runtime/interpreter/mterp/x86/footer.S
@@ -114,7 +114,7 @@
     lea     OFF_FP_SHADOWFRAME(rFP), %ecx
     movl    %ecx, OUT_ARG1(%esp)
     call    SYMBOL(MterpHandleException)
-    testl   %eax, %eax
+    testb   %al, %al
     jz      MterpExceptionReturn
     REFRESH_IBASE
     movl    OFF_FP_CODE_ITEM(rFP), %eax
diff --git a/runtime/interpreter/mterp/x86/header.S b/runtime/interpreter/mterp/x86/header.S
index 0977b90..3fbbbf9 100644
--- a/runtime/interpreter/mterp/x86/header.S
+++ b/runtime/interpreter/mterp/x86/header.S
@@ -182,11 +182,6 @@
 
 /*
  * Refresh handler table.
- * IBase handles uses the caller save register so we must restore it after each call.
- * Also it is used as a result of some 64-bit operations (like imul) and we should
- * restore it in such cases also.
- *
- * TODO: Consider spilling the IBase instead of restoring it from Thread structure.
  */
 .macro REFRESH_IBASE
     movl    rSELF, rIBASE
@@ -194,9 +189,22 @@
 .endm
 
 /*
+ * Refresh handler table.
+ * IBase handles uses the caller save register so we must restore it after each call.
+ * Also it is used as a result of some 64-bit operations (like imul) and we should
+ * restore it in such cases also.
+ *
+ * TODO: Consider spilling the IBase instead of restoring it from Thread structure.
+ */
+.macro RESTORE_IBASE
+    movl    rSELF, rIBASE
+    movl    THREAD_CURRENT_IBASE_OFFSET(rIBASE), rIBASE
+.endm
+
+/*
  * If rSELF is already loaded then we can use it from known reg.
  */
-.macro REFRESH_IBASE_FROM_SELF _reg
+.macro RESTORE_IBASE_FROM_SELF _reg
     movl    THREAD_CURRENT_IBASE_OFFSET(\_reg), rIBASE
 .endm
 
diff --git a/runtime/interpreter/mterp/x86/invoke.S b/runtime/interpreter/mterp/x86/invoke.S
index 054fbfd..bbd88cf 100644
--- a/runtime/interpreter/mterp/x86/invoke.S
+++ b/runtime/interpreter/mterp/x86/invoke.S
@@ -14,7 +14,7 @@
     REFRESH_INST ${opnum}
     movl    rINST, OUT_ARG3(%esp)
     call    SYMBOL($helper)
-    testl   %eax, %eax
+    testb   %al, %al
     jz      MterpException
-    REFRESH_IBASE
+    RESTORE_IBASE
     ADVANCE_PC_FETCH_AND_GOTO_NEXT 3
diff --git a/runtime/interpreter/mterp/x86/op_aget_object.S b/runtime/interpreter/mterp/x86/op_aget_object.S
index cbfb50c..35ec053 100644
--- a/runtime/interpreter/mterp/x86/op_aget_object.S
+++ b/runtime/interpreter/mterp/x86/op_aget_object.S
@@ -13,7 +13,7 @@
     movl    %ecx, OUT_ARG1(%esp)
     call    SYMBOL(artAGetObjectFromMterp)  # (array, index)
     movl    rSELF, %ecx
-    REFRESH_IBASE_FROM_SELF %ecx
+    RESTORE_IBASE_FROM_SELF %ecx
     cmpl    $$0, THREAD_EXCEPTION_OFFSET(%ecx)
     jnz     MterpException
     SET_VREG_OBJECT %eax, rINST
diff --git a/runtime/interpreter/mterp/x86/op_aput_object.S b/runtime/interpreter/mterp/x86/op_aput_object.S
index 9cfc221..980b26a 100644
--- a/runtime/interpreter/mterp/x86/op_aput_object.S
+++ b/runtime/interpreter/mterp/x86/op_aput_object.S
@@ -9,7 +9,7 @@
     REFRESH_INST ${opnum}
     movl    rINST, OUT_ARG2(%esp)
     call    SYMBOL(MterpAputObject)         # (array, index)
-    REFRESH_IBASE
-    testl   %eax, %eax
+    RESTORE_IBASE
+    testb   %al, %al
     jz      MterpPossibleException
     ADVANCE_PC_FETCH_AND_GOTO_NEXT 2
diff --git a/runtime/interpreter/mterp/x86/op_check_cast.S b/runtime/interpreter/mterp/x86/op_check_cast.S
index ae2ff9e..d090aa3 100644
--- a/runtime/interpreter/mterp/x86/op_check_cast.S
+++ b/runtime/interpreter/mterp/x86/op_check_cast.S
@@ -12,7 +12,7 @@
     movl    rSELF, %ecx
     movl    %ecx, OUT_ARG3(%esp)
     call    SYMBOL(MterpCheckCast)          # (index, &obj, method, self)
-    REFRESH_IBASE
-    testl   %eax, %eax
+    RESTORE_IBASE
+    testb   %al, %al
     jnz     MterpPossibleException
     ADVANCE_PC_FETCH_AND_GOTO_NEXT 2
diff --git a/runtime/interpreter/mterp/x86/op_const_class.S b/runtime/interpreter/mterp/x86/op_const_class.S
index 343e110..60be789 100644
--- a/runtime/interpreter/mterp/x86/op_const_class.S
+++ b/runtime/interpreter/mterp/x86/op_const_class.S
@@ -8,7 +8,7 @@
     movl    rSELF, %eax
     movl    %eax, OUT_ARG3(%esp)
     call    SYMBOL(MterpConstClass)         # (index, tgt_reg, shadow_frame, self)
-    REFRESH_IBASE
-    testl   %eax, %eax
+    RESTORE_IBASE
+    testb   %al, %al
     jnz     MterpPossibleException
     ADVANCE_PC_FETCH_AND_GOTO_NEXT 2
diff --git a/runtime/interpreter/mterp/x86/op_const_string.S b/runtime/interpreter/mterp/x86/op_const_string.S
index bbac69c..ff93b23 100644
--- a/runtime/interpreter/mterp/x86/op_const_string.S
+++ b/runtime/interpreter/mterp/x86/op_const_string.S
@@ -8,7 +8,7 @@
     movl    rSELF, %eax
     movl    %eax, OUT_ARG3(%esp)
     call    SYMBOL(MterpConstString)        # (index, tgt_reg, shadow_frame, self)
-    REFRESH_IBASE
-    testl   %eax, %eax
+    RESTORE_IBASE
+    testb   %al, %al
     jnz     MterpPossibleException
     ADVANCE_PC_FETCH_AND_GOTO_NEXT 2
diff --git a/runtime/interpreter/mterp/x86/op_const_string_jumbo.S b/runtime/interpreter/mterp/x86/op_const_string_jumbo.S
index 4236807..e7f952a 100644
--- a/runtime/interpreter/mterp/x86/op_const_string_jumbo.S
+++ b/runtime/interpreter/mterp/x86/op_const_string_jumbo.S
@@ -8,7 +8,7 @@
     movl    rSELF, %eax
     movl    %eax, OUT_ARG3(%esp)
     call    SYMBOL(MterpConstString)        # (index, tgt_reg, shadow_frame, self)
-    REFRESH_IBASE
-    testl   %eax, %eax
+    RESTORE_IBASE
+    testb   %al, %al
     jnz     MterpPossibleException
     ADVANCE_PC_FETCH_AND_GOTO_NEXT 3
diff --git a/runtime/interpreter/mterp/x86/op_fill_array_data.S b/runtime/interpreter/mterp/x86/op_fill_array_data.S
index 004aed9..5855284 100644
--- a/runtime/interpreter/mterp/x86/op_fill_array_data.S
+++ b/runtime/interpreter/mterp/x86/op_fill_array_data.S
@@ -7,6 +7,6 @@
     movl    %ecx, OUT_ARG1(%esp)
     call    SYMBOL(MterpFillArrayData)      # (obj, payload)
     REFRESH_IBASE
-    testl   %eax, %eax                      # 0 means an exception is thrown
+    testb   %al, %al                        # 0 means an exception is thrown
     jz      MterpPossibleException
     ADVANCE_PC_FETCH_AND_GOTO_NEXT 3
diff --git a/runtime/interpreter/mterp/x86/op_filled_new_array.S b/runtime/interpreter/mterp/x86/op_filled_new_array.S
index a2bac29..35b2fe8 100644
--- a/runtime/interpreter/mterp/x86/op_filled_new_array.S
+++ b/runtime/interpreter/mterp/x86/op_filled_new_array.S
@@ -15,6 +15,6 @@
     movl    %ecx, OUT_ARG2(%esp)
     call    SYMBOL($helper)
     REFRESH_IBASE
-    testl   %eax, %eax                      # 0 means an exception is thrown
+    testb   %al, %al                        # 0 means an exception is thrown
     jz      MterpPossibleException
     ADVANCE_PC_FETCH_AND_GOTO_NEXT 3
diff --git a/runtime/interpreter/mterp/x86/op_iget.S b/runtime/interpreter/mterp/x86/op_iget.S
index 9932610..e3304ba 100644
--- a/runtime/interpreter/mterp/x86/op_iget.S
+++ b/runtime/interpreter/mterp/x86/op_iget.S
@@ -17,7 +17,7 @@
     movl    %ecx, OUT_ARG3(%esp)            # self
     call    SYMBOL($helper)
     movl    rSELF, %ecx
-    REFRESH_IBASE_FROM_SELF %ecx
+    RESTORE_IBASE_FROM_SELF %ecx
     cmpl    $$0, THREAD_EXCEPTION_OFFSET(%ecx)
     jnz     MterpException                  # bail out
     andb    $$0xf, rINSTbl                  # rINST <- A
diff --git a/runtime/interpreter/mterp/x86/op_iget_object_quick.S b/runtime/interpreter/mterp/x86/op_iget_object_quick.S
index fe16694..b1551a0 100644
--- a/runtime/interpreter/mterp/x86/op_iget_object_quick.S
+++ b/runtime/interpreter/mterp/x86/op_iget_object_quick.S
@@ -9,7 +9,7 @@
     EXPORT_PC
     call    SYMBOL(artIGetObjectFromMterp)  # (obj, offset)
     movl    rSELF, %ecx
-    REFRESH_IBASE_FROM_SELF %ecx
+    RESTORE_IBASE_FROM_SELF %ecx
     cmpl    $$0, THREAD_EXCEPTION_OFFSET(%ecx)
     jnz     MterpException                  # bail out
     andb    $$0xf,rINSTbl                   # rINST <- A
diff --git a/runtime/interpreter/mterp/x86/op_iget_wide.S b/runtime/interpreter/mterp/x86/op_iget_wide.S
index 92126b4..a5d7e69 100644
--- a/runtime/interpreter/mterp/x86/op_iget_wide.S
+++ b/runtime/interpreter/mterp/x86/op_iget_wide.S
@@ -21,5 +21,5 @@
     andb    $$0xf, rINSTbl                  # rINST <- A
     SET_VREG %eax, rINST
     SET_VREG_HIGH %edx, rINST
-    REFRESH_IBASE_FROM_SELF %ecx
+    RESTORE_IBASE_FROM_SELF %ecx
     ADVANCE_PC_FETCH_AND_GOTO_NEXT 2
diff --git a/runtime/interpreter/mterp/x86/op_instance_of.S b/runtime/interpreter/mterp/x86/op_instance_of.S
index fd5bf44..e6fe5b2 100644
--- a/runtime/interpreter/mterp/x86/op_instance_of.S
+++ b/runtime/interpreter/mterp/x86/op_instance_of.S
@@ -18,7 +18,7 @@
     movl    %ecx, OUT_ARG3(%esp)
     call    SYMBOL(MterpInstanceOf)         # (index, &obj, method, self)
     movl    rSELF, %ecx
-    REFRESH_IBASE_FROM_SELF %ecx
+    RESTORE_IBASE_FROM_SELF %ecx
     cmpl    $$0, THREAD_EXCEPTION_OFFSET(%ecx)
     jnz     MterpException
     andb    $$0xf, rINSTbl                  # rINSTbl <- A
diff --git a/runtime/interpreter/mterp/x86/op_iput.S b/runtime/interpreter/mterp/x86/op_iput.S
index 13cfe5c..c847e2d 100644
--- a/runtime/interpreter/mterp/x86/op_iput.S
+++ b/runtime/interpreter/mterp/x86/op_iput.S
@@ -19,7 +19,7 @@
     movl    OFF_FP_METHOD(rFP), %eax
     movl    %eax, OUT_ARG3(%esp)            # referrer
     call    SYMBOL($handler)
-    testl   %eax, %eax
+    testb   %al, %al
     jnz     MterpPossibleException
-    REFRESH_IBASE
+    RESTORE_IBASE
     ADVANCE_PC_FETCH_AND_GOTO_NEXT 2
diff --git a/runtime/interpreter/mterp/x86/op_iput_object.S b/runtime/interpreter/mterp/x86/op_iput_object.S
index f63075c..e013697 100644
--- a/runtime/interpreter/mterp/x86/op_iput_object.S
+++ b/runtime/interpreter/mterp/x86/op_iput_object.S
@@ -7,7 +7,7 @@
     movl    rSELF, %eax
     movl    %eax, OUT_ARG3(%esp)
     call    SYMBOL(MterpIputObject)
-    testl   %eax, %eax
+    testb   %al, %al
     jz      MterpException
-    REFRESH_IBASE
+    RESTORE_IBASE
     ADVANCE_PC_FETCH_AND_GOTO_NEXT 2
diff --git a/runtime/interpreter/mterp/x86/op_iput_object_quick.S b/runtime/interpreter/mterp/x86/op_iput_object_quick.S
index d54b1b7..cb77929 100644
--- a/runtime/interpreter/mterp/x86/op_iput_object_quick.S
+++ b/runtime/interpreter/mterp/x86/op_iput_object_quick.S
@@ -5,7 +5,7 @@
     REFRESH_INST ${opnum}
     movl    rINST, OUT_ARG2(%esp)
     call    SYMBOL(MterpIputObjectQuick)
-    testl   %eax, %eax
+    testb   %al, %al
     jz      MterpException
-    REFRESH_IBASE
+    RESTORE_IBASE
     ADVANCE_PC_FETCH_AND_GOTO_NEXT 2
diff --git a/runtime/interpreter/mterp/x86/op_iput_wide.S b/runtime/interpreter/mterp/x86/op_iput_wide.S
index 573e14d..122eecf 100644
--- a/runtime/interpreter/mterp/x86/op_iput_wide.S
+++ b/runtime/interpreter/mterp/x86/op_iput_wide.S
@@ -13,7 +13,7 @@
     movl    OFF_FP_METHOD(rFP), %eax
     movl    %eax, OUT_ARG3(%esp)            # referrer
     call    SYMBOL(artSet64InstanceFromMterp)
-    testl   %eax, %eax
+    testb   %al, %al
     jnz     MterpPossibleException
-    REFRESH_IBASE
+    RESTORE_IBASE
     ADVANCE_PC_FETCH_AND_GOTO_NEXT 2
diff --git a/runtime/interpreter/mterp/x86/op_monitor_enter.S b/runtime/interpreter/mterp/x86/op_monitor_enter.S
index 9e885bd..b35c684 100644
--- a/runtime/interpreter/mterp/x86/op_monitor_enter.S
+++ b/runtime/interpreter/mterp/x86/op_monitor_enter.S
@@ -8,7 +8,7 @@
     movl    rSELF, %eax
     movl    %eax, OUT_ARG1(%esp)
     call    SYMBOL(artLockObjectFromCode)   # (object, self)
-    REFRESH_IBASE
-    testl   %eax, %eax
+    RESTORE_IBASE
+    testb   %al, %al
     jnz     MterpException
     ADVANCE_PC_FETCH_AND_GOTO_NEXT 1
diff --git a/runtime/interpreter/mterp/x86/op_monitor_exit.S b/runtime/interpreter/mterp/x86/op_monitor_exit.S
index 0904800..2d17d5e 100644
--- a/runtime/interpreter/mterp/x86/op_monitor_exit.S
+++ b/runtime/interpreter/mterp/x86/op_monitor_exit.S
@@ -12,7 +12,7 @@
     movl    rSELF, %eax
     movl    %eax, OUT_ARG1(%esp)
     call    SYMBOL(artUnlockObjectFromCode) # (object, self)
-    REFRESH_IBASE
-    testl   %eax, %eax
+    RESTORE_IBASE
+    testb   %al, %al
     jnz     MterpException
     ADVANCE_PC_FETCH_AND_GOTO_NEXT 1
diff --git a/runtime/interpreter/mterp/x86/op_mul_int_2addr.S b/runtime/interpreter/mterp/x86/op_mul_int_2addr.S
index f92a28e..da699ae 100644
--- a/runtime/interpreter/mterp/x86/op_mul_int_2addr.S
+++ b/runtime/interpreter/mterp/x86/op_mul_int_2addr.S
@@ -3,8 +3,8 @@
     sarl    $$4, rINST                      # rINST <- B
     GET_VREG %eax, rINST                    # eax <- vB
     andb    $$0xf, %cl                      # ecx <- A
-    mov     rIBASE, LOCAL0(%esp)
+    movl    rIBASE, rINST
     imull   (rFP,%ecx,4), %eax              # trashes rIBASE/edx
-    mov     LOCAL0(%esp), rIBASE
+    movl    rINST, rIBASE
     SET_VREG %eax, %ecx
     ADVANCE_PC_FETCH_AND_GOTO_NEXT 1
diff --git a/runtime/interpreter/mterp/x86/op_mul_int_lit16.S b/runtime/interpreter/mterp/x86/op_mul_int_lit16.S
index 31ab613..056f491 100644
--- a/runtime/interpreter/mterp/x86/op_mul_int_lit16.S
+++ b/runtime/interpreter/mterp/x86/op_mul_int_lit16.S
@@ -3,10 +3,10 @@
     movzbl  rINSTbl, %eax                   # eax <- 000000BA
     sarl    $$4, %eax                       # eax <- B
     GET_VREG %eax, %eax                     # eax <- vB
-    movswl  2(rPC), %ecx                    # ecx <- ssssCCCC
+    movl    rIBASE, %ecx
+    movswl  2(rPC), rIBASE                  # rIBASE <- ssssCCCC
     andb    $$0xf, rINSTbl                  # rINST <- A
-    mov     rIBASE, LOCAL0(%esp)
-    imull   %ecx, %eax                      # trashes rIBASE/edx
-    mov     LOCAL0(%esp), rIBASE
+    imull   rIBASE, %eax                    # trashes rIBASE/edx
+    movl    %ecx, rIBASE
     SET_VREG %eax, rINST
     ADVANCE_PC_FETCH_AND_GOTO_NEXT 2
diff --git a/runtime/interpreter/mterp/x86/op_mul_int_lit8.S b/runtime/interpreter/mterp/x86/op_mul_int_lit8.S
index 6637aa7..59b3844 100644
--- a/runtime/interpreter/mterp/x86/op_mul_int_lit8.S
+++ b/runtime/interpreter/mterp/x86/op_mul_int_lit8.S
@@ -1,9 +1,9 @@
     /* mul/lit8 vAA, vBB, #+CC */
     movzbl  2(rPC), %eax                    # eax <- BB
-    movsbl  3(rPC), %ecx                    # ecx <- ssssssCC
+    movl    rIBASE, %ecx
     GET_VREG  %eax, %eax                    # eax <- rBB
-    mov     rIBASE, LOCAL0(%esp)
-    imull   %ecx, %eax                      # trashes rIBASE/edx
-    mov     LOCAL0(%esp), rIBASE
+    movsbl  3(rPC), rIBASE                  # rIBASE <- ssssssCC
+    imull   rIBASE, %eax                    # trashes rIBASE/edx
+    movl    %ecx, rIBASE
     SET_VREG %eax, rINST
     ADVANCE_PC_FETCH_AND_GOTO_NEXT 2
diff --git a/runtime/interpreter/mterp/x86/op_new_array.S b/runtime/interpreter/mterp/x86/op_new_array.S
index 2490477..16226e9 100644
--- a/runtime/interpreter/mterp/x86/op_new_array.S
+++ b/runtime/interpreter/mterp/x86/op_new_array.S
@@ -15,7 +15,7 @@
     movl    rSELF, %ecx
     movl    %ecx, OUT_ARG3(%esp)
     call    SYMBOL(MterpNewArray)
-    REFRESH_IBASE
-    testl   %eax, %eax                      # 0 means an exception is thrown
+    RESTORE_IBASE
+    testb   %al, %al                        # 0 means an exception is thrown
     jz      MterpPossibleException
     ADVANCE_PC_FETCH_AND_GOTO_NEXT 2
diff --git a/runtime/interpreter/mterp/x86/op_new_instance.S b/runtime/interpreter/mterp/x86/op_new_instance.S
index 712a5eb..f976acc 100644
--- a/runtime/interpreter/mterp/x86/op_new_instance.S
+++ b/runtime/interpreter/mterp/x86/op_new_instance.S
@@ -10,7 +10,7 @@
     REFRESH_INST ${opnum}
     movl    rINST, OUT_ARG2(%esp)
     call    SYMBOL(MterpNewInstance)
-    REFRESH_IBASE
-    testl   %eax, %eax                 # 0 means an exception is thrown
+    RESTORE_IBASE
+    testb   %al, %al                        # 0 means an exception is thrown
     jz      MterpPossibleException
     ADVANCE_PC_FETCH_AND_GOTO_NEXT 2
diff --git a/runtime/interpreter/mterp/x86/op_sget.S b/runtime/interpreter/mterp/x86/op_sget.S
index ec96458..0e9a3d8 100644
--- a/runtime/interpreter/mterp/x86/op_sget.S
+++ b/runtime/interpreter/mterp/x86/op_sget.S
@@ -15,7 +15,7 @@
     movl    %ecx, OUT_ARG2(%esp)            # self
     call    SYMBOL($helper)
     movl    rSELF, %ecx
-    REFRESH_IBASE_FROM_SELF %ecx
+    RESTORE_IBASE_FROM_SELF %ecx
     cmpl    $$0, THREAD_EXCEPTION_OFFSET(%ecx)
     jnz     MterpException
     .if $is_object
diff --git a/runtime/interpreter/mterp/x86/op_sget_wide.S b/runtime/interpreter/mterp/x86/op_sget_wide.S
index 833f266..2b60303 100644
--- a/runtime/interpreter/mterp/x86/op_sget_wide.S
+++ b/runtime/interpreter/mterp/x86/op_sget_wide.S
@@ -17,5 +17,5 @@
     jnz     MterpException
     SET_VREG %eax, rINST                    # fp[A]<- low part
     SET_VREG_HIGH %edx, rINST               # fp[A+1]<- high part
-    REFRESH_IBASE_FROM_SELF %ecx
+    RESTORE_IBASE_FROM_SELF %ecx
     ADVANCE_PC_FETCH_AND_GOTO_NEXT 2
diff --git a/runtime/interpreter/mterp/x86/op_sput.S b/runtime/interpreter/mterp/x86/op_sput.S
index a199281..0b5de09 100644
--- a/runtime/interpreter/mterp/x86/op_sput.S
+++ b/runtime/interpreter/mterp/x86/op_sput.S
@@ -16,7 +16,7 @@
     movl    rSELF, %ecx
     movl    %ecx, OUT_ARG3(%esp)            # self
     call    SYMBOL($helper)
-    testl   %eax, %eax
+    testb   %al, %al
     jnz     MterpException
-    REFRESH_IBASE
+    RESTORE_IBASE
     ADVANCE_PC_FETCH_AND_GOTO_NEXT 2
diff --git a/runtime/interpreter/mterp/x86/op_sput_object.S b/runtime/interpreter/mterp/x86/op_sput_object.S
index e3e57fc..0db5177 100644
--- a/runtime/interpreter/mterp/x86/op_sput_object.S
+++ b/runtime/interpreter/mterp/x86/op_sput_object.S
@@ -7,7 +7,7 @@
     movl    rSELF, %ecx
     movl    %ecx, OUT_ARG3(%esp)
     call    SYMBOL(MterpSputObject)
-    testl   %eax, %eax
+    testb   %al, %al
     jz      MterpException
-    REFRESH_IBASE
+    RESTORE_IBASE
     ADVANCE_PC_FETCH_AND_GOTO_NEXT 2
diff --git a/runtime/interpreter/mterp/x86/op_sput_wide.S b/runtime/interpreter/mterp/x86/op_sput_wide.S
index 7544838..19cff0d 100644
--- a/runtime/interpreter/mterp/x86/op_sput_wide.S
+++ b/runtime/interpreter/mterp/x86/op_sput_wide.S
@@ -14,7 +14,7 @@
     movl    rSELF, %ecx
     movl    %ecx, OUT_ARG3(%esp)            # self
     call    SYMBOL(artSet64IndirectStaticFromMterp)
-    testl   %eax, %eax
+    testb   %al, %al
     jnz     MterpException
-    REFRESH_IBASE
+    RESTORE_IBASE
     ADVANCE_PC_FETCH_AND_GOTO_NEXT 2