JavaScriptCore-7600.1.4.15.12.tar.gz

[apple/javascriptcore.git] / jit / JITArithmetic32_64.cpp

diff --git a/jit/JITArithmetic32_64.cpp b/jit/JITArithmetic32_64.cpp
index c1caf61f543682fba95f66a347fa24fe6053397a..30b42d196786fa020e7e574245a16734839ed511 100644 (file)
--- a/jit/JITArithmetic32_64.cpp
+++ b/jit/JITArithmetic32_64.cpp
@@ -31,27 +31,22 @@
 
 #include "CodeBlock.h"
 #include "JITInlines.h"
 
 #include "CodeBlock.h"
 #include "JITInlines.h"

-#include "JITStubCall.h"

 #include "JITStubs.h"
 #include "JSArray.h"
 #include "JSFunction.h"
 #include "Interpreter.h"
 #include "JITStubs.h"
 #include "JSArray.h"
 #include "JSFunction.h"
 #include "Interpreter.h"

-#include "Operations.h"
+#include "JSCInlines.h"

 #include "ResultType.h"
 #include "SamplingTool.h"
 #include "ResultType.h"
 #include "SamplingTool.h"

+#include "SlowPathCall.h"

 
 

-#ifndef NDEBUG
-#include <stdio.h>
-#endif
-
-using namespace std;

 
 namespace JSC {
 
 void JIT::emit_op_negate(Instruction* currentInstruction)
 {
 
 namespace JSC {
 
 void JIT::emit_op_negate(Instruction* currentInstruction)
 {

-    unsigned dst = currentInstruction[1].u.operand;
-    unsigned src = currentInstruction[2].u.operand;
+    int dst = currentInstruction[1].u.operand;
+    int src = currentInstruction[2].u.operand;

 
     emitLoad(src, regT1, regT0);
 
 
     emitLoad(src, regT1, regT0);
 


@@ -75,17 +70,14 @@ void JIT::emit_op_negate(Instruction* currentInstruction)
 
 void JIT::emitSlow_op_negate(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
 
 void JIT::emitSlow_op_negate(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {

-    unsigned dst = currentInstruction[1].u.operand;
-

     linkSlowCase(iter); // 0x7fffffff check
     linkSlowCase(iter); // double check
 
     linkSlowCase(iter); // 0x7fffffff check
     linkSlowCase(iter); // double check
 

-    JITStubCall stubCall(this, cti_op_negate);
-    stubCall.addArgument(regT1, regT0);
-    stubCall.call(dst);
+    JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_negate);
+    slowPathCall.call();

 }
 
 }
 

-void JIT::emit_compareAndJump(OpcodeID opcode, unsigned op1, unsigned op2, unsigned target, RelationalCondition condition)
+void JIT::emit_compareAndJump(OpcodeID opcode, int op1, int op2, unsigned target, RelationalCondition condition)

 {
     JumpList notInt32Op1;
     JumpList notInt32Op2;
 {
     JumpList notInt32Op1;
     JumpList notInt32Op2;


@@ -136,7 +128,7 @@ void JIT::emit_compareAndJump(OpcodeID opcode, unsigned op1, unsigned op2, unsig
     end.link(this);
 }
 
     end.link(this);
 }
 

-void JIT::emit_compareAndJumpSlow(unsigned op1, unsigned op2, unsigned target, DoubleCondition, int (JIT_STUB *stub)(STUB_ARGS_DECLARATION), bool invert, Vector<SlowCaseEntry>::iterator& iter)
+void JIT::emit_compareAndJumpSlow(int op1, int op2, unsigned target, DoubleCondition, size_t (JIT_OPERATION *operation)(ExecState*, EncodedJSValue, EncodedJSValue), bool invert, Vector<SlowCaseEntry>::iterator& iter)

 {
     if (isOperandConstantImmediateChar(op1) || isOperandConstantImmediateChar(op2)) {
         linkSlowCase(iter);
 {
     if (isOperandConstantImmediateChar(op1) || isOperandConstantImmediateChar(op2)) {
         linkSlowCase(iter);


@@ -157,26 +149,25 @@ void JIT::emit_compareAndJumpSlow(unsigned op1, unsigned op2, unsigned target, D
                 linkSlowCase(iter); // double check
         }
     }
                 linkSlowCase(iter); // double check
         }
     }

-    JITStubCall stubCall(this, stub);
-    stubCall.addArgument(op1);
-    stubCall.addArgument(op2);
-    stubCall.call();
-    emitJumpSlowToHot(branchTest32(invert ? Zero : NonZero, regT0), target);
+    emitLoad(op1, regT1, regT0);
+    emitLoad(op2, regT3, regT2);
+    callOperation(operation, regT1, regT0, regT3, regT2);
+    emitJumpSlowToHot(branchTest32(invert ? Zero : NonZero, returnValueGPR), target);

 }
 
 // LeftShift (<<)
 
 void JIT::emit_op_lshift(Instruction* currentInstruction)
 {
 }
 
 // LeftShift (<<)
 
 void JIT::emit_op_lshift(Instruction* currentInstruction)
 {

-    unsigned dst = currentInstruction[1].u.operand;
-    unsigned op1 = currentInstruction[2].u.operand;
-    unsigned op2 = currentInstruction[3].u.operand;
+    int dst = currentInstruction[1].u.operand;
+    int op1 = currentInstruction[2].u.operand;
+    int op2 = currentInstruction[3].u.operand;

 
     if (isOperandConstantImmediateInt(op2)) {
         emitLoad(op1, regT1, regT0);
         addSlowCase(branch32(NotEqual, regT1, TrustedImm32(JSValue::Int32Tag)));
         lshift32(Imm32(getConstantOperand(op2).asInt32()), regT0);
 
     if (isOperandConstantImmediateInt(op2)) {
         emitLoad(op1, regT1, regT0);
         addSlowCase(branch32(NotEqual, regT1, TrustedImm32(JSValue::Int32Tag)));
         lshift32(Imm32(getConstantOperand(op2).asInt32()), regT0);

-        emitStoreAndMapInt32(dst, regT1, regT0, dst == op1, OPCODE_LENGTH(op_lshift));
+        emitStoreInt32(dst, regT0, dst == op1);

         return;
     }
 
         return;
     }
 


@@ -185,32 +176,29 @@ void JIT::emit_op_lshift(Instruction* currentInstruction)
         addSlowCase(branch32(NotEqual, regT1, TrustedImm32(JSValue::Int32Tag)));
     addSlowCase(branch32(NotEqual, regT3, TrustedImm32(JSValue::Int32Tag)));
     lshift32(regT2, regT0);
         addSlowCase(branch32(NotEqual, regT1, TrustedImm32(JSValue::Int32Tag)));
     addSlowCase(branch32(NotEqual, regT3, TrustedImm32(JSValue::Int32Tag)));
     lshift32(regT2, regT0);

-    emitStoreAndMapInt32(dst, regT1, regT0, dst == op1 || dst == op2, OPCODE_LENGTH(op_lshift));
+    emitStoreInt32(dst, regT0, dst == op1 || dst == op2);

 }
 
 void JIT::emitSlow_op_lshift(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
 }
 
 void JIT::emitSlow_op_lshift(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {

-    unsigned dst = currentInstruction[1].u.operand;
-    unsigned op1 = currentInstruction[2].u.operand;
-    unsigned op2 = currentInstruction[3].u.operand;
+    int op1 = currentInstruction[2].u.operand;
+    int op2 = currentInstruction[3].u.operand;

 
     if (!isOperandConstantImmediateInt(op1) && !isOperandConstantImmediateInt(op2))
         linkSlowCase(iter); // int32 check
     linkSlowCase(iter); // int32 check
 
 
     if (!isOperandConstantImmediateInt(op1) && !isOperandConstantImmediateInt(op2))
         linkSlowCase(iter); // int32 check
     linkSlowCase(iter); // int32 check
 

-    JITStubCall stubCall(this, cti_op_lshift);
-    stubCall.addArgument(op1);
-    stubCall.addArgument(op2);
-    stubCall.call(dst);
+    JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_lshift);
+    slowPathCall.call();

 }
 
 // RightShift (>>) and UnsignedRightShift (>>>) helper
 
 void JIT::emitRightShift(Instruction* currentInstruction, bool isUnsigned)
 {
 }
 
 // RightShift (>>) and UnsignedRightShift (>>>) helper
 
 void JIT::emitRightShift(Instruction* currentInstruction, bool isUnsigned)
 {

-    unsigned dst = currentInstruction[1].u.operand;
-    unsigned op1 = currentInstruction[2].u.operand;
-    unsigned op2 = currentInstruction[3].u.operand;
+    int dst = currentInstruction[1].u.operand;
+    int op1 = currentInstruction[2].u.operand;
+    int op2 = currentInstruction[3].u.operand;

 
     // Slow case of rshift makes assumptions about what registers hold the
     // shift arguments, so any changes must be updated there as well.
 
     // Slow case of rshift makes assumptions about what registers hold the
     // shift arguments, so any changes must be updated there as well.


@@ -223,28 +211,26 @@ void JIT::emitRightShift(Instruction* currentInstruction, bool isUnsigned)
                 urshift32(Imm32(shift), regT0);
             else
                 rshift32(Imm32(shift), regT0);
                 urshift32(Imm32(shift), regT0);
             else
                 rshift32(Imm32(shift), regT0);

-        } else if (isUnsigned) // signed right shift by zero is simply toInt conversion
-            addSlowCase(branch32(LessThan, regT0, TrustedImm32(0)));
-        emitStoreAndMapInt32(dst, regT1, regT0, dst == op1, OPCODE_LENGTH(op_rshift));
+        }
+        emitStoreInt32(dst, regT0, dst == op1);

     } else {
         emitLoad2(op1, regT1, regT0, op2, regT3, regT2);
         if (!isOperandConstantImmediateInt(op1))
             addSlowCase(branch32(NotEqual, regT1, TrustedImm32(JSValue::Int32Tag)));
         addSlowCase(branch32(NotEqual, regT3, TrustedImm32(JSValue::Int32Tag)));
     } else {
         emitLoad2(op1, regT1, regT0, op2, regT3, regT2);
         if (!isOperandConstantImmediateInt(op1))
             addSlowCase(branch32(NotEqual, regT1, TrustedImm32(JSValue::Int32Tag)));
         addSlowCase(branch32(NotEqual, regT3, TrustedImm32(JSValue::Int32Tag)));

-        if (isUnsigned) {
+        if (isUnsigned)

             urshift32(regT2, regT0);
             urshift32(regT2, regT0);

-            addSlowCase(branch32(LessThan, regT0, TrustedImm32(0)));
-        } else
+        else

             rshift32(regT2, regT0);
             rshift32(regT2, regT0);

-        emitStoreAndMapInt32(dst, regT1, regT0, dst == op1, OPCODE_LENGTH(op_rshift));
+        emitStoreInt32(dst, regT0, dst == op1);

     }
 }
 
 void JIT::emitRightShiftSlowCase(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter, bool isUnsigned)
 {
     }
 }
 
 void JIT::emitRightShiftSlowCase(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter, bool isUnsigned)
 {

-    unsigned dst = currentInstruction[1].u.operand;
-    unsigned op1 = currentInstruction[2].u.operand;
-    unsigned op2 = currentInstruction[3].u.operand;
+    int dst = currentInstruction[1].u.operand;
+    int op1 = currentInstruction[2].u.operand;
+    int op2 = currentInstruction[3].u.operand;

     if (isOperandConstantImmediateInt(op2)) {
         int shift = getConstantOperand(op2).asInt32() & 0x1f;
         // op1 = regT1:regT0
     if (isOperandConstantImmediateInt(op2)) {
         int shift = getConstantOperand(op2).asInt32() & 0x1f;
         // op1 = regT1:regT0


@@ -259,15 +245,12 @@ void JIT::emitRightShiftSlowCase(Instruction* currentInstruction, Vector<SlowCas
                     urshift32(Imm32(shift), regT0);
                 else
                     rshift32(Imm32(shift), regT0);
                     urshift32(Imm32(shift), regT0);
                 else
                     rshift32(Imm32(shift), regT0);

-            } else if (isUnsigned) // signed right shift by zero is simply toInt conversion
-                failures.append(branch32(LessThan, regT0, TrustedImm32(0)));
+            }

             move(TrustedImm32(JSValue::Int32Tag), regT1);
             emitStoreInt32(dst, regT0, false);
             emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_rshift));
             failures.link(this);
         }
             move(TrustedImm32(JSValue::Int32Tag), regT1);
             emitStoreInt32(dst, regT0, false);
             emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_rshift));
             failures.link(this);
         }

-        if (isUnsigned && !shift)
-            linkSlowCase(iter); // failed to box in hot path

     } else {
         // op1 = regT1:regT0
         // op2 = regT3:regT2
     } else {
         // op1 = regT1:regT0
         // op2 = regT3:regT2


@@ -279,10 +262,9 @@ void JIT::emitRightShiftSlowCase(Instruction* currentInstruction, Vector<SlowCas
                 emitLoadDouble(op1, fpRegT0);
                 failures.append(branch32(NotEqual, regT3, TrustedImm32(JSValue::Int32Tag))); // op2 is not an int
                 failures.append(branchTruncateDoubleToInt32(fpRegT0, regT0));
                 emitLoadDouble(op1, fpRegT0);
                 failures.append(branch32(NotEqual, regT3, TrustedImm32(JSValue::Int32Tag))); // op2 is not an int
                 failures.append(branchTruncateDoubleToInt32(fpRegT0, regT0));

-                if (isUnsigned) {
+                if (isUnsigned)

                     urshift32(regT2, regT0);
                     urshift32(regT2, regT0);

-                    failures.append(branch32(LessThan, regT0, TrustedImm32(0)));
-                } else
+                else

                     rshift32(regT2, regT0);
                 move(TrustedImm32(JSValue::Int32Tag), regT1);
                 emitStoreInt32(dst, regT0, false);
                     rshift32(regT2, regT0);
                 move(TrustedImm32(JSValue::Int32Tag), regT1);
                 emitStoreInt32(dst, regT0, false);


@@ -292,14 +274,10 @@ void JIT::emitRightShiftSlowCase(Instruction* currentInstruction, Vector<SlowCas
         }
 
         linkSlowCase(iter); // int32 check - op2 is not an int
         }
 
         linkSlowCase(iter); // int32 check - op2 is not an int

-        if (isUnsigned)
-            linkSlowCase(iter); // Can't represent unsigned result as an immediate

     }
 
     }
 

-    JITStubCall stubCall(this, isUnsigned ? cti_op_urshift : cti_op_rshift);
-    stubCall.addArgument(op1);
-    stubCall.addArgument(op2);
-    stubCall.call(dst);
+    JITSlowPathCall slowPathCall(this, currentInstruction, isUnsigned ? slow_path_urshift : slow_path_rshift);
+    slowPathCall.call();

 }
 
 // RightShift (>>)
 }
 
 // RightShift (>>)


@@ -326,21 +304,42 @@ void JIT::emitSlow_op_urshift(Instruction* currentInstruction, Vector<SlowCaseEn
     emitRightShiftSlowCase(currentInstruction, iter, true);
 }
 
     emitRightShiftSlowCase(currentInstruction, iter, true);
 }
 

+void JIT::emit_op_unsigned(Instruction* currentInstruction)
+{
+    int result = currentInstruction[1].u.operand;
+    int op1 = currentInstruction[2].u.operand;
+    
+    emitLoad(op1, regT1, regT0);
+    
+    addSlowCase(branch32(NotEqual, regT1, TrustedImm32(JSValue::Int32Tag)));
+    addSlowCase(branch32(LessThan, regT0, TrustedImm32(0)));
+    emitStoreInt32(result, regT0, result == op1);
+}
+
+void JIT::emitSlow_op_unsigned(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
+{
+    linkSlowCase(iter);
+    linkSlowCase(iter);
+    
+    JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_unsigned);
+    slowPathCall.call();
+}
+

 // BitAnd (&)
 
 void JIT::emit_op_bitand(Instruction* currentInstruction)
 {
 // BitAnd (&)
 
 void JIT::emit_op_bitand(Instruction* currentInstruction)
 {

-    unsigned dst = currentInstruction[1].u.operand;
-    unsigned op1 = currentInstruction[2].u.operand;
-    unsigned op2 = currentInstruction[3].u.operand;
+    int dst = currentInstruction[1].u.operand;
+    int op1 = currentInstruction[2].u.operand;
+    int op2 = currentInstruction[3].u.operand;

 
 

-    unsigned op;
+    int op;

     int32_t constant;
     if (getOperandConstantImmediateInt(op1, op2, op, constant)) {
         emitLoad(op, regT1, regT0);
         addSlowCase(branch32(NotEqual, regT1, TrustedImm32(JSValue::Int32Tag)));
         and32(Imm32(constant), regT0);
     int32_t constant;
     if (getOperandConstantImmediateInt(op1, op2, op, constant)) {
         emitLoad(op, regT1, regT0);
         addSlowCase(branch32(NotEqual, regT1, TrustedImm32(JSValue::Int32Tag)));
         and32(Imm32(constant), regT0);

-        emitStoreAndMapInt32(dst, regT1, regT0, dst == op, OPCODE_LENGTH(op_bitand));
+        emitStoreInt32(dst, regT0, dst == op);

         return;
     }
 
         return;
     }
 


@@ -348,40 +347,37 @@ void JIT::emit_op_bitand(Instruction* currentInstruction)
     addSlowCase(branch32(NotEqual, regT1, TrustedImm32(JSValue::Int32Tag)));
     addSlowCase(branch32(NotEqual, regT3, TrustedImm32(JSValue::Int32Tag)));
     and32(regT2, regT0);
     addSlowCase(branch32(NotEqual, regT1, TrustedImm32(JSValue::Int32Tag)));
     addSlowCase(branch32(NotEqual, regT3, TrustedImm32(JSValue::Int32Tag)));
     and32(regT2, regT0);

-    emitStoreAndMapInt32(dst, regT1, regT0, (op1 == dst || op2 == dst), OPCODE_LENGTH(op_bitand));
+    emitStoreInt32(dst, regT0, op1 == dst || op2 == dst);

 }
 
 void JIT::emitSlow_op_bitand(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
 }
 
 void JIT::emitSlow_op_bitand(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {

-    unsigned dst = currentInstruction[1].u.operand;
-    unsigned op1 = currentInstruction[2].u.operand;
-    unsigned op2 = currentInstruction[3].u.operand;
+    int op1 = currentInstruction[2].u.operand;
+    int op2 = currentInstruction[3].u.operand;

 
     if (!isOperandConstantImmediateInt(op1) && !isOperandConstantImmediateInt(op2))
         linkSlowCase(iter); // int32 check
     linkSlowCase(iter); // int32 check
 
 
     if (!isOperandConstantImmediateInt(op1) && !isOperandConstantImmediateInt(op2))
         linkSlowCase(iter); // int32 check
     linkSlowCase(iter); // int32 check
 

-    JITStubCall stubCall(this, cti_op_bitand);
-    stubCall.addArgument(op1);
-    stubCall.addArgument(op2);
-    stubCall.call(dst);
+    JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_bitand);
+    slowPathCall.call();

 }
 
 // BitOr (|)
 
 void JIT::emit_op_bitor(Instruction* currentInstruction)
 {
 }
 
 // BitOr (|)
 
 void JIT::emit_op_bitor(Instruction* currentInstruction)
 {

-    unsigned dst = currentInstruction[1].u.operand;
-    unsigned op1 = currentInstruction[2].u.operand;
-    unsigned op2 = currentInstruction[3].u.operand;
+    int dst = currentInstruction[1].u.operand;
+    int op1 = currentInstruction[2].u.operand;
+    int op2 = currentInstruction[3].u.operand;

 
 

-    unsigned op;
+    int op;

     int32_t constant;
     if (getOperandConstantImmediateInt(op1, op2, op, constant)) {
         emitLoad(op, regT1, regT0);
         addSlowCase(branch32(NotEqual, regT1, TrustedImm32(JSValue::Int32Tag)));
         or32(Imm32(constant), regT0);
     int32_t constant;
     if (getOperandConstantImmediateInt(op1, op2, op, constant)) {
         emitLoad(op, regT1, regT0);
         addSlowCase(branch32(NotEqual, regT1, TrustedImm32(JSValue::Int32Tag)));
         or32(Imm32(constant), regT0);

-        emitStoreAndMapInt32(dst, regT1, regT0, op == dst, OPCODE_LENGTH(op_bitor));
+        emitStoreInt32(dst, regT0, op == dst);

         return;
     }
 
         return;
     }
 


@@ -389,40 +385,37 @@ void JIT::emit_op_bitor(Instruction* currentInstruction)
     addSlowCase(branch32(NotEqual, regT1, TrustedImm32(JSValue::Int32Tag)));
     addSlowCase(branch32(NotEqual, regT3, TrustedImm32(JSValue::Int32Tag)));
     or32(regT2, regT0);
     addSlowCase(branch32(NotEqual, regT1, TrustedImm32(JSValue::Int32Tag)));
     addSlowCase(branch32(NotEqual, regT3, TrustedImm32(JSValue::Int32Tag)));
     or32(regT2, regT0);

-    emitStoreAndMapInt32(dst, regT1, regT0, (op1 == dst || op2 == dst), OPCODE_LENGTH(op_bitor));
+    emitStoreInt32(dst, regT0, op1 == dst || op2 == dst);

 }
 
 void JIT::emitSlow_op_bitor(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
 }
 
 void JIT::emitSlow_op_bitor(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {

-    unsigned dst = currentInstruction[1].u.operand;
-    unsigned op1 = currentInstruction[2].u.operand;
-    unsigned op2 = currentInstruction[3].u.operand;
+    int op1 = currentInstruction[2].u.operand;
+    int op2 = currentInstruction[3].u.operand;

 
     if (!isOperandConstantImmediateInt(op1) && !isOperandConstantImmediateInt(op2))
         linkSlowCase(iter); // int32 check
     linkSlowCase(iter); // int32 check
 
 
     if (!isOperandConstantImmediateInt(op1) && !isOperandConstantImmediateInt(op2))
         linkSlowCase(iter); // int32 check
     linkSlowCase(iter); // int32 check
 

-    JITStubCall stubCall(this, cti_op_bitor);
-    stubCall.addArgument(op1);
-    stubCall.addArgument(op2);
-    stubCall.call(dst);
+    JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_bitor);
+    slowPathCall.call();

 }
 
 // BitXor (^)
 
 void JIT::emit_op_bitxor(Instruction* currentInstruction)
 {
 }
 
 // BitXor (^)
 
 void JIT::emit_op_bitxor(Instruction* currentInstruction)
 {

-    unsigned dst = currentInstruction[1].u.operand;
-    unsigned op1 = currentInstruction[2].u.operand;
-    unsigned op2 = currentInstruction[3].u.operand;
+    int dst = currentInstruction[1].u.operand;
+    int op1 = currentInstruction[2].u.operand;
+    int op2 = currentInstruction[3].u.operand;

 
 

-    unsigned op;
+    int op;

     int32_t constant;
     if (getOperandConstantImmediateInt(op1, op2, op, constant)) {
         emitLoad(op, regT1, regT0);
         addSlowCase(branch32(NotEqual, regT1, TrustedImm32(JSValue::Int32Tag)));
         xor32(Imm32(constant), regT0);
     int32_t constant;
     if (getOperandConstantImmediateInt(op1, op2, op, constant)) {
         emitLoad(op, regT1, regT0);
         addSlowCase(branch32(NotEqual, regT1, TrustedImm32(JSValue::Int32Tag)));
         xor32(Imm32(constant), regT0);

-        emitStoreAndMapInt32(dst, regT1, regT0, op == dst, OPCODE_LENGTH(op_bitxor));
+        emitStoreInt32(dst, regT0, op == dst);

         return;
     }
 
         return;
     }
 


@@ -430,93 +423,82 @@ void JIT::emit_op_bitxor(Instruction* currentInstruction)
     addSlowCase(branch32(NotEqual, regT1, TrustedImm32(JSValue::Int32Tag)));
     addSlowCase(branch32(NotEqual, regT3, TrustedImm32(JSValue::Int32Tag)));
     xor32(regT2, regT0);
     addSlowCase(branch32(NotEqual, regT1, TrustedImm32(JSValue::Int32Tag)));
     addSlowCase(branch32(NotEqual, regT3, TrustedImm32(JSValue::Int32Tag)));
     xor32(regT2, regT0);

-    emitStoreAndMapInt32(dst, regT1, regT0, (op1 == dst || op2 == dst), OPCODE_LENGTH(op_bitxor));
+    emitStoreInt32(dst, regT0, op1 == dst || op2 == dst);

 }
 
 void JIT::emitSlow_op_bitxor(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
 }
 
 void JIT::emitSlow_op_bitxor(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {

-    unsigned dst = currentInstruction[1].u.operand;
-    unsigned op1 = currentInstruction[2].u.operand;
-    unsigned op2 = currentInstruction[3].u.operand;
+    int op1 = currentInstruction[2].u.operand;
+    int op2 = currentInstruction[3].u.operand;

 
     if (!isOperandConstantImmediateInt(op1) && !isOperandConstantImmediateInt(op2))
         linkSlowCase(iter); // int32 check
     linkSlowCase(iter); // int32 check
 
 
     if (!isOperandConstantImmediateInt(op1) && !isOperandConstantImmediateInt(op2))
         linkSlowCase(iter); // int32 check
     linkSlowCase(iter); // int32 check
 

-    JITStubCall stubCall(this, cti_op_bitxor);
-    stubCall.addArgument(op1);
-    stubCall.addArgument(op2);
-    stubCall.call(dst);
+    JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_bitxor);
+    slowPathCall.call();

 }
 
 void JIT::emit_op_inc(Instruction* currentInstruction)
 {
 }
 
 void JIT::emit_op_inc(Instruction* currentInstruction)
 {

-    unsigned srcDst = currentInstruction[1].u.operand;
+    int srcDst = currentInstruction[1].u.operand;

 
     emitLoad(srcDst, regT1, regT0);
 
     addSlowCase(branch32(NotEqual, regT1, TrustedImm32(JSValue::Int32Tag)));
     addSlowCase(branchAdd32(Overflow, TrustedImm32(1), regT0));
 
     emitLoad(srcDst, regT1, regT0);
 
     addSlowCase(branch32(NotEqual, regT1, TrustedImm32(JSValue::Int32Tag)));
     addSlowCase(branchAdd32(Overflow, TrustedImm32(1), regT0));

-    emitStoreAndMapInt32(srcDst, regT1, regT0, true, OPCODE_LENGTH(op_inc));
+    emitStoreInt32(srcDst, regT0, true);

 }
 
 void JIT::emitSlow_op_inc(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
 }
 
 void JIT::emitSlow_op_inc(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {

-    unsigned srcDst = currentInstruction[1].u.operand;
-

     linkSlowCase(iter); // int32 check
     linkSlowCase(iter); // overflow check
 
     linkSlowCase(iter); // int32 check
     linkSlowCase(iter); // overflow check
 

-    JITStubCall stubCall(this, cti_op_inc);
-    stubCall.addArgument(srcDst);
-    stubCall.call(srcDst);
+    JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_inc);
+    slowPathCall.call();

 }
 
 void JIT::emit_op_dec(Instruction* currentInstruction)
 {
 }
 
 void JIT::emit_op_dec(Instruction* currentInstruction)
 {

-    unsigned srcDst = currentInstruction[1].u.operand;
+    int srcDst = currentInstruction[1].u.operand;

 
     emitLoad(srcDst, regT1, regT0);
 
     addSlowCase(branch32(NotEqual, regT1, TrustedImm32(JSValue::Int32Tag)));
     addSlowCase(branchSub32(Overflow, TrustedImm32(1), regT0));
 
     emitLoad(srcDst, regT1, regT0);
 
     addSlowCase(branch32(NotEqual, regT1, TrustedImm32(JSValue::Int32Tag)));
     addSlowCase(branchSub32(Overflow, TrustedImm32(1), regT0));

-    emitStoreAndMapInt32(srcDst, regT1, regT0, true, OPCODE_LENGTH(op_dec));
+    emitStoreInt32(srcDst, regT0, true);

 }
 
 void JIT::emitSlow_op_dec(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
 }
 
 void JIT::emitSlow_op_dec(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {

-    unsigned srcDst = currentInstruction[1].u.operand;
-

     linkSlowCase(iter); // int32 check
     linkSlowCase(iter); // overflow check
 
     linkSlowCase(iter); // int32 check
     linkSlowCase(iter); // overflow check
 

-    JITStubCall stubCall(this, cti_op_dec);
-    stubCall.addArgument(srcDst);
-    stubCall.call(srcDst);
+    JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_dec);
+    slowPathCall.call();

 }
 
 // Addition (+)
 
 void JIT::emit_op_add(Instruction* currentInstruction)
 {
 }
 
 // Addition (+)
 
 void JIT::emit_op_add(Instruction* currentInstruction)
 {

-    unsigned dst = currentInstruction[1].u.operand;
-    unsigned op1 = currentInstruction[2].u.operand;
-    unsigned op2 = currentInstruction[3].u.operand;
+    int dst = currentInstruction[1].u.operand;
+    int op1 = currentInstruction[2].u.operand;
+    int op2 = currentInstruction[3].u.operand;

     OperandTypes types = OperandTypes::fromInt(currentInstruction[4].u.operand);
 
     if (!types.first().mightBeNumber() || !types.second().mightBeNumber()) {
         addSlowCase();
     OperandTypes types = OperandTypes::fromInt(currentInstruction[4].u.operand);
 
     if (!types.first().mightBeNumber() || !types.second().mightBeNumber()) {
         addSlowCase();

-        JITStubCall stubCall(this, cti_op_add);
-        stubCall.addArgument(op1);
-        stubCall.addArgument(op2);
-        stubCall.call(dst);
+        JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_add);
+        slowPathCall.call();

         return;
     }
 
     JumpList notInt32Op1;
     JumpList notInt32Op2;
 
         return;
     }
 
     JumpList notInt32Op1;
     JumpList notInt32Op2;
 

-    unsigned op;
+    int op;

     int32_t constant;
     if (getOperandConstantImmediateInt(op1, op2, op, constant)) {
         emitAdd32Constant(dst, op, constant, op == op1 ? types.first() : types.second());
     int32_t constant;
     if (getOperandConstantImmediateInt(op1, op2, op, constant)) {
         emitAdd32Constant(dst, op, constant, op == op1 ? types.first() : types.second());


@@ -543,7 +525,7 @@ void JIT::emit_op_add(Instruction* currentInstruction)
     end.link(this);
 }
 
     end.link(this);
 }
 

-void JIT::emitAdd32Constant(unsigned dst, unsigned op, int32_t constant, ResultType opType)
+void JIT::emitAdd32Constant(int dst, int op, int32_t constant, ResultType opType)

 {
     // Int32 case.
     emitLoad(op, regT1, regT2);
 {
     // Int32 case.
     emitLoad(op, regT1, regT2);


@@ -572,9 +554,8 @@ void JIT::emitAdd32Constant(unsigned dst, unsigned op, int32_t constant, ResultT
 
 void JIT::emitSlow_op_add(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
 
 void JIT::emitSlow_op_add(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {

-    unsigned dst = currentInstruction[1].u.operand;
-    unsigned op1 = currentInstruction[2].u.operand;
-    unsigned op2 = currentInstruction[3].u.operand;
+    int op1 = currentInstruction[2].u.operand;
+    int op2 = currentInstruction[3].u.operand;

     OperandTypes types = OperandTypes::fromInt(currentInstruction[4].u.operand);
 
     if (!types.first().mightBeNumber() || !types.second().mightBeNumber()) {
     OperandTypes types = OperandTypes::fromInt(currentInstruction[4].u.operand);
 
     if (!types.first().mightBeNumber() || !types.second().mightBeNumber()) {


@@ -582,7 +563,7 @@ void JIT::emitSlow_op_add(Instruction* currentInstruction, Vector<SlowCaseEntry>
         return;
     }
 
         return;
     }
 

-    unsigned op;
+    int op;

     int32_t constant;
     if (getOperandConstantImmediateInt(op1, op2, op, constant)) {
         linkSlowCase(iter); // overflow check
     int32_t constant;
     if (getOperandConstantImmediateInt(op1, op2, op, constant)) {
         linkSlowCase(iter); // overflow check


@@ -611,19 +592,17 @@ void JIT::emitSlow_op_add(Instruction* currentInstruction, Vector<SlowCaseEntry>
         }
     }
 
         }
     }
 

-    JITStubCall stubCall(this, cti_op_add);
-    stubCall.addArgument(op1);
-    stubCall.addArgument(op2);
-    stubCall.call(dst);
+    JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_add);
+    slowPathCall.call();

 }
 
 // Subtraction (-)
 
 void JIT::emit_op_sub(Instruction* currentInstruction)
 {
 }
 
 // Subtraction (-)
 
 void JIT::emit_op_sub(Instruction* currentInstruction)
 {

-    unsigned dst = currentInstruction[1].u.operand;
-    unsigned op1 = currentInstruction[2].u.operand;
-    unsigned op2 = currentInstruction[3].u.operand;
+    int dst = currentInstruction[1].u.operand;
+    int op1 = currentInstruction[2].u.operand;
+    int op2 = currentInstruction[3].u.operand;

     OperandTypes types = OperandTypes::fromInt(currentInstruction[4].u.operand);
 
     JumpList notInt32Op1;
     OperandTypes types = OperandTypes::fromInt(currentInstruction[4].u.operand);
 
     JumpList notInt32Op1;


@@ -654,17 +633,12 @@ void JIT::emit_op_sub(Instruction* currentInstruction)
     end.link(this);
 }
 
     end.link(this);
 }
 

-void JIT::emitSub32Constant(unsigned dst, unsigned op, int32_t constant, ResultType opType)
+void JIT::emitSub32Constant(int dst, int op, int32_t constant, ResultType opType)

 {
     // Int32 case.
     emitLoad(op, regT1, regT0);
     Jump notInt32 = branch32(NotEqual, regT1, TrustedImm32(JSValue::Int32Tag));
 {
     // Int32 case.
     emitLoad(op, regT1, regT0);
     Jump notInt32 = branch32(NotEqual, regT1, TrustedImm32(JSValue::Int32Tag));

-#if ENABLE(JIT_CONSTANT_BLINDING)
-    addSlowCase(branchSub32(Overflow, regT0, Imm32(constant), regT2, regT3));
-#else
-    addSlowCase(branchSub32(Overflow, regT0, Imm32(constant), regT2));
-#endif
-    
+    addSlowCase(branchSub32(Overflow, regT0, Imm32(constant), regT2, regT3));   

     emitStoreInt32(dst, regT2, (op == dst));
 
     // Double case.
     emitStoreInt32(dst, regT2, (op == dst));
 
     // Double case.


@@ -688,9 +662,7 @@ void JIT::emitSub32Constant(unsigned dst, unsigned op, int32_t constant, ResultT
 
 void JIT::emitSlow_op_sub(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
 
 void JIT::emitSlow_op_sub(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {

-    unsigned dst = currentInstruction[1].u.operand;
-    unsigned op1 = currentInstruction[2].u.operand;
-    unsigned op2 = currentInstruction[3].u.operand;
+    int op2 = currentInstruction[3].u.operand;

     OperandTypes types = OperandTypes::fromInt(currentInstruction[4].u.operand);
 
     if (isOperandConstantImmediateInt(op2)) {
     OperandTypes types = OperandTypes::fromInt(currentInstruction[4].u.operand);
 
     if (isOperandConstantImmediateInt(op2)) {


@@ -715,13 +687,11 @@ void JIT::emitSlow_op_sub(Instruction* currentInstruction, Vector<SlowCaseEntry>
         }
     }
 
         }
     }
 

-    JITStubCall stubCall(this, cti_op_sub);
-    stubCall.addArgument(op1);
-    stubCall.addArgument(op2);
-    stubCall.call(dst);
+    JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_sub);
+    slowPathCall.call();

 }
 
 }
 

-void JIT::emitBinaryDoubleOp(OpcodeID opcodeID, unsigned dst, unsigned op1, unsigned op2, OperandTypes types, JumpList& notInt32Op1, JumpList& notInt32Op2, bool op1IsInRegisters, bool op2IsInRegisters)
+void JIT::emitBinaryDoubleOp(OpcodeID opcodeID, int dst, int op1, int op2, OperandTypes types, JumpList& notInt32Op1, JumpList& notInt32Op2, bool op1IsInRegisters, bool op2IsInRegisters)

 {
     JumpList end;
 
 {
     JumpList end;
 


@@ -772,7 +742,6 @@ void JIT::emitBinaryDoubleOp(OpcodeID opcodeID, unsigned dst, unsigned op1, unsi
                 emitLoadDouble(op1, fpRegT1);
                 divDouble(fpRegT0, fpRegT1);
 
                 emitLoadDouble(op1, fpRegT1);
                 divDouble(fpRegT0, fpRegT1);
 

-#if ENABLE(VALUE_PROFILER)

                 // Is the result actually an integer? The DFG JIT would really like to know. If it's
                 // not an integer, we increment a count. If this together with the slow case counter
                 // are below threshold then the DFG JIT will compile this division with a specualtion
                 // Is the result actually an integer? The DFG JIT would really like to know. If it's
                 // not an integer, we increment a count. If this together with the slow case counter
                 // are below threshold then the DFG JIT will compile this division with a specualtion


@@ -796,9 +765,6 @@ void JIT::emitBinaryDoubleOp(OpcodeID opcodeID, unsigned dst, unsigned op1, unsi
                 add32(TrustedImm32(1), AbsoluteAddress(&m_codeBlock->specialFastCaseProfileForBytecodeOffset(m_bytecodeOffset)->m_counter));
                 emitStoreDouble(dst, fpRegT1);
                 isInteger.link(this);
                 add32(TrustedImm32(1), AbsoluteAddress(&m_codeBlock->specialFastCaseProfileForBytecodeOffset(m_bytecodeOffset)->m_counter));
                 emitStoreDouble(dst, fpRegT1);
                 isInteger.link(this);

-#else
-                emitStoreDouble(dst, fpRegT1);
-#endif

                 break;
             }
             case op_jless:
                 break;
             }
             case op_jless:


@@ -876,7 +842,6 @@ void JIT::emitBinaryDoubleOp(OpcodeID opcodeID, unsigned dst, unsigned op1, unsi
             case op_div: {
                 emitLoadDouble(op2, fpRegT2);
                 divDouble(fpRegT2, fpRegT0);
             case op_div: {
                 emitLoadDouble(op2, fpRegT2);
                 divDouble(fpRegT2, fpRegT0);

-#if ENABLE(VALUE_PROFILER)

                 // Is the result actually an integer? The DFG JIT would really like to know. If it's
                 // not an integer, we increment a count. If this together with the slow case counter
                 // are below threshold then the DFG JIT will compile this division with a specualtion
                 // Is the result actually an integer? The DFG JIT would really like to know. If it's
                 // not an integer, we increment a count. If this together with the slow case counter
                 // are below threshold then the DFG JIT will compile this division with a specualtion


@@ -900,9 +865,6 @@ void JIT::emitBinaryDoubleOp(OpcodeID opcodeID, unsigned dst, unsigned op1, unsi
                 add32(TrustedImm32(1), AbsoluteAddress(&m_codeBlock->specialFastCaseProfileForBytecodeOffset(m_bytecodeOffset)->m_counter));
                 emitStoreDouble(dst, fpRegT0);
                 isInteger.link(this);
                 add32(TrustedImm32(1), AbsoluteAddress(&m_codeBlock->specialFastCaseProfileForBytecodeOffset(m_bytecodeOffset)->m_counter));
                 emitStoreDouble(dst, fpRegT0);
                 isInteger.link(this);

-#else
-                emitStoreDouble(dst, fpRegT0);
-#endif

                 break;
             }
             case op_jless:
                 break;
             }
             case op_jless:


@@ -949,14 +911,12 @@ void JIT::emitBinaryDoubleOp(OpcodeID opcodeID, unsigned dst, unsigned op1, unsi
 
 void JIT::emit_op_mul(Instruction* currentInstruction)
 {
 
 void JIT::emit_op_mul(Instruction* currentInstruction)
 {

-    unsigned dst = currentInstruction[1].u.operand;
-    unsigned op1 = currentInstruction[2].u.operand;
-    unsigned op2 = currentInstruction[3].u.operand;
+    int dst = currentInstruction[1].u.operand;
+    int op1 = currentInstruction[2].u.operand;
+    int op2 = currentInstruction[3].u.operand;

     OperandTypes types = OperandTypes::fromInt(currentInstruction[4].u.operand);
 
     OperandTypes types = OperandTypes::fromInt(currentInstruction[4].u.operand);
 

-#if ENABLE(VALUE_PROFILER)

     m_codeBlock->addSpecialFastCaseProfile(m_bytecodeOffset);
     m_codeBlock->addSpecialFastCaseProfile(m_bytecodeOffset);

-#endif

 
     JumpList notInt32Op1;
     JumpList notInt32Op2;
 
     JumpList notInt32Op1;
     JumpList notInt32Op2;


@@ -985,9 +945,9 @@ void JIT::emit_op_mul(Instruction* currentInstruction)
 
 void JIT::emitSlow_op_mul(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
 
 void JIT::emitSlow_op_mul(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {

-    unsigned dst = currentInstruction[1].u.operand;
-    unsigned op1 = currentInstruction[2].u.operand;
-    unsigned op2 = currentInstruction[3].u.operand;
+    int dst = currentInstruction[1].u.operand;
+    int op1 = currentInstruction[2].u.operand;
+    int op2 = currentInstruction[3].u.operand;

     OperandTypes types = OperandTypes::fromInt(currentInstruction[4].u.operand);
 
     Jump overflow = getSlowCase(iter); // overflow check
     OperandTypes types = OperandTypes::fromInt(currentInstruction[4].u.operand);
 
     Jump overflow = getSlowCase(iter); // overflow check


@@ -999,12 +959,10 @@ void JIT::emitSlow_op_mul(Instruction* currentInstruction, Vector<SlowCaseEntry>
     emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_mul));
 
     negZero.link(this);
     emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_mul));
 
     negZero.link(this);

-#if ENABLE(VALUE_PROFILER)

     // We only get here if we have a genuine negative zero. Record this,
     // so that the speculative JIT knows that we failed speculation
     // because of a negative zero.
     add32(TrustedImm32(1), AbsoluteAddress(&m_codeBlock->specialFastCaseProfileForBytecodeOffset(m_bytecodeOffset)->m_counter));
     // We only get here if we have a genuine negative zero. Record this,
     // so that the speculative JIT knows that we failed speculation
     // because of a negative zero.
     add32(TrustedImm32(1), AbsoluteAddress(&m_codeBlock->specialFastCaseProfileForBytecodeOffset(m_bytecodeOffset)->m_counter));

-#endif

     overflow.link(this);
 
     if (!supportsFloatingPoint()) {
     overflow.link(this);
 
     if (!supportsFloatingPoint()) {


@@ -1022,25 +980,20 @@ void JIT::emitSlow_op_mul(Instruction* currentInstruction, Vector<SlowCaseEntry>
         }
     }
 
         }
     }
 

-    Label jitStubCall(this);
-    JITStubCall stubCall(this, cti_op_mul);
-    stubCall.addArgument(op1);
-    stubCall.addArgument(op2);
-    stubCall.call(dst);
+    JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_mul);
+    slowPathCall.call();

 }
 
 // Division (/)
 
 void JIT::emit_op_div(Instruction* currentInstruction)
 {
 }
 
 // Division (/)
 
 void JIT::emit_op_div(Instruction* currentInstruction)
 {

-    unsigned dst = currentInstruction[1].u.operand;
-    unsigned op1 = currentInstruction[2].u.operand;
-    unsigned op2 = currentInstruction[3].u.operand;
+    int dst = currentInstruction[1].u.operand;
+    int op1 = currentInstruction[2].u.operand;
+    int op2 = currentInstruction[3].u.operand;

     OperandTypes types = OperandTypes::fromInt(currentInstruction[4].u.operand);
 
     OperandTypes types = OperandTypes::fromInt(currentInstruction[4].u.operand);
 

-#if ENABLE(VALUE_PROFILER)

     m_codeBlock->addSpecialFastCaseProfile(m_bytecodeOffset);
     m_codeBlock->addSpecialFastCaseProfile(m_bytecodeOffset);

-#endif

 
     if (!supportsFloatingPoint()) {
         addSlowCase(jump());
 
     if (!supportsFloatingPoint()) {
         addSlowCase(jump());


@@ -1061,7 +1014,6 @@ void JIT::emit_op_div(Instruction* currentInstruction)
     convertInt32ToDouble(regT0, fpRegT0);
     convertInt32ToDouble(regT2, fpRegT1);
     divDouble(fpRegT1, fpRegT0);
     convertInt32ToDouble(regT0, fpRegT0);
     convertInt32ToDouble(regT2, fpRegT1);
     divDouble(fpRegT1, fpRegT0);

-#if ENABLE(VALUE_PROFILER)

     // Is the result actually an integer? The DFG JIT would really like to know. If it's
     // not an integer, we increment a count. If this together with the slow case counter
     // are below threshold then the DFG JIT will compile this division with a specualtion
     // Is the result actually an integer? The DFG JIT would really like to know. If it's
     // not an integer, we increment a count. If this together with the slow case counter
     // are below threshold then the DFG JIT will compile this division with a specualtion


@@ -1084,9 +1036,6 @@ void JIT::emit_op_div(Instruction* currentInstruction)
     notInteger.link(this);
     add32(TrustedImm32(1), AbsoluteAddress(&m_codeBlock->specialFastCaseProfileForBytecodeOffset(m_bytecodeOffset)->m_counter));
     emitStoreDouble(dst, fpRegT0);
     notInteger.link(this);
     add32(TrustedImm32(1), AbsoluteAddress(&m_codeBlock->specialFastCaseProfileForBytecodeOffset(m_bytecodeOffset)->m_counter));
     emitStoreDouble(dst, fpRegT0);

-#else
-    emitStoreDouble(dst, fpRegT0);
-#endif

     end.append(jump());
 
     // Double divide.
     end.append(jump());
 
     // Double divide.


@@ -1096,9 +1045,6 @@ void JIT::emit_op_div(Instruction* currentInstruction)
 
 void JIT::emitSlow_op_div(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
 
 void JIT::emitSlow_op_div(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {

-    unsigned dst = currentInstruction[1].u.operand;
-    unsigned op1 = currentInstruction[2].u.operand;
-    unsigned op2 = currentInstruction[3].u.operand;

     OperandTypes types = OperandTypes::fromInt(currentInstruction[4].u.operand);
 
     if (!supportsFloatingPoint())
     OperandTypes types = OperandTypes::fromInt(currentInstruction[4].u.operand);
 
     if (!supportsFloatingPoint())


@@ -1113,10 +1059,8 @@ void JIT::emitSlow_op_div(Instruction* currentInstruction, Vector<SlowCaseEntry>
         }
     }
 
         }
     }
 

-    JITStubCall stubCall(this, cti_op_div);
-    stubCall.addArgument(op1);
-    stubCall.addArgument(op2);
-    stubCall.call(dst);
+    JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_div);
+    slowPathCall.call();

 }
 
 // Mod (%)
 }
 
 // Mod (%)


@@ -1125,11 +1069,11 @@ void JIT::emitSlow_op_div(Instruction* currentInstruction, Vector<SlowCaseEntry>
 
 void JIT::emit_op_mod(Instruction* currentInstruction)
 {
 
 void JIT::emit_op_mod(Instruction* currentInstruction)
 {

-    unsigned dst = currentInstruction[1].u.operand;
-    unsigned op1 = currentInstruction[2].u.operand;
-    unsigned op2 = currentInstruction[3].u.operand;
-

 #if CPU(X86) || CPU(X86_64)
 #if CPU(X86) || CPU(X86_64)

+    int dst = currentInstruction[1].u.operand;
+    int op1 = currentInstruction[2].u.operand;
+    int op2 = currentInstruction[3].u.operand;
+

     // Make sure registers are correct for x86 IDIV instructions.
     ASSERT(regT0 == X86Registers::eax);
     ASSERT(regT1 == X86Registers::edx);
     // Make sure registers are correct for x86 IDIV instructions.
     ASSERT(regT0 == X86Registers::eax);
     ASSERT(regT1 == X86Registers::edx);


@@ -1152,28 +1096,21 @@ void JIT::emit_op_mod(Instruction* currentInstruction)
     numeratorPositive.link(this);
     emitStoreInt32(dst, regT1, (op1 == dst || op2 == dst));
 #else
     numeratorPositive.link(this);
     emitStoreInt32(dst, regT1, (op1 == dst || op2 == dst));
 #else

-    JITStubCall stubCall(this, cti_op_mod);
-    stubCall.addArgument(op1);
-    stubCall.addArgument(op2);
-    stubCall.call(dst);
+    JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_mod);
+    slowPathCall.call();

 #endif
 }
 
 void JIT::emitSlow_op_mod(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
 #if CPU(X86) || CPU(X86_64)
 #endif
 }
 
 void JIT::emitSlow_op_mod(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
 #if CPU(X86) || CPU(X86_64)

-    unsigned result = currentInstruction[1].u.operand;
-    unsigned op1 = currentInstruction[2].u.operand;
-    unsigned op2 = currentInstruction[3].u.operand;

     linkSlowCase(iter);
     linkSlowCase(iter);
     linkSlowCase(iter);
     linkSlowCase(iter);
     linkSlowCase(iter);
     linkSlowCase(iter);
     linkSlowCase(iter);
     linkSlowCase(iter);
     linkSlowCase(iter);
     linkSlowCase(iter);

-    JITStubCall stubCall(this, cti_op_mod);
-    stubCall.addArgument(op1);
-    stubCall.addArgument(op2);
-    stubCall.call(result);
+    JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_mod);
+    slowPathCall.call();

 #else
     UNUSED_PARAM(currentInstruction);
     UNUSED_PARAM(iter);
 #else
     UNUSED_PARAM(currentInstruction);
     UNUSED_PARAM(iter);