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JavaScriptCore-7601.1.46.3.tar.gz
[apple/javascriptcore.git] / jit / JITArithmetic.cpp
diff --git a/jit/JITArithmetic.cpp b/jit/JITArithmetic.cpp
index a9390e35f2449d5028c33311689386baf3511ae6..167e4130159ca1856192c5e4ed1ebf0ebcee26f6 100644 (file)
--- a/jit/JITArithmetic.cpp
+++ b/jit/JITArithmetic.cpp
@@ -29,27 +29,24 @@
 #include "JIT.h"
 
 #include "CodeBlock.h"
 #include "JIT.h"
 
 #include "CodeBlock.h"
-#include "JITInlineMethods.h"
-#include "JITStubCall.h"
+#include "JITInlines.h"
+#include "JITOperations.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 "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_jless(Instruction* currentInstruction)
 {
 
 namespace JSC {
 
 void JIT::emit_op_jless(Instruction* currentInstruction)
 {
-    unsigned op1 = currentInstruction[1].u.operand;
-    unsigned op2 = currentInstruction[2].u.operand;
+    int op1 = currentInstruction[1].u.operand;
+    int op2 = currentInstruction[2].u.operand;
     unsigned target = currentInstruction[3].u.operand;
 
     emit_compareAndJump(op_jless, op1, op2, target, LessThan);
     unsigned target = currentInstruction[3].u.operand;
 
     emit_compareAndJump(op_jless, op1, op2, target, LessThan);
@@ -57,8 +54,8 @@ void JIT::emit_op_jless(Instruction* currentInstruction)
 
 void JIT::emit_op_jlesseq(Instruction* currentInstruction)
 {
 
 void JIT::emit_op_jlesseq(Instruction* currentInstruction)
 {
-    unsigned op1 = currentInstruction[1].u.operand;
-    unsigned op2 = currentInstruction[2].u.operand;
+    int op1 = currentInstruction[1].u.operand;
+    int op2 = currentInstruction[2].u.operand;
     unsigned target = currentInstruction[3].u.operand;
 
     emit_compareAndJump(op_jlesseq, op1, op2, target, LessThanOrEqual);
     unsigned target = currentInstruction[3].u.operand;
 
     emit_compareAndJump(op_jlesseq, op1, op2, target, LessThanOrEqual);
@@ -66,8 +63,8 @@ void JIT::emit_op_jlesseq(Instruction* currentInstruction)
 
 void JIT::emit_op_jgreater(Instruction* currentInstruction)
 {
 
 void JIT::emit_op_jgreater(Instruction* currentInstruction)
 {
-    unsigned op1 = currentInstruction[1].u.operand;
-    unsigned op2 = currentInstruction[2].u.operand;
+    int op1 = currentInstruction[1].u.operand;
+    int op2 = currentInstruction[2].u.operand;
     unsigned target = currentInstruction[3].u.operand;
 
     emit_compareAndJump(op_jgreater, op1, op2, target, GreaterThan);
     unsigned target = currentInstruction[3].u.operand;
 
     emit_compareAndJump(op_jgreater, op1, op2, target, GreaterThan);
@@ -75,8 +72,8 @@ void JIT::emit_op_jgreater(Instruction* currentInstruction)
 
 void JIT::emit_op_jgreatereq(Instruction* currentInstruction)
 {
 
 void JIT::emit_op_jgreatereq(Instruction* currentInstruction)
 {
-    unsigned op1 = currentInstruction[1].u.operand;
-    unsigned op2 = currentInstruction[2].u.operand;
+    int op1 = currentInstruction[1].u.operand;
+    int op2 = currentInstruction[2].u.operand;
     unsigned target = currentInstruction[3].u.operand;
 
     emit_compareAndJump(op_jgreatereq, op1, op2, target, GreaterThanOrEqual);
     unsigned target = currentInstruction[3].u.operand;
 
     emit_compareAndJump(op_jgreatereq, op1, op2, target, GreaterThanOrEqual);
@@ -84,8 +81,8 @@ void JIT::emit_op_jgreatereq(Instruction* currentInstruction)
 
 void JIT::emit_op_jnless(Instruction* currentInstruction)
 {
 
 void JIT::emit_op_jnless(Instruction* currentInstruction)
 {
-    unsigned op1 = currentInstruction[1].u.operand;
-    unsigned op2 = currentInstruction[2].u.operand;
+    int op1 = currentInstruction[1].u.operand;
+    int op2 = currentInstruction[2].u.operand;
     unsigned target = currentInstruction[3].u.operand;
 
     emit_compareAndJump(op_jnless, op1, op2, target, GreaterThanOrEqual);
     unsigned target = currentInstruction[3].u.operand;
 
     emit_compareAndJump(op_jnless, op1, op2, target, GreaterThanOrEqual);
@@ -93,8 +90,8 @@ void JIT::emit_op_jnless(Instruction* currentInstruction)
 
 void JIT::emit_op_jnlesseq(Instruction* currentInstruction)
 {
 
 void JIT::emit_op_jnlesseq(Instruction* currentInstruction)
 {
-    unsigned op1 = currentInstruction[1].u.operand;
-    unsigned op2 = currentInstruction[2].u.operand;
+    int op1 = currentInstruction[1].u.operand;
+    int op2 = currentInstruction[2].u.operand;
     unsigned target = currentInstruction[3].u.operand;
 
     emit_compareAndJump(op_jnlesseq, op1, op2, target, GreaterThan);
     unsigned target = currentInstruction[3].u.operand;
 
     emit_compareAndJump(op_jnlesseq, op1, op2, target, GreaterThan);
@@ -102,8 +99,8 @@ void JIT::emit_op_jnlesseq(Instruction* currentInstruction)
 
 void JIT::emit_op_jngreater(Instruction* currentInstruction)
 {
 
 void JIT::emit_op_jngreater(Instruction* currentInstruction)
 {
-    unsigned op1 = currentInstruction[1].u.operand;
-    unsigned op2 = currentInstruction[2].u.operand;
+    int op1 = currentInstruction[1].u.operand;
+    int op2 = currentInstruction[2].u.operand;
     unsigned target = currentInstruction[3].u.operand;
 
     emit_compareAndJump(op_jngreater, op1, op2, target, LessThanOrEqual);
     unsigned target = currentInstruction[3].u.operand;
 
     emit_compareAndJump(op_jngreater, op1, op2, target, LessThanOrEqual);
@@ -111,8 +108,8 @@ void JIT::emit_op_jngreater(Instruction* currentInstruction)
 
 void JIT::emit_op_jngreatereq(Instruction* currentInstruction)
 {
 
 void JIT::emit_op_jngreatereq(Instruction* currentInstruction)
 {
-    unsigned op1 = currentInstruction[1].u.operand;
-    unsigned op2 = currentInstruction[2].u.operand;
+    int op1 = currentInstruction[1].u.operand;
+    int op2 = currentInstruction[2].u.operand;
     unsigned target = currentInstruction[3].u.operand;
 
     emit_compareAndJump(op_jngreatereq, op1, op2, target, LessThan);
     unsigned target = currentInstruction[3].u.operand;
 
     emit_compareAndJump(op_jngreatereq, op1, op2, target, LessThan);
@@ -120,82 +117,82 @@ void JIT::emit_op_jngreatereq(Instruction* currentInstruction)
 
 void JIT::emitSlow_op_jless(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
 
 void JIT::emitSlow_op_jless(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
-    unsigned op1 = currentInstruction[1].u.operand;
-    unsigned op2 = currentInstruction[2].u.operand;
+    int op1 = currentInstruction[1].u.operand;
+    int op2 = currentInstruction[2].u.operand;
     unsigned target = currentInstruction[3].u.operand;
 
     unsigned target = currentInstruction[3].u.operand;
 
-    emit_compareAndJumpSlow(op1, op2, target, DoubleLessThan, cti_op_jless, false, iter);
+    emit_compareAndJumpSlow(op1, op2, target, DoubleLessThan, operationCompareLess, false, iter);
 }
 
 void JIT::emitSlow_op_jlesseq(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
 }
 
 void JIT::emitSlow_op_jlesseq(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
-    unsigned op1 = currentInstruction[1].u.operand;
-    unsigned op2 = currentInstruction[2].u.operand;
+    int op1 = currentInstruction[1].u.operand;
+    int op2 = currentInstruction[2].u.operand;
     unsigned target = currentInstruction[3].u.operand;
 
     unsigned target = currentInstruction[3].u.operand;
 
-    emit_compareAndJumpSlow(op1, op2, target, DoubleLessThanOrEqual, cti_op_jlesseq, false, iter);
+    emit_compareAndJumpSlow(op1, op2, target, DoubleLessThanOrEqual, operationCompareLessEq, false, iter);
 }
 
 void JIT::emitSlow_op_jgreater(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
 }
 
 void JIT::emitSlow_op_jgreater(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
-    unsigned op1 = currentInstruction[1].u.operand;
-    unsigned op2 = currentInstruction[2].u.operand;
+    int op1 = currentInstruction[1].u.operand;
+    int op2 = currentInstruction[2].u.operand;
     unsigned target = currentInstruction[3].u.operand;
 
     unsigned target = currentInstruction[3].u.operand;
 
-    emit_compareAndJumpSlow(op1, op2, target, DoubleGreaterThan, cti_op_jgreater, false, iter);
+    emit_compareAndJumpSlow(op1, op2, target, DoubleGreaterThan, operationCompareGreater, false, iter);
 }
 
 void JIT::emitSlow_op_jgreatereq(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
 }
 
 void JIT::emitSlow_op_jgreatereq(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
-    unsigned op1 = currentInstruction[1].u.operand;
-    unsigned op2 = currentInstruction[2].u.operand;
+    int op1 = currentInstruction[1].u.operand;
+    int op2 = currentInstruction[2].u.operand;
     unsigned target = currentInstruction[3].u.operand;
 
     unsigned target = currentInstruction[3].u.operand;
 
-    emit_compareAndJumpSlow(op1, op2, target, DoubleGreaterThanOrEqual, cti_op_jgreatereq, false, iter);
+    emit_compareAndJumpSlow(op1, op2, target, DoubleGreaterThanOrEqual, operationCompareGreaterEq, false, iter);
 }
 
 void JIT::emitSlow_op_jnless(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
 }
 
 void JIT::emitSlow_op_jnless(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
-    unsigned op1 = currentInstruction[1].u.operand;
-    unsigned op2 = currentInstruction[2].u.operand;
+    int op1 = currentInstruction[1].u.operand;
+    int op2 = currentInstruction[2].u.operand;
     unsigned target = currentInstruction[3].u.operand;
 
     unsigned target = currentInstruction[3].u.operand;
 
-    emit_compareAndJumpSlow(op1, op2, target, DoubleGreaterThanOrEqualOrUnordered, cti_op_jless, true, iter);
+    emit_compareAndJumpSlow(op1, op2, target, DoubleGreaterThanOrEqualOrUnordered, operationCompareLess, true, iter);
 }
 
 void JIT::emitSlow_op_jnlesseq(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
 }
 
 void JIT::emitSlow_op_jnlesseq(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
-    unsigned op1 = currentInstruction[1].u.operand;
-    unsigned op2 = currentInstruction[2].u.operand;
+    int op1 = currentInstruction[1].u.operand;
+    int op2 = currentInstruction[2].u.operand;
     unsigned target = currentInstruction[3].u.operand;
 
     unsigned target = currentInstruction[3].u.operand;
 
-    emit_compareAndJumpSlow(op1, op2, target, DoubleGreaterThanOrUnordered, cti_op_jlesseq, true, iter);
+    emit_compareAndJumpSlow(op1, op2, target, DoubleGreaterThanOrUnordered, operationCompareLessEq, true, iter);
 }
 
 void JIT::emitSlow_op_jngreater(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
 }
 
 void JIT::emitSlow_op_jngreater(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
-    unsigned op1 = currentInstruction[1].u.operand;
-    unsigned op2 = currentInstruction[2].u.operand;
+    int op1 = currentInstruction[1].u.operand;
+    int op2 = currentInstruction[2].u.operand;
     unsigned target = currentInstruction[3].u.operand;
 
     unsigned target = currentInstruction[3].u.operand;
 
-    emit_compareAndJumpSlow(op1, op2, target, DoubleLessThanOrEqualOrUnordered, cti_op_jgreater, true, iter);
+    emit_compareAndJumpSlow(op1, op2, target, DoubleLessThanOrEqualOrUnordered, operationCompareGreater, true, iter);
 }
 
 void JIT::emitSlow_op_jngreatereq(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
 }
 
 void JIT::emitSlow_op_jngreatereq(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
-    unsigned op1 = currentInstruction[1].u.operand;
-    unsigned op2 = currentInstruction[2].u.operand;
+    int op1 = currentInstruction[1].u.operand;
+    int op2 = currentInstruction[2].u.operand;
     unsigned target = currentInstruction[3].u.operand;
 
     unsigned target = currentInstruction[3].u.operand;
 
-    emit_compareAndJumpSlow(op1, op2, target, DoubleLessThanOrUnordered, cti_op_jgreatereq, true, iter);
+    emit_compareAndJumpSlow(op1, op2, target, DoubleLessThanOrUnordered, operationCompareGreaterEq, true, iter);
 }
 
 #if USE(JSVALUE64)
 
 void JIT::emit_op_negate(Instruction* currentInstruction)
 {
 }
 
 #if USE(JSVALUE64)
 
 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;
 
     emitGetVirtualRegister(src, regT0);
 
 
     emitGetVirtualRegister(src, regT0);
 
@@ -209,8 +206,8 @@ void JIT::emit_op_negate(Instruction* currentInstruction)
     srcNotInt.link(this);
     emitJumpSlowCaseIfNotImmediateNumber(regT0);
 
     srcNotInt.link(this);
     emitJumpSlowCaseIfNotImmediateNumber(regT0);
 
-    move(TrustedImmPtr(reinterpret_cast<void*>(0x8000000000000000ull)), regT1);
-    xorPtr(regT1, regT0);
+    move(TrustedImm64((int64_t)0x8000000000000000ull), regT1);
+    xor64(regT1, regT0);
 
     end.link(this);
     emitPutVirtualRegister(dst);
 
     end.link(this);
     emitPutVirtualRegister(dst);
@@ -218,21 +215,18 @@ 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_op_lshift(Instruction* currentInstruction)
 {
 }
 
 void JIT::emit_op_lshift(Instruction* currentInstruction)
 {
-    unsigned result = currentInstruction[1].u.operand;
-    unsigned op1 = currentInstruction[2].u.operand;
-    unsigned op2 = currentInstruction[3].u.operand;
+    int result = currentInstruction[1].u.operand;
+    int op1 = currentInstruction[2].u.operand;
+    int op2 = currentInstruction[3].u.operand;
 
     emitGetVirtualRegisters(op1, regT0, op2, regT2);
     // FIXME: would we be better using 'emitJumpSlowCaseIfNotImmediateIntegers'? - we *probably* ought to be consistent.
 
     emitGetVirtualRegisters(op1, regT0, op2, regT2);
     // FIXME: would we be better using 'emitJumpSlowCaseIfNotImmediateIntegers'? - we *probably* ought to be consistent.
@@ -247,25 +241,17 @@ void JIT::emit_op_lshift(Instruction* currentInstruction)
 
 void JIT::emitSlow_op_lshift(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
 
 void JIT::emitSlow_op_lshift(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
-    unsigned result = currentInstruction[1].u.operand;
-    unsigned op1 = currentInstruction[2].u.operand;
-    unsigned op2 = currentInstruction[3].u.operand;
-
-    UNUSED_PARAM(op1);
-    UNUSED_PARAM(op2);
     linkSlowCase(iter);
     linkSlowCase(iter);
     linkSlowCase(iter);
     linkSlowCase(iter);
-    JITStubCall stubCall(this, cti_op_lshift);
-    stubCall.addArgument(regT0);
-    stubCall.addArgument(regT2);
-    stubCall.call(result);
+    JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_lshift);
+    slowPathCall.call();
 }
 
 void JIT::emit_op_rshift(Instruction* currentInstruction)
 {
 }
 
 void JIT::emit_op_rshift(Instruction* currentInstruction)
 {
-    unsigned result = currentInstruction[1].u.operand;
-    unsigned op1 = currentInstruction[2].u.operand;
-    unsigned op2 = currentInstruction[3].u.operand;
+    int result = currentInstruction[1].u.operand;
+    int op1 = currentInstruction[2].u.operand;
+    int op2 = currentInstruction[3].u.operand;
 
     if (isOperandConstantImmediateInt(op2)) {
         // isOperandConstantImmediateInt(op2) => 1 SlowCase
 
     if (isOperandConstantImmediateInt(op2)) {
         // isOperandConstantImmediateInt(op2) => 1 SlowCase
@@ -279,8 +265,8 @@ void JIT::emit_op_rshift(Instruction* currentInstruction)
             Jump lhsIsInt = emitJumpIfImmediateInteger(regT0);
             // supportsFloatingPoint() && USE(JSVALUE64) => 3 SlowCases
             addSlowCase(emitJumpIfNotImmediateNumber(regT0));
             Jump lhsIsInt = emitJumpIfImmediateInteger(regT0);
             // supportsFloatingPoint() && USE(JSVALUE64) => 3 SlowCases
             addSlowCase(emitJumpIfNotImmediateNumber(regT0));
-            addPtr(tagTypeNumberRegister, regT0);
-            movePtrToDouble(regT0, fpRegT0);
+            add64(tagTypeNumberRegister, regT0);
+            move64ToDouble(regT0, fpRegT0);
             addSlowCase(branchTruncateDoubleToInt32(fpRegT0, regT0));
             lhsIsInt.link(this);
             emitJumpSlowCaseIfNotImmediateInteger(regT2);
             addSlowCase(branchTruncateDoubleToInt32(fpRegT0, regT0));
             lhsIsInt.link(this);
             emitJumpSlowCaseIfNotImmediateInteger(regT2);
@@ -298,132 +284,105 @@ void JIT::emit_op_rshift(Instruction* currentInstruction)
 
 void JIT::emitSlow_op_rshift(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
 
 void JIT::emitSlow_op_rshift(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
-    unsigned result = currentInstruction[1].u.operand;
-    unsigned op1 = currentInstruction[2].u.operand;
-    unsigned op2 = currentInstruction[3].u.operand;
-
-    JITStubCall stubCall(this, cti_op_rshift);
+    int op2 = currentInstruction[3].u.operand;
 
 
-    if (isOperandConstantImmediateInt(op2)) {
+    if (isOperandConstantImmediateInt(op2))
         linkSlowCase(iter);
         linkSlowCase(iter);
-        stubCall.addArgument(regT0);
-        stubCall.addArgument(op2, regT2);
-    } else {
+
+    else {
         if (supportsFloatingPointTruncate()) {
             linkSlowCase(iter);
             linkSlowCase(iter);
             linkSlowCase(iter);
         if (supportsFloatingPointTruncate()) {
             linkSlowCase(iter);
             linkSlowCase(iter);
             linkSlowCase(iter);
-            // We're reloading op1 to regT0 as we can no longer guarantee that
-            // we have not munged the operand.  It may have already been shifted
-            // correctly, but it still will not have been tagged.
-            stubCall.addArgument(op1, regT0);
-            stubCall.addArgument(regT2);
         } else {
             linkSlowCase(iter);
             linkSlowCase(iter);
         } else {
             linkSlowCase(iter);
             linkSlowCase(iter);
-            stubCall.addArgument(regT0);
-            stubCall.addArgument(regT2);
         }
     }
 
         }
     }
 
-    stubCall.call(result);
+    JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_rshift);
+    slowPathCall.call();
 }
 
 void JIT::emit_op_urshift(Instruction* currentInstruction)
 {
 }
 
 void JIT::emit_op_urshift(Instruction* currentInstruction)
 {
-    unsigned dst = currentInstruction[1].u.operand;
-    unsigned op1 = currentInstruction[2].u.operand;
-    unsigned op2 = currentInstruction[3].u.operand;
+    int result = currentInstruction[1].u.operand;
+    int op1 = currentInstruction[2].u.operand;
+    int op2 = currentInstruction[3].u.operand;
 
 
-    // Slow case of urshift makes assumptions about what registers hold the
-    // shift arguments, so any changes must be updated there as well.
     if (isOperandConstantImmediateInt(op2)) {
     if (isOperandConstantImmediateInt(op2)) {
+        // isOperandConstantImmediateInt(op2) => 1 SlowCase
         emitGetVirtualRegister(op1, regT0);
         emitJumpSlowCaseIfNotImmediateInteger(regT0);
         emitGetVirtualRegister(op1, regT0);
         emitJumpSlowCaseIfNotImmediateInteger(regT0);
-        emitFastArithImmToInt(regT0);
-        int shift = getConstantOperand(op2).asInt32();
-        if (shift)
-            urshift32(Imm32(shift & 0x1f), regT0);
-        // unsigned shift < 0 or shift = k*2^32 may result in (essentially)
-        // a toUint conversion, which can result in a value we can represent
-        // as an immediate int.
-        if (shift < 0 || !(shift & 31))
-            addSlowCase(branch32(LessThan, regT0, TrustedImm32(0)));
-        emitFastArithReTagImmediate(regT0, regT0);
-        emitPutVirtualRegister(dst, regT0);
-        return;
+        // Mask with 0x1f as per ecma-262 11.7.2 step 7.
+        urshift32(Imm32(getConstantOperandImmediateInt(op2) & 0x1f), regT0);
+    } else {
+        emitGetVirtualRegisters(op1, regT0, op2, regT2);
+        if (supportsFloatingPointTruncate()) {
+            Jump lhsIsInt = emitJumpIfImmediateInteger(regT0);
+            // supportsFloatingPoint() && USE(JSVALUE64) => 3 SlowCases
+            addSlowCase(emitJumpIfNotImmediateNumber(regT0));
+            add64(tagTypeNumberRegister, regT0);
+            move64ToDouble(regT0, fpRegT0);
+            addSlowCase(branchTruncateDoubleToInt32(fpRegT0, regT0));
+            lhsIsInt.link(this);
+            emitJumpSlowCaseIfNotImmediateInteger(regT2);
+        } else {
+            // !supportsFloatingPoint() => 2 SlowCases
+            emitJumpSlowCaseIfNotImmediateInteger(regT0);
+            emitJumpSlowCaseIfNotImmediateInteger(regT2);
+        }
+        emitFastArithImmToInt(regT2);
+        urshift32(regT2, regT0);
     }
     }
-    emitGetVirtualRegisters(op1, regT0, op2, regT1);
-    if (!isOperandConstantImmediateInt(op1))
-        emitJumpSlowCaseIfNotImmediateInteger(regT0);
-    emitJumpSlowCaseIfNotImmediateInteger(regT1);
-    emitFastArithImmToInt(regT0);
-    emitFastArithImmToInt(regT1);
-    urshift32(regT1, regT0);
-    addSlowCase(branch32(LessThan, regT0, TrustedImm32(0)));
-    emitFastArithReTagImmediate(regT0, regT0);
-    emitPutVirtualRegister(dst, regT0);
+    emitFastArithIntToImmNoCheck(regT0, regT0);
+    emitPutVirtualRegister(result);
 }
 
 void JIT::emitSlow_op_urshift(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
 }
 
 void JIT::emitSlow_op_urshift(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
-    unsigned dst = currentInstruction[1].u.operand;
-    unsigned op1 = currentInstruction[2].u.operand;
-    unsigned op2 = currentInstruction[3].u.operand;
-    if (isOperandConstantImmediateInt(op2)) {
-        int shift = getConstantOperand(op2).asInt32();
-        // op1 = regT0
-        linkSlowCase(iter); // int32 check
+    int op2 = currentInstruction[3].u.operand;
+
+    if (isOperandConstantImmediateInt(op2))
+        linkSlowCase(iter);
+
+    else {
         if (supportsFloatingPointTruncate()) {
         if (supportsFloatingPointTruncate()) {
-            JumpList failures;
-            failures.append(emitJumpIfNotImmediateNumber(regT0)); // op1 is not a double
-            addPtr(tagTypeNumberRegister, regT0);
-            movePtrToDouble(regT0, fpRegT0);
-            failures.append(branchTruncateDoubleToInt32(fpRegT0, regT0));
-            if (shift)
-                urshift32(Imm32(shift & 0x1f), regT0);
-            if (shift < 0 || !(shift & 31))
-                failures.append(branch32(LessThan, regT0, TrustedImm32(0)));
-            emitFastArithReTagImmediate(regT0, regT0);
-            emitPutVirtualRegister(dst, regT0);
-            emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_rshift));
-            failures.link(this);
-        }
-        if (shift < 0 || !(shift & 31))
-            linkSlowCase(iter); // failed to box in hot path
-    } else {
-        // op1 = regT0
-        // op2 = regT1
-        if (!isOperandConstantImmediateInt(op1)) {
-            linkSlowCase(iter); // int32 check -- op1 is not an int
-            if (supportsFloatingPointTruncate()) {
-                JumpList failures;
-                failures.append(emitJumpIfNotImmediateNumber(regT0)); // op1 is not a double
-                addPtr(tagTypeNumberRegister, regT0);
-                movePtrToDouble(regT0, fpRegT0);
-                failures.append(branchTruncateDoubleToInt32(fpRegT0, regT0));
-                failures.append(emitJumpIfNotImmediateInteger(regT1)); // op2 is not an int
-                emitFastArithImmToInt(regT1);
-                urshift32(regT1, regT0);
-                failures.append(branch32(LessThan, regT0, TrustedImm32(0)));
-                emitFastArithReTagImmediate(regT0, regT0);
-                emitPutVirtualRegister(dst, regT0);
-                emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_rshift));
-                failures.link(this);
-            }
+            linkSlowCase(iter);
+            linkSlowCase(iter);
+            linkSlowCase(iter);
+        } else {
+            linkSlowCase(iter);
+            linkSlowCase(iter);
         }
         }
-        
-        linkSlowCase(iter); // int32 check - op2 is not an int
-        linkSlowCase(iter); // Can't represent unsigned result as an immediate
     }
     }
+
+    JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_urshift);
+    slowPathCall.call();
+}
+
+void JIT::emit_op_unsigned(Instruction* currentInstruction)
+{
+    int result = currentInstruction[1].u.operand;
+    int op1 = currentInstruction[2].u.operand;
+    
+    emitGetVirtualRegister(op1, regT0);
+    emitJumpSlowCaseIfNotImmediateInteger(regT0);
+    addSlowCase(branch32(LessThan, regT0, TrustedImm32(0)));
+    emitFastArithReTagImmediate(regT0, regT0);
+    emitPutVirtualRegister(result, regT0);
+}
+
+void JIT::emitSlow_op_unsigned(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
+{
+    linkSlowCase(iter);
+    linkSlowCase(iter);
     
     
-    JITStubCall stubCall(this, cti_op_urshift);
-    stubCall.addArgument(op1, regT0);
-    stubCall.addArgument(op2, regT1);
-    stubCall.call(dst);
+    JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_unsigned);
+    slowPathCall.call();
 }
 
 }
 
-void JIT::emit_compareAndJump(OpcodeID, unsigned op1, unsigned op2, unsigned target, RelationalCondition condition)
+void JIT::emit_compareAndJump(OpcodeID, int op1, int op2, unsigned target, RelationalCondition condition)
 {
     // We generate inline code for the following cases in the fast path:
     // - int immediate to constant int immediate
 {
     // We generate inline code for the following cases in the fast path:
     // - int immediate to constant int immediate
@@ -467,7 +426,7 @@ void JIT::emit_compareAndJump(OpcodeID, unsigned op1, unsigned op2, unsigned tar
     }
 }
 
     }
 }
 
-void JIT::emit_compareAndJumpSlow(unsigned op1, unsigned op2, unsigned target, DoubleCondition condition, int (JIT_STUB *stub)(STUB_ARGS_DECLARATION), bool invert, Vector<SlowCaseEntry>::iterator& iter)
+void JIT::emit_compareAndJumpSlow(int op1, int op2, unsigned target, DoubleCondition condition, size_t (JIT_OPERATION *operation)(ExecState*, EncodedJSValue, EncodedJSValue), bool invert, Vector<SlowCaseEntry>::iterator& iter)
 {
     COMPILE_ASSERT(OPCODE_LENGTH(op_jless) == OPCODE_LENGTH(op_jlesseq), OPCODE_LENGTH_op_jlesseq_equals_op_jless);
     COMPILE_ASSERT(OPCODE_LENGTH(op_jless) == OPCODE_LENGTH(op_jnless), OPCODE_LENGTH_op_jnless_equals_op_jless);
 {
     COMPILE_ASSERT(OPCODE_LENGTH(op_jless) == OPCODE_LENGTH(op_jlesseq), OPCODE_LENGTH_op_jlesseq_equals_op_jless);
     COMPILE_ASSERT(OPCODE_LENGTH(op_jless) == OPCODE_LENGTH(op_jnless), OPCODE_LENGTH_op_jnless_equals_op_jless);
@@ -486,11 +445,11 @@ void JIT::emit_compareAndJumpSlow(unsigned op1, unsigned op2, unsigned target, D
         linkSlowCase(iter);
         linkSlowCase(iter);
         linkSlowCase(iter);
         linkSlowCase(iter);
         linkSlowCase(iter);
         linkSlowCase(iter);
-        JITStubCall stubCall(this, stub);
-        stubCall.addArgument(op1, regT0);
-        stubCall.addArgument(op2, regT1);
-        stubCall.call();
-        emitJumpSlowToHot(branchTest32(invert ? Zero : NonZero, regT0), target);
+
+        emitGetVirtualRegister(op1, argumentGPR0);
+        emitGetVirtualRegister(op2, argumentGPR1);
+        callOperation(operation, argumentGPR0, argumentGPR1);
+        emitJumpSlowToHot(branchTest32(invert ? Zero : NonZero, returnValueGPR), target);
         return;
     }
 
         return;
     }
 
@@ -499,8 +458,8 @@ void JIT::emit_compareAndJumpSlow(unsigned op1, unsigned op2, unsigned target, D
 
         if (supportsFloatingPoint()) {
             Jump fail1 = emitJumpIfNotImmediateNumber(regT0);
 
         if (supportsFloatingPoint()) {
             Jump fail1 = emitJumpIfNotImmediateNumber(regT0);
-            addPtr(tagTypeNumberRegister, regT0);
-            movePtrToDouble(regT0, fpRegT0);
+            add64(tagTypeNumberRegister, regT0);
+            move64ToDouble(regT0, fpRegT0);
 
             int32_t op2imm = getConstantOperand(op2).asInt32();
 
 
             int32_t op2imm = getConstantOperand(op2).asInt32();
 
@@ -514,19 +473,16 @@ void JIT::emit_compareAndJumpSlow(unsigned op1, unsigned op2, unsigned target, D
             fail1.link(this);
         }
 
             fail1.link(this);
         }
 
-        JITStubCall stubCall(this, stub);
-        stubCall.addArgument(regT0);
-        stubCall.addArgument(op2, regT2);
-        stubCall.call();
-        emitJumpSlowToHot(branchTest32(invert ? Zero : NonZero, regT0), target);
-
+        emitGetVirtualRegister(op2, regT1);
+        callOperation(operation, regT0, regT1);
+        emitJumpSlowToHot(branchTest32(invert ? Zero : NonZero, returnValueGPR), target);
     } else if (isOperandConstantImmediateInt(op1)) {
         linkSlowCase(iter);
 
         if (supportsFloatingPoint()) {
             Jump fail1 = emitJumpIfNotImmediateNumber(regT1);
     } else if (isOperandConstantImmediateInt(op1)) {
         linkSlowCase(iter);
 
         if (supportsFloatingPoint()) {
             Jump fail1 = emitJumpIfNotImmediateNumber(regT1);
-            addPtr(tagTypeNumberRegister, regT1);
-            movePtrToDouble(regT1, fpRegT1);
+            add64(tagTypeNumberRegister, regT1);
+            move64ToDouble(regT1, fpRegT1);
 
             int32_t op1imm = getConstantOperand(op1).asInt32();
 
 
             int32_t op1imm = getConstantOperand(op1).asInt32();
 
@@ -540,11 +496,9 @@ void JIT::emit_compareAndJumpSlow(unsigned op1, unsigned op2, unsigned target, D
             fail1.link(this);
         }
 
             fail1.link(this);
         }
 
-        JITStubCall stubCall(this, stub);
-        stubCall.addArgument(op1, regT2);
-        stubCall.addArgument(regT1);
-        stubCall.call();
-        emitJumpSlowToHot(branchTest32(invert ? Zero : NonZero, regT0), target);
+        emitGetVirtualRegister(op1, regT2);
+        callOperation(operation, regT2, regT1);
+        emitJumpSlowToHot(branchTest32(invert ? Zero : NonZero, returnValueGPR), target);
     } else {
         linkSlowCase(iter);
 
     } else {
         linkSlowCase(iter);
 
@@ -552,10 +506,10 @@ void JIT::emit_compareAndJumpSlow(unsigned op1, unsigned op2, unsigned target, D
             Jump fail1 = emitJumpIfNotImmediateNumber(regT0);
             Jump fail2 = emitJumpIfNotImmediateNumber(regT1);
             Jump fail3 = emitJumpIfImmediateInteger(regT1);
             Jump fail1 = emitJumpIfNotImmediateNumber(regT0);
             Jump fail2 = emitJumpIfNotImmediateNumber(regT1);
             Jump fail3 = emitJumpIfImmediateInteger(regT1);
-            addPtr(tagTypeNumberRegister, regT0);
-            addPtr(tagTypeNumberRegister, regT1);
-            movePtrToDouble(regT0, fpRegT0);
-            movePtrToDouble(regT1, fpRegT1);
+            add64(tagTypeNumberRegister, regT0);
+            add64(tagTypeNumberRegister, regT1);
+            move64ToDouble(regT0, fpRegT0);
+            move64ToDouble(regT1, fpRegT1);
 
             emitJumpSlowToHot(branchDouble(condition, fpRegT0, fpRegT1), target);
 
 
             emitJumpSlowToHot(branchDouble(condition, fpRegT0, fpRegT1), target);
 
@@ -567,37 +521,34 @@ void JIT::emit_compareAndJumpSlow(unsigned op1, unsigned op2, unsigned target, D
         }
 
         linkSlowCase(iter);
         }
 
         linkSlowCase(iter);
-        JITStubCall stubCall(this, stub);
-        stubCall.addArgument(regT0);
-        stubCall.addArgument(regT1);
-        stubCall.call();
-        emitJumpSlowToHot(branchTest32(invert ? Zero : NonZero, regT0), target);
+        callOperation(operation, regT0, regT1);
+        emitJumpSlowToHot(branchTest32(invert ? Zero : NonZero, returnValueGPR), target);
     }
 }
 
 void JIT::emit_op_bitand(Instruction* currentInstruction)
 {
     }
 }
 
 void JIT::emit_op_bitand(Instruction* currentInstruction)
 {
-    unsigned result = currentInstruction[1].u.operand;
-    unsigned op1 = currentInstruction[2].u.operand;
-    unsigned op2 = currentInstruction[3].u.operand;
+    int result = currentInstruction[1].u.operand;
+    int op1 = currentInstruction[2].u.operand;
+    int op2 = currentInstruction[3].u.operand;
 
     if (isOperandConstantImmediateInt(op1)) {
         emitGetVirtualRegister(op2, regT0);
         emitJumpSlowCaseIfNotImmediateInteger(regT0);
         int32_t imm = getConstantOperandImmediateInt(op1);
 
     if (isOperandConstantImmediateInt(op1)) {
         emitGetVirtualRegister(op2, regT0);
         emitJumpSlowCaseIfNotImmediateInteger(regT0);
         int32_t imm = getConstantOperandImmediateInt(op1);
-        andPtr(Imm32(imm), regT0);
+        and64(Imm32(imm), regT0);
         if (imm >= 0)
             emitFastArithIntToImmNoCheck(regT0, regT0);
     } else if (isOperandConstantImmediateInt(op2)) {
         emitGetVirtualRegister(op1, regT0);
         emitJumpSlowCaseIfNotImmediateInteger(regT0);
         int32_t imm = getConstantOperandImmediateInt(op2);
         if (imm >= 0)
             emitFastArithIntToImmNoCheck(regT0, regT0);
     } else if (isOperandConstantImmediateInt(op2)) {
         emitGetVirtualRegister(op1, regT0);
         emitJumpSlowCaseIfNotImmediateInteger(regT0);
         int32_t imm = getConstantOperandImmediateInt(op2);
-        andPtr(Imm32(imm), regT0);
+        and64(Imm32(imm), regT0);
         if (imm >= 0)
             emitFastArithIntToImmNoCheck(regT0, regT0);
     } else {
         emitGetVirtualRegisters(op1, regT0, op2, regT1);
         if (imm >= 0)
             emitFastArithIntToImmNoCheck(regT0, regT0);
     } else {
         emitGetVirtualRegisters(op1, regT0, op2, regT1);
-        andPtr(regT1, regT0);
+        and64(regT1, regT0);
         emitJumpSlowCaseIfNotImmediateInteger(regT0);
     }
     emitPutVirtualRegister(result);
         emitJumpSlowCaseIfNotImmediateInteger(regT0);
     }
     emitPutVirtualRegister(result);
@@ -605,86 +556,15 @@ void JIT::emit_op_bitand(Instruction* currentInstruction)
 
 void JIT::emitSlow_op_bitand(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
 
 void JIT::emitSlow_op_bitand(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
-    unsigned result = currentInstruction[1].u.operand;
-    unsigned op1 = currentInstruction[2].u.operand;
-    unsigned op2 = currentInstruction[3].u.operand;
-
     linkSlowCase(iter);
     linkSlowCase(iter);
-    if (isOperandConstantImmediateInt(op1)) {
-        JITStubCall stubCall(this, cti_op_bitand);
-        stubCall.addArgument(op1, regT2);
-        stubCall.addArgument(regT0);
-        stubCall.call(result);
-    } else if (isOperandConstantImmediateInt(op2)) {
-        JITStubCall stubCall(this, cti_op_bitand);
-        stubCall.addArgument(regT0);
-        stubCall.addArgument(op2, regT2);
-        stubCall.call(result);
-    } else {
-        JITStubCall stubCall(this, cti_op_bitand);
-        stubCall.addArgument(op1, regT2);
-        stubCall.addArgument(regT1);
-        stubCall.call(result);
-    }
-}
-
-void JIT::emit_op_post_inc(Instruction* currentInstruction)
-{
-    unsigned result = currentInstruction[1].u.operand;
-    unsigned srcDst = currentInstruction[2].u.operand;
-
-    emitGetVirtualRegister(srcDst, regT0);
-    move(regT0, regT1);
-    emitJumpSlowCaseIfNotImmediateInteger(regT0);
-    addSlowCase(branchAdd32(Overflow, TrustedImm32(1), regT1));
-    emitFastArithIntToImmNoCheck(regT1, regT1);
-    emitPutVirtualRegister(srcDst, regT1);
-    emitPutVirtualRegister(result);
-}
 
 
-void JIT::emitSlow_op_post_inc(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
-{
-    unsigned result = currentInstruction[1].u.operand;
-    unsigned srcDst = currentInstruction[2].u.operand;
-
-    linkSlowCase(iter);
-    linkSlowCase(iter);
-    JITStubCall stubCall(this, cti_op_post_inc);
-    stubCall.addArgument(regT0);
-    stubCall.addArgument(Imm32(srcDst));
-    stubCall.call(result);
+    JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_bitand);
+    slowPathCall.call();
 }
 
 }
 
-void JIT::emit_op_post_dec(Instruction* currentInstruction)
+void JIT::emit_op_inc(Instruction* currentInstruction)
 {
 {
-    unsigned result = currentInstruction[1].u.operand;
-    unsigned srcDst = currentInstruction[2].u.operand;
-
-    emitGetVirtualRegister(srcDst, regT0);
-    move(regT0, regT1);
-    emitJumpSlowCaseIfNotImmediateInteger(regT0);
-    addSlowCase(branchSub32(Overflow, TrustedImm32(1), regT1));
-    emitFastArithIntToImmNoCheck(regT1, regT1);
-    emitPutVirtualRegister(srcDst, regT1);
-    emitPutVirtualRegister(result);
-}
-
-void JIT::emitSlow_op_post_dec(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
-{
-    unsigned result = currentInstruction[1].u.operand;
-    unsigned srcDst = currentInstruction[2].u.operand;
-
-    linkSlowCase(iter);
-    linkSlowCase(iter);
-    JITStubCall stubCall(this, cti_op_post_dec);
-    stubCall.addArgument(regT0);
-    stubCall.addArgument(Imm32(srcDst));
-    stubCall.call(result);
-}
-
-void JIT::emit_op_pre_inc(Instruction* currentInstruction)
-{
-    unsigned srcDst = currentInstruction[1].u.operand;
+    int srcDst = currentInstruction[1].u.operand;
 
     emitGetVirtualRegister(srcDst, regT0);
     emitJumpSlowCaseIfNotImmediateInteger(regT0);
 
     emitGetVirtualRegister(srcDst, regT0);
     emitJumpSlowCaseIfNotImmediateInteger(regT0);
@@ -693,22 +573,17 @@ void JIT::emit_op_pre_inc(Instruction* currentInstruction)
     emitPutVirtualRegister(srcDst);
 }
 
     emitPutVirtualRegister(srcDst);
 }
 
-void JIT::emitSlow_op_pre_inc(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
+void JIT::emitSlow_op_inc(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
 {
-    unsigned srcDst = currentInstruction[1].u.operand;
-
-    Jump notImm = getSlowCase(iter);
     linkSlowCase(iter);
     linkSlowCase(iter);
-    emitGetVirtualRegister(srcDst, regT0);
-    notImm.link(this);
-    JITStubCall stubCall(this, cti_op_pre_inc);
-    stubCall.addArgument(regT0);
-    stubCall.call(srcDst);
+    linkSlowCase(iter);
+    JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_inc);
+    slowPathCall.call();
 }
 
 }
 
-void JIT::emit_op_pre_dec(Instruction* currentInstruction)
+void JIT::emit_op_dec(Instruction* currentInstruction)
 {
 {
-    unsigned srcDst = currentInstruction[1].u.operand;
+    int srcDst = currentInstruction[1].u.operand;
 
     emitGetVirtualRegister(srcDst, regT0);
     emitJumpSlowCaseIfNotImmediateInteger(regT0);
 
     emitGetVirtualRegister(srcDst, regT0);
     emitJumpSlowCaseIfNotImmediateInteger(regT0);
@@ -717,17 +592,12 @@ void JIT::emit_op_pre_dec(Instruction* currentInstruction)
     emitPutVirtualRegister(srcDst);
 }
 
     emitPutVirtualRegister(srcDst);
 }
 
-void JIT::emitSlow_op_pre_dec(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
+void JIT::emitSlow_op_dec(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
 {
-    unsigned srcDst = currentInstruction[1].u.operand;
-
-    Jump notImm = getSlowCase(iter);
     linkSlowCase(iter);
     linkSlowCase(iter);
-    emitGetVirtualRegister(srcDst, regT0);
-    notImm.link(this);
-    JITStubCall stubCall(this, cti_op_pre_dec);
-    stubCall.addArgument(regT0);
-    stubCall.call(srcDst);
+    linkSlowCase(iter);
+    JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_dec);
+    slowPathCall.call();
 }
 
 /* ------------------------------ BEGIN: OP_MOD ------------------------------ */
 }
 
 /* ------------------------------ BEGIN: OP_MOD ------------------------------ */
@@ -736,9 +606,9 @@ void JIT::emitSlow_op_pre_dec(Instruction* currentInstruction, Vector<SlowCaseEn
 
 void JIT::emit_op_mod(Instruction* currentInstruction)
 {
 
 void JIT::emit_op_mod(Instruction* currentInstruction)
 {
-    unsigned result = currentInstruction[1].u.operand;
-    unsigned op1 = currentInstruction[2].u.operand;
-    unsigned op2 = currentInstruction[3].u.operand;
+    int result = 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);
 
     // Make sure registers are correct for x86 IDIV instructions.
     ASSERT(regT0 == X86Registers::eax);
@@ -765,36 +635,26 @@ void JIT::emit_op_mod(Instruction* currentInstruction)
 
 void JIT::emitSlow_op_mod(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
 
 void JIT::emitSlow_op_mod(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
-    unsigned result = currentInstruction[1].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(regT3);
-    stubCall.addArgument(regT2);
-    stubCall.call(result);
+    JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_mod);
+    slowPathCall.call();
 }
 
 #else // CPU(X86) || CPU(X86_64)
 
 void JIT::emit_op_mod(Instruction* currentInstruction)
 {
 }
 
 #else // CPU(X86) || CPU(X86_64)
 
 void JIT::emit_op_mod(Instruction* currentInstruction)
 {
-    unsigned result = currentInstruction[1].u.operand;
-    unsigned op1 = currentInstruction[2].u.operand;
-    unsigned op2 = currentInstruction[3].u.operand;
-
-    JITStubCall stubCall(this, cti_op_mod);
-    stubCall.addArgument(op1, regT2);
-    stubCall.addArgument(op2, regT2);
-    stubCall.call(result);
+    JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_mod);
+    slowPathCall.call();
 }
 
 }
 
-void JIT::emitSlow_op_mod(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
+void JIT::emitSlow_op_mod(Instruction*, Vector<SlowCaseEntry>::iterator&)
 {
 {
-    ASSERT_NOT_REACHED();
+    UNREACHABLE_FOR_PLATFORM();
 }
 
 #endif // CPU(X86) || CPU(X86_64)
 }
 
 #endif // CPU(X86) || CPU(X86_64)
@@ -803,22 +663,19 @@ void JIT::emitSlow_op_mod(Instruction* currentInstruction, Vector<SlowCaseEntry>
 
 /* ------------------------------ BEGIN: USE(JSVALUE64) (OP_ADD, OP_SUB, OP_MUL) ------------------------------ */
 
 
 /* ------------------------------ BEGIN: USE(JSVALUE64) (OP_ADD, OP_SUB, OP_MUL) ------------------------------ */
 
-void JIT::compileBinaryArithOp(OpcodeID opcodeID, unsigned, unsigned op1, unsigned op2, OperandTypes)
+void JIT::compileBinaryArithOp(OpcodeID opcodeID, int, int op1, int op2, OperandTypes)
 {
     emitGetVirtualRegisters(op1, regT0, op2, regT1);
     emitJumpSlowCaseIfNotImmediateInteger(regT0);
     emitJumpSlowCaseIfNotImmediateInteger(regT1);
 {
     emitGetVirtualRegisters(op1, regT0, op2, regT1);
     emitJumpSlowCaseIfNotImmediateInteger(regT0);
     emitJumpSlowCaseIfNotImmediateInteger(regT1);
-#if ENABLE(VALUE_PROFILER)
     RareCaseProfile* profile = m_codeBlock->addSpecialFastCaseProfile(m_bytecodeOffset);
     RareCaseProfile* profile = m_codeBlock->addSpecialFastCaseProfile(m_bytecodeOffset);
-#endif
     if (opcodeID == op_add)
         addSlowCase(branchAdd32(Overflow, regT1, regT0));
     else if (opcodeID == op_sub)
         addSlowCase(branchSub32(Overflow, regT1, regT0));
     else {
         ASSERT(opcodeID == op_mul);
     if (opcodeID == op_add)
         addSlowCase(branchAdd32(Overflow, regT1, regT0));
     else if (opcodeID == op_sub)
         addSlowCase(branchSub32(Overflow, regT1, regT0));
     else {
         ASSERT(opcodeID == op_mul);
-#if ENABLE(VALUE_PROFILER)
-        if (m_canBeOptimized) {
+        if (shouldEmitProfiling()) {
             // We want to be able to measure if this is taking the slow case just
             // because of negative zero. If this produces positive zero, then we
             // don't want the slow case to be taken because that will throw off
             // We want to be able to measure if this is taking the slow case just
             // because of negative zero. If this produces positive zero, then we
             // don't want the slow case to be taken because that will throw off
@@ -841,15 +698,11 @@ void JIT::compileBinaryArithOp(OpcodeID opcodeID, unsigned, unsigned op1, unsign
             addSlowCase(branchMul32(Overflow, regT1, regT0));
             addSlowCase(branchTest32(Zero, regT0));
         }
             addSlowCase(branchMul32(Overflow, regT1, regT0));
             addSlowCase(branchTest32(Zero, regT0));
         }
-#else
-        addSlowCase(branchMul32(Overflow, regT1, regT0));
-        addSlowCase(branchTest32(Zero, regT0));
-#endif
     }
     emitFastArithIntToImmNoCheck(regT0, regT0);
 }
 
     }
     emitFastArithIntToImmNoCheck(regT0, regT0);
 }
 
-void JIT::compileBinaryArithOpSlowCase(OpcodeID opcodeID, Vector<SlowCaseEntry>::iterator& iter, unsigned result, unsigned op1, unsigned op2, OperandTypes types, bool op1HasImmediateIntFastCase, bool op2HasImmediateIntFastCase)
+void JIT::compileBinaryArithOpSlowCase(Instruction* currentInstruction, OpcodeID opcodeID, Vector<SlowCaseEntry>::iterator& iter, int result, int op1, int op2, OperandTypes types, bool op1HasImmediateIntFastCase, bool op2HasImmediateIntFastCase)
 {
     // We assume that subtracting TagTypeNumber is equivalent to adding DoubleEncodeOffset.
     COMPILE_ASSERT(((TagTypeNumber + DoubleEncodeOffset) == 0), TagTypeNumber_PLUS_DoubleEncodeOffset_EQUALS_0);
 {
     // We assume that subtracting TagTypeNumber is equivalent to adding DoubleEncodeOffset.
     COMPILE_ASSERT(((TagTypeNumber + DoubleEncodeOffset) == 0), TagTypeNumber_PLUS_DoubleEncodeOffset_EQUALS_0);
@@ -868,17 +721,11 @@ void JIT::compileBinaryArithOpSlowCase(OpcodeID opcodeID, Vector<SlowCaseEntry>:
     linkSlowCase(iter); // Integer overflow case - we could handle this in JIT code, but this is likely rare.
     if (opcodeID == op_mul && !op1HasImmediateIntFastCase && !op2HasImmediateIntFastCase) // op_mul has an extra slow case to handle 0 * negative number.
         linkSlowCase(iter);
     linkSlowCase(iter); // Integer overflow case - we could handle this in JIT code, but this is likely rare.
     if (opcodeID == op_mul && !op1HasImmediateIntFastCase && !op2HasImmediateIntFastCase) // op_mul has an extra slow case to handle 0 * negative number.
         linkSlowCase(iter);
-    emitGetVirtualRegister(op1, regT0);
 
     Label stubFunctionCall(this);
 
     Label stubFunctionCall(this);
-    JITStubCall stubCall(this, opcodeID == op_add ? cti_op_add : opcodeID == op_sub ? cti_op_sub : cti_op_mul);
-    if (op1HasImmediateIntFastCase || op2HasImmediateIntFastCase) {
-        emitGetVirtualRegister(op1, regT0);
-        emitGetVirtualRegister(op2, regT1);
-    }
-    stubCall.addArgument(regT0);
-    stubCall.addArgument(regT1);
-    stubCall.call(result);
+
+    JITSlowPathCall slowPathCall(this, currentInstruction, opcodeID == op_add ? slow_path_add : opcodeID == op_sub ? slow_path_sub : slow_path_mul);
+    slowPathCall.call();
     Jump end = jump();
 
     if (op1HasImmediateIntFastCase) {
     Jump end = jump();
 
     if (op1HasImmediateIntFastCase) {
@@ -887,16 +734,16 @@ void JIT::compileBinaryArithOpSlowCase(OpcodeID opcodeID, Vector<SlowCaseEntry>:
             emitJumpIfNotImmediateNumber(regT0).linkTo(stubFunctionCall, this);
         emitGetVirtualRegister(op1, regT1);
         convertInt32ToDouble(regT1, fpRegT1);
             emitJumpIfNotImmediateNumber(regT0).linkTo(stubFunctionCall, this);
         emitGetVirtualRegister(op1, regT1);
         convertInt32ToDouble(regT1, fpRegT1);
-        addPtr(tagTypeNumberRegister, regT0);
-        movePtrToDouble(regT0, fpRegT2);
+        add64(tagTypeNumberRegister, regT0);
+        move64ToDouble(regT0, fpRegT2);
     } else if (op2HasImmediateIntFastCase) {
         notImm1.link(this);
         if (!types.first().definitelyIsNumber())
             emitJumpIfNotImmediateNumber(regT0).linkTo(stubFunctionCall, this);
         emitGetVirtualRegister(op2, regT1);
         convertInt32ToDouble(regT1, fpRegT1);
     } else if (op2HasImmediateIntFastCase) {
         notImm1.link(this);
         if (!types.first().definitelyIsNumber())
             emitJumpIfNotImmediateNumber(regT0).linkTo(stubFunctionCall, this);
         emitGetVirtualRegister(op2, regT1);
         convertInt32ToDouble(regT1, fpRegT1);
-        addPtr(tagTypeNumberRegister, regT0);
-        movePtrToDouble(regT0, fpRegT2);
+        add64(tagTypeNumberRegister, regT0);
+        move64ToDouble(regT0, fpRegT2);
     } else {
         // if we get here, eax is not an int32, edx not yet checked.
         notImm1.link(this);
     } else {
         // if we get here, eax is not an int32, edx not yet checked.
         notImm1.link(this);
@@ -904,8 +751,8 @@ void JIT::compileBinaryArithOpSlowCase(OpcodeID opcodeID, Vector<SlowCaseEntry>:
             emitJumpIfNotImmediateNumber(regT0).linkTo(stubFunctionCall, this);
         if (!types.second().definitelyIsNumber())
             emitJumpIfNotImmediateNumber(regT1).linkTo(stubFunctionCall, this);
             emitJumpIfNotImmediateNumber(regT0).linkTo(stubFunctionCall, this);
         if (!types.second().definitelyIsNumber())
             emitJumpIfNotImmediateNumber(regT1).linkTo(stubFunctionCall, this);
-        addPtr(tagTypeNumberRegister, regT0);
-        movePtrToDouble(regT0, fpRegT1);
+        add64(tagTypeNumberRegister, regT0);
+        move64ToDouble(regT0, fpRegT1);
         Jump op2isDouble = emitJumpIfNotImmediateInteger(regT1);
         convertInt32ToDouble(regT1, fpRegT2);
         Jump op2wasInteger = jump();
         Jump op2isDouble = emitJumpIfNotImmediateInteger(regT1);
         convertInt32ToDouble(regT1, fpRegT2);
         Jump op2wasInteger = jump();
@@ -916,8 +763,8 @@ void JIT::compileBinaryArithOpSlowCase(OpcodeID opcodeID, Vector<SlowCaseEntry>:
             emitJumpIfNotImmediateNumber(regT1).linkTo(stubFunctionCall, this);
         convertInt32ToDouble(regT0, fpRegT1);
         op2isDouble.link(this);
             emitJumpIfNotImmediateNumber(regT1).linkTo(stubFunctionCall, this);
         convertInt32ToDouble(regT0, fpRegT1);
         op2isDouble.link(this);
-        addPtr(tagTypeNumberRegister, regT1);
-        movePtrToDouble(regT1, fpRegT2);
+        add64(tagTypeNumberRegister, regT1);
+        move64ToDouble(regT1, fpRegT2);
         op2wasInteger.link(this);
     }
 
         op2wasInteger.link(this);
     }
 
@@ -931,8 +778,8 @@ void JIT::compileBinaryArithOpSlowCase(OpcodeID opcodeID, Vector<SlowCaseEntry>:
         ASSERT(opcodeID == op_div);
         divDouble(fpRegT2, fpRegT1);
     }
         ASSERT(opcodeID == op_div);
         divDouble(fpRegT2, fpRegT1);
     }
-    moveDoubleToPtr(fpRegT1, regT0);
-    subPtr(tagTypeNumberRegister, regT0);
+    moveDoubleTo64(fpRegT1, regT0);
+    sub64(tagTypeNumberRegister, regT0);
     emitPutVirtualRegister(result, regT0);
 
     end.link(this);
     emitPutVirtualRegister(result, regT0);
 
     end.link(this);
@@ -940,17 +787,15 @@ void JIT::compileBinaryArithOpSlowCase(OpcodeID opcodeID, Vector<SlowCaseEntry>:
 
 void JIT::emit_op_add(Instruction* currentInstruction)
 {
 
 void JIT::emit_op_add(Instruction* currentInstruction)
 {
-    unsigned result = currentInstruction[1].u.operand;
-    unsigned op1 = currentInstruction[2].u.operand;
-    unsigned op2 = currentInstruction[3].u.operand;
+    int result = 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, regT2);
-        stubCall.addArgument(op2, regT2);
-        stubCall.call(result);
+        JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_add);
+        slowPathCall.call();
         return;
     }
 
         return;
     }
 
@@ -972,9 +817,9 @@ void JIT::emit_op_add(Instruction* currentInstruction)
 
 void JIT::emitSlow_op_add(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
 
 void JIT::emitSlow_op_add(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
-    unsigned result = currentInstruction[1].u.operand;
-    unsigned op1 = currentInstruction[2].u.operand;
-    unsigned op2 = currentInstruction[3].u.operand;
+    int result = 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()) {
     OperandTypes types = OperandTypes::fromInt(currentInstruction[4].u.operand);
 
     if (!types.first().mightBeNumber() || !types.second().mightBeNumber()) {
@@ -984,32 +829,28 @@ void JIT::emitSlow_op_add(Instruction* currentInstruction, Vector<SlowCaseEntry>
 
     bool op1HasImmediateIntFastCase = isOperandConstantImmediateInt(op1);
     bool op2HasImmediateIntFastCase = !op1HasImmediateIntFastCase && isOperandConstantImmediateInt(op2);
 
     bool op1HasImmediateIntFastCase = isOperandConstantImmediateInt(op1);
     bool op2HasImmediateIntFastCase = !op1HasImmediateIntFastCase && isOperandConstantImmediateInt(op2);
-    compileBinaryArithOpSlowCase(op_add, iter, result, op1, op2, types, op1HasImmediateIntFastCase, op2HasImmediateIntFastCase);
+    compileBinaryArithOpSlowCase(currentInstruction, op_add, iter, result, op1, op2, types, op1HasImmediateIntFastCase, op2HasImmediateIntFastCase);
 }
 
 void JIT::emit_op_mul(Instruction* currentInstruction)
 {
 }
 
 void JIT::emit_op_mul(Instruction* currentInstruction)
 {
-    unsigned result = currentInstruction[1].u.operand;
-    unsigned op1 = currentInstruction[2].u.operand;
-    unsigned op2 = currentInstruction[3].u.operand;
+    int result = currentInstruction[1].u.operand;
+    int op1 = currentInstruction[2].u.operand;
+    int op2 = currentInstruction[3].u.operand;
     OperandTypes types = OperandTypes::fromInt(currentInstruction[4].u.operand);
 
     // For now, only plant a fast int case if the constant operand is greater than zero.
     int32_t value;
     if (isOperandConstantImmediateInt(op1) && ((value = getConstantOperandImmediateInt(op1)) > 0)) {
     OperandTypes types = OperandTypes::fromInt(currentInstruction[4].u.operand);
 
     // For now, only plant a fast int case if the constant operand is greater than zero.
     int32_t value;
     if (isOperandConstantImmediateInt(op1) && ((value = getConstantOperandImmediateInt(op1)) > 0)) {
-#if ENABLE(VALUE_PROFILER)
         // Add a special fast case profile because the DFG JIT will expect one.
         m_codeBlock->addSpecialFastCaseProfile(m_bytecodeOffset);
         // Add a special fast case profile because the DFG JIT will expect one.
         m_codeBlock->addSpecialFastCaseProfile(m_bytecodeOffset);
-#endif
         emitGetVirtualRegister(op2, regT0);
         emitJumpSlowCaseIfNotImmediateInteger(regT0);
         addSlowCase(branchMul32(Overflow, Imm32(value), regT0, regT1));
         emitFastArithReTagImmediate(regT1, regT0);
     } else if (isOperandConstantImmediateInt(op2) && ((value = getConstantOperandImmediateInt(op2)) > 0)) {
         emitGetVirtualRegister(op2, regT0);
         emitJumpSlowCaseIfNotImmediateInteger(regT0);
         addSlowCase(branchMul32(Overflow, Imm32(value), regT0, regT1));
         emitFastArithReTagImmediate(regT1, regT0);
     } else if (isOperandConstantImmediateInt(op2) && ((value = getConstantOperandImmediateInt(op2)) > 0)) {
-#if ENABLE(VALUE_PROFILER)
         // Add a special fast case profile because the DFG JIT will expect one.
         m_codeBlock->addSpecialFastCaseProfile(m_bytecodeOffset);
         // Add a special fast case profile because the DFG JIT will expect one.
         m_codeBlock->addSpecialFastCaseProfile(m_bytecodeOffset);
-#endif
         emitGetVirtualRegister(op1, regT0);
         emitJumpSlowCaseIfNotImmediateInteger(regT0);
         addSlowCase(branchMul32(Overflow, Imm32(value), regT0, regT1));
         emitGetVirtualRegister(op1, regT0);
         emitJumpSlowCaseIfNotImmediateInteger(regT0);
         addSlowCase(branchMul32(Overflow, Imm32(value), regT0, regT1));
@@ -1022,27 +863,27 @@ 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 result = currentInstruction[1].u.operand;
-    unsigned op1 = currentInstruction[2].u.operand;
-    unsigned op2 = currentInstruction[3].u.operand;
+    int result = currentInstruction[1].u.operand;
+    int op1 = currentInstruction[2].u.operand;
+    int op2 = currentInstruction[3].u.operand;
     OperandTypes types = OperandTypes::fromInt(currentInstruction[4].u.operand);
 
     bool op1HasImmediateIntFastCase = isOperandConstantImmediateInt(op1) && getConstantOperandImmediateInt(op1) > 0;
     bool op2HasImmediateIntFastCase = !op1HasImmediateIntFastCase && isOperandConstantImmediateInt(op2) && getConstantOperandImmediateInt(op2) > 0;
     OperandTypes types = OperandTypes::fromInt(currentInstruction[4].u.operand);
 
     bool op1HasImmediateIntFastCase = isOperandConstantImmediateInt(op1) && getConstantOperandImmediateInt(op1) > 0;
     bool op2HasImmediateIntFastCase = !op1HasImmediateIntFastCase && isOperandConstantImmediateInt(op2) && getConstantOperandImmediateInt(op2) > 0;
-    compileBinaryArithOpSlowCase(op_mul, iter, result, op1, op2, types, op1HasImmediateIntFastCase, op2HasImmediateIntFastCase);
+    compileBinaryArithOpSlowCase(currentInstruction, op_mul, iter, result, op1, op2, types, op1HasImmediateIntFastCase, op2HasImmediateIntFastCase);
 }
 
 void JIT::emit_op_div(Instruction* currentInstruction)
 {
 }
 
 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);
 
     if (isOperandConstantImmediateDouble(op1)) {
         emitGetVirtualRegister(op1, regT0);
     OperandTypes types = OperandTypes::fromInt(currentInstruction[4].u.operand);
 
     if (isOperandConstantImmediateDouble(op1)) {
         emitGetVirtualRegister(op1, regT0);
-        addPtr(tagTypeNumberRegister, regT0);
-        movePtrToDouble(regT0, fpRegT0);
+        add64(tagTypeNumberRegister, regT0);
+        move64ToDouble(regT0, fpRegT0);
     } else if (isOperandConstantImmediateInt(op1)) {
         emitLoadInt32ToDouble(op1, fpRegT0);
     } else {
     } else if (isOperandConstantImmediateInt(op1)) {
         emitLoadInt32ToDouble(op1, fpRegT0);
     } else {
@@ -1053,15 +894,15 @@ void JIT::emit_op_div(Instruction* currentInstruction)
         convertInt32ToDouble(regT0, fpRegT0);
         Jump skipDoubleLoad = jump();
         notInt.link(this);
         convertInt32ToDouble(regT0, fpRegT0);
         Jump skipDoubleLoad = jump();
         notInt.link(this);
-        addPtr(tagTypeNumberRegister, regT0);
-        movePtrToDouble(regT0, fpRegT0);
+        add64(tagTypeNumberRegister, regT0);
+        move64ToDouble(regT0, fpRegT0);
         skipDoubleLoad.link(this);
     }
 
     if (isOperandConstantImmediateDouble(op2)) {
         emitGetVirtualRegister(op2, regT1);
         skipDoubleLoad.link(this);
     }
 
     if (isOperandConstantImmediateDouble(op2)) {
         emitGetVirtualRegister(op2, regT1);
-        addPtr(tagTypeNumberRegister, regT1);
-        movePtrToDouble(regT1, fpRegT1);
+        add64(tagTypeNumberRegister, regT1);
+        move64ToDouble(regT1, fpRegT1);
     } else if (isOperandConstantImmediateInt(op2)) {
         emitLoadInt32ToDouble(op2, fpRegT1);
     } else {
     } else if (isOperandConstantImmediateInt(op2)) {
         emitLoadInt32ToDouble(op2, fpRegT1);
     } else {
@@ -1072,13 +913,12 @@ void JIT::emit_op_div(Instruction* currentInstruction)
         convertInt32ToDouble(regT1, fpRegT1);
         Jump skipDoubleLoad = jump();
         notInt.link(this);
         convertInt32ToDouble(regT1, fpRegT1);
         Jump skipDoubleLoad = jump();
         notInt.link(this);
-        addPtr(tagTypeNumberRegister, regT1);
-        movePtrToDouble(regT1, fpRegT1);
+        add64(tagTypeNumberRegister, regT1);
+        move64ToDouble(regT1, fpRegT1);
         skipDoubleLoad.link(this);
     }
     divDouble(fpRegT1, fpRegT0);
     
         skipDoubleLoad.link(this);
     }
     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
@@ -1090,38 +930,33 @@ void JIT::emit_op_div(Instruction* currentInstruction)
     // access). So if we are DFG compiling anything in the program, we want this code to
     // ensure that it produces integers whenever possible.
     
     // access). So if we are DFG compiling anything in the program, we want this code to
     // ensure that it produces integers whenever possible.
     
-    // FIXME: This will fail to convert to integer if the result is zero. We should
-    // distinguish between positive zero and negative zero here.
-    
     JumpList notInteger;
     branchConvertDoubleToInt32(fpRegT0, regT0, notInteger, fpRegT1);
     // If we've got an integer, we might as well make that the result of the division.
     emitFastArithReTagImmediate(regT0, regT0);
     Jump isInteger = jump();
     notInteger.link(this);
     JumpList notInteger;
     branchConvertDoubleToInt32(fpRegT0, regT0, notInteger, fpRegT1);
     // If we've got an integer, we might as well make that the result of the division.
     emitFastArithReTagImmediate(regT0, regT0);
     Jump isInteger = jump();
     notInteger.link(this);
+    moveDoubleTo64(fpRegT0, regT0);
+    Jump doubleZero = branchTest64(Zero, regT0);
     add32(TrustedImm32(1), AbsoluteAddress(&m_codeBlock->addSpecialFastCaseProfile(m_bytecodeOffset)->m_counter));
     add32(TrustedImm32(1), AbsoluteAddress(&m_codeBlock->addSpecialFastCaseProfile(m_bytecodeOffset)->m_counter));
-    moveDoubleToPtr(fpRegT0, regT0);
-    subPtr(tagTypeNumberRegister, regT0);
+    sub64(tagTypeNumberRegister, regT0);
+    Jump trueDouble = jump();
+    doubleZero.link(this);
+    move(tagTypeNumberRegister, regT0);
+    trueDouble.link(this);
     isInteger.link(this);
     isInteger.link(this);
-#else
-    // Double result.
-    moveDoubleToPtr(fpRegT0, regT0);
-    subPtr(tagTypeNumberRegister, regT0);
-#endif
 
     emitPutVirtualRegister(dst, regT0);
 }
 
 void JIT::emitSlow_op_div(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
 
     emitPutVirtualRegister(dst, regT0);
 }
 
 void JIT::emitSlow_op_div(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
-    unsigned result = 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().definitelyIsNumber() && types.second().definitelyIsNumber()) {
     OperandTypes types = OperandTypes::fromInt(currentInstruction[4].u.operand);
     if (types.first().definitelyIsNumber() && types.second().definitelyIsNumber()) {
-#ifndef NDEBUG
-        breakpoint();
-#endif
+        if (!ASSERT_DISABLED)
+            abortWithReason(JITDivOperandsAreNotNumbers);
         return;
     }
     if (!isOperandConstantImmediateDouble(op1) && !isOperandConstantImmediateInt(op1)) {
         return;
     }
     if (!isOperandConstantImmediateDouble(op1) && !isOperandConstantImmediateInt(op1)) {
@@ -1133,17 +968,15 @@ void JIT::emitSlow_op_div(Instruction* currentInstruction, Vector<SlowCaseEntry>
             linkSlowCase(iter);
     }
     // There is an extra slow case for (op1 * -N) or (-N * op2), to check for 0 since this should produce a result of -0.
             linkSlowCase(iter);
     }
     // There is an extra slow case for (op1 * -N) or (-N * op2), to check for 0 since this should produce a result of -0.
-    JITStubCall stubCall(this, cti_op_div);
-    stubCall.addArgument(op1, regT2);
-    stubCall.addArgument(op2, regT2);
-    stubCall.call(result);
+    JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_div);
+    slowPathCall.call();
 }
 
 void JIT::emit_op_sub(Instruction* currentInstruction)
 {
 }
 
 void JIT::emit_op_sub(Instruction* currentInstruction)
 {
-    unsigned result = currentInstruction[1].u.operand;
-    unsigned op1 = currentInstruction[2].u.operand;
-    unsigned op2 = currentInstruction[3].u.operand;
+    int result = currentInstruction[1].u.operand;
+    int op1 = currentInstruction[2].u.operand;
+    int op2 = currentInstruction[3].u.operand;
     OperandTypes types = OperandTypes::fromInt(currentInstruction[4].u.operand);
 
     compileBinaryArithOp(op_sub, result, op1, op2, types);
     OperandTypes types = OperandTypes::fromInt(currentInstruction[4].u.operand);
 
     compileBinaryArithOp(op_sub, result, op1, op2, types);
@@ -1152,12 +985,12 @@ void JIT::emit_op_sub(Instruction* currentInstruction)
 
 void JIT::emitSlow_op_sub(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
 
 void JIT::emitSlow_op_sub(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
 {
-    unsigned result = currentInstruction[1].u.operand;
-    unsigned op1 = currentInstruction[2].u.operand;
-    unsigned op2 = currentInstruction[3].u.operand;
+    int result = 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);
 
-    compileBinaryArithOpSlowCase(op_sub, iter, result, op1, op2, types, false, false);
+    compileBinaryArithOpSlowCase(currentInstruction, op_sub, iter, result, op1, op2, types, false, false);
 }
 
 /* ------------------------------ END: OP_ADD, OP_SUB, OP_MUL ------------------------------ */
 }
 
 /* ------------------------------ END: OP_ADD, OP_SUB, OP_MUL ------------------------------ */
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