2010-10-19  Oliver Hunt  <oliver@apple.com>

        Reviewed by Geoffrey Garen.

        Remove support for JSVALUE32 from JSC
        https://bugs.webkit.org/show_bug.cgi?id=47948

        Remove all the code for supporting JSVALUE32 from JSC.

        * jit/JIT.cpp:
        (JSC::JIT::privateCompileMainPass):
        (JSC::JIT::privateCompileSlowCases):
        * jit/JIT.h:
        * jit/JITArithmetic.cpp:
        (JSC::JIT::emit_op_lshift):
        (JSC::JIT::emitSlow_op_lshift):
        (JSC::JIT::emit_op_rshift):
        (JSC::JIT::emitSlow_op_rshift):
        (JSC::JIT::emit_op_urshift):
        (JSC::JIT::emitSlow_op_urshift):
        (JSC::JIT::emit_op_jnless):
        (JSC::JIT::emitSlow_op_jnless):
        (JSC::JIT::emit_op_jless):
        (JSC::JIT::emitSlow_op_jless):
        (JSC::JIT::emit_op_jlesseq):
        (JSC::JIT::emitSlow_op_jlesseq):
        (JSC::JIT::emit_op_bitand):
        (JSC::JIT::emit_op_post_inc):
        (JSC::JIT::emit_op_post_dec):
        (JSC::JIT::emit_op_pre_inc):
        (JSC::JIT::emit_op_pre_dec):
        (JSC::JIT::emit_op_mod):
        (JSC::JIT::emitSlow_op_mod):
        * jit/JITCall.cpp:
        * jit/JITInlineMethods.h:
        (JSC::JIT::emitGetFromCallFrameHeaderPtr):
        (JSC::JIT::emitGetFromCallFrameHeader32):
        * jit/JITOpcodes.cpp:
        (JSC::JIT::emit_op_loop_if_lesseq):
        (JSC::JIT::emit_op_bitnot):
        (JSC::JIT::emit_op_next_pname):
        * jit/JITPropertyAccess.cpp:
        (JSC::JIT::emit_op_get_by_val):
        (JSC::JIT::emit_op_put_by_val):
        * jit/JITStubs.h:
        * jit/JSInterfaceJIT.h:
        * jit/SpecializedThunkJIT.h:
        (JSC::SpecializedThunkJIT::returnDouble):
        (JSC::SpecializedThunkJIT::tagReturnAsInt32):
        * jit/ThunkGenerators.cpp:
        (JSC::sqrtThunkGenerator):
        (JSC::powThunkGenerator):
        * runtime/Collector.cpp:
        (JSC::isPossibleCell):
        (JSC::typeName):
        * runtime/JSCell.h:
        * runtime/JSGlobalData.cpp:
        (JSC::JSGlobalData::JSGlobalData):
        * runtime/JSGlobalData.h:
        * runtime/JSGlobalObject.h:
        (JSC::Structure::prototypeForLookup):
        * runtime/JSImmediate.h:
        (JSC::reinterpretIntptrToDouble):
        (JSC::JSImmediate::isIntegerNumber):
        (JSC::JSImmediate::isDouble):
        (JSC::JSImmediate::areBothImmediateIntegerNumbers):
        (JSC::JSImmediate::makeDouble):
        (JSC::JSImmediate::doubleValue):
        (JSC::JSImmediate::toBoolean):
        (JSC::JSImmediate::fromNumberOutsideIntegerRange):
        (JSC::JSImmediate::from):
        (JSC::JSImmediate::toDouble):
        (JSC::JSFastMath::rightShiftImmediateNumbers):
        * runtime/JSNumberCell.cpp:
        * runtime/JSNumberCell.h:
        * runtime/JSObject.h:
        (JSC::JSObject::JSObject):
        * runtime/JSValue.h:
        * runtime/NumberObject.h:
        * wtf/Platform.h:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@70111 268f45cc-cd09-0410-ab3c-d52691b4dbfc
diff --git a/JavaScriptCore/jit/JIT.cpp b/JavaScriptCore/jit/JIT.cpp
index ec9375f..0eabdf5 100644
--- a/JavaScriptCore/jit/JIT.cpp
+++ b/JavaScriptCore/jit/JIT.cpp
@@ -186,7 +186,7 @@
             sampleInstruction(currentInstruction);
 #endif
 
-#if !USE(JSVALUE32_64)
+#if USE(JSVALUE64)
         if (m_labels[m_bytecodeOffset].isUsed())
             killLastResultRegister();
 #endif
@@ -195,9 +195,6 @@
 
         switch (m_interpreter->getOpcodeID(currentInstruction->u.opcode)) {
         DEFINE_BINARY_OP(op_del_by_val)
-#if USE(JSVALUE32)
-        DEFINE_BINARY_OP(op_div)
-#endif
         DEFINE_BINARY_OP(op_in)
         DEFINE_BINARY_OP(op_less)
         DEFINE_BINARY_OP(op_lesseq)
@@ -207,7 +204,7 @@
         DEFINE_UNARY_OP(op_is_object)
         DEFINE_UNARY_OP(op_is_string)
         DEFINE_UNARY_OP(op_is_undefined)
-#if !USE(JSVALUE32_64)
+#if USE(JSVALUE64)
         DEFINE_UNARY_OP(op_negate)
 #endif
         DEFINE_UNARY_OP(op_typeof)
@@ -230,9 +227,7 @@
         DEFINE_OP(op_create_arguments)
         DEFINE_OP(op_debug)
         DEFINE_OP(op_del_by_id)
-#if !USE(JSVALUE32)
         DEFINE_OP(op_div)
-#endif
         DEFINE_OP(op_end)
         DEFINE_OP(op_enter)
         DEFINE_OP(op_create_activation)
@@ -377,7 +372,7 @@
     m_callLinkInfoIndex = 0;
 
     for (Vector<SlowCaseEntry>::iterator iter = m_slowCases.begin(); iter != m_slowCases.end();) {
-#if !USE(JSVALUE32_64)
+#if USE(JSVALUE64)
         killLastResultRegister();
 #endif
 
@@ -399,9 +394,7 @@
         DEFINE_SLOWCASE_OP(op_construct)
         DEFINE_SLOWCASE_OP(op_convert_this)
         DEFINE_SLOWCASE_OP(op_convert_this_strict)
-#if !USE(JSVALUE32)
         DEFINE_SLOWCASE_OP(op_div)
-#endif
         DEFINE_SLOWCASE_OP(op_eq)
         DEFINE_SLOWCASE_OP(op_get_by_id)
         DEFINE_SLOWCASE_OP(op_get_arguments_length)
@@ -599,7 +592,7 @@
     return patchBuffer.finalizeCode();
 }
 
-#if !USE(JSVALUE32_64)
+#if USE(JSVALUE64)
 void JIT::emitGetVariableObjectRegister(RegisterID variableObject, int index, RegisterID dst)
 {
     loadPtr(Address(variableObject, OBJECT_OFFSETOF(JSVariableObject, d)), dst);
diff --git a/JavaScriptCore/jit/JIT.h b/JavaScriptCore/jit/JIT.h
index 4a0deb2..3ef0538 100644
--- a/JavaScriptCore/jit/JIT.h
+++ b/JavaScriptCore/jit/JIT.h
@@ -516,8 +516,7 @@
         Jump emitJumpIfNotJSCell(RegisterID);
         void emitJumpSlowCaseIfNotJSCell(RegisterID);
         void emitJumpSlowCaseIfNotJSCell(RegisterID, int VReg);
-#if USE(JSVALUE64)
-#else
+#if USE(JSVALUE32_64)
         JIT::Jump emitJumpIfImmediateNumber(RegisterID reg)
         {
             return emitJumpIfImmediateInteger(reg);
@@ -535,7 +534,7 @@
         void emitJumpSlowCaseIfNotImmediateNumber(RegisterID);
         void emitJumpSlowCaseIfNotImmediateIntegers(RegisterID, RegisterID, RegisterID);
 
-#if !USE(JSVALUE64)
+#if USE(JSVALUE32_64)
         void emitFastArithDeTagImmediate(RegisterID);
         Jump emitFastArithDeTagImmediateJumpIfZero(RegisterID);
 #endif
diff --git a/JavaScriptCore/jit/JITArithmetic.cpp b/JavaScriptCore/jit/JITArithmetic.cpp
index d75f8b5..d4fa12f 100644
--- a/JavaScriptCore/jit/JITArithmetic.cpp
+++ b/JavaScriptCore/jit/JITArithmetic.cpp
@@ -26,7 +26,7 @@
 #include "config.h"
 
 #if ENABLE(JIT)
-#if !USE(JSVALUE32_64)
+#if USE(JSVALUE64)
 #include "JIT.h"
 
 #include "CodeBlock.h"
@@ -60,10 +60,6 @@
     emitFastArithImmToInt(regT0);
     emitFastArithImmToInt(regT2);
     lshift32(regT2, regT0);
-#if USE(JSVALUE32)
-    addSlowCase(branchAdd32(Overflow, regT0, regT0));
-    signExtend32ToPtr(regT0, regT0);
-#endif
     emitFastArithReTagImmediate(regT0, regT0);
     emitPutVirtualRegister(result);
 }
@@ -74,20 +70,10 @@
     unsigned op1 = currentInstruction[2].u.operand;
     unsigned op2 = currentInstruction[3].u.operand;
 
-#if USE(JSVALUE64)
     UNUSED_PARAM(op1);
     UNUSED_PARAM(op2);
     linkSlowCase(iter);
     linkSlowCase(iter);
-#else
-    // If we are limited to 32-bit immediates there is a third slow case, which required the operands to have been reloaded.
-    Jump notImm1 = getSlowCase(iter);
-    Jump notImm2 = getSlowCase(iter);
-    linkSlowCase(iter);
-    emitGetVirtualRegisters(op1, regT0, op2, regT2);
-    notImm1.link(this);
-    notImm2.link(this);
-#endif
     JITStubCall stubCall(this, cti_op_lshift);
     stubCall.addArgument(regT0);
     stubCall.addArgument(regT2);
@@ -110,20 +96,11 @@
         emitGetVirtualRegisters(op1, regT0, op2, regT2);
         if (supportsFloatingPointTruncate()) {
             Jump lhsIsInt = emitJumpIfImmediateInteger(regT0);
-#if USE(JSVALUE64)
             // supportsFloatingPoint() && USE(JSVALUE64) => 3 SlowCases
             addSlowCase(emitJumpIfNotImmediateNumber(regT0));
             addPtr(tagTypeNumberRegister, regT0);
             movePtrToDouble(regT0, fpRegT0);
             addSlowCase(branchTruncateDoubleToInt32(fpRegT0, regT0));
-#else
-            // supportsFloatingPoint() && !USE(JSVALUE64) => 5 SlowCases (of which 1 IfNotJSCell)
-            emitJumpSlowCaseIfNotJSCell(regT0, op1);
-            addSlowCase(checkStructure(regT0, m_globalData->numberStructure.get()));
-            loadDouble(Address(regT0, OBJECT_OFFSETOF(JSNumberCell, m_value)), fpRegT0);
-            addSlowCase(branchTruncateDoubleToInt32(fpRegT0, regT0));
-            addSlowCase(branchAdd32(Overflow, regT0, regT0));
-#endif
             lhsIsInt.link(this);
             emitJumpSlowCaseIfNotImmediateInteger(regT2);
         } else {
@@ -133,15 +110,8 @@
         }
         emitFastArithImmToInt(regT2);
         rshift32(regT2, regT0);
-#if USE(JSVALUE32)
-        signExtend32ToPtr(regT0, regT0);
-#endif
     }
-#if USE(JSVALUE64)
     emitFastArithIntToImmNoCheck(regT0, regT0);
-#else
-    orPtr(Imm32(JSImmediate::TagTypeNumber), regT0);
-#endif
     emitPutVirtualRegister(result);
 }
 
@@ -159,17 +129,9 @@
         stubCall.addArgument(op2, regT2);
     } else {
         if (supportsFloatingPointTruncate()) {
-#if USE(JSVALUE64)
             linkSlowCase(iter);
             linkSlowCase(iter);
             linkSlowCase(iter);
-#else
-            linkSlowCaseIfNotJSCell(iter, op1);
-            linkSlowCase(iter);
-            linkSlowCase(iter);
-            linkSlowCase(iter);
-            linkSlowCase(iter);
-#endif
             // 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.
@@ -206,10 +168,6 @@
         // as an immediate int.
         if (shift < 0 || !(shift & 31))
             addSlowCase(branch32(LessThan, regT0, Imm32(0)));
-#if USE(JSVALUE32)
-        addSlowCase(branchAdd32(Overflow, regT0, regT0));
-        signExtend32ToPtr(regT0, regT0);
-#endif
         emitFastArithReTagImmediate(regT0, regT0);
         emitPutVirtualRegister(dst, regT0);
         return;
@@ -222,10 +180,6 @@
     emitFastArithImmToInt(regT1);
     urshift32(regT1, regT0);
     addSlowCase(branch32(LessThan, regT0, Imm32(0)));
-#if USE(JSVALUE32)
-    addSlowCase(branchAdd32(Overflow, regT0, regT0));
-    signExtend32ToPtr(regT0, regT0);
-#endif
     emitFastArithReTagImmediate(regT0, regT0);
     emitPutVirtualRegister(dst, regT0);
 }
@@ -239,7 +193,6 @@
         int shift = getConstantOperand(op2).asInt32();
         // op1 = regT0
         linkSlowCase(iter); // int32 check
-#if USE(JSVALUE64)
         if (supportsFloatingPointTruncate()) {
             JumpList failures;
             failures.append(emitJumpIfNotImmediateNumber(regT0)); // op1 is not a double
@@ -255,18 +208,13 @@
             emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_rshift));
             failures.link(this);
         }
-#endif // JSVALUE64
         if (shift < 0 || !(shift & 31))
             linkSlowCase(iter); // failed to box in hot path
-#if USE(JSVALUE32)
-        linkSlowCase(iter); // Couldn't box result
-#endif
     } else {
         // op1 = regT0
         // op2 = regT1
         if (!isOperandConstantImmediateInt(op1)) {
             linkSlowCase(iter); // int32 check -- op1 is not an int
-#if USE(JSVALUE64)
             if (supportsFloatingPointTruncate()) {
                 JumpList failures;
                 failures.append(emitJumpIfNotImmediateNumber(regT0)); // op1 is not a double
@@ -282,14 +230,10 @@
                 emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_rshift));
                 failures.link(this);
             }
-#endif
         }
         
         linkSlowCase(iter); // int32 check - op2 is not an int
         linkSlowCase(iter); // Can't represent unsigned result as an immediate
-#if USE(JSVALUE32)
-        linkSlowCase(iter); // Couldn't box result
-#endif
     }
     
     JITStubCall stubCall(this, cti_op_urshift);
@@ -330,20 +274,12 @@
     if (isOperandConstantImmediateInt(op2)) {
         emitGetVirtualRegister(op1, regT0);
         emitJumpSlowCaseIfNotImmediateInteger(regT0);
-#if USE(JSVALUE64)
         int32_t op2imm = getConstantOperandImmediateInt(op2);
-#else
-        int32_t op2imm = static_cast<int32_t>(JSImmediate::rawValue(getConstantOperand(op2)));
-#endif
         addJump(branch32(GreaterThanOrEqual, regT0, Imm32(op2imm)), target);
     } else if (isOperandConstantImmediateInt(op1)) {
         emitGetVirtualRegister(op2, regT1);
         emitJumpSlowCaseIfNotImmediateInteger(regT1);
-#if USE(JSVALUE64)
         int32_t op1imm = getConstantOperandImmediateInt(op1);
-#else
-        int32_t op1imm = static_cast<int32_t>(JSImmediate::rawValue(getConstantOperand(op1)));
-#endif
         addJump(branch32(LessThanOrEqual, regT1, Imm32(op1imm)), target);
     } else {
         emitGetVirtualRegisters(op1, regT0, op2, regT1);
@@ -381,18 +317,9 @@
         linkSlowCase(iter);
 
         if (supportsFloatingPoint()) {
-#if USE(JSVALUE64)
             Jump fail1 = emitJumpIfNotImmediateNumber(regT0);
             addPtr(tagTypeNumberRegister, regT0);
             movePtrToDouble(regT0, fpRegT0);
-#else
-            Jump fail1;
-            if (!m_codeBlock->isKnownNotImmediate(op1))
-                fail1 = emitJumpIfNotJSCell(regT0);
-
-            Jump fail2 = checkStructure(regT0, m_globalData->numberStructure.get());
-            loadDouble(Address(regT0, OBJECT_OFFSETOF(JSNumberCell, m_value)), fpRegT0);
-#endif
 
             int32_t op2imm = getConstantOperand(op2).asInt32();;
 
@@ -403,13 +330,7 @@
 
             emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_jnless));
 
-#if USE(JSVALUE64)
             fail1.link(this);
-#else
-            if (!m_codeBlock->isKnownNotImmediate(op1))
-                fail1.link(this);
-            fail2.link(this);
-#endif
         }
 
         JITStubCall stubCall(this, cti_op_jless);
@@ -422,18 +343,9 @@
         linkSlowCase(iter);
 
         if (supportsFloatingPoint()) {
-#if USE(JSVALUE64)
             Jump fail1 = emitJumpIfNotImmediateNumber(regT1);
             addPtr(tagTypeNumberRegister, regT1);
             movePtrToDouble(regT1, fpRegT1);
-#else
-            Jump fail1;
-            if (!m_codeBlock->isKnownNotImmediate(op2))
-                fail1 = emitJumpIfNotJSCell(regT1);
-
-            Jump fail2 = checkStructure(regT1, m_globalData->numberStructure.get());
-            loadDouble(Address(regT1, OBJECT_OFFSETOF(JSNumberCell, m_value)), fpRegT1);
-#endif
 
             int32_t op1imm = getConstantOperand(op1).asInt32();;
 
@@ -444,13 +356,7 @@
 
             emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_jnless));
 
-#if USE(JSVALUE64)
             fail1.link(this);
-#else
-            if (!m_codeBlock->isKnownNotImmediate(op2))
-                fail1.link(this);
-            fail2.link(this);
-#endif
         }
 
         JITStubCall stubCall(this, cti_op_jless);
@@ -463,7 +369,6 @@
         linkSlowCase(iter);
 
         if (supportsFloatingPoint()) {
-#if USE(JSVALUE64)
             Jump fail1 = emitJumpIfNotImmediateNumber(regT0);
             Jump fail2 = emitJumpIfNotImmediateNumber(regT1);
             Jump fail3 = emitJumpIfImmediateInteger(regT1);
@@ -471,37 +376,14 @@
             addPtr(tagTypeNumberRegister, regT1);
             movePtrToDouble(regT0, fpRegT0);
             movePtrToDouble(regT1, fpRegT1);
-#else
-            Jump fail1;
-            if (!m_codeBlock->isKnownNotImmediate(op1))
-                fail1 = emitJumpIfNotJSCell(regT0);
-
-            Jump fail2;
-            if (!m_codeBlock->isKnownNotImmediate(op2))
-                fail2 = emitJumpIfNotJSCell(regT1);
-
-            Jump fail3 = checkStructure(regT0, m_globalData->numberStructure.get());
-            Jump fail4 = checkStructure(regT1, m_globalData->numberStructure.get());
-            loadDouble(Address(regT0, OBJECT_OFFSETOF(JSNumberCell, m_value)), fpRegT0);
-            loadDouble(Address(regT1, OBJECT_OFFSETOF(JSNumberCell, m_value)), fpRegT1);
-#endif
 
             emitJumpSlowToHot(branchDouble(DoubleLessThanOrEqualOrUnordered, fpRegT1, fpRegT0), target);
 
             emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_jnless));
 
-#if USE(JSVALUE64)
             fail1.link(this);
             fail2.link(this);
             fail3.link(this);
-#else
-            if (!m_codeBlock->isKnownNotImmediate(op1))
-                fail1.link(this);
-            if (!m_codeBlock->isKnownNotImmediate(op2))
-                fail2.link(this);
-            fail3.link(this);
-            fail4.link(this);
-#endif
         }
 
         linkSlowCase(iter);
@@ -545,20 +427,12 @@
     if (isOperandConstantImmediateInt(op2)) {
         emitGetVirtualRegister(op1, regT0);
         emitJumpSlowCaseIfNotImmediateInteger(regT0);
-#if USE(JSVALUE64)
         int32_t op2imm = getConstantOperandImmediateInt(op2);
-#else
-        int32_t op2imm = static_cast<int32_t>(JSImmediate::rawValue(getConstantOperand(op2)));
-#endif
         addJump(branch32(LessThan, regT0, Imm32(op2imm)), target);
     } else if (isOperandConstantImmediateInt(op1)) {
         emitGetVirtualRegister(op2, regT1);
         emitJumpSlowCaseIfNotImmediateInteger(regT1);
-#if USE(JSVALUE64)
         int32_t op1imm = getConstantOperandImmediateInt(op1);
-#else
-        int32_t op1imm = static_cast<int32_t>(JSImmediate::rawValue(getConstantOperand(op1)));
-#endif
         addJump(branch32(GreaterThan, regT1, Imm32(op1imm)), target);
     } else {
         emitGetVirtualRegisters(op1, regT0, op2, regT1);
@@ -596,18 +470,9 @@
         linkSlowCase(iter);
 
         if (supportsFloatingPoint()) {
-#if USE(JSVALUE64)
             Jump fail1 = emitJumpIfNotImmediateNumber(regT0);
             addPtr(tagTypeNumberRegister, regT0);
             movePtrToDouble(regT0, fpRegT0);
-#else
-            Jump fail1;
-            if (!m_codeBlock->isKnownNotImmediate(op1))
-                fail1 = emitJumpIfNotJSCell(regT0);
-
-            Jump fail2 = checkStructure(regT0, m_globalData->numberStructure.get());
-            loadDouble(Address(regT0, OBJECT_OFFSETOF(JSNumberCell, m_value)), fpRegT0);
-#endif
 
             int32_t op2imm = getConstantOperand(op2).asInt32();
 
@@ -618,13 +483,7 @@
 
             emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_jnless));
 
-#if USE(JSVALUE64)
             fail1.link(this);
-#else
-            if (!m_codeBlock->isKnownNotImmediate(op1))
-                fail1.link(this);
-            fail2.link(this);
-#endif
         }
 
         JITStubCall stubCall(this, cti_op_jless);
@@ -637,18 +496,9 @@
         linkSlowCase(iter);
 
         if (supportsFloatingPoint()) {
-#if USE(JSVALUE64)
             Jump fail1 = emitJumpIfNotImmediateNumber(regT1);
             addPtr(tagTypeNumberRegister, regT1);
             movePtrToDouble(regT1, fpRegT1);
-#else
-            Jump fail1;
-            if (!m_codeBlock->isKnownNotImmediate(op2))
-                fail1 = emitJumpIfNotJSCell(regT1);
-
-            Jump fail2 = checkStructure(regT1, m_globalData->numberStructure.get());
-            loadDouble(Address(regT1, OBJECT_OFFSETOF(JSNumberCell, m_value)), fpRegT1);
-#endif
 
             int32_t op1imm = getConstantOperand(op1).asInt32();
 
@@ -659,13 +509,7 @@
 
             emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_jnless));
 
-#if USE(JSVALUE64)
             fail1.link(this);
-#else
-            if (!m_codeBlock->isKnownNotImmediate(op2))
-                fail1.link(this);
-            fail2.link(this);
-#endif
         }
 
         JITStubCall stubCall(this, cti_op_jless);
@@ -678,7 +522,6 @@
         linkSlowCase(iter);
 
         if (supportsFloatingPoint()) {
-#if USE(JSVALUE64)
             Jump fail1 = emitJumpIfNotImmediateNumber(regT0);
             Jump fail2 = emitJumpIfNotImmediateNumber(regT1);
             Jump fail3 = emitJumpIfImmediateInteger(regT1);
@@ -686,37 +529,14 @@
             addPtr(tagTypeNumberRegister, regT1);
             movePtrToDouble(regT0, fpRegT0);
             movePtrToDouble(regT1, fpRegT1);
-#else
-            Jump fail1;
-            if (!m_codeBlock->isKnownNotImmediate(op1))
-                fail1 = emitJumpIfNotJSCell(regT0);
-
-            Jump fail2;
-            if (!m_codeBlock->isKnownNotImmediate(op2))
-                fail2 = emitJumpIfNotJSCell(regT1);
-
-            Jump fail3 = checkStructure(regT0, m_globalData->numberStructure.get());
-            Jump fail4 = checkStructure(regT1, m_globalData->numberStructure.get());
-            loadDouble(Address(regT0, OBJECT_OFFSETOF(JSNumberCell, m_value)), fpRegT0);
-            loadDouble(Address(regT1, OBJECT_OFFSETOF(JSNumberCell, m_value)), fpRegT1);
-#endif
 
             emitJumpSlowToHot(branchDouble(DoubleLessThan, fpRegT0, fpRegT1), target);
 
             emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_jnless));
 
-#if USE(JSVALUE64)
             fail1.link(this);
             fail2.link(this);
             fail3.link(this);
-#else
-            if (!m_codeBlock->isKnownNotImmediate(op1))
-                fail1.link(this);
-            if (!m_codeBlock->isKnownNotImmediate(op2))
-                fail2.link(this);
-            fail3.link(this);
-            fail4.link(this);
-#endif
         }
 
         linkSlowCase(iter);
@@ -760,20 +580,12 @@
     if (isOperandConstantImmediateInt(op2)) {
         emitGetVirtualRegister(op1, regT0);
         emitJumpSlowCaseIfNotImmediateInteger(regT0);
-#if USE(JSVALUE64)
         int32_t op2imm = getConstantOperandImmediateInt(op2);
-#else
-        int32_t op2imm = static_cast<int32_t>(JSImmediate::rawValue(getConstantOperand(op2)));
-#endif
         addJump(branch32(invert ? GreaterThan : LessThanOrEqual, regT0, Imm32(op2imm)), target);
     } else if (isOperandConstantImmediateInt(op1)) {
         emitGetVirtualRegister(op2, regT1);
         emitJumpSlowCaseIfNotImmediateInteger(regT1);
-#if USE(JSVALUE64)
         int32_t op1imm = getConstantOperandImmediateInt(op1);
-#else
-        int32_t op1imm = static_cast<int32_t>(JSImmediate::rawValue(getConstantOperand(op1)));
-#endif
         addJump(branch32(invert ? LessThan : GreaterThanOrEqual, regT1, Imm32(op1imm)), target);
     } else {
         emitGetVirtualRegisters(op1, regT0, op2, regT1);
@@ -812,18 +624,9 @@
         linkSlowCase(iter);
 
         if (supportsFloatingPoint()) {
-#if USE(JSVALUE64)
             Jump fail1 = emitJumpIfNotImmediateNumber(regT0);
             addPtr(tagTypeNumberRegister, regT0);
             movePtrToDouble(regT0, fpRegT0);
-#else
-            Jump fail1;
-            if (!m_codeBlock->isKnownNotImmediate(op1))
-                fail1 = emitJumpIfNotJSCell(regT0);
-
-            Jump fail2 = checkStructure(regT0, m_globalData->numberStructure.get());
-            loadDouble(Address(regT0, OBJECT_OFFSETOF(JSNumberCell, m_value)), fpRegT0);
-#endif
 
             int32_t op2imm = getConstantOperand(op2).asInt32();;
 
@@ -834,13 +637,7 @@
 
             emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_jnlesseq));
 
-#if USE(JSVALUE64)
             fail1.link(this);
-#else
-            if (!m_codeBlock->isKnownNotImmediate(op1))
-                fail1.link(this);
-            fail2.link(this);
-#endif
         }
 
         JITStubCall stubCall(this, cti_op_jlesseq);
@@ -853,18 +650,9 @@
         linkSlowCase(iter);
 
         if (supportsFloatingPoint()) {
-#if USE(JSVALUE64)
             Jump fail1 = emitJumpIfNotImmediateNumber(regT1);
             addPtr(tagTypeNumberRegister, regT1);
             movePtrToDouble(regT1, fpRegT1);
-#else
-            Jump fail1;
-            if (!m_codeBlock->isKnownNotImmediate(op2))
-                fail1 = emitJumpIfNotJSCell(regT1);
-
-            Jump fail2 = checkStructure(regT1, m_globalData->numberStructure.get());
-            loadDouble(Address(regT1, OBJECT_OFFSETOF(JSNumberCell, m_value)), fpRegT1);
-#endif
 
             int32_t op1imm = getConstantOperand(op1).asInt32();;
 
@@ -875,13 +663,7 @@
 
             emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_jnlesseq));
 
-#if USE(JSVALUE64)
             fail1.link(this);
-#else
-            if (!m_codeBlock->isKnownNotImmediate(op2))
-                fail1.link(this);
-            fail2.link(this);
-#endif
         }
 
         JITStubCall stubCall(this, cti_op_jlesseq);
@@ -894,7 +676,6 @@
         linkSlowCase(iter);
 
         if (supportsFloatingPoint()) {
-#if USE(JSVALUE64)
             Jump fail1 = emitJumpIfNotImmediateNumber(regT0);
             Jump fail2 = emitJumpIfNotImmediateNumber(regT1);
             Jump fail3 = emitJumpIfImmediateInteger(regT1);
@@ -902,37 +683,14 @@
             addPtr(tagTypeNumberRegister, regT1);
             movePtrToDouble(regT0, fpRegT0);
             movePtrToDouble(regT1, fpRegT1);
-#else
-            Jump fail1;
-            if (!m_codeBlock->isKnownNotImmediate(op1))
-                fail1 = emitJumpIfNotJSCell(regT0);
-
-            Jump fail2;
-            if (!m_codeBlock->isKnownNotImmediate(op2))
-                fail2 = emitJumpIfNotJSCell(regT1);
-
-            Jump fail3 = checkStructure(regT0, m_globalData->numberStructure.get());
-            Jump fail4 = checkStructure(regT1, m_globalData->numberStructure.get());
-            loadDouble(Address(regT0, OBJECT_OFFSETOF(JSNumberCell, m_value)), fpRegT0);
-            loadDouble(Address(regT1, OBJECT_OFFSETOF(JSNumberCell, m_value)), fpRegT1);
-#endif
 
             emitJumpSlowToHot(branchDouble(invert ? DoubleLessThanOrUnordered : DoubleGreaterThanOrEqual, fpRegT1, fpRegT0), target);
 
             emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_jnlesseq));
 
-#if USE(JSVALUE64)
             fail1.link(this);
             fail2.link(this);
             fail3.link(this);
-#else
-            if (!m_codeBlock->isKnownNotImmediate(op1))
-                fail1.link(this);
-            if (!m_codeBlock->isKnownNotImmediate(op2))
-                fail2.link(this);
-            fail3.link(this);
-            fail4.link(this);
-#endif
         }
 
         linkSlowCase(iter);
@@ -963,25 +721,17 @@
     if (isOperandConstantImmediateInt(op1)) {
         emitGetVirtualRegister(op2, regT0);
         emitJumpSlowCaseIfNotImmediateInteger(regT0);
-#if USE(JSVALUE64)
         int32_t imm = getConstantOperandImmediateInt(op1);
         andPtr(Imm32(imm), regT0);
         if (imm >= 0)
             emitFastArithIntToImmNoCheck(regT0, regT0);
-#else
-        andPtr(Imm32(static_cast<int32_t>(JSImmediate::rawValue(getConstantOperand(op1)))), regT0);
-#endif
     } else if (isOperandConstantImmediateInt(op2)) {
         emitGetVirtualRegister(op1, regT0);
         emitJumpSlowCaseIfNotImmediateInteger(regT0);
-#if USE(JSVALUE64)
         int32_t imm = getConstantOperandImmediateInt(op2);
         andPtr(Imm32(imm), regT0);
         if (imm >= 0)
             emitFastArithIntToImmNoCheck(regT0, regT0);
-#else
-        andPtr(Imm32(static_cast<int32_t>(JSImmediate::rawValue(getConstantOperand(op2)))), regT0);
-#endif
     } else {
         emitGetVirtualRegisters(op1, regT0, op2, regT1);
         andPtr(regT1, regT0);
@@ -1023,13 +773,8 @@
     emitGetVirtualRegister(srcDst, regT0);
     move(regT0, regT1);
     emitJumpSlowCaseIfNotImmediateInteger(regT0);
-#if USE(JSVALUE64)
     addSlowCase(branchAdd32(Overflow, Imm32(1), regT1));
     emitFastArithIntToImmNoCheck(regT1, regT1);
-#else
-    addSlowCase(branchAdd32(Overflow, Imm32(1 << JSImmediate::IntegerPayloadShift), regT1));
-    signExtend32ToPtr(regT1, regT1);
-#endif
     emitPutVirtualRegister(srcDst, regT1);
     emitPutVirtualRegister(result);
 }
@@ -1055,13 +800,8 @@
     emitGetVirtualRegister(srcDst, regT0);
     move(regT0, regT1);
     emitJumpSlowCaseIfNotImmediateInteger(regT0);
-#if USE(JSVALUE64)
     addSlowCase(branchSub32(Zero, Imm32(1), regT1));
     emitFastArithIntToImmNoCheck(regT1, regT1);
-#else
-    addSlowCase(branchSub32(Zero, Imm32(1 << JSImmediate::IntegerPayloadShift), regT1));
-    signExtend32ToPtr(regT1, regT1);
-#endif
     emitPutVirtualRegister(srcDst, regT1);
     emitPutVirtualRegister(result);
 }
@@ -1085,13 +825,8 @@
 
     emitGetVirtualRegister(srcDst, regT0);
     emitJumpSlowCaseIfNotImmediateInteger(regT0);
-#if USE(JSVALUE64)
     addSlowCase(branchAdd32(Overflow, Imm32(1), regT0));
     emitFastArithIntToImmNoCheck(regT0, regT0);
-#else
-    addSlowCase(branchAdd32(Overflow, Imm32(1 << JSImmediate::IntegerPayloadShift), regT0));
-    signExtend32ToPtr(regT0, regT0);
-#endif
     emitPutVirtualRegister(srcDst);
 }
 
@@ -1114,13 +849,8 @@
 
     emitGetVirtualRegister(srcDst, regT0);
     emitJumpSlowCaseIfNotImmediateInteger(regT0);
-#if USE(JSVALUE64)
     addSlowCase(branchSub32(Zero, Imm32(1), regT0));
     emitFastArithIntToImmNoCheck(regT0, regT0);
-#else
-    addSlowCase(branchSub32(Zero, Imm32(1 << JSImmediate::IntegerPayloadShift), regT0));
-    signExtend32ToPtr(regT0, regT0);
-#endif
     emitPutVirtualRegister(srcDst);
 }
 
@@ -1158,22 +888,9 @@
     emitJumpSlowCaseIfNotImmediateInteger(regT0);
     emitJumpSlowCaseIfNotImmediateInteger(regT2);
 
-#if USE(JSVALUE64)
     addSlowCase(branchPtr(Equal, regT2, ImmPtr(JSValue::encode(jsNumber(m_globalData, 0)))));
     m_assembler.cdq();
     m_assembler.idivl_r(regT2);
-#else
-    emitFastArithDeTagImmediate(regT0);
-    addSlowCase(emitFastArithDeTagImmediateJumpIfZero(regT2));
-#if CPU(X86) || CPU(X86_64)
-    m_assembler.cdq();
-    m_assembler.idivl_r(regT2);
-    signExtend32ToPtr(regT1, regT1);
-#elif CPU(MIPS)
-    m_assembler.div(regT0, regT2);
-    m_assembler.mfhi(regT1);
-#endif
-#endif
     emitFastArithReTagImmediate(regT1, regT0);
     emitPutVirtualRegister(result);
 }
@@ -1182,19 +899,9 @@
 {
     unsigned result = currentInstruction[1].u.operand;
 
-#if USE(JSVALUE64)
     linkSlowCase(iter);
     linkSlowCase(iter);
     linkSlowCase(iter);
-#else
-    Jump notImm1 = getSlowCase(iter);
-    Jump notImm2 = getSlowCase(iter);
-    linkSlowCase(iter);
-    emitFastArithReTagImmediate(regT0, regT0);
-    emitFastArithReTagImmediate(regT2, regT2);
-    notImm1.link(this);
-    notImm2.link(this);
-#endif
     JITStubCall stubCall(this, cti_op_mod);
     stubCall.addArgument(regT0);
     stubCall.addArgument(regT2);
@@ -1249,8 +956,6 @@
 
 /* ------------------------------ END: OP_MOD ------------------------------ */
 
-#if USE(JSVALUE64)
-
 /* ------------------------------ BEGIN: USE(JSVALUE64) (OP_ADD, OP_SUB, OP_MUL) ------------------------------ */
 
 void JIT::compileBinaryArithOp(OpcodeID opcodeID, unsigned, unsigned op1, unsigned op2, OperandTypes)
@@ -1543,310 +1248,9 @@
     compileBinaryArithOpSlowCase(op_sub, iter, result, op1, op2, types, false, false);
 }
 
-#else // USE(JSVALUE64)
-
-/* ------------------------------ BEGIN: !USE(JSVALUE64) (OP_ADD, OP_SUB, OP_MUL) ------------------------------ */
-
-void JIT::compileBinaryArithOp(OpcodeID opcodeID, unsigned dst, unsigned src1, unsigned src2, OperandTypes types)
-{
-    Structure* numberStructure = m_globalData->numberStructure.get();
-    Jump wasJSNumberCell1;
-    Jump wasJSNumberCell2;
-
-    emitGetVirtualRegisters(src1, regT0, src2, regT1);
-
-    if (types.second().isReusable() && supportsFloatingPoint()) {
-        ASSERT(types.second().mightBeNumber());
-
-        // Check op2 is a number
-        Jump op2imm = emitJumpIfImmediateInteger(regT1);
-        if (!types.second().definitelyIsNumber()) {
-            emitJumpSlowCaseIfNotJSCell(regT1, src2);
-            addSlowCase(checkStructure(regT1, numberStructure));
-        }
-
-        // (1) In this case src2 is a reusable number cell.
-        //     Slow case if src1 is not a number type.
-        Jump op1imm = emitJumpIfImmediateInteger(regT0);
-        if (!types.first().definitelyIsNumber()) {
-            emitJumpSlowCaseIfNotJSCell(regT0, src1);
-            addSlowCase(checkStructure(regT0, numberStructure));
-        }
-
-        // (1a) if we get here, src1 is also a number cell
-        loadDouble(Address(regT0, OBJECT_OFFSETOF(JSNumberCell, m_value)), fpRegT0);
-        Jump loadedDouble = jump();
-        // (1b) if we get here, src1 is an immediate
-        op1imm.link(this);
-        emitFastArithImmToInt(regT0);
-        convertInt32ToDouble(regT0, fpRegT0);
-        // (1c)
-        loadedDouble.link(this);
-        if (opcodeID == op_add)
-            addDouble(Address(regT1, OBJECT_OFFSETOF(JSNumberCell, m_value)), fpRegT0);
-        else if (opcodeID == op_sub)
-            subDouble(Address(regT1, OBJECT_OFFSETOF(JSNumberCell, m_value)), fpRegT0);
-        else {
-            ASSERT(opcodeID == op_mul);
-            mulDouble(Address(regT1, OBJECT_OFFSETOF(JSNumberCell, m_value)), fpRegT0);
-        }
-
-        // Store the result to the JSNumberCell and jump.
-        storeDouble(fpRegT0, Address(regT1, OBJECT_OFFSETOF(JSNumberCell, m_value)));
-        move(regT1, regT0);
-        emitPutVirtualRegister(dst);
-        wasJSNumberCell2 = jump();
-
-        // (2) This handles cases where src2 is an immediate number.
-        //     Two slow cases - either src1 isn't an immediate, or the subtract overflows.
-        op2imm.link(this);
-        emitJumpSlowCaseIfNotImmediateInteger(regT0);
-    } else if (types.first().isReusable() && supportsFloatingPoint()) {
-        ASSERT(types.first().mightBeNumber());
-
-        // Check op1 is a number
-        Jump op1imm = emitJumpIfImmediateInteger(regT0);
-        if (!types.first().definitelyIsNumber()) {
-            emitJumpSlowCaseIfNotJSCell(regT0, src1);
-            addSlowCase(checkStructure(regT0, numberStructure));
-        }
-
-        // (1) In this case src1 is a reusable number cell.
-        //     Slow case if src2 is not a number type.
-        Jump op2imm = emitJumpIfImmediateInteger(regT1);
-        if (!types.second().definitelyIsNumber()) {
-            emitJumpSlowCaseIfNotJSCell(regT1, src2);
-            addSlowCase(checkStructure(regT1, numberStructure));
-        }
-
-        // (1a) if we get here, src2 is also a number cell
-        loadDouble(Address(regT1, OBJECT_OFFSETOF(JSNumberCell, m_value)), fpRegT1);
-        Jump loadedDouble = jump();
-        // (1b) if we get here, src2 is an immediate
-        op2imm.link(this);
-        emitFastArithImmToInt(regT1);
-        convertInt32ToDouble(regT1, fpRegT1);
-        // (1c)
-        loadedDouble.link(this);
-        loadDouble(Address(regT0, OBJECT_OFFSETOF(JSNumberCell, m_value)), fpRegT0);
-        if (opcodeID == op_add)
-            addDouble(fpRegT1, fpRegT0);
-        else if (opcodeID == op_sub)
-            subDouble(fpRegT1, fpRegT0);
-        else {
-            ASSERT(opcodeID == op_mul);
-            mulDouble(fpRegT1, fpRegT0);
-        }
-        storeDouble(fpRegT0, Address(regT0, OBJECT_OFFSETOF(JSNumberCell, m_value)));
-        emitPutVirtualRegister(dst);
-
-        // Store the result to the JSNumberCell and jump.
-        storeDouble(fpRegT0, Address(regT0, OBJECT_OFFSETOF(JSNumberCell, m_value)));
-        emitPutVirtualRegister(dst);
-        wasJSNumberCell1 = jump();
-
-        // (2) This handles cases where src1 is an immediate number.
-        //     Two slow cases - either src2 isn't an immediate, or the subtract overflows.
-        op1imm.link(this);
-        emitJumpSlowCaseIfNotImmediateInteger(regT1);
-    } else
-        emitJumpSlowCaseIfNotImmediateIntegers(regT0, regT1, regT2);
-
-    if (opcodeID == op_add) {
-        emitFastArithDeTagImmediate(regT0);
-        addSlowCase(branchAdd32(Overflow, regT1, regT0));
-    } else  if (opcodeID == op_sub) {
-        addSlowCase(branchSub32(Overflow, regT1, regT0));
-        signExtend32ToPtr(regT0, regT0);
-        emitFastArithReTagImmediate(regT0, regT0);
-    } else {
-        ASSERT(opcodeID == op_mul);
-        // convert eax & edx from JSImmediates to ints, and check if either are zero
-        emitFastArithImmToInt(regT1);
-        Jump op1Zero = emitFastArithDeTagImmediateJumpIfZero(regT0);
-        Jump op2NonZero = branchTest32(NonZero, regT1);
-        op1Zero.link(this);
-        // if either input is zero, add the two together, and check if the result is < 0.
-        // If it is, we have a problem (N < 0), (N * 0) == -0, not representatble as a JSImmediate.
-        move(regT0, regT2);
-        addSlowCase(branchAdd32(Signed, regT1, regT2));
-        // Skip the above check if neither input is zero
-        op2NonZero.link(this);
-        addSlowCase(branchMul32(Overflow, regT1, regT0));
-        signExtend32ToPtr(regT0, regT0);
-        emitFastArithReTagImmediate(regT0, regT0);
-    }
-    emitPutVirtualRegister(dst);
-
-    if (types.second().isReusable() && supportsFloatingPoint())
-        wasJSNumberCell2.link(this);
-    else if (types.first().isReusable() && supportsFloatingPoint())
-        wasJSNumberCell1.link(this);
-}
-
-void JIT::compileBinaryArithOpSlowCase(OpcodeID opcodeID, Vector<SlowCaseEntry>::iterator& iter, unsigned dst, unsigned src1, unsigned src2, OperandTypes types)
-{
-    linkSlowCase(iter);
-    if (types.second().isReusable() && supportsFloatingPoint()) {
-        if (!types.first().definitelyIsNumber()) {
-            linkSlowCaseIfNotJSCell(iter, src1);
-            linkSlowCase(iter);
-        }
-        if (!types.second().definitelyIsNumber()) {
-            linkSlowCaseIfNotJSCell(iter, src2);
-            linkSlowCase(iter);
-        }
-    } else if (types.first().isReusable() && supportsFloatingPoint()) {
-        if (!types.first().definitelyIsNumber()) {
-            linkSlowCaseIfNotJSCell(iter, src1);
-            linkSlowCase(iter);
-        }
-        if (!types.second().definitelyIsNumber()) {
-            linkSlowCaseIfNotJSCell(iter, src2);
-            linkSlowCase(iter);
-        }
-    }
-    linkSlowCase(iter);
-
-    // additional entry point to handle -0 cases.
-    if (opcodeID == op_mul)
-        linkSlowCase(iter);
-
-    JITStubCall stubCall(this, opcodeID == op_add ? cti_op_add : opcodeID == op_sub ? cti_op_sub : cti_op_mul);
-    stubCall.addArgument(src1, regT2);
-    stubCall.addArgument(src2, regT2);
-    stubCall.call(dst);
-}
-
-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;
-    OperandTypes types = OperandTypes::fromInt(currentInstruction[4].u.operand);
-
-    if (!types.first().mightBeNumber() || !types.second().mightBeNumber()) {
-        JITStubCall stubCall(this, cti_op_add);
-        stubCall.addArgument(op1, regT2);
-        stubCall.addArgument(op2, regT2);
-        stubCall.call(result);
-        return;
-    }
-
-    if (isOperandConstantImmediateInt(op1)) {
-        emitGetVirtualRegister(op2, regT0);
-        emitJumpSlowCaseIfNotImmediateInteger(regT0);
-        addSlowCase(branchAdd32(Overflow, Imm32(getConstantOperandImmediateInt(op1) << JSImmediate::IntegerPayloadShift), regT0));
-        signExtend32ToPtr(regT0, regT0);
-        emitPutVirtualRegister(result);
-    } else if (isOperandConstantImmediateInt(op2)) {
-        emitGetVirtualRegister(op1, regT0);
-        emitJumpSlowCaseIfNotImmediateInteger(regT0);
-        addSlowCase(branchAdd32(Overflow, Imm32(getConstantOperandImmediateInt(op2) << JSImmediate::IntegerPayloadShift), regT0));
-        signExtend32ToPtr(regT0, regT0);
-        emitPutVirtualRegister(result);
-    } else {
-        compileBinaryArithOp(op_add, result, op1, op2, OperandTypes::fromInt(currentInstruction[4].u.operand));
-    }
-}
-
-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;
-
-    OperandTypes types = OperandTypes::fromInt(currentInstruction[4].u.operand);
-    if (!types.first().mightBeNumber() || !types.second().mightBeNumber())
-        return;
-
-    if (isOperandConstantImmediateInt(op1)) {
-        Jump notImm = getSlowCase(iter);
-        linkSlowCase(iter);
-        sub32(Imm32(getConstantOperandImmediateInt(op1) << JSImmediate::IntegerPayloadShift), regT0);
-        notImm.link(this);
-        JITStubCall stubCall(this, cti_op_add);
-        stubCall.addArgument(op1, regT2);
-        stubCall.addArgument(regT0);
-        stubCall.call(result);
-    } else if (isOperandConstantImmediateInt(op2)) {
-        Jump notImm = getSlowCase(iter);
-        linkSlowCase(iter);
-        sub32(Imm32(getConstantOperandImmediateInt(op2) << JSImmediate::IntegerPayloadShift), regT0);
-        notImm.link(this);
-        JITStubCall stubCall(this, cti_op_add);
-        stubCall.addArgument(regT0);
-        stubCall.addArgument(op2, regT2);
-        stubCall.call(result);
-    } else {
-        OperandTypes types = OperandTypes::fromInt(currentInstruction[4].u.operand);
-        ASSERT(types.first().mightBeNumber() && types.second().mightBeNumber());
-        compileBinaryArithOpSlowCase(op_add, iter, result, op1, op2, types);
-    }
-}
-
-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;
-
-    // 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)) {
-        emitGetVirtualRegister(op2, regT0);
-        emitJumpSlowCaseIfNotImmediateInteger(regT0);
-        emitFastArithDeTagImmediate(regT0);
-        addSlowCase(branchMul32(Overflow, Imm32(value), regT0, regT0));
-        signExtend32ToPtr(regT0, regT0);
-        emitFastArithReTagImmediate(regT0, regT0);
-        emitPutVirtualRegister(result);
-    } else if (isOperandConstantImmediateInt(op2) && ((value = getConstantOperandImmediateInt(op2)) > 0)) {
-        emitGetVirtualRegister(op1, regT0);
-        emitJumpSlowCaseIfNotImmediateInteger(regT0);
-        emitFastArithDeTagImmediate(regT0);
-        addSlowCase(branchMul32(Overflow, Imm32(value), regT0, regT0));
-        signExtend32ToPtr(regT0, regT0);
-        emitFastArithReTagImmediate(regT0, regT0);
-        emitPutVirtualRegister(result);
-    } else
-        compileBinaryArithOp(op_mul, result, op1, op2, OperandTypes::fromInt(currentInstruction[4].u.operand));
-}
-
-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;
-
-    if ((isOperandConstantImmediateInt(op1) && (getConstantOperandImmediateInt(op1) > 0))
-        || (isOperandConstantImmediateInt(op2) && (getConstantOperandImmediateInt(op2) > 0))) {
-        linkSlowCase(iter);
-        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_mul);
-        stubCall.addArgument(op1, regT2);
-        stubCall.addArgument(op2, regT2);
-        stubCall.call(result);
-    } else
-        compileBinaryArithOpSlowCase(op_mul, iter, result, op1, op2, OperandTypes::fromInt(currentInstruction[4].u.operand));
-}
-
-void JIT::emit_op_sub(Instruction* currentInstruction)
-{
-    compileBinaryArithOp(op_sub, currentInstruction[1].u.operand, currentInstruction[2].u.operand, currentInstruction[3].u.operand, OperandTypes::fromInt(currentInstruction[4].u.operand));
-}
-
-void JIT::emitSlow_op_sub(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
-{
-    compileBinaryArithOpSlowCase(op_sub, iter, currentInstruction[1].u.operand, currentInstruction[2].u.operand, currentInstruction[3].u.operand, OperandTypes::fromInt(currentInstruction[4].u.operand));
-}
-
-#endif // USE(JSVALUE64)
-
 /* ------------------------------ END: OP_ADD, OP_SUB, OP_MUL ------------------------------ */
 
 } // namespace JSC
 
-#endif // !USE(JSVALUE32_64)
+#endif // USE(JSVALUE64)
 #endif // ENABLE(JIT)
diff --git a/JavaScriptCore/jit/JITCall.cpp b/JavaScriptCore/jit/JITCall.cpp
index 368eab9..fdd0d47 100644
--- a/JavaScriptCore/jit/JITCall.cpp
+++ b/JavaScriptCore/jit/JITCall.cpp
@@ -26,7 +26,7 @@
 #include "config.h"
 
 #if ENABLE(JIT)
-#if !USE(JSVALUE32_64)
+#if USE(JSVALUE64)
 #include "JIT.h"
 
 #include "CodeBlock.h"
@@ -257,5 +257,5 @@
 
 } // namespace JSC
 
-#endif // !USE(JSVALUE32_64)
+#endif // USE(JSVALUE64)
 #endif // ENABLE(JIT)
diff --git a/JavaScriptCore/jit/JITInlineMethods.h b/JavaScriptCore/jit/JITInlineMethods.h
index e2e77db..0fe9929 100644
--- a/JavaScriptCore/jit/JITInlineMethods.h
+++ b/JavaScriptCore/jit/JITInlineMethods.h
@@ -63,7 +63,7 @@
 ALWAYS_INLINE void JIT::emitGetFromCallFrameHeaderPtr(RegisterFile::CallFrameHeaderEntry entry, RegisterID to, RegisterID from)
 {
     loadPtr(Address(from, entry * sizeof(Register)), to);
-#if !USE(JSVALUE32_64)
+#if USE(JSVALUE64)
     killLastResultRegister();
 #endif
 }
@@ -81,7 +81,7 @@
 ALWAYS_INLINE void JIT::emitGetFromCallFrameHeader32(RegisterFile::CallFrameHeaderEntry entry, RegisterID to, RegisterID from)
 {
     load32(Address(from, entry * sizeof(Register)), to);
-#if !USE(JSVALUE32_64)
+#if USE(JSVALUE64)
     killLastResultRegister();
 #endif
 }
@@ -750,7 +750,7 @@
     addSlowCase(emitJumpIfNotImmediateNumber(reg));
 }
 
-#if !USE(JSVALUE64)
+#if USE(JSVALUE32_64)
 ALWAYS_INLINE void JIT::emitFastArithDeTagImmediate(RegisterID reg)
 {
     subPtr(Imm32(JSImmediate::TagTypeNumber), reg);
diff --git a/JavaScriptCore/jit/JITOpcodes.cpp b/JavaScriptCore/jit/JITOpcodes.cpp
index ebd22bb..a468c18 100644
--- a/JavaScriptCore/jit/JITOpcodes.cpp
+++ b/JavaScriptCore/jit/JITOpcodes.cpp
@@ -39,7 +39,7 @@
 
 namespace JSC {
 
-#if !USE(JSVALUE32_64)
+#if USE(JSVALUE64)
 
 #define RECORD_JUMP_TARGET(targetOffset) \
    do { m_labels[m_bytecodeOffset + (targetOffset)].used(); } while (false)
@@ -361,11 +361,7 @@
     if (isOperandConstantImmediateInt(op2)) {
         emitGetVirtualRegister(op1, regT0);
         emitJumpSlowCaseIfNotImmediateInteger(regT0);
-#if USE(JSVALUE64)
         int32_t op2imm = getConstantOperandImmediateInt(op2);
-#else
-        int32_t op2imm = static_cast<int32_t>(JSImmediate::rawValue(getConstantOperand(op2)));
-#endif
         addJump(branch32(LessThanOrEqual, regT0, Imm32(op2imm)), target);
     } else {
         emitGetVirtualRegisters(op1, regT0, op2, regT1);
@@ -810,12 +806,8 @@
 {
     emitGetVirtualRegister(currentInstruction[2].u.operand, regT0);
     emitJumpSlowCaseIfNotImmediateInteger(regT0);
-#if USE(JSVALUE64)
     not32(regT0);
     emitFastArithIntToImmNoCheck(regT0, regT0);
-#else
-    xorPtr(Imm32(~JSImmediate::TagTypeNumber), regT0);
-#endif
     emitPutVirtualRegister(currentInstruction[1].u.operand);
 }
 
@@ -951,11 +943,7 @@
     loadPtr(addressFor(it), regT1);
     loadPtr(Address(regT1, OBJECT_OFFSETOF(JSPropertyNameIterator, m_jsStrings)), regT2);
 
-#if USE(JSVALUE64)
     loadPtr(BaseIndex(regT2, regT0, TimesEight), regT2);
-#else
-    loadPtr(BaseIndex(regT2, regT0, TimesFour), regT2);
-#endif
 
     emitPutVirtualRegister(dst, regT2);
 
@@ -1613,7 +1601,7 @@
     stubCall.call(dst);
 }
 
-#endif // !USE(JSVALUE32_64)
+#endif // USE(JSVALUE64)
 
 void JIT::emit_op_resolve_global_dynamic(Instruction* currentInstruction)
 {
diff --git a/JavaScriptCore/jit/JITPropertyAccess.cpp b/JavaScriptCore/jit/JITPropertyAccess.cpp
index 7c129a5..2edc860 100644
--- a/JavaScriptCore/jit/JITPropertyAccess.cpp
+++ b/JavaScriptCore/jit/JITPropertyAccess.cpp
@@ -26,7 +26,7 @@
 #include "config.h"
 
 #if ENABLE(JIT)
-#if !USE(JSVALUE32_64)
+#if USE(JSVALUE64)
 #include "JIT.h"
 
 #include "CodeBlock.h"
@@ -89,7 +89,7 @@
 
     emitGetVirtualRegisters(base, regT0, property, regT1);
     emitJumpSlowCaseIfNotImmediateInteger(regT1);
-#if USE(JSVALUE64)
+
     // This is technically incorrect - we're zero-extending an int32.  On the hot path this doesn't matter.
     // We check the value as if it was a uint32 against the m_vectorLength - which will always fail if
     // number was signed since m_vectorLength is always less than intmax (since the total allocation
@@ -97,9 +97,7 @@
     // to 64-bits is necessary since it's used in the address calculation.  We zero extend rather than sign
     // extending since it makes it easier to re-tag the value in the slow case.
     zeroExtend32ToPtr(regT1, regT1);
-#else
-    emitFastArithImmToInt(regT1);
-#endif
+
     emitJumpSlowCaseIfNotJSCell(regT0, base);
     addSlowCase(branchPtr(NotEqual, Address(regT0), ImmPtr(m_globalData->jsArrayVPtr)));
 
@@ -204,12 +202,8 @@
 
     emitGetVirtualRegisters(base, regT0, property, regT1);
     emitJumpSlowCaseIfNotImmediateInteger(regT1);
-#if USE(JSVALUE64)
     // See comment in op_get_by_val.
     zeroExtend32ToPtr(regT1, regT1);
-#else
-    emitFastArithImmToInt(regT1);
-#endif
     emitJumpSlowCaseIfNotJSCell(regT0, base);
     addSlowCase(branchPtr(NotEqual, Address(regT0), ImmPtr(m_globalData->jsArrayVPtr)));
     addSlowCase(branch32(AboveOrEqual, regT1, Address(regT0, OBJECT_OFFSETOF(JSArray, m_vectorLength))));
@@ -1103,5 +1097,5 @@
 
 } // namespace JSC
 
-#endif // !USE(JSVALUE32_64)
+#endif // USE(JSVALUE64)
 #endif // ENABLE(JIT)
diff --git a/JavaScriptCore/jit/JITStubs.h b/JavaScriptCore/jit/JITStubs.h
index c884195..b91a074 100644
--- a/JavaScriptCore/jit/JITStubs.h
+++ b/JavaScriptCore/jit/JITStubs.h
@@ -147,7 +147,7 @@
     struct JITStackFrame {
         JITStubArg reserved; // Unused
         JITStubArg args[6];
-#if !USE(JSVALUE32_64)
+#if USE(JSVALUE64)
         void* padding; // Maintain 16-byte stack alignment.
 #endif
 
diff --git a/JavaScriptCore/jit/JSInterfaceJIT.h b/JavaScriptCore/jit/JSInterfaceJIT.h
index 031bfa8..6453bab 100644
--- a/JavaScriptCore/jit/JSInterfaceJIT.h
+++ b/JavaScriptCore/jit/JSInterfaceJIT.h
@@ -166,7 +166,7 @@
         inline Address tagFor(unsigned index, RegisterID base = callFrameRegister);
 #endif
 
-#if USE(JSVALUE32) || USE(JSVALUE64)
+#if USE(JSVALUE64)
         Jump emitJumpIfImmediateNumber(RegisterID reg);
         Jump emitJumpIfNotImmediateNumber(RegisterID reg);
         void emitFastArithImmToInt(RegisterID reg);
@@ -273,35 +273,7 @@
     
 #endif
 
-#if USE(JSVALUE32)
-    inline JSInterfaceJIT::Jump JSInterfaceJIT::emitLoadJSCell(unsigned virtualRegisterIndex, RegisterID dst)
-    {
-        loadPtr(addressFor(virtualRegisterIndex), dst);
-        return branchTest32(NonZero, dst, Imm32(JSImmediate::TagMask));
-    }
-
-    inline JSInterfaceJIT::Jump JSInterfaceJIT::emitLoadInt32(unsigned virtualRegisterIndex, RegisterID dst)
-    {
-        loadPtr(addressFor(virtualRegisterIndex), dst);
-        Jump result = branchTest32(Zero, dst, Imm32(JSImmediate::TagTypeNumber));
-        rshift32(Imm32(JSImmediate::IntegerPayloadShift), dst);
-        return result;
-    }
-
-    inline JSInterfaceJIT::Jump JSInterfaceJIT::emitLoadDouble(unsigned, FPRegisterID, RegisterID)
-    {
-        ASSERT_NOT_REACHED();
-        return jump();
-    }
-    
-    ALWAYS_INLINE void JSInterfaceJIT::emitFastArithImmToInt(RegisterID reg)
-    {
-        rshift32(Imm32(JSImmediate::IntegerPayloadShift), reg);
-    }
-    
-#endif
-
-#if !USE(JSVALUE32_64)
+#if USE(JSVALUE64)
     inline JSInterfaceJIT::Address JSInterfaceJIT::payloadFor(unsigned virtualRegisterIndex, RegisterID base)
     {
         ASSERT(static_cast<int>(virtualRegisterIndex) < FirstConstantRegisterIndex);
diff --git a/JavaScriptCore/jit/SpecializedThunkJIT.h b/JavaScriptCore/jit/SpecializedThunkJIT.h
index 57515fb..5c593d9 100644
--- a/JavaScriptCore/jit/SpecializedThunkJIT.h
+++ b/JavaScriptCore/jit/SpecializedThunkJIT.h
@@ -96,14 +96,10 @@
 #if USE(JSVALUE64)
             moveDoubleToPtr(src, regT0);
             subPtr(tagTypeNumberRegister, regT0);
-#elif USE(JSVALUE32_64)
+#else
             storeDouble(src, Address(stackPointerRegister, -(int)sizeof(double)));
             loadPtr(Address(stackPointerRegister, OBJECT_OFFSETOF(JSValue, u.asBits.tag) - sizeof(double)), regT1);
             loadPtr(Address(stackPointerRegister, OBJECT_OFFSETOF(JSValue, u.asBits.payload) - sizeof(double)), regT0);
-#else
-            UNUSED_PARAM(src);
-            ASSERT_NOT_REACHED();
-            m_failures.append(jump());
 #endif
             loadPtr(Address(callFrameRegister, RegisterFile::CallerFrame * (int)sizeof(Register)), callFrameRegister);
             ret();
@@ -144,13 +140,8 @@
         {
 #if USE(JSVALUE64)
             orPtr(tagTypeNumberRegister, regT0);
-#elif USE(JSVALUE32_64)
-            move(Imm32(JSValue::Int32Tag), regT1);
 #else
-            signExtend32ToPtr(regT0, regT0);
-            // If we can't tag the result, give up and jump to the slow case
-            m_failures.append(branchAddPtr(Overflow, regT0, regT0));
-            addPtr(Imm32(JSImmediate::TagTypeNumber), regT0);
+            move(Imm32(JSValue::Int32Tag), regT1);
 #endif
         }
 
diff --git a/JavaScriptCore/jit/ThunkGenerators.cpp b/JavaScriptCore/jit/ThunkGenerators.cpp
index 4c7a354..9b40f12 100644
--- a/JavaScriptCore/jit/ThunkGenerators.cpp
+++ b/JavaScriptCore/jit/ThunkGenerators.cpp
@@ -92,7 +92,6 @@
 
 MacroAssemblerCodePtr sqrtThunkGenerator(JSGlobalData* globalData, ExecutablePool* pool)
 {
-#if USE(JSVALUE64) || USE(JSVALUE32_64)
     SpecializedThunkJIT jit(1, globalData, pool);
     if (!jit.supportsFloatingPointSqrt())
         return globalData->jitStubs->ctiNativeCall();
@@ -101,10 +100,6 @@
     jit.sqrtDouble(SpecializedThunkJIT::fpRegT0, SpecializedThunkJIT::fpRegT0);
     jit.returnDouble(SpecializedThunkJIT::fpRegT0);
     return jit.finalize(globalData->jitStubs->ctiNativeCall());
-#else
-    UNUSED_PARAM(pool);
-    return globalData->jitStubs->ctiNativeCall();
-#endif
 }
 
 static const double oneConstant = 1.0;
@@ -112,7 +107,6 @@
 
 MacroAssemblerCodePtr powThunkGenerator(JSGlobalData* globalData, ExecutablePool* pool)
 {
-#if USE(JSVALUE64) || USE(JSVALUE32_64)
     SpecializedThunkJIT jit(2, globalData, pool);
     if (!jit.supportsFloatingPoint())
         return globalData->jitStubs->ctiNativeCall();
@@ -161,10 +155,6 @@
         jit.appendFailure(nonIntExponent);
 
     return jit.finalize(globalData->jitStubs->ctiNativeCall());
-#else
-    UNUSED_PARAM(pool);
-    return globalData->jitStubs->ctiNativeCall();
-#endif
 }
 
 }