Remove the special MathFloor / MathAbs call handlers.

src/x64/stub-cache-x64.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1938 matching lines @@
   // it.
   GenerateJumpFunctionIgnoreReceiver(function);
 
   HandlerFrontendFooter(&miss);
 
   // Return the generated code.
   return GetCode(type, name);
 }
 
 
-Handle<Code> CallStubCompiler::CompileMathFloorCall(
-    Handle<Object> object,
-    Handle<JSObject> holder,
-    Handle<Cell> cell,
-    Handle<JSFunction> function,
-    Handle<String> name,
-    Code::StubType type) {
-  const int argc = arguments().immediate();
-  StackArgumentsAccessor args(rsp, argc);
-
-  // If the object is not a JSObject or we got an unexpected number of
-  // arguments, bail out to the regular call.
-  if (!object->IsJSObject() || argc != 1) {
-    return Handle<Code>::null();
-  }
-
-  Label miss, slow;
-
-  HandlerFrontendHeader(object, holder, name, RECEIVER_MAP_CHECK, &miss);
-  if (!cell.is_null()) {
-    ASSERT(cell->value() == *function);
-    GenerateLoadFunctionFromCell(cell, function, &miss);
-  }
-
-  // Load the (only) argument into rax.
-  __ movq(rax, args.GetArgumentOperand(1));
-
-  // Check if the argument is a smi.
-  Label smi;
-  STATIC_ASSERT(kSmiTag == 0);
-  __ JumpIfSmi(rax, &smi);
-
-  // Check if the argument is a heap number and load its value into xmm0.
-  __ CheckMap(rax, factory()->heap_number_map(), &slow, DONT_DO_SMI_CHECK);
-  __ movsd(xmm0, FieldOperand(rax, HeapNumber::kValueOffset));
-
-  // Check if the argument is strictly positive. Note this also discards NaN.
-  __ xorpd(xmm1, xmm1);
-  __ ucomisd(xmm0, xmm1);
-  __ j(below_equal, &slow);
-
-  // Do a truncating conversion.
-  __ cvttsd2si(rax, xmm0);
-
-  // Checks for 0x80000000 which signals a failed conversion.
-  Label conversion_failure;
-  __ cmpl(rax, Immediate(0x80000000));
-  __ j(equal, &conversion_failure);
-
-  // Smi tag and return.
-  __ Integer32ToSmi(rax, rax);
-  __ bind(&smi);
-  __ ret(2 * kPointerSize);
-
-  // Check if the argument is < 2^kMantissaBits.
-  Label already_round;
-  __ bind(&conversion_failure);
-  int64_t kTwoMantissaBits= V8_INT64_C(0x4330000000000000);
-  __ movq(rbx, kTwoMantissaBits);
-  __ movq(xmm1, rbx);
-  __ ucomisd(xmm0, xmm1);
-  __ j(above_equal, &already_round);
-
-  // Save a copy of the argument.
-  __ movaps(xmm2, xmm0);
-
-  // Compute (argument + 2^kMantissaBits) - 2^kMantissaBits.
-  __ addsd(xmm0, xmm1);
-  __ subsd(xmm0, xmm1);
-
-  // Compare the argument and the tentative result to get the right mask:
-  //   if xmm2 < xmm0:
-  //     xmm2 = 1...1
-  //   else:
-  //     xmm2 = 0...0
-  __ cmpltsd(xmm2, xmm0);
-
-  // Subtract 1 if the argument was less than the tentative result.
-  int64_t kOne = V8_INT64_C(0x3ff0000000000000);
-  __ movq(rbx, kOne);
-  __ movq(xmm1, rbx);
-  __ andpd(xmm1, xmm2);
-  __ subsd(xmm0, xmm1);
-
-  // Return a new heap number.
-  __ AllocateHeapNumber(rax, rbx, &slow);
-  __ movsd(FieldOperand(rax, HeapNumber::kValueOffset), xmm0);
-  __ ret(2 * kPointerSize);
-
-  // Return the argument (when it's an already round heap number).
-  __ bind(&already_round);
-  __ movq(rax, args.GetArgumentOperand(1));
-  __ ret(2 * kPointerSize);
-
-  __ bind(&slow);
-  // We do not have to patch the receiver because the function makes no use of
-  // it.
-  GenerateJumpFunctionIgnoreReceiver(function);
-
-  HandlerFrontendFooter(&miss);
-
-  // Return the generated code.
-  return GetCode(type, name);
-}
-
-
-Handle<Code> CallStubCompiler::CompileMathAbsCall(
-    Handle<Object> object,
-    Handle<JSObject> holder,
-    Handle<Cell> cell,
-    Handle<JSFunction> function,
-    Handle<String> name,
-    Code::StubType type) {
-  // If the object is not a JSObject or we got an unexpected number of
-  // arguments, bail out to the regular call.
-  const int argc = arguments().immediate();
-  StackArgumentsAccessor args(rsp, argc);
-  if (!object->IsJSObject() || argc != 1) return Handle<Code>::null();
-
-  Label miss;
-
-  HandlerFrontendHeader(object, holder, name, RECEIVER_MAP_CHECK, &miss);
-  if (!cell.is_null()) {
-    ASSERT(cell->value() == *function);
-    GenerateLoadFunctionFromCell(cell, function, &miss);
-  }
-
-  // Load the (only) argument into rax.
-  __ movq(rax, args.GetArgumentOperand(1));
-
-  // Check if the argument is a smi.
-  Label not_smi;
-  STATIC_ASSERT(kSmiTag == 0);
-  __ JumpIfNotSmi(rax, &not_smi);
-
-  // Branchless abs implementation, refer to below:
-  // http://graphics.stanford.edu/~seander/bithacks.html#IntegerAbs
-  // Set ebx to 1...1 (== -1) if the argument is negative, or to 0...0
-  // otherwise.
-  __ movq(rbx, rax);
-  __ sar(rbx, Immediate(kBitsPerPointer - 1));
-
-  // Do bitwise not or do nothing depending on ebx.
-  __ xor_(rax, rbx);
-
-  // Add 1 or do nothing depending on ebx.
-  __ subq(rax, rbx);
-
-  // If the result is still negative, go to the slow case.
-  // This only happens for the most negative smi.
-  Label slow;
-  __ j(negative, &slow);
-
-  __ ret(2 * kPointerSize);
-
-  // Check if the argument is a heap number and load its value.
-  __ bind(&not_smi);
-  __ CheckMap(rax, factory()->heap_number_map(), &slow, DONT_DO_SMI_CHECK);
-  __ MoveDouble(rbx, FieldOperand(rax, HeapNumber::kValueOffset));
-
-  // Check the sign of the argument. If the argument is positive,
-  // just return it.
-  Label negative_sign;
-  const int sign_mask_shift =
-      (HeapNumber::kExponentOffset - HeapNumber::kValueOffset) * kBitsPerByte;
-  __ Set(rdi, static_cast<int64_t>(HeapNumber::kSignMask) << sign_mask_shift);
-  __ testq(rbx, rdi);
-  __ j(not_zero, &negative_sign);
-  __ ret(2 * kPointerSize);
-
-  // If the argument is negative, clear the sign, and return a new
-  // number. We still have the sign mask in rdi.
-  __ bind(&negative_sign);
-  __ xor_(rbx, rdi);
-  __ AllocateHeapNumber(rax, rdx, &slow);
-  __ MoveDouble(FieldOperand(rax, HeapNumber::kValueOffset), rbx);
-  __ ret(2 * kPointerSize);
-
-  __ bind(&slow);
-  // We do not have to patch the receiver because the function makes no use of
-  // it.
-  GenerateJumpFunctionIgnoreReceiver(function);
-
-  HandlerFrontendFooter(&miss);
-
-  // Return the generated code.
-  return GetCode(type, name);
-}
-
-
 Handle<Code> CallStubCompiler::CompileFastApiCall(
     const CallOptimization& optimization,
     Handle<Object> object,
     Handle<JSObject> holder,
     Handle<Cell> cell,
     Handle<JSFunction> function,
     Handle<String> name) {
   ASSERT(optimization.is_simple_api_call());
   // Bail out if object is a global object as we don't want to
   // repatch it to global receiver.
@@ skipping 586 matching lines @@
   // -----------------------------------
   TailCallBuiltin(masm, Builtins::kKeyedLoadIC_Miss);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64