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1 // Copyright 2014 the V8 project authors. All rights reserved. | 1 // Copyright 2014 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include <assert.h> // For assert | 5 #include <assert.h> // For assert |
6 #include <limits.h> // For LONG_MIN, LONG_MAX. | 6 #include <limits.h> // For LONG_MIN, LONG_MAX. |
7 | 7 |
8 #if V8_TARGET_ARCH_S390 | 8 #if V8_TARGET_ARCH_S390 |
9 | 9 |
10 #include "src/base/bits.h" | 10 #include "src/base/bits.h" |
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1959 LoadP(result, FieldMemOperand(map, Map::kConstructorOrBackPointerOffset)); | 1959 LoadP(result, FieldMemOperand(map, Map::kConstructorOrBackPointerOffset)); |
1960 bind(&loop); | 1960 bind(&loop); |
1961 JumpIfSmi(result, &done); | 1961 JumpIfSmi(result, &done); |
1962 CompareObjectType(result, temp, temp2, MAP_TYPE); | 1962 CompareObjectType(result, temp, temp2, MAP_TYPE); |
1963 bne(&done); | 1963 bne(&done); |
1964 LoadP(result, FieldMemOperand(result, Map::kConstructorOrBackPointerOffset)); | 1964 LoadP(result, FieldMemOperand(result, Map::kConstructorOrBackPointerOffset)); |
1965 b(&loop); | 1965 b(&loop); |
1966 bind(&done); | 1966 bind(&done); |
1967 } | 1967 } |
1968 | 1968 |
1969 void MacroAssembler::TryGetFunctionPrototype(Register function, Register result, | |
1970 Register scratch, Label* miss) { | |
1971 // Get the prototype or initial map from the function. | |
1972 LoadP(result, | |
1973 FieldMemOperand(function, JSFunction::kPrototypeOrInitialMapOffset)); | |
1974 | |
1975 // If the prototype or initial map is the hole, don't return it and | |
1976 // simply miss the cache instead. This will allow us to allocate a | |
1977 // prototype object on-demand in the runtime system. | |
1978 CompareRoot(result, Heap::kTheHoleValueRootIndex); | |
1979 beq(miss); | |
1980 | |
1981 // If the function does not have an initial map, we're done. | |
1982 Label done; | |
1983 CompareObjectType(result, scratch, scratch, MAP_TYPE); | |
1984 bne(&done, Label::kNear); | |
1985 | |
1986 // Get the prototype from the initial map. | |
1987 LoadP(result, FieldMemOperand(result, Map::kPrototypeOffset)); | |
1988 | |
1989 // All done. | |
1990 bind(&done); | |
1991 } | |
1992 | |
1993 void MacroAssembler::CallStub(CodeStub* stub, TypeFeedbackId ast_id, | 1969 void MacroAssembler::CallStub(CodeStub* stub, TypeFeedbackId ast_id, |
1994 Condition cond) { | 1970 Condition cond) { |
1995 DCHECK(AllowThisStubCall(stub)); // Stub calls are not allowed in some stubs. | 1971 DCHECK(AllowThisStubCall(stub)); // Stub calls are not allowed in some stubs. |
1996 Call(stub->GetCode(), RelocInfo::CODE_TARGET, ast_id, cond); | 1972 Call(stub->GetCode(), RelocInfo::CODE_TARGET, ast_id, cond); |
1997 } | 1973 } |
1998 | 1974 |
1999 void MacroAssembler::TailCallStub(CodeStub* stub, Condition cond) { | 1975 void MacroAssembler::TailCallStub(CodeStub* stub, Condition cond) { |
2000 Jump(stub->GetCode(), RelocInfo::CODE_TARGET, cond); | 1976 Jump(stub->GetCode(), RelocInfo::CODE_TARGET, cond); |
2001 } | 1977 } |
2002 | 1978 |
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5352 } | 5328 } |
5353 if (mag.shift > 0) ShiftRightArith(result, result, Operand(mag.shift)); | 5329 if (mag.shift > 0) ShiftRightArith(result, result, Operand(mag.shift)); |
5354 ExtractBit(r0, dividend, 31); | 5330 ExtractBit(r0, dividend, 31); |
5355 AddP(result, r0); | 5331 AddP(result, r0); |
5356 } | 5332 } |
5357 | 5333 |
5358 } // namespace internal | 5334 } // namespace internal |
5359 } // namespace v8 | 5335 } // namespace v8 |
5360 | 5336 |
5361 #endif // V8_TARGET_ARCH_S390 | 5337 #endif // V8_TARGET_ARCH_S390 |
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