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| 1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 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 "src/v8.h" | 5 #include "src/v8.h" |
| 6 | 6 |
| 7 #if V8_TARGET_ARCH_MIPS | 7 #if V8_TARGET_ARCH_MIPS |
| 8 | 8 |
| 9 #include "src/bootstrapper.h" | 9 #include "src/bootstrapper.h" |
| 10 #include "src/code-stubs.h" | 10 #include "src/code-stubs.h" |
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| 400 Register result1_; | 400 Register result1_; |
| 401 Register result2_; | 401 Register result2_; |
| 402 Register source_; | 402 Register source_; |
| 403 Register zeros_; | 403 Register zeros_; |
| 404 | 404 |
| 405 // Minor key encoding in 16 bits. | 405 // Minor key encoding in 16 bits. |
| 406 class ModeBits: public BitField<OverwriteMode, 0, 2> {}; | 406 class ModeBits: public BitField<OverwriteMode, 0, 2> {}; |
| 407 class OpBits: public BitField<Token::Value, 2, 14> {}; | 407 class OpBits: public BitField<Token::Value, 2, 14> {}; |
| 408 | 408 |
| 409 Major MajorKey() const { return ConvertToDouble; } | 409 Major MajorKey() const { return ConvertToDouble; } |
| 410 int MinorKey() const { | 410 uint32_t MinorKey() const { |
| 411 // Encode the parameters in a unique 16 bit value. | 411 // Encode the parameters in a unique 16 bit value. |
| 412 return result1_.code() + | 412 return result1_.code() + |
| 413 (result2_.code() << 4) + | 413 (result2_.code() << 4) + |
| 414 (source_.code() << 8) + | 414 (source_.code() << 8) + |
| 415 (zeros_.code() << 12); | 415 (zeros_.code() << 12); |
| 416 } | 416 } |
| 417 | 417 |
| 418 void Generate(MacroAssembler* masm); | 418 void Generate(MacroAssembler* masm); |
| 419 }; | 419 }; |
| 420 | 420 |
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| 1479 // NOTE: s0-s2 hold the arguments of this function instead of a0-a2. | 1479 // NOTE: s0-s2 hold the arguments of this function instead of a0-a2. |
| 1480 // The reason for this is that these arguments would need to be saved anyway | 1480 // The reason for this is that these arguments would need to be saved anyway |
| 1481 // so it's faster to set them up directly. | 1481 // so it's faster to set them up directly. |
| 1482 // See MacroAssembler::PrepareCEntryArgs and PrepareCEntryFunction. | 1482 // See MacroAssembler::PrepareCEntryArgs and PrepareCEntryFunction. |
| 1483 | 1483 |
| 1484 // Compute the argv pointer in a callee-saved register. | 1484 // Compute the argv pointer in a callee-saved register. |
| 1485 __ Addu(s1, sp, s1); | 1485 __ Addu(s1, sp, s1); |
| 1486 | 1486 |
| 1487 // Enter the exit frame that transitions from JavaScript to C++. | 1487 // Enter the exit frame that transitions from JavaScript to C++. |
| 1488 FrameScope scope(masm, StackFrame::MANUAL); | 1488 FrameScope scope(masm, StackFrame::MANUAL); |
| 1489 __ EnterExitFrame(save_doubles_); | 1489 __ EnterExitFrame(save_doubles()); |
| 1490 | 1490 |
| 1491 // s0: number of arguments including receiver (C callee-saved) | 1491 // s0: number of arguments including receiver (C callee-saved) |
| 1492 // s1: pointer to first argument (C callee-saved) | 1492 // s1: pointer to first argument (C callee-saved) |
| 1493 // s2: pointer to builtin function (C callee-saved) | 1493 // s2: pointer to builtin function (C callee-saved) |
| 1494 | 1494 |
| 1495 // Prepare arguments for C routine. | 1495 // Prepare arguments for C routine. |
| 1496 // a0 = argc | 1496 // a0 = argc |
| 1497 __ mov(a0, s0); | 1497 __ mov(a0, s0); |
| 1498 // a1 = argv (set in the delay slot after find_ra below). | 1498 // a1 = argv (set in the delay slot after find_ra below). |
| 1499 | 1499 |
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| 1567 __ Branch(&okay, eq, t0, Operand(a2)); | 1567 __ Branch(&okay, eq, t0, Operand(a2)); |
| 1568 __ stop("Unexpected pending exception"); | 1568 __ stop("Unexpected pending exception"); |
| 1569 __ bind(&okay); | 1569 __ bind(&okay); |
| 1570 } | 1570 } |
| 1571 | 1571 |
| 1572 // Exit C frame and return. | 1572 // Exit C frame and return. |
| 1573 // v0:v1: result | 1573 // v0:v1: result |
| 1574 // sp: stack pointer | 1574 // sp: stack pointer |
| 1575 // fp: frame pointer | 1575 // fp: frame pointer |
| 1576 // s0: still holds argc (callee-saved). | 1576 // s0: still holds argc (callee-saved). |
| 1577 __ LeaveExitFrame(save_doubles_, s0, true, EMIT_RETURN); | 1577 __ LeaveExitFrame(save_doubles(), s0, true, EMIT_RETURN); |
| 1578 | 1578 |
| 1579 // Handling of exception. | 1579 // Handling of exception. |
| 1580 __ bind(&exception_returned); | 1580 __ bind(&exception_returned); |
| 1581 | 1581 |
| 1582 // Retrieve the pending exception. | 1582 // Retrieve the pending exception. |
| 1583 __ li(a2, Operand(pending_exception_address)); | 1583 __ li(a2, Operand(pending_exception_address)); |
| 1584 __ lw(v0, MemOperand(a2)); | 1584 __ lw(v0, MemOperand(a2)); |
| 1585 | 1585 |
| 1586 // Clear the pending exception. | 1586 // Clear the pending exception. |
| 1587 __ li(a3, Operand(isolate()->factory()->the_hole_value())); | 1587 __ li(a3, Operand(isolate()->factory()->the_hole_value())); |
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| 5286 MemOperand(fp, 6 * kPointerSize), | 5286 MemOperand(fp, 6 * kPointerSize), |
| 5287 NULL); | 5287 NULL); |
| 5288 } | 5288 } |
| 5289 | 5289 |
| 5290 | 5290 |
| 5291 #undef __ | 5291 #undef __ |
| 5292 | 5292 |
| 5293 } } // namespace v8::internal | 5293 } } // namespace v8::internal |
| 5294 | 5294 |
| 5295 #endif // V8_TARGET_ARCH_MIPS | 5295 #endif // V8_TARGET_ARCH_MIPS |
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