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Issue 502713003: Encode CEntryStub properties in the minor key. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: encode Created 6 years, 4 months ago
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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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