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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_MIPS64 | 7 #if V8_TARGET_ARCH_MIPS64 |
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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1473 // NOTE: s0-s2 hold the arguments of this function instead of a0-a2. | 1473 // NOTE: s0-s2 hold the arguments of this function instead of a0-a2. |
1474 // The reason for this is that these arguments would need to be saved anyway | 1474 // The reason for this is that these arguments would need to be saved anyway |
1475 // so it's faster to set them up directly. | 1475 // so it's faster to set them up directly. |
1476 // See MacroAssembler::PrepareCEntryArgs and PrepareCEntryFunction. | 1476 // See MacroAssembler::PrepareCEntryArgs and PrepareCEntryFunction. |
1477 | 1477 |
1478 // Compute the argv pointer in a callee-saved register. | 1478 // Compute the argv pointer in a callee-saved register. |
1479 __ Daddu(s1, sp, s1); | 1479 __ Daddu(s1, sp, s1); |
1480 | 1480 |
1481 // Enter the exit frame that transitions from JavaScript to C++. | 1481 // Enter the exit frame that transitions from JavaScript to C++. |
1482 FrameScope scope(masm, StackFrame::MANUAL); | 1482 FrameScope scope(masm, StackFrame::MANUAL); |
1483 __ EnterExitFrame(save_doubles_); | 1483 __ EnterExitFrame(save_doubles()); |
1484 | 1484 |
1485 // s0: number of arguments including receiver (C callee-saved) | 1485 // s0: number of arguments including receiver (C callee-saved) |
1486 // s1: pointer to first argument (C callee-saved) | 1486 // s1: pointer to first argument (C callee-saved) |
1487 // s2: pointer to builtin function (C callee-saved) | 1487 // s2: pointer to builtin function (C callee-saved) |
1488 | 1488 |
1489 // Prepare arguments for C routine. | 1489 // Prepare arguments for C routine. |
1490 // a0 = argc | 1490 // a0 = argc |
1491 __ mov(a0, s0); | 1491 __ mov(a0, s0); |
1492 // a1 = argv (set in the delay slot after find_ra below). | 1492 // a1 = argv (set in the delay slot after find_ra below). |
1493 | 1493 |
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1560 __ Branch(&okay, eq, a4, Operand(a2)); | 1560 __ Branch(&okay, eq, a4, Operand(a2)); |
1561 __ stop("Unexpected pending exception"); | 1561 __ stop("Unexpected pending exception"); |
1562 __ bind(&okay); | 1562 __ bind(&okay); |
1563 } | 1563 } |
1564 | 1564 |
1565 // Exit C frame and return. | 1565 // Exit C frame and return. |
1566 // v0:v1: result | 1566 // v0:v1: result |
1567 // sp: stack pointer | 1567 // sp: stack pointer |
1568 // fp: frame pointer | 1568 // fp: frame pointer |
1569 // s0: still holds argc (callee-saved). | 1569 // s0: still holds argc (callee-saved). |
1570 __ LeaveExitFrame(save_doubles_, s0, true, EMIT_RETURN); | 1570 __ LeaveExitFrame(save_doubles(), s0, true, EMIT_RETURN); |
1571 | 1571 |
1572 // Handling of exception. | 1572 // Handling of exception. |
1573 __ bind(&exception_returned); | 1573 __ bind(&exception_returned); |
1574 | 1574 |
1575 // Retrieve the pending exception. | 1575 // Retrieve the pending exception. |
1576 __ li(a2, Operand(pending_exception_address)); | 1576 __ li(a2, Operand(pending_exception_address)); |
1577 __ ld(v0, MemOperand(a2)); | 1577 __ ld(v0, MemOperand(a2)); |
1578 | 1578 |
1579 // Clear the pending exception. | 1579 // Clear the pending exception. |
1580 __ li(a3, Operand(isolate()->factory()->the_hole_value())); | 1580 __ li(a3, Operand(isolate()->factory()->the_hole_value())); |
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5323 MemOperand(fp, 6 * kPointerSize), | 5323 MemOperand(fp, 6 * kPointerSize), |
5324 NULL); | 5324 NULL); |
5325 } | 5325 } |
5326 | 5326 |
5327 | 5327 |
5328 #undef __ | 5328 #undef __ |
5329 | 5329 |
5330 } } // namespace v8::internal | 5330 } } // namespace v8::internal |
5331 | 5331 |
5332 #endif // V8_TARGET_ARCH_MIPS64 | 5332 #endif // V8_TARGET_ARCH_MIPS64 |
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