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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 #include "vm/globals.h" // Needed here to get TARGET_ARCH_IA32. | 5 #include "vm/globals.h" // Needed here to get TARGET_ARCH_IA32. |
6 #if defined(TARGET_ARCH_IA32) | 6 #if defined(TARGET_ARCH_IA32) |
7 | 7 |
8 #include "vm/intermediate_language.h" | 8 #include "vm/intermediate_language.h" |
9 | 9 |
10 #include "lib/error.h" | 10 #include "lib/error.h" |
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1750 __ SmiUntag(left); | 1750 __ SmiUntag(left); |
1751 __ sarl(left, right); | 1751 __ sarl(left, right); |
1752 __ SmiTag(left); | 1752 __ SmiTag(left); |
1753 break; | 1753 break; |
1754 } | 1754 } |
1755 case Token::kSHL: { | 1755 case Token::kSHL: { |
1756 Register temp = locs()->temp(0).reg(); | 1756 Register temp = locs()->temp(0).reg(); |
1757 Label call_method, done; | 1757 Label call_method, done; |
1758 // Check if count too large for handling it inlined. | 1758 // Check if count too large for handling it inlined. |
1759 __ movl(temp, left); | 1759 __ movl(temp, left); |
1760 __ cmpl(right, | 1760 Range* right_range = this->right()->definition()->range(); |
| 1761 const bool right_needs_check = |
| 1762 (right_range == NULL) || !right_range->IsWithin(0, (Smi::kBits - 1)); |
| 1763 if (right_needs_check) { |
| 1764 __ cmpl(right, |
1761 Immediate(reinterpret_cast<int32_t>(Smi::New(Smi::kBits)))); | 1765 Immediate(reinterpret_cast<int32_t>(Smi::New(Smi::kBits)))); |
1762 __ j(ABOVE_EQUAL, &call_method, Assembler::kNearJump); | 1766 __ j(ABOVE_EQUAL, &call_method, Assembler::kNearJump); |
| 1767 } |
1763 Register right_temp = locs()->temp(1).reg(); | 1768 Register right_temp = locs()->temp(1).reg(); |
1764 ASSERT(right_temp == ECX); // Count must be in ECX | 1769 ASSERT(right_temp == ECX); // Count must be in ECX |
1765 __ movl(right_temp, right); | 1770 __ movl(right_temp, right); |
1766 __ SmiUntag(right_temp); | 1771 __ SmiUntag(right_temp); |
1767 // Overflow test (preserve temp and right); | 1772 // Overflow test (preserve temp and right); |
1768 __ shll(left, right_temp); | 1773 __ shll(left, right_temp); |
1769 __ sarl(left, right_temp); | 1774 __ sarl(left, right_temp); |
1770 __ cmpl(left, temp); | 1775 __ cmpl(left, temp); |
1771 __ j(NOT_EQUAL, &call_method, Assembler::kNearJump); // Overflow. | 1776 __ j(NOT_EQUAL, &call_method, Assembler::kNearJump); // Overflow. |
1772 // Shift for result now we know there is no overflow. | 1777 // Shift for result now we know there is no overflow. |
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2577 __ pcmpeqq(XMM0, XMM0); // Generate all 1's. | 2582 __ pcmpeqq(XMM0, XMM0); // Generate all 1's. |
2578 __ pxor(value, XMM0); | 2583 __ pxor(value, XMM0); |
2579 } | 2584 } |
2580 | 2585 |
2581 | 2586 |
2582 } // namespace dart | 2587 } // namespace dart |
2583 | 2588 |
2584 #undef __ | 2589 #undef __ |
2585 | 2590 |
2586 #endif // defined TARGET_ARCH_X64 | 2591 #endif // defined TARGET_ARCH_X64 |
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