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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/x87/codegen-x87.h" | 5 #include "src/x87/codegen-x87.h" |
6 | 6 |
7 #if V8_TARGET_ARCH_X87 | 7 #if V8_TARGET_ARCH_X87 |
8 | 8 |
9 #include "src/codegen.h" | 9 #include "src/codegen.h" |
10 #include "src/heap/heap.h" | 10 #include "src/heap/heap.h" |
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34 #define __ masm. | 34 #define __ masm. |
35 | 35 |
36 | 36 |
37 UnaryMathFunction CreateExpFunction() { | 37 UnaryMathFunction CreateExpFunction() { |
38 // No SSE2 support | 38 // No SSE2 support |
39 return &std::exp; | 39 return &std::exp; |
40 } | 40 } |
41 | 41 |
42 | 42 |
43 UnaryMathFunction CreateSqrtFunction() { | 43 UnaryMathFunction CreateSqrtFunction() { |
44 // No SSE2 support | 44 size_t actual_size; |
45 return &std::sqrt; | 45 // Allocate buffer in executable space. |
| 46 byte* buffer = |
| 47 static_cast<byte*>(base::OS::Allocate(1 * KB, &actual_size, true)); |
| 48 if (buffer == NULL) return &std::sqrt; |
| 49 |
| 50 MacroAssembler masm(NULL, buffer, static_cast<int>(actual_size)); |
| 51 // Load double input into registers. |
| 52 __ fld_d(MemOperand(esp, 4)); |
| 53 __ X87SetFPUCW(0x027F); |
| 54 __ fsqrt(); |
| 55 __ X87SetFPUCW(0x037F); |
| 56 __ Ret(); |
| 57 |
| 58 CodeDesc desc; |
| 59 masm.GetCode(&desc); |
| 60 DCHECK(!RelocInfo::RequiresRelocation(desc)); |
| 61 |
| 62 Assembler::FlushICacheWithoutIsolate(buffer, actual_size); |
| 63 base::OS::ProtectCode(buffer, actual_size); |
| 64 return FUNCTION_CAST<UnaryMathFunction>(buffer); |
46 } | 65 } |
47 | 66 |
48 | 67 |
49 // Helper functions for CreateMemMoveFunction. | 68 // Helper functions for CreateMemMoveFunction. |
50 #undef __ | 69 #undef __ |
51 #define __ ACCESS_MASM(masm) | 70 #define __ ACCESS_MASM(masm) |
52 | 71 |
53 enum Direction { FORWARD, BACKWARD }; | 72 enum Direction { FORWARD, BACKWARD }; |
54 enum Alignment { MOVE_ALIGNED, MOVE_UNALIGNED }; | 73 enum Alignment { MOVE_ALIGNED, MOVE_UNALIGNED }; |
55 | 74 |
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623 CodePatcher patcher(sequence, young_length); | 642 CodePatcher patcher(sequence, young_length); |
624 patcher.masm()->call(stub->instruction_start(), RelocInfo::NONE32); | 643 patcher.masm()->call(stub->instruction_start(), RelocInfo::NONE32); |
625 } | 644 } |
626 } | 645 } |
627 | 646 |
628 | 647 |
629 } // namespace internal | 648 } // namespace internal |
630 } // namespace v8 | 649 } // namespace v8 |
631 | 650 |
632 #endif // V8_TARGET_ARCH_X87 | 651 #endif // V8_TARGET_ARCH_X87 |
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