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1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 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 // A Disassembler object is used to disassemble a block of code instruction by | 5 // A Disassembler object is used to disassemble a block of code instruction by |
6 // instruction. The default implementation of the NameConverter object can be | 6 // instruction. The default implementation of the NameConverter object can be |
7 // overriden to modify register names or to do symbol lookup on addresses. | 7 // overriden to modify register names or to do symbol lookup on addresses. |
8 // | 8 // |
9 // The example below will disassemble a block of code and print it to stdout. | 9 // The example below will disassemble a block of code and print it to stdout. |
10 // | 10 // |
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1892 out_buffer_pos_ += SNPrintF(out_buffer_ + out_buffer_pos_, | 1892 out_buffer_pos_ += SNPrintF(out_buffer_ + out_buffer_pos_, |
1893 "vmul.i%d q%d, q%d, q%d", size, Vd, Vn, Vm); | 1893 "vmul.i%d q%d, q%d, q%d", size, Vd, Vn, Vm); |
1894 } else if (instr->Bits(21, 20) == 0 && instr->Bits(11, 8) == 0xe && | 1894 } else if (instr->Bits(21, 20) == 0 && instr->Bits(11, 8) == 0xe && |
1895 instr->Bit(4) == 0) { | 1895 instr->Bit(4) == 0) { |
1896 int Vd = instr->VFPDRegValue(kSimd128Precision); | 1896 int Vd = instr->VFPDRegValue(kSimd128Precision); |
1897 int Vm = instr->VFPMRegValue(kSimd128Precision); | 1897 int Vm = instr->VFPMRegValue(kSimd128Precision); |
1898 int Vn = instr->VFPNRegValue(kSimd128Precision); | 1898 int Vn = instr->VFPNRegValue(kSimd128Precision); |
1899 // vceq.f32 Qd, Qm, Qn. | 1899 // vceq.f32 Qd, Qm, Qn. |
1900 out_buffer_pos_ += SNPrintF(out_buffer_ + out_buffer_pos_, | 1900 out_buffer_pos_ += SNPrintF(out_buffer_ + out_buffer_pos_, |
1901 "vceq.f32 q%d, q%d, q%d", Vd, Vn, Vm); | 1901 "vceq.f32 q%d, q%d, q%d", Vd, Vn, Vm); |
| 1902 } else if (instr->Bits(11, 8) == 0x3) { |
| 1903 int size = kBitsPerByte * (1 << instr->Bits(21, 20)); |
| 1904 int Vd = instr->VFPDRegValue(kSimd128Precision); |
| 1905 int Vm = instr->VFPMRegValue(kSimd128Precision); |
| 1906 int Vn = instr->VFPNRegValue(kSimd128Precision); |
| 1907 const char* op = (instr->Bit(4) == 1) ? "vcge" : "vcgt"; |
| 1908 // vcge/vcgt.s<size> Qd, Qm, Qn. |
| 1909 out_buffer_pos_ += |
| 1910 SNPrintF(out_buffer_ + out_buffer_pos_, "%s.s%d q%d, q%d, q%d", op, |
| 1911 size, Vd, Vn, Vm); |
1902 } else if (instr->Bit(20) == 0 && instr->Bits(11, 8) == 0xf && | 1912 } else if (instr->Bit(20) == 0 && instr->Bits(11, 8) == 0xf && |
1903 instr->Bit(6) == 1 && instr->Bit(4) == 1) { | 1913 instr->Bit(6) == 1 && instr->Bit(4) == 1) { |
1904 int Vd = instr->VFPDRegValue(kSimd128Precision); | 1914 int Vd = instr->VFPDRegValue(kSimd128Precision); |
1905 int Vm = instr->VFPMRegValue(kSimd128Precision); | 1915 int Vm = instr->VFPMRegValue(kSimd128Precision); |
1906 int Vn = instr->VFPNRegValue(kSimd128Precision); | 1916 int Vn = instr->VFPNRegValue(kSimd128Precision); |
1907 const char* op = instr->Bit(21) == 0 ? "vrecps" : "vrsqrts"; | 1917 const char* op = instr->Bit(21) == 0 ? "vrecps" : "vrsqrts"; |
1908 // vrecps/vrsqrts.f32 Qd, Qm, Qn. | 1918 // vrecps/vrsqrts.f32 Qd, Qm, Qn. |
1909 out_buffer_pos_ += SNPrintF(out_buffer_ + out_buffer_pos_, | 1919 out_buffer_pos_ += SNPrintF(out_buffer_ + out_buffer_pos_, |
1910 "%s.f32 q%d, q%d, q%d", op, Vd, Vn, Vm); | 1920 "%s.f32 q%d, q%d, q%d", op, Vd, Vn, Vm); |
1911 } else { | 1921 } else { |
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1976 "veor q%d, q%d, q%d", Vd, Vn, Vm); | 1986 "veor q%d, q%d, q%d", Vd, Vn, Vm); |
1977 } | 1987 } |
1978 } else if (instr->Bit(21) == 0 && instr->Bits(11, 8) == 0xd && | 1988 } else if (instr->Bit(21) == 0 && instr->Bits(11, 8) == 0xd && |
1979 instr->Bit(6) == 1 && instr->Bit(4) == 1) { | 1989 instr->Bit(6) == 1 && instr->Bit(4) == 1) { |
1980 // vmul.f32 Qd, Qn, Qm | 1990 // vmul.f32 Qd, Qn, Qm |
1981 int Vd = instr->VFPDRegValue(kSimd128Precision); | 1991 int Vd = instr->VFPDRegValue(kSimd128Precision); |
1982 int Vn = instr->VFPNRegValue(kSimd128Precision); | 1992 int Vn = instr->VFPNRegValue(kSimd128Precision); |
1983 int Vm = instr->VFPMRegValue(kSimd128Precision); | 1993 int Vm = instr->VFPMRegValue(kSimd128Precision); |
1984 out_buffer_pos_ += SNPrintF(out_buffer_ + out_buffer_pos_, | 1994 out_buffer_pos_ += SNPrintF(out_buffer_ + out_buffer_pos_, |
1985 "vmul.f32 q%d, q%d, q%d", Vd, Vn, Vm); | 1995 "vmul.f32 q%d, q%d, q%d", Vd, Vn, Vm); |
| 1996 } else if (instr->Bit(20) == 0 && instr->Bits(11, 8) == 0xe && |
| 1997 instr->Bit(4) == 0) { |
| 1998 int Vd = instr->VFPDRegValue(kSimd128Precision); |
| 1999 int Vm = instr->VFPMRegValue(kSimd128Precision); |
| 2000 int Vn = instr->VFPNRegValue(kSimd128Precision); |
| 2001 const char* op = (instr->Bit(21) == 0) ? "vcge" : "vcgt"; |
| 2002 // vcge/vcgt.f32 Qd, Qm, Qn. |
| 2003 out_buffer_pos_ += SNPrintF(out_buffer_ + out_buffer_pos_, |
| 2004 "%s.f32 q%d, q%d, q%d", op, Vd, Vn, Vm); |
| 2005 } else if (instr->Bits(11, 8) == 0x3) { |
| 2006 int size = kBitsPerByte * (1 << instr->Bits(21, 20)); |
| 2007 int Vd = instr->VFPDRegValue(kSimd128Precision); |
| 2008 int Vm = instr->VFPMRegValue(kSimd128Precision); |
| 2009 int Vn = instr->VFPNRegValue(kSimd128Precision); |
| 2010 const char* op = (instr->Bit(4) == 1) ? "vcge" : "vcgt"; |
| 2011 // vcge/vcgt.u<size> Qd, Qm, Qn. |
| 2012 out_buffer_pos_ += |
| 2013 SNPrintF(out_buffer_ + out_buffer_pos_, "%s.u%d q%d, q%d, q%d", op, |
| 2014 size, Vd, Vn, Vm); |
1986 } else { | 2015 } else { |
1987 Unknown(instr); | 2016 Unknown(instr); |
1988 } | 2017 } |
1989 break; | 2018 break; |
1990 case 7: | 2019 case 7: |
1991 if ((instr->Bits(18, 16) == 0) && (instr->Bits(11, 6) == 0x28) && | 2020 if ((instr->Bits(18, 16) == 0) && (instr->Bits(11, 6) == 0x28) && |
1992 (instr->Bit(4) == 1)) { | 2021 (instr->Bit(4) == 1)) { |
1993 // vmovl unsigned | 2022 // vmovl unsigned |
1994 if ((instr->VdValue() & 1) != 0) Unknown(instr); | 2023 if ((instr->VdValue() & 1) != 0) Unknown(instr); |
1995 int Vd = (instr->Bit(22) << 3) | (instr->VdValue() >> 1); | 2024 int Vd = (instr->Bit(22) << 3) | (instr->VdValue() >> 1); |
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2438 pc += d.InstructionDecode(buffer, pc); | 2467 pc += d.InstructionDecode(buffer, pc); |
2439 v8::internal::PrintF(f, "%p %08x %s\n", static_cast<void*>(prev_pc), | 2468 v8::internal::PrintF(f, "%p %08x %s\n", static_cast<void*>(prev_pc), |
2440 *reinterpret_cast<int32_t*>(prev_pc), buffer.start()); | 2469 *reinterpret_cast<int32_t*>(prev_pc), buffer.start()); |
2441 } | 2470 } |
2442 } | 2471 } |
2443 | 2472 |
2444 | 2473 |
2445 } // namespace disasm | 2474 } // namespace disasm |
2446 | 2475 |
2447 #endif // V8_TARGET_ARCH_ARM | 2476 #endif // V8_TARGET_ARCH_ARM |
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