diff options
Diffstat (limited to 'deps/v8/src/arm/disasm-arm.cc')
| -rw-r--r-- | deps/v8/src/arm/disasm-arm.cc | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/deps/v8/src/arm/disasm-arm.cc b/deps/v8/src/arm/disasm-arm.cc index 5b314557d..127c16086 100644 --- a/deps/v8/src/arm/disasm-arm.cc +++ b/deps/v8/src/arm/disasm-arm.cc @@ -429,12 +429,22 @@ int Decoder::FormatOption(Instr* instr, const char* format) { return 3; } case 'o': { - if (format[3] == '1') { + if ((format[3] == '1') && (format[4] == '2')) { // 'off12: 12-bit offset for load and store instructions ASSERT(STRING_STARTS_WITH(format, "off12")); out_buffer_pos_ += v8i::OS::SNPrintF(out_buffer_ + out_buffer_pos_, "%d", instr->Offset12Field()); return 5; + } else if ((format[3] == '1') && (format[4] == '6')) { + ASSERT(STRING_STARTS_WITH(format, "off16to20")); + out_buffer_pos_ += v8i::OS::SNPrintF(out_buffer_ + out_buffer_pos_, + "%d", instr->Bits(20, 16) +1); + return 9; + } else if (format[3] == '7') { + ASSERT(STRING_STARTS_WITH(format, "off7to11")); + out_buffer_pos_ += v8i::OS::SNPrintF(out_buffer_ + out_buffer_pos_, + "%d", instr->ShiftAmountField()); + return 8; } // 'off8: 8-bit offset for extra load and store instructions ASSERT(STRING_STARTS_WITH(format, "off8")); @@ -795,7 +805,18 @@ void Decoder::DecodeType3(Instr* instr) { break; } case 3: { - Format(instr, "'memop'cond'b 'rd, ['rn, +'shift_rm]'w"); + if (instr->HasW() && (instr->Bits(6, 4) == 0x5)) { + uint32_t widthminus1 = static_cast<uint32_t>(instr->Bits(20, 16)); + uint32_t lsbit = static_cast<uint32_t>(instr->ShiftAmountField()); + uint32_t msbit = widthminus1 + lsbit; + if (msbit <= 31) { + Format(instr, "ubfx'cond 'rd, 'rm, #'off7to11, #'off16to20"); + } else { + UNREACHABLE(); + } + } else { + Format(instr, "'memop'cond'b 'rd, ['rn, +'shift_rm]'w"); + } break; } default: { |