diff options
Diffstat (limited to 'lldb/source/Core/Scalar.cpp')
| -rw-r--r-- | lldb/source/Core/Scalar.cpp | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/lldb/source/Core/Scalar.cpp b/lldb/source/Core/Scalar.cpp index 24e427c40d2..c32c33c1547 100644 --- a/lldb/source/Core/Scalar.cpp +++ b/lldb/source/Core/Scalar.cpp @@ -1922,6 +1922,74 @@ Scalar::SetValueFromCString (const char *value_str, Encoding encoding, uint32_t } bool +Scalar::SignExtend (uint32_t sign_bit_pos) +{ + const uint32_t max_bit_pos = GetByteSize() * 8; + + if (sign_bit_pos < max_bit_pos) + { + switch (m_type) + { + default: + case Scalar::e_void: + case Scalar::e_float: + case Scalar::e_double: + case Scalar::e_long_double: + return false; + + case Scalar::e_sint: + case Scalar::e_uint: + if (max_bit_pos == sign_bit_pos) + return true; + else if (sign_bit_pos < (max_bit_pos-1)) + { + unsigned int sign_bit = 1u << sign_bit_pos; + if (m_data.uint & sign_bit) + { + const unsigned int mask = ~(sign_bit) + 1u; + m_data.uint |= mask; + } + return true; + } + break; + + case Scalar::e_slong: + case Scalar::e_ulong: + if (max_bit_pos == sign_bit_pos) + return true; + else if (sign_bit_pos < (max_bit_pos-1)) + { + unsigned long sign_bit = 1ul << sign_bit_pos; + if (m_data.uint & sign_bit) + { + const unsigned long mask = ~(sign_bit) + 1ul; + m_data.uint |= mask; + } + return true; + } + break; + + case Scalar::e_slonglong: + case Scalar::e_ulonglong: + if (max_bit_pos == sign_bit_pos) + return true; + else if (sign_bit_pos < (max_bit_pos-1)) + { + unsigned long long sign_bit = 1ull << sign_bit_pos; + if (m_data.uint & sign_bit) + { + const unsigned long long mask = ~(sign_bit) + 1ull; + m_data.uint |= mask; + } + return true; + } + break; + } + } + return false; +} + +bool lldb_private::operator== (const Scalar& lhs, const Scalar& rhs) { // If either entry is void then we can just compare the types |
