| //===-- lldb_ARMUtils.h -----------------------------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef lldb_ARMUtils_h_ |
| #define lldb_ARMUtils_h_ |
| |
| // Utility functions for the ARM/Thumb Instruction Set Architecture. |
| |
| namespace lldb_private { |
| |
| // This function performs the check for the register numbers 13 and 15 that are |
| // not permitted for many Thumb register specifiers. |
| static inline bool BadReg(uint32_t n) { return n == 13 || n == 15; } |
| |
| // Returns an integer result equal to the number of bits of x that are ones. |
| static inline uint32_t BitCount(uint32_t x) |
| { |
| // c accumulates the total bits set in x |
| uint32_t c; |
| for (c = 0; x; ++c) |
| { |
| x &= x - 1; // clear the least significant bit set |
| } |
| return c; |
| } |
| |
| } // namespace lldb_private |
| |
| #endif // lldb_ARMUtils_h_ |