diff options
Diffstat (limited to 'gdbsupport/common-utils.h')
| -rw-r--r-- | gdbsupport/common-utils.h | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/gdbsupport/common-utils.h b/gdbsupport/common-utils.h index 114342d..10bf9f4 100644 --- a/gdbsupport/common-utils.h +++ b/gdbsupport/common-utils.h @@ -1,6 +1,6 @@ /* Shared general utility routines for GDB, the GNU debugger. - Copyright (C) 1986-2024 Free Software Foundation, Inc. + Copyright (C) 1986-2025 Free Software Foundation, Inc. This file is part of GDB. @@ -196,6 +196,16 @@ in_inclusive_range (T value, T low, T high) extern ULONGEST align_up (ULONGEST v, int n); extern ULONGEST align_down (ULONGEST v, int n); +/* Sign-extend the value V, using N as the number of valid bits. That + is, bit N-1 is the sign bit. The higher-order bits (those outside + 0..N-1) must be zero. */ +static inline ULONGEST +sign_extend (ULONGEST v, int n) +{ + ULONGEST mask = (ULONGEST) 1 << (n - 1); + return (v ^ mask) - mask; +} + /* Convert hex digit A to a number, or throw an exception. */ extern int fromhex (int a); |