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score: Move Thread_Control::Registers member

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Place this member placed directly after the end of the common block so that
the structure offsets are as small as possible.  This helps on instruction
set architectures with a very limited range for intermediate values.  For
example, see the __aeabi_read_tp() implementation for ARM Thumb-1.

Update #3835.
This commit is contained in:
Sebastian Huber
2022-10-14 10:46:06 +02:00
parent 2846b17d7e
commit 15bba4aecf
1 changed files with 9 additions and 2 deletions
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11
cpukit/include/rtems/score/thread.h
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@@ -858,6 +858,15 @@ struct _Thread_Control {
#endif
/*================= end of common block =================*/
/**
* @brief This member contains the context of this thread.
*
* This member is placed directly after the end of the common block so that
* the structure offsets are as small as possible. This helps on instruction
* set architectures with a very limited range for intermediate values.
*/
Context_Control Registers;
#if defined(RTEMS_SMP) && defined(RTEMS_PROFILING)
/**
* @brief Potpourri lock statistics.
@@ -913,8 +922,6 @@ struct _Thread_Control {
Thread_Action_control Post_switch_actions;
/** This field contains the context of this thread. */
Context_Control Registers;
#if ( CPU_HARDWARE_FP == TRUE ) || ( CPU_SOFTWARE_FP == TRUE )
/** This field points to the floating point context for this thread.
* If NULL, the thread is integer only.