parallel and threadscope grades.
We had been using types with the wrong signedness well calling atomic operations.
GCC 4.x also picked up an error where #elif was used instead of #else.
While testing these changes on a 32bit system more bugs where found on the i386
architecture and on AMD brand processors.
runtime/mercury_atomic_ops.h:
runtime/mercury_atomic_ops.c:
Add unsigned variants of the following atomic operations:
increment,
add,
add_and_fetch,
dec_and_is_zero,
Add a signed variant for compare and swap.
Rename the MR_atomic_dec_<type>_and_is_zero operation to move the type to
the end of the name.
Use volatile storage in the MR_Stats structure.
A 32bit machine cannot do atomic operations on 64bit values and MR_Stats
must use 64bit values. Therefore 64bit values in the MR_Stats structure
are now protected by a lock on 32bit machines.
runtime/mercury_atomic_ops.h:
Fix a typeo in the i386 version of MR_atomic_dec_and_is_zero_uint().
runtime/mercury_atomic_ops.c:
AMD CPUs do not conform to Intel's specification for being able to
extract the CPU clock speed from the brand string. When we cannot
determine the CPU's clock speed then we write out threadscope
timestamps in raw clock cycles rather than nanoseconds.
On i386 machines the ebx register is used to implement PIC code,
however the CPUID instruction uses it to output information. Save
this register on C's stack while we issue CPUID and retrieve the
result in ebx.
We now pass native machine sized values to the inline assembler code
that implements RDTSC and RDTSCP.
Fix commenting style in some places.
runtime/mercury_atomic_ops.c:
Fix some incorrect C preprocessor code for conditional compilation.
runtime/mercury_grade.h:
Increment binary compatibility number. This should have been done in a
prior change when the MR_runnext macro changed which broke binary
compatibility in the parallel low-level C grades.
runtime/mercury_context.h:
In MR_SyncTerm_Struct use an unsigned value for the number of conjuncts
remaining before the conjunction is complete.
runtime/mercury_threadscope.c:
Record raw cpu clock ticks rather than milliseconds when we don't
know the processor's clock speed.
runtime/mercury_context.c:
runtime/mercury_wsdeque.h:
runtime/mercury_wsdeque.c:
Conform to changes in mercury_atomic_ops.h
edc230406e