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Full Discussion: C multiplication with GCC
Top Forums Programming C multiplication with GCC Post 302544925 by Corona688 on Friday 5th of August 2011 11:22:53 AM
Old 08-05-2011
Quote:
Originally Posted by pheonix
Thanx for reply, however maybe title a little misleading? I am trying to write "C"
code, usable by different processors.
Not all processors have imul.

If you insist on an exact sequence of instructions for it to follow, inline asm is the way to go.
 

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Cpuset Helpers(3)					     Hardware Locality (hwloc)						 Cpuset Helpers(3)

NAME
Cpuset Helpers - Functions static inline hwloc_const_cpuset_t hwloc_topology_get_complete_cpuset (hwloc_topology_t topology) " static inline hwloc_const_cpuset_t hwloc_topology_get_topology_cpuset (hwloc_topology_t topology) " static inline hwloc_const_cpuset_t hwloc_topology_get_online_cpuset (hwloc_topology_t topology) " static inline hwloc_const_cpuset_t hwloc_topology_get_allowed_cpuset (hwloc_topology_t topology) " Function Documentation static inline hwloc_const_cpuset_t hwloc_topology_get_allowed_cpuset (hwloc_topology_ttopology) [static] Get allowed CPU set. Returns: the CPU set of allowed logical processors of the system. If the topology is the result of a combination of several systems, NULL is returned. Note: The returned cpuset is not newly allocated and should thus not be changed or freed, hwloc_cpuset_dup must be used to obtain a local copy. static inline hwloc_const_cpuset_t hwloc_topology_get_complete_cpuset (hwloc_topology_ttopology) [static] Get complete CPU set. Returns: the complete CPU set of logical processors of the system. If the topology is the result of a combination of several systems, NULL is returned. Note: The returned cpuset is not newly allocated and should thus not be changed or freed; hwloc_cpuset_dup must be used to obtain a local copy. static inline hwloc_const_cpuset_t hwloc_topology_get_online_cpuset (hwloc_topology_ttopology) [static] Get online CPU set. Returns: the CPU set of online logical processors of the system. If the topology is the result of a combination of several systems, NULL is returned. Note: The returned cpuset is not newly allocated and should thus not be changed or freed; hwloc_cpuset_dup must be used to obtain a local copy. static inline hwloc_const_cpuset_t hwloc_topology_get_topology_cpuset (hwloc_topology_ttopology) [static] Get topology CPU set. Returns: the CPU set of logical processors of the system for which hwloc provides topology information. This is equivalent to the cpuset of the system object. If the topology is the result of a combination of several systems, NULL is returned. Note: The returned cpuset is not newly allocated and should thus not be changed or freed; hwloc_cpuset_dup must be used to obtain a local copy. Author Generated automatically by Doxygen for Hardware Locality (hwloc) from the source code. Version 1.4.1 Mon Feb 27 2012 Cpuset Helpers(3)
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