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RTOp_TOp_ele_wise_divide.c
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00001 /*
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00004 // 
00005 // Moocho: Multi-functional Object-Oriented arCHitecture for Optimization
00006 //                  Copyright (2003) Sandia Corporation
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00042 */
00043 
00044 #include "RTOp_TOp_ele_wise_divide.h"
00045 #include "RTOp_obj_null_vtbl.h"
00046 #include "RTOp_obj_value_vtbl.h"
00047 
00048 /* Implementation functions for RTOp_RTOp */
00049 
00050 static int RTOp_TOp_ele_wise_divide_apply_op(
00051   const struct RTOp_RTOp_vtbl_t* vtbl, const void* obj_data
00052   , const int num_vecs, const struct RTOp_SubVector vecs[]
00053   , const int num_targ_vecs, const struct RTOp_MutableSubVector targ_vecs[]
00054   , RTOp_ReductTarget targ_obj )
00055 {
00056   RTOp_value_type        alpha;
00057   RTOp_index_type        sub_dim;
00058   RTOp_value_type        *z_val;
00059   ptrdiff_t              z_val_s;
00060   const RTOp_value_type  *v0_val;
00061   ptrdiff_t              v0_val_s;
00062   const RTOp_value_type  *v1_val;
00063   ptrdiff_t              v1_val_s;
00064   register RTOp_index_type k;
00065 
00066   /* */
00067   /* Validate the input */
00068   /* */
00069   if( num_vecs != 2 || vecs == NULL )
00070     return RTOp_ERR_INVALID_NUM_VECS;
00071   if( num_targ_vecs != 1 || targ_vecs == NULL )
00072     return RTOp_ERR_INVALID_NUM_TARG_VECS;
00073   if( targ_vecs[0].sub_dim != vecs[0].sub_dim
00074     || targ_vecs[0].sub_dim != vecs[1].sub_dim )
00075     return RTOp_ERR_INCOMPATIBLE_VECS;
00076   assert(obj_data);
00077 
00078 
00079   /* */
00080   /* Get pointers to data */
00081   /* */
00082 
00083   /* alpha */
00084   alpha = *(RTOp_value_type*)obj_data;
00085   /* z */
00086   sub_dim       = targ_vecs[0].sub_dim;
00087   z_val         = targ_vecs[0].values;
00088   z_val_s       = targ_vecs[0].values_stride;
00089   /* v0 */
00090   v0_val         = vecs[0].values;
00091   v0_val_s       = vecs[0].values_stride;
00092   /* v1 */
00093   v1_val         = vecs[1].values;
00094   v1_val_s       = vecs[1].values_stride;
00095 
00096   /* */
00097   /* Force in bounds */
00098   /* */
00099 
00100   if( z_val_s == 1 && v0_val_s == 1 && v1_val_s == 1 ) {
00101     /* Slightly faster loop for unit stride vectors */
00102     for( k = 0; k < sub_dim; ++k )
00103       *z_val++ = alpha*(*v0_val++)/(*v1_val++);
00104   }
00105   else {
00106     /* More general implementation for non-unit strides */
00107     for( k = 0; k < sub_dim; ++k, z_val+=z_val_s, v0_val+=v0_val_s, v1_val+=v1_val_s )
00108       *z_val = alpha*(*v0_val)/(*v1_val);
00109   }
00110 
00111   return 0; /* success? */
00112 }
00113 
00114 /* Virtual function table */
00115 const struct RTOp_RTOp_vtbl_t RTOp_TOp_ele_wise_divide_vtbl =
00116 {
00117   &RTOp_obj_value_vtbl /* alpha */
00118   ,&RTOp_obj_null_vtbl /* use null type for target object */
00119   ,"TOp_ele_wise_divide"
00120   ,NULL /* use default from reduct_vtbl */
00121   ,RTOp_TOp_ele_wise_divide_apply_op
00122   ,NULL
00123   ,NULL
00124 };
00125 
00126 /* Class specific functions */
00127 
00128 int RTOp_TOp_ele_wise_divide_construct( RTOp_value_type alpha, struct RTOp_RTOp* op )
00129 {
00130 #ifdef RTOp_DEBUG
00131   assert(op);
00132 #endif
00133   op->obj_data  = NULL;
00134   op->vtbl      = &RTOp_TOp_ele_wise_divide_vtbl;
00135   op->vtbl->obj_data_vtbl->obj_create(NULL,NULL,&op->obj_data);
00136   return RTOp_TOp_ele_wise_divide_set_alpha(alpha,op);
00137 }
00138 
00139 int RTOp_TOp_ele_wise_divide_set_alpha( RTOp_value_type alpha, struct RTOp_RTOp* op )
00140 {
00141 #ifdef RTOp_DEBUG
00142   assert(op);
00143   assert(op->obj_data);
00144 #endif
00145   *(RTOp_value_type*)op->obj_data = alpha;
00146   return 0;
00147 }
00148 
00149 int RTOp_TOp_ele_wise_divide_destroy( struct RTOp_RTOp* op )
00150 {
00151   op->obj_data  = NULL;
00152   op->vtbl      = NULL;
00153   return 0; /* success? */
00154 }
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