OpenBLAS/interface/larf.c

/*********************************************************************/
/* Copyright 2009, 2010 The University of Texas at Austin.           */
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/*********************************************************************/

#include <stdio.h>
#include "common.h"
#ifdef FUNCTION_PROFILE
#include "functable.h"
#endif

static int (*larf[])(blas_arg_t *, BLASLONG *, BLASLONG *, FLOAT *, FLOAT *, BLASLONG) = {
  LARF_L, LARF_R,
};

int NAME(char *SIDE, blasint *M, blasint *N, FLOAT *v, blasint *incV, FLOAT *tau, FLOAT *c, blasint *ldC, FLOAT *work){

  blas_arg_t args;

  FLOAT *buffer;
#ifdef PPC440
  extern
#endif
  FLOAT *sa, *sb;

  char side_arg  = *SIDE;
  int side;
  
  PRINT_DEBUG_NAME;

  TOUPPER(side_arg);

  args.m    = *M;
  args.n    = *N;
  args.a    = (void *)v;
  args.lda  = *incV;
  args.c    = (void *)c;
  args.ldc  = *ldC;

  args.alpha = (void *)tau;

  side  = -1;
  if (side_arg  == 'L') side  = 0;
  if (side_arg  == 'R') side  = 1;

  if (args.m == 0 || args.n == 0) return 0;
  
#ifndef COMPLEX
  if (*tau == ZERO) return 0;
#else
  if ((*(tau + 0) == ZERO) && (*(tau + 1) == ZERO)) return 0;
#endif

  IDEBUG_START;

  FUNCTION_PROFILE_START();

#ifndef PPC440
  buffer = (FLOAT *)blas_memory_alloc(1);

  sa = (FLOAT *)((BLASLONG)buffer + GEMM_OFFSET_A);
  sb = (FLOAT *)(((BLASLONG)sa + ((GEMM_P * GEMM_Q * COMPSIZE * SIZE + GEMM_ALIGN) & ~GEMM_ALIGN)) + GEMM_OFFSET_B);
#endif

  larf[side](&args, NULL, NULL, sa, sb, 0);

#ifndef PPC440
  blas_memory_free(buffer);
#endif

  FUNCTION_PROFILE_END(COMPSIZE * COMPSIZE, args.m * args.n,  2. / 3. * args.m * args.n * args.n);

  IDEBUG_END;

  return 0;
}