OpenBLAS/lapack/lauum/lauum_U_single.c

/*********************************************************************/
/* Copyright 2009, 2010 The University of Texas at Austin.           */
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/* without modification, are permitted provided that the following   */
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/*   2. Redistributions in binary form must reproduce the above      */
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/*    THIS  SOFTWARE IS PROVIDED  BY THE  UNIVERSITY OF  TEXAS AT    */
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/*********************************************************************/

#include <stdio.h>
#include "common.h"

static FLOAT dp1 =  1.;

#ifndef COMPLEX
#define TRMM_KERNEL	TRMM_KERNEL_RT
#define SYRK_KERNEL	SYRK_KERNEL_U
#else
#define TRMM_KERNEL	TRMM_KERNEL_RC
#ifdef XDOUBLE
#define SYRK_KERNEL	xherk_kernel_UN
#elif defined(DOUBLE)
#define SYRK_KERNEL	zherk_kernel_UN
#else
#define SYRK_KERNEL	cherk_kernel_UN
#endif
#endif

#if 0
#undef GEMM_P
#undef GEMM_Q
#undef GEMM_R

#define GEMM_P 8
#define GEMM_Q 20
#define GEMM_R 24
#endif

#define GEMM_PQ  MAX(GEMM_P, GEMM_Q)
#define REAL_GEMM_R (GEMM_R - GEMM_PQ)

blasint CNAME(blas_arg_t *args, BLASLONG *range_m, BLASLONG *range_n, FLOAT *sa, FLOAT *sb, BLASLONG myid) {

  BLASLONG  n, lda;
  FLOAT *a;

  BLASLONG j, bk, blocking;
  BLASLONG is, ls, ks;
  BLASLONG jjs, min_jj;

  BLASLONG min_i, min_l, min_k;
  BLASLONG range_N[2];

  FLOAT *sb2 = (FLOAT *)((((BLASLONG)sb
		    + GEMM_PQ  * GEMM_Q * COMPSIZE * SIZE + GEMM_ALIGN) & ~GEMM_ALIGN)
		  + GEMM_OFFSET_B);

#if 0
  FLOAT *aa;
#endif

  n      = args -> n;
  a      = (FLOAT *)args -> a;
  lda    = args -> lda;
  
  if (range_n) {
    n      = range_n[1] - range_n[0];
    a     += range_n[0] * (lda + 1) * COMPSIZE;
  }

  if (n <= DTB_ENTRIES) {
    LAUU2_U(args, NULL, range_n, sa, sb, 0);
    return 0;
  }

  blocking = GEMM_Q;
  if (n <= 4 * GEMM_Q) blocking = (n + 3) / 4;

  for (j = 0; j < n; j += blocking) {
    bk = n - j;
    if (bk > blocking) bk = blocking;

    if (j > 0) {

      TRMM_OUTCOPY(bk, bk, a + (j + j * lda) * COMPSIZE, lda, 0, 0, sb);

      for (ls = 0; ls < j; ls += REAL_GEMM_R) {
	min_l = j - ls;

#if 0
	
      
	if (min_l > REAL_GEMM_R) min_l = REAL_GEMM_R;
	min_i = ls + min_l;
	if (min_i > GEMM_P) min_i = GEMM_P;
	
	if (ls > 0) {
	  GEMM_ITCOPY(bk, min_i, a + (j * lda) * COMPSIZE, lda, sa);
	  aa = sa;
	} else {
	  aa = sb2;
	}
	
	for (jjs = ls; jjs < ls + min_l; jjs += GEMM_P){
	  min_jj = ls + min_l - jjs;
	  if (min_jj > GEMM_P) min_jj = GEMM_P;
	  
	  GEMM_OTCOPY(bk,  min_jj,  a + (jjs  + j * lda) * COMPSIZE, lda, sb2 + (jjs - ls) * bk * COMPSIZE);
	  
	  SYRK_KERNEL(min_i, min_jj, bk, dp1, 
		      aa, 
		      sb2 + (jjs - ls) * bk * COMPSIZE, 
		      a + (jjs * lda) * COMPSIZE, lda, - jjs);
	}
	
	if (ls + REAL_GEMM_R >= j ) {
	  for (ks = 0; ks < bk; ks += GEMM_P) {
	    min_k = bk - ks;
	    if (min_k > GEMM_P) min_k = GEMM_P;
	    
	    TRMM_KERNEL(min_i, min_k, bk, dp1,
#ifdef COMPLEX
			ZERO,
#endif
			aa,
			sb + ks * bk * COMPSIZE,
			a + ((ks + j) * lda) * COMPSIZE, lda, -ks); 
	  }
	}
	
	for(is = min_i; is < ls + min_l ; is += GEMM_P){
	  min_i = ls + min_l - is;
	  if (min_i > GEMM_P) min_i = GEMM_P;
	  
	  if (is < ls) {
	    GEMM_ITCOPY(bk, min_i, a + (is + j * lda) * COMPSIZE, lda, sa);
	    aa = sa;
	  } else {
	    aa = sb2 + (is - ls) * bk * COMPSIZE;
	  }
	  
	  SYRK_KERNEL(min_i, min_l, bk, dp1, 
		      aa, 
		      sb2, 
		      a + (is + ls * lda) * COMPSIZE, lda, is - ls);
	  
	  if (ls + REAL_GEMM_R >= j ) {
	    for (ks = 0; ks < bk; ks += GEMM_P) {
	      min_k = bk - ks;
	      if (min_k > GEMM_P) min_k = GEMM_P;
	      
	      TRMM_KERNEL(min_i, min_k, bk, dp1,
#ifdef COMPLEX
			  ZERO,
#endif
			  aa,
			  sb + ks * bk * COMPSIZE,
			  a + (is + (ks + j) * lda) * COMPSIZE, lda, -ks); 
	    }
	  }
	}
#else
	if (min_l > REAL_GEMM_R) min_l = REAL_GEMM_R;
	min_i = ls + min_l;
	if (min_i > GEMM_P) min_i = GEMM_P;

	GEMM_ITCOPY(bk, min_i, a + (j * lda) * COMPSIZE, lda, sa);

	for (jjs = ls; jjs < ls + min_l; jjs += GEMM_P){
	  min_jj = ls + min_l - jjs;
	  if (min_jj > GEMM_P) min_jj = GEMM_P;
	  
	  GEMM_OTCOPY(bk,  min_jj,  a + (jjs  + j * lda) * COMPSIZE, lda, sb2 + (jjs - ls) * bk * COMPSIZE);
	  
	  SYRK_KERNEL(min_i, min_jj, bk, dp1, 
		      sa, 
		      sb2 + (jjs - ls) * bk * COMPSIZE, 
		      a + (jjs * lda) * COMPSIZE, lda, - jjs);
	}

	if (ls + REAL_GEMM_R >= j ) {
	  for (ks = 0; ks < bk; ks += GEMM_P) {
	    min_k = bk - ks;
	    if (min_k > GEMM_P) min_k = GEMM_P;
	    
	    TRMM_KERNEL(min_i, min_k, bk, dp1,
#ifdef COMPLEX
			ZERO,
#endif
			sa,
			sb + ks * bk * COMPSIZE,
			a + ((ks + j) * lda) * COMPSIZE, lda, -ks); 
	  }
	}

	for(is = min_i; is < ls + min_l ; is += GEMM_P){
	  min_i = ls + min_l - is;
	  if (min_i > GEMM_P) min_i = GEMM_P;
	  
	  GEMM_ITCOPY(bk, min_i, a + (is + j * lda) * COMPSIZE, lda, sa);
	  
	  SYRK_KERNEL(min_i, min_l, bk, dp1, 
		      sa, 
		      sb2, 
		      a + (is + ls * lda) * COMPSIZE, lda, is - ls);
	  
	  if (ls + REAL_GEMM_R >= j ) {
	    for (ks = 0; ks < bk; ks += GEMM_P) {
	      min_k = bk - ks;
	      if (min_k > GEMM_P) min_k = GEMM_P;
	      
	      TRMM_KERNEL(min_i, min_k, bk, dp1,
#ifdef COMPLEX
			  ZERO,
#endif
			  sa,
			  sb + ks * bk * COMPSIZE,
			  a + (is + (ks + j) * lda) * COMPSIZE, lda, -ks); 
	    }
	  }
	}
#endif
      } /* end of ls */
    }

    if (!range_n) {
      range_N[0] = j;
      range_N[1] = j + bk;
    } else {
      range_N[0] = range_n[0] + j;
      range_N[1] = range_n[0] + j + bk;
    }
    
    CNAME(args, NULL, range_N, sa, sb, 0);

  }

  return 0;
}