pstrmr2.c File Reference

#include "redist.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <ctype.h>

Go to the source code of this file.

Data Structures
struct	MDESC
struct	IDESC

Macros
#define	static2   static
#define	fortran_mr2d   pstrmr2do
#define	fortran_mr2dnew   pstrmr2d
#define	scopy_   scopy
#define	slacpy_   slacpy
#define	Clacpy   Cstrlacpy
#define	BLOCK_CYCLIC_2D   1
#define	SHIFT(row, sprow, nbrow)
#define	max(A, B)
#define	min(A, B)
#define	DIVUP(a, b)
#define	ROUNDUP(a, b)
#define	scanD0   strscanD0
#define	dispmat   strdispmat
#define	setmemory   strsetmemory
#define	freememory   strfreememory
#define	scan_intervals   strscan_intervals
#define	SENDBUFF   0
#define	RECVBUFF   1
#define	SIZEBUFF   2
#define	NDEBUG

Functions
void	Cblacs_pcoord ()
Int	Cblacs_pnum ()
void	Csetpvmtids ()
void	Cblacs_get ()
void	Cblacs_pinfo ()
void	Cblacs_gridinfo ()
void	Cblacs_gridinit ()
void	Cblacs_exit ()
void	Cblacs_gridexit ()
void	Cblacs_setup ()
void	Cigebs2d ()
void	Cigebr2d ()
void	Cigesd2d ()
void	Cigerv2d ()
void	Cigsum2d ()
void	Cigamn2d ()
void	Cigamx2d ()
void	Csgesd2d ()
void	Csgerv2d ()
Int	localindice ()
void *	mr2d_malloc ()
Int	ppcm ()
Int	localsize ()
Int	memoryblocksize ()
Int	changeorigin ()
void	paramcheck ()
void	Cpstrmr2do ()
void	Cpstrmr2d ()
void	setmemory (float **adpointer, Int blocksize)
void	freememory (float *ptrtobefreed)
static2 Int	insidemat (char *uplo, char *diag, Int i, Int j, Int m, Int n, Int *offset)
static2 void	intersect (char *uplo, char *diag, Int j, Int start, Int end, Int action, Int *ptrsizebuff, float **pptrbuff, float *ptrblock, Int m, Int n, MDESC *ma, Int ia, Int ja, Int templateheight0, Int templatewidth0, MDESC *mb, Int ib, Int jb, Int templateheight1, Int templatewidth1)
Int	scan_intervals (char type, Int ja, Int jb, Int n, MDESC *ma, MDESC *mb, Int q0, Int q1, Int col0, Int col1, IDESC *result)
void	scanD0 (char *uplo, char *diag, Int action, ptrbuff, Int *ptrsizebuff, Int m, Int n, MDESC *ma, Int ia, Int ja, Int p0, Int q0, MDESC *mb, Int ib, Int jb, Int p1, Int q1, IDESC *v_inter, Int vinter_nb, IDESC *h_inter, Int hinter_nb, float *ptrbuff *ptrblock)

Macro Definition Documentation

BLOCK_CYCLIC_2D

#define BLOCK_CYCLIC_2D   1

Definition at line 36 of file pstrmr2.c.

Clacpy

#define Clacpy   Cstrlacpy

Definition at line 23 of file pstrmr2.c.

dispmat

#define dispmat   strdispmat

Definition at line 83 of file pstrmr2.c.

DIVUP

#define DIVUP	(		a,
			b )

Value:

( ((a)-1) /(b)+1)

Definition at line 44 of file pstrmr2.c.

fortran_mr2d

#define fortran_mr2d   pstrmr2do

Definition at line 18 of file pstrmr2.c.

fortran_mr2dnew

#define fortran_mr2dnew   pstrmr2d

Definition at line 19 of file pstrmr2.c.

freememory

#define freememory   strfreememory

Definition at line 85 of file pstrmr2.c.

max

#define max	(		A,
			B )

Value:

((A)>(B)?(A):(B))

Definition at line 42 of file pstrmr2.c.

min

#define min	(		A,
			B )

Value:

((A)>(B)?(B):(A))

Definition at line 43 of file pstrmr2.c.

NDEBUG

#define NDEBUG

Definition at line 102 of file pstrmr2.c.

RECVBUFF

#define RECVBUFF   1

Definition at line 96 of file pstrmr2.c.

ROUNDUP

#define ROUNDUP	(		a,
			b )

Value:

(DIVUP(a,b)*(b))

Definition at line 45 of file pstrmr2.c.

scan_intervals

#define scan_intervals   strscan_intervals

Definition at line 86 of file pstrmr2.c.

scanD0

#define scanD0   strscanD0

Definition at line 82 of file pstrmr2.c.

scopy_

#define scopy_   scopy

Definition at line 20 of file pstrmr2.c.

SENDBUFF

#define SENDBUFF   0

Definition at line 95 of file pstrmr2.c.

setmemory

#define setmemory   strsetmemory

Definition at line 84 of file pstrmr2.c.

SHIFT

#define SHIFT	(		row,
			sprow,
			nbrow )

Value:

((row)-(sprow)+ ((row) >= (sprow) ? 0 : (nbrow)))

Definition at line 41 of file pstrmr2.c.

SIZEBUFF

#define SIZEBUFF   2

Definition at line 97 of file pstrmr2.c.

slacpy_

#define slacpy_   slacpy

Definition at line 21 of file pstrmr2.c.

static2

#define static2   static

Definition at line 8 of file pstrmr2.c.

Function Documentation

Cblacs_exit()

void Cblacs_exit ( )

extern

Cblacs_get()

void Cblacs_get ( )

extern

Cblacs_gridexit()

void Cblacs_gridexit ( )

extern

Cblacs_gridinfo()

void Cblacs_gridinfo ( )

extern

Cblacs_gridinit()

void Cblacs_gridinit ( )

extern

Cblacs_pcoord()

void Cblacs_pcoord ( )

extern

Cblacs_pinfo()

void Cblacs_pinfo ( )

extern

Cblacs_pnum()

Int Cblacs_pnum ( )

extern

Cblacs_setup()

void Cblacs_setup ( )

extern

changeorigin()

Int changeorigin ( )

extern

Cigamn2d()

void Cigamn2d ( )

extern

Cigamx2d()

void Cigamx2d ( )

extern

Cigebr2d()

void Cigebr2d ( )

extern

Cigebs2d()

void Cigebs2d ( )

extern

Cigerv2d()

void Cigerv2d ( )

extern

Cigesd2d()

void Cigesd2d ( )

extern

Cigsum2d()

void Cigsum2d ( )

extern

Cpstrmr2d()

void Cpstrmr2d ( )

extern

Cpstrmr2do()

void Cpstrmr2do ( )

extern

Csetpvmtids()

void Csetpvmtids ( )

extern

Csgerv2d()

void Csgerv2d ( )

extern

Csgesd2d()

void Csgesd2d ( )

extern

freememory()

void freememory

(

float *

ptrtobefreed

)

Definition at line 126 of file pstrmr2.c.

{
  if (ptrtobefreed == NULL)
    return;
  free((char *) ptrtobefreed);
}

insidemat()

static2 Int insidemat	(	char *	uplo,
		char *	diag,
		Int	i,
		Int	j,
		Int	m,
		Int	n,
		Int *	offset )

Definition at line 138 of file pstrmr2.c.

{
  /* tests outside mxn */
  assert(j >= 0 && j < n);
  assert(i >= 0);
  if (toupper(*uplo) == 'U') {
    Int   nbline;    /* number of lines in the j_th column */
    Int   virtualnbline; /* number of line if we were not limited by m */
    *offset = 0;
    virtualnbline = max(m - n, 0) + j + (toupper(*diag) == 'N');
    nbline = min(virtualnbline, m);
    return nbline - i;
  } else {
    Int   firstline; /* first line in the j_th column */
    Int   diagcol;   /* column where the diag begin */
    Int   virtualline;   /* virtual first line if the matrix was extended with
             * negative indices */
    Int   off;
    diagcol = max(n - m, 0);;
    virtualline = j - diagcol + (toupper(*diag) == 'U');
    firstline = max(0, virtualline);
    off = max(firstline - i, 0);
    *offset = off;
    i += off;
    return m - i;
  }
}/* insidemat() */

intersect()

static2 void intersect	(	char *	uplo,
		char *	diag,
		Int	j,
		Int	start,
		Int	end,
		Int	action,
		Int *	ptrsizebuff,
		float **	pptrbuff,
		float *	ptrblock,
		Int	m,
		Int	n,
		MDESC *	ma,
		Int	ia,
		Int	ja,
		Int	templateheight0,
		Int	templatewidth0,
		MDESC *	mb,
		Int	ib,
		Int	jb,
		Int	templateheight1,
		Int	templatewidth1 )

Definition at line 173 of file pstrmr2.c.

{
  /* int       un = 1; only when we use dcopy instead of memcpy */
  float *ptrstart;
  Int   offset, nbline;
  Int   intervalsize;
  assert(start < end);
  assert(j >= 0 && j < n);
  nbline =
    insidemat(uplo, diag, start, j, m, n, &offset);
  if (nbline <= 0)
    return;
  start += offset;
  if (start >= end)
    return;
  intervalsize = min(end - start, nbline);
  (*ptrsizebuff) += intervalsize;
  switch (action) {
  case SENDBUFF:    /* fill buff with local elements to be sent */
    ptrstart = ptrblock + localindice(start + ia, j + ja,
                      templateheight0, templatewidth0, ma);
    memcpy((char *) (*pptrbuff), (char *) ptrstart,
       intervalsize * sizeof(float));
    /* scopy_(&intervalsize, (char *) (ptrstart), &un, (char *) (*pptrbuff),
     * &un); */
    (*pptrbuff) += intervalsize;
    break;
  case RECVBUFF:    /* fill local memory with the values received */
    ptrstart = ptrblock + localindice(start + ib, j + jb,
                      templateheight1, templatewidth1, mb);
    memcpy((char *) ptrstart, (char *) (*pptrbuff),
       intervalsize * sizeof(float));
    /* scopy_(&intervalsize, (char *) (*pptrbuff), &un, (char *) (ptrstart),
     * &un); */
    (*pptrbuff) += intervalsize;
    break;
  case SIZEBUFF:    /* computation of sizebuff */
    break;
  default:
    printf("action is  %d outside the scope of the case [0..2] !! \n ", action);
    exit(0);
    break;
  };    /* switch (action) */
}/* intersect() */

localindice()

Int localindice ( )

extern

localsize()

Int localsize ( )

extern

memoryblocksize()

Int memoryblocksize ( )

extern

mr2d_malloc()

void * mr2d_malloc ( )

extern

paramcheck()

void paramcheck ( )

extern

ppcm()

Int ppcm ( )

extern

scan_intervals()

Int scan_intervals	(	char	type,
		Int	ja,
		Int	jb,
		Int	n,
		MDESC *	ma,
		MDESC *	mb,
		Int	q0,
		Int	q1,
		Int	col0,
		Int	col1,
		IDESC *	result )

Definition at line 240 of file pstrmr2.c.

{
  Int   offset, j0, j1, templatewidth0, templatewidth1, nbcol0, nbcol1;
  Int   l;   /* local indice on the beginning of the interval */
  assert(type == 'c' || type == 'r');
  nbcol0 = (type == 'c' ? ma->nbcol : ma->nbrow);
  nbcol1 = (type == 'c' ? mb->nbcol : mb->nbrow);
  templatewidth0 = q0 * nbcol0;
  templatewidth1 = q1 * nbcol1;
  {
    Int   sp0 = (type == 'c' ? ma->spcol : ma->sprow);
    Int   sp1 = (type == 'c' ? mb->spcol : mb->sprow);
    j0 = SHIFT(col0, sp0, q0) * nbcol0 - ja;
    j1 = SHIFT(col1, sp1, q1) * nbcol1 - jb;
  }
  offset = 0;
  l = 0;
  /* a small check to verify that the submatrix begin inside the first block
   * of the original matrix, this done by a sort of coordinate change at the
   * beginning of the Cpstrmr2d */
  assert(j0 + nbcol0 > 0);
  assert(j1 + nbcol1 > 0);
  while ((j0 < n) && (j1 < n)) {
    Int   end0, end1;
    Int   start, end;
    end0 = j0 + nbcol0;
    end1 = j1 + nbcol1;
    if (end0 <= j1) {
      j0 += templatewidth0;
      l += nbcol0;
      continue;
    }
    if (end1 <= j0) {
      j1 += templatewidth1;
      continue;
    }
    /* compute the raw intersection */
    start = max(j0, j1);
    start = max(start, 0);
    /* the start is correct now, update the corresponding fields */
    result[offset].gstart = start;
    end = min(end0, end1);
    if (end0 == end) {
      j0 += templatewidth0;
      l += nbcol0;
    }
    if (end1 == end)
      j1 += templatewidth1;
    /* throw the limit if they go out of the matrix */
    end = min(end, n);
    assert(end > start);
    /* it is a bit tricky to see why the length is always positive after all
     * this min and max, first we have the property that every interval
     * considered is at least partly into the submatrix, second we arrive
     * here only if the raw intersection is non-void, if we remove a limit
     * that means the corresponding frontier is in both intervals which
     * proove the final interval is non-void, clear ?? */
    result[offset].len = end - start;
    offset += 1;
  } /* while */
  return offset;
}

scanD0()

void scanD0	(	char *	uplo,
		char *	diag,
		Int	action,
		ptrbuff	,
		Int *	ptrsizebuff,
		Int	m,
		Int	n,
		MDESC *	ma,
		Int	ia,
		Int	ja,
		Int	p0,
		Int	q0,
		MDESC *	mb,
		Int	ib,
		Int	jb,
		Int	p1,
		Int	q1,
		IDESC *	v_inter,
		Int	vinter_nb,
		IDESC *	h_inter,
		Int	hinter_nb,
		float *ptrbuff *	ptrblock )

Definition at line 310 of file pstrmr2.c.

{/* Rmk: the a+au type addresses are strict bounds as a+au does not belong to
  * the [a..a+au-1] interval of length au */
  Int   templateheight1, templatewidth1;
  Int   templateheight0, templatewidth0;
  Int   h, v;    /* for scanning the intervals */
  /* initializations */
  templateheight1 = p1 * mb->nbrow;
  templateheight0 = p0 * ma->nbrow;
  templatewidth1 = q1 * mb->nbcol;
  templatewidth0 = q0 * ma->nbcol;
  /* we now will deal will logical grids, that's to say we change our
   * numbering of processors so that (0,0) begin on logical processor (0,0) */
  /* in case we will not enter the while loop */
  (*ptrsizebuff) = 0;
  for (h = 0; h < hinter_nb; h++)
    for (v = 0; v < vinter_nb; v++) {
      Int   j;
      for (j = 0; j < h_inter[h].len; j++)
    intersect(uplo, diag, j + h_inter[h].gstart,
          v_inter[v].gstart, v_inter[v].gstart + v_inter[v].len,
          action, ptrsizebuff, &ptrbuff, ptrblock, m, n,
          ma, ia, ja, templateheight0, templatewidth0,
          mb, ib, jb, templateheight1, templatewidth1);
    }
}/* scanD0() */

setmemory()

void setmemory	(	float **	adpointer,
		Int	blocksize )

Definition at line 113 of file pstrmr2.c.

{
  assert(blocksize >= 0);
  if (blocksize == 0) {
    *adpointer = NULL;
    return;
  }
  *adpointer = (float *) mr2d_malloc(
                     blocksize * sizeof(float));
}