tahoma2d/thirdparty/openblas/xianyi-OpenBLAS-e6e87a2/kernel/generic/ztrmm_utcopy_8.c
2016-03-24 02:47:04 +09:00

880 lines
18 KiB
C

/*********************************************************************/
/* Copyright 2009, 2010 The University of Texas at Austin. */
/* All rights reserved. */
/* */
/* Redistribution and use in source and binary forms, with or */
/* without modification, are permitted provided that the following */
/* conditions are met: */
/* */
/* 1. Redistributions of source code must retain the above */
/* copyright notice, this list of conditions and the following */
/* disclaimer. */
/* */
/* 2. Redistributions in binary form must reproduce the above */
/* copyright notice, this list of conditions and the following */
/* disclaimer in the documentation and/or other materials */
/* provided with the distribution. */
/* */
/* THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY OF TEXAS AT */
/* AUSTIN ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, */
/* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF */
/* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE */
/* DISCLAIMED. IN NO EVENT SHALL THE UNIVERSITY OF TEXAS AT */
/* AUSTIN OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, */
/* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES */
/* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE */
/* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR */
/* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF */
/* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT */
/* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT */
/* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE */
/* POSSIBILITY OF SUCH DAMAGE. */
/* */
/* The views and conclusions contained in the software and */
/* documentation are those of the authors and should not be */
/* interpreted as representing official policies, either expressed */
/* or implied, of The University of Texas at Austin. */
/*********************************************************************/
#include <stdio.h>
#include "common.h"
int CNAME(BLASLONG m, BLASLONG n, FLOAT *a, BLASLONG lda, BLASLONG posX, BLASLONG posY, FLOAT *b){
BLASLONG i, js, ii;
BLASLONG X;
FLOAT *a01, *a02, *a03 ,*a04, *a05, *a06, *a07, *a08;
lda *= 2;
js = (n >> 3);
if (js > 0){
do {
X = posX;
if (posX <= posY) {
a01 = a + posX * 2 + (posY + 0) * lda;
a02 = a + posX * 2 + (posY + 1) * lda;
a03 = a + posX * 2 + (posY + 2) * lda;
a04 = a + posX * 2 + (posY + 3) * lda;
a05 = a + posX * 2 + (posY + 4) * lda;
a06 = a + posX * 2 + (posY + 5) * lda;
a07 = a + posX * 2 + (posY + 6) * lda;
a08 = a + posX * 2 + (posY + 7) * lda;
} else {
a01 = a + posY * 2 + (posX + 0) * lda;
a02 = a + posY * 2 + (posX + 1) * lda;
a03 = a + posY * 2 + (posX + 2) * lda;
a04 = a + posY * 2 + (posX + 3) * lda;
a05 = a + posY * 2 + (posX + 4) * lda;
a06 = a + posY * 2 + (posX + 5) * lda;
a07 = a + posY * 2 + (posX + 6) * lda;
a08 = a + posY * 2 + (posX + 7) * lda;
}
i = (m >> 3);
if (i > 0) {
do {
if (X < posY) {
a01 += 16;
a02 += 16;
a03 += 16;
a04 += 16;
a05 += 16;
a06 += 16;
a07 += 16;
a08 += 16;
b += 128;
} else
if (X > posY) {
for (ii = 0; ii < 8; ii++){
b[ 0] = *(a01 + 0);
b[ 1] = *(a01 + 1);
b[ 2] = *(a01 + 2);
b[ 3] = *(a01 + 3);
b[ 4] = *(a01 + 4);
b[ 5] = *(a01 + 5);
b[ 6] = *(a01 + 6);
b[ 7] = *(a01 + 7);
b[ 8] = *(a01 + 8);
b[ 9] = *(a01 + 9);
b[ 10] = *(a01 + 10);
b[ 11] = *(a01 + 11);
b[ 12] = *(a01 + 12);
b[ 13] = *(a01 + 13);
b[ 14] = *(a01 + 14);
b[ 15] = *(a01 + 15);
a01 += lda;
b += 16;
}
a02 += 8 * lda;
a03 += 8 * lda;
a04 += 8 * lda;
a05 += 8 * lda;
a06 += 8 * lda;
a07 += 8 * lda;
a08 += 8 * lda;
} else {
#ifdef UNIT
b[ 0] = ONE;
b[ 1] = ZERO;
#else
b[ 0] = *(a01 + 0);
b[ 1] = *(a01 + 1);
#endif
b[ 2] = ZERO;
b[ 3] = ZERO;
b[ 4] = ZERO;
b[ 5] = ZERO;
b[ 6] = ZERO;
b[ 7] = ZERO;
b[ 8] = ZERO;
b[ 9] = ZERO;
b[ 10] = ZERO;
b[ 11] = ZERO;
b[ 12] = ZERO;
b[ 13] = ZERO;
b[ 14] = ZERO;
b[ 15] = ZERO;
b[ 16] = *(a02 + 0);
b[ 17] = *(a02 + 1);
#ifdef UNIT
b[ 18] = ONE;
b[ 19] = ZERO;
#else
b[ 18] = *(a02 + 2);
b[ 19] = *(a02 + 3);
#endif
b[ 20] = ZERO;
b[ 21] = ZERO;
b[ 22] = ZERO;
b[ 23] = ZERO;
b[ 24] = ZERO;
b[ 25] = ZERO;
b[ 26] = ZERO;
b[ 27] = ZERO;
b[ 28] = ZERO;
b[ 29] = ZERO;
b[ 30] = ZERO;
b[ 31] = ZERO;
b[ 32] = *(a03 + 0);
b[ 33] = *(a03 + 1);
b[ 34] = *(a03 + 2);
b[ 35] = *(a03 + 3);
#ifdef UNIT
b[ 36] = ONE;
b[ 37] = ZERO;
#else
b[ 36] = *(a03 + 4);
b[ 37] = *(a03 + 5);
#endif
b[ 38] = ZERO;
b[ 39] = ZERO;
b[ 40] = ZERO;
b[ 41] = ZERO;
b[ 42] = ZERO;
b[ 43] = ZERO;
b[ 44] = ZERO;
b[ 45] = ZERO;
b[ 46] = ZERO;
b[ 47] = ZERO;
b[ 48] = *(a04 + 0);
b[ 49] = *(a04 + 1);
b[ 50] = *(a04 + 2);
b[ 51] = *(a04 + 3);
b[ 52] = *(a04 + 4);
b[ 53] = *(a04 + 5);
#ifdef UNIT
b[ 54] = ONE;
b[ 55] = ZERO;
#else
b[ 54] = *(a04 + 6);
b[ 55] = *(a04 + 7);
#endif
b[ 56] = ZERO;
b[ 57] = ZERO;
b[ 58] = ZERO;
b[ 59] = ZERO;
b[ 60] = ZERO;
b[ 61] = ZERO;
b[ 62] = ZERO;
b[ 63] = ZERO;
b[ 64] = *(a05 + 0);
b[ 65] = *(a05 + 1);
b[ 66] = *(a05 + 2);
b[ 67] = *(a05 + 3);
b[ 68] = *(a05 + 4);
b[ 69] = *(a05 + 5);
b[ 70] = *(a05 + 6);
b[ 71] = *(a05 + 7);
#ifdef UNIT
b[ 72] = ONE;
b[ 73] = ZERO;
#else
b[ 72] = *(a05 + 8);
b[ 73] = *(a05 + 9);
#endif
b[ 74] = ZERO;
b[ 75] = ZERO;
b[ 76] = ZERO;
b[ 77] = ZERO;
b[ 78] = ZERO;
b[ 79] = ZERO;
b[ 80] = *(a06 + 0);
b[ 81] = *(a06 + 1);
b[ 82] = *(a06 + 2);
b[ 83] = *(a06 + 3);
b[ 84] = *(a06 + 4);
b[ 85] = *(a06 + 5);
b[ 86] = *(a06 + 6);
b[ 87] = *(a06 + 7);
b[ 88] = *(a06 + 8);
b[ 89] = *(a06 + 9);
#ifdef UNIT
b[ 90] = ONE;
b[ 91] = ZERO;
#else
b[ 90] = *(a06 + 10);
b[ 91] = *(a06 + 11);
#endif
b[ 92] = ZERO;
b[ 93] = ZERO;
b[ 94] = ZERO;
b[ 95] = ZERO;
b[ 96] = *(a07 + 0);
b[ 97] = *(a07 + 1);
b[ 98] = *(a07 + 2);
b[ 99] = *(a07 + 3);
b[100] = *(a07 + 4);
b[101] = *(a07 + 5);
b[102] = *(a07 + 6);
b[103] = *(a07 + 7);
b[104] = *(a07 + 8);
b[105] = *(a07 + 9);
b[106] = *(a07 + 10);
b[107] = *(a07 + 11);
#ifdef UNIT
b[108] = ONE;
b[109] = ZERO;
#else
b[108] = *(a07 + 12);
b[109] = *(a07 + 13);
#endif
b[110] = ZERO;
b[111] = ZERO;
b[112] = *(a08 + 0);
b[113] = *(a08 + 1);
b[114] = *(a08 + 2);
b[115] = *(a08 + 3);
b[116] = *(a08 + 4);
b[117] = *(a08 + 5);
b[118] = *(a08 + 6);
b[119] = *(a08 + 7);
b[120] = *(a08 + 8);
b[121] = *(a08 + 9);
b[122] = *(a08 + 10);
b[123] = *(a08 + 11);
b[124] = *(a08 + 12);
b[125] = *(a08 + 13);
#ifdef UNIT
b[126] = ONE;
b[127] = ZERO;
#else
b[126] = *(a08 + 14);
b[127] = *(a08 + 15);
#endif
a01 += 8 * lda;
a02 += 8 * lda;
a03 += 8 * lda;
a04 += 8 * lda;
a05 += 8 * lda;
a06 += 8 * lda;
a07 += 8 * lda;
a08 += 8 * lda;
b += 128;
}
X += 8;
i --;
} while (i > 0);
}
i = (m & 7);
if (i) {
if (X < posY) {
a01 += 2 * i;
a02 += 2 * i;
a03 += 2 * i;
a04 += 2 * i;
a05 += 2 * i;
a06 += 2 * i;
a07 += 2 * i;
a08 += 2 * i;
b += 16 * i;
} else
if (X > posY) {
for (ii = 0; ii < i; ii++){
b[ 0] = *(a01 + 0);
b[ 1] = *(a01 + 1);
b[ 2] = *(a01 + 2);
b[ 3] = *(a01 + 3);
b[ 4] = *(a01 + 4);
b[ 5] = *(a01 + 5);
b[ 6] = *(a01 + 6);
b[ 7] = *(a01 + 7);
b[ 8] = *(a01 + 8);
b[ 9] = *(a01 + 9);
b[ 10] = *(a01 + 10);
b[ 11] = *(a01 + 11);
b[ 12] = *(a01 + 12);
b[ 13] = *(a01 + 13);
b[ 14] = *(a01 + 14);
b[ 15] = *(a01 + 15);
a01 += lda;
a02 += lda;
a03 += lda;
a04 += lda;
a05 += lda;
a06 += lda;
a07 += lda;
a08 += lda;
b += 16;
}
} else {
#ifdef UNIT
b[ 0] = ONE;
b[ 1] = ZERO;
#else
b[ 0] = *(a01 + 0);
b[ 1] = *(a01 + 1);
#endif
b[ 2] = ZERO;
b[ 3] = ZERO;
b[ 4] = ZERO;
b[ 5] = ZERO;
b[ 6] = ZERO;
b[ 7] = ZERO;
b[ 8] = ZERO;
b[ 9] = ZERO;
b[10] = ZERO;
b[11] = ZERO;
b[12] = ZERO;
b[13] = ZERO;
b[14] = ZERO;
b[15] = ZERO;
b += 16;
if(i >= 2) {
b[ 0] = *(a02 + 0);
b[ 1] = *(a02 + 1);
#ifdef UNIT
b[ 2] = ONE;
b[ 3] = ZERO;
#else
b[ 2] = *(a02 + 2);
b[ 3] = *(a02 + 3);
#endif
b[ 4] = ZERO;
b[ 5] = ZERO;
b[ 6] = ZERO;
b[ 7] = ZERO;
b[ 8] = ZERO;
b[ 9] = ZERO;
b[10] = ZERO;
b[11] = ZERO;
b[12] = ZERO;
b[13] = ZERO;
b[14] = ZERO;
b[15] = ZERO;
b += 16;
}
if (i >= 3) {
b[ 0] = *(a03 + 0);
b[ 1] = *(a03 + 1);
b[ 2] = *(a03 + 2);
b[ 3] = *(a03 + 3);
#ifdef UNIT
b[ 4] = ONE;
b[ 5] = ZERO;
#else
b[ 4] = *(a03 + 4);
b[ 5] = *(a03 + 5);
#endif
b[ 6] = ZERO;
b[ 7] = ZERO;
b[ 8] = ZERO;
b[ 9] = ZERO;
b[10] = ZERO;
b[11] = ZERO;
b[12] = ZERO;
b[13] = ZERO;
b[14] = ZERO;
b[15] = ZERO;
b += 16;
}
if (i >= 4) {
b[ 0] = *(a04 + 0);
b[ 1] = *(a04 + 1);
b[ 2] = *(a04 + 2);
b[ 3] = *(a04 + 3);
b[ 4] = *(a04 + 4);
b[ 5] = *(a04 + 5);
#ifdef UNIT
b[ 6] = ONE;
b[ 7] = ZERO;
#else
b[ 6] = *(a04 + 6);
b[ 7] = *(a04 + 7);
#endif
b[ 8] = ZERO;
b[ 9] = ZERO;
b[10] = ZERO;
b[11] = ZERO;
b[12] = ZERO;
b[13] = ZERO;
b[14] = ZERO;
b[15] = ZERO;
b += 16;
}
if (i >= 5) {
b[ 0] = *(a05 + 0);
b[ 1] = *(a05 + 1);
b[ 2] = *(a05 + 2);
b[ 3] = *(a05 + 3);
b[ 4] = *(a05 + 4);
b[ 5] = *(a05 + 5);
b[ 6] = *(a05 + 6);
b[ 7] = *(a05 + 7);
#ifdef UNIT
b[ 8] = ONE;
b[ 9] = ZERO;
#else
b[ 8] = *(a05 + 8);
b[ 9] = *(a05 + 9);
#endif
b[10] = ZERO;
b[11] = ZERO;
b[12] = ZERO;
b[13] = ZERO;
b[14] = ZERO;
b[15] = ZERO;
b += 16;
}
if (i >= 6) {
b[ 0] = *(a06 + 0);
b[ 1] = *(a06 + 1);
b[ 2] = *(a06 + 2);
b[ 3] = *(a06 + 3);
b[ 4] = *(a06 + 4);
b[ 5] = *(a06 + 5);
b[ 6] = *(a06 + 6);
b[ 7] = *(a06 + 7);
b[ 8] = *(a06 + 8);
b[ 9] = *(a06 + 9);
#ifdef UNIT
b[10] = ONE;
b[11] = ZERO;
#else
b[10] = *(a06 + 10);
b[11] = *(a06 + 11);
#endif
b[12] = ZERO;
b[13] = ZERO;
b[14] = ZERO;
b[15] = ZERO;
b += 16;
}
if (i >= 7) {
b[ 0] = *(a07 + 0);
b[ 1] = *(a07 + 1);
b[ 2] = *(a07 + 2);
b[ 3] = *(a07 + 3);
b[ 4] = *(a07 + 4);
b[ 5] = *(a07 + 5);
b[ 6] = *(a07 + 6);
b[ 7] = *(a07 + 7);
b[ 8] = *(a07 + 8);
b[ 9] = *(a07 + 9);
b[10] = *(a07 + 10);
b[11] = *(a07 + 11);
#ifdef UNIT
b[12] = ONE;
b[13] = ZERO;
#else
b[12] = *(a07 + 12);
b[13] = *(a07 + 13);
#endif
b[14] = ZERO;
b[15] = ZERO;
b += 16;
}
}
}
posY += 8;
js --;
} while (js > 0);
} /* End of main loop */
if (n & 4){
X = posX;
if (posX <= posY) {
a01 = a + posX * 2 + (posY + 0) * lda;
a02 = a + posX * 2 + (posY + 1) * lda;
a03 = a + posX * 2 + (posY + 2) * lda;
a04 = a + posX * 2 + (posY + 3) * lda;
} else {
a01 = a + posY * 2 + (posX + 0) * lda;
a02 = a + posY * 2 + (posX + 1) * lda;
a03 = a + posY * 2 + (posX + 2) * lda;
a04 = a + posY * 2 + (posX + 3) * lda;
}
i = (m >> 2);
if (i > 0) {
do {
if (X < posY) {
a01 += 8;
a02 += 8;
a03 += 8;
a04 += 8;
b += 32;
} else
if (X > posY) {
for (ii = 0; ii < 4; ii++){
b[ 0] = *(a01 + 0);
b[ 1] = *(a01 + 1);
b[ 2] = *(a01 + 2);
b[ 3] = *(a01 + 3);
b[ 4] = *(a01 + 4);
b[ 5] = *(a01 + 5);
b[ 6] = *(a01 + 6);
b[ 7] = *(a01 + 7);
a01 += lda;
b += 8;
}
a02 += 4 * lda;
a03 += 4 * lda;
a04 += 4 * lda;
} else {
#ifdef UNIT
b[ 0] = ONE;
b[ 1] = ZERO;
#else
b[ 0] = *(a01 + 0);
b[ 1] = *(a01 + 1);
#endif
b[ 2] = ZERO;
b[ 3] = ZERO;
b[ 4] = ZERO;
b[ 5] = ZERO;
b[ 6] = ZERO;
b[ 7] = ZERO;
b[ 8] = *(a02 + 0);
b[ 9] = *(a02 + 1);
#ifdef UNIT
b[ 10] = ONE;
b[ 11] = ZERO;
#else
b[ 10] = *(a02 + 2);
b[ 11] = *(a02 + 3);
#endif
b[ 12] = ZERO;
b[ 13] = ZERO;
b[ 14] = ZERO;
b[ 15] = ZERO;
b[ 16] = *(a03 + 0);
b[ 17] = *(a03 + 1);
b[ 18] = *(a03 + 2);
b[ 19] = *(a03 + 3);
#ifdef UNIT
b[ 20] = ONE;
b[ 21] = ZERO;
#else
b[ 20] = *(a03 + 4);
b[ 21] = *(a03 + 5);
#endif
b[ 22] = ZERO;
b[ 23] = ZERO;
b[ 24] = *(a04 + 0);
b[ 25] = *(a04 + 1);
b[ 26] = *(a04 + 2);
b[ 27] = *(a04 + 3);
b[ 28] = *(a04 + 4);
b[ 29] = *(a04 + 5);
#ifdef UNIT
b[ 30] = ONE;
b[ 31] = ZERO;
#else
b[ 30] = *(a04 + 6);
b[ 31] = *(a04 + 7);
#endif
a01 += 4 * lda;
a02 += 4 * lda;
a03 += 4 * lda;
a04 += 4 * lda;
b += 32;
}
X += 4;
i --;
} while (i > 0);
}
i = (m & 3);
if (i) {
if (X < posY) {
a01 += 2 * i;
a02 += 2 * i;
a03 += 2 * i;
a04 += 2 * i;
b += 8 * i;
} else
if (X > posY) {
for (ii = 0; ii < i; ii++){
b[ 0] = *(a01 + 0);
b[ 1] = *(a01 + 1);
b[ 2] = *(a01 + 2);
b[ 3] = *(a01 + 3);
b[ 4] = *(a01 + 4);
b[ 5] = *(a01 + 5);
b[ 6] = *(a01 + 6);
b[ 7] = *(a01 + 7);
a01 += lda;
a02 += lda;
a03 += lda;
a04 += lda;
b += 8;
}
} else {
#ifdef UNIT
b[ 0] = ONE;
b[ 1] = ZERO;
#else
b[ 0] = *(a01 + 0);
b[ 1] = *(a01 + 1);
#endif
b[ 2] = ZERO;
b[ 3] = ZERO;
b[ 4] = ZERO;
b[ 5] = ZERO;
b[ 6] = ZERO;
b[ 7] = ZERO;
b += 8;
if(i >= 2) {
b[ 0] = *(a02 + 0);
b[ 1] = *(a02 + 1);
#ifdef UNIT
b[ 2] = ONE;
b[ 3] = ZERO;
#else
b[ 2] = *(a02 + 2);
b[ 3] = *(a02 + 3);
#endif
b[ 4] = ZERO;
b[ 5] = ZERO;
b[ 6] = ZERO;
b[ 7] = ZERO;
b += 8;
}
if (i >= 3) {
b[ 0] = *(a03 + 0);
b[ 1] = *(a03 + 1);
b[ 2] = *(a03 + 2);
b[ 3] = *(a03 + 3);
#ifdef UNIT
b[ 4] = ONE;
b[ 5] = ZERO;
#else
b[ 4] = *(a03 + 4);
b[ 5] = *(a03 + 5);
#endif
b[ 6] = ZERO;
b[ 7] = ZERO;
b += 8;
}
}
}
posY += 4;
}
if (n & 2){
X = posX;
if (posX <= posY) {
a01 = a + posX * 2 + (posY + 0) * lda;
a02 = a + posX * 2 + (posY + 1) * lda;
} else {
a01 = a + posY * 2 + (posX + 0) * lda;
a02 = a + posY * 2 + (posX + 1) * lda;
}
i = (m >> 1);
if (i > 0) {
do {
if (X < posY) {
a01 += 4;
a02 += 4;
b += 8;
} else
if (X > posY) {
b[ 0] = *(a01 + 0);
b[ 1] = *(a01 + 1);
b[ 2] = *(a01 + 2);
b[ 3] = *(a01 + 3);
b[ 4] = *(a02 + 0);
b[ 5] = *(a02 + 1);
b[ 6] = *(a02 + 2);
b[ 7] = *(a02 + 3);
a01 += 2 * lda;
a02 += 2 * lda;
b += 8;
} else {
#ifdef UNIT
b[ 0] = ONE;
b[ 1] = ZERO;
#else
b[ 0] = *(a01 + 0);
b[ 1] = *(a01 + 1);
#endif
b[ 2] = ZERO;
b[ 3] = ZERO;
b[ 4] = *(a02 + 0);
b[ 5] = *(a02 + 1);
#ifdef UNIT
b[ 6] = ONE;
b[ 7] = ZERO;
#else
b[ 6] = *(a02 + 2);
b[ 7] = *(a02 + 3);
#endif
a01 += 2 * lda;
a02 += 2 * lda;
b += 8;
}
X += 2;
i --;
} while (i > 0);
}
i = (m & 1);
if (i) {
if (X < posY) {
b += 4;
} else
if (X > posY) {
b[ 0] = *(a01 + 0);
b[ 1] = *(a01 + 1);
b[ 2] = *(a01 + 2);
b[ 3] = *(a01 + 3);
b += 4;
}
} else {
#ifdef UNIT
b[ 0] = ONE;
b[ 1] = ZERO;
#else
b[ 0] = *(a01 + 0);
b[ 1] = *(a01 + 1);
#endif
b[ 2] = *(a02 + 0);
b[ 3] = *(a02 + 1);
b += 4;
}
posY += 2;
}
if (n & 1){
X = posX;
if (posX <= posY) {
a01 = a + posX * 2 + (posY + 0) * lda;
} else {
a01 = a + posY * 2 + (posX + 0) * lda;
}
i = m;
if (m > 0) {
do {
if (X < posY) {
a01 += 2;
b += 2;
} else
if (X > posY) {
b[ 0] = *(a01 + 0);
b[ 1] = *(a01 + 1);
a01 += lda;
b += 2;
} else {
#ifdef UNIT
b[ 0] = ONE;
b[ 1] = ZERO;
#else
b[ 0] = *(a01 + 0);
b[ 1] = *(a01 + 1);
#endif
a01 += lda;
b += 2;
}
X += 1;
i --;
} while (i > 0);
}
}
return 0;
}