115 lines
3.9 KiB
C
115 lines
3.9 KiB
C
/***************************************************************************
|
|
Copyright (c) 2014, The OpenBLAS Project
|
|
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.
|
|
3. Neither the name of the OpenBLAS project nor the names of
|
|
its contributors may be used to endorse or promote products
|
|
derived from this software without specific prior written permission.
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 OPENBLAS PROJECT 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.
|
|
*****************************************************************************/
|
|
|
|
#include <stddef.h>
|
|
#include "common.h"
|
|
|
|
#if defined(DOUBLE)
|
|
#define FLOAT_TYPE double
|
|
#elif defined(SINGLE)
|
|
#define FLOAT_TYPE float
|
|
#else
|
|
#endif
|
|
|
|
/* Notes for algorithm:
|
|
* - Input denormal treated as zero
|
|
* - Force to be QNAN
|
|
*/
|
|
static void bf16to_kernel_1(BLASLONG n, const bfloat16 * in, BLASLONG inc_in, FLOAT_TYPE * out, BLASLONG inc_out)
|
|
{
|
|
BLASLONG register index_in = 0;
|
|
BLASLONG register index_out = 0;
|
|
BLASLONG register index = 0;
|
|
uint16_t * tmp = NULL;
|
|
#if defined(DOUBLE)
|
|
float float_out = 0.0;
|
|
#endif
|
|
|
|
while(index<n) {
|
|
#if defined(DOUBLE)
|
|
float_out = 0.0;
|
|
tmp = (uint16_t*)(&float_out);
|
|
#else
|
|
*(out+index_out) = 0;
|
|
tmp = (uint16_t*)(out+index_out);
|
|
#endif
|
|
|
|
switch((*(in+index_in)) & 0xff80u) {
|
|
case (0x0000u): /* Type 1: Positive denormal */
|
|
tmp[1] = 0x0000u;
|
|
tmp[0] = 0x0000u;
|
|
break;
|
|
case (0x8000u): /* Type 2: Negative denormal */
|
|
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
|
|
tmp[1] = 0x8000u;
|
|
tmp[0] = 0x0000u;
|
|
#else
|
|
tmp[1] = 0x0000u;
|
|
tmp[0] = 0x8000u;
|
|
#endif
|
|
break;
|
|
case (0x7f80u): /* Type 3: Positive infinity or NAN */
|
|
case (0xff80u): /* Type 4: Negative infinity or NAN */
|
|
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
|
|
tmp[1] = *(in+index_in);
|
|
#else
|
|
tmp[0] = *(in+index_in);
|
|
#endif
|
|
/* Specific for NAN */
|
|
if (((*(in+index_in)) & 0x007fu) != 0) {
|
|
/* Force to be QNAN */
|
|
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
|
|
tmp[1] |= 0x0040u;
|
|
#else
|
|
tmp[0] |= 0x0040u;
|
|
#endif
|
|
}
|
|
break;
|
|
default: /* Type 5: Normal case */
|
|
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
|
|
tmp[1] = *(in+index_in);
|
|
#else
|
|
tmp[0] = *(in+index_in);
|
|
#endif
|
|
break;
|
|
}
|
|
#if defined(DOUBLE)
|
|
*(out+index_out) = (double)float_out;
|
|
#endif
|
|
index_in += inc_in;
|
|
index_out += inc_out;
|
|
index++;
|
|
}
|
|
}
|
|
|
|
void CNAME(BLASLONG n, bfloat16 * in, BLASLONG inc_in, FLOAT_TYPE * out, BLASLONG inc_out)
|
|
{
|
|
if (n <= 0) return;
|
|
|
|
bf16to_kernel_1(n, in, inc_in, out, inc_out);
|
|
}
|