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/*
BLIS
An object-based framework for developing high-performance BLAS-like
libraries.
Copyright (C) 2014, The University of Texas at Austin
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
- Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
- 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.
- Neither the name(s) of the copyright holder(s) 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 COPYRIGHT
HOLDER 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 "blis.h"
#define FUNCPTR_T machval_fp
typedef void (*FUNCPTR_T)(
machval_t mval,
void* v
);
static FUNCPTR_T GENARRAY(ftypes,machval);
//
// Define object-based interface.
//
void bli_machval( machval_t mval,
obj_t* v )
{
num_t dt_v = bli_obj_dt( v );
void* buf_v = bli_obj_buffer_at_off( v );
FUNCPTR_T f;
// Index into the function pointer array.
f = ftypes[dt_v];
// Invoke the function.
f( mval,
buf_v );
}
//
// Define BLAS-like interfaces.
//
#undef GENTFUNCR
#define GENTFUNCR( ctype_v, ctype_vr, chv, chvr, opname, varname ) \
\
void PASTEMAC(chv,opname) \
( \
machval_t mval, \
void* v \
) \
{ \
static ctype_vr pvals[ BLIS_NUM_MACH_PARAMS ]; \
\
static bool first_time = TRUE; \
\
dim_t val_i = mval - BLIS_MACH_PARAM_FIRST; \
ctype_v* v_cast = v; \
\
/* If this is the first time through, call the underlying
code to discover each machine parameter. */ \
if ( first_time ) \
{ \
char lapack_mval; \
dim_t m, i; \
\
for( i = 0, m = BLIS_MACH_PARAM_FIRST; \
i < BLIS_NUM_MACH_PARAMS - 1; \
++i, ++m ) \
{ \
bli_param_map_blis_to_netlib_machval( m, &lapack_mval ); \
\
/*printf( "bli_machval: querying %u %c\n", m, lapack_mval );*/ \
\
pvals[i] = PASTEMAC(chvr,varname)( &lapack_mval, 1 ); \
\
/*printf( "bli_machval: got back %34.29e\n", pvals[i] ); */ \
} \
\
/* Store epsilon^2 in the last element. */ \
pvals[i] = pvals[0] * pvals[0]; \
\
first_time = FALSE; \
} \
\
/* Copy the requested parameter value to the output buffer, which
may involve a demotion from the complex to real domain. */ \
PASTEMAC2(chvr,chv,copys)( pvals[ val_i ], *v_cast ); \
}
INSERT_GENTFUNCR_BASIC( machval, lamch )
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