EmbeddedPkg: Extend NvVarStoreFormattedLib LIBRARY_CLASS

[mirror_edk2.git] / StdLib / LibC / Main / Arm / flt_rounds.c

/*  $NetBSD: flt_rounds.c,v 1.3 2006/02/25 00:58:35 wiz Exp $ */\r
\r
/*\r
 * Copyright (c) 1996 Mark Brinicombe\r
 * All rights reserved.\r
 *\r
 * Redistribution and use in source and binary forms, with or without\r
 * modification, are permitted provided that the following conditions\r
 * are met:\r
 * 1. Redistributions of source code must retain the above copyright\r
 *    notice, this list of conditions and the following disclaimer.\r
 * 2. Redistributions in binary form must reproduce the above copyright\r
 *    notice, this list of conditions and the following disclaimer in the\r
 *    documentation and/or other materials provided with the distribution.\r
 * 3. All advertising materials mentioning features or use of this software\r
 *    must display the following acknowledgement:\r
 *      This product includes software developed by Mark Brinicombe\r
 *  for the NetBSD Project.\r
 * 4. The name of the author may not be used to endorse or promote products\r
 *    derived from this software without specific prior written permission\r
 *\r
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR\r
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES\r
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.\r
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,\r
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT\r
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\r
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\r
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\r
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF\r
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\r
 */\r
\r
#include <sys/EfiCdefs.h>\r
#if defined(LIBC_SCCS) && !defined(lint)\r
__RCSID("$NetBSD: flt_rounds.c,v 1.3 2006/02/25 00:58:35 wiz Exp $");\r
#endif /* LIBC_SCCS and not lint */\r
\r
#include <sys/types.h>\r
//#include <ieeefp.h>\r
\r
static const int map[] = {\r
  1,  /* round to nearest */\r
  2,  /* round to positive infinity */\r
  3,  /* round to negative infinity */\r
  0   /* round to zero */\r
};\r
\r
/*\r
 * Return the current FP rounding mode\r
 *\r
 * Returns:\r
 *  0 - round to zero\r
 *  1 - round to nearest\r
 *  2 - round to postive infinity\r
 *  3 - round to negative infinity\r
 *\r
 * ok all we need to do is get the current FP rounding mode\r
 * index our map table and return the appropriate value.\r
 *\r
 * HOWEVER:\r
 * The ARM FPA codes the rounding mode into the actual FP instructions\r
 * so there is no such thing as a global rounding mode.\r
 * The default is round to nearest if rounding is not explicitly specified.\r
 * FP instructions generated by GCC will not explicitly specify a rounding\r
 * mode.\r
 *\r
 * So the best we can do it to return the rounding mode FP instructions\r
 * use if rounding is not specified which is round to nearest.\r
 *\r
 * This could change in the future with new floating point emulators or\r
 * soft float FP libraries.\r
 */\r
\r
int __flt_rounds(void);\r
\r
int\r
__flt_rounds()\r
{\r
  //return(map[fpgetround()]);\r
  return 1; //TODO: FixMe\r
}\r