98 lines
2.9 KiB
Diff
98 lines
2.9 KiB
Diff
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---
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ieee-utils/fp-win.c | 70 +++++++++++++++++++++++++++++++++++++++++++++++++++++
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ieee-utils/fp.c | 2 ++
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2 files changed, 72 insertions(+)
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create mode 100644 ieee-utils/fp-win.c
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diff --git a/ieee-utils/fp-win.c b/ieee-utils/fp-win.c
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new file mode 100644
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index 0000000..e024eae
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--- /dev/null
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+++ b/ieee-utils/fp-win.c
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@@ -0,0 +1,70 @@
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+/* fp-win.c
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+ *
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+ * Author: Brian Gladman
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License as published by
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+ * the Free Software Foundation; either version 2 of the License, or (at
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+ * your option) any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful, but
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+ * WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ * General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program; if not, write to the Free Software
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+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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+ */
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+
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+#include <float.h>
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+
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+#include <config.h>
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+#include <gsl/gsl_ieee_utils.h>
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+#include <gsl/gsl_errno.h>
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+
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+const char *fp_env_string = "round-to-nearest,double-precision,mask-all";
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+
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+int
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+gsl_ieee_set_mode (int precision, int rounding, int exception_mask)
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+{
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+ unsigned int old, mode = _DN_SAVE, mask = _MCW_DN | _MCW_RC | _MCW_EM;
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+
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+ switch(precision)
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+ {
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+ case GSL_IEEE_SINGLE_PRECISION: mode |= _PC_24; break;
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+ case GSL_IEEE_EXTENDED_PRECISION: mode |= _PC_64; break;
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+ case GSL_IEEE_DOUBLE_PRECISION:
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+ default: mode |= _PC_53;
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+ }
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+#ifndef _M_AMD64
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+ mask |= _MCW_PC;
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+#endif
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+
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+ switch(rounding)
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+ {
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+ case GSL_IEEE_ROUND_DOWN: mode |= _RC_DOWN; break;
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+ case GSL_IEEE_ROUND_UP: mode |= _RC_UP; break;
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+ case GSL_IEEE_ROUND_TO_ZERO: mode |= _RC_CHOP; break;
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+ case GSL_IEEE_ROUND_TO_NEAREST:
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+ default: mode |= _RC_NEAR;
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+ }
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+
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+ if(exception_mask & GSL_IEEE_MASK_INVALID)
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+ mode |= _EM_INVALID;
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+ if(exception_mask & GSL_IEEE_MASK_DENORMALIZED)
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+ mode |= _EM_DENORMAL;
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+ if(exception_mask & GSL_IEEE_MASK_DIVISION_BY_ZERO)
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+ mode |= _EM_ZERODIVIDE;
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+ if(exception_mask & GSL_IEEE_MASK_OVERFLOW)
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+ mode |= _EM_OVERFLOW;
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+ if(exception_mask & GSL_IEEE_MASK_UNDERFLOW)
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+ mode |= _EM_UNDERFLOW;
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+ if(exception_mask & GSL_IEEE_TRAP_INEXACT)
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+ mode &= ~_EM_INEXACT;
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+ else
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+ mode |= _EM_INEXACT;
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+
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+ _controlfp_s( &old, mode, mask);
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+ return GSL_SUCCESS;
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+}
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diff --git a/ieee-utils/fp.c b/ieee-utils/fp.c
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index 445a14f..b6ae5af 100644
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--- a/ieee-utils/fp.c
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+++ b/ieee-utils/fp.c
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@@ -45,6 +45,8 @@
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#endif
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#elif HAVE_DECL_FEENABLEEXCEPT || HAVE_DECL_FESETTRAPENABLE
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#include "fp-gnuc99.c"
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+#elif _MSC_VER
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+#include "fp-win.c"
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#else
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#include "fp-unknown.c"
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#endif
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--
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