70 lines
3.0 KiB
C
70 lines
3.0 KiB
C
/////////////////////////////////////////////////////////////////////////
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// $Id: status_w.h,v 1.13 2009-02-08 17:29:34 sshwarts Exp $
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/////////////////////////////////////////////////////////////////////////
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//
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// Copyright (c) 2003 Stanislav Shwartsman
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// Written by Stanislav Shwartsman [sshwarts at sourceforge net]
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but 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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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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//
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/////////////////////////////////////////////////////////////////////////
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#ifndef _STATUS_H_
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#define _STATUS_H_
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/* Status Word */
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#define FPU_SW_Backward (0x8000) /* backward compatibility */
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#define FPU_SW_C3 (0x4000) /* condition bit 3 */
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#define FPU_SW_Top (0x3800) /* top of stack */
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#define FPU_SW_C2 (0x0400) /* condition bit 2 */
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#define FPU_SW_C1 (0x0200) /* condition bit 1 */
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#define FPU_SW_C0 (0x0100) /* condition bit 0 */
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#define FPU_SW_Summary (0x0080) /* exception summary */
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#define FPU_SW_Stack_Fault (0x0040) /* stack fault */
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#define FPU_SW_Precision (0x0020) /* loss of precision */
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#define FPU_SW_Underflow (0x0010) /* underflow */
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#define FPU_SW_Overflow (0x0008) /* overflow */
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#define FPU_SW_Zero_Div (0x0004) /* divide by zero */
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#define FPU_SW_Denormal_Op (0x0002) /* denormalized operand */
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#define FPU_SW_Invalid (0x0001) /* invalid operation */
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#define FPU_SW_CC (FPU_SW_C0|FPU_SW_C1|FPU_SW_C2|FPU_SW_C3)
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#define FPU_SW_Exceptions_Mask (0x027f) /* status word exceptions bit mask */
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/* Exception flags: */
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#define FPU_EX_Precision (0x0020) /* loss of precision */
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#define FPU_EX_Underflow (0x0010) /* underflow */
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#define FPU_EX_Overflow (0x0008) /* overflow */
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#define FPU_EX_Zero_Div (0x0004) /* divide by zero */
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#define FPU_EX_Denormal (0x0002) /* denormalized operand */
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#define FPU_EX_Invalid (0x0001) /* invalid operation */
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/* Special exceptions: */
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#define FPU_EX_Stack_Overflow (0x0041|FPU_SW_C1) /* stack overflow */
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#define FPU_EX_Stack_Underflow (0x0041) /* stack underflow */
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/* precision control */
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#define FPU_EX_Precision_Lost_Up (EX_Precision | SW_C1)
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#define FPU_EX_Precision_Lost_Dn (EX_Precision)
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#define setcc(cc) \
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FPU_PARTIAL_STATUS = (FPU_PARTIAL_STATUS & ~(FPU_SW_CC)) | ((cc) & FPU_SW_CC)
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#define clear_C1() { FPU_PARTIAL_STATUS &= ~FPU_SW_C1; }
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#define clear_C2() { FPU_PARTIAL_STATUS &= ~FPU_SW_C2; }
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#endif
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