Release 4.14 arch/x86/math-emu/status_w.h

/* SPDX-License-Identifier: GPL-2.0 */
/*---------------------------------------------------------------------------+
 |  status_w.h                                                               |
 |                                                                           |
 | Copyright (C) 1992,1993                                                   |
 |                       W. Metzenthen, 22 Parker St, Ormond, Vic 3163,      |
 |                       Australia.  E-mail   billm@vaxc.cc.monash.edu.au    |
 |                                                                           |
 +---------------------------------------------------------------------------*/

#ifndef _STATUS_H_

#define _STATUS_H_

#include "fpu_emu.h"		/* for definition of PECULIAR_486 */

#ifdef __ASSEMBLY__

#define	Const__(x)	$##x
#else

#define	Const__(x)	x
#endif


#define SW_Backward    	Const__(0x8000)	
/* backward compatibility */

#define SW_C3		Const__(0x4000)	
/* condition bit 3 */

#define SW_Top		Const__(0x3800)	
/* top of stack */

#define SW_Top_Shift 	Const__(11)	
/* shift for top of stack bits */

#define SW_C2		Const__(0x0400)	
/* condition bit 2 */

#define SW_C1		Const__(0x0200)	
/* condition bit 1 */

#define SW_C0		Const__(0x0100)	
/* condition bit 0 */

#define SW_Summary     	Const__(0x0080)	
/* exception summary */

#define SW_Stack_Fault	Const__(0x0040)	
/* stack fault */

#define SW_Precision   	Const__(0x0020)	
/* loss of precision */

#define SW_Underflow   	Const__(0x0010)	
/* underflow */

#define SW_Overflow    	Const__(0x0008)	
/* overflow */

#define SW_Zero_Div    	Const__(0x0004)	
/* divide by zero */

#define SW_Denorm_Op   	Const__(0x0002)	
/* denormalized operand */

#define SW_Invalid     	Const__(0x0001)	
/* invalid operation */


#define SW_Exc_Mask     Const__(0x27f)	
/* Status word exception bit mask */

#ifndef __ASSEMBLY__


#define COMP_A_gt_B	1

#define COMP_A_eq_B	2

#define COMP_A_lt_B	3

#define COMP_No_Comp	4

#define COMP_Denormal   0x20

#define COMP_NaN	0x40

#define COMP_SNaN	0x80


#define status_word() \
  ((partial_status & ~SW_Top & 0xffff) | ((top << SW_Top_Shift) & SW_Top))


static inline void setcc(int cc)
{
	partial_status &= ~(SW_C0 | SW_C1 | SW_C2 | SW_C3);
	partial_status |= (cc) & (SW_C0 | SW_C1 | SW_C2 | SW_C3);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Randy Dunlap
35
89.74%
1
50.00%
Linus Torvalds (pre-git)
4
10.26%
1
50.00%
Total
39
100.00%
2
100.00%

#ifdef PECULIAR_486
   /* Default, this conveys no information, but an 80486 does it. */
   /* Clear the SW_C1 bit, "other bits undefined". */

#  define clear_C1()  { partial_status &= ~SW_C1; }
# else

#  define clear_C1()
#endif /* PECULIAR_486 */

#endif /* __ASSEMBLY__ */

#endif /* _STATUS_H_ */
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
175
81.78%
6
66.67%
Randy Dunlap
35
16.36%
1
11.11%
Linus Torvalds
3
1.40%
1
11.11%
Greg Kroah-Hartman
1
0.47%
1
11.11%
Total
214
100.00%
9
100.00%
Directory: arch/x86/math-emu

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