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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/i386/math-emu/status_w.h
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/i386/math-emu/status_w.h')
-rw-r--r--arch/i386/math-emu/status_w.h65
1 files changed, 65 insertions, 0 deletions
diff --git a/arch/i386/math-emu/status_w.h b/arch/i386/math-emu/status_w.h
new file mode 100644
index 000000000000..78d7b7689dd6
--- /dev/null
+++ b/arch/i386/math-emu/status_w.h
@@ -0,0 +1,65 @@
1/*---------------------------------------------------------------------------+
2 | status_w.h |
3 | |
4 | Copyright (C) 1992,1993 |
5 | W. Metzenthen, 22 Parker St, Ormond, Vic 3163, |
6 | Australia. E-mail billm@vaxc.cc.monash.edu.au |
7 | |
8 +---------------------------------------------------------------------------*/
9
10#ifndef _STATUS_H_
11#define _STATUS_H_
12
13#include "fpu_emu.h" /* for definition of PECULIAR_486 */
14
15#ifdef __ASSEMBLY__
16#define Const__(x) $##x
17#else
18#define Const__(x) x
19#endif
20
21#define SW_Backward Const__(0x8000) /* backward compatibility */
22#define SW_C3 Const__(0x4000) /* condition bit 3 */
23#define SW_Top Const__(0x3800) /* top of stack */
24#define SW_Top_Shift Const__(11) /* shift for top of stack bits */
25#define SW_C2 Const__(0x0400) /* condition bit 2 */
26#define SW_C1 Const__(0x0200) /* condition bit 1 */
27#define SW_C0 Const__(0x0100) /* condition bit 0 */
28#define SW_Summary Const__(0x0080) /* exception summary */
29#define SW_Stack_Fault Const__(0x0040) /* stack fault */
30#define SW_Precision Const__(0x0020) /* loss of precision */
31#define SW_Underflow Const__(0x0010) /* underflow */
32#define SW_Overflow Const__(0x0008) /* overflow */
33#define SW_Zero_Div Const__(0x0004) /* divide by zero */
34#define SW_Denorm_Op Const__(0x0002) /* denormalized operand */
35#define SW_Invalid Const__(0x0001) /* invalid operation */
36
37#define SW_Exc_Mask Const__(0x27f) /* Status word exception bit mask */
38
39#ifndef __ASSEMBLY__
40
41#define COMP_A_gt_B 1
42#define COMP_A_eq_B 2
43#define COMP_A_lt_B 3
44#define COMP_No_Comp 4
45#define COMP_Denormal 0x20
46#define COMP_NaN 0x40
47#define COMP_SNaN 0x80
48
49#define status_word() \
50 ((partial_status & ~SW_Top & 0xffff) | ((top << SW_Top_Shift) & SW_Top))
51#define setcc(cc) ({ \
52 partial_status &= ~(SW_C0|SW_C1|SW_C2|SW_C3); \
53 partial_status |= (cc) & (SW_C0|SW_C1|SW_C2|SW_C3); })
54
55#ifdef PECULIAR_486
56 /* Default, this conveys no information, but an 80486 does it. */
57 /* Clear the SW_C1 bit, "other bits undefined". */
58# define clear_C1() { partial_status &= ~SW_C1; }
59# else
60# define clear_C1()
61#endif /* PECULIAR_486 */
62
63#endif /* __ASSEMBLY__ */
64
65#endif /* _STATUS_H_ */