diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /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.h | 65 |
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_ */ | ||