Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | #ifndef _ASM_IA64_FPU_H |
2 | #define _ASM_IA64_FPU_H | |
3 | ||
4 | /* | |
5 | * Copyright (C) 1998, 1999, 2002, 2003 Hewlett-Packard Co | |
6 | * David Mosberger-Tang <davidm@hpl.hp.com> | |
7 | */ | |
8 | ||
9 | #include <asm/types.h> | |
10 | ||
11 | /* floating point status register: */ | |
12 | #define FPSR_TRAP_VD (1 << 0) /* invalid op trap disabled */ | |
13 | #define FPSR_TRAP_DD (1 << 1) /* denormal trap disabled */ | |
14 | #define FPSR_TRAP_ZD (1 << 2) /* zero-divide trap disabled */ | |
15 | #define FPSR_TRAP_OD (1 << 3) /* overflow trap disabled */ | |
16 | #define FPSR_TRAP_UD (1 << 4) /* underflow trap disabled */ | |
17 | #define FPSR_TRAP_ID (1 << 5) /* inexact trap disabled */ | |
18 | #define FPSR_S0(x) ((x) << 6) | |
19 | #define FPSR_S1(x) ((x) << 19) | |
20 | #define FPSR_S2(x) (__IA64_UL(x) << 32) | |
21 | #define FPSR_S3(x) (__IA64_UL(x) << 45) | |
22 | ||
23 | /* floating-point status field controls: */ | |
24 | #define FPSF_FTZ (1 << 0) /* flush-to-zero */ | |
25 | #define FPSF_WRE (1 << 1) /* widest-range exponent */ | |
26 | #define FPSF_PC(x) (((x) & 0x3) << 2) /* precision control */ | |
27 | #define FPSF_RC(x) (((x) & 0x3) << 4) /* rounding control */ | |
28 | #define FPSF_TD (1 << 6) /* trap disabled */ | |
29 | ||
30 | /* floating-point status field flags: */ | |
31 | #define FPSF_V (1 << 7) /* invalid operation flag */ | |
32 | #define FPSF_D (1 << 8) /* denormal/unnormal operand flag */ | |
33 | #define FPSF_Z (1 << 9) /* zero divide (IEEE) flag */ | |
34 | #define FPSF_O (1 << 10) /* overflow (IEEE) flag */ | |
35 | #define FPSF_U (1 << 11) /* underflow (IEEE) flag */ | |
36 | #define FPSF_I (1 << 12) /* inexact (IEEE) flag) */ | |
37 | ||
38 | /* floating-point rounding control: */ | |
39 | #define FPRC_NEAREST 0x0 | |
40 | #define FPRC_NEGINF 0x1 | |
41 | #define FPRC_POSINF 0x2 | |
42 | #define FPRC_TRUNC 0x3 | |
43 | ||
44 | #define FPSF_DEFAULT (FPSF_PC (0x3) | FPSF_RC (FPRC_NEAREST)) | |
45 | ||
46 | /* This default value is the same as HP-UX uses. Don't change it | |
47 | without a very good reason. */ | |
48 | #define FPSR_DEFAULT (FPSR_TRAP_VD | FPSR_TRAP_DD | FPSR_TRAP_ZD \ | |
49 | | FPSR_TRAP_OD | FPSR_TRAP_UD | FPSR_TRAP_ID \ | |
50 | | FPSR_S0 (FPSF_DEFAULT) \ | |
51 | | FPSR_S1 (FPSF_DEFAULT | FPSF_TD | FPSF_WRE) \ | |
52 | | FPSR_S2 (FPSF_DEFAULT | FPSF_TD) \ | |
53 | | FPSR_S3 (FPSF_DEFAULT | FPSF_TD)) | |
54 | ||
55 | # ifndef __ASSEMBLY__ | |
56 | ||
57 | struct ia64_fpreg { | |
58 | union { | |
59 | unsigned long bits[2]; | |
60 | long double __dummy; /* force 16-byte alignment */ | |
61 | } u; | |
62 | }; | |
63 | ||
64 | # endif /* __ASSEMBLY__ */ | |
65 | ||
66 | #endif /* _ASM_IA64_FPU_H */ |