1 #ifndef _ASM_IA64_FPU_H
2 #define _ASM_IA64_FPU_H
3
4 /*
5 * Copyright (C) 1998, 1999 Hewlett-Packard Co
6 * Copyright (C) 1998, 1999 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 } u;
61 } __attribute__ ((aligned (16)));
62
63 # endif /* __ASSEMBLY__ */
64
65 #endif /* _ASM_IA64_FPU_H */
66
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