Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | /* floating point status register: */ |
| 10 | #define FPSR_TRAP_VD (1 << 0) /* invalid op trap disabled */ |
| 11 | #define FPSR_TRAP_DD (1 << 1) /* denormal trap disabled */ |
| 12 | #define FPSR_TRAP_ZD (1 << 2) /* zero-divide trap disabled */ |
| 13 | #define FPSR_TRAP_OD (1 << 3) /* overflow trap disabled */ |
| 14 | #define FPSR_TRAP_UD (1 << 4) /* underflow trap disabled */ |
| 15 | #define FPSR_TRAP_ID (1 << 5) /* inexact trap disabled */ |
| 16 | #define FPSR_S0(x) ((x) << 6) |
| 17 | #define FPSR_S1(x) ((x) << 19) |
| 18 | #define FPSR_S2(x) (__IA64_UL(x) << 32) |
| 19 | #define FPSR_S3(x) (__IA64_UL(x) << 45) |
| 20 | |
| 21 | /* floating-point status field controls: */ |
| 22 | #define FPSF_FTZ (1 << 0) /* flush-to-zero */ |
| 23 | #define FPSF_WRE (1 << 1) /* widest-range exponent */ |
| 24 | #define FPSF_PC(x) (((x) & 0x3) << 2) /* precision control */ |
| 25 | #define FPSF_RC(x) (((x) & 0x3) << 4) /* rounding control */ |
| 26 | #define FPSF_TD (1 << 6) /* trap disabled */ |
| 27 | |
| 28 | /* floating-point status field flags: */ |
| 29 | #define FPSF_V (1 << 7) /* invalid operation flag */ |
| 30 | #define FPSF_D (1 << 8) /* denormal/unnormal operand flag */ |
| 31 | #define FPSF_Z (1 << 9) /* zero divide (IEEE) flag */ |
| 32 | #define FPSF_O (1 << 10) /* overflow (IEEE) flag */ |
| 33 | #define FPSF_U (1 << 11) /* underflow (IEEE) flag */ |
| 34 | #define FPSF_I (1 << 12) /* inexact (IEEE) flag) */ |
| 35 | |
| 36 | /* floating-point rounding control: */ |
| 37 | #define FPRC_NEAREST 0x0 |
| 38 | #define FPRC_NEGINF 0x1 |
| 39 | #define FPRC_POSINF 0x2 |
| 40 | #define FPRC_TRUNC 0x3 |
| 41 | |
| 42 | #define FPSF_DEFAULT (FPSF_PC (0x3) | FPSF_RC (FPRC_NEAREST)) |
| 43 | |
| 44 | /* This default value is the same as HP-UX uses. Don't change it |
| 45 | without a very good reason. */ |
| 46 | #define FPSR_DEFAULT (FPSR_TRAP_VD | FPSR_TRAP_DD | FPSR_TRAP_ZD \ |
| 47 | | FPSR_TRAP_OD | FPSR_TRAP_UD | FPSR_TRAP_ID \ |
| 48 | | FPSR_S0 (FPSF_DEFAULT) \ |
| 49 | | FPSR_S1 (FPSF_DEFAULT | FPSF_TD | FPSF_WRE) \ |
| 50 | | FPSR_S2 (FPSF_DEFAULT | FPSF_TD) \ |
| 51 | | FPSR_S3 (FPSF_DEFAULT | FPSF_TD)) |
| 52 | |
| 53 | # ifndef __ASSEMBLY__ |
| 54 | |
| 55 | struct ia64_fpreg { |
| 56 | union { |
| 57 | unsigned long bits[2]; |
| 58 | long double __dummy; /* force 16-byte alignment */ |
| 59 | } u; |
| 60 | }; |
| 61 | |
| 62 | # endif /* __ASSEMBLY__ */ |
| 63 | |
| 64 | #endif /* _ASM_IA64_FPU_H */ |