| /* FPU control word definitions. HP-PARISC version. |
| Copyright (C) 2012-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library. If not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef _FPU_CONTROL_H |
| #define _FPU_CONTROL_H |
| |
| /* Masking of interrupts */ |
| #define _FPU_MASK_PM 0x00000001 /* Inexact (I) */ |
| #define _FPU_MASK_UM 0x00000002 /* Underflow (U) */ |
| #define _FPU_MASK_OM 0x00000004 /* Overflow (O) */ |
| #define _FPU_MASK_ZM 0x00000008 /* Divide by zero (Z) */ |
| #define _FPU_MASK_IM 0x00000010 /* Invalid operation (V) */ |
| |
| /* Masking of rounding modes. */ |
| #define _FPU_HPPA_MASK_RM 0x00000600 /* Rounding mode mask */ |
| /* Masking of interrupt enable bits. */ |
| #define _FPU_HPPA_MASK_INT 0x0000001f /* Interrupt mask */ |
| |
| /* There are no reserved bits in the PA fpsr (though some are undefined). */ |
| #define _FPU_RESERVED 0x00000000 |
| /* Default is: No traps enabled, no flags set, round to nearest. */ |
| #define _FPU_DEFAULT 0x00000000 |
| /* Default + exceptions (FE_ALL_EXCEPT) enabled. */ |
| #define _FPU_IEEE (_FPU_DEFAULT | _FPU_HPPA_MASK_INT) |
| |
| /* Type of the control word. */ |
| typedef unsigned int fpu_control_t; |
| |
| /* Macros for accessing the hardware control word. */ |
| #define _FPU_GETCW(cw) \ |
| ({ \ |
| union { __extension__ unsigned long long __fpreg; unsigned int __halfreg[2]; } __fullfp; \ |
| /* Get the current status word. */ \ |
| __asm__ ("fstd %%fr0,0(%1)\n\t" \ |
| "fldd 0(%1),%%fr0\n\t" \ |
| : "=m" (__fullfp.__fpreg) : "r" (&__fullfp.__fpreg) : "%r0"); \ |
| cw = __fullfp.__halfreg[0]; \ |
| }) |
| |
| #define _FPU_SETCW(cw) \ |
| ({ \ |
| union { __extension__ unsigned long long __fpreg; unsigned int __halfreg[2]; } __fullfp; \ |
| __fullfp.__halfreg[0] = cw; \ |
| __asm__ ("fldd 0(%1),%%fr0\n\t" \ |
| : : "m" (__fullfp.__fpreg), "r" (&__fullfp.__fpreg) : "%r0" ); \ |
| }) |
| |
| /* Default control word set at startup. */ |
| extern fpu_control_t __fpu_control; |
| |
| #endif /* _FPU_CONTROL_H */ |