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Diffstat (limited to 'sysdeps/mips/fpu_control.h')
| -rw-r--r-- | sysdeps/mips/fpu_control.h | 133 |
1 files changed, 0 insertions, 133 deletions
diff --git a/sysdeps/mips/fpu_control.h b/sysdeps/mips/fpu_control.h deleted file mode 100644 index 2dddf49362..0000000000 --- a/sysdeps/mips/fpu_control.h +++ /dev/null @@ -1,133 +0,0 @@ -/* FPU control word bits. Mips version. - Copyright (C) 1996-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Olaf Flebbe and Ralf Baechle. - - 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 - -/* MIPS FPU floating point control register bits. - * - * 31-25 -> floating point conditions code bits 7-1. These bits are only - * available in MIPS IV. - * 24 -> flush denormalized results to zero instead of - * causing unimplemented operation exception. This bit is only - * available for MIPS III and newer. - * 23 -> Condition bit - * 22-21 -> reserved for architecture implementers - * 20 -> reserved (read as 0, write with 0) - * 19 -> IEEE 754-2008 non-arithmetic ABS.fmt and NEG.fmt enable - * 18 -> IEEE 754-2008 recommended NaN encoding enable - * 17 -> cause bit for unimplemented operation - * 16 -> cause bit for invalid exception - * 15 -> cause bit for division by zero exception - * 14 -> cause bit for overflow exception - * 13 -> cause bit for underflow exception - * 12 -> cause bit for inexact exception - * 11 -> enable exception for invalid exception - * 10 -> enable exception for division by zero exception - * 9 -> enable exception for overflow exception - * 8 -> enable exception for underflow exception - * 7 -> enable exception for inexact exception - * 6 -> flag invalid exception - * 5 -> flag division by zero exception - * 4 -> flag overflow exception - * 3 -> flag underflow exception - * 2 -> flag inexact exception - * 1-0 -> rounding control - * - * - * Rounding Control: - * 00 - rounding to nearest (RN) - * 01 - rounding toward zero (RZ) - * 10 - rounding (up) toward plus infinity (RP) - * 11 - rounding (down)toward minus infinity (RM) - */ - -#include <features.h> - -#ifdef __mips_soft_float - -#define _FPU_RESERVED 0xffffffff -#define _FPU_DEFAULT 0x00000000 -typedef unsigned int fpu_control_t; -#define _FPU_GETCW(cw) (cw) = 0 -#define _FPU_SETCW(cw) (void) (cw) -extern fpu_control_t __fpu_control; - -#else /* __mips_soft_float */ - -/* Masks for interrupts. */ -#define _FPU_MASK_V 0x0800 /* Invalid operation */ -#define _FPU_MASK_Z 0x0400 /* Division by zero */ -#define _FPU_MASK_O 0x0200 /* Overflow */ -#define _FPU_MASK_U 0x0100 /* Underflow */ -#define _FPU_MASK_I 0x0080 /* Inexact operation */ - -/* Flush denormalized numbers to zero. */ -#define _FPU_FLUSH_TZ 0x1000000 - -/* IEEE 754-2008 compliance control. */ -#define _FPU_ABS2008 0x80000 -#define _FPU_NAN2008 0x40000 - -/* Rounding control. */ -#define _FPU_RC_NEAREST 0x0 /* RECOMMENDED */ -#define _FPU_RC_ZERO 0x1 -#define _FPU_RC_UP 0x2 -#define _FPU_RC_DOWN 0x3 -/* Mask for rounding control. */ -#define _FPU_RC_MASK 0x3 - -#define _FPU_RESERVED 0xfe8c0000 /* Reserved bits in cw, incl ABS/NAN2008. */ - - -/* The fdlibm code requires strict IEEE double precision arithmetic, - and no interrupts for exceptions, rounding to nearest. */ -#ifdef __mips_nan2008 -# define _FPU_DEFAULT 0x000C0000 -#else -# define _FPU_DEFAULT 0x00000000 -#endif - -/* IEEE: same as above, but exceptions. */ -#ifdef __mips_nan2008 -# define _FPU_IEEE 0x000C0F80 -#else -# define _FPU_IEEE 0x00000F80 -#endif - -/* Type of the control word. */ -typedef unsigned int fpu_control_t __attribute__ ((__mode__ (__SI__))); - -/* Macros for accessing the hardware control word. */ -extern fpu_control_t __mips_fpu_getcw (void) __THROW; -extern void __mips_fpu_setcw (fpu_control_t) __THROW; -#ifdef __mips16 -# define _FPU_GETCW(cw) do { (cw) = __mips_fpu_getcw (); } while (0) -# define _FPU_SETCW(cw) __mips_fpu_setcw (cw) -#else -# define _FPU_GETCW(cw) __asm__ volatile ("cfc1 %0,$31" : "=r" (cw)) -# define _FPU_SETCW(cw) __asm__ volatile ("ctc1 %0,$31" : : "r" (cw)) -#endif - -/* Default control word set at startup. */ -extern fpu_control_t __fpu_control; - -#endif /* __mips_soft_float */ - -#endif /* fpu_control.h */ |