003 File Manager
Current Path:
/usr/src/lib/msun/riscv
usr
/
src
/
lib
/
msun
/
riscv
/
📁
..
📄
Makefile.inc
(69 B)
📄
Symbol.map
(172 B)
📄
fenv.c
(2.64 KB)
📄
fenv.h
(5.7 KB)
Editing: fenv.h
/*- * Copyright (c) 2004-2005 David Schultz <das@FreeBSD.ORG> * Copyright (c) 2015-2016 Ruslan Bukin <br@bsdpad.com> * All rights reserved. * * Portions of this software were developed by SRI International and the * University of Cambridge Computer Laboratory under DARPA/AFRL contract * FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme. * * Portions of this software were developed by the University of Cambridge * Computer Laboratory as part of the CTSRD Project, with support from the * UK Higher Education Innovation Fund (HEIF). * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $FreeBSD$ */ #ifndef _FENV_H_ #define _FENV_H_ #include <sys/_types.h> #ifndef __fenv_static #define __fenv_static static #endif typedef __uint64_t fenv_t; typedef __uint64_t fexcept_t; /* Exception flags */ #define FE_INVALID 0x0010 #define FE_DIVBYZERO 0x0008 #define FE_OVERFLOW 0x0004 #define FE_UNDERFLOW 0x0002 #define FE_INEXACT 0x0001 #define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_INEXACT | \ FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW) /* * RISC-V Rounding modes */ #define _ROUND_SHIFT 5 #define FE_TONEAREST (0x00 << _ROUND_SHIFT) #define FE_TOWARDZERO (0x01 << _ROUND_SHIFT) #define FE_DOWNWARD (0x02 << _ROUND_SHIFT) #define FE_UPWARD (0x03 << _ROUND_SHIFT) #define _ROUND_MASK (FE_TONEAREST | FE_DOWNWARD | \ FE_UPWARD | FE_TOWARDZERO) __BEGIN_DECLS /* Default floating-point environment */ extern const fenv_t __fe_dfl_env; #define FE_DFL_ENV (&__fe_dfl_env) #if !defined(__riscv_float_abi_soft) && !defined(__riscv_float_abi_double) #if defined(__riscv_float_abi_single) #error single precision floating point ABI not supported #else #error compiler did not set soft/hard float macros #endif #endif #ifndef __riscv_float_abi_soft #define __rfs(__fcsr) __asm __volatile("csrr %0, fcsr" : "=r" (__fcsr)) #define __wfs(__fcsr) __asm __volatile("csrw fcsr, %0" :: "r" (__fcsr)) #endif #ifdef __riscv_float_abi_soft int feclearexcept(int __excepts); int fegetexceptflag(fexcept_t *__flagp, int __excepts); int fesetexceptflag(const fexcept_t *__flagp, int __excepts); int feraiseexcept(int __excepts); int fetestexcept(int __excepts); int fegetround(void); int fesetround(int __round); int fegetenv(fenv_t *__envp); int feholdexcept(fenv_t *__envp); int fesetenv(const fenv_t *__envp); int feupdateenv(const fenv_t *__envp); #else __fenv_static inline int feclearexcept(int __excepts) { __asm __volatile("csrc fflags, %0" :: "r"(__excepts)); return (0); } __fenv_static inline int fegetexceptflag(fexcept_t *__flagp, int __excepts) { fexcept_t __fcsr; __rfs(__fcsr); *__flagp = __fcsr & __excepts; return (0); } __fenv_static inline int fesetexceptflag(const fexcept_t *__flagp, int __excepts) { fexcept_t __fcsr; __fcsr = *__flagp; __asm __volatile("csrc fflags, %0" :: "r"(__excepts)); __asm __volatile("csrs fflags, %0" :: "r"(__fcsr & __excepts)); return (0); } __fenv_static inline int feraiseexcept(int __excepts) { __asm __volatile("csrs fflags, %0" :: "r"(__excepts)); return (0); } __fenv_static inline int fetestexcept(int __excepts) { fexcept_t __fcsr; __rfs(__fcsr); return (__fcsr & __excepts); } __fenv_static inline int fegetround(void) { fexcept_t __fcsr; __rfs(__fcsr); return (__fcsr & _ROUND_MASK); } __fenv_static inline int fesetround(int __round) { fexcept_t __fcsr; if (__round & ~_ROUND_MASK) return (-1); __rfs(__fcsr); __fcsr &= ~_ROUND_MASK; __fcsr |= __round; __wfs(__fcsr); return (0); } __fenv_static inline int fegetenv(fenv_t *__envp) { __rfs(*__envp); return (0); } __fenv_static inline int feholdexcept(fenv_t *__envp) { /* No exception traps. */ return (-1); } __fenv_static inline int fesetenv(const fenv_t *__envp) { __wfs(*__envp); return (0); } __fenv_static inline int feupdateenv(const fenv_t *__envp) { fexcept_t __fcsr; __rfs(__fcsr); __wfs(*__envp); feraiseexcept(__fcsr & FE_ALL_EXCEPT); return (0); } #endif /* !__riscv_float_abi_soft */ #if __BSD_VISIBLE /* We currently provide no external definitions of the functions below. */ #ifdef __riscv_float_abi_soft int feenableexcept(int __mask); int fedisableexcept(int __mask); int fegetexcept(void); #else static inline int feenableexcept(int __mask) { /* No exception traps. */ return (-1); } static inline int fedisableexcept(int __mask) { /* No exception traps. */ return (0); } static inline int fegetexcept(void) { /* No exception traps. */ return (0); } #endif /* !__riscv_float_abi_soft */ #endif /* __BSD_VISIBLE */ __END_DECLS #endif /* !_FENV_H_ */
Upload File
Create Folder