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Diffstat (limited to 'sysdeps/mips/math_private.h')
| -rw-r--r-- | sysdeps/mips/math_private.h | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/sysdeps/mips/math_private.h b/sysdeps/mips/math_private.h new file mode 100644 index 0000000000..95f438581b --- /dev/null +++ b/sysdeps/mips/math_private.h @@ -0,0 +1,139 @@ +/* Internal math stuff. MIPS version. + Copyright (C) 2013-2014 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 _MATH_PRIVATE_H + +#ifdef __mips_nan2008 +/* MIPS aligned to IEEE 754-2008. */ +#else +/* One of the few architectures where the meaning of the quiet/signaling bit is + inverse to IEEE 754-2008 (as well as common practice for IEEE 754-1985). */ +# define HIGH_ORDER_BIT_IS_SET_FOR_SNAN +#endif + +/* Inline functions to speed up the math library implementation. The + default versions of these routines are in generic/math_private.h + and call fesetround, feholdexcept, etc. These routines use inlined + code instead. */ + +#ifdef __mips_hard_float + +# include <fenv.h> +# include <fenv_libc.h> +# include <fpu_control.h> + +static __always_inline void +libc_feholdexcept_mips (fenv_t *envp) +{ + fpu_control_t cw; + + /* Save the current state. */ + _FPU_GETCW (cw); + envp->__fp_control_register = cw; + + /* Clear all exception enable bits and flags. */ + cw &= ~(_FPU_MASK_V|_FPU_MASK_Z|_FPU_MASK_O|_FPU_MASK_U|_FPU_MASK_I|FE_ALL_EXCEPT); + _FPU_SETCW (cw); +} +# define libc_feholdexcept libc_feholdexcept_mips +# define libc_feholdexceptf libc_feholdexcept_mips +# define libc_feholdexceptl libc_feholdexcept_mips + +static __always_inline void +libc_fesetround_mips (int round) +{ + fpu_control_t cw; + + /* Get current state. */ + _FPU_GETCW (cw); + + /* Set rounding bits. */ + cw &= ~_FPU_RC_MASK; + cw |= round; + + /* Set new state. */ + _FPU_SETCW (cw); +} +# define libc_fesetround libc_fesetround_mips +# define libc_fesetroundf libc_fesetround_mips +# define libc_fesetroundl libc_fesetround_mips + +static __always_inline void +libc_feholdexcept_setround_mips (fenv_t *envp, int round) +{ + fpu_control_t cw; + + /* Save the current state. */ + _FPU_GETCW (cw); + envp->__fp_control_register = cw; + + /* Clear all exception enable bits and flags. */ + cw &= ~(_FPU_MASK_V|_FPU_MASK_Z|_FPU_MASK_O|_FPU_MASK_U|_FPU_MASK_I|FE_ALL_EXCEPT); + + /* Set rounding bits. */ + cw &= ~_FPU_RC_MASK; + cw |= round; + + /* Set new state. */ + _FPU_SETCW (cw); +} +# define libc_feholdexcept_setround libc_feholdexcept_setround_mips +# define libc_feholdexcept_setroundf libc_feholdexcept_setround_mips +# define libc_feholdexcept_setroundl libc_feholdexcept_setround_mips + +static __always_inline void +libc_fesetenv_mips (fenv_t *envp) +{ + fpu_control_t cw; + + /* Read current state to flush fpu pipeline. */ + _FPU_GETCW (cw); + + _FPU_SETCW (envp->__fp_control_register); +} +# define libc_fesetenv libc_fesetenv_mips +# define libc_fesetenvf libc_fesetenv_mips +# define libc_fesetenvl libc_fesetenv_mips + +static __always_inline void +libc_feupdateenv_mips (fenv_t *envp) +{ + int temp; + + /* Save current exceptions. */ + _FPU_GETCW (temp); + + /* Set flag bits (which are accumulative), and *also* set the + cause bits. The setting of the cause bits is what actually causes + the hardware to generate the exception, if the corresponding enable + bit is set as well. */ + temp &= FE_ALL_EXCEPT; + temp |= envp->__fp_control_register | (temp << CAUSE_SHIFT); + + /* Set new state. */ + _FPU_SETCW (temp); +} +# define libc_feupdateenv libc_feupdateenv_mips +# define libc_feupdateenvf libc_feupdateenv_mips +# define libc_feupdateenvl libc_feupdateenv_mips + +#endif + +#include_next <math_private.h> + +#endif |