diff options
Diffstat (limited to 'libm')
55 files changed, 2466 insertions, 25 deletions
diff --git a/libm/arc/Makefile.arch b/libm/arc/Makefile.arch new file mode 100644 index 000000000..bd38690be --- /dev/null +++ b/libm/arc/Makefile.arch @@ -0,0 +1,16 @@ +# Makefile for uClibc-ng +# Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball. + +ifeq ($(UCLIBC_HAS_FENV),y) +libm_ARCH_SRC:=$(wildcard $(libm_ARCH_DIR)/*.c) +libm_ARCH_OBJ:=$(patsubst $(libm_ARCH_DIR)/%.c,$(libm_ARCH_OUT)/%.o,$(libm_ARCH_SRC)) +endif + +libm_ARCH_OBJS:=$(libm_ARCH_OBJ) + +ifeq ($(DOPIC),y) +libm-a-y+=$(libm_ARCH_OBJS:.o=.os) +else +libm-a-y+=$(libm_ARCH_OBJS) +endif +libm-so-y+=$(libm_ARCH_OBJS:.o=.os) diff --git a/libm/arc/fclrexcpt.c b/libm/arc/fclrexcpt.c new file mode 100644 index 000000000..76631657d --- /dev/null +++ b/libm/arc/fclrexcpt.c @@ -0,0 +1,34 @@ +/* Clear given exceptions in current floating-point environment. + Copyright (C) 2020-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include <fpu_control.h> + +int +feclearexcept (int excepts) +{ + unsigned int fpsr; + + _FPU_GETS (fpsr); + + /* Clear the relevant bits, FWE is preserved. */ + fpsr &= ~excepts; + + _FPU_SETS (fpsr); + + return 0; +} diff --git a/libm/arc/fegetenv.c b/libm/arc/fegetenv.c new file mode 100644 index 000000000..ad332c3e5 --- /dev/null +++ b/libm/arc/fegetenv.c @@ -0,0 +1,33 @@ +/* Store current floating-point environment. + Copyright (C) 2020-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include <fpu_control.h> + +int +fegetenv (fenv_t *envp) +{ + unsigned int fpcr; + unsigned int fpsr; + + _FPU_GETCW (fpcr); + _FPU_GETS (fpsr); + envp->__fpcr = fpcr; + envp->__fpsr = fpsr; + + return 0; +} diff --git a/libm/arc/fegetmode.c b/libm/arc/fegetmode.c new file mode 100644 index 000000000..e6aebbc87 --- /dev/null +++ b/libm/arc/fegetmode.c @@ -0,0 +1,30 @@ +/* Store current floating-point control modes. + Copyright (C) 2020-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include <fpu_control.h> + +int +fegetmode (femode_t *modep) +{ + unsigned int fpcr; + + _FPU_GETCW (fpcr); + *modep = fpcr; + + return 0; +} diff --git a/libm/arc/fegetround.c b/libm/arc/fegetround.c new file mode 100644 index 000000000..4dc476a7c --- /dev/null +++ b/libm/arc/fegetround.c @@ -0,0 +1,28 @@ +/* Return current rounding direction. + Copyright (C) 2020-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include "fenv_private.h" + +int +fegetround (void) +{ + unsigned int fpcr; + _FPU_GETCW (fpcr); + + return (fpcr >> __FPU_RND_SHIFT) & __FPU_RND_MASK; +} diff --git a/libm/arc/feholdexcpt.c b/libm/arc/feholdexcpt.c new file mode 100644 index 000000000..8febc7508 --- /dev/null +++ b/libm/arc/feholdexcpt.c @@ -0,0 +1,39 @@ +/* Store current floating-point environment and clear exceptions. + Copyright (C) 2020-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include "fenv_private.h" + +int +feholdexcept (fenv_t *envp) +{ + unsigned int fpcr; + unsigned int fpsr; + + _FPU_GETCW (fpcr); + _FPU_GETS (fpsr); + + envp->__fpcr = fpcr; + envp->__fpsr = fpsr; + + fpsr &= ~FE_ALL_EXCEPT; + + _FPU_SETCW (fpcr); + _FPU_SETS (fpsr); + + return 0; +} diff --git a/libm/arc/fenv_private.h b/libm/arc/fenv_private.h new file mode 100644 index 000000000..5f74c5e13 --- /dev/null +++ b/libm/arc/fenv_private.h @@ -0,0 +1,326 @@ +/* Optimized inline fenv.h functions for libm. Generic version. + Copyright (C) 2011-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#ifndef _FENV_PRIVATE_H +#define _FENV_PRIVATE_H 1 + +#include <fenv.h> +#include "get-rounding-mode.h" + +/* The standards only specify one variant of the fenv.h interfaces. + But at least for some architectures we can be more efficient if we + know what operations are going to be performed. Therefore we + define additional interfaces. By default they refer to the normal + interfaces. */ + +static __always_inline void +default_libc_feholdexcept (fenv_t *e) +{ + (void) feholdexcept (e); +} + +#ifndef libc_feholdexcept +# define libc_feholdexcept default_libc_feholdexcept +#endif +#ifndef libc_feholdexceptf +# define libc_feholdexceptf default_libc_feholdexcept +#endif +#ifndef libc_feholdexceptl +# define libc_feholdexceptl default_libc_feholdexcept +#endif + +static __always_inline void +default_libc_fesetround (int r) +{ + (void) fesetround (r); +} + +#ifndef libc_fesetround +# define libc_fesetround default_libc_fesetround +#endif +#ifndef libc_fesetroundf +# define libc_fesetroundf default_libc_fesetround +#endif +#ifndef libc_fesetroundl +# define libc_fesetroundl default_libc_fesetround +#endif + +static __always_inline void +default_libc_feholdexcept_setround (fenv_t *e, int r) +{ + feholdexcept (e); + fesetround (r); +} + +#ifndef libc_feholdexcept_setround +# define libc_feholdexcept_setround default_libc_feholdexcept_setround +#endif +#ifndef libc_feholdexcept_setroundf +# define libc_feholdexcept_setroundf default_libc_feholdexcept_setround +#endif +#ifndef libc_feholdexcept_setroundl +# define libc_feholdexcept_setroundl default_libc_feholdexcept_setround +#endif + +#ifndef libc_feholdsetround_53bit +# define libc_feholdsetround_53bit libc_feholdsetround +#endif + +#ifndef libc_fetestexcept +# define libc_fetestexcept fetestexcept +#endif +#ifndef libc_fetestexceptf +# define libc_fetestexceptf fetestexcept +#endif +#ifndef libc_fetestexceptl +# define libc_fetestexceptl fetestexcept +#endif + +static __always_inline void +default_libc_fesetenv (fenv_t *e) +{ + (void) fesetenv (e); +} + +#ifndef libc_fesetenv +# define libc_fesetenv default_libc_fesetenv +#endif +#ifndef libc_fesetenvf +# define libc_fesetenvf default_libc_fesetenv +#endif +#ifndef libc_fesetenvl +# define libc_fesetenvl default_libc_fesetenv +#endif + +static __always_inline void +default_libc_feupdateenv (fenv_t *e) +{ + (void) feupdateenv (e); +} + +#ifndef libc_feupdateenv +# define libc_feupdateenv default_libc_feupdateenv +#endif +#ifndef libc_feupdateenvf +# define libc_feupdateenvf default_libc_feupdateenv +#endif +#ifndef libc_feupdateenvl +# define libc_feupdateenvl default_libc_feupdateenv +#endif + +#ifndef libc_feresetround_53bit +# define libc_feresetround_53bit libc_feresetround +#endif + +static __always_inline int +default_libc_feupdateenv_test (fenv_t *e, int ex) +{ + int ret = fetestexcept (ex); + feupdateenv (e); + return ret; +} + +#ifndef libc_feupdateenv_test +# define libc_feupdateenv_test default_libc_feupdateenv_test +#endif +#ifndef libc_feupdateenv_testf +# define libc_feupdateenv_testf default_libc_feupdateenv_test +#endif +#ifndef libc_feupdateenv_testl +# define libc_feupdateenv_testl default_libc_feupdateenv_test +#endif + +/* Save and set the rounding mode. The use of fenv_t to store the old mode + allows a target-specific version of this function to avoid converting the + rounding mode from the fpu format. By default we have no choice but to + manipulate the entire env. */ + +#ifndef libc_feholdsetround +# define libc_feholdsetround libc_feholdexcept_setround +#endif +#ifndef libc_feholdsetroundf +# define libc_feholdsetroundf libc_feholdexcept_setroundf +#endif +#ifndef libc_feholdsetroundl +# define libc_feholdsetroundl libc_feholdexcept_setroundl +#endif + +/* ... and the reverse. */ + +#ifndef libc_feresetround +# define libc_feresetround libc_feupdateenv +#endif +#ifndef libc_feresetroundf +# define libc_feresetroundf libc_feupdateenvf +#endif +#ifndef libc_feresetroundl +# define libc_feresetroundl libc_feupdateenvl +#endif + +/* ... and a version that also discards exceptions. */ + +#ifndef libc_feresetround_noex +# define libc_feresetround_noex libc_fesetenv +#endif +#ifndef libc_feresetround_noexf +# define libc_feresetround_noexf libc_fesetenvf +#endif +#ifndef libc_feresetround_noexl +# define libc_feresetround_noexl libc_fesetenvl +#endif + +#ifndef HAVE_RM_CTX +# define HAVE_RM_CTX 0 +#endif + + +/* Default implementation using standard fenv functions. + Avoid unnecessary rounding mode changes by first checking the + current rounding mode. Note the use of unlikely is + important for performance. */ + +static __always_inline void +default_libc_feholdsetround_ctx (struct rm_ctx *ctx, int round) +{ + ctx->updated_status = false; + + /* Update rounding mode only if different. */ + if (unlikely (round != get_rounding_mode ())) + { + ctx->updated_status = true; + fegetenv (&ctx->env); + fesetround (round); + } +} + +static __always_inline void +default_libc_feresetround_ctx (struct rm_ctx *ctx) +{ + /* Restore the rounding mode if updated. */ + if (unlikely (ctx->updated_status)) + feupdateenv (&ctx->env); +} + +static __always_inline void +default_libc_feholdsetround_noex_ctx (struct rm_ctx *ctx, int round) +{ + /* Save exception flags and rounding mode, and disable exception + traps. */ + feholdexcept (&ctx->env); + + /* Update rounding mode only if different. */ + if (unlikely (round != get_rounding_mode ())) + fesetround (round); +} + +static __always_inline void +default_libc_feresetround_noex_ctx (struct rm_ctx *ctx) +{ + /* Restore exception flags and rounding mode. */ + fesetenv (&ctx->env); +} + +#if HAVE_RM_CTX +/* Set/Restore Rounding Modes only when necessary. If defined, these functions + set/restore floating point state only if the state needed within the lexical + block is different from the current state. This saves a lot of time when + the floating point unit is much slower than the fixed point units. */ + +# ifndef libc_feholdsetround_noex_ctx +# define libc_feholdsetround_noex_ctx libc_feholdsetround_ctx +# endif +# ifndef libc_feholdsetround_noexf_ctx +# define libc_feholdsetround_noexf_ctx libc_feholdsetroundf_ctx +# endif +# ifndef libc_feholdsetround_noexl_ctx +# define libc_feholdsetround_noexl_ctx libc_feholdsetroundl_ctx +# endif + +# ifndef libc_feresetround_noex_ctx +# define libc_feresetround_noex_ctx libc_fesetenv_ctx +# endif +# ifndef libc_feresetround_noexf_ctx +# define libc_feresetround_noexf_ctx libc_fesetenvf_ctx +# endif +# ifndef libc_feresetround_noexl_ctx +# define libc_feresetround_noexl_ctx libc_fesetenvl_ctx +# endif + +#else + +# define libc_feholdsetround_ctx default_libc_feholdsetround_ctx +# define libc_feresetround_ctx default_libc_feresetround_ctx +# define libc_feholdsetround_noex_ctx default_libc_feholdsetround_noex_ctx +# define libc_feresetround_noex_ctx default_libc_feresetround_noex_ctx + +# define libc_feholdsetroundf_ctx libc_feholdsetround_ctx +# define libc_feholdsetroundl_ctx libc_feholdsetround_ctx +# define libc_feresetroundf_ctx libc_feresetround_ctx +# define libc_feresetroundl_ctx libc_feresetround_ctx + +# define libc_feholdsetround_noexf_ctx libc_feholdsetround_noex_ctx +# define libc_feholdsetround_noexl_ctx libc_feholdsetround_noex_ctx +# define libc_feresetround_noexf_ctx libc_feresetround_noex_ctx +# define libc_feresetround_noexl_ctx libc_feresetround_noex_ctx + +#endif + +#ifndef libc_feholdsetround_53bit_ctx +# define libc_feholdsetround_53bit_ctx libc_feholdsetround_ctx +#endif +#ifndef libc_feresetround_53bit_ctx +# define libc_feresetround_53bit_ctx libc_feresetround_ctx +#endif + +#define SET_RESTORE_ROUND_GENERIC(RM,ROUNDFUNC,CLEANUPFUNC) \ + struct rm_ctx ctx __attribute__((cleanup (CLEANUPFUNC ## _ctx))); \ + ROUNDFUNC ## _ctx (&ctx, (RM)) + +/* Set the rounding mode within a lexical block. Restore the rounding mode to + the value at the start of the block. The exception mode must be preserved. + Exceptions raised within the block must be set in the exception flags. + Non-stop mode may be enabled inside the block. */ + +#define SET_RESTORE_ROUND(RM) \ + SET_RESTORE_ROUND_GENERIC (RM, libc_feholdsetround, libc_feresetround) +#define SET_RESTORE_ROUNDF(RM) \ + SET_RESTORE_ROUND_GENERIC (RM, libc_feholdsetroundf, libc_feresetroundf) +#define SET_RESTORE_ROUNDL(RM) \ + SET_RESTORE_ROUND_GENERIC (RM, libc_feholdsetroundl, libc_feresetroundl) + +/* Set the rounding mode within a lexical block. Restore the rounding mode to + the value at the start of the block. The exception mode must be preserved. + Exceptions raised within the block must be discarded, and exception flags + are restored to the value at the start of the block. + Non-stop mode must be enabled inside the block. */ + +#define SET_RESTORE_ROUND_NOEX(RM) \ + SET_RESTORE_ROUND_GENERIC (RM, libc_feholdsetround_noex, \ + libc_feresetround_noex) +#define SET_RESTORE_ROUND_NOEXF(RM) \ + SET_RESTORE_ROUND_GENERIC (RM, libc_feholdsetround_noexf, \ + libc_feresetround_noexf) +#define SET_RESTORE_ROUND_NOEXL(RM) \ + SET_RESTORE_ROUND_GENERIC (RM, libc_feholdsetround_noexl, \ + libc_feresetround_noexl) + +/* Like SET_RESTORE_ROUND, but also set rounding precision to 53 bits. */ +#define SET_RESTORE_ROUND_53BIT(RM) \ + SET_RESTORE_ROUND_GENERIC (RM, libc_feholdsetround_53bit, \ + libc_feresetround_53bit) + +#endif /* fenv_private.h. */ diff --git a/libm/arc/fesetenv.c b/libm/arc/fesetenv.c new file mode 100644 index 000000000..59ec3b722 --- /dev/null +++ b/libm/arc/fesetenv.c @@ -0,0 +1,44 @@ +/* Install given floating-point environment (does not raise exceptions). + Copyright (C) 2020-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include "fpu_control.h" + +int +fesetenv (const fenv_t *envp) +{ + unsigned int fpcr; + unsigned int fpsr; + + if (envp == FE_DFL_ENV) + { + fpcr = _FPU_DEFAULT; + fpsr = _FPU_FPSR_DEFAULT; + } + else + { + /* No need to mask out reserved bits as they are IoW. */ + fpcr = envp->__fpcr; + fpsr = envp->__fpsr; + } + + _FPU_SETCW (fpcr); + _FPU_SETS (fpsr); + + /* Success. */ + return 0; +} diff --git a/libm/arc/fesetexcept.c b/libm/arc/fesetexcept.c new file mode 100644 index 000000000..3756a2e09 --- /dev/null +++ b/libm/arc/fesetexcept.c @@ -0,0 +1,31 @@ +/* Set given exception flags. + Copyright (C) 2020-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include "fpu_control.h" + +int +fesetexcept (int excepts) +{ + unsigned int fpsr; + + _FPU_GETS (fpsr); + fpsr |= excepts; + _FPU_SETS (fpsr); + + return 0; +} diff --git a/libm/arc/fesetmode.c b/libm/arc/fesetmode.c new file mode 100644 index 000000000..1fc2bdf12 --- /dev/null +++ b/libm/arc/fesetmode.c @@ -0,0 +1,39 @@ +/* Install given floating-point control modes. + Copyright (C) 2020-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include "fpu_control.h" + +int +fesetmode (const femode_t *modep) +{ + unsigned int fpcr; + + if (modep == FE_DFL_MODE) + { + fpcr = _FPU_DEFAULT; + } + else + { + /* No need to mask out reserved bits as they are IoW. */ + fpcr = *modep; + } + + _FPU_SETCW (fpcr); + + return 0; +} diff --git a/libm/arc/fesetround.c b/libm/arc/fesetround.c new file mode 100644 index 000000000..e156e9cf5 --- /dev/null +++ b/libm/arc/fesetround.c @@ -0,0 +1,36 @@ +/* Set current rounding direction. + Copyright (C) 2020-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include "fenv_private.h" + +int +fesetround (int round) +{ + unsigned int fpcr; + + _FPU_GETCW (fpcr); + + if (((fpcr >> __FPU_RND_SHIFT) & __FPU_RND_MASK) != round) + { + fpcr &= ~(__FPU_RND_MASK << __FPU_RND_SHIFT); + fpcr |= (round & __FPU_RND_MASK) << __FPU_RND_SHIFT; + _FPU_SETCW (fpcr); + } + + return 0; +} diff --git a/libm/arc/feupdateenv.c b/libm/arc/feupdateenv.c new file mode 100644 index 000000000..6a59b2bfe --- /dev/null +++ b/libm/arc/feupdateenv.c @@ -0,0 +1,47 @@ +/* Install given floating-point environment and raise exceptions, + without clearing currently raised exceptions. + Copyright (C) 2020-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include "fpu_control.h" + +int +feupdateenv (const fenv_t *envp) +{ + unsigned int fpcr; + unsigned int fpsr; + + _FPU_GETS (fpsr); + + if (envp == FE_DFL_ENV) + { + fpcr = _FPU_DEFAULT; + } + else + { + fpcr = envp->__fpcr; + + /* currently raised exceptions need to be preserved. */ + fpsr |= envp->__fpsr; + } + + _FPU_SETCW (fpcr); + _FPU_SETS (fpsr); + + /* Success. */ + return 0; +} diff --git a/libm/arc/fgetexcptflg.c b/libm/arc/fgetexcptflg.c new file mode 100644 index 000000000..03f97f99f --- /dev/null +++ b/libm/arc/fgetexcptflg.c @@ -0,0 +1,30 @@ +/* Store current representation for exceptions, ARC version. + Copyright (C) 2020-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include "fenv_private.h" + +int +fegetexceptflag (fexcept_t *flagp, int excepts) +{ + unsigned int fpsr; + + _FPU_GETS (fpsr); + *flagp = fpsr & excepts; + + return 0; +} diff --git a/libm/arc/fraiseexcpt.c b/libm/arc/fraiseexcpt.c new file mode 100644 index 000000000..2ff5e0269 --- /dev/null +++ b/libm/arc/fraiseexcpt.c @@ -0,0 +1,35 @@ +/* Raise given exceptions. + Copyright (C) 2020-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include <fpu_control.h> +#include <float.h> +#include <math.h> + +int +feraiseexcept (int excepts) +{ + unsigned int fpsr; + + /* currently raised exceptions are not cleared. */ + _FPU_GETS (fpsr); + fpsr |= excepts; + + _FPU_SETS (fpsr); + + return 0; +} diff --git a/libm/arc/fsetexcptflg.c b/libm/arc/fsetexcptflg.c new file mode 100644 index 000000000..97ff20fff --- /dev/null +++ b/libm/arc/fsetexcptflg.c @@ -0,0 +1,37 @@ +/* Set floating-point environment exception handling, ARC version. + Copyright (C) 2020-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include <fpu_control.h> + +int +fesetexceptflag (const fexcept_t *flagp, int excepts) +{ + unsigned int fpsr; + + _FPU_GETS (fpsr); + + /* Clear the bits first. */ + fpsr &= ~excepts; + + /* Now set those bits, copying them over from @flagp. */ + fpsr |= *flagp & excepts; + + _FPU_SETS (fpsr); + + return 0; +} diff --git a/libm/arc/ftestexcept.c b/libm/arc/ftestexcept.c new file mode 100644 index 000000000..ccc557e5e --- /dev/null +++ b/libm/arc/ftestexcept.c @@ -0,0 +1,31 @@ +/* Test exception in current environment. + Copyright (C) 2020-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include <fpu_control.h> +#include "fenv_private.h" +#include <stdio.h> + +int +fetestexcept (int excepts) +{ + unsigned int fpsr; + + _FPU_GETS (fpsr); + + return fpsr & excepts; +} diff --git a/libm/arc/get-rounding-mode.h b/libm/arc/get-rounding-mode.h new file mode 100644 index 000000000..d1bf3475d --- /dev/null +++ b/libm/arc/get-rounding-mode.h @@ -0,0 +1,37 @@ +/* Determine floating-point rounding mode within libc. ARC version. + Copyright (C) 2020-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#ifndef _ARC_GET_ROUNDING_MODE_H +#define _ARC_GET_ROUNDING_MODE_H 1 + +#include <fenv.h> +#include <fpu_control.h> + +static inline int +get_rounding_mode (void) +{ +#if defined(__ARC_FPU_SP__) || defined(__ARC_FPU_DP__) + unsigned int fpcr; + _FPU_GETCW (fpcr); + + return (fpcr >> __FPU_RND_SHIFT) & __FPU_RND_MASK; +#else + return FE_TONEAREST; +#endif +} + +#endif /* get-rounding-mode.h */ diff --git a/libm/csky/Makefile.arch b/libm/csky/Makefile.arch new file mode 100644 index 000000000..bd38690be --- /dev/null +++ b/libm/csky/Makefile.arch @@ -0,0 +1,16 @@ +# Makefile for uClibc-ng +# Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball. + +ifeq ($(UCLIBC_HAS_FENV),y) +libm_ARCH_SRC:=$(wildcard $(libm_ARCH_DIR)/*.c) +libm_ARCH_OBJ:=$(patsubst $(libm_ARCH_DIR)/%.c,$(libm_ARCH_OUT)/%.o,$(libm_ARCH_SRC)) +endif + +libm_ARCH_OBJS:=$(libm_ARCH_OBJ) + +ifeq ($(DOPIC),y) +libm-a-y+=$(libm_ARCH_OBJS:.o=.os) +else +libm-a-y+=$(libm_ARCH_OBJS) +endif +libm-so-y+=$(libm_ARCH_OBJS:.o=.os) diff --git a/libm/csky/fclrexcpt.c b/libm/csky/fclrexcpt.c new file mode 100644 index 000000000..8f8acef16 --- /dev/null +++ b/libm/csky/fclrexcpt.c @@ -0,0 +1,40 @@ +/* Clear given exceptions in current floating-point environment. + Copyright (C) 2018-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include "fenv_libc.h" +#include <fpu_control.h> + +int +feclearexcept (int excepts) +{ + int fpsr; + + /* Mask out unsupported bits/exceptions. */ + excepts &= FE_ALL_EXCEPT; + + /* Read the complete control word. */ + _FPU_GETFPSR (fpsr); + + /* Clear the relevant bits. */ + fpsr &= ~(excepts | (excepts << CAUSE_SHIFT)); + + /* Put the new data in effect. */ + _FPU_SETFPSR (fpsr); + + return 0; +} diff --git a/libm/csky/fedisblxcpt.c b/libm/csky/fedisblxcpt.c new file mode 100644 index 000000000..e518968ab --- /dev/null +++ b/libm/csky/fedisblxcpt.c @@ -0,0 +1,40 @@ +/* Disable floating-point exceptions. + Copyright (C) 2018-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include "fenv_libc.h" +#include <fpu_control.h> + +int +fedisableexcept (int excepts) +{ + unsigned int new_exc, old_exc; + + /* Get the current control word. */ + _FPU_GETCW (new_exc); + + old_exc = (new_exc & ENABLE_MASK) >> ENABLE_SHIFT; + + /* Get the except disable mask. */ + excepts &= FE_ALL_EXCEPT; + new_exc &= ~(excepts << ENABLE_SHIFT); + + /* Put the new data in effect. */ + _FPU_SETCW (new_exc); + + return old_exc; +} diff --git a/libm/csky/feenablxcpt.c b/libm/csky/feenablxcpt.c new file mode 100644 index 000000000..90c495080 --- /dev/null +++ b/libm/csky/feenablxcpt.c @@ -0,0 +1,39 @@ +/* Enable floating-point exceptions. + Copyright (C) 2018-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include "fenv_libc.h" +#include <fpu_control.h> + +int +feenableexcept (int excepts) +{ + unsigned int new_exc, old_exc; + + /* Get the current control word. */ + _FPU_GETCW (new_exc); + + old_exc = (new_exc & ENABLE_MASK) >> ENABLE_SHIFT; + + excepts &= FE_ALL_EXCEPT; + + new_exc |= excepts << ENABLE_SHIFT; + + _FPU_SETCW (new_exc); + + return old_exc; +} diff --git a/libm/csky/fegetenv.c b/libm/csky/fegetenv.c new file mode 100644 index 000000000..d98982fc1 --- /dev/null +++ b/libm/csky/fegetenv.c @@ -0,0 +1,33 @@ +/* Store current floating-point environment. + Copyright (C) 2018-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include <fpu_control.h> + +int +fegetenv (fenv_t *envp) +{ + unsigned int fpcr; + unsigned int fpsr; + + _FPU_GETCW (fpcr); + _FPU_GETFPSR (fpsr); + envp->__fpcr = fpcr; + envp->__fpsr = fpsr; + + return 0; +} diff --git a/libm/csky/fegetexcept.c b/libm/csky/fegetexcept.c new file mode 100644 index 000000000..339f35923 --- /dev/null +++ b/libm/csky/fegetexcept.c @@ -0,0 +1,31 @@ +/* Get enabled floating-point exceptions. + Copyright (C) 2018-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include "fenv_libc.h" +#include <fpu_control.h> + +int +fegetexcept (void) +{ + unsigned int exc; + + /* Get the current control word. */ + _FPU_GETCW (exc); + + return (exc & ENABLE_MASK) >> ENABLE_SHIFT; +} diff --git a/libm/csky/fegetmode.c b/libm/csky/fegetmode.c new file mode 100644 index 000000000..09d8282dd --- /dev/null +++ b/libm/csky/fegetmode.c @@ -0,0 +1,27 @@ +/* Store current floating-point control modes. + Copyright (C) 2018-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include <fpu_control.h> + +int +fegetmode (femode_t *modep) +{ + _FPU_GETCW (*modep); + + return 0; +} diff --git a/libm/csky/fegetround.c b/libm/csky/fegetround.c new file mode 100644 index 000000000..e68775af3 --- /dev/null +++ b/libm/csky/fegetround.c @@ -0,0 +1,30 @@ +/* Return current rounding direction. + Copyright (C) 2018-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include <fpu_control.h> + +int +fegetround (void) +{ + unsigned int cw; + + /* Get control word. */ + _FPU_GETCW (cw); + + return cw & __FE_ROUND_MASK; +} diff --git a/libm/csky/feholdexcpt.c b/libm/csky/feholdexcpt.c new file mode 100644 index 000000000..456af5eb1 --- /dev/null +++ b/libm/csky/feholdexcpt.c @@ -0,0 +1,30 @@ +/* Store current floating-point environment and clear exceptions. + Copyright (C) 2018-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include <fpu_control.h> +#include "fenv_libc.h" +#include "fenv_private.h" + +#include <stdio.h> + +int +feholdexcept (fenv_t *envp) +{ + libc_feholdexcept_vfp (envp); + return 0; +} diff --git a/libm/csky/fenv_libc.h b/libm/csky/fenv_libc.h new file mode 100644 index 000000000..44e89812d --- /dev/null +++ b/libm/csky/fenv_libc.h @@ -0,0 +1,29 @@ +/* fpu registers environment. C-SKY version. + Copyright (C) 2018-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#ifndef _FENV_LIBC_H +#define _FENV_LIBC_H 1 + +/* Mask for enabling exceptions and for the CAUSE bits. */ +#define ENABLE_MASK 0x0003FU +#define CAUSE_MASK 0x3F000U + +/* Shift for FE_* flags to get up to the ENABLE bits and the CAUSE bits. */ +#define ENABLE_SHIFT 0 +#define CAUSE_SHIFT 8 + +#endif /* fenv_libc.h */ diff --git a/libm/csky/fenv_private.h b/libm/csky/fenv_private.h new file mode 100644 index 000000000..f0f48a88a --- /dev/null +++ b/libm/csky/fenv_private.h @@ -0,0 +1,277 @@ +/* Private floating point rounding and exceptions handling. C-SKY version. + Copyright (C) 2018-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#ifndef CSKY_FENV_PRIVATE_H +#define CSKY_FENV_PRIVATE_H 1 + +#include <fenv.h> +#include <fpu_control.h> +#include "fenv_libc.h" + +static __always_inline void +libc_feholdexcept_vfp (fenv_t *envp) +{ + fpu_control_t fpsr, fpcr; + + _FPU_GETCW (fpcr); + envp->__fpcr = fpcr; + + _FPU_GETFPSR (fpsr); + envp->__fpsr = fpsr; + + /* Now set all exceptions to non-stop. */ + fpcr &= ~FE_ALL_EXCEPT; + + /* And clear all exception flags. */ + fpsr &= ~(FE_ALL_EXCEPT << CAUSE_SHIFT); + + _FPU_SETFPSR (fpsr); + + _FPU_SETCW (fpcr); +} + +static __always_inline void +libc_fesetround_vfp (int round) +{ + fpu_control_t fpcr; + + _FPU_GETCW (fpcr); + + /* Set new rounding mode if different. */ + if (unlikely ((fpcr & FE_DOWNWARD) != round)) + _FPU_SETCW ((fpcr & ~FE_DOWNWARD) | round); +} + +static __always_inline void +libc_feholdexcept_setround_vfp (fenv_t *envp, int round) +{ + fpu_control_t fpsr, fpcr; + + _FPU_GETCW (fpcr); + envp->__fpcr = fpcr; + + _FPU_GETFPSR (fpsr); + envp->__fpsr = fpsr; + + /* Clear exception flags, set all exceptions to non-stop, + and set new rounding mode. */ + fpsr &= ~(FE_ALL_EXCEPT << CAUSE_SHIFT); + _FPU_SETFPSR (fpsr); + + fpcr &= ~(FE_ALL_EXCEPT | FE_DOWNWARD); + _FPU_SETCW (fpcr | round); +} + +static __always_inline void +libc_feholdsetround_vfp (fenv_t *envp, int round) +{ + fpu_control_t fpcr; + + _FPU_GETCW (fpcr); + envp->__fpcr = fpcr; + + /* Set new rounding mode if different. */ + if (unlikely ((fpcr & FE_DOWNWARD) != round)) + _FPU_SETCW ((fpcr & ~FE_DOWNWARD) | round); +} + +static __always_inline void +libc_feresetround_vfp (fenv_t *envp) +{ + fpu_control_t fpcr, round; + + _FPU_GETCW (fpcr); + + /* Check whether rounding modes are different. */ + round = (envp->__fpcr ^ fpcr) & FE_DOWNWARD; + + /* Restore the rounding mode if it was changed. */ + if (unlikely (round != 0)) + _FPU_SETCW (fpcr ^ round); +} + +static __always_inline int +libc_fetestexcept_vfp (int ex) +{ + fpu_control_t fpsr; + + _FPU_GETFPSR (fpsr); + fpsr = fpsr >> CAUSE_SHIFT; + return fpsr & ex & FE_ALL_EXCEPT; +} + +static __always_inline void +libc_fesetenv_vfp (const fenv_t *envp) +{ + fpu_control_t fpcr, fpsr, new_fpcr, new_fpsr; + + _FPU_GETCW (fpcr); + _FPU_GETFPSR (fpsr); + + new_fpcr = envp->__fpcr; + new_fpsr = envp->__fpsr; + + if (unlikely (fpsr ^ new_fpsr) != 0) + _FPU_SETFPSR (new_fpsr); + + if (unlikely (fpcr ^ new_fpcr) != 0) + _FPU_SETCW (new_fpcr); +} + +static __always_inline int +libc_feupdateenv_test_vfp (const fenv_t *envp, int ex) +{ + fpu_control_t fpcr, fpsr, new_fpcr, new_fpsr, excepts; + + _FPU_GETCW (fpcr); + _FPU_GETFPSR (fpsr); + + /* Merge current exception flags with the saved fenv. */ + excepts = (fpsr >> CAUSE_SHIFT) & FE_ALL_EXCEPT; + new_fpcr = envp->__fpcr; + new_fpsr = envp->__fpsr | (excepts << CAUSE_SHIFT); + + /* Write FCR and FESR if different. */ + if (unlikely (fpsr ^ new_fpsr) != 0) + _FPU_SETFPSR (new_fpsr); + + if (unlikely (fpcr ^ new_fpcr) != 0) + _FPU_SETCW (new_fpcr); + + /* Raise the exceptions if enabled in the new FP state. */ + if (unlikely (excepts & new_fpcr)) + feraiseexcept (excepts); + + return excepts & ex; +} + +static __always_inline void +libc_feupdateenv_vfp (const fenv_t *envp) +{ + libc_feupdateenv_test_vfp (envp, 0); +} + +static __always_inline void +libc_feholdsetround_vfp_ctx (struct rm_ctx *ctx, int r) +{ + fpu_control_t fpcr, fpsr, round; + + _FPU_GETCW (fpcr); + _FPU_GETFPSR (fpsr); + ctx->updated_status = false; + ctx->env.__fpcr = fpcr; + ctx->env.__fpsr = fpsr; + + /* Check whether rounding modes are different. */ + round = (fpcr ^ r) & FE_DOWNWARD; + + /* Set the rounding mode if changed. */ + if (unlikely (round != 0)) + { + ctx->updated_status = true; + _FPU_SETCW (fpcr ^ round); + } +} + +static __always_inline void +libc_feresetround_vfp_ctx (struct rm_ctx *ctx) +{ + /* Restore the rounding mode if updated. */ + if (unlikely (ctx->updated_status)) + { + fpu_control_t fpcr; + + _FPU_GETCW (fpcr); + fpcr = (fpcr & ~FE_DOWNWARD) | (ctx->env.__fpcr & FE_DOWNWARD); + _FPU_SETCW (fpcr); + } +} + +static __always_inline void +libc_fesetenv_vfp_ctx (struct rm_ctx *ctx) +{ + fpu_control_t fpcr, fpsr, new_fpcr, new_fpsr; + + _FPU_GETCW (fpcr); + _FPU_GETFPSR (fpsr); + + new_fpcr = ctx->env.__fpcr; + new_fpsr = ctx->env.__fpsr; + + if (unlikely (fpsr ^ new_fpsr) != 0) + _FPU_SETFPSR (new_fpsr); + + if (unlikely (fpcr ^ new_fpcr) != 0) + _FPU_SETCW (new_fpcr); +} + +#define libc_feholdexcept libc_feholdexcept_vfp +#define libc_feholdexceptf libc_feholdexcept_vfp +#define libc_feholdexceptl libc_feholdexcept_vfp + +#define libc_fesetround libc_fesetround_vfp +#define libc_fesetroundf libc_fesetround_vfp +#define libc_fesetroundl libc_fesetround_vfp + +#define libc_feresetround libc_feresetround_vfp +#define libc_feresetroundf libc_feresetround_vfp +#define libc_feresetroundl libc_feresetround_vfp + +#define libc_feresetround_noex libc_fesetenv_vfp +#define libc_feresetround_noexf libc_fesetenv_vfp +#define libc_feresetround_noexl libc_fesetenv_vfp + +#define libc_feholdexcept_setround libc_feholdexcept_setround_vfp +#define libc_feholdexcept_setroundf libc_feholdexcept_setround_vfp +#define libc_feholdexcept_setroundl libc_feholdexcept_setround_vfp + +#define libc_feholdsetround libc_feholdsetround_vfp +#define libc_feholdsetroundf libc_feholdsetround_vfp +#define libc_feholdsetroundl libc_feholdsetround_vfp + +#define libc_fetestexcept libc_fetestexcept_vfp +#define libc_fetestexceptf libc_fetestexcept_vfp +#define libc_fetestexceptl libc_fetestexcept_vfp + +#define libc_fesetenv libc_fesetenv_vfp +#define libc_fesetenvf libc_fesetenv_vfp +#define libc_fesetenvl libc_fesetenv_vfp + +#define libc_feupdateenv libc_feupdateenv_vfp +#define libc_feupdateenvf libc_feupdateenv_vfp +#define libc_feupdateenvl libc_feupdateenv_vfp + +#define libc_feupdateenv_test libc_feupdateenv_test_vfp +#define libc_feupdateenv_testf libc_feupdateenv_test_vfp +#define libc_feupdateenv_testl libc_feupdateenv_test_vfp + +/* We have support for rounding mode context. */ +#define HAVE_RM_CTX 1 + +#define libc_feholdsetround_ctx libc_feholdsetround_vfp_ctx +#define libc_feresetround_ctx libc_feresetround_vfp_ctx +#define libc_feresetround_noex_ctx libc_fesetenv_vfp_ctx + +#define libc_feholdsetroundf_ctx libc_feholdsetround_vfp_ctx +#define libc_feresetroundf_ctx libc_feresetround_vfp_ctx +#define libc_feresetround_noexf_ctx libc_fesetenv_vfp_ctx + +#define libc_feholdsetroundl_ctx libc_feholdsetround_vfp_ctx +#define libc_feresetroundl_ctx libc_feresetround_vfp_ctx +#define libc_feresetround_noexl_ctx libc_fesetenv_vfp_ctx + +#endif /* CSKY_FENV_PRIVATE_H */ diff --git a/libm/csky/fesetenv.c b/libm/csky/fesetenv.c new file mode 100644 index 000000000..96b961598 --- /dev/null +++ b/libm/csky/fesetenv.c @@ -0,0 +1,55 @@ +/* Install given floating-point environment. + Copyright (C) 2018-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include <fpu_control.h> + +int +fesetenv (const fenv_t *envp) +{ + unsigned int fpcr; + unsigned int fpsr; + + _FPU_GETCW (fpcr); + _FPU_GETFPSR (fpsr); + + fpcr &= _FPU_RESERVED; + fpsr &= _FPU_FPSR_RESERVED; + + if (envp == FE_DFL_ENV) + { + fpcr |= _FPU_DEFAULT; + fpsr |= _FPU_FPSR_DEFAULT; + } + else if (envp == FE_NOMASK_ENV) + { + fpcr |= _FPU_FPCR_IEEE; + fpsr |= _FPU_FPSR_IEEE; + } + else + { + fpcr |= envp->__fpcr & ~_FPU_RESERVED; + fpsr |= envp->__fpsr & ~_FPU_FPSR_RESERVED; + } + + _FPU_SETFPSR (fpsr); + + _FPU_SETCW (fpcr); + + /* Success. */ + return 0; +} diff --git a/libm/csky/fesetexcept.c b/libm/csky/fesetexcept.c new file mode 100644 index 000000000..940322197 --- /dev/null +++ b/libm/csky/fesetexcept.c @@ -0,0 +1,32 @@ +/* Set given exception flags. + Copyright (C) 2018-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include <fpu_control.h> +#include "fenv_libc.h" + +int +fesetexcept (int excepts) +{ + fpu_control_t fpsr, new_fpsr; + _FPU_GETFPSR (fpsr); + new_fpsr = fpsr | ((excepts & FE_ALL_EXCEPT) << CAUSE_SHIFT); + if (new_fpsr != fpsr) + _FPU_SETFPSR (new_fpsr); + + return 0; +} diff --git a/libm/csky/fesetmode.c b/libm/csky/fesetmode.c new file mode 100644 index 000000000..eddd2d401 --- /dev/null +++ b/libm/csky/fesetmode.c @@ -0,0 +1,32 @@ +/* Install given floating-point control modes. + Copyright (C) 2018-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include <fpu_control.h> + +int +fesetmode (const femode_t *modep) +{ + femode_t mode; + if (modep == FE_DFL_MODE) + mode = _FPU_DEFAULT; + else + mode = *modep; + _FPU_SETCW (mode); + + return 0; +} diff --git a/libm/csky/fesetround.c b/libm/csky/fesetround.c new file mode 100644 index 000000000..15a4b7c7e --- /dev/null +++ b/libm/csky/fesetround.c @@ -0,0 +1,28 @@ +/* Set current rounding direction. + Copyright (C) 2018-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include <fpu_control.h> +#include "fenv_private.h" + +#include <stdio.h> +int +fesetround (int round) +{ + libc_fesetround_vfp (round); + return 0; +} diff --git a/libm/csky/feupdateenv.c b/libm/csky/feupdateenv.c new file mode 100644 index 000000000..91e627ad2 --- /dev/null +++ b/libm/csky/feupdateenv.c @@ -0,0 +1,42 @@ +/* Install given floating-point environment and raise exceptions. + Copyright (C) 2018-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include <fpu_control.h> +#include "fenv_libc.h" +#include "fenv_private.h" +#include <stdio.h> + +int +feupdateenv (const fenv_t *envp) +{ + int temp; + + /* Save current exceptions. */ + _FPU_GETFPSR (temp); + temp = (temp >> CAUSE_SHIFT) & FE_ALL_EXCEPT; + /* Install new environment. */ + fesetenv (envp); + + /* Raise the saved exception. Incidentally for us the implementation + defined format of the values in objects of type fexcept_t is the + same as the ones specified using the FE_* constants. */ + feraiseexcept (temp); + + /* Success. */ + return 0; +} diff --git a/libm/csky/fgetexcptflg.c b/libm/csky/fgetexcptflg.c new file mode 100644 index 000000000..c400a2c1f --- /dev/null +++ b/libm/csky/fgetexcptflg.c @@ -0,0 +1,31 @@ +/* Store current representation for exceptions. + Copyright (C) 2018-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include <fpu_control.h> +#include "fenv_libc.h" +#include "fenv_private.h" +#include <stdio.h> + +int +fegetexceptflag (fexcept_t *flagp, int excepts) +{ + *flagp = libc_fetestexcept_vfp (excepts); + + /* Success. */ + return 0; +} diff --git a/libm/csky/fraiseexcpt.c b/libm/csky/fraiseexcpt.c new file mode 100644 index 000000000..31cd32f2c --- /dev/null +++ b/libm/csky/fraiseexcpt.c @@ -0,0 +1,122 @@ +/* Raise given exceptions. + Copyright (C) 2018-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include "fenv_libc.h" +#include <fpu_control.h> +#include <float.h> +#include <math.h> + +int +feraiseexcept (int excepts) +{ + /* Raise exceptions represented by EXCEPTS. But we must raise only one + signal at a time. It is important that if the overflow/underflow + exception and the divide by zero exception are given at the same + time, the overflow/underflow exception follows the divide by zero + exception. */ + +# ifndef __csky_fpuv1__ + /* First: invalid exception. */ + if (FE_INVALID & excepts) + { + /* One example of a invalid operation is 0 * Infinity. */ + float x = HUGE_VALF, y = 0.0f; + __asm__ __volatile__ ("fmuls %0, %0, %1" : "+v" (x) : "v" (y)); + } + + /* Next: division by zero. */ + if (FE_DIVBYZERO & excepts) + { + float x = 1.0f, y = 0.0f; + __asm__ __volatile__ ("fdivs %0, %0, %1" : "+v" (x) : "v" (y)); + } + + /* Next: overflow. */ + if (FE_OVERFLOW & excepts) + { + float x = FLT_MAX; + __asm__ __volatile__ ("fmuls %0, %0, %0" : "+v" (x)); + } + /* Next: underflow. */ + if (FE_UNDERFLOW & excepts) + { + float x = -FLT_MIN; + + __asm__ __volatile__ ("fmuls %0, %0, %0" : "+v" (x)); + } + + /* Last: inexact. */ + if (FE_INEXACT & excepts) + { + float x = 1.0f, y = 3.0f; + __asm__ __volatile__ ("fdivs %0, %0, %1" : "+v" (x) : "v" (y)); + } + + if (__FE_DENORMAL & excepts) + { + double x = 4.9406564584124654e-324; + __asm__ __volatile__ ("fstod %0, %0" : "+v" (x)); + } +# else + int tmp = 0; + /* First: invalid exception. */ + if (FE_INVALID & excepts) + { + /* One example of a invalid operation is 0 * Infinity. */ + float x = HUGE_VALF, y = 0.0f; + __asm__ __volatile__ ("fmuls %0, %0, %2, %1" + : "+f" (x), "+r"(tmp) : "f" (y)); + } + + /* Next: division by zero. */ + if (FE_DIVBYZERO & excepts) + { + float x = 1.0f, y = 0.0f; + __asm__ __volatile__ ("fdivs %0, %0, %2, %1" + : "+f" (x), "+r"(tmp) : "f" (y)); + } + + /* Next: overflow. */ + if (FE_OVERFLOW & excepts) + { + float x = FLT_MAX, y = FLT_MAX; + __asm__ __volatile__ ("fmuls %0, %0, %2, %1" + : "+f" (x), "+r"(tmp) : "f" (y)); + } + + /* Next: underflow. */ + if (FE_UNDERFLOW & excepts) + { + float x = -FLT_MIN, y = -FLT_MIN; + + __asm__ __volatile__ ("fmuls %0, %0, %2, %1" + : "+f" (x), "+r"(tmp) : "f" (y)); + } + + /* Last: inexact. */ + if (FE_INEXACT & excepts) + { + float x = 1.0f, y = 3.0f; + __asm__ __volatile__ ("fdivs %0, %0, %2, %1" + : "+f" (x), "+r"(tmp) : "f" (y)); + } +# endif /* __csky_fpuv2__ */ + + /* Success. */ + return 0; +} diff --git a/libm/csky/fsetexcptflg.c b/libm/csky/fsetexcptflg.c new file mode 100644 index 000000000..b6281d5c2 --- /dev/null +++ b/libm/csky/fsetexcptflg.c @@ -0,0 +1,42 @@ +/* Set floating-point environment exception handling. + Copyright (C) 2018-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include <fpu_control.h> +#include "fenv_libc.h" + +int +fesetexceptflag (const fexcept_t *flagp, int excepts) +{ + fpu_control_t temp; + + /* Get the current exceptions. */ + _FPU_GETFPSR (temp); + + /* Make sure the flags we want restored are legal. */ + excepts &= FE_ALL_EXCEPT; + + /* Now clear the bits called for, and copy them in from flagp. Note that + we ignore all non-flag bits from *flagp, so they don't matter. */ + temp = ((temp >> CAUSE_SHIFT) & ~excepts) | (*flagp & excepts); + temp = temp << CAUSE_SHIFT; + + _FPU_SETFPSR (temp); + + /* Success. */ + return 0; +} diff --git a/libm/csky/ftestexcept.c b/libm/csky/ftestexcept.c new file mode 100644 index 000000000..6e3217eb1 --- /dev/null +++ b/libm/csky/ftestexcept.c @@ -0,0 +1,28 @@ +/* Test exception in current environment. + Copyright (C) 2018-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include <fpu_control.h> +#include "fenv_libc.h" +#include "fenv_private.h" +#include <stdio.h> + +int +fetestexcept (int excepts) +{ + return libc_fetestexcept_vfp (excepts); +} diff --git a/libm/sh/sh4/Makefile.arch b/libm/sh/sh4/Makefile.arch index e38e99c15..69996edda 100644 --- a/libm/sh/sh4/Makefile.arch +++ b/libm/sh/sh4/Makefile.arch @@ -8,7 +8,7 @@ ifeq ($(UCLIBC_HAS_FENV),y) libm_ARCH_CSRC:=$(wildcard $(libm_SUBARCH_DIR)/*.c) -libm_ARCH_COBJ:=$(patsubst $(libm_SUBARCH_DIR)/%.c,$(libm_SUBARCH_OUT)/%.o,$(libm_ARCH_SRC)) +libm_ARCH_COBJ:=$(patsubst $(libm_SUBARCH_DIR)/%.c,$(libm_SUBARCH_OUT)/%.o,$(libm_ARCH_CSRC)) libm_ARCH_SSRC:=$(wildcard $(libm_SUBARCH_DIR)/*.S) libm_ARCH_SOBJ:=$(patsubst $(libm_SUBARCH_DIR)/%.S,$(libm_SUBARCH_OUT)/%.o,$(libm_ARCH_SSRC)) endif diff --git a/libm/sh/sh4/fclrexcpt.c b/libm/sh/sh4/fclrexcpt.c new file mode 100644 index 000000000..286b4f36a --- /dev/null +++ b/libm/sh/sh4/fclrexcpt.c @@ -0,0 +1,39 @@ +/* Clear given exceptions in current floating-point environment. + Copyright (C) 1998-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include <fpu_control.h> + +int +feclearexcept (int excepts) +{ + fpu_control_t cw; + + /* Mask out unsupported bits/exceptions. */ + excepts &= FE_ALL_EXCEPT; + + /* Read the complete control word. */ + _FPU_GETCW (cw); + + /* Clear exception bits. */ + cw &= ~excepts; + + /* Put the new data in effect. */ + _FPU_SETCW (cw); + + return 0; +} diff --git a/libm/sh/sh4/fedisblxcpt.c b/libm/sh/sh4/fedisblxcpt.c new file mode 100644 index 000000000..69f9ff2c4 --- /dev/null +++ b/libm/sh/sh4/fedisblxcpt.c @@ -0,0 +1,37 @@ +/* Disable floating-point exceptions. + Copyright (C) 2012-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include <fpu_control.h> + +int +fedisableexcept (int excepts) +{ + fpu_control_t temp, old_exc; + + /* Get the current control register contents. */ + _FPU_GETCW (temp); + + old_exc = (temp >> 5) & FE_ALL_EXCEPT; + + excepts &= FE_ALL_EXCEPT; + + temp &= ~(excepts << 5); + _FPU_SETCW (temp); + + return old_exc; +} diff --git a/libm/sh/sh4/feenablxcpt.c b/libm/sh/sh4/feenablxcpt.c new file mode 100644 index 000000000..bf2b01f0b --- /dev/null +++ b/libm/sh/sh4/feenablxcpt.c @@ -0,0 +1,36 @@ +/* Enable floating-point exceptions. + Copyright (C) 2012-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include <fpu_control.h> + +int +feenableexcept (int excepts) +{ + fpu_control_t temp, old_flag; + + /* Get current exceptions. */ + _FPU_GETCW (temp); + + old_flag = (temp >> 5) & FE_ALL_EXCEPT; + excepts &= FE_ALL_EXCEPT; + + temp |= excepts << 5; + _FPU_SETCW (temp); + + return old_flag; +} diff --git a/libm/sh/sh4/fegetenv.c b/libm/sh/sh4/fegetenv.c new file mode 100644 index 000000000..d76964f8b --- /dev/null +++ b/libm/sh/sh4/fegetenv.c @@ -0,0 +1,30 @@ +/* Store current floating-point environment. + Copyright (C) 1997-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include <fpu_control.h> + +int +fegetenv (fenv_t *envp) +{ + fpu_control_t temp; + _FPU_GETCW (temp); + + envp->__fpscr = temp; + + return 0; +} diff --git a/libm/sh/sh4/fegetexcept.c b/libm/sh/sh4/fegetexcept.c new file mode 100644 index 000000000..85f783520 --- /dev/null +++ b/libm/sh/sh4/fegetexcept.c @@ -0,0 +1,30 @@ +/* Get enabled floating-point exceptions. + Copyright (C) 2012-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include <fpu_control.h> + +int +fegetexcept (void) +{ + fpu_control_t temp; + + /* Get current exceptions. */ + _FPU_GETCW (temp); + + return (temp >> 5) & FE_ALL_EXCEPT; +} diff --git a/libm/sh/sh4/fegetmode.c b/libm/sh/sh4/fegetmode.c new file mode 100644 index 000000000..16deb5183 --- /dev/null +++ b/libm/sh/sh4/fegetmode.c @@ -0,0 +1,26 @@ +/* Store current floating-point control modes. SH4 version. + Copyright (C) 2016-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include <fpu_control.h> + +int +fegetmode (femode_t *modep) +{ + _FPU_GETCW (*modep); + return 0; +} diff --git a/libm/sh/sh4/fegetround.c b/libm/sh/sh4/fegetround.c new file mode 100644 index 000000000..b7c26eb6f --- /dev/null +++ b/libm/sh/sh4/fegetround.c @@ -0,0 +1,30 @@ +/* Return current rounding direction. + Copyright (C) 1998-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include <fpu_control.h> + +int +fegetround (void) +{ + fpu_control_t cw; + + /* Get control word. */ + _FPU_GETCW (cw); + + return cw & 0x1; +} diff --git a/libm/sh/sh4/feholdexcpt.c b/libm/sh/sh4/feholdexcpt.c index 70b51e8dd..fc462b403 100644 --- a/libm/sh/sh4/feholdexcpt.c +++ b/libm/sh/sh4/feholdexcpt.c @@ -1,13 +1,19 @@ -/* - * - * Copyright (c) 2007 STMicroelectronics Ltd - * Filippo Arcidiacono (filippo.arcidiacono@st.com) - * - * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. - * - * Taken from glibc 2.6 - * - */ +/* Store current floating-point environment and clear exceptions. + Copyright (C) 1997-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ #include <fenv.h> #include <fpu_control.h> @@ -15,15 +21,20 @@ int feholdexcept (fenv_t *envp) { - unsigned long int temp; + fpu_control_t temp; /* Store the environment. */ _FPU_GETCW (temp); envp->__fpscr = temp; - /* Now set all exceptions to non-stop. */ + /* Clear the status flags. */ temp &= ~FE_ALL_EXCEPT; + + /* Now set all exceptions to non-stop. */ + temp &= ~(FE_ALL_EXCEPT << 5); + _FPU_SETCW (temp); - return 1; + /* Success. */ + return 0; } diff --git a/libm/sh/sh4/fesetenv.c b/libm/sh/sh4/fesetenv.c index c5cfc1d51..6a9a68090 100644 --- a/libm/sh/sh4/fesetenv.c +++ b/libm/sh/sh4/fesetenv.c @@ -1,13 +1,19 @@ -/* - * - * Copyright (c) 2007 STMicroelectronics Ltd - * Filippo Arcidiacono (filippo.arcidiacono@st.com) - * - * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. - * - * Taken from glibc 2.6 - * - */ +/* Install given floating-point environment. + Copyright (C) 1997-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ #include <fenv.h> #include <fpu_control.h> @@ -19,7 +25,7 @@ fesetenv (const fenv_t *envp) _FPU_SETCW (_FPU_DEFAULT); else { - unsigned long int temp = envp->__fpscr; + fpu_control_t temp = envp->__fpscr; _FPU_SETCW (temp); } return 0; diff --git a/libm/sh/sh4/fesetexcept.c b/libm/sh/sh4/fesetexcept.c new file mode 100644 index 000000000..eceb0bb4f --- /dev/null +++ b/libm/sh/sh4/fesetexcept.c @@ -0,0 +1,31 @@ +/* Set given exception flags. SH4 version. + Copyright (C) 2016-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include <fpu_control.h> + +int +fesetexcept (int excepts) +{ + fpu_control_t temp; + + _FPU_GETCW (temp); + temp |= (excepts & FE_ALL_EXCEPT); + _FPU_SETCW (temp); + + return 0; +} diff --git a/libm/sh/sh4/fesetmode.c b/libm/sh/sh4/fesetmode.c new file mode 100644 index 000000000..073da0984 --- /dev/null +++ b/libm/sh/sh4/fesetmode.c @@ -0,0 +1,37 @@ +/* Install given floating-point control modes. SH4 version. + Copyright (C) 2016-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include <fpu_control.h> + +#define FPU_STATUS 0x3f07c + +int +fesetmode (const femode_t *modep) +{ + fpu_control_t fpscr; + + _FPU_GETCW (fpscr); + fpscr &= FPU_STATUS; + if (modep == FE_DFL_MODE) + fpscr |= _FPU_DEFAULT; + else + fpscr |= *modep & ~FPU_STATUS; + _FPU_SETCW (fpscr); + + return 0; +} diff --git a/libm/sh/sh4/fesetround.c b/libm/sh/sh4/fesetround.c new file mode 100644 index 000000000..144eca86f --- /dev/null +++ b/libm/sh/sh4/fesetround.c @@ -0,0 +1,40 @@ +/* Set current rounding direction. + Copyright (C) 1998-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include <fpu_control.h> + +int +fesetround (int round) +{ + fpu_control_t cw; + + if ((round & ~0x1) != 0) + /* ROUND is no valid rounding mode. */ + return 1; + + /* Get current state. */ + _FPU_GETCW (cw); + + /* Set rounding bits. */ + cw &= ~0x1; + cw |= round; + /* Set new state. */ + _FPU_SETCW (cw); + + return 0; +} diff --git a/libm/sh/sh4/feupdateenv.c b/libm/sh/sh4/feupdateenv.c new file mode 100644 index 000000000..cb7e95259 --- /dev/null +++ b/libm/sh/sh4/feupdateenv.c @@ -0,0 +1,36 @@ +/* Install given floating-point environment and raise exceptions. + Copyright (C) 2012-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include <fpu_control.h> + +int +feupdateenv (const fenv_t *envp) +{ + fpu_control_t temp; + + _FPU_GETCW (temp); + temp = (temp & FE_ALL_EXCEPT); + + /* Raise the saved exception. Incidentally for us the implementation + defined format of the values in objects of type fexcept_t is the + same as the ones specified using the FE_* constants. */ + fesetenv (envp); + feraiseexcept ((int) temp); + + return 0; +} diff --git a/libm/sh/sh4/fgetexcptflg.c b/libm/sh/sh4/fgetexcptflg.c new file mode 100644 index 000000000..308b5ad44 --- /dev/null +++ b/libm/sh/sh4/fgetexcptflg.c @@ -0,0 +1,37 @@ +/* Store current representation for exceptions. + Copyright (C) 2013-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include <fpu_control.h> + +int +fegetexceptflag (fexcept_t *flagp, int excepts) +{ + fpu_control_t temp; + + /* Get the current exceptions. */ + _FPU_GETCW (temp); + + /* We only save the relevant bits here. In particular, care has to be + taken with the CAUSE bits, as an inadvertent restore later on could + generate unexpected exceptions. */ + + *flagp = temp & excepts & FE_ALL_EXCEPT; + + /* Success. */ + return 0; +} diff --git a/libm/sh/sh4/fraiseexcpt.c b/libm/sh/sh4/fraiseexcpt.c new file mode 100644 index 000000000..1ed495b7a --- /dev/null +++ b/libm/sh/sh4/fraiseexcpt.c @@ -0,0 +1,70 @@ +/* Raise given exceptions. + Copyright (C) 1997-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include <float.h> +#include <fpu_control.h> +#include <math.h> + +int +feraiseexcept (int excepts) +{ + if (excepts == 0) + return 0; + + /* Raise exceptions represented by EXPECTS. */ + + if (excepts & FE_INEXACT) + { + double d = 1.0, x = 3.0; + __asm__ __volatile__ ("fdiv %1, %0" : "+d" (d) : "d" (x)); + } + + if (excepts & FE_UNDERFLOW) + { + long double d = LDBL_MIN, x = 10; + __asm__ __volatile__ ("fdiv %1, %0" : "+d" (d) : "d" (x)); + } + + if (excepts & FE_OVERFLOW) + { + long double d = LDBL_MAX; + __asm__ __volatile__ ("fmul %0, %0" : "+d" (d) : "d" (d)); + } + + if (excepts & FE_DIVBYZERO) + { + double d = 1.0, x = 0.0; + __asm__ __volatile__ ("fdiv %1, %0" : "+d" (d) : "d" (x)); + } + + if (excepts & FE_INVALID) + { + double d = HUGE_VAL, x = 0.0; + __asm__ __volatile__ ("fmul %1, %0" : "+d" (d) : "d" (x)); + } + + { + /* Restore flag fields. */ + fpu_control_t cw; + _FPU_GETCW (cw); + cw |= (excepts & FE_ALL_EXCEPT); + _FPU_SETCW (cw); + } + + return 0; +} diff --git a/libm/sh/sh4/fsetexcptflg.c b/libm/sh/sh4/fsetexcptflg.c new file mode 100644 index 000000000..8fcb94973 --- /dev/null +++ b/libm/sh/sh4/fsetexcptflg.c @@ -0,0 +1,38 @@ +/* Set floating-point environment exception handling. + Copyright (C) 1997-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include <math.h> +#include <fpu_control.h> + +int +fesetexceptflag (const fexcept_t *flagp, int excepts) +{ + fpu_control_t temp; + + /* Get the current environment. */ + _FPU_GETCW (temp); + + /* Set the desired exception mask. */ + temp &= ~(excepts & FE_ALL_EXCEPT); + temp |= (*flagp & excepts & FE_ALL_EXCEPT); + + /* Save state back to the FPU. */ + _FPU_SETCW (temp); + + return 0; +} diff --git a/libm/sh/sh4/ftestexcept.c b/libm/sh/sh4/ftestexcept.c new file mode 100644 index 000000000..edc523426 --- /dev/null +++ b/libm/sh/sh4/ftestexcept.c @@ -0,0 +1,30 @@ +/* Test exception in current environment. + Copyright (C) 1997-2025 Free Software Foundation, Inc. + + 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 + <https://www.gnu.org/licenses/>. */ + +#include <fenv.h> +#include <fpu_control.h> + +int +fetestexcept (int excepts) +{ + fpu_control_t temp; + + /* Get current exceptions. */ + _FPU_GETCW (temp); + + return temp & excepts & FE_ALL_EXCEPT; +} |