[v6,06/13] ARC: hardware floating point support

Message ID	20200423014126.10417-7-vgupta@synopsys.com
State	New
Headers	show Return-Path: <libc-alpha-bounces@sourceware.org> DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org D1A8E3851C05 To: libc-alpha@sourceware.org Subject: [PATCH v6 06/13] ARC: hardware floating point support Date: Wed, 22 Apr 2020 18:41:19 -0700 Message-Id: <20200423014126.10417-7-vgupta@synopsys.com> In-Reply-To: <20200423014126.10417-1-vgupta@synopsys.com> References: <20200423014126.10417-1-vgupta@synopsys.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: list From: Vineet Gupta via Libc-alpha <libc-alpha@sourceware.org> Reply-To: Vineet Gupta <Vineet.Gupta1@synopsys.com> Cc: Vineet Gupta <Vineet.Gupta1@synopsys.com>, linux-snps-arc@lists.infradead.org Errors-To: libc-alpha-bounces@sourceware.org Sender: "Libc-alpha" <libc-alpha-bounces@sourceware.org>
Series	glibc port to ARC processors \| expand [v6,00/13] glibc port to ARC processors [v6,01/13] ARC: ABI Implementation [v6,02/13] ARC: startup and dynamic linking code [v6,03/13] ARC: Thread Local Storage support [v6,04/13] ARC: Atomics and Locking primitives [v6,05/13] ARC: math soft float support [v6,06/13] ARC: hardware floating point support [v6,07/13] ARC: Linux Syscall Interface [v6,08/13] ARC: Linux ABI [v6,09/13] ARC: Linux Startup and Dynamic Loading [v6,10/13] ARC: ABI lists [v6,11/13] ARC: Build Infrastructure [v6,12/13] build-many-glibcs.py: Enable ARC builds [v6,13/13] Documentation for ARC port

On 22/04/2020 22:41, Vineet Gupta via Libc-alpha wrote: > Signed-off-by: Vineet Gupta <vgupta@synopsys.com> As prior patch we do not use DCO, but rather copyright assignment. Some comments below. > --- > sysdeps/arc/fpu/e_sqrt.c | 27 ++++++++ > sysdeps/arc/fpu/e_sqrtf.c | 27 ++++++++ > sysdeps/arc/fpu/fclrexcpt.c | 36 +++++++++++ > sysdeps/arc/fpu/fegetenv.c | 37 +++++++++++ > sysdeps/arc/fpu/fegetmode.c | 31 ++++++++++ > sysdeps/arc/fpu/fegetround.c | 32 ++++++++++ > sysdeps/arc/fpu/feholdexcpt.c | 43 +++++++++++++ > sysdeps/arc/fpu/fesetenv.c | 48 +++++++++++++++ > sysdeps/arc/fpu/fesetexcept.c | 32 ++++++++++ > sysdeps/arc/fpu/fesetmode.c | 40 ++++++++++++ > sysdeps/arc/fpu/fesetround.c | 40 ++++++++++++ > sysdeps/arc/fpu/feupdateenv.c | 51 +++++++++++++++ > sysdeps/arc/fpu/fgetexcptflg.c | 31 ++++++++++ > sysdeps/arc/fpu/fraiseexcpt.c | 39 ++++++++++++ > sysdeps/arc/fpu/fsetexcptflg.c | 38 ++++++++++++ > sysdeps/arc/fpu/ftestexcept.c | 33 ++++++++++ > sysdeps/arc/fpu/s_fma.c | 28 +++++++++ > sysdeps/arc/fpu/s_fmaf.c | 28 +++++++++ > sysdeps/arc/fpu_control.h | 106 ++++++++++++++++++++++++++++++++ > sysdeps/arc/get-rounding-mode.h | 38 ++++++++++++ > sysdeps/arc/math-tests-trap.h | 27 ++++++++ > sysdeps/arc/tininess.h | 1 + > 22 files changed, 813 insertions(+) > create mode 100644 sysdeps/arc/fpu/e_sqrt.c > create mode 100644 sysdeps/arc/fpu/e_sqrtf.c > create mode 100644 sysdeps/arc/fpu/fclrexcpt.c > create mode 100644 sysdeps/arc/fpu/fegetenv.c > create mode 100644 sysdeps/arc/fpu/fegetmode.c > create mode 100644 sysdeps/arc/fpu/fegetround.c > create mode 100644 sysdeps/arc/fpu/feholdexcpt.c > create mode 100644 sysdeps/arc/fpu/fesetenv.c > create mode 100644 sysdeps/arc/fpu/fesetexcept.c > create mode 100644 sysdeps/arc/fpu/fesetmode.c > create mode 100644 sysdeps/arc/fpu/fesetround.c > create mode 100644 sysdeps/arc/fpu/feupdateenv.c > create mode 100644 sysdeps/arc/fpu/fgetexcptflg.c > create mode 100644 sysdeps/arc/fpu/fraiseexcpt.c > create mode 100644 sysdeps/arc/fpu/fsetexcptflg.c > create mode 100644 sysdeps/arc/fpu/ftestexcept.c > create mode 100644 sysdeps/arc/fpu/s_fma.c > create mode 100644 sysdeps/arc/fpu/s_fmaf.c > create mode 100644 sysdeps/arc/fpu_control.h > create mode 100644 sysdeps/arc/get-rounding-mode.h > create mode 100644 sysdeps/arc/math-tests-trap.h > create mode 100644 sysdeps/arc/tininess.h > > diff --git a/sysdeps/arc/fpu/e_sqrt.c b/sysdeps/arc/fpu/e_sqrt.c > new file mode 100644 > index 000000000000..abb67ef7b061 > --- /dev/null > +++ b/sysdeps/arc/fpu/e_sqrt.c > @@ -0,0 +1,27 @@ > +/* Square root of floating point number. > + Copyright (C) 2015-2020 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 > + <https://www.gnu.org/licenses/>. */ > + > +#include <math_private.h> > +#include <libm-alias-finite.h> > + > +double > +__ieee754_sqrt (double d) > +{ > + return __builtin_sqrt (d); > +} > +libm_alias_finite (__ieee754_sqrt, __sqrt) I think it is better to extend to math-use-builtins.h for cover e_sqrt{f} so we can also adapt to other architecutes. > diff --git a/sysdeps/arc/fpu/e_sqrtf.c b/sysdeps/arc/fpu/e_sqrtf.c > new file mode 100644 > index 000000000000..13008a4f45d6 > --- /dev/null > +++ b/sysdeps/arc/fpu/e_sqrtf.c > @@ -0,0 +1,27 @@ > +/* Single-precision floating point square root. > + Copyright (C) 2015-2020 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 > + <https://www.gnu.org/licenses/>. */ > + > +#include <math_private.h> > +#include <libm-alias-finite.h> > + > +float > +__ieee754_sqrtf (float s) > +{ > + return __builtin_sqrtf (s); > +} > +libm_alias_finite (__ieee754_sqrtf, __sqrtf) Same as before. > diff --git a/sysdeps/arc/fpu/fclrexcpt.c b/sysdeps/arc/fpu/fclrexcpt.c > new file mode 100644 > index 000000000000..549968dcd465 > --- /dev/null > +++ b/sysdeps/arc/fpu/fclrexcpt.c > @@ -0,0 +1,36 @@ > +/* Clear given exceptions in current floating-point environment. > + Copyright (C) 2018-2020 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 > + <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; > +} > +libm_hidden_def (feclearexcept) Ok. > diff --git a/sysdeps/arc/fpu/fegetenv.c b/sysdeps/arc/fpu/fegetenv.c > new file mode 100644 > index 000000000000..058652aeb685 > --- /dev/null > +++ b/sysdeps/arc/fpu/fegetenv.c > @@ -0,0 +1,37 @@ > +/* Store current floating-point environment. > + Copyright (C) 2018-2020 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 > + <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; > +} > +libm_hidden_def (__fegetenv) > +weak_alias (__fegetenv, fegetenv) > +libm_hidden_weak (fegetenv) > diff --git a/sysdeps/arc/fpu/fegetmode.c b/sysdeps/arc/fpu/fegetmode.c > new file mode 100644 > index 000000000000..1f04c2d745fa > --- /dev/null > +++ b/sysdeps/arc/fpu/fegetmode.c > @@ -0,0 +1,31 @@ > +/* Store current floating-point control modes. > + Copyright (C) 2018-2020 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 > + <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/sysdeps/arc/fpu/fegetround.c b/sysdeps/arc/fpu/fegetround.c > new file mode 100644 > index 000000000000..99d4aeee31b7 > --- /dev/null > +++ b/sysdeps/arc/fpu/fegetround.c > @@ -0,0 +1,32 @@ > +/* Return current rounding direction. > + Copyright (C) 1998-2020 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 > + <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; > +} > +libm_hidden_def (__fegetround) > +weak_alias (__fegetround, fegetround) > +libm_hidden_weak (fegetround) > diff --git a/sysdeps/arc/fpu/feholdexcpt.c b/sysdeps/arc/fpu/feholdexcpt.c > new file mode 100644 > index 000000000000..4b849a3cf05b > --- /dev/null > +++ b/sysdeps/arc/fpu/feholdexcpt.c > @@ -0,0 +1,43 @@ > +/* Store current floating-point environment and clear exceptions. > + Copyright (C) 2000-2020 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 > + <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; > +} > +libm_hidden_def (__feholdexcept) > +weak_alias (__feholdexcept, feholdexcept) > +libm_hidden_weak (feholdexcept) > diff --git a/sysdeps/arc/fpu/fesetenv.c b/sysdeps/arc/fpu/fesetenv.c > new file mode 100644 > index 000000000000..828b51cf8afa > --- /dev/null > +++ b/sysdeps/arc/fpu/fesetenv.c > @@ -0,0 +1,48 @@ > +/* Install given floating-point environment (doesnot raise exceptions). > + Copyright (C) 2018-2020 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 > + <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; > +} > +libm_hidden_def (__fesetenv) > +weak_alias (__fesetenv, fesetenv) > +libm_hidden_weak (fesetenv) > diff --git a/sysdeps/arc/fpu/fesetexcept.c b/sysdeps/arc/fpu/fesetexcept.c > new file mode 100644 > index 000000000000..0a1bcf763bee > --- /dev/null > +++ b/sysdeps/arc/fpu/fesetexcept.c > @@ -0,0 +1,32 @@ > +/* Set given exception flags. > + Copyright (C) 2018-2020 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 > + <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/sysdeps/arc/fpu/fesetmode.c b/sysdeps/arc/fpu/fesetmode.c > new file mode 100644 > index 000000000000..2fedaedb9e01 > --- /dev/null > +++ b/sysdeps/arc/fpu/fesetmode.c > @@ -0,0 +1,40 @@ > +/* Install given floating-point control modes. > + Copyright (C) 2018-2020 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 > + <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/sysdeps/arc/fpu/fesetround.c b/sysdeps/arc/fpu/fesetround.c > new file mode 100644 > index 000000000000..7a3526112e30 > --- /dev/null > +++ b/sysdeps/arc/fpu/fesetround.c > @@ -0,0 +1,40 @@ > +/* Set current rounding direction. > + Copyright (C) 1998-2020 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 > + <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; > +} > +libm_hidden_def (__fesetround) > +weak_alias (__fesetround, fesetround) > +libm_hidden_weak (fesetround) > diff --git a/sysdeps/arc/fpu/feupdateenv.c b/sysdeps/arc/fpu/feupdateenv.c > new file mode 100644 > index 000000000000..f2729e732499 > --- /dev/null > +++ b/sysdeps/arc/fpu/feupdateenv.c > @@ -0,0 +1,51 @@ > +/* Install given floating-point environment and raise exceptions, > + without clearing currently raised exceptions. > + Copyright (C) 2018-2020 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 > + <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; > +} > +libm_hidden_def (__feupdateenv) > +weak_alias (__feupdateenv, feupdateenv) > +libm_hidden_weak (feupdateenv) > diff --git a/sysdeps/arc/fpu/fgetexcptflg.c b/sysdeps/arc/fpu/fgetexcptflg.c > new file mode 100644 > index 000000000000..9d1423eaeecb > --- /dev/null > +++ b/sysdeps/arc/fpu/fgetexcptflg.c > @@ -0,0 +1,31 @@ > +/* Store current representation for exceptions, ARC version. > + Copyright (C) 1998-2020 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 > + <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/sysdeps/arc/fpu/fraiseexcpt.c b/sysdeps/arc/fpu/fraiseexcpt.c > new file mode 100644 > index 000000000000..9b9d6a951f42 > --- /dev/null > +++ b/sysdeps/arc/fpu/fraiseexcpt.c > @@ -0,0 +1,39 @@ > +/* Raise given exceptions. > + Copyright (C) 2018-2020 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 > + <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; > +} > +libm_hidden_def (__feraiseexcept) > +weak_alias (__feraiseexcept, feraiseexcept) > +libm_hidden_weak (feraiseexcept) > diff --git a/sysdeps/arc/fpu/fsetexcptflg.c b/sysdeps/arc/fpu/fsetexcptflg.c > new file mode 100644 > index 000000000000..b8e495692145 > --- /dev/null > +++ b/sysdeps/arc/fpu/fsetexcptflg.c > @@ -0,0 +1,38 @@ > +/* Set floating-point environment exception handling, ARC version. > + Copyright (C) 1998-2020 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 > + <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/sysdeps/arc/fpu/ftestexcept.c b/sysdeps/arc/fpu/ftestexcept.c > new file mode 100644 > index 000000000000..84fd3cf0469c > --- /dev/null > +++ b/sysdeps/arc/fpu/ftestexcept.c > @@ -0,0 +1,33 @@ > +/* Test exception in current environment. > + Copyright (C) 2018-2020 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 > + <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; > +} > +libm_hidden_def (fetestexcept) > diff --git a/sysdeps/arc/fpu/s_fma.c b/sysdeps/arc/fpu/s_fma.c > new file mode 100644 > index 000000000000..48bb40482dc9 > --- /dev/null > +++ b/sysdeps/arc/fpu/s_fma.c > @@ -0,0 +1,28 @@ > +/* Copyright (C) 1996-2020 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 > + <https://www.gnu.org/licenses/>. */ > + > +#include <math.h> > +#include <libm-alias-double.h> > + > +double > +__fma (double x, double y, double z) > +{ > + return __builtin_fma (x, y, z); > +} > + > +libm_alias_double (__fma, fma) Same as for sqrt{f}. > diff --git a/sysdeps/arc/fpu/s_fmaf.c b/sysdeps/arc/fpu/s_fmaf.c > new file mode 100644 > index 000000000000..544f32e27aec > --- /dev/null > +++ b/sysdeps/arc/fpu/s_fmaf.c > @@ -0,0 +1,28 @@ > +/* Copyright (C) 2011-2020 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 > + <https://www.gnu.org/licenses/>. */ > + > +#include <math.h> > +#include <libm-alias-float.h> > + > +float > +__fmaf (float x, float y, float z) > +{ > + return __builtin_fmaf (x, y, z); > +} > + > +libm_alias_float (__fma, fma) > diff --git a/sysdeps/arc/fpu_control.h b/sysdeps/arc/fpu_control.h > new file mode 100644 > index 000000000000..121656ff7d8c > --- /dev/null > +++ b/sysdeps/arc/fpu_control.h > @@ -0,0 +1,106 @@ > +/* FPU control word bits. ARC version. > + Copyright (C) 2018-2020 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 > + <https://www.gnu.org/licenses/>. */ > + > +#ifndef _FPU_CONTROL_H > +#define _FPU_CONTROL_H > + > +/* ARC FPU control register bits. > + > + [ 0] -> IVE: Enable invalid operation exception. > + if 0, soft exception: status register IV flag set. > + if 1, hardware exception trap (not supported in Linux yet). > + [ 1] -> DZE: Enable division by zero exception. > + if 0, soft exception: status register IV flag set. > + if 1, hardware exception: (not supported in Linux yet). > + [9:8] -> RM: Rounding Mode: > + 00 - Rounding toward zero. > + 01 - Rounding to nearest (default). > + 10 - Rounding (up) toward plus infinity. > + 11 - Rounding (down)toward minus infinity. > + > + ARC FPU status register bits. > + > + [ 0] -> IV: flag invalid operation. > + [ 1] -> DZ: flag division by zero. > + [ 2] -> OV: flag Overflow operation. > + [ 3] -> UV: flag Underflow operation. > + [ 4] -> IX: flag Inexact operation. > + [31] -> FWE: Flag Write Enable. > + If 1, above flags writable explicitly (clearing), > + else IoW and only writable indirectly via bits [12:7]. */ > + > +#include <features.h> > + > +#if !defined(__ARC_FPU_SP__) && !defined(__ARC_FPU_DP__) > + > +# define _FPU_RESERVED 0xffffffff > +# define _FPU_DEFAULT 0x00000000 > +typedef unsigned int fpu_control_t; > +# define _FPU_GETCW(cw) (cw) = 0 > +# define _FPU_SETCW(cw) (void) (cw) > +# define _FPU_GETS(cw) (cw) = 0 > +# define _FPU_SETS(cw) (void) (cw) > +extern fpu_control_t __fpu_control; > + > +#else > + > +#define _FPU_RESERVED 0 > + > +/* The fdlibm code requires strict IEEE double precision arithmetic, > + and no interrupts for exceptions, rounding to nearest. > + So only RM set to b'01. */ > +# define _FPU_DEFAULT 0x00000100 > + > +/* Actually default needs to have FWE bit as 1 but that is already > + ingrained into _FPU_SETS macro below. */ > +#define _FPU_FPSR_DEFAULT 0x00000000 > + > +#define __FPU_RND_SHIFT 8 > +#define __FPU_RND_MASK 0x3 > + > +/* Type of the control word. */ > +typedef unsigned int fpu_control_t; > + > +/* Macros for accessing the hardware control word. */ > +# define _FPU_GETCW(cw) __asm__ volatile ("lr %0, [0x300]" : "=r" (cw)) > +# define _FPU_SETCW(cw) __asm__ volatile ("sr %0, [0x300]" : : "r" (cw)) > + > +/* Macros for accessing the hardware status word. > + FWE bit is special as it controls if actual status bits could be wrritten > + explicitly (other than FPU instructions). We handle it here to keep the > + callers agnostic of it: > + - clear it out when reporting status bits > + - always set it when changing status bits. */ > +# define _FPU_GETS(cw) \ > + __asm__ volatile ("lr %0, [0x301] \r\n" \ > + "bclr %0, %0, 31 \r\n" \ > + : "=r" (cw)) > + > +# define _FPU_SETS(cw) \ > + do { \ > + unsigned int __tmp = 0x80000000 | (cw); \ > + __asm__ volatile ("sr %0, [0x301] \r\n" \ > + : : "r" (__tmp)); \ > + } while (0) > + Although this code follow other architectures, I think it woudl be better to move forward a macro that emulates function calls and use proper static inline function instead for _FPU_* (as for get-rounding-mode.h). > +/* Default control word set at startup. */ > +extern fpu_control_t __fpu_control; > + > +#endif > + > +#endif /* fpu_control.h */ > diff --git a/sysdeps/arc/get-rounding-mode.h b/sysdeps/arc/get-rounding-mode.h > new file mode 100644 > index 000000000000..cfa5c34473ac > --- /dev/null > +++ b/sysdeps/arc/get-rounding-mode.h > @@ -0,0 +1,38 @@ > +/* Determine floating-point rounding mode within libc. ARC version. > + Copyright (C) 1998-2020 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 > + <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 */ Ok. > diff --git a/sysdeps/arc/math-tests-trap.h b/sysdeps/arc/math-tests-trap.h > new file mode 100644 > index 000000000000..1a3581396573 > --- /dev/null > +++ b/sysdeps/arc/math-tests-trap.h > @@ -0,0 +1,27 @@ > +/* Configuration for math tests: support for enabling exception traps. > + ARC version. > + Copyright (C) 2014-2020 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 > + <https://www.gnu.org/licenses/>. */ > + > +#ifndef ARC_MATH_TESTS_TRAP_H > +#define ARC_MATH_TESTS_TRAP_H 1 > + > +/* Trapping exceptions are optional on ARC > + and not supported in Linux kernel just yet. */ > +#define EXCEPTION_ENABLE_SUPPORTED(EXCEPT) ((EXCEPT) == 0) > + > +#endif /* math-tests-trap.h. */ Ok. > diff --git a/sysdeps/arc/tininess.h b/sysdeps/arc/tininess.h > new file mode 100644 > index 000000000000..1db37790f881 > --- /dev/null > +++ b/sysdeps/arc/tininess.h > @@ -0,0 +1 @@ > +#define TININESS_AFTER_ROUNDING 1 > Ok.

diff --git a/sysdeps/arc/fpu/e_sqrt.c b/sysdeps/arc/fpu/e_sqrt.c new file mode 100644 index 000000000000..abb67ef7b061 --- /dev/null +++ b/sysdeps/arc/fpu/e_sqrt.c @@ -0,0 +1,27 @@ +/* Square root of floating point number. + Copyright (C) 2015-2020 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 + <https://www.gnu.org/licenses/>. */ + +#include <math_private.h> +#include <libm-alias-finite.h> + +double +__ieee754_sqrt (double d) +{ + return __builtin_sqrt (d); +} +libm_alias_finite (__ieee754_sqrt, __sqrt) diff --git a/sysdeps/arc/fpu/e_sqrtf.c b/sysdeps/arc/fpu/e_sqrtf.c new file mode 100644 index 000000000000..13008a4f45d6 --- /dev/null +++ b/sysdeps/arc/fpu/e_sqrtf.c @@ -0,0 +1,27 @@ +/* Single-precision floating point square root. + Copyright (C) 2015-2020 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 + <https://www.gnu.org/licenses/>. */ + +#include <math_private.h> +#include <libm-alias-finite.h> + +float +__ieee754_sqrtf (float s) +{ + return __builtin_sqrtf (s); +} +libm_alias_finite (__ieee754_sqrtf, __sqrtf) diff --git a/sysdeps/arc/fpu/fclrexcpt.c b/sysdeps/arc/fpu/fclrexcpt.c new file mode 100644 index 000000000000..549968dcd465 --- /dev/null +++ b/sysdeps/arc/fpu/fclrexcpt.c @@ -0,0 +1,36 @@ +/* Clear given exceptions in current floating-point environment. + Copyright (C) 2018-2020 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 + <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; +} +libm_hidden_def (feclearexcept) diff --git a/sysdeps/arc/fpu/fegetenv.c b/sysdeps/arc/fpu/fegetenv.c new file mode 100644 index 000000000000..058652aeb685 --- /dev/null +++ b/sysdeps/arc/fpu/fegetenv.c @@ -0,0 +1,37 @@ +/* Store current floating-point environment. + Copyright (C) 2018-2020 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 + <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; +} +libm_hidden_def (__fegetenv) +weak_alias (__fegetenv, fegetenv) +libm_hidden_weak (fegetenv) diff --git a/sysdeps/arc/fpu/fegetmode.c b/sysdeps/arc/fpu/fegetmode.c new file mode 100644 index 000000000000..1f04c2d745fa --- /dev/null +++ b/sysdeps/arc/fpu/fegetmode.c @@ -0,0 +1,31 @@ +/* Store current floating-point control modes. + Copyright (C) 2018-2020 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 + <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/sysdeps/arc/fpu/fegetround.c b/sysdeps/arc/fpu/fegetround.c new file mode 100644 index 000000000000..99d4aeee31b7 --- /dev/null +++ b/sysdeps/arc/fpu/fegetround.c @@ -0,0 +1,32 @@ +/* Return current rounding direction. + Copyright (C) 1998-2020 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 + <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; +} +libm_hidden_def (__fegetround) +weak_alias (__fegetround, fegetround) +libm_hidden_weak (fegetround) diff --git a/sysdeps/arc/fpu/feholdexcpt.c b/sysdeps/arc/fpu/feholdexcpt.c new file mode 100644 index 000000000000..4b849a3cf05b --- /dev/null +++ b/sysdeps/arc/fpu/feholdexcpt.c @@ -0,0 +1,43 @@ +/* Store current floating-point environment and clear exceptions. + Copyright (C) 2000-2020 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 + <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; +} +libm_hidden_def (__feholdexcept) +weak_alias (__feholdexcept, feholdexcept) +libm_hidden_weak (feholdexcept) diff --git a/sysdeps/arc/fpu/fesetenv.c b/sysdeps/arc/fpu/fesetenv.c new file mode 100644 index 000000000000..828b51cf8afa --- /dev/null +++ b/sysdeps/arc/fpu/fesetenv.c @@ -0,0 +1,48 @@ +/* Install given floating-point environment (doesnot raise exceptions). + Copyright (C) 2018-2020 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 + <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; +} +libm_hidden_def (__fesetenv) +weak_alias (__fesetenv, fesetenv) +libm_hidden_weak (fesetenv) diff --git a/sysdeps/arc/fpu/fesetexcept.c b/sysdeps/arc/fpu/fesetexcept.c new file mode 100644 index 000000000000..0a1bcf763bee --- /dev/null +++ b/sysdeps/arc/fpu/fesetexcept.c @@ -0,0 +1,32 @@ +/* Set given exception flags. + Copyright (C) 2018-2020 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 + <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/sysdeps/arc/fpu/fesetmode.c b/sysdeps/arc/fpu/fesetmode.c new file mode 100644 index 000000000000..2fedaedb9e01 --- /dev/null +++ b/sysdeps/arc/fpu/fesetmode.c @@ -0,0 +1,40 @@ +/* Install given floating-point control modes. + Copyright (C) 2018-2020 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 + <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/sysdeps/arc/fpu/fesetround.c b/sysdeps/arc/fpu/fesetround.c new file mode 100644 index 000000000000..7a3526112e30 --- /dev/null +++ b/sysdeps/arc/fpu/fesetround.c @@ -0,0 +1,40 @@ +/* Set current rounding direction. + Copyright (C) 1998-2020 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 + <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; +} +libm_hidden_def (__fesetround) +weak_alias (__fesetround, fesetround) +libm_hidden_weak (fesetround) diff --git a/sysdeps/arc/fpu/feupdateenv.c b/sysdeps/arc/fpu/feupdateenv.c new file mode 100644 index 000000000000..f2729e732499 --- /dev/null +++ b/sysdeps/arc/fpu/feupdateenv.c @@ -0,0 +1,51 @@ +/* Install given floating-point environment and raise exceptions, + without clearing currently raised exceptions. + Copyright (C) 2018-2020 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 + <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; +} +libm_hidden_def (__feupdateenv) +weak_alias (__feupdateenv, feupdateenv) +libm_hidden_weak (feupdateenv) diff --git a/sysdeps/arc/fpu/fgetexcptflg.c b/sysdeps/arc/fpu/fgetexcptflg.c new file mode 100644 index 000000000000..9d1423eaeecb --- /dev/null +++ b/sysdeps/arc/fpu/fgetexcptflg.c @@ -0,0 +1,31 @@ +/* Store current representation for exceptions, ARC version. + Copyright (C) 1998-2020 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 + <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/sysdeps/arc/fpu/fraiseexcpt.c b/sysdeps/arc/fpu/fraiseexcpt.c new file mode 100644 index 000000000000..9b9d6a951f42 --- /dev/null +++ b/sysdeps/arc/fpu/fraiseexcpt.c @@ -0,0 +1,39 @@ +/* Raise given exceptions. + Copyright (C) 2018-2020 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 + <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; +} +libm_hidden_def (__feraiseexcept) +weak_alias (__feraiseexcept, feraiseexcept) +libm_hidden_weak (feraiseexcept) diff --git a/sysdeps/arc/fpu/fsetexcptflg.c b/sysdeps/arc/fpu/fsetexcptflg.c new file mode 100644 index 000000000000..b8e495692145 --- /dev/null +++ b/sysdeps/arc/fpu/fsetexcptflg.c @@ -0,0 +1,38 @@ +/* Set floating-point environment exception handling, ARC version. + Copyright (C) 1998-2020 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 + <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/sysdeps/arc/fpu/ftestexcept.c b/sysdeps/arc/fpu/ftestexcept.c new file mode 100644 index 000000000000..84fd3cf0469c --- /dev/null +++ b/sysdeps/arc/fpu/ftestexcept.c @@ -0,0 +1,33 @@ +/* Test exception in current environment. + Copyright (C) 2018-2020 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 + <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; +} +libm_hidden_def (fetestexcept) diff --git a/sysdeps/arc/fpu/s_fma.c b/sysdeps/arc/fpu/s_fma.c new file mode 100644 index 000000000000..48bb40482dc9 --- /dev/null +++ b/sysdeps/arc/fpu/s_fma.c @@ -0,0 +1,28 @@ +/* Copyright (C) 1996-2020 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 + <https://www.gnu.org/licenses/>. */ + +#include <math.h> +#include <libm-alias-double.h> + +double +__fma (double x, double y, double z) +{ + return __builtin_fma (x, y, z); +} + +libm_alias_double (__fma, fma) diff --git a/sysdeps/arc/fpu/s_fmaf.c b/sysdeps/arc/fpu/s_fmaf.c new file mode 100644 index 000000000000..544f32e27aec --- /dev/null +++ b/sysdeps/arc/fpu/s_fmaf.c @@ -0,0 +1,28 @@ +/* Copyright (C) 2011-2020 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 + <https://www.gnu.org/licenses/>. */ + +#include <math.h> +#include <libm-alias-float.h> + +float +__fmaf (float x, float y, float z) +{ + return __builtin_fmaf (x, y, z); +} + +libm_alias_float (__fma, fma) diff --git a/sysdeps/arc/fpu_control.h b/sysdeps/arc/fpu_control.h new file mode 100644 index 000000000000..121656ff7d8c --- /dev/null +++ b/sysdeps/arc/fpu_control.h @@ -0,0 +1,106 @@ +/* FPU control word bits. ARC version. + Copyright (C) 2018-2020 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 + <https://www.gnu.org/licenses/>. */ + +#ifndef _FPU_CONTROL_H +#define _FPU_CONTROL_H + +/* ARC FPU control register bits. + + [ 0] -> IVE: Enable invalid operation exception. + if 0, soft exception: status register IV flag set. + if 1, hardware exception trap (not supported in Linux yet). + [ 1] -> DZE: Enable division by zero exception. + if 0, soft exception: status register IV flag set. + if 1, hardware exception: (not supported in Linux yet). + [9:8] -> RM: Rounding Mode: + 00 - Rounding toward zero. + 01 - Rounding to nearest (default). + 10 - Rounding (up) toward plus infinity. + 11 - Rounding (down)toward minus infinity. + + ARC FPU status register bits. + + [ 0] -> IV: flag invalid operation. + [ 1] -> DZ: flag division by zero. + [ 2] -> OV: flag Overflow operation. + [ 3] -> UV: flag Underflow operation. + [ 4] -> IX: flag Inexact operation. + [31] -> FWE: Flag Write Enable. + If 1, above flags writable explicitly (clearing), + else IoW and only writable indirectly via bits [12:7]. */ + +#include <features.h> + +#if !defined(__ARC_FPU_SP__) && !defined(__ARC_FPU_DP__) + +# define _FPU_RESERVED 0xffffffff +# define _FPU_DEFAULT 0x00000000 +typedef unsigned int fpu_control_t; +# define _FPU_GETCW(cw) (cw) = 0 +# define _FPU_SETCW(cw) (void) (cw) +# define _FPU_GETS(cw) (cw) = 0 +# define _FPU_SETS(cw) (void) (cw) +extern fpu_control_t __fpu_control; + +#else + +#define _FPU_RESERVED 0 + +/* The fdlibm code requires strict IEEE double precision arithmetic, + and no interrupts for exceptions, rounding to nearest. + So only RM set to b'01. */ +# define _FPU_DEFAULT 0x00000100 + +/* Actually default needs to have FWE bit as 1 but that is already + ingrained into _FPU_SETS macro below. */ +#define _FPU_FPSR_DEFAULT 0x00000000 + +#define __FPU_RND_SHIFT 8 +#define __FPU_RND_MASK 0x3 + +/* Type of the control word. */ +typedef unsigned int fpu_control_t; + +/* Macros for accessing the hardware control word. */ +# define _FPU_GETCW(cw) __asm__ volatile ("lr %0, [0x300]" : "=r" (cw)) +# define _FPU_SETCW(cw) __asm__ volatile ("sr %0, [0x300]" : : "r" (cw)) + +/* Macros for accessing the hardware status word. + FWE bit is special as it controls if actual status bits could be wrritten + explicitly (other than FPU instructions). We handle it here to keep the + callers agnostic of it: + - clear it out when reporting status bits + - always set it when changing status bits. */ +# define _FPU_GETS(cw) \ + __asm__ volatile ("lr %0, [0x301] \r\n" \ + "bclr %0, %0, 31 \r\n" \ + : "=r" (cw)) + +# define _FPU_SETS(cw) \ + do { \ + unsigned int __tmp = 0x80000000 | (cw); \ + __asm__ volatile ("sr %0, [0x301] \r\n" \ + : : "r" (__tmp)); \ + } while (0) + +/* Default control word set at startup. */ +extern fpu_control_t __fpu_control; + +#endif + +#endif /* fpu_control.h */ diff --git a/sysdeps/arc/get-rounding-mode.h b/sysdeps/arc/get-rounding-mode.h new file mode 100644 index 000000000000..cfa5c34473ac --- /dev/null +++ b/sysdeps/arc/get-rounding-mode.h @@ -0,0 +1,38 @@ +/* Determine floating-point rounding mode within libc. ARC version. + Copyright (C) 1998-2020 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 + <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/sysdeps/arc/math-tests-trap.h b/sysdeps/arc/math-tests-trap.h new file mode 100644 index 000000000000..1a3581396573 --- /dev/null +++ b/sysdeps/arc/math-tests-trap.h @@ -0,0 +1,27 @@ +/* Configuration for math tests: support for enabling exception traps. + ARC version. + Copyright (C) 2014-2020 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 + <https://www.gnu.org/licenses/>. */ + +#ifndef ARC_MATH_TESTS_TRAP_H +#define ARC_MATH_TESTS_TRAP_H 1 + +/* Trapping exceptions are optional on ARC + and not supported in Linux kernel just yet. */ +#define EXCEPTION_ENABLE_SUPPORTED(EXCEPT) ((EXCEPT) == 0) + +#endif /* math-tests-trap.h. */ diff --git a/sysdeps/arc/tininess.h b/sysdeps/arc/tininess.h new file mode 100644 index 000000000000..1db37790f881 --- /dev/null +++ b/sysdeps/arc/tininess.h @@ -0,0 +1 @@ +#define TININESS_AFTER_ROUNDING 1

[v6,06/13] ARC: hardware floating point support

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