Message ID | 20200701000816.19309-1-vgupta@synopsys.com |
---|---|
State | New |
Headers | show |
Series | None | expand |
On 30/06/2020 21:08, Vineet Gupta via Libc-alpha wrote: > --- > Changes since v7: > - Disintegrated math-use-builtins.h (deleted) and added > math-use-builtins-{fma,sqrt}.h LGTM with some clarification below. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> > --- > 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/math-use-builtins-fma.h | 4 + > sysdeps/arc/fpu/math-use-builtins-sqrt.h | 4 + > 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 + > 20 files changed, 711 insertions(+) > 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/math-use-builtins-fma.h > create mode 100644 sysdeps/arc/fpu/math-use-builtins-sqrt.h > 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/fclrexcpt.c b/sysdeps/arc/fpu/fclrexcpt.c > new file mode 100644 > index 000000000000..7653d99a008c > --- /dev/null > +++ b/sysdeps/arc/fpu/fclrexcpt.c > @@ -0,0 +1,36 @@ > +/* Clear given exceptions in current floating-point environment. > + Copyright (C) 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..bbb3b477b423 > --- /dev/null > +++ b/sysdeps/arc/fpu/fegetenv.c > @@ -0,0 +1,37 @@ > +/* Store current floating-point environment. > + Copyright (C) 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) Ok. > diff --git a/sysdeps/arc/fpu/fegetmode.c b/sysdeps/arc/fpu/fegetmode.c > new file mode 100644 > index 000000000000..f02c9119f222 > --- /dev/null > +++ b/sysdeps/arc/fpu/fegetmode.c > @@ -0,0 +1,31 @@ > +/* Store current floating-point control modes. > + Copyright (C) 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; > +} OK. > diff --git a/sysdeps/arc/fpu/fegetround.c b/sysdeps/arc/fpu/fegetround.c > new file mode 100644 > index 000000000000..c5496bcbf7b4 > --- /dev/null > +++ b/sysdeps/arc/fpu/fegetround.c > @@ -0,0 +1,32 @@ > +/* Return current rounding direction. > + Copyright (C) 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) Ok. > diff --git a/sysdeps/arc/fpu/feholdexcpt.c b/sysdeps/arc/fpu/feholdexcpt.c > new file mode 100644 > index 000000000000..59527ee25a66 > --- /dev/null > +++ b/sysdeps/arc/fpu/feholdexcpt.c > @@ -0,0 +1,43 @@ > +/* Store current floating-point environment and clear exceptions. > + Copyright (C) 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) Ok. > diff --git a/sysdeps/arc/fpu/fesetenv.c b/sysdeps/arc/fpu/fesetenv.c > new file mode 100644 > index 000000000000..4ef858fc10a9 > --- /dev/null > +++ b/sysdeps/arc/fpu/fesetenv.c > @@ -0,0 +1,48 @@ > +/* Install given floating-point environment (doesnot raise exceptions). > + Copyright (C) 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) Ok. > diff --git a/sysdeps/arc/fpu/fesetexcept.c b/sysdeps/arc/fpu/fesetexcept.c > new file mode 100644 > index 000000000000..77517d0b25ab > --- /dev/null > +++ b/sysdeps/arc/fpu/fesetexcept.c > @@ -0,0 +1,32 @@ > +/* Set given exception flags. > + Copyright (C) 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; > +} Ok. > diff --git a/sysdeps/arc/fpu/fesetmode.c b/sysdeps/arc/fpu/fesetmode.c > new file mode 100644 > index 000000000000..c4ea02d8d15b > --- /dev/null > +++ b/sysdeps/arc/fpu/fesetmode.c > @@ -0,0 +1,40 @@ > +/* Install given floating-point control modes. > + Copyright (C) 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; > +} Ok. > diff --git a/sysdeps/arc/fpu/fesetround.c b/sysdeps/arc/fpu/fesetround.c > new file mode 100644 > index 000000000000..701c0b2dcb42 > --- /dev/null > +++ b/sysdeps/arc/fpu/fesetround.c > @@ -0,0 +1,40 @@ > +/* Set current rounding direction. > + Copyright (C) 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) Ok. > diff --git a/sysdeps/arc/fpu/feupdateenv.c b/sysdeps/arc/fpu/feupdateenv.c > new file mode 100644 > index 000000000000..c63aefb25463 > --- /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) 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) Ok. > diff --git a/sysdeps/arc/fpu/fgetexcptflg.c b/sysdeps/arc/fpu/fgetexcptflg.c > new file mode 100644 > index 000000000000..a816121fd9b7 > --- /dev/null > +++ b/sysdeps/arc/fpu/fgetexcptflg.c > @@ -0,0 +1,31 @@ > +/* Store current representation for exceptions, ARC version. > + Copyright (C) 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; > +} Ok. > diff --git a/sysdeps/arc/fpu/fraiseexcpt.c b/sysdeps/arc/fpu/fraiseexcpt.c > new file mode 100644 > index 000000000000..067c0607784f > --- /dev/null > +++ b/sysdeps/arc/fpu/fraiseexcpt.c > @@ -0,0 +1,39 @@ > +/* Raise given exceptions. > + Copyright (C) 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. */ Capitalize 'currently'. > + _FPU_GETS (fpsr); > + fpsr |= excepts; > + > + _FPU_SETS (fpsr); > + > + return 0; > +} > +libm_hidden_def (__feraiseexcept) > +weak_alias (__feraiseexcept, feraiseexcept) > +libm_hidden_weak (feraiseexcept) Ok. > diff --git a/sysdeps/arc/fpu/fsetexcptflg.c b/sysdeps/arc/fpu/fsetexcptflg.c > new file mode 100644 > index 000000000000..f9e08d504418 > --- /dev/null > +++ b/sysdeps/arc/fpu/fsetexcptflg.c > @@ -0,0 +1,38 @@ > +/* Set floating-point environment exception handling, ARC version. > + Copyright (C) 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; > +} Ok. > diff --git a/sysdeps/arc/fpu/ftestexcept.c b/sysdeps/arc/fpu/ftestexcept.c > new file mode 100644 > index 000000000000..bb8ed27ab22b > --- /dev/null > +++ b/sysdeps/arc/fpu/ftestexcept.c > @@ -0,0 +1,33 @@ > +/* Test exception in current environment. > + Copyright (C) 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) Ok. > diff --git a/sysdeps/arc/fpu/math-use-builtins-fma.h b/sysdeps/arc/fpu/math-use-builtins-fma.h > new file mode 100644 > index 000000000000..eede75aa41be > --- /dev/null > +++ b/sysdeps/arc/fpu/math-use-builtins-fma.h > @@ -0,0 +1,4 @@ > +#define USE_FMA_BUILTIN 1 > +#define USE_FMAF_BUILTIN 1 > +#define USE_FMAL_BUILTIN 0 > +#define USE_FMAF128_BUILTIN 0 Ok. > diff --git a/sysdeps/arc/fpu/math-use-builtins-sqrt.h b/sysdeps/arc/fpu/math-use-builtins-sqrt.h > new file mode 100644 > index 000000000000..e94c915ba66a > --- /dev/null > +++ b/sysdeps/arc/fpu/math-use-builtins-sqrt.h > @@ -0,0 +1,4 @@ > +#define USE_SQRT_BUILTIN 1 > +#define USE_SQRTF_BUILTIN 1 > +#define USE_SQRTL_BUILTIN 0 > +#define USE_SQRTF128_BUILTIN 0 Ok. > diff --git a/sysdeps/arc/fpu_control.h b/sysdeps/arc/fpu_control.h > new file mode 100644 > index 000000000000..64457972d637 > --- /dev/null > +++ b/sysdeps/arc/fpu_control.h > @@ -0,0 +1,106 @@ > +/* FPU control word bits. ARC version. > + Copyright (C) 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]. */ Good description. > + > +#include <features.h> > + > +#if !defined(__ARC_FPU_SP__) && !defined(__ARC_FPU_DP__) My guess is __ARC_FPU_SP__ indicates single floating point and __ARC_FPU_DP__ a double precision support. Is there a possibility to compiler define just one of them? If so how should we handle it on glibc? > + > +# 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 */ Ok. > diff --git a/sysdeps/arc/get-rounding-mode.h b/sysdeps/arc/get-rounding-mode.h > new file mode 100644 > index 000000000000..15173e37aa4f > --- /dev/null > +++ b/sysdeps/arc/get-rounding-mode.h > @@ -0,0 +1,38 @@ > +/* Determine floating-point rounding mode within libc. ARC version. > + Copyright (C) 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..08b16f57976a > --- /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) 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.
On 7/2/20 11:55 AM, Adhemerval Zanella via Libc-alpha wrote: > > > On 30/06/2020 21:08, Vineet Gupta via Libc-alpha wrote: >> --- >> Changes since v7: >> - Disintegrated math-use-builtins.h (deleted) and added >> math-use-builtins-{fma,sqrt}.h > > LGTM with some clarification below. > > Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> >> +#include <features.h> >> + >> +#if !defined(__ARC_FPU_SP__) && !defined(__ARC_FPU_DP__) > > My guess is __ARC_FPU_SP__ indicates single floating point and > __ARC_FPU_DP__ a double precision support. Right. > Is there a possibility > to compiler define just one of them? If so how should we handle it > on glibc? Technically yes. The differences would be in gcc codegen. There's no ARC hand written code which needs to handle that. Ofcourse we only test with -mcpu=hs38_linux which implies both SP and DP. -Vineet
On 02/07/2020 21:09, Vineet Gupta wrote: > On 7/2/20 11:55 AM, Adhemerval Zanella via Libc-alpha wrote: >> >> >> On 30/06/2020 21:08, Vineet Gupta via Libc-alpha wrote: >>> --- >>> Changes since v7: >>> - Disintegrated math-use-builtins.h (deleted) and added >>> math-use-builtins-{fma,sqrt}.h >> >> LGTM with some clarification below. >> >> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> > > >>> +#include <features.h> >>> + >>> +#if !defined(__ARC_FPU_SP__) && !defined(__ARC_FPU_DP__) >> >> My guess is __ARC_FPU_SP__ indicates single floating point and >> __ARC_FPU_DP__ a double precision support. > > Right. > >> Is there a possibility >> to compiler define just one of them? If so how should we handle it >> on glibc? > > Technically yes. The differences would be in gcc codegen. There's no ARC hand > written code which needs to handle that. Ofcourse we only test with > -mcpu=hs38_linux which implies both SP and DP. Should we restrict the configure to require -mcpu=hs38_linux then? Or gcc code gen will use soft-float and handle it transparently?
On 7/2/20 7:16 PM, Adhemerval Zanella via Libc-alpha wrote: >> >>> Is there a possibility >>> to compiler define just one of them? If so how should we handle it >>> on glibc? >> >> Technically yes. The differences would be in gcc codegen. There's no ARC hand >> written code which needs to handle that. Ofcourse we only test with >> -mcpu=hs38_linux which implies both SP and DP. > > Should we restrict the configure to require -mcpu=hs38_linux then? Or > gcc code gen will use soft-float and handle it transparently? no -mpcu or -mcpu=hs38 is soft-float -mcpu=hs38_linux (misnamed) is hard-float (SP+DP) both are tested and work equally well ! What is not tested is hard-float + (SP only or DP only). -Vineet
On 03/07/2020 00:05, Vineet Gupta wrote: > On 7/2/20 7:16 PM, Adhemerval Zanella via Libc-alpha wrote: > >>> >>>> Is there a possibility >>>> to compiler define just one of them? If so how should we handle it >>>> on glibc? >>> >>> Technically yes. The differences would be in gcc codegen. There's no ARC hand >>> written code which needs to handle that. Ofcourse we only test with >>> -mcpu=hs38_linux which implies both SP and DP. >> >> Should we restrict the configure to require -mcpu=hs38_linux then? Or >> gcc code gen will use soft-float and handle it transparently? > > no -mpcu or -mcpu=hs38 is soft-float > -mcpu=hs38_linux (misnamed) is hard-float (SP+DP) > > both are tested and work equally well ! > > What is not tested is hard-float + (SP only or DP only). Right, my question was why not restrict the glibc build for the only actually tested aand defined ABIs. I.e. to add a check on preconfigure to bail out if hard-float + (SP only or DP only).
On 7/3/20 10:11 AM, Adhemerval Zanella via Libc-alpha wrote: > > > On 03/07/2020 00:05, Vineet Gupta wrote: >> On 7/2/20 7:16 PM, Adhemerval Zanella via Libc-alpha wrote: >> >>>> >>>>> Is there a possibility >>>>> to compiler define just one of them? If so how should we handle it >>>>> on glibc? >>>> >>>> Technically yes. The differences would be in gcc codegen. There's no ARC hand >>>> written code which needs to handle that. Ofcourse we only test with >>>> -mcpu=hs38_linux which implies both SP and DP. >>> >>> Should we restrict the configure to require -mcpu=hs38_linux then? Or >>> gcc code gen will use soft-float and handle it transparently? >> >> no -mpcu or -mcpu=hs38 is soft-float >> -mcpu=hs38_linux (misnamed) is hard-float (SP+DP) >> >> both are tested and work equally well ! >> >> What is not tested is hard-float + (SP only or DP only). > > Right, my question was why not restrict the glibc build for the > only actually tested aand defined ABIs. I.e. to add a check on > preconfigure to bail out if hard-float + (SP only or DP only). Before disabling it, for grins, I tried to actually build this and it works ;-) Using -mcpu=hs38 -mfpu=fpus_all I can build a single precision only toolchain which works fine. Nothing needed to change in glibc, gcc generates the hard-float instructions for SP, and libgcc emulation for DP. So I guess this can be left as-is.
On 07/07/2020 17:23, Vineet Gupta wrote: > On 7/3/20 10:11 AM, Adhemerval Zanella via Libc-alpha wrote: >> >> >> On 03/07/2020 00:05, Vineet Gupta wrote: >>> On 7/2/20 7:16 PM, Adhemerval Zanella via Libc-alpha wrote: >>> >>>>> >>>>>> Is there a possibility >>>>>> to compiler define just one of them? If so how should we handle it >>>>>> on glibc? >>>>> >>>>> Technically yes. The differences would be in gcc codegen. There's no ARC hand >>>>> written code which needs to handle that. Ofcourse we only test with >>>>> -mcpu=hs38_linux which implies both SP and DP. >>>> >>>> Should we restrict the configure to require -mcpu=hs38_linux then? Or >>>> gcc code gen will use soft-float and handle it transparently? >>> >>> no -mpcu or -mcpu=hs38 is soft-float >>> -mcpu=hs38_linux (misnamed) is hard-float (SP+DP) >>> >>> both are tested and work equally well ! >>> >>> What is not tested is hard-float + (SP only or DP only). >> >> Right, my question was why not restrict the glibc build for the >> only actually tested aand defined ABIs. I.e. to add a check on >> preconfigure to bail out if hard-float + (SP only or DP only). > > Before disabling it, for grins, I tried to actually build this and it works ;-) > > Using -mcpu=hs38 -mfpu=fpus_all I can build a single precision only toolchain > which works fine. Nothing needed to change in glibc, gcc generates the hard-float > instructions for SP, and libgcc emulation for DP. So I guess this can be left as-is. > Ok, so I think there is no need to outline this on NEWS or add a configure check. Thanks for checking it.
diff --git a/sysdeps/arc/fpu/fclrexcpt.c b/sysdeps/arc/fpu/fclrexcpt.c new file mode 100644 index 000000000000..7653d99a008c --- /dev/null +++ b/sysdeps/arc/fpu/fclrexcpt.c @@ -0,0 +1,36 @@ +/* Clear given exceptions in current floating-point environment. + Copyright (C) 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..bbb3b477b423 --- /dev/null +++ b/sysdeps/arc/fpu/fegetenv.c @@ -0,0 +1,37 @@ +/* Store current floating-point environment. + Copyright (C) 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..f02c9119f222 --- /dev/null +++ b/sysdeps/arc/fpu/fegetmode.c @@ -0,0 +1,31 @@ +/* Store current floating-point control modes. + Copyright (C) 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..c5496bcbf7b4 --- /dev/null +++ b/sysdeps/arc/fpu/fegetround.c @@ -0,0 +1,32 @@ +/* Return current rounding direction. + Copyright (C) 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..59527ee25a66 --- /dev/null +++ b/sysdeps/arc/fpu/feholdexcpt.c @@ -0,0 +1,43 @@ +/* Store current floating-point environment and clear exceptions. + Copyright (C) 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..4ef858fc10a9 --- /dev/null +++ b/sysdeps/arc/fpu/fesetenv.c @@ -0,0 +1,48 @@ +/* Install given floating-point environment (doesnot raise exceptions). + Copyright (C) 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..77517d0b25ab --- /dev/null +++ b/sysdeps/arc/fpu/fesetexcept.c @@ -0,0 +1,32 @@ +/* Set given exception flags. + Copyright (C) 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..c4ea02d8d15b --- /dev/null +++ b/sysdeps/arc/fpu/fesetmode.c @@ -0,0 +1,40 @@ +/* Install given floating-point control modes. + Copyright (C) 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..701c0b2dcb42 --- /dev/null +++ b/sysdeps/arc/fpu/fesetround.c @@ -0,0 +1,40 @@ +/* Set current rounding direction. + Copyright (C) 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..c63aefb25463 --- /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) 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..a816121fd9b7 --- /dev/null +++ b/sysdeps/arc/fpu/fgetexcptflg.c @@ -0,0 +1,31 @@ +/* Store current representation for exceptions, ARC version. + Copyright (C) 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..067c0607784f --- /dev/null +++ b/sysdeps/arc/fpu/fraiseexcpt.c @@ -0,0 +1,39 @@ +/* Raise given exceptions. + Copyright (C) 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..f9e08d504418 --- /dev/null +++ b/sysdeps/arc/fpu/fsetexcptflg.c @@ -0,0 +1,38 @@ +/* Set floating-point environment exception handling, ARC version. + Copyright (C) 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..bb8ed27ab22b --- /dev/null +++ b/sysdeps/arc/fpu/ftestexcept.c @@ -0,0 +1,33 @@ +/* Test exception in current environment. + Copyright (C) 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/math-use-builtins-fma.h b/sysdeps/arc/fpu/math-use-builtins-fma.h new file mode 100644 index 000000000000..eede75aa41be --- /dev/null +++ b/sysdeps/arc/fpu/math-use-builtins-fma.h @@ -0,0 +1,4 @@ +#define USE_FMA_BUILTIN 1 +#define USE_FMAF_BUILTIN 1 +#define USE_FMAL_BUILTIN 0 +#define USE_FMAF128_BUILTIN 0 diff --git a/sysdeps/arc/fpu/math-use-builtins-sqrt.h b/sysdeps/arc/fpu/math-use-builtins-sqrt.h new file mode 100644 index 000000000000..e94c915ba66a --- /dev/null +++ b/sysdeps/arc/fpu/math-use-builtins-sqrt.h @@ -0,0 +1,4 @@ +#define USE_SQRT_BUILTIN 1 +#define USE_SQRTF_BUILTIN 1 +#define USE_SQRTL_BUILTIN 0 +#define USE_SQRTF128_BUILTIN 0 diff --git a/sysdeps/arc/fpu_control.h b/sysdeps/arc/fpu_control.h new file mode 100644 index 000000000000..64457972d637 --- /dev/null +++ b/sysdeps/arc/fpu_control.h @@ -0,0 +1,106 @@ +/* FPU control word bits. ARC version. + Copyright (C) 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..15173e37aa4f --- /dev/null +++ b/sysdeps/arc/get-rounding-mode.h @@ -0,0 +1,38 @@ +/* Determine floating-point rounding mode within libc. ARC version. + Copyright (C) 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..08b16f57976a --- /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) 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