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LoongArch: Hard Float Support

This commit is contained in:
caiyinyu 2022-07-19 09:22:08 +08:00 committed by Adhemerval Zanella
parent 3d87c89815
commit 68d61026d5
22 changed files with 2372 additions and 0 deletions
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46
sysdeps/loongarch/fpu/fclrexcpt.c Normal file
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/* Clear given exceptions in current floating-point environment.
Copyright (C) 2022 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_libc.h>
#include <fpu_control.h>
int
feclearexcept (int excepts)
{
int cw;
/* Mask out unsupported bits/exceptions. */
excepts &= FE_ALL_EXCEPT;
/* Read the complete control word. */
_FPU_GETCW (cw);
/* Clear exception flag bits and cause bits. If the cause bit is not
cleared, the next CTC instruction (just below) will re-generate the
exception. */
cw &= ~(excepts | (excepts << CAUSE_SHIFT));
/* Put the new data in effect. */
_FPU_SETCW (cw);
/* Success. */
return 0;
}
libm_hidden_def (feclearexcept)

39
sysdeps/loongarch/fpu/fedisblxcpt.c Normal file
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/* Disable floating-point exceptions.
Copyright (C) 2022 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_libc.h>
#include <fpu_control.h>
int
fedisableexcept (int excepts)
{
unsigned int new_exc, old_exc;
/* Get the current control word. */
_FPU_GETCW (new_exc);
old_exc = (new_exc & ENABLE_MASK) << ENABLE_SHIFT;
excepts &= FE_ALL_EXCEPT;
new_exc &= ~(excepts >> ENABLE_SHIFT);
_FPU_SETCW (new_exc);
return old_exc;
}

39
sysdeps/loongarch/fpu/feenablxcpt.c Normal file
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/* Enable floating-point exceptions.
Copyright (C) 2022 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_libc.h>
#include <fpu_control.h>
int
feenableexcept (int excepts)
{
unsigned int new_exc, old_exc;
/* Get the current control word. */
_FPU_GETCW (new_exc);
old_exc = (new_exc & ENABLE_MASK) << ENABLE_SHIFT;
excepts &= FE_ALL_EXCEPT;
new_exc |= excepts >> ENABLE_SHIFT;
_FPU_SETCW (new_exc);
return old_exc;
}

31
sysdeps/loongarch/fpu/fegetenv.c Normal file
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/* Store current floating-point environment.
Copyright (C) 2022 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)
{
_FPU_GETCW (*envp);
/* Success. */
return 0;
}
libm_hidden_def (__fegetenv) weak_alias (__fegetenv, fegetenv)
libm_hidden_weak (fegetenv)

32
sysdeps/loongarch/fpu/fegetexcept.c Normal file
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/* Get enabled floating-point exceptions.
Copyright (C) 2022 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_libc.h>
#include <fpu_control.h>
int
fegetexcept (void)
{
unsigned int exc;
/* Get the current control word. */
_FPU_GETCW (exc);
return (exc & ENABLE_MASK) << ENABLE_SHIFT;
}

27
sysdeps/loongarch/fpu/fegetmode.c Normal file
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/* Store current floating-point control modes.
Copyright (C) 2022 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)
{
_FPU_GETCW (*modep);
return 0;
}

33
sysdeps/loongarch/fpu/fegetround.c Normal file
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/* Return current rounding direction.
Copyright (C) 2022 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
__fegetround (void)
{
int cw;
/* Get control word. */
_FPU_GETCW (cw);
return cw & _FPU_RC_MASK;
}
libm_hidden_def (__fegetround) weak_alias (__fegetround, fegetround)
libm_hidden_weak (fegetround)

40
sysdeps/loongarch/fpu/feholdexcpt.c Normal file
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/* Store current floating-point environment and clear exceptions.
Copyright (C) 2022 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
__feholdexcept (fenv_t *envp)
{
fpu_control_t cw;
/* Save the current state. */
_FPU_GETCW (cw);
envp->__fp_control_register = cw;
/* Clear all exception enable bits and flags. */
cw &= ~(_FPU_MASK_V | _FPU_MASK_Z | _FPU_MASK_O | _FPU_MASK_U | _FPU_MASK_I
| FE_ALL_EXCEPT);
_FPU_SETCW (cw);
return 0;
}
libm_hidden_def (__feholdexcept) weak_alias (__feholdexcept, feholdexcept)
libm_hidden_weak (feholdexcept)

30
sysdeps/loongarch/fpu/fenv_libc.h Normal file
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/* Internal libc stuff for floating point environment routines.
Copyright (C) 2022 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 _FENV_LIBC_H
#define _FENV_LIBC_H 1
/* Mask for enabling exceptions and for the CAUSE bits. */
#define ENABLE_MASK 0x0000001FU
#define CAUSE_MASK 0x1F000000U
/* Shift for FE_* flags to get up to the ENABLE bits and the CAUSE bits. */
#define ENABLE_SHIFT 16
#define CAUSE_SHIFT 8
#endif /* _FENV_LIBC_H */

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sysdeps/loongarch/fpu/fesetenv.c Normal file
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/* Install given floating-point environment.
Copyright (C) 2022 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)
{
fpu_control_t cw;
/* Read first current state to flush fpu pipeline. */
_FPU_GETCW (cw);
if (envp == FE_DFL_ENV)
_FPU_SETCW (_FPU_DEFAULT);
else if (envp == FE_NOMASK_ENV)
_FPU_SETCW (_FPU_IEEE);
else
_FPU_SETCW (envp->__fp_control_register);
/* Success. */
return 0;
}
libm_hidden_def (__fesetenv) weak_alias (__fesetenv, fesetenv)
libm_hidden_weak (fesetenv)

32
sysdeps/loongarch/fpu/fesetexcept.c Normal file
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/* Set given exception flags.
Copyright (C) 2022 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)
{
fpu_control_t temp;
_FPU_GETCW (temp);
temp |= excepts & FE_ALL_EXCEPT;
_FPU_SETCW (temp);
return 0;
}

38
sysdeps/loongarch/fpu/fesetmode.c Normal file
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/* Install given floating-point control modes.
Copyright (C) 2022 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>
#define FCSR_STATUS 0x1f1f0000
int
fesetmode (const femode_t *modep)
{
fpu_control_t cw;
_FPU_GETCW (cw);
cw &= FCSR_STATUS;
if (modep == FE_DFL_MODE)
cw |= _FPU_DEFAULT;
else
cw |= *modep & ~FCSR_STATUS;
_FPU_SETCW (cw);
return 0;
}

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sysdeps/loongarch/fpu/fesetround.c Normal file
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/* Set current rounding direction.
Copyright (C) 2022 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
__fesetround (int round)
{
fpu_control_t cw;
if ((round & ~_FPU_RC_MASK) != 0)
/* ROUND is no valid rounding mode. */
return 1;
/* Get current state. */
_FPU_GETCW (cw);
/* Set rounding bits. */
cw &= ~_FPU_RC_MASK;
cw |= round;
/* Set new state. */
_FPU_SETCW (cw);
return 0;
}
libm_hidden_def (__fesetround) weak_alias (__fesetround, fesetround)
libm_hidden_weak (fesetround)

43
sysdeps/loongarch/fpu/feupdateenv.c Normal file
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/* Install given floating-point environment and raise exceptions.
Copyright (C) 2022 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)
{
int temp;
/* Save current exceptions. */
_FPU_GETCW (temp);
temp &= FE_ALL_EXCEPT;
/* Install new environment. */
__fesetenv (envp);
/* Raise the safed exception. Incidently for us the implementation
defined format of the values in objects of type fexcept_t is the
same as the ones specified using the FE_* constants. */
__feraiseexcept (temp);
/* Success. */
return 0;
}
libm_hidden_def (__feupdateenv) weak_alias (__feupdateenv, feupdateenv)
libm_hidden_weak (feupdateenv)

38
sysdeps/loongarch/fpu/fgetexcptflg.c Normal file
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/* Store current representation for exceptions.
Copyright (C) 2022 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
fegetexceptflag (fexcept_t *flagp, int excepts)
{
fpu_control_t temp;
/* Get the current exceptions. */
_FPU_GETCW (temp);
/* We only save the relevant bits here. In particular, care has to be
taken with the CAUSE bits, as an inadvertent restore later on could
generate unexpected exceptions. */
*flagp = temp & excepts & FE_ALL_EXCEPT;
/* Success. */
return 0;
}

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sysdeps/loongarch/fpu/fraiseexcpt.c Normal file
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/* Raise given exceptions.
Copyright (C) 2022 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>
int
__feraiseexcept (int excepts)
{
const float fp_zero = 0.0f;
const float fp_one = 1.0f;
const float fp_max = FLT_MAX;
const float fp_min = FLT_MIN;
const float fp_1e32 = 1.0e32f;
const float fp_two = 2.0f;
const float fp_three = 3.0f;
/* Raise exceptions represented by EXPECTS. But we must raise only
one signal at a time. It is important that if the overflow/underflow
exception and the inexact exception are given at the same time,
the overflow/underflow exception follows the inexact exception. */
/* First: invalid exception. */
if (FE_INVALID & excepts)
__asm__ __volatile__("fdiv.s $f0,%0,%0\n\t"
:
: "f"(fp_zero)
: "$f0");
/* Next: division by zero. */
if (FE_DIVBYZERO & excepts)
__asm__ __volatile__("fdiv.s $f0,%0,%1\n\t"
:
: "f"(fp_one), "f"(fp_zero)
: "$f0");
/* Next: overflow. */
if (FE_OVERFLOW & excepts)
/* There's no way to raise overflow without also raising inexact. */
__asm__ __volatile__("fadd.s $f0,%0,%1\n\t"
:
: "f"(fp_max), "f"(fp_1e32)
: "$f0");
/* Next: underflow. */
if (FE_UNDERFLOW & excepts)
__asm__ __volatile__("fdiv.s $f0,%0,%1\n\t"
:
: "f"(fp_min), "f"(fp_three)
: "$f0");
/* Last: inexact. */
if (FE_INEXACT & excepts)
__asm__ __volatile__("fdiv.s $f0, %0, %1\n\t"
:
: "f"(fp_two), "f"(fp_three)
: "$f0");
/* Success. */
return 0;
}
libm_hidden_def (__feraiseexcept) weak_alias (__feraiseexcept, feraiseexcept)
libm_hidden_weak (feraiseexcept)

41
sysdeps/loongarch/fpu/fsetexcptflg.c Normal file
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/* Set floating-point environment exception handling.
Copyright (C) 2022 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)
{
fpu_control_t temp;
/* Get the current exceptions. */
_FPU_GETCW (temp);
/* Make sure the flags we want restored are legal. */
excepts &= FE_ALL_EXCEPT;
/* Now clear the bits called for, and copy them in from flagp. Note that
we ignore all non-flag bits from *flagp, so they don't matter. */
temp = (temp & ~excepts) | (*flagp & excepts);
_FPU_SETCW (temp);
/* Success. */
return 0;
}

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sysdeps/loongarch/fpu/ftestexcept.c Normal file
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/* Test exception in current environment.
Copyright (C) 2022 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
fetestexcept (int excepts)
{
int cw;
/* Get current control word. */
_FPU_GETCW (cw);
return cw & excepts & FE_ALL_EXCEPT;
}
libm_hidden_def (fetestexcept)

4
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#define USE_SQRT_BUILTIN 1
#define USE_SQRTF_BUILTIN 1
#define USE_SQRTL_BUILTIN 0
#define USE_SQRTF128_BUILTIN 0

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LoongArch 64-bit

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/* Internal math stuff.
Copyright (C) 2022 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 LOONGARCH_MATH_PRIVATE_H
#define LOONGARCH_MATH_PRIVATE_H 1
/* Inline functions to speed up the math library implementation. The
default versions of these routines are in generic/math_private.h
and call fesetround, feholdexcept, etc. These routines use inlined
code instead. */
#ifdef __loongarch_hard_float
#include <fenv.h>
#include <fenv_libc.h>
#include <fpu_control.h>
#define _FPU_MASK_ALL \
(_FPU_MASK_V | _FPU_MASK_Z | _FPU_MASK_O | _FPU_MASK_U | _FPU_MASK_I \
| FE_ALL_EXCEPT)
static __always_inline void
libc_feholdexcept_loongarch (fenv_t *envp)
{
fpu_control_t cw;
/* Save the current state. */
_FPU_GETCW (cw);
envp->__fp_control_register = cw;
/* Clear all exception enable bits and flags. */
cw &= ~(_FPU_MASK_ALL);
_FPU_SETCW (cw);
}
#define libc_feholdexcept libc_feholdexcept_loongarch
#define libc_feholdexceptf libc_feholdexcept_loongarch
#define libc_feholdexceptl libc_feholdexcept_loongarch
static __always_inline void
libc_fesetround_loongarch (int round)
{
fpu_control_t cw;
/* Get current state. */
_FPU_GETCW (cw);
/* Set rounding bits. */
cw &= ~_FPU_RC_MASK;
cw |= round;
/* Set new state. */
_FPU_SETCW (cw);
}
#define libc_fesetround libc_fesetround_loongarch
#define libc_fesetroundf libc_fesetround_loongarch
#define libc_fesetroundl libc_fesetround_loongarch
static __always_inline void
libc_feholdexcept_setround_loongarch (fenv_t *envp, int round)
{
fpu_control_t cw;
/* Save the current state. */
_FPU_GETCW (cw);
envp->__fp_control_register = cw;
/* Clear all exception enable bits and flags. */
cw &= ~(_FPU_MASK_ALL);
/* Set rounding bits. */
cw &= ~_FPU_RC_MASK;
cw |= round;
/* Set new state. */
_FPU_SETCW (cw);
}
#define libc_feholdexcept_setround libc_feholdexcept_setround_loongarch
#define libc_feholdexcept_setroundf libc_feholdexcept_setround_loongarch
#define libc_feholdexcept_setroundl libc_feholdexcept_setround_loongarch
#define libc_feholdsetround libc_feholdexcept_setround_loongarch
#define libc_feholdsetroundf libc_feholdexcept_setround_loongarch
#define libc_feholdsetroundl libc_feholdexcept_setround_loongarch
static __always_inline void
libc_fesetenv_loongarch (fenv_t *envp)
{
fpu_control_t cw __attribute__ ((unused));
/* Read current state to flush fpu pipeline. */
_FPU_GETCW (cw);
_FPU_SETCW (envp->__fp_control_register);
}
#define libc_fesetenv libc_fesetenv_loongarch
#define libc_fesetenvf libc_fesetenv_loongarch
#define libc_fesetenvl libc_fesetenv_loongarch
static __always_inline int
libc_feupdateenv_test_loongarch (fenv_t *envp, int excepts)
{
/* int ret = fetestexcept (excepts); feupdateenv (envp); return ret; */
int cw, temp;
/* Get current control word. */
_FPU_GETCW (cw);
/* Set flag bits (which are accumulative), and *also* set the
cause bits. The setting of the cause bits is what actually causes
the hardware to generate the exception, if the corresponding enable
bit is set as well. */
temp = cw & FE_ALL_EXCEPT;
temp |= envp->__fp_control_register | (temp << CAUSE_SHIFT);
/* Set new state. */
_FPU_SETCW (temp);
return cw & excepts & FE_ALL_EXCEPT;
}
#define libc_feupdateenv_test libc_feupdateenv_test_loongarch
#define libc_feupdateenv_testf libc_feupdateenv_test_loongarch
#define libc_feupdateenv_testl libc_feupdateenv_test_loongarch
static __always_inline void
libc_feupdateenv_loongarch (fenv_t *envp)
{
libc_feupdateenv_test_loongarch (envp, 0);
}
#define libc_feupdateenv libc_feupdateenv_loongarch
#define libc_feupdateenvf libc_feupdateenv_loongarch
#define libc_feupdateenvl libc_feupdateenv_loongarch
#define libc_feresetround libc_feupdateenv_loongarch
#define libc_feresetroundf libc_feupdateenv_loongarch
#define libc_feresetroundl libc_feupdateenv_loongarch
static __always_inline int
libc_fetestexcept_loongarch (int excepts)
{
int cw;
/* Get current control word. */
_FPU_GETCW (cw);
return cw & excepts & FE_ALL_EXCEPT;
}
#define libc_fetestexcept libc_fetestexcept_loongarch
#define libc_fetestexceptf libc_fetestexcept_loongarch
#define libc_fetestexceptl libc_fetestexcept_loongarch
/* Enable support for rounding mode context. */
#define HAVE_RM_CTX 1
static __always_inline void
libc_feholdexcept_setround_loongarch_ctx (struct rm_ctx *ctx, int round)
{
fpu_control_t old, new;
/* Save the current state. */
_FPU_GETCW (old);
ctx->env.__fp_control_register = old;
/* Clear all exception enable bits and flags. */
new = old & ~(_FPU_MASK_ALL);
/* Set rounding bits. */
new = (new & ~_FPU_RC_MASK) | round;
if (__glibc_unlikely (new != old))
{
_FPU_SETCW (new);
ctx->updated_status = true;
}
else
ctx->updated_status = false;
}
#define libc_feholdexcept_setround_ctx libc_feholdexcept_setround_loongarch_ctx
#define libc_feholdexcept_setroundf_ctx \
libc_feholdexcept_setround_loongarch_ctx
#define libc_feholdexcept_setroundl_ctx \
libc_feholdexcept_setround_loongarch_ctx
static __always_inline void
libc_fesetenv_loongarch_ctx (struct rm_ctx *ctx)
{
libc_fesetenv_loongarch (&ctx->env);
}
#define libc_fesetenv_ctx libc_fesetenv_loongarch_ctx
#define libc_fesetenvf_ctx libc_fesetenv_loongarch_ctx
#define libc_fesetenvl_ctx libc_fesetenv_loongarch_ctx
static __always_inline void
libc_feupdateenv_loongarch_ctx (struct rm_ctx *ctx)
{
if (__glibc_unlikely (ctx->updated_status))
libc_feupdateenv_test_loongarch (&ctx->env, 0);
}
#define libc_feupdateenv_ctx libc_feupdateenv_loongarch_ctx
#define libc_feupdateenvf_ctx libc_feupdateenv_loongarch_ctx
#define libc_feupdateenvl_ctx libc_feupdateenv_loongarch_ctx
#define libc_feresetround_ctx libc_feupdateenv_loongarch_ctx
#define libc_feresetroundf_ctx libc_feupdateenv_loongarch_ctx
#define libc_feresetroundl_ctx libc_feupdateenv_loongarch_ctx
static __always_inline void
libc_feholdsetround_loongarch_ctx (struct rm_ctx *ctx, int round)
{
fpu_control_t old, new;
/* Save the current state. */
_FPU_GETCW (old);
ctx->env.__fp_control_register = old;
/* Set rounding bits. */
new = (old & ~_FPU_RC_MASK) | round;
if (__glibc_unlikely (new != old))
{
_FPU_SETCW (new);
ctx->updated_status = true;
}
else
ctx->updated_status = false;
}
#define libc_feholdsetround_ctx libc_feholdsetround_loongarch_ctx
#define libc_feholdsetroundf_ctx libc_feholdsetround_loongarch_ctx
#define libc_feholdsetroundl_ctx libc_feholdsetround_loongarch_ctx
#endif
#include_next <math_private.h>
#endif