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LoongArch: Hard Float Support for float-point classification functions.

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Use hardware Floating-point instruction fclass.{s/d} to implement
classification functions, i.e finite{f/ }, fpclassify{f/ }, isnan{f/ },
isinf{f/ }, issignaling{f/ }.

       *  sysdeps/loongarch/fpu/s_finite.c: New file.
       *  sysdeps/loongarch/fpu/s_finitef.c: Likewise.
       *  sysdeps/loongarch/fpu/s_fpclassify.c: Likewise.
       *  sysdeps/loongarch/fpu/s_fpclassifyf.c: Likewise.
       *  sysdeps/loongarch/fpu/s_isinf.c: Likewise.
       *  sysdeps/loongarch/fpu/s_isinff.c: Likewise.
       *  sysdeps/loongarch/fpu/s_isnan.c: Likewise.
       *  sysdeps/loongarch/fpu/s_isnanf.c: Likewise.
       *  sysdeps/loongarch/fpu/s_issignaling.c: Likewise.
       *  sysdeps/loongarch/fpu/s_issignalingf.c: Likewise.
       *  sysdeps/loongarch/fpu_control.h: Add _FCLASS_* macro.
This commit is contained in:
Xiaolin Tang 2022-11-07 22:05:16 +08:00 committed by caiyinyu
parent 56da6a073d
commit 5fe2647d31
11 changed files with 333 additions and 0 deletions
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30
sysdeps/loongarch/fpu/s_finite.c Normal file
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/* finite(). LoongArch version.
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 <math.h>
#include <fenv_private.h>
int
__finite (double x)
{
int x_cond;
asm volatile ("fclass.d \t%0, %1" : "=f" (x_cond) : "f" (x));
return x_cond & ~(_FCLASS_INF | _FCLASS_NAN);
}
hidden_def (__finite)
weak_alias (__finite, finite)

30
sysdeps/loongarch/fpu/s_finitef.c Normal file
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/* finitef(). LoongArch version.
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 <math.h>
#include <fenv_private.h>
int
__finitef (float x)
{
int x_cond;
asm volatile ("fclass.s \t%0, %1" : "=f" (x_cond) : "f" (x));
return x_cond & ~(_FCLASS_INF | _FCLASS_NAN);
}
hidden_def (__finitef)
weak_alias (__finitef, finitef)

38
sysdeps/loongarch/fpu/s_fpclassify.c Normal file
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/* fpclassify(). LoongArch version.
Copyright (C) 2017-2022 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 <math.h>
#include <fenv_private.h>
int
__fpclassify (double x)
{
int cls;
asm volatile ("fclass.d \t%0, %1" : "=f" (cls) : "f" (x));
if (__glibc_likely (!!(cls & _FCLASS_NORM)))
return FP_NORMAL;
if (__glibc_likely (!!(cls & _FCLASS_ZERO)))
return FP_ZERO;
if (__glibc_likely (!!(cls & _FCLASS_SUBNORM)))
return FP_SUBNORMAL;
if (__glibc_likely (!!(cls & _FCLASS_INF)))
return FP_INFINITE;
return FP_NAN;
}
libm_hidden_def (__fpclassify)

38
sysdeps/loongarch/fpu/s_fpclassifyf.c Normal file
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@ -0,0 +1,38 @@
/* Copyright (C) 2017-2022 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 <math.h>
#include <fenv_private.h>
int
__fpclassifyf (float x)
{
int cls;
asm volatile ("fclass.s \t%0, %1" : "=f" (cls) : "f" (x));
if (__glibc_likely (!!(cls & _FCLASS_NORM)))
return FP_NORMAL;
if (__glibc_likely (!!(cls & _FCLASS_ZERO)))
return FP_ZERO;
if (__glibc_likely (!!(cls & _FCLASS_SUBNORM)))
return FP_SUBNORMAL;
if (__glibc_likely (!!(cls & _FCLASS_INF)))
return FP_INFINITE;
return FP_NAN;
}
libm_hidden_def (__fpclassifyf)

30
sysdeps/loongarch/fpu/s_isinf.c Normal file
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/* isinf(). LoongArch version.
Copyright (C) 2017-2022 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 <math.h>
#include <fenv_private.h>
int
__isinf (double x)
{
int x_cond;
asm volatile ("fclass.d \t%0, %1" : "=f" (x_cond) : "f" (x));
return -((x_cond & _FCLASS_MINF) ? 1 : 0) | ((x_cond & _FCLASS_PINF) ? 1 : 0);
}
hidden_def (__isinf)
weak_alias (__isinf, isinf)

30
sysdeps/loongarch/fpu/s_isinff.c Normal file
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/* isinff(). LoongArch version.
Copyright (C) 2017-2022 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 <math.h>
#include <fenv_private.h>
int
__isinff (float x)
{
int x_cond;
asm volatile ("fclass.s \t%0, %1" : "=f" (x_cond) : "f" (x));
return -((x_cond & _FCLASS_MINF) ? 1 : 0) | ((x_cond & _FCLASS_PINF) ? 1 : 0);
}
hidden_def (__isinff)
weak_alias (__isinff, isinff)

31
sysdeps/loongarch/fpu/s_isnan.c Normal file
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@ -0,0 +1,31 @@
/* isnan(). LoongArch version.
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 <math.h>
#include <fenv_private.h>
int
__isnan (double x)
{
int x_cond;
asm volatile ("fclass.d \t%0, %1" : "=f" (x_cond) : "f" (x));
return (x_cond & _FCLASS_NAN) != 0;
}
hidden_def (__isnan)
weak_alias (__isnan, isnan)

31
sysdeps/loongarch/fpu/s_isnanf.c Normal file
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/* isnanf(). LoongArch version.
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 <math.h>
#include <fenv_private.h>
int
__isnanf (float x)
{
int x_cond;
asm volatile ("fclass.s \t%0, %1" : "=f" (x_cond) : "f" (x));
return (x_cond & _FCLASS_NAN) != 0;
}
hidden_def (__isnanf)
weak_alias (__isnanf, isnanf)

29
sysdeps/loongarch/fpu/s_issignaling.c Normal file
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/* issignaling(). LoongArch version.
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 <math.h>
#include <fenv_private.h>
int
__issignaling (double x)
{
int x_cond;
asm volatile ("fclass.d \t%0, %1" : "=f" (x_cond) : "f" (x));
return (x_cond & _FCLASS_SNAN) != 0;
}
libm_hidden_def (__issignaling)

29
sysdeps/loongarch/fpu/s_issignalingf.c Normal file
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@ -0,0 +1,29 @@
/* issignalingf(). LoongArch version.
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 <math.h>
#include <fenv_private.h>
int
__issignalingf (float x)
{
int x_cond;
asm volatile ("fclass.s \t%0, %1" : "=f" (x_cond) : "f" (x));
return (x_cond & _FCLASS_SNAN) != 0;
}
libm_hidden_def (__issignalingf)

17
sysdeps/loongarch/fpu_control.h
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@ -97,6 +97,23 @@ extern void __loongarch_fpu_setcw (fpu_control_t) __THROW;
/* Default control word set at startup. */
extern fpu_control_t __fpu_control;
# define _FCLASS_SNAN (1 << 0)
# define _FCLASS_QNAN (1 << 1)
# define _FCLASS_MINF (1 << 2)
# define _FCLASS_MNORM (1 << 3)
# define _FCLASS_MSUBNORM (1 << 4)
# define _FCLASS_MZERO (1 << 5)
# define _FCLASS_PINF (1 << 6)
# define _FCLASS_PNORM (1 << 7)
# define _FCLASS_PSUBNORM (1 << 8)
# define _FCLASS_PZERO (1 << 9)
# define _FCLASS_ZERO (_FCLASS_MZERO | _FCLASS_PZERO)
# define _FCLASS_SUBNORM (_FCLASS_MSUBNORM | _FCLASS_PSUBNORM)
# define _FCLASS_NORM (_FCLASS_MNORM | _FCLASS_PNORM)
# define _FCLASS_INF (_FCLASS_MINF | _FCLASS_PINF)
# define _FCLASS_NAN (_FCLASS_SNAN | _FCLASS_QNAN)
#endif /* __loongarch_soft_float */
#endif /* fpu_control.h */