vasilito
068a1ca63e
Bootloader fork rebase:
- Base changed from 0.1.0 pre-patched archive to upstream 1.0.0 tag (c7eeb9f)
- Applied 0001-redbear-local-forks.patch (Cargo.toml crate path redirects)
- Applied fix-uefi-alloc-panic.patch equivalents (4 panic!() -> graceful
error handling in src/main.rs)
- Applied P5-live-preload-cap-1gib.patch (1 GiB cap on live image preload)
- Skipped: P0 GPT partition scan (requires new module + integration),
P1 timeout/default-resolution, P2 live preload guard (subsumed by
panic fixes + cap), P3 live image safe read, P4 large ISO boot,
redox.patch — to be applied in dedicated rebase session.
firmware-loader/Cargo.toml: version 0.1.0 -> 0.3.0 (sync with other
Red Bear custom crates which are at 0.3.0).
fork-upstream-map.toml: bootloader back from PENDING_REBASE to 1.0.0
since the partial rebase matches upstream 1.0.0 content.
fork-upstream-map.toml: base restored to 'main' tracked (was correctly
tracked by build-redbear.sh).
139 lines
3.7 KiB
C
139 lines
3.7 KiB
C
/* Macros for quiet not-a-number.
|
|
Copyright (C) 2023-2025 Free Software Foundation, Inc.
|
|
|
|
This file 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.
|
|
|
|
This file 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 this program. If not, see <https://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef _SIGNED_NAN_H
|
|
#define _SIGNED_NAN_H
|
|
|
|
#include <math.h>
|
|
|
|
#include "nan.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
|
|
/* Returns - x, implemented by inverting the sign bit,
|
|
so that it works also on 'float' NaN values. */
|
|
_GL_UNUSED static float
|
|
minus_NaNf (float x)
|
|
{
|
|
#if defined __mips__
|
|
/* The mips instruction neg.s may have no effect on NaNs.
|
|
Therefore, invert the sign bit using integer operations. */
|
|
union { unsigned int i; float value; } u;
|
|
u.value = x;
|
|
u.i ^= 1U << 31;
|
|
return u.value;
|
|
#else
|
|
return - x;
|
|
#endif
|
|
}
|
|
|
|
/* Returns a quiet 'float' NaN with sign bit == 0. */
|
|
_GL_UNUSED static float
|
|
positive_NaNf ()
|
|
{
|
|
/* 'volatile' works around a GCC bug:
|
|
<https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111655> */
|
|
float volatile nan = NaNf ();
|
|
return (signbit (nan) ? minus_NaNf (nan) : nan);
|
|
}
|
|
|
|
/* Returns a quiet 'float' NaN with sign bit == 1. */
|
|
_GL_UNUSED static float
|
|
negative_NaNf ()
|
|
{
|
|
/* 'volatile' works around a GCC bug:
|
|
<https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111655> */
|
|
float volatile nan = NaNf ();
|
|
return (signbit (nan) ? nan : minus_NaNf (nan));
|
|
}
|
|
|
|
|
|
/* Returns - x, implemented by inverting the sign bit,
|
|
so that it works also on 'double' NaN values. */
|
|
_GL_UNUSED static double
|
|
minus_NaNd (double x)
|
|
{
|
|
#if defined __mips__
|
|
/* The mips instruction neg.d may have no effect on NaNs.
|
|
Therefore, invert the sign bit using integer operations. */
|
|
union { unsigned long long i; double value; } u;
|
|
u.value = x;
|
|
u.i ^= 1ULL << 63;
|
|
return u.value;
|
|
#else
|
|
return - x;
|
|
#endif
|
|
}
|
|
|
|
/* Returns a quiet 'double' NaN with sign bit == 0. */
|
|
_GL_UNUSED static double
|
|
positive_NaNd ()
|
|
{
|
|
/* 'volatile' works around a GCC bug:
|
|
<https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111655> */
|
|
double volatile nan = NaNd ();
|
|
return (signbit (nan) ? minus_NaNd (nan) : nan);
|
|
}
|
|
|
|
/* Returns a quiet 'double' NaN with sign bit == 1. */
|
|
_GL_UNUSED static double
|
|
negative_NaNd ()
|
|
{
|
|
/* 'volatile' works around a GCC bug:
|
|
<https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111655> */
|
|
double volatile nan = NaNd ();
|
|
return (signbit (nan) ? nan : minus_NaNd (nan));
|
|
}
|
|
|
|
|
|
/* Returns - x, implemented by inverting the sign bit,
|
|
so that it works also on 'long double' NaN values. */
|
|
_GL_UNUSED static long double
|
|
minus_NaNl (long double x)
|
|
{
|
|
return - x;
|
|
}
|
|
|
|
/* Returns a quiet 'long double' NaN with sign bit == 0. */
|
|
_GL_UNUSED static long double
|
|
positive_NaNl ()
|
|
{
|
|
/* 'volatile' works around a GCC bug:
|
|
<https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111655> */
|
|
long double volatile nan = NaNl ();
|
|
return (signbit (nan) ? minus_NaNl (nan) : nan);
|
|
}
|
|
|
|
/* Returns a quiet 'long double' NaN with sign bit == 1. */
|
|
_GL_UNUSED static long double
|
|
negative_NaNl ()
|
|
{
|
|
/* 'volatile' works around a GCC bug:
|
|
<https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111655> */
|
|
long double volatile nan = NaNl ();
|
|
return (signbit (nan) ? nan : minus_NaNl (nan));
|
|
}
|
|
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* _SIGNED_NAN_H */
|