mirror of
https://sourceware.org/git/glibc.git
synced 2025-10-31 22:10:34 +03:00
2b778ceb40
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 6694 files FOO. I then removed trailing white space from benchtests/bench-pthread-locks.c and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this diagnostic from Savannah: remote: *** pre-commit check failed ... remote: *** error: lines with trailing whitespace found remote: error: hook declined to update refs/heads/master
115 lines
3.7 KiB
C
115 lines
3.7 KiB
C
/* FPU control word definitions. PowerPC version.
|
|
Copyright (C) 1996-2021 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
|
|
|
|
#if defined __SPE__ || (defined __NO_FPRS__ && !defined _SOFT_FLOAT)
|
|
# error "SPE/e500 is no longer supported"
|
|
#endif
|
|
|
|
#ifdef _SOFT_FLOAT
|
|
|
|
# define _FPU_RESERVED 0xffffffff
|
|
# define _FPU_DEFAULT 0x00000000 /* Default value. */
|
|
typedef unsigned int fpu_control_t;
|
|
# define _FPU_GETCW(cw) (cw) = 0
|
|
# define _FPU_SETCW(cw) (void) (cw)
|
|
extern fpu_control_t __fpu_control;
|
|
|
|
#else /* PowerPC 6xx floating-point. */
|
|
|
|
/* rounding control */
|
|
# define _FPU_RC_NEAREST 0x00 /* RECOMMENDED */
|
|
# define _FPU_RC_DOWN 0x03
|
|
# define _FPU_RC_UP 0x02
|
|
# define _FPU_RC_ZERO 0x01
|
|
|
|
# define _FPU_MASK_RC (_FPU_RC_NEAREST|_FPU_RC_DOWN|_FPU_RC_UP|_FPU_RC_ZERO)
|
|
|
|
# define _FPU_MASK_NI 0x04 /* non-ieee mode */
|
|
|
|
/* masking of interrupts */
|
|
# define _FPU_MASK_ZM 0x10 /* zero divide */
|
|
# define _FPU_MASK_OM 0x40 /* overflow */
|
|
# define _FPU_MASK_UM 0x20 /* underflow */
|
|
# define _FPU_MASK_XM 0x08 /* inexact */
|
|
# define _FPU_MASK_IM 0x80 /* invalid operation */
|
|
|
|
# define _FPU_RESERVED 0xffffff00 /* These bits are reserved are not changed. */
|
|
|
|
/* The fdlibm code requires no interrupts for exceptions. */
|
|
# define _FPU_DEFAULT 0x00000000 /* Default value. */
|
|
|
|
/* IEEE: same as above, but (some) exceptions;
|
|
we leave the 'inexact' exception off.
|
|
*/
|
|
# define _FPU_IEEE 0x000000f0
|
|
|
|
/* Type of the control word. */
|
|
typedef unsigned int fpu_control_t;
|
|
|
|
/* Macros for accessing the hardware control word. */
|
|
# define _FPU_GETCW(cw) \
|
|
({union { double __d; unsigned long long __ll; } __u; \
|
|
__asm__ __volatile__("mffs %0" : "=f" (__u.__d)); \
|
|
(cw) = (fpu_control_t) __u.__ll; \
|
|
(fpu_control_t) __u.__ll; \
|
|
})
|
|
|
|
# define _FPU_GET_RC_ISA300() \
|
|
({union { double __d; unsigned long long __ll; } __u; \
|
|
__asm__ __volatile__( \
|
|
".machine push; .machine \"power9\"; mffsl %0; .machine pop" \
|
|
: "=f" (__u.__d)); \
|
|
(fpu_control_t) (__u.__ll & _FPU_MASK_RC); \
|
|
})
|
|
|
|
# ifdef _ARCH_PWR9
|
|
# define _FPU_GET_RC() _FPU_GET_RC_ISA300()
|
|
# elif defined __BUILTIN_CPU_SUPPORTS__
|
|
# define _FPU_GET_RC() \
|
|
({fpu_control_t __rc; \
|
|
__rc = __glibc_likely (__builtin_cpu_supports ("arch_3_00")) \
|
|
? _FPU_GET_RC_ISA300 () \
|
|
: _FPU_GETCW (__rc) & _FPU_MASK_RC; \
|
|
__rc; \
|
|
})
|
|
# else
|
|
# define _FPU_GET_RC() \
|
|
({fpu_control_t __rc = _FPU_GETCW (__rc) & _FPU_MASK_RC; \
|
|
__rc; \
|
|
})
|
|
# endif
|
|
|
|
# define _FPU_SETCW(cw) \
|
|
{ union { double __d; unsigned long long __ll; } __u; \
|
|
register double __fr; \
|
|
__u.__ll = 0xfff80000LL << 32; /* This is a QNaN. */ \
|
|
__u.__ll |= (cw) & 0xffffffffLL; \
|
|
__fr = __u.__d; \
|
|
__asm__ __volatile__("mtfsf 255,%0" : : "f" (__fr)); \
|
|
}
|
|
|
|
/* Default control word set at startup. */
|
|
extern fpu_control_t __fpu_control;
|
|
|
|
#endif /* PowerPC 6xx floating-point. */
|
|
|
|
#endif /* _FPU_CONTROL_H */
|