diff options
Diffstat (limited to 'sysdeps/i386/bits')
| -rw-r--r-- | sysdeps/i386/bits/endian.h | 3 | ||||
| -rw-r--r-- | sysdeps/i386/bits/huge_val.h | 70 | ||||
| -rw-r--r-- | sysdeps/i386/bits/select.h | 57 | ||||
| -rw-r--r-- | sysdeps/i386/bits/setjmp.h | 19 |
4 files changed, 149 insertions, 0 deletions
diff --git a/sysdeps/i386/bits/endian.h b/sysdeps/i386/bits/endian.h new file mode 100644 index 0000000000..a5d6c5ea92 --- /dev/null +++ b/sysdeps/i386/bits/endian.h @@ -0,0 +1,3 @@ +/* i386 is little-endian. */ + +#define __BYTE_ORDER __LITTLE_ENDIAN diff --git a/sysdeps/i386/bits/huge_val.h b/sysdeps/i386/bits/huge_val.h new file mode 100644 index 0000000000..65a06d8f3c --- /dev/null +++ b/sysdeps/i386/bits/huge_val.h @@ -0,0 +1,70 @@ +/* `HUGE_VAL' constants for ix86 (where it is infinity). + Used by <stdlib.h> and <math.h> functions for overflow. + Copyright (C) 1992, 1995, 1996, 1997 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#ifndef _MATH_H +#error "Never use <bits/huge_val.h> directly; include <math.h> instead." +#endif + + +#include <features.h> +#include <sys/cdefs.h> + +/* IEEE positive infinity (-HUGE_VAL is negative infinity). */ + +#define __HUGE_VAL_bytes { 0, 0, 0, 0, 0, 0, 0xf0, 0x7f } + +#define __huge_val_t union { unsigned char __c[8]; double __d; } +#ifdef __GNUC__ +#define HUGE_VAL (__extension__ \ + ((__huge_val_t) { __c: __HUGE_VAL_bytes }).__d) +#else /* Not GCC. */ +static __huge_val_t __huge_val = { __HUGE_VAL_bytes }; +#define HUGE_VAL (__huge_val.__d) +#endif /* GCC. */ + + +/* ISO C 9X extensions: (float) HUGE_VALF and (long double) HUGE_VALL. */ + +#ifdef __USE_ISOC9X + +#define __HUGE_VALF_bytes { 0, 0, 0x80, 0x7f } + +#define __huge_valf_t union { unsigned char __c[4]; float __f; } +#ifdef __GNUC__ +#define HUGE_VALF (__extension__ \ + ((__huge_valf_t) { __c: __HUGE_VALF_bytes }).__f) +#else /* Not GCC. */ +static __huge_valf_t __huge_valf = { __HUGE_VALF_bytes }; +#define HUGE_VALF (__huge_valf.__f) +#endif /* GCC. */ + + +#define __HUGE_VALL_bytes { 0, 0, 0, 0, 0, 0, 0, 0x80, 0xff, 0x7f, 0, 0 } + +#define __huge_vall_t union { unsigned char __c[12]; long double __ld; } +#ifdef __GNUC__ +#define HUGE_VALL (__extension__ \ + ((__huge_vall_t) { __c: __HUGE_VALL_bytes }).__ld) +#else /* Not GCC. */ +static __huge_vall_t __huge_vall = { __HUGE_VALL_bytes }; +#define HUGE_VALL (__huge_vall.__ld) +#endif /* GCC. */ + +#endif /* __USE_ISOC9X. */ diff --git a/sysdeps/i386/bits/select.h b/sysdeps/i386/bits/select.h new file mode 100644 index 0000000000..3912515a7f --- /dev/null +++ b/sysdeps/i386/bits/select.h @@ -0,0 +1,57 @@ +/* Copyright (C) 1997 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#ifndef _SYS_SELECT_H +#error "Never use <bits/select.h> directly; include <sys/select.h> instead." +#endif + + +#if defined __GNUC__ && __GNUC__ >= 2 + +#define __FD_ZERO(fdsetp) \ + __asm__ __volatile__ ("cld ; rep ; stosl" \ + : "=m" (*(__fd_set *) (fdsetp)) \ + : "a" (0), "c" (sizeof (__fd_set) \ + / sizeof (__fd_mask)), \ + "D" ((__fd_set *) (fdsetp)) \ + :"cx","di") +#define __FD_SET(fd, fdsetp) \ + __asm__ __volatile__ ("btsl %1,%0" \ + : "=m" (*(__fd_set *) (fdsetp)) \ + : "r" ((int) (fd))) +#define __FD_CLR(fd, fdsetp) \ + __asm__ __volatile__ ("btrl %1,%0" \ + : "=m" (*(__fd_set *) (fdsetp)) \ + : "r" ((int) (fd))) +#define __FD_ISSET(fd, fdsetp) \ + (__extension__ \ + ({unsigned char __result; \ + __asm__ __volatile__ ("btl %1,%2 ; setb %0" \ + : "=q" (__result) \ + : "r" ((int) (fd)), "m" (*(__fd_set *) (fdsetp))); \ + __result; })) + +#else /* ! GNU CC */ + +#define __FD_ZERO(set) \ + ((void) memset ((__ptr_t) (set), 0, sizeof (fd_set))) +#define __FD_SET(d, set) ((set)->fds_bits[__FDELT(d)] |= __FDMASK(d)) +#define __FD_CLR(d, set) ((set)->fds_bits[__FDELT(d)] &= ~__FDMASK(d)) +#define __FD_ISSET(d, set) ((set)->fds_bits[__FDELT(d)] & __FDMASK(d)) + +#endif /* GNU CC */ diff --git a/sysdeps/i386/bits/setjmp.h b/sysdeps/i386/bits/setjmp.h new file mode 100644 index 0000000000..0c03073b36 --- /dev/null +++ b/sysdeps/i386/bits/setjmp.h @@ -0,0 +1,19 @@ +/* Define the machine-dependent type `jmp_buf'. Intel 386 version. */ + +#if defined (__USE_MISC) || defined (_ASM) +#define JB_BX 0 +#define JB_SI 1 +#define JB_DI 2 +#define JB_BP 3 +#define JB_SP 4 +#define JB_PC 5 +#endif + +#ifndef _ASM +typedef int __jmp_buf[6]; +#endif + +/* Test if longjmp to JMPBUF would unwind the frame + containing a local variable at ADDRESS. */ +#define _JMPBUF_UNWINDS(jmpbuf, address) \ + ((int) (address) < (jmpbuf)[JB_SP]) |