b3fe158425
gcc: * config/i386/crtprec.c: Move to ../libgcc/config/i386. * config/i386/t-crtpc: Remove. * config/t-darwin (EXTRA_MULTILIB_PARTS): Remove. * config.gcc (i[34567]86-*-darwin*): Remove i386/t-crtpc from tmake_file. (x86_64-*-darwin*): Likewise. (i[34567]86-*-linux*): Likewise. (x86_64-*-linux*): Likewise. * config/i386/sol2.h (ENDFILE_SPEC): Redefine. Handle -mpc32, -mpc64, -mpc80. libgcc: * config/i386/crtprec.c: New file. * config/i386/t-crtpc: Use $(srcdir) to refer to crtprec.c. * config.host (i[34567]86-*-darwin*): Add i386/t-crtpc to tmake_file. Add crtprec32.o, crtprec64.o, crtprec80.o to extra_parts. (x86_64-*-darwin*): Likewise. (i[34567]86-*-solaris2*: Likewise. gcc/testsuite: * gcc.c-torture/execute/990127-2.x: Use -mpc64 on i?86-*-darwin*, i?86-*-solaris2*, x86_64-*-darwin*, x86_64-*-solaris2*. From-SVN: r176242
48 lines
1.5 KiB
C
48 lines
1.5 KiB
C
/*
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* Copyright (C) 2007, 2009 Free Software Foundation, Inc.
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*
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* This file is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 3, or (at your option) any
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* later version.
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*
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* This file is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* Under Section 7 of GPL version 3, you are granted additional
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* permissions described in the GCC Runtime Library Exception, version
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* 3.1, as published by the Free Software Foundation.
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*
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* You should have received a copy of the GNU General Public License and
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* a copy of the GCC Runtime Library Exception along with this program;
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* see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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* <http://www.gnu.org/licenses/>.
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*/
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#if __PREC == 32
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#define X87CW (0 << 8) /* Single precision (24 bits) */
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#elif __PREC == 64
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#define X87CW (2 << 8) /* Double precision (53 bits) */
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#elif __PREC == 80
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#define X87CW (3 << 8) /* Extended precision (64 bits) */
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#else
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#error "Wrong precision requested."
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#endif
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#define X87CW_PCMASK (3 << 8)
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static void __attribute__((constructor))
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set_precision (void)
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{
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unsigned short int cwd;
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asm volatile ("fstcw\t%0" : "=m" (cwd));
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cwd &= ~X87CW_PCMASK;
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cwd |= X87CW;
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asm volatile ("fldcw\t%0" : : "m" (cwd));
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}
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