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2008-11-13 Ryan S. Arnold <rsa@us.ibm.com> [BZ #6411] * sysdeps/powerpc/fpu/Makefile: Added test case tst-setcontext-fpscr. * sysdeps/powerpc/fpu/feholdexcpt.c (_FPU_MASK_ALL): Define to replace magic numbers. * sysdeps/powerpc/fpu/fenv_libc.h (fesetenv_register): Dynamically choose mtfsf insn based on PPC_FEATURE_HAS_DFP. (relax_fenv_state): Same as above. (FPSCR_29): Reserve bit in ISA 2.05. (FPSCR_NI): Provide define for compat. * sysdeps/powerpc/fpu/fesetenv.c (_FPU_MASK_ALL): Define to replace magic numbers. * sysdeps/powerpc/fpu/feupdateenv.c (_FPU_MASK_ALL): Define to replace magic numbers. * sysdeps/powerpc/fpu/tst-setcontext-fpscr.c: New file. Test case to test setcontext and swapcontext with dynamic 64-bit FPSCR detection. * sysdeps/powerpc/powerpc32/fpu/__longjmp-common.S (__longjmp): Adjust access to hwcap to account for hwcap size increase to uint64_t. * sysdeps/powerpc/powerpc32/fpu/setjmp-common.S (__sigsetjmp ): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/getcontext-common.S (*setcontext): Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/power6/fpu/setcontext.S: New file. * sysdeps/unix/sysv/linux/powerpc/powerpc32/power6/fpu/swapcontext.S: New file. * sysdeps/unix/sysv/linux/powerpc/powerpc32/setcontext-common.S (*setcontext): dynamically select mtfsf insn based on PPC_FEATURE_HAS_DFP. Adjust access to hwcap to account for hwcap size increase to uint64_t. * sysdeps/unix/sysv/linux/powerpc/powerpc32/swapcontext-common.S (*swapcontext): dynamically select mtfsf insn based on PPC_FEATURE_HAS_DFP. Adjust access to hwcap to account for hwcap size increase to uint64_t. * sysdeps/unix/sysv/linux/powerpc/powerpc64/power6/fpu/setcontext.S: New file. * sysdeps/unix/sysv/linux/powerpc/powerpc64/power6/fpu/swapcontext.S: New file. * sysdeps/unix/sysv/linux/powerpc/powerpc64/setcontext.S (*setcontext): dynamically select mtfsf insn based on PPC_FEATURE_HAS_DFP. * sysdeps/unix/sysv/linux/powerpc/powerpc64/swapcontext.S (*swapcontext): dynamically select mtfsf insn based on PPC_FEATURE_HAS_DFP.
49 lines
1.7 KiB
C
49 lines
1.7 KiB
C
/* Store current floating-point environment and clear exceptions.
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Copyright (C) 1997, 2005, 2008 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but 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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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <fenv_libc.h>
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#include <fpu_control.h>
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#define _FPU_MASK_ALL (_FPU_MASK_ZM | _FPU_MASK_OM | _FPU_MASK_UM | _FPU_MASK_XM | _FPU_MASK_IM)
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int
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feholdexcept (fenv_t *envp)
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{
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fenv_union_t old, new;
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/* Save the currently set exceptions. */
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old.fenv = *envp = fegetenv_register ();
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/* Clear everything except for the rounding modes and non-IEEE arithmetic
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flag. */
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new.l[1] = old.l[1] & 7;
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new.l[0] = old.l[0];
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/* If the old env had any eabled exceptions, then mask SIGFPE in the
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MSR FE0/FE1 bits. This may allow the FPU to run faster because it
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always takes the default action and can not generate SIGFPE. */
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if ((old.l[1] & _FPU_MASK_ALL) != 0)
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(void)__fe_mask_env ();
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/* Put the new state in effect. */
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fesetenv_register (new.fenv);
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return 0;
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}
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libm_hidden_def (feholdexcept)
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