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Diffstat (limited to 'libm/amd64/fenv.c')
-rw-r--r-- | libm/amd64/fenv.c | 148 |
1 files changed, 0 insertions, 148 deletions
diff --git a/libm/amd64/fenv.c b/libm/amd64/fenv.c deleted file mode 100644 index 2b43678..0000000 --- a/libm/amd64/fenv.c +++ /dev/null @@ -1,148 +0,0 @@ -/*- - * Copyright (c) 2004-2005 David Schultz <das@FreeBSD.ORG> - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * $FreeBSD: src/lib/msun/amd64/fenv.c,v 1.3 2005/03/16 19:03:45 das Exp $ - */ - -#include <sys/cdefs.h> -#include <sys/types.h> -#include <machine/fpu.h> -#include <fenv.h> - -const fenv_t __fe_dfl_env = { - { 0xffff0000 | __INITIAL_FPUCW__, - 0xffff0000, - 0xffffffff, - { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, - 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff } - }, - __INITIAL_MXCSR__ -}; - -int -fesetexceptflag(const fexcept_t *flagp, int excepts) -{ - fenv_t env; - - __fnstenv(&env.__x87); - env.__x87.__status &= ~excepts; - env.__x87.__status |= *flagp & excepts; - __fldenv(env.__x87); - - __stmxcsr(&env.__mxcsr); - env.__mxcsr &= ~excepts; - env.__mxcsr |= *flagp & excepts; - __ldmxcsr(env.__mxcsr); - - return (0); -} - -int -feraiseexcept(int excepts) -{ - fexcept_t ex = excepts; - - fesetexceptflag(&ex, excepts); - __fwait(); - return (0); -} - -int -fegetenv(fenv_t *envp) -{ - int control; - - /* - * fnstenv masks all exceptions, so we need to save and - * restore the control word to avoid this side effect. - */ - __fnstcw(&control); - __fnstenv(&envp->__x87); - __stmxcsr(&envp->__mxcsr); - __fldcw(control); - return (0); -} - -int -feholdexcept(fenv_t *envp) -{ - int mxcsr; - - __stmxcsr(&mxcsr); - __fnstenv(&envp->__x87); - __fnclex(); - envp->__mxcsr = mxcsr; - mxcsr &= ~FE_ALL_EXCEPT; - mxcsr |= FE_ALL_EXCEPT << _SSE_EMASK_SHIFT; - __ldmxcsr(mxcsr); - return (0); -} - -int -feupdateenv(const fenv_t *envp) -{ - int mxcsr, status; - - __fnstsw(&status); - __stmxcsr(&mxcsr); - fesetenv(envp); - feraiseexcept((mxcsr | status) & FE_ALL_EXCEPT); - return (0); -} - -int -__feenableexcept(int mask) -{ - int mxcsr, control, omask; - - mask &= FE_ALL_EXCEPT; - __fnstcw(&control); - __stmxcsr(&mxcsr); - omask = (control | mxcsr >> _SSE_EMASK_SHIFT) & FE_ALL_EXCEPT; - control &= ~mask; - __fldcw(control); - mxcsr &= ~(mask << _SSE_EMASK_SHIFT); - __ldmxcsr(mxcsr); - return (~omask); -} - -int -__fedisableexcept(int mask) -{ - int mxcsr, control, omask; - - mask &= FE_ALL_EXCEPT; - __fnstcw(&control); - __stmxcsr(&mxcsr); - omask = (control | mxcsr >> _SSE_EMASK_SHIFT) & FE_ALL_EXCEPT; - control |= mask; - __fldcw(control); - mxcsr |= mask << _SSE_EMASK_SHIFT; - __ldmxcsr(mxcsr); - return (~omask); -} - -__weak_reference(__feenableexcept, feenableexcept); -__weak_reference(__fedisableexcept, fedisableexcept); |