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@@ -1,259 +0,0 @@
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-/*-
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- * Copyright (c) 2004-2005 David Schultz <[email protected]>
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- * All rights reserved.
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- *
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- * Redistribution and use in source and binary forms, with or without
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- * modification, are permitted provided that the following conditions
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- * are met:
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- * 1. Redistributions of source code must retain the above copyright
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- * notice, this list of conditions and the following disclaimer.
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- * 2. Redistributions in binary form must reproduce the above copyright
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- * notice, this list of conditions and the following disclaimer in the
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- * documentation and/or other materials provided with the distribution.
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- *
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- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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- * SUCH DAMAGE.
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- *
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- * $FreeBSD: src/lib/msun/i387/fenv.h,v 1.8 2011/10/10 15:43:09 das Exp $
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- */
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-
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-#ifndef _FENV_H_
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-#define _FENV_H_
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-
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-#include "cdefs-compat.h"
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-#include "types-compat.h"
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-
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-#ifndef __fenv_static
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-#define __fenv_static static
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-#endif
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-
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-/*
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- * To preserve binary compatibility with FreeBSD 5.3, we pack the
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- * mxcsr into some reserved fields, rather than changing sizeof(fenv_t).
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- */
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-typedef struct {
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- uint16_t __control;
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- uint16_t __mxcsr_hi;
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- uint16_t __status;
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- uint16_t __mxcsr_lo;
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- uint32_t __tag;
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- char __other[16];
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-} fenv_t;
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-
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-#define __get_mxcsr(env) (((env).__mxcsr_hi << 16) | \
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- ((env).__mxcsr_lo))
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-#define __set_mxcsr(env, x) do { \
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- (env).__mxcsr_hi = (uint32_t)(x) >> 16; \
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- (env).__mxcsr_lo = (uint16_t)(x); \
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-} while (0)
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-
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-typedef uint16_t fexcept_t;
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-
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-/* Exception flags */
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-#define FE_INVALID 0x01
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-#define FE_DENORMAL 0x02
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-#define FE_DIVBYZERO 0x04
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-#define FE_OVERFLOW 0x08
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-#define FE_UNDERFLOW 0x10
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-#define FE_INEXACT 0x20
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-#define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_DENORMAL | FE_INEXACT | \
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- FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)
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-
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-/* Rounding modes */
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-#define FE_TONEAREST 0x0000
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-#define FE_DOWNWARD 0x0400
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-#define FE_UPWARD 0x0800
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-#define FE_TOWARDZERO 0x0c00
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-#define _ROUND_MASK (FE_TONEAREST | FE_DOWNWARD | \
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- FE_UPWARD | FE_TOWARDZERO)
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-
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-/*
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- * As compared to the x87 control word, the SSE unit's control word
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- * has the rounding control bits offset by 3 and the exception mask
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- * bits offset by 7.
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- */
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-#define _SSE_ROUND_SHIFT 3
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-#define _SSE_EMASK_SHIFT 7
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-
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-__BEGIN_DECLS
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-
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-/* After testing for SSE support once, we cache the result in __has_sse. */
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-enum __sse_support { __SSE_YES, __SSE_NO, __SSE_UNK };
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-extern enum __sse_support __has_sse;
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-int __test_sse(void);
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-#ifdef __SSE__
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-#define __HAS_SSE() 1
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-#else
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-#define __HAS_SSE() (__has_sse == __SSE_YES || \
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- (__has_sse == __SSE_UNK && __test_sse()))
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-#endif
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-
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-/* Default floating-point environment */
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-extern const fenv_t __fe_dfl_env;
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-#define FE_DFL_ENV (&__fe_dfl_env)
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-
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-#define __fldcw(__cw) __asm __volatile("fldcw %0" : : "m" (__cw))
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-#define __fldenv(__env) __asm __volatile("fldenv %0" : : "m" (__env))
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-#define __fldenvx(__env) __asm __volatile("fldenv %0" : : "m" (__env) \
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- : "st", "st(1)", "st(2)", "st(3)", "st(4)", \
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- "st(5)", "st(6)", "st(7)")
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-#define __fnclex() __asm __volatile("fnclex")
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-#define __fnstenv(__env) __asm __volatile("fnstenv %0" : "=m" (*(__env)))
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-#define __fnstcw(__cw) __asm __volatile("fnstcw %0" : "=m" (*(__cw)))
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-#define __fnstsw(__sw) __asm __volatile("fnstsw %0" : "=am" (*(__sw)))
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-#define __fwait() __asm __volatile("fwait")
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-#define __ldmxcsr(__csr) __asm __volatile("ldmxcsr %0" : : "m" (__csr))
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-#define __stmxcsr(__csr) __asm __volatile("stmxcsr %0" : "=m" (*(__csr)))
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-
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-__fenv_static inline int
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-feclearexcept(int __excepts)
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-{
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- fenv_t __env;
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- uint32_t __mxcsr;
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-
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- if (__excepts == FE_ALL_EXCEPT) {
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- __fnclex();
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- } else {
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- __fnstenv(&__env);
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- __env.__status &= ~__excepts;
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- __fldenv(__env);
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- }
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- if (__HAS_SSE()) {
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- __stmxcsr(&__mxcsr);
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- __mxcsr &= ~__excepts;
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- __ldmxcsr(__mxcsr);
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- }
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- return (0);
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-}
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-
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-__fenv_static inline int
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-fegetexceptflag(fexcept_t *__flagp, int __excepts)
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-{
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- uint32_t __mxcsr;
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- uint16_t __status;
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-
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- __fnstsw(&__status);
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- if (__HAS_SSE())
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- __stmxcsr(&__mxcsr);
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- else
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- __mxcsr = 0;
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- *__flagp = (__mxcsr | __status) & __excepts;
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- return (0);
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-}
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-
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-int fesetexceptflag(const fexcept_t *__flagp, int __excepts);
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-int feraiseexcept(int __excepts);
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-
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-__fenv_static inline int
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-fetestexcept(int __excepts)
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-{
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- uint32_t __mxcsr;
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- uint16_t __status;
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-
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- __fnstsw(&__status);
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- if (__HAS_SSE())
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- __stmxcsr(&__mxcsr);
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- else
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- __mxcsr = 0;
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- return ((__status | __mxcsr) & __excepts);
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-}
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-
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-__fenv_static inline int
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-fegetround(void)
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-{
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- uint16_t __control;
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-
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- /*
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- * We assume that the x87 and the SSE unit agree on the
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- * rounding mode. Reading the control word on the x87 turns
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- * out to be about 5 times faster than reading it on the SSE
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- * unit on an Opteron 244.
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- */
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- __fnstcw(&__control);
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- return (__control & _ROUND_MASK);
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-}
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-
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-__fenv_static inline int
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-fesetround(int __round)
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-{
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- uint32_t __mxcsr;
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- uint16_t __control;
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-
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- if (__round & ~_ROUND_MASK)
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- return (-1);
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-
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- __fnstcw(&__control);
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- __control &= ~_ROUND_MASK;
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- __control |= __round;
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- __fldcw(__control);
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-
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- if (__HAS_SSE()) {
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- __stmxcsr(&__mxcsr);
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- __mxcsr &= ~(_ROUND_MASK << _SSE_ROUND_SHIFT);
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- __mxcsr |= __round << _SSE_ROUND_SHIFT;
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- __ldmxcsr(__mxcsr);
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- }
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-
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- return (0);
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-}
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-
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-int fegetenv(fenv_t *__envp);
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-int feholdexcept(fenv_t *__envp);
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-
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-__fenv_static inline int
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-fesetenv(const fenv_t *__envp)
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-{
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- fenv_t __env = *__envp;
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- uint32_t __mxcsr;
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-
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- __mxcsr = __get_mxcsr(__env);
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- __set_mxcsr(__env, 0xffffffff);
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- /*
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- * XXX Using fldenvx() instead of fldenv() tells the compiler that this
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- * instruction clobbers the i387 register stack. This happens because
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- * we restore the tag word from the saved environment. Normally, this
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- * would happen anyway and we wouldn't care, because the ABI allows
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- * function calls to clobber the i387 regs. However, fesetenv() is
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- * inlined, so we need to be more careful.
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- */
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- __fldenvx(__env);
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- if (__HAS_SSE())
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- __ldmxcsr(__mxcsr);
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- return (0);
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-}
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-
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-int feupdateenv(const fenv_t *__envp);
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-
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-#if __BSD_VISIBLE
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-
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-int feenableexcept(int __mask);
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-int fedisableexcept(int __mask);
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-
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-/* We currently provide no external definition of fegetexcept(). */
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-static inline int
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-fegetexcept(void)
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-{
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- uint16_t __control;
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-
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- /*
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- * We assume that the masks for the x87 and the SSE unit are
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- * the same.
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- */
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- __fnstcw(&__control);
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- return (~__control & FE_ALL_EXCEPT);
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-}
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-
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-#endif /* __BSD_VISIBLE */
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-
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-__END_DECLS
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-
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-#endif /* !_FENV_H_ */
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Viral B. Shah