diff options
Diffstat (limited to 'libm/alpha')
| -rw-r--r-- | libm/alpha/Makefile.inc | 10 | ||||
| -rw-r--r-- | libm/alpha/_fpmath.h | 49 | ||||
| -rw-r--r-- | libm/alpha/fenv.c | 144 | ||||
| -rw-r--r-- | libm/alpha/fenv.h | 185 | ||||
| -rw-r--r-- | libm/alpha/s_copysign.S | 45 | ||||
| -rw-r--r-- | libm/alpha/s_copysignf.S | 45 |
6 files changed, 478 insertions, 0 deletions
diff --git a/libm/alpha/Makefile.inc b/libm/alpha/Makefile.inc new file mode 100644 index 0000000..f75ace9 --- /dev/null +++ b/libm/alpha/Makefile.inc @@ -0,0 +1,10 @@ +# $FreeBSD: src/lib/msun/alpha/Makefile.inc,v 1.2 2005/03/07 04:53:35 das Exp $ + +ARCH_SRCS = s_copysign.S s_copysignf.S +LDBL_PREC = 53 + +# XXX Comment from NetBSD/Alpha: +# XXX LINT SIGFPEs in e_exp.c's strtod(). FP underflow/denorm software +# handling is broken (doesn't exist!) on the Alpha port. +# Stock gcc 2.7.2.1 doesn't understand these options. +#CFLAGS += -mtrap-precision=i -mfp-trap-mode=su diff --git a/libm/alpha/_fpmath.h b/libm/alpha/_fpmath.h new file mode 100644 index 0000000..cfa235c --- /dev/null +++ b/libm/alpha/_fpmath.h @@ -0,0 +1,49 @@ +/*- + * Copyright (c) 2002, 2003 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/libc/alpha/_fpmath.h,v 1.6 2005/03/07 04:55:21 das Exp $ + */ + +union IEEEl2bits { + long double e; + struct { + unsigned int manl :32; + unsigned int manh :20; + unsigned int exp :11; + unsigned int sign :1; + } bits; +}; + +#define mask_nbit_l(u) ((void)0) +#define LDBL_IMPLICIT_NBIT +#define LDBL_NBIT 0 + +#define LDBL_MANH_SIZE 20 +#define LDBL_MANL_SIZE 32 + +#define LDBL_TO_ARRAY32(u, a) do { \ + (a)[0] = (uint32_t)(u).bits.manl; \ + (a)[1] = (uint32_t)(u).bits.manh; \ +} while(0) diff --git a/libm/alpha/fenv.c b/libm/alpha/fenv.c new file mode 100644 index 0000000..e8ab204 --- /dev/null +++ b/libm/alpha/fenv.c @@ -0,0 +1,144 @@ +/*- + * 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/alpha/fenv.c,v 1.2 2005/03/16 19:03:44 das Exp $ + */ + +#include <sys/cdefs.h> +#include <machine/sysarch.h> +#include <fenv.h> + +const fenv_t __fe_dfl_env = 0x680e000000000000ULL; + +struct mask_args { + fenv_t mask; +}; + +/* + * The lower 49 bits of the FPCR are unused by the hardware, so we use + * the lower order bits to store the kernel's idea of the FP mask as + * described in the Alpha Architecture Manual. + */ +int +fegetenv(fenv_t *envp) +{ + struct mask_args p; + union __fpcr r; + + /* + * The syscall acts as an implicit exception barrier, so we + * only need to issue an excb after the mf_fpcr to ensure that + * the read is executed before any subsequent FP ops. + */ + sysarch(ALPHA_GET_FPMASK, (char *)&p); + __mf_fpcr(&r.__d); + *envp = r.__bits | p.mask; + __excb(); + return (0); +} + +int +feholdexcept(fenv_t *envp) +{ + struct mask_args p; + union __fpcr r; + + sysarch(ALPHA_GET_FPMASK, (char *)&p); + __mf_fpcr(&r.__d); + *envp = r.__bits | p.mask; + r.__bits &= ~((fenv_t)FE_ALL_EXCEPT << _FPUSW_SHIFT); + __mt_fpcr(r.__d); + if (p.mask & FE_ALL_EXCEPT) { + p.mask = 0; + sysarch(ALPHA_SET_FPMASK, &p); + } + __excb(); + return (0); +} + +int +fesetenv(const fenv_t *envp) +{ + struct mask_args p; + union __fpcr r; + + p.mask = *envp & FE_ALL_EXCEPT; + sysarch(ALPHA_SET_FPMASK, &p); + r.__bits = *envp & ~FE_ALL_EXCEPT; + __mt_fpcr(r.__d); + __excb(); + return (0); +} + +int +feupdateenv(const fenv_t *envp) +{ + struct mask_args p; + union __fpcr oldr, newr; + + p.mask = *envp & FE_ALL_EXCEPT; + sysarch(ALPHA_SET_FPMASK, &p); + __mf_fpcr(&oldr.__d); + newr.__bits = *envp & ~FE_ALL_EXCEPT; + __excb(); + __mt_fpcr(newr.__d); + feraiseexcept((oldr.__bits >> _FPUSW_SHIFT) & FE_ALL_EXCEPT); + return (0); +} + +int +__feenableexcept(int mask) +{ + struct mask_args p; + + sysarch(ALPHA_GET_FPMASK, &p); + p.mask |= (mask & FE_ALL_EXCEPT); + sysarch(ALPHA_SET_FPMASK, &p); + return (p.mask); +} + +int +__fedisableexcept(int mask) +{ + struct mask_args p; + + sysarch(ALPHA_GET_FPMASK, &p); + p.mask &= ~(mask & FE_ALL_EXCEPT); + sysarch(ALPHA_SET_FPMASK, &p); + return (p.mask); +} + +int +__fegetexcept(void) +{ + struct mask_args p; + + sysarch(ALPHA_GET_FPMASK, &p); + return (p.mask); +} + +__weak_reference(__feenableexcept, feenableexcept); +__weak_reference(__fedisableexcept, fedisableexcept); +__weak_reference(__fegetexcept, fegetexcept); diff --git a/libm/alpha/fenv.h b/libm/alpha/fenv.h new file mode 100644 index 0000000..dc7bcb7 --- /dev/null +++ b/libm/alpha/fenv.h @@ -0,0 +1,185 @@ +/*- + * 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/alpha/fenv.h,v 1.3 2005/03/16 19:03:44 das Exp $ + */ + +#ifndef _FENV_H_ +#define _FENV_H_ + +#include <sys/_types.h> + +typedef __uint64_t fenv_t; +typedef __uint16_t fexcept_t; + +/* Exception flags */ +#define FE_INVALID 0x02 +#define FE_DIVBYZERO 0x04 +#define FE_OVERFLOW 0x08 +#define FE_UNDERFLOW 0x10 +#define FE_INEXACT 0x20 +#define FE_INTOVF 0x40 /* not maskable */ +#define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_INEXACT | FE_INTOVF | \ + FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW) + +/* Rounding modes */ +#define FE_TOWARDZERO 0x00 +#define FE_DOWNWARD 0x01 +#define FE_TONEAREST 0x02 +#define FE_UPWARD 0x03 +#define _ROUND_MASK (FE_TONEAREST | FE_DOWNWARD | \ + FE_UPWARD | FE_TOWARDZERO) +#define _ROUND_SHIFT 58 + +#define _FPUSW_SHIFT 51 + +#define __excb() __asm __volatile("excb") +#define __mf_fpcr(__cw) __asm __volatile("mf_fpcr %0" : "=f" (*(__cw))) +#define __mt_fpcr(__cw) __asm __volatile("mt_fpcr %0" : : "f" (__cw)) + +union __fpcr { + double __d; + fenv_t __bits; +}; + +__BEGIN_DECLS + +/* Default floating-point environment */ +extern const fenv_t __fe_dfl_env; +#define FE_DFL_ENV (&__fe_dfl_env) + +static __inline int +feclearexcept(int __excepts) +{ + union __fpcr __r; + + __excb(); + __mf_fpcr(&__r.__d); + __r.__bits &= ~((fenv_t)__excepts << _FPUSW_SHIFT); + __mt_fpcr(__r.__d); + __excb(); + return (0); +} + +static __inline int +fegetexceptflag(fexcept_t *__flagp, int __excepts) +{ + union __fpcr __r; + + __excb(); + __mf_fpcr(&__r.__d); + __excb(); + *__flagp = (__r.__bits >> _FPUSW_SHIFT) & __excepts; + return (0); +} + +static __inline int +fesetexceptflag(const fexcept_t *__flagp, int __excepts) +{ + union __fpcr __r; + fenv_t __xflag, __xexcepts; + + __xflag = (fenv_t)*__flagp << _FPUSW_SHIFT; + __xexcepts = (fenv_t)__excepts << _FPUSW_SHIFT; + __excb(); + __mf_fpcr(&__r.__d); + __r.__bits &= ~__xexcepts; + __r.__bits |= __xflag & __xexcepts; + __mt_fpcr(__r.__d); + __excb(); + return (0); +} + +static __inline int +feraiseexcept(int __excepts) +{ + + /* + * XXX Generating exceptions this way does not actually invoke + * a userland trap handler when enabled, but neither do + * arithmetic operations as far as I can tell. Perhaps there + * are more bugs in the kernel trap handler. + */ + fexcept_t __ex = __excepts; + fesetexceptflag(&__ex, __excepts); + return (0); +} + +static __inline int +fetestexcept(int __excepts) +{ + union __fpcr __r; + + __excb(); + __mf_fpcr(&__r.__d); + __excb(); + return ((__r.__bits >> _FPUSW_SHIFT) & __excepts); +} + +static __inline int +fegetround(void) +{ + union __fpcr __r; + + /* + * No exception barriers should be required here if we assume + * that only fesetround() can change the rounding mode. + */ + __mf_fpcr(&__r.__d); + return ((int)(__r.__bits >> _ROUND_SHIFT) & _ROUND_MASK); +} + +static __inline int +fesetround(int __round) +{ + union __fpcr __r; + + if (__round & ~_ROUND_MASK) + return (-1); + __excb(); + __mf_fpcr(&__r.__d); + __r.__bits &= ~((fenv_t)_ROUND_MASK << _ROUND_SHIFT); + __r.__bits |= (fenv_t)__round << _ROUND_SHIFT; + __mt_fpcr(__r.__d); + __excb(); + return (0); +} + +int fegetenv(fenv_t *__envp); +int feholdexcept(fenv_t *__envp); +int fesetenv(const fenv_t *__envp); +int feupdateenv(const fenv_t *__envp); + +#if __BSD_VISIBLE + +int feenableexcept(int __mask); +int fedisableexcept(int __mask); +int fegetexcept(void); + +#endif /* __BSD_VISIBLE */ + +__END_DECLS + +#endif /* !_FENV_H_ */ diff --git a/libm/alpha/s_copysign.S b/libm/alpha/s_copysign.S new file mode 100644 index 0000000..12381bb --- /dev/null +++ b/libm/alpha/s_copysign.S @@ -0,0 +1,45 @@ +/* $FreeBSD: src/lib/msun/alpha/s_copysign.S,v 1.2 1999/08/28 00:06:07 peter Exp $ */ +/* From: NetBSD: s_copysign.S,v 1.3 1997/07/30 23:58:38 jtc Exp */ + +/*- + * Copyright (c) 1996 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by J.T. Conklin. + * + * 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. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the NetBSD + * Foundation, Inc. and its contributors. + * 4. Neither the name of The NetBSD Foundation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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. + */ + +#include <machine/asm.h> + +LEAF(copysign, 2) + cpys fa1, fa0, fv0 + RET +END(copysign) diff --git a/libm/alpha/s_copysignf.S b/libm/alpha/s_copysignf.S new file mode 100644 index 0000000..2e5eda1 --- /dev/null +++ b/libm/alpha/s_copysignf.S @@ -0,0 +1,45 @@ +/* $FreeBSD: src/lib/msun/alpha/s_copysignf.S,v 1.2 1999/08/28 00:06:08 peter Exp $ */ +/* From: NetBSD: s_copysignf.S,v 1.3 1997/07/30 23:58:41 jtc Exp */ + +/*- + * Copyright (c) 1996 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by J.T. Conklin. + * + * 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. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the NetBSD + * Foundation, Inc. and its contributors. + * 4. Neither the name of The NetBSD Foundation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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. + */ + +#include <machine/asm.h> + +LEAF(copysignf, 2) + cpys fa1, fa0, fv0 + RET +END(copysignf) |