On Sat, Aug 28 17:43, Kevin Wolf wrote:
> + libm: fmod implementiert
>
> Signed-off-by: Kevin Wolf <kevin@xxxxxxxxxx>
> ---
> src/modules/include/math.h | 4 ++
> src/modules/lib/stdlibc/math/fmod.c | 69 +++++++++++++++++++++++++++++++++++
> 2 files changed, 73 insertions(+), 0 deletions(-)
> create mode 100644 src/modules/lib/stdlibc/math/fmod.c
>
> diff --git a/src/modules/include/math.h b/src/modules/include/math.h
> index 207fd3d..968411b 100644
> --- a/src/modules/include/math.h
> +++ b/src/modules/include/math.h
> @@ -117,6 +117,10 @@ long double nearbyintl(long double x);
> double rint(double x);
> double pow(double x, double y);
>
> +double fmod(double x, double y);
> +float fmodf(float x, float y);
> +long double fmodl(long double x, long double y);
> +
> #ifdef __cplusplus
> }; // extern "C"
> #endif
> diff --git a/src/modules/lib/stdlibc/math/fmod.c b/src/modules/lib/stdlibc/math/fmod.c
> new file mode 100644
> index 0000000..d691ca1
> --- /dev/null
> +++ b/src/modules/lib/stdlibc/math/fmod.c
> @@ -0,0 +1,69 @@
> +/*
> + * Copyright (c) 2010 The tyndur Project. All rights reserved.
> + *
> + * This code is derived from software contributed to the tyndur Project
> + * by Kevin Wolf.
> + *
> + * 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 COPYRIGHT HOLDERS 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 COPYRIGHT HOLDERS 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 <math.h>
> +#include <errno.h>
> +
> +double fmod(double x, double y)
> +{
> + double res;
> +
> + if (y == 0.0) {
> + errno = EDOM;
> + return NAN;
> + }
> +
> + asm("fprem" : "=t" (res) : "0" (x), "u" (y));
> + return res;
> +}
> +
> +float fmodf(float x, float y)
> +{
> + float res;
> +
> + if (y == 0.0) {
> + errno = EDOM;
> + return NAN;
> + }
> +
> + asm("fprem" : "=t" (res) : "0" (x), "u" (y));
> + return res;
> +}
> +
> +long double fmodl(long double x, long double y)
> +{
> + long double res;
> +
> + if (y == 0.0) {
> + errno = EDOM;
> + return NAN;
> + }
> +
> + asm("fprem" : "=t" (res) : "0" (x), "u" (y));
> + return res;
> +}
Hm wenn das da mit dem == 0.0 passt kann das rein. Müsste da nicht -0.0
auch noch abgefangen werden?
Acked-by: Antoine Kaufmann <toni@xxxxxxxxxx>
--
Antoine Kaufmann
<toni@xxxxxxxxxxxxxxxx>
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