diff options
| -rw-r--r-- | lib/libc/arm/gen/Makefile.inc | 2 | ||||
| -rw-r--r-- | lib/libc/arm/gen/flt_rounds.c | 63 | ||||
| -rw-r--r-- | sys/arm/include/float.h | 6 |
3 files changed, 69 insertions, 2 deletions
diff --git a/lib/libc/arm/gen/Makefile.inc b/lib/libc/arm/gen/Makefile.inc index fb9d885..56d6e2e 100644 --- a/lib/libc/arm/gen/Makefile.inc +++ b/lib/libc/arm/gen/Makefile.inc @@ -3,4 +3,4 @@ SRCS+= _ctx_start.S _setjmp.S _set_tp.c alloca.S fabs.c \ infinity.c ldexp.c makecontext.c \ - setjmp.S signalcontext.c sigsetjmp.S divsi3.S + setjmp.S signalcontext.c sigsetjmp.S divsi3.S flt_rounds.c diff --git a/lib/libc/arm/gen/flt_rounds.c b/lib/libc/arm/gen/flt_rounds.c new file mode 100644 index 0000000..defb535 --- /dev/null +++ b/lib/libc/arm/gen/flt_rounds.c @@ -0,0 +1,63 @@ +/*- + * Copyright (c) 2012 Ian Lepore <freebsd@damnhippie.dyndns.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. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <fenv.h> +#include <float.h> + +#include "softfloat.h" + +int +__flt_rounds(void) +{ + +#ifndef ARM_HARD_FLOAT + /* + * Translate our rounding modes to the unnamed + * manifest constants required by C99 et. al. + */ + switch (__softfloat_float_rounding_mode) { + case FE_TOWARDZERO: + return (0); + case FE_TONEAREST: + return (1); + case FE_UPWARD: + return (2); + case FE_DOWNWARD: + return (3); + } + return (-1); +#else /* ARM_HARD_FLOAT */ + /* + * Apparently, the rounding mode is specified as part of the + * instruction format on ARM, so the dynamic rounding mode is + * indeterminate. Some FPUs may differ. + */ + return (-1); +#endif /* ARM_HARD_FLOAT */ +} diff --git a/sys/arm/include/float.h b/sys/arm/include/float.h index ac5ceb9..4696eae 100644 --- a/sys/arm/include/float.h +++ b/sys/arm/include/float.h @@ -44,7 +44,11 @@ extern int __flt_rounds(void); __END_DECLS #define FLT_RADIX 2 /* b */ -#define FLT_ROUNDS -1 +#ifndef _ARM_HARD_FLOAT +#define FLT_ROUNDS __flt_rounds() +#else +#define FLT_ROUNDS (-1) +#endif #define FLT_EVAL_METHOD (-1) /* XXX */ #define DECIMAL_DIG 17 /* max precision in decimal digits */ |
