mirror of
https://github.com/tildearrow/furnace.git
synced 2024-11-30 16:33:01 +00:00
144 lines
4.6 KiB
C
144 lines
4.6 KiB
C
/*
|
|
* Copyright (c) 2003, 2007-14 Matteo Frigo
|
|
* Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*
|
|
*/
|
|
|
|
|
|
#include "kernel/ifftw.h"
|
|
|
|
#if defined(HAVE_MALLOC_H)
|
|
# include <malloc.h>
|
|
#endif
|
|
|
|
/* ``kernel'' malloc(), with proper memory alignment */
|
|
|
|
#if defined(HAVE_DECL_MEMALIGN) && !HAVE_DECL_MEMALIGN
|
|
extern void *memalign(size_t, size_t);
|
|
#endif
|
|
|
|
#if defined(HAVE_DECL_POSIX_MEMALIGN) && !HAVE_DECL_POSIX_MEMALIGN
|
|
extern int posix_memalign(void **, size_t, size_t);
|
|
#endif
|
|
|
|
#if defined(macintosh) /* MacOS 9 */
|
|
# include <Multiprocessing.h>
|
|
#endif
|
|
|
|
#define real_free free /* memalign and malloc use ordinary free */
|
|
|
|
#define IS_POWER_OF_TWO(n) (((n) > 0) && (((n) & ((n) - 1)) == 0))
|
|
#if defined(WITH_OUR_MALLOC) && (MIN_ALIGNMENT >= 8) && IS_POWER_OF_TWO(MIN_ALIGNMENT)
|
|
/* Our own MIN_ALIGNMENT-aligned malloc/free. Assumes sizeof(void*) is a
|
|
power of two <= 8 and that malloc is at least sizeof(void*)-aligned.
|
|
|
|
The main reason for this routine is that, as of this writing,
|
|
Windows does not include any aligned allocation routines in its
|
|
system libraries, and instead provides an implementation with a
|
|
Visual C++ "Processor Pack" that you have to statically link into
|
|
your program. We do not want to require users to have VC++
|
|
(e.g. gcc/MinGW should be fine). Our code should be at least as good
|
|
as the MS _aligned_malloc, in any case, according to second-hand
|
|
reports of the algorithm it employs (also based on plain malloc). */
|
|
static void *our_malloc(size_t n)
|
|
{
|
|
void *p0, *p;
|
|
if (!(p0 = malloc(n + MIN_ALIGNMENT))) return (void *) 0;
|
|
p = (void *) (((uintptr_t) p0 + MIN_ALIGNMENT) & (~((uintptr_t) (MIN_ALIGNMENT - 1))));
|
|
*((void **) p - 1) = p0;
|
|
return p;
|
|
}
|
|
static void our_free(void *p)
|
|
{
|
|
if (p) free(*((void **) p - 1));
|
|
}
|
|
#endif
|
|
|
|
void *X(kernel_malloc)(size_t n)
|
|
{
|
|
void *p;
|
|
|
|
#if defined(MIN_ALIGNMENT)
|
|
|
|
# if defined(WITH_OUR_MALLOC)
|
|
p = our_malloc(n);
|
|
# undef real_free
|
|
# define real_free our_free
|
|
|
|
# elif defined(__FreeBSD__) && (MIN_ALIGNMENT <= 16)
|
|
/* FreeBSD does not have memalign, but its malloc is 16-byte aligned. */
|
|
p = malloc(n);
|
|
|
|
# elif (defined(__MACOSX__) || defined(__APPLE__)) && (MIN_ALIGNMENT <= 16)
|
|
/* MacOS X malloc is already 16-byte aligned */
|
|
p = malloc(n);
|
|
|
|
# elif defined(HAVE_MEMALIGN)
|
|
p = memalign(MIN_ALIGNMENT, n);
|
|
|
|
# elif defined(HAVE_POSIX_MEMALIGN)
|
|
/* note: posix_memalign is broken in glibc 2.2.5: it constrains
|
|
the size, not the alignment, to be (power of two) * sizeof(void*).
|
|
The bug seems to have been fixed as of glibc 2.3.1. */
|
|
if (posix_memalign(&p, MIN_ALIGNMENT, n))
|
|
p = (void*) 0;
|
|
|
|
# elif defined(__ICC) || defined(__INTEL_COMPILER) || defined(HAVE__MM_MALLOC)
|
|
/* Intel's C compiler defines _mm_malloc and _mm_free intrinsics */
|
|
p = (void *) _mm_malloc(n, MIN_ALIGNMENT);
|
|
# undef real_free
|
|
# define real_free _mm_free
|
|
|
|
# elif defined(_MSC_VER)
|
|
/* MS Visual C++ 6.0 with a "Processor Pack" supports SIMD
|
|
and _aligned_malloc/free (uses malloc.h) */
|
|
p = (void *) _aligned_malloc(n, MIN_ALIGNMENT);
|
|
# undef real_free
|
|
# define real_free _aligned_free
|
|
|
|
# elif defined(macintosh) /* MacOS 9 */
|
|
p = (void *) MPAllocateAligned(n,
|
|
# if MIN_ALIGNMENT == 8
|
|
kMPAllocate8ByteAligned,
|
|
# elif MIN_ALIGNMENT == 16
|
|
kMPAllocate16ByteAligned,
|
|
# elif MIN_ALIGNMENT == 32
|
|
kMPAllocate32ByteAligned,
|
|
# else
|
|
# error "Unknown alignment for MPAllocateAligned"
|
|
# endif
|
|
0);
|
|
# undef real_free
|
|
# define real_free MPFree
|
|
|
|
# else
|
|
/* Add your machine here and send a patch to fftw@fftw.org
|
|
or (e.g. for Windows) configure --with-our-malloc */
|
|
# error "Don't know how to malloc() aligned memory ... try configuring --with-our-malloc"
|
|
# endif
|
|
|
|
#else /* !defined(MIN_ALIGNMENT) */
|
|
p = malloc(n);
|
|
#endif
|
|
|
|
return p;
|
|
}
|
|
|
|
void X(kernel_free)(void *p)
|
|
{
|
|
real_free(p);
|
|
}
|