99 lines
3.5 KiB
C
99 lines
3.5 KiB
C
/*
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* Copyright (c) 2003, 2007-14 Matteo Frigo
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* Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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/* detection of alignment. This is complicated because a machine may
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support multiple SIMD extensions (e.g. SSE2 and AVX) but only one
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set of alignment contraints. So this alignment stuff cannot be
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defined in the SIMD header files. Rather than defining a separate
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set of "machine" header files, we just do this ugly ifdef here. */
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#if defined(HAVE_SSE2) || defined(HAVE_AVX) || defined(HAVE_AVX2) || defined(HAVE_AVX_128_FMA) || defined(HAVE_AVX512)
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# if defined(FFTW_SINGLE)
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# define ALIGNMENT 8 /* Alignment for the LD/ST macros */
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# define ALIGNMENTA 16 /* Alignment for the LDA/STA macros */
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# else
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# define ALIGNMENT 16 /* Alignment for the LD/ST macros */
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# define ALIGNMENTA 16 /* Alignment for the LDA/STA macros */
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# endif
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#elif defined(HAVE_ALTIVEC)
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# define ALIGNMENT 8 /* Alignment for the LD/ST macros */
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# define ALIGNMENTA 16 /* Alignment for the LDA/STA macros */
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#elif defined(HAVE_NEON) || defined(HAVE_VSX)
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# define ALIGNMENT 8 /* Alignment for the LD/ST macros */
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# define ALIGNMENTA 8 /* Alignment for the LDA/STA macros */
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#elif defined(HAVE_KCVI)
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# if defined(FFTW_SINGLE)
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# define ALIGNMENT 8 /* Alignment for the LD/ST macros */
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# else
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# define ALIGNMENT 16 /* Alignment for the LD/ST macros */
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# endif
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# define ALIGNMENTA 64 /* Alignment for the LDA/STA macros */
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#elif defined(HAVE_GENERIC_SIMD256)
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# if defined(FFTW_SINGLE)
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# define ALIGNMENT 8
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# define ALIGNMENTA 32
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# else
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# define ALIGNMENT 16
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# define ALIGNMENTA 32
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# endif
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#elif defined(HAVE_GENERIC_SIMD128)
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# if defined(FFTW_SINGLE)
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# define ALIGNMENT 8
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# define ALIGNMENTA 16
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# else
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# define ALIGNMENT 16
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# define ALIGNMENTA 16
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# endif
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#endif
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#if HAVE_SIMD
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# ifndef ALIGNMENT
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# error "ALIGNMENT not defined"
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# endif
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# ifndef ALIGNMENTA
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# error "ALIGNMENTA not defined"
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# endif
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#endif
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/* rename for precision and for SIMD extensions */
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#define XSIMD0(name, suffix) CONCAT(name, suffix)
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#define XSIMD(name) XSIMD0(X(name), SIMD_SUFFIX)
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#define XSIMD_STRING(x) x STRINGIZE(SIMD_SUFFIX)
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/* TAINT_BIT is set if pointers are not guaranteed to be multiples of
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ALIGNMENT */
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#define TAINT_BIT 1
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/* TAINT_BITA is set if pointers are not guaranteed to be multiples of
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ALIGNMENTA */
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#define TAINT_BITA 2
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#define PTRINT(p) ((uintptr_t)(p))
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#define ALIGNED(p) \
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(((PTRINT(UNTAINT(p)) % ALIGNMENT) == 0) && !(PTRINT(p) & TAINT_BIT))
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#define ALIGNEDA(p) \
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(((PTRINT(UNTAINT(p)) % ALIGNMENTA) == 0) && !(PTRINT(p) & TAINT_BITA))
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#define SIMD_STRIDE_OK(x) (!(((x) * sizeof(R)) % ALIGNMENT))
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#define SIMD_STRIDE_OKA(x) (!(((x) * sizeof(R)) % ALIGNMENTA))
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#define SIMD_VSTRIDE_OK SIMD_STRIDE_OK
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