96 lines
3.6 KiB
C
96 lines
3.6 KiB
C
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/* Copyright (c) 2014, Cisco Systems, INC
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Written by XiangMingZhu WeiZhou MinPeng YanWang
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
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OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#if !defined(X86CPU_H)
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# define X86CPU_H
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# if defined(OPUS_X86_MAY_HAVE_SSE)
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# define MAY_HAVE_SSE(name) name ## _sse
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# else
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# define MAY_HAVE_SSE(name) name ## _c
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# endif
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# if defined(OPUS_X86_MAY_HAVE_SSE2)
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# define MAY_HAVE_SSE2(name) name ## _sse2
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# else
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# define MAY_HAVE_SSE2(name) name ## _c
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# endif
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# if defined(OPUS_X86_MAY_HAVE_SSE4_1)
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# define MAY_HAVE_SSE4_1(name) name ## _sse4_1
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# else
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# define MAY_HAVE_SSE4_1(name) name ## _c
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# endif
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# if defined(OPUS_X86_MAY_HAVE_AVX)
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# define MAY_HAVE_AVX(name) name ## _avx
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# else
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# define MAY_HAVE_AVX(name) name ## _c
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# endif
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# if defined(OPUS_HAVE_RTCD)
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int opus_select_arch(void);
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# endif
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/*gcc appears to emit MOVDQA's to load the argument of an _mm_cvtepi8_epi32()
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or _mm_cvtepi16_epi32() when optimizations are disabled, even though the
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actual PMOVSXWD instruction takes an m32 or m64. Unlike a normal memory
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reference, these require 16-byte alignment and load a full 16 bytes (instead
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of 4 or 8), possibly reading out of bounds.
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We can insert an explicit MOVD or MOVQ using _mm_cvtsi32_si128() or
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_mm_loadl_epi64(), which should have the same semantics as an m32 or m64
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reference in the PMOVSXWD instruction itself, but gcc is not smart enough to
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optimize this out when optimizations ARE enabled.
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Clang, in contrast, requires us to do this always for _mm_cvtepi8_epi32
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(which is fair, since technically the compiler is always allowed to do the
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dereference before invoking the function implementing the intrinsic).
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However, it is smart enough to eliminate the extra MOVD instruction.
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For _mm_cvtepi16_epi32, it does the right thing, though does *not* optimize out
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the extra MOVQ if it's specified explicitly */
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# if defined(__clang__) || !defined(__OPTIMIZE__)
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# define OP_CVTEPI8_EPI32_M32(x) \
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(_mm_cvtepi8_epi32(_mm_cvtsi32_si128(*(int *)(x))))
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# else
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# define OP_CVTEPI8_EPI32_M32(x) \
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(_mm_cvtepi8_epi32(*(__m128i *)(x)))
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#endif
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/* similar reasoning about the instruction sequence as in the 32-bit macro above,
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*/
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# if defined(__clang__) || !defined(__OPTIMIZE__)
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# define OP_CVTEPI16_EPI32_M64(x) \
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(_mm_cvtepi16_epi32(_mm_loadl_epi64((__m128i *)(x))))
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# else
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# define OP_CVTEPI16_EPI32_M64(x) \
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(_mm_cvtepi16_epi32(*(__m128i *)(x)))
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# endif
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#endif
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