1 /* Copyright (c) 2014, Cisco Systems, INC 2 Written by XiangMingZhu WeiZhou MinPeng YanWang 3 4 Redistribution and use in source and binary forms, with or without 5 modification, are permitted provided that the following conditions 6 are met: 7 8 - Redistributions of source code must retain the above copyright 9 notice, this list of conditions and the following disclaimer. 10 11 - Redistributions in binary form must reproduce the above copyright 12 notice, this list of conditions and the following disclaimer in the 13 documentation and/or other materials provided with the distribution. 14 15 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 18 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER 19 OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 20 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 22 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 23 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 24 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 25 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #if !defined(X86CPU_H) 29 # define X86CPU_H 30 31 # if defined(OPUS_X86_MAY_HAVE_SSE) 32 # define MAY_HAVE_SSE(name) name ## _sse 33 # else 34 # define MAY_HAVE_SSE(name) name ## _c 35 # endif 36 37 # if defined(OPUS_X86_MAY_HAVE_SSE2) 38 # define MAY_HAVE_SSE2(name) name ## _sse2 39 # else 40 # define MAY_HAVE_SSE2(name) name ## _c 41 # endif 42 43 # if defined(OPUS_X86_MAY_HAVE_SSE4_1) 44 # define MAY_HAVE_SSE4_1(name) name ## _sse4_1 45 # else 46 # define MAY_HAVE_SSE4_1(name) name ## _c 47 # endif 48 49 # if defined(OPUS_X86_MAY_HAVE_AVX) 50 # define MAY_HAVE_AVX(name) name ## _avx 51 # else 52 # define MAY_HAVE_AVX(name) name ## _c 53 # endif 54 55 # if defined(OPUS_HAVE_RTCD) 56 int opus_select_arch(void); 57 # endif 58 59 /*gcc appears to emit MOVDQA's to load the argument of an _mm_cvtepi8_epi32() 60 or _mm_cvtepi16_epi32() when optimizations are disabled, even though the 61 actual PMOVSXWD instruction takes an m32 or m64. Unlike a normal memory 62 reference, these require 16-byte alignment and load a full 16 bytes (instead 63 of 4 or 8), possibly reading out of bounds. 64 65 We can insert an explicit MOVD or MOVQ using _mm_cvtsi32_si128() or 66 _mm_loadl_epi64(), which should have the same semantics as an m32 or m64 67 reference in the PMOVSXWD instruction itself, but gcc is not smart enough to 68 optimize this out when optimizations ARE enabled. 69 70 Clang, in contrast, requires us to do this always for _mm_cvtepi8_epi32 71 (which is fair, since technically the compiler is always allowed to do the 72 dereference before invoking the function implementing the intrinsic). 73 However, it is smart enough to eliminate the extra MOVD instruction. 74 For _mm_cvtepi16_epi32, it does the right thing, though does *not* optimize out 75 the extra MOVQ if it's specified explicitly */ 76 77 # if defined(__clang__) || !defined(__OPTIMIZE__) 78 # define OP_CVTEPI8_EPI32_M32(x) \ 79 (_mm_cvtepi8_epi32(_mm_cvtsi32_si128(*(int *)(x)))) 80 # else 81 # define OP_CVTEPI8_EPI32_M32(x) \ 82 (_mm_cvtepi8_epi32(*(__m128i *)(x))) 83 #endif 84 85 /* similar reasoning about the instruction sequence as in the 32-bit macro above, 86 */ 87 # if defined(__clang__) || !defined(__OPTIMIZE__) 88 # define OP_CVTEPI16_EPI32_M64(x) \ 89 (_mm_cvtepi16_epi32(_mm_loadl_epi64((__m128i *)(x)))) 90 # else 91 # define OP_CVTEPI16_EPI32_M64(x) \ 92 (_mm_cvtepi16_epi32(*(__m128i *)(x))) 93 # endif 94 95 #endif 96
