src/gallium/auxiliary/util/u_sse.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2008 VMware, Inc.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 /**
  29  * @file
  30  * SSE intrinsics portability header.
  31  *
  32  * Although the SSE intrinsics are support by all modern x86 and x86-64
  33  * compilers, there are some intrisincs missing in some implementations
  34  * (especially older MSVC versions). This header abstracts that away.
  35  */
  36
  37 #ifndef U_SSE_H_
  38 #define U_SSE_H_
  39
  40 #include "pipe/p_config.h"
  41
  42 #if defined(PIPE_ARCH_SSE)
  43
  44 #include <emmintrin.h>
  45
  46
  47 union m128i {
  48    __m128i m;
  49    ubyte ub[16];
  50    ushort us[8];
  51    uint ui[4];
  52 };
  53
  54 static inline void u_print_epi8(const char *name, __m128i r)
  55 {
  56    union { __m128i m; ubyte ub[16]; } u;
  57    u.m = r;
  58
  59    debug_printf("%s: "
  60                 "%02x/"
  61                 "%02x/"
  62                 "%02x/"
  63                 "%02x/"
  64                 "%02x/"
  65                 "%02x/"
  66                 "%02x/"
  67                 "%02x/"
  68                 "%02x/"
  69                 "%02x/"
  70                 "%02x/"
  71                 "%02x/"
  72                 "%02x/"
  73                 "%02x/"
  74                 "%02x/"
  75                 "%02x\n",
  76                 name,
  77                 u.ub[0],  u.ub[1],  u.ub[2],  u.ub[3],
  78                 u.ub[4],  u.ub[5],  u.ub[6],  u.ub[7],
  79                 u.ub[8],  u.ub[9],  u.ub[10], u.ub[11],
  80                 u.ub[12], u.ub[13], u.ub[14], u.ub[15]);
  81 }
  82
  83 static inline void u_print_epi16(const char *name, __m128i r)
  84 {
  85    union { __m128i m; ushort us[8]; } u;
  86    u.m = r;
  87
  88    debug_printf("%s: "
  89                 "%04x/"
  90                 "%04x/"
  91                 "%04x/"
  92                 "%04x/"
  93                 "%04x/"
  94                 "%04x/"
  95                 "%04x/"
  96                 "%04x\n",
  97                 name,
  98                 u.us[0],  u.us[1],  u.us[2],  u.us[3],
  99                 u.us[4],  u.us[5],  u.us[6],  u.us[7]);
 100 }
 101
 102 static inline void u_print_epi32(const char *name, __m128i r)
 103 {
 104    union { __m128i m; uint ui[4]; } u;
 105    u.m = r;
 106
 107    debug_printf("%s: "
 108                 "%08x/"
 109                 "%08x/"
 110                 "%08x/"
 111                 "%08x\n",
 112                 name,
 113                 u.ui[0],  u.ui[1],  u.ui[2],  u.ui[3]);
 114 }
 115
 116 static inline void u_print_ps(const char *name, __m128 r)
 117 {
 118    union { __m128 m; float f[4]; } u;
 119    u.m = r;
 120
 121    debug_printf("%s: "
 122                 "%f/"
 123                 "%f/"
 124                 "%f/"
 125                 "%f\n",
 126                 name,
 127                 u.f[0],  u.f[1],  u.f[2],  u.f[3]);
 128 }
 129
 130
 131 #define U_DUMP_EPI32(a) u_print_epi32(#a, a)
 132 #define U_DUMP_EPI16(a) u_print_epi16(#a, a)
 133 #define U_DUMP_EPI8(a)  u_print_epi8(#a, a)
 134 #define U_DUMP_PS(a)    u_print_ps(#a, a)
 135
 136
 137
 138 #if defined(PIPE_ARCH_SSSE3)
 139
 140 #include <tmmintrin.h>
 141
 142 #else /* !PIPE_ARCH_SSSE3 */
 143
 144 /**
 145  * Describe _mm_shuffle_epi8() with gcc extended inline assembly, for cases
 146  * where -mssse3 is not supported/enabled.
 147  *
 148  * MSVC will never get in here as its intrinsics support do not rely on
 149  * compiler command line options.
 150  */
 151 static __inline __m128i
 152 #ifdef __clang__
 153    __attribute__((__always_inline__, __nodebug__))
 154 #else
 155    __attribute__((__gnu_inline__, __always_inline__, __artificial__))
 156 #endif
 157 _mm_shuffle_epi8(__m128i a, __m128i mask)
 158 {
 159     __m128i result;
 160     __asm__("pshufb %1, %0"
 161             : "=x" (result)
 162             : "xm" (mask), "0" (a));
 163     return result;
 164 }
 165
 166 #endif /* !PIPE_ARCH_SSSE3 */
 167
 168
 169
 170
 171 /* Provide an SSE2 implementation of _mm_mullo_epi32() in terms of
 172  * _mm_mul_epu32().
 173  *
 174  * I suspect this works fine for us because one of our operands is
 175  * always positive, but not sure that this can be used for general
 176  * signed integer multiplication.
 177  *
 178  * This seems close enough to the speed of SSE4 and the real
 179  * _mm_mullo_epi32() intrinsic as to not justify adding an sse4
 180  * dependency at this point.
 181  */
 182 static inline __m128i mm_mullo_epi32(const __m128i a, const __m128i b)
 183 {
 184    __m128i a4   = _mm_srli_epi64(a, 32);  /* shift by one dword */
 185    __m128i b4   = _mm_srli_epi64(b, 32);  /* shift by one dword */
 186    __m128i ba   = _mm_mul_epu32(b, a);   /* multply dwords 0, 2 */
 187    __m128i b4a4 = _mm_mul_epu32(b4, a4); /* multiply dwords 1, 3 */
 188
 189    /* Interleave the results, either with shuffles or (slightly
 190     * faster) direct bit operations:
 191     */
 192 #if 0
 193    __m128i ba8             = _mm_shuffle_epi32(ba, 8);
 194    __m128i b4a48           = _mm_shuffle_epi32(b4a4, 8);
 195    __m128i result          = _mm_unpacklo_epi32(ba8, b4a48);
 196 #else
 197    __m128i mask            = _mm_setr_epi32(~0,0,~0,0);
 198    __m128i ba_mask         = _mm_and_si128(ba, mask);
 199    __m128i b4a4_mask_shift = _mm_slli_epi64(b4a4, 32);
 200    __m128i result          = _mm_or_si128(ba_mask, b4a4_mask_shift);
 201 #endif
 202
 203    return result;
 204 }
 205
 206
 207 static inline void
 208 transpose4_epi32(const __m128i * restrict a,
 209                  const __m128i * restrict b,
 210                  const __m128i * restrict c,
 211                  const __m128i * restrict d,
 212                  __m128i * restrict o,
 213                  __m128i * restrict p,
 214                  __m128i * restrict q,
 215                  __m128i * restrict r)
 216 {
 217   __m128i t0 = _mm_unpacklo_epi32(*a, *b);
 218   __m128i t1 = _mm_unpacklo_epi32(*c, *d);
 219   __m128i t2 = _mm_unpackhi_epi32(*a, *b);
 220   __m128i t3 = _mm_unpackhi_epi32(*c, *d);
 221
 222   *o = _mm_unpacklo_epi64(t0, t1);
 223   *p = _mm_unpackhi_epi64(t0, t1);
 224   *q = _mm_unpacklo_epi64(t2, t3);
 225   *r = _mm_unpackhi_epi64(t2, t3);
 226 }
 227
 228 #define SCALAR_EPI32(m, i) _mm_shuffle_epi32((m), _MM_SHUFFLE(i,i,i,i))
 229
 230
 231 #endif /* PIPE_ARCH_SSE */
 232
 233 #endif /* U_SSE_H_ */