1/**************************************************************************
2 *
3 * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
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 TUNGSTEN GRAPHICS 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/* MSVC before VC8 does not support the _mm_castxxx_yyy */
48#if defined(_MSC_VER) && _MSC_VER < 1500
49
50union __declspec(align(16)) m128_types {
51   __m128 m128;
52   __m128i m128i;
53   __m128d m128d;
54};
55
56static __inline __m128
57_mm_castsi128_ps(__m128i a)
58{
59   union m128_types u;
60   u.m128i = a;
61   return u.m128;
62}
63
64static __inline __m128i
65_mm_castps_si128(__m128 a)
66{
67   union m128_types u;
68   u.m128 = a;
69   return u.m128i;
70}
71
72#endif /* defined(_MSC_VER) && _MSC_VER < 1500 */
73
74union m128i {
75   __m128i m;
76   ubyte ub[16];
77   ushort us[8];
78   uint ui[4];
79};
80
81static INLINE void u_print_epi8(const char *name, __m128i r)
82{
83   union { __m128i m; ubyte ub[16]; } u;
84   u.m = r;
85
86   debug_printf("%s: "
87                "%02x/"
88                "%02x/"
89                "%02x/"
90                "%02x/"
91                "%02x/"
92                "%02x/"
93                "%02x/"
94                "%02x/"
95                "%02x/"
96                "%02x/"
97                "%02x/"
98                "%02x/"
99                "%02x/"
100                "%02x/"
101                "%02x/"
102                "%02x\n",
103                name,
104                u.ub[0],  u.ub[1],  u.ub[2],  u.ub[3],
105                u.ub[4],  u.ub[5],  u.ub[6],  u.ub[7],
106                u.ub[8],  u.ub[9],  u.ub[10], u.ub[11],
107                u.ub[12], u.ub[13], u.ub[14], u.ub[15]);
108}
109
110static INLINE void u_print_epi16(const char *name, __m128i r)
111{
112   union { __m128i m; ushort us[8]; } u;
113   u.m = r;
114
115   debug_printf("%s: "
116                "%04x/"
117                "%04x/"
118                "%04x/"
119                "%04x/"
120                "%04x/"
121                "%04x/"
122                "%04x/"
123                "%04x\n",
124                name,
125                u.us[0],  u.us[1],  u.us[2],  u.us[3],
126                u.us[4],  u.us[5],  u.us[6],  u.us[7]);
127}
128
129static INLINE void u_print_epi32(const char *name, __m128i r)
130{
131   union { __m128i m; uint ui[4]; } u;
132   u.m = r;
133
134   debug_printf("%s: "
135                "%08x/"
136                "%08x/"
137                "%08x/"
138                "%08x\n",
139                name,
140                u.ui[0],  u.ui[1],  u.ui[2],  u.ui[3]);
141}
142
143static INLINE void u_print_ps(const char *name, __m128 r)
144{
145   union { __m128 m; float f[4]; } u;
146   u.m = r;
147
148   debug_printf("%s: "
149                "%f/"
150                "%f/"
151                "%f/"
152                "%f\n",
153                name,
154                u.f[0],  u.f[1],  u.f[2],  u.f[3]);
155}
156
157
158#define U_DUMP_EPI32(a) u_print_epi32(#a, a)
159#define U_DUMP_EPI16(a) u_print_epi16(#a, a)
160#define U_DUMP_EPI8(a)  u_print_epi8(#a, a)
161#define U_DUMP_PS(a)    u_print_ps(#a, a)
162
163
164
165#if defined(PIPE_ARCH_SSSE3)
166
167#include <tmmintrin.h>
168
169#else /* !PIPE_ARCH_SSSE3 */
170
171/**
172 * Describe _mm_shuffle_epi8() with gcc extended inline assembly, for cases
173 * where -mssse3 is not supported/enabled.
174 *
175 * MSVC will never get in here as its intrinsics support do not rely on
176 * compiler command line options.
177 */
178static __inline __m128i __attribute__((__gnu_inline__, __always_inline__, __artificial__))
179_mm_shuffle_epi8(__m128i a, __m128i mask)
180{
181    __m128i result;
182    __asm__("pshufb %1, %0"
183            : "=x" (result)
184            : "xm" (mask), "0" (a));
185    return result;
186}
187
188#endif /* !PIPE_ARCH_SSSE3 */
189
190
191
192
193/* Provide an SSE2 implementation of _mm_mullo_epi32() in terms of
194 * _mm_mul_epu32().
195 *
196 * I suspect this works fine for us because one of our operands is
197 * always positive, but not sure that this can be used for general
198 * signed integer multiplication.
199 *
200 * This seems close enough to the speed of SSE4 and the real
201 * _mm_mullo_epi32() intrinsic as to not justify adding an sse4
202 * dependency at this point.
203 */
204static INLINE __m128i mm_mullo_epi32(const __m128i a, const __m128i b)
205{
206   __m128i a4   = _mm_srli_epi64(a, 32);  /* shift by one dword */
207   __m128i b4   = _mm_srli_epi64(b, 32);  /* shift by one dword */
208   __m128i ba   = _mm_mul_epu32(b, a);   /* multply dwords 0, 2 */
209   __m128i b4a4 = _mm_mul_epu32(b4, a4); /* multiply dwords 1, 3 */
210
211   /* Interleave the results, either with shuffles or (slightly
212    * faster) direct bit operations:
213    */
214#if 0
215   __m128i ba8             = _mm_shuffle_epi32(ba, 8);
216   __m128i b4a48           = _mm_shuffle_epi32(b4a4, 8);
217   __m128i result          = _mm_unpacklo_epi32(ba8, b4a48);
218#else
219   __m128i mask            = _mm_setr_epi32(~0,0,~0,0);
220   __m128i ba_mask         = _mm_and_si128(ba, mask);
221   __m128i b4a4_mask_shift = _mm_slli_epi64(b4a4, 32);
222   __m128i result          = _mm_or_si128(ba_mask, b4a4_mask_shift);
223#endif
224
225   return result;
226}
227
228
229static INLINE void
230transpose4_epi32(const __m128i * restrict a,
231                 const __m128i * restrict b,
232                 const __m128i * restrict c,
233                 const __m128i * restrict d,
234                 __m128i * restrict o,
235                 __m128i * restrict p,
236                 __m128i * restrict q,
237                 __m128i * restrict r)
238{
239  __m128i t0 = _mm_unpacklo_epi32(*a, *b);
240  __m128i t1 = _mm_unpacklo_epi32(*c, *d);
241  __m128i t2 = _mm_unpackhi_epi32(*a, *b);
242  __m128i t3 = _mm_unpackhi_epi32(*c, *d);
243
244  *o = _mm_unpacklo_epi64(t0, t1);
245  *p = _mm_unpackhi_epi64(t0, t1);
246  *q = _mm_unpacklo_epi64(t2, t3);
247  *r = _mm_unpackhi_epi64(t2, t3);
248}
249
250#define SCALAR_EPI32(m, i) _mm_shuffle_epi32((m), _MM_SHUFFLE(i,i,i,i))
251
252
253#endif /* PIPE_ARCH_SSE */
254
255#endif /* U_SSE_H_ */
256