1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
|
###############################################################################
# Check for the presence of SSE and figure out the flags to use for it.
function(PCL_CHECK_FOR_SSE)
set(SSE_FLAGS)
set(SSE_DEFINITIONS)
if(PCL_ENABLE_MARCHNATIVE AND (NOT CMAKE_CROSSCOMPILING))
# Test GCC/G++ and CLANG
if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX OR CMAKE_COMPILER_IS_CLANG)
include(CheckCXXCompilerFlag)
check_cxx_compiler_flag("-march=native" HAVE_MARCH)
endif()
endif()
# Unfortunately we need to check for SSE to enable "-mfpmath=sse" alongside
# "-march=native". The reason for this is that by default, 32bit architectures
# tend to use the x87 FPU (which has 80 bit internal precision), thus leading
# to different results than 64bit architectures which are using SSE2 (64 bit internal
# precision). One solution would be to use "-ffloat-store" on 32bit (see
# http://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html), but that slows code down,
# so the preferred solution is to try "-mpfmath=sse" first.
include(CheckCXXSourceRuns)
set(CMAKE_REQUIRED_FLAGS)
set(SSE_LEVEL 0)
check_cxx_source_runs("
// Intel compiler defines an incompatible _mm_malloc signature
#if defined(__INTEL_COMPILER)
#include <malloc.h>
#else
#include <mm_malloc.h>
#endif
int main()
{
void* mem = _mm_malloc (100, 16);
return 0;
}"
HAVE_MM_MALLOC)
check_cxx_source_runs("
#include <stdlib.h>
int main()
{
void* mem;
return posix_memalign (&mem, 16, 100);
}"
HAVE_POSIX_MEMALIGN)
if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX OR CMAKE_COMPILER_IS_CLANG)
set(CMAKE_REQUIRED_FLAGS "-msse4.2")
endif()
check_cxx_source_runs("
#include <emmintrin.h>
#include <nmmintrin.h>
int main ()
{
long long a[2] = { 1, 2 };
long long b[2] = { -1, 3 };
long long c[2];
__m128i va = _mm_loadu_si128 ((__m128i*)a);
__m128i vb = _mm_loadu_si128 ((__m128i*)b);
__m128i vc = _mm_cmpgt_epi64 (va, vb);
_mm_storeu_si128 ((__m128i*)c, vc);
if (c[0] == -1LL && c[1] == 0LL)
return (0);
else
return (1);
}"
HAVE_SSE4_2_EXTENSIONS)
if(HAVE_SSE4_2_EXTENSIONS)
set(SSE_LEVEL 4.2)
endif()
if(SSE_LEVEL LESS 4.2)
if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX OR CMAKE_COMPILER_IS_CLANG)
set(CMAKE_REQUIRED_FLAGS "-msse4.1")
endif()
check_cxx_source_runs("
#include <smmintrin.h>
int main ()
{
__m128 a, b;
float vals[4] = {1, 2, 3, 4};
const int mask = 123;
a = _mm_loadu_ps (vals);
b = a;
b = _mm_dp_ps (a, a, mask);
_mm_storeu_ps (vals,b);
return (0);
}"
HAVE_SSE4_1_EXTENSIONS)
if(HAVE_SSE4_1_EXTENSIONS)
set(SSE_LEVEL 4.1)
endif()
endif()
if(SSE_LEVEL LESS 4.1)
if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX OR CMAKE_COMPILER_IS_CLANG)
set(CMAKE_REQUIRED_FLAGS "-mssse3")
endif()
check_cxx_source_runs("
#include <tmmintrin.h>
int main ()
{
__m128i a, b;
int vals[4] = {-1, -2, -3, -4};
a = _mm_loadu_si128 ((const __m128i*)vals);
b = _mm_abs_epi32 (a);
_mm_storeu_si128 ((__m128i*)vals, b);
return (0);
}"
HAVE_SSSE3_EXTENSIONS)
if(HAVE_SSSE3_EXTENSIONS)
set(SSE_LEVEL 3.1)
endif()
endif()
if(SSE_LEVEL LESS 3.1)
if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX OR CMAKE_COMPILER_IS_CLANG)
set(CMAKE_REQUIRED_FLAGS "-msse3")
endif()
check_cxx_source_runs("
#include <pmmintrin.h>
int main ()
{
__m128d a, b;
double vals[2] = {0};
a = _mm_loadu_pd (vals);
b = _mm_hadd_pd (a,a);
_mm_storeu_pd (vals, b);
return (0);
}"
HAVE_SSE3_EXTENSIONS)
if(HAVE_SSE3_EXTENSIONS)
set( SSE_LEVEL 3.0)
endif()
endif()
if(SSE_LEVEL LESS 3.0)
if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX OR CMAKE_COMPILER_IS_CLANG)
set(CMAKE_REQUIRED_FLAGS "-msse2")
elseif(MSVC AND NOT CMAKE_CL_64)
set(CMAKE_REQUIRED_FLAGS "/arch:SSE2")
endif()
check_cxx_source_runs("
#include <emmintrin.h>
int main ()
{
__m128d a, b;
double vals[2] = {0};
a = _mm_loadu_pd (vals);
b = _mm_add_pd (a,a);
_mm_storeu_pd (vals,b);
return (0);
}"
HAVE_SSE2_EXTENSIONS)
if(HAVE_SSE2_EXTENSIONS)
set(SSE_LEVEL 2.0)
endif()
endif()
if(SSE_LEVEL LESS 2.0)
if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX OR CMAKE_COMPILER_IS_CLANG)
set(CMAKE_REQUIRED_FLAGS "-msse")
elseif(MSVC AND NOT CMAKE_CL_64)
set(CMAKE_REQUIRED_FLAGS "/arch:SSE")
endif()
check_cxx_source_runs("
#include <xmmintrin.h>
int main ()
{
__m128 a, b;
float vals[4] = {0};
a = _mm_loadu_ps (vals);
b = a;
b = _mm_add_ps (a,b);
_mm_storeu_ps (vals,b);
return (0);
}"
HAVE_SSE_EXTENSIONS)
if(HAVE_SSE_EXTENSIONS)
set(SSE_LEVEL 1.0)
endif()
endif()
if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX OR CMAKE_COMPILER_IS_CLANG)
if(SSE_LEVEL GREATER_EQUAL 1.0)
if(SSE_LEVEL GREATER_EQUAL 4.2)
set(SSE_FLAGS "-msse4.2")
elseif(SSE_LEVEL GREATER_EQUAL 4.1)
set(SSE_FLAGS "-msse4.1")
elseif(SSE_LEVEL GREATER_EQUAL 3.1)
set(SSE_FLAGS "-msse3")
elseif(SSE_LEVEL GREATER_EQUAL 3.0)
set(SSE_FLAGS "-msse3")
elseif(SSE_LEVEL GREATER_EQUAL 2.0)
set(SSE_FLAGS "-msse2")
else()
set(SSE_FLAGS "-msse")
endif()
string(APPEND SSE_FLAGS " -mfpmath=sse")
else()
# Setting -ffloat-store to alleviate 32bit vs 64bit discrepancies on non-SSE
# platforms.
string(APPEND SSE_FLAGS " -ffloat-store")
endif()
if(PCL_ENABLE_MARCHNATIVE AND (NOT CMAKE_CROSSCOMPILING))
if(HAVE_MARCH)
string(APPEND SSE_FLAGS " -march=native")
else()
string(APPEND SSE_FLAGS " -mtune=native")
endif()
message(STATUS "Using CPU native flags for SSE optimization: ${SSE_FLAGS}")
endif()
elseif(MSVC AND NOT CMAKE_SIZEOF_VOID_P)
if(SSE_LEVEL GREATER_EQUAL 2.0)
set( SSE_FLAGS "/arch:SSE2")
elseif(SSE_LEVEL GREATER_EQUAL 1.0)
set( SSE_FLAGS "/arch:SSE")
endif()
elseif(MSVC)
if(SSE_LEVEL GREATER_EQUAL 4.2)
string(APPEND SSE_DEFINITIONS " -D__SSE4_2__")
endif()
if(SSE_LEVEL GREATER_EQUAL 4.1)
string(APPEND SSE_DEFINITIONS " -D__SSE4_1__")
endif()
if(SSE_LEVEL GREATER_EQUAL 3.1)
string(APPEND SSE_DEFINITIONS " -D__SSSE3__")
endif()
if(SSE_LEVEL GREATER_EQUAL 3.0)
string(APPEND SSE_DEFINITIONS " -D__SSE3__")
endif()
if(SSE_LEVEL GREATER_EQUAL 2.0)
string(APPEND SSE_DEFINITIONS " -D__SSE2__")
endif()
if(SSE_LEVEL GREATER_EQUAL 1.0)
string(APPEND SSE_DEFINITIONS " -D__SSE__")
endif()
endif()
set(SSE_FLAGS ${SSE_FLAGS} PARENT_SCOPE)
set(SSE_DEFINITIONS ${SSE_DEFINITIONS} PARENT_SCOPE)
unset(CMAKE_REQUIRED_FLAGS)
endfunction()
|
