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1 /* | 1 /* |
2 * Copyright (C) 2011, Google Inc. All rights reserved. | 2 * Copyright (C) 2011, Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions | 5 * modification, are permitted provided that the following conditions |
6 * are met: | 6 * are met: |
7 * 1. Redistributions of source code must retain the above copyright | 7 * 1. Redistributions of source code must retain the above copyright |
8 * notice, this list of conditions and the following disclaimer. | 8 * notice, this list of conditions and the following disclaimer. |
9 * 2. Redistributions in binary form must reproduce the above copyright | 9 * 2. Redistributions in binary form must reproduce the above copyright |
10 * notice, this list of conditions and the following disclaimer in the | 10 * notice, this list of conditions and the following disclaimer in the |
11 * documentation and/or other materials provided with the distribution. | 11 * documentation and/or other materials provided with the distribution. |
12 * | 12 * |
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND | 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND |
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
16 * ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE | 16 * ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE |
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
19 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER | 19 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
20 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | 20 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH | 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH |
23 * DAMAGE. | 23 * DAMAGE. |
24 */ | 24 */ |
25 | 25 |
26 #ifndef DenormalDisabler_h | 26 #ifndef DenormalDisabler_h |
27 #define DenormalDisabler_h | 27 #define DenormalDisabler_h |
28 | 28 |
| 29 #include <float.h> |
29 #include "wtf/Allocator.h" | 30 #include "wtf/Allocator.h" |
30 #include "wtf/CPU.h" | 31 #include "wtf/CPU.h" |
31 #include "wtf/MathExtras.h" | 32 #include "wtf/MathExtras.h" |
32 #include <float.h> | |
33 | 33 |
34 namespace blink { | 34 namespace blink { |
35 | 35 |
36 // Deal with denormals. They can very seriously impact performance on x86. | 36 // Deal with denormals. They can very seriously impact performance on x86. |
37 | 37 |
38 // Define HAVE_DENORMAL if we support flushing denormals to zero. | 38 // Define HAVE_DENORMAL if we support flushing denormals to zero. |
39 | 39 |
40 #if OS(WIN) && COMPILER(MSVC) | 40 #if OS(WIN) && COMPILER(MSVC) |
41 // Windows compiled using MSVC with SSE2 | 41 // Windows compiled using MSVC with SSE2 |
42 #define HAVE_DENORMAL 1 | 42 #define HAVE_DENORMAL 1 |
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142 return (fabs(f) < FLT_MIN) ? 0.0f : f; | 142 return (fabs(f) < FLT_MIN) ? 0.0f : f; |
143 } | 143 } |
144 }; | 144 }; |
145 | 145 |
146 #endif | 146 #endif |
147 | 147 |
148 } // namespace blink | 148 } // namespace blink |
149 | 149 |
150 #undef HAVE_DENORMAL | 150 #undef HAVE_DENORMAL |
151 #endif // DenormalDisabler_h | 151 #endif // DenormalDisabler_h |
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