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Side by Side Diff: src/cached-powers.h

Issue 1102002: Rename files containing underscores. (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/
Patch Set: Created 10 years, 9 months ago
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1 // Copyright 2010 the V8 project authors. All rights reserved. 1 // Copyright 2010 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without 2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are 3 // modification, are permitted provided that the following conditions are
4 // met: 4 // met:
5 // 5 //
6 // * Redistributions of source code must retain the above copyright 6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer. 7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above 8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following 9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided 10 // disclaimer in the documentation and/or other materials provided
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21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 27
28 #ifndef V8_CACHED_POWERS_H_ 28 #ifndef V8_CACHED_POWERS_H_
29 #define V8_CACHED_POWERS_H_ 29 #define V8_CACHED_POWERS_H_
30 30
31 #include "diy_fp.h" 31 #include "diy-fp.h"
32 32
33 namespace v8 { 33 namespace v8 {
34 namespace internal { 34 namespace internal {
35 35
36 struct CachedPower { 36 struct CachedPower {
37 uint64_t significand; 37 uint64_t significand;
38 int16_t binary_exponent; 38 int16_t binary_exponent;
39 int16_t decimal_exponent; 39 int16_t decimal_exponent;
40 }; 40 };
41 41
42 // The following defines implement the interface between this file and the 42 // The following defines implement the interface between this file and the
43 // generated 'powers_ten.h'. 43 // generated 'powers_ten.h'.
44 // GRISU_CACHE_NAME(1) contains all possible cached powers. 44 // GRISU_CACHE_NAME(1) contains all possible cached powers.
45 // GRISU_CACHE_NAME(i) contains GRISU_CACHE_NAME(1) where only every 'i'th 45 // GRISU_CACHE_NAME(i) contains GRISU_CACHE_NAME(1) where only every 'i'th
46 // element is kept. More formally GRISU_CACHE_NAME(i) contains the elements j*i 46 // element is kept. More formally GRISU_CACHE_NAME(i) contains the elements j*i
47 // with 0 <= j < k with k such that j*k < the size of GRISU_CACHE_NAME(1). 47 // with 0 <= j < k with k such that j*k < the size of GRISU_CACHE_NAME(1).
48 // The higher 'i' is the fewer elements we use. 48 // The higher 'i' is the fewer elements we use.
49 // Given that there are less elements, the exponent-distance between two 49 // Given that there are less elements, the exponent-distance between two
50 // elements in the cache grows. The variable GRISU_CACHE_MAX_DISTANCE(i) stores 50 // elements in the cache grows. The variable GRISU_CACHE_MAX_DISTANCE(i) stores
51 // the maximum distance between two elements. 51 // the maximum distance between two elements.
52 #define GRISU_CACHE_STRUCT CachedPower 52 #define GRISU_CACHE_STRUCT CachedPower
53 #define GRISU_CACHE_NAME(i) kCachedPowers##i 53 #define GRISU_CACHE_NAME(i) kCachedPowers##i
54 #define GRISU_CACHE_MAX_DISTANCE(i) kCachedPowersMaxDistance##i 54 #define GRISU_CACHE_MAX_DISTANCE(i) kCachedPowersMaxDistance##i
55 #define GRISU_CACHE_OFFSET kCachedPowerOffset 55 #define GRISU_CACHE_OFFSET kCachedPowerOffset
56 #define GRISU_UINT64_C V8_2PART_UINT64_C 56 #define GRISU_UINT64_C V8_2PART_UINT64_C
57 // The following include imports the precompiled cached powers. 57 // The following include imports the precompiled cached powers.
58 #include "powers_ten.h" // NOLINT 58 #include "powers-ten.h" // NOLINT
59 59
60 static const double kD_1_LOG2_10 = 0.30102999566398114; // 1 / lg(10) 60 static const double kD_1_LOG2_10 = 0.30102999566398114; // 1 / lg(10)
61 61
62 // We can't use a function since we reference variables depending on the 'i'. 62 // We can't use a function since we reference variables depending on the 'i'.
63 // This way the compiler is able to see at compile time that only one 63 // This way the compiler is able to see at compile time that only one
64 // cache-array variable is used and thus can remove all the others. 64 // cache-array variable is used and thus can remove all the others.
65 #define COMPUTE_FOR_CACHE(i) \ 65 #define COMPUTE_FOR_CACHE(i) \
66 if (!found && (gamma - alpha + 1 >= GRISU_CACHE_MAX_DISTANCE(i))) { \ 66 if (!found && (gamma - alpha + 1 >= GRISU_CACHE_MAX_DISTANCE(i))) { \
67 int kQ = DiyFp::kSignificandSize; \ 67 int kQ = DiyFp::kSignificandSize; \
68 double k = ceiling((alpha - e + kQ - 1) * kD_1_LOG2_10); \ 68 double k = ceiling((alpha - e + kQ - 1) * kD_1_LOG2_10); \
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110 #undef GRISU_REDUCTION 110 #undef GRISU_REDUCTION
111 #undef GRISU_CACHE_STRUCT 111 #undef GRISU_CACHE_STRUCT
112 #undef GRISU_CACHE_NAME 112 #undef GRISU_CACHE_NAME
113 #undef GRISU_CACHE_MAX_DISTANCE 113 #undef GRISU_CACHE_MAX_DISTANCE
114 #undef GRISU_CACHE_OFFSET 114 #undef GRISU_CACHE_OFFSET
115 #undef GRISU_UINT64_C 115 #undef GRISU_UINT64_C
116 116
117 } } // namespace v8::internal 117 } } // namespace v8::internal
118 118
119 #endif // V8_CACHED_POWERS_H_ 119 #endif // V8_CACHED_POWERS_H_
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